git.sesse.net Git - ffmpeg/blob - libavcodec/videotoolboxenc.c

   1 /*
   2  * copyright (c) 2015 Rick Kern <kernrj@gmail.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <VideoToolbox/VideoToolbox.h>
  22 #include <CoreVideo/CoreVideo.h>
  23 #include <CoreMedia/CoreMedia.h>
  24 #include <TargetConditionals.h>
  25 #include <Availability.h>
  26 #include "avcodec.h"
  27 #include "libavutil/opt.h"
  28 #include "libavutil/avassert.h"
  29 #include "libavutil/avstring.h"
  30 #include "libavcodec/avcodec.h"
  31 #include "libavutil/pixdesc.h"
  32 #include "internal.h"
  33 #include <pthread.h>
  34 #include "atsc_a53.h"
  35 #include "h264.h"
  36 #include "h264_sei.h"
  37 #include <dlfcn.h>
  38
  39 #if !HAVE_KCMVIDEOCODECTYPE_HEVC
  40 enum { kCMVideoCodecType_HEVC = 'hvc1' };
  41 #endif
  42
  43 #if !HAVE_KCVPIXELFORMATTYPE_420YPCBCR10BIPLANARVIDEORANGE
  44 enum { kCVPixelFormatType_420YpCbCr10BiPlanarFullRange = 'xf20' };
  45 enum { kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange = 'x420' };
  46 #endif
  47
  48 typedef OSStatus (*getParameterSetAtIndex)(CMFormatDescriptionRef videoDesc,
  49                                            size_t parameterSetIndex,
  50                                            const uint8_t **parameterSetPointerOut,
  51                                            size_t *parameterSetSizeOut,
  52                                            size_t *parameterSetCountOut,
  53                                            int *NALUnitHeaderLengthOut);
  54
  55 //These symbols may not be present
  56 static struct{
  57     CFStringRef kCVImageBufferColorPrimaries_ITU_R_2020;
  58     CFStringRef kCVImageBufferTransferFunction_ITU_R_2020;
  59     CFStringRef kCVImageBufferYCbCrMatrix_ITU_R_2020;
  60
  61     CFStringRef kVTCompressionPropertyKey_H264EntropyMode;
  62     CFStringRef kVTH264EntropyMode_CAVLC;
  63     CFStringRef kVTH264EntropyMode_CABAC;
  64
  65     CFStringRef kVTProfileLevel_H264_Baseline_4_0;
  66     CFStringRef kVTProfileLevel_H264_Baseline_4_2;
  67     CFStringRef kVTProfileLevel_H264_Baseline_5_0;
  68     CFStringRef kVTProfileLevel_H264_Baseline_5_1;
  69     CFStringRef kVTProfileLevel_H264_Baseline_5_2;
  70     CFStringRef kVTProfileLevel_H264_Baseline_AutoLevel;
  71     CFStringRef kVTProfileLevel_H264_Main_4_2;
  72     CFStringRef kVTProfileLevel_H264_Main_5_1;
  73     CFStringRef kVTProfileLevel_H264_Main_5_2;
  74     CFStringRef kVTProfileLevel_H264_Main_AutoLevel;
  75     CFStringRef kVTProfileLevel_H264_High_3_0;
  76     CFStringRef kVTProfileLevel_H264_High_3_1;
  77     CFStringRef kVTProfileLevel_H264_High_3_2;
  78     CFStringRef kVTProfileLevel_H264_High_4_0;
  79     CFStringRef kVTProfileLevel_H264_High_4_1;
  80     CFStringRef kVTProfileLevel_H264_High_4_2;
  81     CFStringRef kVTProfileLevel_H264_High_5_1;
  82     CFStringRef kVTProfileLevel_H264_High_5_2;
  83     CFStringRef kVTProfileLevel_H264_High_AutoLevel;
  84     CFStringRef kVTProfileLevel_H264_Extended_5_0;
  85     CFStringRef kVTProfileLevel_H264_Extended_AutoLevel;
  86
  87     CFStringRef kVTProfileLevel_HEVC_Main_AutoLevel;
  88     CFStringRef kVTProfileLevel_HEVC_Main10_AutoLevel;
  89
  90     CFStringRef kVTCompressionPropertyKey_RealTime;
  91
  92     CFStringRef kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder;
  93     CFStringRef kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder;
  94
  95     getParameterSetAtIndex CMVideoFormatDescriptionGetHEVCParameterSetAtIndex;
  96 } compat_keys;
  97
  98 #define GET_SYM(symbol, defaultVal)                                     \
  99 do{                                                                     \
 100     CFStringRef* handle = (CFStringRef*)dlsym(RTLD_DEFAULT, #symbol);   \
 101     if(!handle)                                                         \
 102         compat_keys.symbol = CFSTR(defaultVal);                         \
 103     else                                                                \
 104         compat_keys.symbol = *handle;                                   \
 105 }while(0)
 106
 107 static pthread_once_t once_ctrl = PTHREAD_ONCE_INIT;
 108
 109 static void loadVTEncSymbols(){
 110     compat_keys.CMVideoFormatDescriptionGetHEVCParameterSetAtIndex =
 111         (getParameterSetAtIndex)dlsym(
 112             RTLD_DEFAULT,
 113             "CMVideoFormatDescriptionGetHEVCParameterSetAtIndex"
 114         );
 115
 116     GET_SYM(kCVImageBufferColorPrimaries_ITU_R_2020,   "ITU_R_2020");
 117     GET_SYM(kCVImageBufferTransferFunction_ITU_R_2020, "ITU_R_2020");
 118     GET_SYM(kCVImageBufferYCbCrMatrix_ITU_R_2020,      "ITU_R_2020");
 119
 120     GET_SYM(kVTCompressionPropertyKey_H264EntropyMode, "H264EntropyMode");
 121     GET_SYM(kVTH264EntropyMode_CAVLC, "CAVLC");
 122     GET_SYM(kVTH264EntropyMode_CABAC, "CABAC");
 123
 124     GET_SYM(kVTProfileLevel_H264_Baseline_4_0,       "H264_Baseline_4_0");
 125     GET_SYM(kVTProfileLevel_H264_Baseline_4_2,       "H264_Baseline_4_2");
 126     GET_SYM(kVTProfileLevel_H264_Baseline_5_0,       "H264_Baseline_5_0");
 127     GET_SYM(kVTProfileLevel_H264_Baseline_5_1,       "H264_Baseline_5_1");
 128     GET_SYM(kVTProfileLevel_H264_Baseline_5_2,       "H264_Baseline_5_2");
 129     GET_SYM(kVTProfileLevel_H264_Baseline_AutoLevel, "H264_Baseline_AutoLevel");
 130     GET_SYM(kVTProfileLevel_H264_Main_4_2,           "H264_Main_4_2");
 131     GET_SYM(kVTProfileLevel_H264_Main_5_1,           "H264_Main_5_1");
 132     GET_SYM(kVTProfileLevel_H264_Main_5_2,           "H264_Main_5_2");
 133     GET_SYM(kVTProfileLevel_H264_Main_AutoLevel,     "H264_Main_AutoLevel");
 134     GET_SYM(kVTProfileLevel_H264_High_3_0,           "H264_High_3_0");
 135     GET_SYM(kVTProfileLevel_H264_High_3_1,           "H264_High_3_1");
 136     GET_SYM(kVTProfileLevel_H264_High_3_2,           "H264_High_3_2");
 137     GET_SYM(kVTProfileLevel_H264_High_4_0,           "H264_High_4_0");
 138     GET_SYM(kVTProfileLevel_H264_High_4_1,           "H264_High_4_1");
 139     GET_SYM(kVTProfileLevel_H264_High_4_2,           "H264_High_4_2");
 140     GET_SYM(kVTProfileLevel_H264_High_5_1,           "H264_High_5_1");
 141     GET_SYM(kVTProfileLevel_H264_High_5_2,           "H264_High_5_2");
 142     GET_SYM(kVTProfileLevel_H264_High_AutoLevel,     "H264_High_AutoLevel");
 143     GET_SYM(kVTProfileLevel_H264_Extended_5_0,       "H264_Extended_5_0");
 144     GET_SYM(kVTProfileLevel_H264_Extended_AutoLevel, "H264_Extended_AutoLevel");
 145
 146     GET_SYM(kVTProfileLevel_HEVC_Main_AutoLevel,     "HEVC_Main_AutoLevel");
 147     GET_SYM(kVTProfileLevel_HEVC_Main10_AutoLevel,   "HEVC_Main10_AutoLevel");
 148
 149     GET_SYM(kVTCompressionPropertyKey_RealTime, "RealTime");
 150
 151     GET_SYM(kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder,
 152             "EnableHardwareAcceleratedVideoEncoder");
 153     GET_SYM(kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder,
 154             "RequireHardwareAcceleratedVideoEncoder");
 155 }
 156
 157 typedef enum VT_H264Profile {
 158     H264_PROF_AUTO,
 159     H264_PROF_BASELINE,
 160     H264_PROF_MAIN,
 161     H264_PROF_HIGH,
 162     H264_PROF_EXTENDED,
 163     H264_PROF_COUNT
 164 } VT_H264Profile;
 165
 166 typedef enum VTH264Entropy{
 167     VT_ENTROPY_NOT_SET,
 168     VT_CAVLC,
 169     VT_CABAC
 170 } VTH264Entropy;
 171
 172 typedef enum VT_HEVCProfile {
 173     HEVC_PROF_AUTO,
 174     HEVC_PROF_MAIN,
 175     HEVC_PROF_MAIN10,
 176     HEVC_PROF_COUNT
 177 } VT_HEVCProfile;
 178
 179 static const uint8_t start_code[] = { 0, 0, 0, 1 };
 180
 181 typedef struct ExtraSEI {
 182   void *data;
 183   size_t size;
 184 } ExtraSEI;
 185
 186 typedef struct BufNode {
 187     CMSampleBufferRef cm_buffer;
 188     ExtraSEI *sei;
 189     struct BufNode* next;
 190     int error;
 191 } BufNode;
 192
 193 typedef struct VTEncContext {
 194     AVClass *class;
 195     enum AVCodecID codec_id;
 196     VTCompressionSessionRef session;
 197     CFStringRef ycbcr_matrix;
 198     CFStringRef color_primaries;
 199     CFStringRef transfer_function;
 200     getParameterSetAtIndex get_param_set_func;
 201
 202     pthread_mutex_t lock;
 203     pthread_cond_t  cv_sample_sent;
 204
 205     int async_error;
 206
 207     BufNode *q_head;
 208     BufNode *q_tail;
 209
 210     int64_t frame_ct_out;
 211     int64_t frame_ct_in;
 212
 213     int64_t first_pts;
 214     int64_t dts_delta;
 215
 216     int64_t profile;
 217     int64_t level;
 218     int64_t entropy;
 219     int64_t realtime;
 220     int64_t frames_before;
 221     int64_t frames_after;
 222
 223     int64_t allow_sw;
 224     int64_t require_sw;
 225
 226     bool flushing;
 227     bool has_b_frames;
 228     bool warned_color_range;
 229
 230     /* can't be bool type since AVOption will access it as int */
 231     int a53_cc;
 232 } VTEncContext;
 233
 234 static int vtenc_populate_extradata(AVCodecContext   *avctx,
 235                                     CMVideoCodecType codec_type,
 236                                     CFStringRef      profile_level,
 237                                     CFNumberRef      gamma_level,
 238                                     CFDictionaryRef  enc_info,
 239                                     CFDictionaryRef  pixel_buffer_info);
 240
 241 /**
 242  * NULL-safe release of *refPtr, and sets value to NULL.
 243  */
 244 static void vt_release_num(CFNumberRef* refPtr){
 245     if (!*refPtr) {
 246         return;
 247     }
 248
 249     CFRelease(*refPtr);
 250     *refPtr = NULL;
 251 }
 252
 253 static void set_async_error(VTEncContext *vtctx, int err)
 254 {
 255     BufNode *info;
 256
 257     pthread_mutex_lock(&vtctx->lock);
 258
 259     vtctx->async_error = err;
 260
 261     info = vtctx->q_head;
 262     vtctx->q_head = vtctx->q_tail = NULL;
 263
 264     while (info) {
 265         BufNode *next = info->next;
 266         CFRelease(info->cm_buffer);
 267         av_free(info);
 268         info = next;
 269     }
 270
 271     pthread_mutex_unlock(&vtctx->lock);
 272 }
 273
 274 static void clear_frame_queue(VTEncContext *vtctx)
 275 {
 276     set_async_error(vtctx, 0);
 277 }
 278
 279 static int vtenc_q_pop(VTEncContext *vtctx, bool wait, CMSampleBufferRef *buf, ExtraSEI **sei)
 280 {
 281     BufNode *info;
 282
 283     pthread_mutex_lock(&vtctx->lock);
 284
 285     if (vtctx->async_error) {
 286         pthread_mutex_unlock(&vtctx->lock);
 287         return vtctx->async_error;
 288     }
 289
 290     if (vtctx->flushing && vtctx->frame_ct_in == vtctx->frame_ct_out) {
 291         *buf = NULL;
 292
 293         pthread_mutex_unlock(&vtctx->lock);
 294         return 0;
 295     }
 296
 297     while (!vtctx->q_head && !vtctx->async_error && wait && !vtctx->flushing) {
 298         pthread_cond_wait(&vtctx->cv_sample_sent, &vtctx->lock);
 299     }
 300
 301     if (!vtctx->q_head) {
 302         pthread_mutex_unlock(&vtctx->lock);
 303         *buf = NULL;
 304         return 0;
 305     }
 306
 307     info = vtctx->q_head;
 308     vtctx->q_head = vtctx->q_head->next;
 309     if (!vtctx->q_head) {
 310         vtctx->q_tail = NULL;
 311     }
 312
 313     vtctx->frame_ct_out++;
 314     pthread_mutex_unlock(&vtctx->lock);
 315
 316     *buf = info->cm_buffer;
 317     if (sei && *buf) {
 318         *sei = info->sei;
 319     } else if (info->sei) {
 320         if (info->sei->data) av_free(info->sei->data);
 321         av_free(info->sei);
 322     }
 323     av_free(info);
 324
 325
 326     return 0;
 327 }
 328
 329 static void vtenc_q_push(VTEncContext *vtctx, CMSampleBufferRef buffer, ExtraSEI *sei)
 330 {
 331     BufNode *info = av_malloc(sizeof(BufNode));
 332     if (!info) {
 333         set_async_error(vtctx, AVERROR(ENOMEM));
 334         return;
 335     }
 336
 337     CFRetain(buffer);
 338     info->cm_buffer = buffer;
 339     info->sei = sei;
 340     info->next = NULL;
 341
 342     pthread_mutex_lock(&vtctx->lock);
 343
 344     if (!vtctx->q_head) {
 345         vtctx->q_head = info;
 346     } else {
 347         vtctx->q_tail->next = info;
 348     }
 349
 350     vtctx->q_tail = info;
 351
 352     pthread_cond_signal(&vtctx->cv_sample_sent);
 353     pthread_mutex_unlock(&vtctx->lock);
 354 }
 355
 356 static int count_nalus(size_t length_code_size,
 357                        CMSampleBufferRef sample_buffer,
 358                        int *count)
 359 {
 360     size_t offset = 0;
 361     int status;
 362     int nalu_ct = 0;
 363     uint8_t size_buf[4];
 364     size_t src_size = CMSampleBufferGetTotalSampleSize(sample_buffer);
 365     CMBlockBufferRef block = CMSampleBufferGetDataBuffer(sample_buffer);
 366
 367     if (length_code_size > 4)
 368         return AVERROR_INVALIDDATA;
 369
 370     while (offset < src_size) {
 371         size_t curr_src_len;
 372         size_t box_len = 0;
 373         size_t i;
 374
 375         status = CMBlockBufferCopyDataBytes(block,
 376                                             offset,
 377                                             length_code_size,
 378                                             size_buf);
 379
 380         for (i = 0; i < length_code_size; i++) {
 381             box_len <<= 8;
 382             box_len |= size_buf[i];
 383         }
 384
 385         curr_src_len = box_len + length_code_size;
 386         offset += curr_src_len;
 387
 388         nalu_ct++;
 389     }
 390
 391     *count = nalu_ct;
 392     return 0;
 393 }
 394
 395 static CMVideoCodecType get_cm_codec_type(enum AVCodecID id)
 396 {
 397     switch (id) {
 398     case AV_CODEC_ID_H264: return kCMVideoCodecType_H264;
 399     case AV_CODEC_ID_HEVC: return kCMVideoCodecType_HEVC;
 400     default:               return 0;
 401     }
 402 }
 403
 404 /**
 405  * Get the parameter sets from a CMSampleBufferRef.
 406  * @param dst If *dst isn't NULL, the parameters are copied into existing
 407  *            memory. *dst_size must be set accordingly when *dst != NULL.
 408  *            If *dst is NULL, it will be allocated.
 409  *            In all cases, *dst_size is set to the number of bytes used starting
 410  *            at *dst.
 411  */
 412 static int get_params_size(
 413     AVCodecContext              *avctx,
 414     CMVideoFormatDescriptionRef vid_fmt,
 415     size_t                      *size)
 416 {
 417     VTEncContext *vtctx = avctx->priv_data;
 418     size_t total_size = 0;
 419     size_t ps_count;
 420     int is_count_bad = 0;
 421     size_t i;
 422     int status;
 423     status = vtctx->get_param_set_func(vid_fmt,
 424                                        0,
 425                                        NULL,
 426                                        NULL,
 427                                        &ps_count,
 428                                        NULL);
 429     if (status) {
 430         is_count_bad = 1;
 431         ps_count     = 0;
 432         status       = 0;
 433     }
 434
 435     for (i = 0; i < ps_count || is_count_bad; i++) {
 436         const uint8_t *ps;
 437         size_t ps_size;
 438         status = vtctx->get_param_set_func(vid_fmt,
 439                                            i,
 440                                            &ps,
 441                                            &ps_size,
 442                                            NULL,
 443                                            NULL);
 444         if (status) {
 445             /*
 446              * When ps_count is invalid, status != 0 ends the loop normally
 447              * unless we didn't get any parameter sets.
 448              */
 449             if (i > 0 && is_count_bad) status = 0;
 450
 451             break;
 452         }
 453
 454         total_size += ps_size + sizeof(start_code);
 455     }
 456
 457     if (status) {
 458         av_log(avctx, AV_LOG_ERROR, "Error getting parameter set sizes: %d\n", status);
 459         return AVERROR_EXTERNAL;
 460     }
 461
 462     *size = total_size;
 463     return 0;
 464 }
 465
 466 static int copy_param_sets(
 467     AVCodecContext              *avctx,
 468     CMVideoFormatDescriptionRef vid_fmt,
 469     uint8_t                     *dst,
 470     size_t                      dst_size)
 471 {
 472     VTEncContext *vtctx = avctx->priv_data;
 473     size_t ps_count;
 474     int is_count_bad = 0;
 475     int status;
 476     size_t offset = 0;
 477     size_t i;
 478
 479     status = vtctx->get_param_set_func(vid_fmt,
 480                                        0,
 481                                        NULL,
 482                                        NULL,
 483                                        &ps_count,
 484                                        NULL);
 485     if (status) {
 486         is_count_bad = 1;
 487         ps_count     = 0;
 488         status       = 0;
 489     }
 490
 491
 492     for (i = 0; i < ps_count || is_count_bad; i++) {
 493         const uint8_t *ps;
 494         size_t ps_size;
 495         size_t next_offset;
 496
 497         status = vtctx->get_param_set_func(vid_fmt,
 498                                            i,
 499                                            &ps,
 500                                            &ps_size,
 501                                            NULL,
 502                                            NULL);
 503         if (status) {
 504             if (i > 0 && is_count_bad) status = 0;
 505
 506             break;
 507         }
 508
 509         next_offset = offset + sizeof(start_code) + ps_size;
 510         if (dst_size < next_offset) {
 511             av_log(avctx, AV_LOG_ERROR, "Error: buffer too small for parameter sets.\n");
 512             return AVERROR_BUFFER_TOO_SMALL;
 513         }
 514
 515         memcpy(dst + offset, start_code, sizeof(start_code));
 516         offset += sizeof(start_code);
 517
 518         memcpy(dst + offset, ps, ps_size);
 519         offset = next_offset;
 520     }
 521
 522     if (status) {
 523         av_log(avctx, AV_LOG_ERROR, "Error getting parameter set data: %d\n", status);
 524         return AVERROR_EXTERNAL;
 525     }
 526
 527     return 0;
 528 }
 529
 530 static int set_extradata(AVCodecContext *avctx, CMSampleBufferRef sample_buffer)
 531 {
 532     CMVideoFormatDescriptionRef vid_fmt;
 533     size_t total_size;
 534     int status;
 535
 536     vid_fmt = CMSampleBufferGetFormatDescription(sample_buffer);
 537     if (!vid_fmt) {
 538         av_log(avctx, AV_LOG_ERROR, "No video format.\n");
 539         return AVERROR_EXTERNAL;
 540     }
 541
 542     status = get_params_size(avctx, vid_fmt, &total_size);
 543     if (status) {
 544         av_log(avctx, AV_LOG_ERROR, "Could not get parameter sets.\n");
 545         return status;
 546     }
 547
 548     avctx->extradata = av_mallocz(total_size + AV_INPUT_BUFFER_PADDING_SIZE);
 549     if (!avctx->extradata) {
 550         return AVERROR(ENOMEM);
 551     }
 552     avctx->extradata_size = total_size;
 553
 554     status = copy_param_sets(avctx, vid_fmt, avctx->extradata, total_size);
 555
 556     if (status) {
 557         av_log(avctx, AV_LOG_ERROR, "Could not copy param sets.\n");
 558         return status;
 559     }
 560
 561     return 0;
 562 }
 563
 564 static void vtenc_output_callback(
 565     void *ctx,
 566     void *sourceFrameCtx,
 567     OSStatus status,
 568     VTEncodeInfoFlags flags,
 569     CMSampleBufferRef sample_buffer)
 570 {
 571     AVCodecContext *avctx = ctx;
 572     VTEncContext   *vtctx = avctx->priv_data;
 573     ExtraSEI *sei = sourceFrameCtx;
 574
 575     if (vtctx->async_error) {
 576         return;
 577     }
 578
 579     if (status) {
 580         av_log(avctx, AV_LOG_ERROR, "Error encoding frame: %d\n", (int)status);
 581         set_async_error(vtctx, AVERROR_EXTERNAL);
 582         return;
 583     }
 584
 585     if (!sample_buffer) {
 586         return;
 587     }
 588
 589     if (!avctx->extradata && (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
 590         int set_status = set_extradata(avctx, sample_buffer);
 591         if (set_status) {
 592             set_async_error(vtctx, set_status);
 593             return;
 594         }
 595     }
 596
 597     vtenc_q_push(vtctx, sample_buffer, sei);
 598 }
 599
 600 static int get_length_code_size(
 601     AVCodecContext    *avctx,
 602     CMSampleBufferRef sample_buffer,
 603     size_t            *size)
 604 {
 605     VTEncContext *vtctx = avctx->priv_data;
 606     CMVideoFormatDescriptionRef vid_fmt;
 607     int isize;
 608     int status;
 609
 610     vid_fmt = CMSampleBufferGetFormatDescription(sample_buffer);
 611     if (!vid_fmt) {
 612         av_log(avctx, AV_LOG_ERROR, "Error getting buffer format description.\n");
 613         return AVERROR_EXTERNAL;
 614     }
 615
 616     status = vtctx->get_param_set_func(vid_fmt,
 617                                        0,
 618                                        NULL,
 619                                        NULL,
 620                                        NULL,
 621                                        &isize);
 622     if (status) {
 623         av_log(avctx, AV_LOG_ERROR, "Error getting length code size: %d\n", status);
 624         return AVERROR_EXTERNAL;
 625     }
 626
 627     *size = isize;
 628     return 0;
 629 }
 630
 631 /*
 632  * Returns true on success.
 633  *
 634  * If profile_level_val is NULL and this method returns true, don't specify the
 635  * profile/level to the encoder.
 636  */
 637 static bool get_vt_h264_profile_level(AVCodecContext *avctx,
 638                                       CFStringRef    *profile_level_val)
 639 {
 640     VTEncContext *vtctx = avctx->priv_data;
 641     int64_t profile = vtctx->profile;
 642
 643     if (profile == H264_PROF_AUTO && vtctx->level) {
 644         //Need to pick a profile if level is not auto-selected.
 645         profile = vtctx->has_b_frames ? H264_PROF_MAIN : H264_PROF_BASELINE;
 646     }
 647
 648     *profile_level_val = NULL;
 649
 650     switch (profile) {
 651         case H264_PROF_AUTO:
 652             return true;
 653
 654         case H264_PROF_BASELINE:
 655             switch (vtctx->level) {
 656                 case  0: *profile_level_val =
 657                                   compat_keys.kVTProfileLevel_H264_Baseline_AutoLevel; break;
 658                 case 13: *profile_level_val = kVTProfileLevel_H264_Baseline_1_3;       break;
 659                 case 30: *profile_level_val = kVTProfileLevel_H264_Baseline_3_0;       break;
 660                 case 31: *profile_level_val = kVTProfileLevel_H264_Baseline_3_1;       break;
 661                 case 32: *profile_level_val = kVTProfileLevel_H264_Baseline_3_2;       break;
 662                 case 40: *profile_level_val =
 663                                   compat_keys.kVTProfileLevel_H264_Baseline_4_0;       break;
 664                 case 41: *profile_level_val = kVTProfileLevel_H264_Baseline_4_1;       break;
 665                 case 42: *profile_level_val =
 666                                   compat_keys.kVTProfileLevel_H264_Baseline_4_2;       break;
 667                 case 50: *profile_level_val =
 668                                   compat_keys.kVTProfileLevel_H264_Baseline_5_0;       break;
 669                 case 51: *profile_level_val =
 670                                   compat_keys.kVTProfileLevel_H264_Baseline_5_1;       break;
 671                 case 52: *profile_level_val =
 672                                   compat_keys.kVTProfileLevel_H264_Baseline_5_2;       break;
 673             }
 674             break;
 675
 676         case H264_PROF_MAIN:
 677             switch (vtctx->level) {
 678                 case  0: *profile_level_val =
 679                                   compat_keys.kVTProfileLevel_H264_Main_AutoLevel; break;
 680                 case 30: *profile_level_val = kVTProfileLevel_H264_Main_3_0;       break;
 681                 case 31: *profile_level_val = kVTProfileLevel_H264_Main_3_1;       break;
 682                 case 32: *profile_level_val = kVTProfileLevel_H264_Main_3_2;       break;
 683                 case 40: *profile_level_val = kVTProfileLevel_H264_Main_4_0;       break;
 684                 case 41: *profile_level_val = kVTProfileLevel_H264_Main_4_1;       break;
 685                 case 42: *profile_level_val =
 686                                   compat_keys.kVTProfileLevel_H264_Main_4_2;       break;
 687                 case 50: *profile_level_val = kVTProfileLevel_H264_Main_5_0;       break;
 688                 case 51: *profile_level_val =
 689                                   compat_keys.kVTProfileLevel_H264_Main_5_1;       break;
 690                 case 52: *profile_level_val =
 691                                   compat_keys.kVTProfileLevel_H264_Main_5_2;       break;
 692             }
 693             break;
 694
 695         case H264_PROF_HIGH:
 696             switch (vtctx->level) {
 697                 case  0: *profile_level_val =
 698                                   compat_keys.kVTProfileLevel_H264_High_AutoLevel; break;
 699                 case 30: *profile_level_val =
 700                                   compat_keys.kVTProfileLevel_H264_High_3_0;       break;
 701                 case 31: *profile_level_val =
 702                                   compat_keys.kVTProfileLevel_H264_High_3_1;       break;
 703                 case 32: *profile_level_val =
 704                                   compat_keys.kVTProfileLevel_H264_High_3_2;       break;
 705                 case 40: *profile_level_val =
 706                                   compat_keys.kVTProfileLevel_H264_High_4_0;       break;
 707                 case 41: *profile_level_val =
 708                                   compat_keys.kVTProfileLevel_H264_High_4_1;       break;
 709                 case 42: *profile_level_val =
 710                                   compat_keys.kVTProfileLevel_H264_High_4_2;       break;
 711                 case 50: *profile_level_val = kVTProfileLevel_H264_High_5_0;       break;
 712                 case 51: *profile_level_val =
 713                                   compat_keys.kVTProfileLevel_H264_High_5_1;       break;
 714                 case 52: *profile_level_val =
 715                                   compat_keys.kVTProfileLevel_H264_High_5_2;       break;
 716             }
 717             break;
 718         case H264_PROF_EXTENDED:
 719             switch (vtctx->level) {
 720                 case  0: *profile_level_val =
 721                                   compat_keys.kVTProfileLevel_H264_Extended_AutoLevel; break;
 722                 case 50: *profile_level_val =
 723                                   compat_keys.kVTProfileLevel_H264_Extended_5_0;       break;
 724             }
 725             break;
 726     }
 727
 728     if (!*profile_level_val) {
 729         av_log(avctx, AV_LOG_ERROR, "Invalid Profile/Level.\n");
 730         return false;
 731     }
 732
 733     return true;
 734 }
 735
 736 /*
 737  * Returns true on success.
 738  *
 739  * If profile_level_val is NULL and this method returns true, don't specify the
 740  * profile/level to the encoder.
 741  */
 742 static bool get_vt_hevc_profile_level(AVCodecContext *avctx,
 743                                       CFStringRef    *profile_level_val)
 744 {
 745     VTEncContext *vtctx = avctx->priv_data;
 746     int64_t profile = vtctx->profile;
 747
 748     *profile_level_val = NULL;
 749
 750     switch (profile) {
 751         case HEVC_PROF_AUTO:
 752             return true;
 753         case HEVC_PROF_MAIN:
 754             *profile_level_val =
 755                 compat_keys.kVTProfileLevel_HEVC_Main_AutoLevel;
 756             break;
 757         case HEVC_PROF_MAIN10:
 758             *profile_level_val =
 759                 compat_keys.kVTProfileLevel_HEVC_Main10_AutoLevel;
 760             break;
 761     }
 762
 763     if (!*profile_level_val) {
 764         av_log(avctx, AV_LOG_ERROR, "Invalid Profile/Level.\n");
 765         return false;
 766     }
 767
 768     return true;
 769 }
 770
 771 static int get_cv_pixel_format(AVCodecContext* avctx,
 772                                enum AVPixelFormat fmt,
 773                                enum AVColorRange range,
 774                                int* av_pixel_format,
 775                                int* range_guessed)
 776 {
 777     if (range_guessed) *range_guessed = range != AVCOL_RANGE_MPEG &&
 778                                         range != AVCOL_RANGE_JPEG;
 779
 780     //MPEG range is used when no range is set
 781     if (fmt == AV_PIX_FMT_NV12) {
 782         *av_pixel_format = range == AVCOL_RANGE_JPEG ?
 783                                         kCVPixelFormatType_420YpCbCr8BiPlanarFullRange :
 784                                         kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
 785     } else if (fmt == AV_PIX_FMT_YUV420P) {
 786         *av_pixel_format = range == AVCOL_RANGE_JPEG ?
 787                                         kCVPixelFormatType_420YpCbCr8PlanarFullRange :
 788                                         kCVPixelFormatType_420YpCbCr8Planar;
 789     } else if (fmt == AV_PIX_FMT_P010LE) {
 790         *av_pixel_format = range == AVCOL_RANGE_JPEG ?
 791                                         kCVPixelFormatType_420YpCbCr10BiPlanarFullRange :
 792                                         kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange;
 793     } else {
 794         return AVERROR(EINVAL);
 795     }
 796
 797     return 0;
 798 }
 799
 800 static void add_color_attr(AVCodecContext *avctx, CFMutableDictionaryRef dict) {
 801     VTEncContext *vtctx = avctx->priv_data;
 802
 803     if (vtctx->color_primaries) {
 804         CFDictionarySetValue(dict,
 805                              kCVImageBufferColorPrimariesKey,
 806                              vtctx->color_primaries);
 807     }
 808
 809     if (vtctx->transfer_function) {
 810         CFDictionarySetValue(dict,
 811                              kCVImageBufferTransferFunctionKey,
 812                              vtctx->transfer_function);
 813     }
 814
 815     if (vtctx->ycbcr_matrix) {
 816         CFDictionarySetValue(dict,
 817                              kCVImageBufferYCbCrMatrixKey,
 818                              vtctx->ycbcr_matrix);
 819     }
 820 }
 821
 822 static int create_cv_pixel_buffer_info(AVCodecContext* avctx,
 823                                        CFMutableDictionaryRef* dict)
 824 {
 825     CFNumberRef cv_color_format_num = NULL;
 826     CFNumberRef width_num = NULL;
 827     CFNumberRef height_num = NULL;
 828     CFMutableDictionaryRef pixel_buffer_info = NULL;
 829     int cv_color_format;
 830     int status = get_cv_pixel_format(avctx,
 831                                      avctx->pix_fmt,
 832                                      avctx->color_range,
 833                                      &cv_color_format,
 834                                      NULL);
 835     if (status) return status;
 836
 837     pixel_buffer_info = CFDictionaryCreateMutable(
 838                             kCFAllocatorDefault,
 839                             20,
 840                             &kCFCopyStringDictionaryKeyCallBacks,
 841                             &kCFTypeDictionaryValueCallBacks);
 842
 843     if (!pixel_buffer_info) goto pbinfo_nomem;
 844
 845     cv_color_format_num = CFNumberCreate(kCFAllocatorDefault,
 846                                          kCFNumberSInt32Type,
 847                                          &cv_color_format);
 848     if (!cv_color_format_num) goto pbinfo_nomem;
 849
 850     CFDictionarySetValue(pixel_buffer_info,
 851                          kCVPixelBufferPixelFormatTypeKey,
 852                          cv_color_format_num);
 853     vt_release_num(&cv_color_format_num);
 854
 855     width_num = CFNumberCreate(kCFAllocatorDefault,
 856                                kCFNumberSInt32Type,
 857                                &avctx->width);
 858     if (!width_num) return AVERROR(ENOMEM);
 859
 860     CFDictionarySetValue(pixel_buffer_info,
 861                          kCVPixelBufferWidthKey,
 862                          width_num);
 863     vt_release_num(&width_num);
 864
 865     height_num = CFNumberCreate(kCFAllocatorDefault,
 866                                 kCFNumberSInt32Type,
 867                                 &avctx->height);
 868     if (!height_num) goto pbinfo_nomem;
 869
 870     CFDictionarySetValue(pixel_buffer_info,
 871                          kCVPixelBufferHeightKey,
 872                          height_num);
 873     vt_release_num(&height_num);
 874
 875     add_color_attr(avctx, pixel_buffer_info);
 876
 877     *dict = pixel_buffer_info;
 878     return 0;
 879
 880 pbinfo_nomem:
 881     vt_release_num(&cv_color_format_num);
 882     vt_release_num(&width_num);
 883     vt_release_num(&height_num);
 884     if (pixel_buffer_info) CFRelease(pixel_buffer_info);
 885
 886     return AVERROR(ENOMEM);
 887 }
 888
 889 static int get_cv_color_primaries(AVCodecContext *avctx,
 890                                   CFStringRef *primaries)
 891 {
 892     enum AVColorPrimaries pri = avctx->color_primaries;
 893     switch (pri) {
 894         case AVCOL_PRI_UNSPECIFIED:
 895             *primaries = NULL;
 896             break;
 897
 898         case AVCOL_PRI_BT470BG:
 899             *primaries = kCVImageBufferColorPrimaries_EBU_3213;
 900             break;
 901
 902         case AVCOL_PRI_SMPTE170M:
 903             *primaries = kCVImageBufferColorPrimaries_SMPTE_C;
 904             break;
 905
 906         case AVCOL_PRI_BT709:
 907             *primaries = kCVImageBufferColorPrimaries_ITU_R_709_2;
 908             break;
 909
 910         case AVCOL_PRI_BT2020:
 911             *primaries = compat_keys.kCVImageBufferColorPrimaries_ITU_R_2020;
 912             break;
 913
 914         default:
 915             av_log(avctx, AV_LOG_ERROR, "Color primaries %s is not supported.\n", av_color_primaries_name(pri));
 916             *primaries = NULL;
 917             return -1;
 918     }
 919
 920     return 0;
 921 }
 922
 923 static int get_cv_transfer_function(AVCodecContext *avctx,
 924                                     CFStringRef *transfer_fnc,
 925                                     CFNumberRef *gamma_level)
 926 {
 927     enum AVColorTransferCharacteristic trc = avctx->color_trc;
 928     Float32 gamma;
 929     *gamma_level = NULL;
 930
 931     switch (trc) {
 932         case AVCOL_TRC_UNSPECIFIED:
 933             *transfer_fnc = NULL;
 934             break;
 935
 936         case AVCOL_TRC_BT709:
 937             *transfer_fnc = kCVImageBufferTransferFunction_ITU_R_709_2;
 938             break;
 939
 940         case AVCOL_TRC_SMPTE240M:
 941             *transfer_fnc = kCVImageBufferTransferFunction_SMPTE_240M_1995;
 942             break;
 943
 944 #if HAVE_KCVIMAGEBUFFERTRANSFERFUNCTION_SMPTE_ST_2084_PQ
 945         case AVCOL_TRC_SMPTE2084:
 946             *transfer_fnc = kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ;
 947             break;
 948 #endif
 949 #if HAVE_KCVIMAGEBUFFERTRANSFERFUNCTION_LINEAR
 950         case AVCOL_TRC_LINEAR:
 951             *transfer_fnc = kCVImageBufferTransferFunction_Linear;
 952             break;
 953 #endif
 954 #if HAVE_KCVIMAGEBUFFERTRANSFERFUNCTION_ITU_R_2100_HLG
 955         case AVCOL_TRC_ARIB_STD_B67:
 956             *transfer_fnc = kCVImageBufferTransferFunction_ITU_R_2100_HLG;
 957             break;
 958 #endif
 959
 960         case AVCOL_TRC_GAMMA22:
 961             gamma = 2.2;
 962             *transfer_fnc = kCVImageBufferTransferFunction_UseGamma;
 963             *gamma_level = CFNumberCreate(NULL, kCFNumberFloat32Type, &gamma);
 964             break;
 965
 966         case AVCOL_TRC_GAMMA28:
 967             gamma = 2.8;
 968             *transfer_fnc = kCVImageBufferTransferFunction_UseGamma;
 969             *gamma_level = CFNumberCreate(NULL, kCFNumberFloat32Type, &gamma);
 970             break;
 971
 972         case AVCOL_TRC_BT2020_10:
 973         case AVCOL_TRC_BT2020_12:
 974             *transfer_fnc = compat_keys.kCVImageBufferTransferFunction_ITU_R_2020;
 975             break;
 976
 977         default:
 978             *transfer_fnc = NULL;
 979             av_log(avctx, AV_LOG_ERROR, "Transfer function %s is not supported.\n", av_color_transfer_name(trc));
 980             return -1;
 981     }
 982
 983     return 0;
 984 }
 985
 986 static int get_cv_ycbcr_matrix(AVCodecContext *avctx, CFStringRef *matrix) {
 987     switch(avctx->colorspace) {
 988         case AVCOL_SPC_BT709:
 989             *matrix = kCVImageBufferYCbCrMatrix_ITU_R_709_2;
 990             break;
 991
 992         case AVCOL_SPC_UNSPECIFIED:
 993             *matrix = NULL;
 994             break;
 995
 996         case AVCOL_SPC_BT470BG:
 997         case AVCOL_SPC_SMPTE170M:
 998             *matrix = kCVImageBufferYCbCrMatrix_ITU_R_601_4;
 999             break;
1000
1001         case AVCOL_SPC_SMPTE240M:
1002             *matrix = kCVImageBufferYCbCrMatrix_SMPTE_240M_1995;
1003             break;
1004
1005         case AVCOL_SPC_BT2020_NCL:
1006             *matrix = compat_keys.kCVImageBufferYCbCrMatrix_ITU_R_2020;
1007             break;
1008
1009         default:
1010             av_log(avctx, AV_LOG_ERROR, "Color space %s is not supported.\n", av_color_space_name(avctx->colorspace));
1011             return -1;
1012     }
1013
1014     return 0;
1015 }
1016
1017 static int vtenc_create_encoder(AVCodecContext   *avctx,
1018                                 CMVideoCodecType codec_type,
1019                                 CFStringRef      profile_level,
1020                                 CFNumberRef      gamma_level,
1021                                 CFDictionaryRef  enc_info,
1022                                 CFDictionaryRef  pixel_buffer_info,
1023                                 VTCompressionSessionRef *session)
1024 {
1025     VTEncContext *vtctx = avctx->priv_data;
1026     SInt32       bit_rate = avctx->bit_rate;
1027     SInt32       max_rate = avctx->rc_max_rate;
1028     CFNumberRef  bit_rate_num;
1029     CFNumberRef  bytes_per_second;
1030     CFNumberRef  one_second;
1031     CFArrayRef   data_rate_limits;
1032     int64_t      bytes_per_second_value = 0;
1033     int64_t      one_second_value = 0;
1034     void         *nums[2];
1035
1036     int status = VTCompressionSessionCreate(kCFAllocatorDefault,
1037                                             avctx->width,
1038                                             avctx->height,
1039                                             codec_type,
1040                                             enc_info,
1041                                             pixel_buffer_info,
1042                                             kCFAllocatorDefault,
1043                                             vtenc_output_callback,
1044                                             avctx,
1045                                             session);
1046
1047     if (status || !vtctx->session) {
1048         av_log(avctx, AV_LOG_ERROR, "Error: cannot create compression session: %d\n", status);
1049
1050 #if !TARGET_OS_IPHONE
1051         if (!vtctx->allow_sw) {
1052             av_log(avctx, AV_LOG_ERROR, "Try -allow_sw 1. The hardware encoder may be busy, or not supported.\n");
1053         }
1054 #endif
1055
1056         return AVERROR_EXTERNAL;
1057     }
1058
1059     bit_rate_num = CFNumberCreate(kCFAllocatorDefault,
1060                                   kCFNumberSInt32Type,
1061                                   &bit_rate);
1062     if (!bit_rate_num) return AVERROR(ENOMEM);
1063
1064     status = VTSessionSetProperty(vtctx->session,
1065                                   kVTCompressionPropertyKey_AverageBitRate,
1066                                   bit_rate_num);
1067     CFRelease(bit_rate_num);
1068
1069     if (status) {
1070         av_log(avctx, AV_LOG_ERROR, "Error setting bitrate property: %d\n", status);
1071         return AVERROR_EXTERNAL;
1072     }
1073
1074     if (vtctx->codec_id == AV_CODEC_ID_H264 && max_rate > 0) {
1075         // kVTCompressionPropertyKey_DataRateLimits is not available for HEVC
1076         bytes_per_second_value = max_rate >> 3;
1077         bytes_per_second = CFNumberCreate(kCFAllocatorDefault,
1078                                           kCFNumberSInt64Type,
1079                                           &bytes_per_second_value);
1080         if (!bytes_per_second) {
1081             return AVERROR(ENOMEM);
1082         }
1083         one_second_value = 1;
1084         one_second = CFNumberCreate(kCFAllocatorDefault,
1085                                     kCFNumberSInt64Type,
1086                                     &one_second_value);
1087         if (!one_second) {
1088             CFRelease(bytes_per_second);
1089             return AVERROR(ENOMEM);
1090         }
1091         nums[0] = (void *)bytes_per_second;
1092         nums[1] = (void *)one_second;
1093         data_rate_limits = CFArrayCreate(kCFAllocatorDefault,
1094                                          (const void **)nums,
1095                                          2,
1096                                          &kCFTypeArrayCallBacks);
1097
1098         if (!data_rate_limits) {
1099             CFRelease(bytes_per_second);
1100             CFRelease(one_second);
1101             return AVERROR(ENOMEM);
1102         }
1103         status = VTSessionSetProperty(vtctx->session,
1104                                       kVTCompressionPropertyKey_DataRateLimits,
1105                                       data_rate_limits);
1106
1107         CFRelease(bytes_per_second);
1108         CFRelease(one_second);
1109         CFRelease(data_rate_limits);
1110
1111         if (status) {
1112             av_log(avctx, AV_LOG_ERROR, "Error setting max bitrate property: %d\n", status);
1113             return AVERROR_EXTERNAL;
1114         }
1115     }
1116
1117     if (profile_level) {
1118         status = VTSessionSetProperty(vtctx->session,
1119                                       kVTCompressionPropertyKey_ProfileLevel,
1120                                       profile_level);
1121         if (status) {
1122             av_log(avctx, AV_LOG_ERROR, "Error setting profile/level property: %d. Output will be encoded using a supported profile/level combination.\n", status);
1123         }
1124     }
1125
1126     if (avctx->gop_size > 0) {
1127         CFNumberRef interval = CFNumberCreate(kCFAllocatorDefault,
1128                                               kCFNumberIntType,
1129                                               &avctx->gop_size);
1130         if (!interval) {
1131             return AVERROR(ENOMEM);
1132         }
1133
1134         status = VTSessionSetProperty(vtctx->session,
1135                                       kVTCompressionPropertyKey_MaxKeyFrameInterval,
1136                                       interval);
1137         CFRelease(interval);
1138
1139         if (status) {
1140             av_log(avctx, AV_LOG_ERROR, "Error setting 'max key-frame interval' property: %d\n", status);
1141             return AVERROR_EXTERNAL;
1142         }
1143     }
1144
1145     if (vtctx->frames_before) {
1146         status = VTSessionSetProperty(vtctx->session,
1147                                       kVTCompressionPropertyKey_MoreFramesBeforeStart,
1148                                       kCFBooleanTrue);
1149
1150         if (status == kVTPropertyNotSupportedErr) {
1151             av_log(avctx, AV_LOG_WARNING, "frames_before property is not supported on this device. Ignoring.\n");
1152         } else if (status) {
1153             av_log(avctx, AV_LOG_ERROR, "Error setting frames_before property: %d\n", status);
1154         }
1155     }
1156
1157     if (vtctx->frames_after) {
1158         status = VTSessionSetProperty(vtctx->session,
1159                                       kVTCompressionPropertyKey_MoreFramesAfterEnd,
1160                                       kCFBooleanTrue);
1161
1162         if (status == kVTPropertyNotSupportedErr) {
1163             av_log(avctx, AV_LOG_WARNING, "frames_after property is not supported on this device. Ignoring.\n");
1164         } else if (status) {
1165             av_log(avctx, AV_LOG_ERROR, "Error setting frames_after property: %d\n", status);
1166         }
1167     }
1168
1169     if (avctx->sample_aspect_ratio.num != 0) {
1170         CFNumberRef num;
1171         CFNumberRef den;
1172         CFMutableDictionaryRef par;
1173         AVRational *avpar = &avctx->sample_aspect_ratio;
1174
1175         av_reduce(&avpar->num, &avpar->den,
1176                    avpar->num,  avpar->den,
1177                   0xFFFFFFFF);
1178
1179         num = CFNumberCreate(kCFAllocatorDefault,
1180                              kCFNumberIntType,
1181                              &avpar->num);
1182
1183         den = CFNumberCreate(kCFAllocatorDefault,
1184                              kCFNumberIntType,
1185                              &avpar->den);
1186
1187
1188
1189         par = CFDictionaryCreateMutable(kCFAllocatorDefault,
1190                                         2,
1191                                         &kCFCopyStringDictionaryKeyCallBacks,
1192                                         &kCFTypeDictionaryValueCallBacks);
1193
1194         if (!par || !num || !den) {
1195             if (par) CFRelease(par);
1196             if (num) CFRelease(num);
1197             if (den) CFRelease(den);
1198
1199             return AVERROR(ENOMEM);
1200         }
1201
1202         CFDictionarySetValue(
1203             par,
1204             kCMFormatDescriptionKey_PixelAspectRatioHorizontalSpacing,
1205             num);
1206
1207         CFDictionarySetValue(
1208             par,
1209             kCMFormatDescriptionKey_PixelAspectRatioVerticalSpacing,
1210             den);
1211
1212         status = VTSessionSetProperty(vtctx->session,
1213                                       kVTCompressionPropertyKey_PixelAspectRatio,
1214                                       par);
1215
1216         CFRelease(par);
1217         CFRelease(num);
1218         CFRelease(den);
1219
1220         if (status) {
1221             av_log(avctx,
1222                    AV_LOG_ERROR,
1223                    "Error setting pixel aspect ratio to %d:%d: %d.\n",
1224                    avctx->sample_aspect_ratio.num,
1225                    avctx->sample_aspect_ratio.den,
1226                    status);
1227
1228             return AVERROR_EXTERNAL;
1229         }
1230     }
1231
1232
1233     if (vtctx->transfer_function) {
1234         status = VTSessionSetProperty(vtctx->session,
1235                                       kVTCompressionPropertyKey_TransferFunction,
1236                                       vtctx->transfer_function);
1237
1238         if (status) {
1239             av_log(avctx, AV_LOG_WARNING, "Could not set transfer function: %d\n", status);
1240         }
1241     }
1242
1243
1244     if (vtctx->ycbcr_matrix) {
1245         status = VTSessionSetProperty(vtctx->session,
1246                                       kVTCompressionPropertyKey_YCbCrMatrix,
1247                                       vtctx->ycbcr_matrix);
1248
1249         if (status) {
1250             av_log(avctx, AV_LOG_WARNING, "Could not set ycbcr matrix: %d\n", status);
1251         }
1252     }
1253
1254
1255     if (vtctx->color_primaries) {
1256         status = VTSessionSetProperty(vtctx->session,
1257                                       kVTCompressionPropertyKey_ColorPrimaries,
1258                                       vtctx->color_primaries);
1259
1260         if (status) {
1261             av_log(avctx, AV_LOG_WARNING, "Could not set color primaries: %d\n", status);
1262         }
1263     }
1264
1265     if (gamma_level) {
1266         status = VTSessionSetProperty(vtctx->session,
1267                                       kCVImageBufferGammaLevelKey,
1268                                       gamma_level);
1269
1270         if (status) {
1271             av_log(avctx, AV_LOG_WARNING, "Could not set gamma level: %d\n", status);
1272         }
1273     }
1274
1275     if (!vtctx->has_b_frames) {
1276         status = VTSessionSetProperty(vtctx->session,
1277                                       kVTCompressionPropertyKey_AllowFrameReordering,
1278                                       kCFBooleanFalse);
1279
1280         if (status) {
1281             av_log(avctx, AV_LOG_ERROR, "Error setting 'allow frame reordering' property: %d\n", status);
1282             return AVERROR_EXTERNAL;
1283         }
1284     }
1285
1286     if (vtctx->entropy != VT_ENTROPY_NOT_SET) {
1287         CFStringRef entropy = vtctx->entropy == VT_CABAC ?
1288                                 compat_keys.kVTH264EntropyMode_CABAC:
1289                                 compat_keys.kVTH264EntropyMode_CAVLC;
1290
1291         status = VTSessionSetProperty(vtctx->session,
1292                                       compat_keys.kVTCompressionPropertyKey_H264EntropyMode,
1293                                       entropy);
1294
1295         if (status) {
1296             av_log(avctx, AV_LOG_ERROR, "Error setting entropy property: %d\n", status);
1297         }
1298     }
1299
1300     if (vtctx->realtime) {
1301         status = VTSessionSetProperty(vtctx->session,
1302                                       compat_keys.kVTCompressionPropertyKey_RealTime,
1303                                       kCFBooleanTrue);
1304
1305         if (status) {
1306             av_log(avctx, AV_LOG_ERROR, "Error setting realtime property: %d\n", status);
1307         }
1308     }
1309
1310     status = VTCompressionSessionPrepareToEncodeFrames(vtctx->session);
1311     if (status) {
1312         av_log(avctx, AV_LOG_ERROR, "Error: cannot prepare encoder: %d\n", status);
1313         return AVERROR_EXTERNAL;
1314     }
1315
1316     return 0;
1317 }
1318
1319 static int vtenc_configure_encoder(AVCodecContext *avctx)
1320 {
1321     CFMutableDictionaryRef enc_info;
1322     CFMutableDictionaryRef pixel_buffer_info;
1323     CMVideoCodecType       codec_type;
1324     VTEncContext           *vtctx = avctx->priv_data;
1325     CFStringRef            profile_level;
1326     CFNumberRef            gamma_level = NULL;
1327     int                    status;
1328
1329     codec_type = get_cm_codec_type(avctx->codec_id);
1330     if (!codec_type) {
1331         av_log(avctx, AV_LOG_ERROR, "Error: no mapping for AVCodecID %d\n", avctx->codec_id);
1332         return AVERROR(EINVAL);
1333     }
1334
1335     vtctx->codec_id = avctx->codec_id;
1336
1337     if (vtctx->codec_id == AV_CODEC_ID_H264) {
1338         vtctx->get_param_set_func = CMVideoFormatDescriptionGetH264ParameterSetAtIndex;
1339
1340         vtctx->has_b_frames = avctx->max_b_frames > 0;
1341         if(vtctx->has_b_frames && vtctx->profile == H264_PROF_BASELINE){
1342             av_log(avctx, AV_LOG_WARNING, "Cannot use B-frames with baseline profile. Output will not contain B-frames.\n");
1343             vtctx->has_b_frames = false;
1344         }
1345
1346         if (vtctx->entropy == VT_CABAC && vtctx->profile == H264_PROF_BASELINE) {
1347             av_log(avctx, AV_LOG_WARNING, "CABAC entropy requires 'main' or 'high' profile, but baseline was requested. Encode will not use CABAC entropy.\n");
1348             vtctx->entropy = VT_ENTROPY_NOT_SET;
1349         }
1350
1351         if (!get_vt_h264_profile_level(avctx, &profile_level)) return AVERROR(EINVAL);
1352     } else {
1353         vtctx->get_param_set_func = compat_keys.CMVideoFormatDescriptionGetHEVCParameterSetAtIndex;
1354         if (!vtctx->get_param_set_func) return AVERROR(EINVAL);
1355         if (!get_vt_hevc_profile_level(avctx, &profile_level)) return AVERROR(EINVAL);
1356     }
1357
1358     enc_info = CFDictionaryCreateMutable(
1359         kCFAllocatorDefault,
1360         20,
1361         &kCFCopyStringDictionaryKeyCallBacks,
1362         &kCFTypeDictionaryValueCallBacks
1363     );
1364
1365     if (!enc_info) return AVERROR(ENOMEM);
1366
1367 #if !TARGET_OS_IPHONE
1368     if(vtctx->require_sw) {
1369         CFDictionarySetValue(enc_info,
1370                              compat_keys.kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder,
1371                              kCFBooleanFalse);
1372     } else if (!vtctx->allow_sw) {
1373         CFDictionarySetValue(enc_info,
1374                              compat_keys.kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder,
1375                              kCFBooleanTrue);
1376     } else {
1377         CFDictionarySetValue(enc_info,
1378                              compat_keys.kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder,
1379                              kCFBooleanTrue);
1380     }
1381 #endif
1382
1383     if (avctx->pix_fmt != AV_PIX_FMT_VIDEOTOOLBOX) {
1384         status = create_cv_pixel_buffer_info(avctx, &pixel_buffer_info);
1385         if (status)
1386             goto init_cleanup;
1387     } else {
1388         pixel_buffer_info = NULL;
1389     }
1390
1391     vtctx->dts_delta = vtctx->has_b_frames ? -1 : 0;
1392
1393     get_cv_transfer_function(avctx, &vtctx->transfer_function, &gamma_level);
1394     get_cv_ycbcr_matrix(avctx, &vtctx->ycbcr_matrix);
1395     get_cv_color_primaries(avctx, &vtctx->color_primaries);
1396
1397
1398     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
1399         status = vtenc_populate_extradata(avctx,
1400                                           codec_type,
1401                                           profile_level,
1402                                           gamma_level,
1403                                           enc_info,
1404                                           pixel_buffer_info);
1405         if (status)
1406             goto init_cleanup;
1407     }
1408
1409     status = vtenc_create_encoder(avctx,
1410                                   codec_type,
1411                                   profile_level,
1412                                   gamma_level,
1413                                   enc_info,
1414                                   pixel_buffer_info,
1415                                   &vtctx->session);
1416
1417 init_cleanup:
1418     if (gamma_level)
1419         CFRelease(gamma_level);
1420
1421     if (pixel_buffer_info)
1422         CFRelease(pixel_buffer_info);
1423
1424     CFRelease(enc_info);
1425
1426     return status;
1427 }
1428
1429 static av_cold int vtenc_init(AVCodecContext *avctx)
1430 {
1431     VTEncContext    *vtctx = avctx->priv_data;
1432     CFBooleanRef    has_b_frames_cfbool;
1433     int             status;
1434
1435     pthread_once(&once_ctrl, loadVTEncSymbols);
1436
1437     pthread_mutex_init(&vtctx->lock, NULL);
1438     pthread_cond_init(&vtctx->cv_sample_sent, NULL);
1439
1440     vtctx->session = NULL;
1441     status = vtenc_configure_encoder(avctx);
1442     if (status) return status;
1443
1444     status = VTSessionCopyProperty(vtctx->session,
1445                                    kVTCompressionPropertyKey_AllowFrameReordering,
1446                                    kCFAllocatorDefault,
1447                                    &has_b_frames_cfbool);
1448
1449     if (!status && has_b_frames_cfbool) {
1450         //Some devices don't output B-frames for main profile, even if requested.
1451         vtctx->has_b_frames = CFBooleanGetValue(has_b_frames_cfbool);
1452         CFRelease(has_b_frames_cfbool);
1453     }
1454     avctx->has_b_frames = vtctx->has_b_frames;
1455
1456     return 0;
1457 }
1458
1459 static void vtenc_get_frame_info(CMSampleBufferRef buffer, bool *is_key_frame)
1460 {
1461     CFArrayRef      attachments;
1462     CFDictionaryRef attachment;
1463     CFBooleanRef    not_sync;
1464     CFIndex         len;
1465
1466     attachments = CMSampleBufferGetSampleAttachmentsArray(buffer, false);
1467     len = !attachments ? 0 : CFArrayGetCount(attachments);
1468
1469     if (!len) {
1470         *is_key_frame = true;
1471         return;
1472     }
1473
1474     attachment = CFArrayGetValueAtIndex(attachments, 0);
1475
1476     if (CFDictionaryGetValueIfPresent(attachment,
1477                                       kCMSampleAttachmentKey_NotSync,
1478                                       (const void **)&not_sync))
1479     {
1480         *is_key_frame = !CFBooleanGetValue(not_sync);
1481     } else {
1482         *is_key_frame = true;
1483     }
1484 }
1485
1486 static int is_post_sei_nal_type(int nal_type){
1487     return nal_type != H264_NAL_SEI &&
1488            nal_type != H264_NAL_SPS &&
1489            nal_type != H264_NAL_PPS &&
1490            nal_type != H264_NAL_AUD;
1491 }
1492
1493 /*
1494  * Finds the sei message start/size of type find_sei_type.
1495  * If more than one of that type exists, the last one is returned.
1496  */
1497 static int find_sei_end(AVCodecContext *avctx,
1498                         uint8_t        *nal_data,
1499                         size_t          nal_size,
1500                         uint8_t       **sei_end)
1501 {
1502     int nal_type;
1503     size_t sei_payload_size = 0;
1504     int sei_payload_type = 0;
1505     *sei_end = NULL;
1506     uint8_t *nal_start = nal_data;
1507
1508     if (!nal_size)
1509         return 0;
1510
1511     nal_type = *nal_data & 0x1F;
1512     if (nal_type != H264_NAL_SEI)
1513         return 0;
1514
1515     nal_data++;
1516     nal_size--;
1517
1518     if (nal_data[nal_size - 1] == 0x80)
1519         nal_size--;
1520
1521     while (nal_size > 0 && *nal_data > 0) {
1522         do{
1523             sei_payload_type += *nal_data;
1524             nal_data++;
1525             nal_size--;
1526         } while (nal_size > 0 && *nal_data == 0xFF);
1527
1528         if (!nal_size) {
1529             av_log(avctx, AV_LOG_ERROR, "Unexpected end of SEI NAL Unit parsing type.\n");
1530             return AVERROR_INVALIDDATA;
1531         }
1532
1533         do{
1534             sei_payload_size += *nal_data;
1535             nal_data++;
1536             nal_size--;
1537         } while (nal_size > 0 && *nal_data == 0xFF);
1538
1539         if (nal_size < sei_payload_size) {
1540             av_log(avctx, AV_LOG_ERROR, "Unexpected end of SEI NAL Unit parsing size.\n");
1541             return AVERROR_INVALIDDATA;
1542         }
1543
1544         nal_data += sei_payload_size;
1545         nal_size -= sei_payload_size;
1546     }
1547
1548     *sei_end = nal_data;
1549
1550     return nal_data - nal_start + 1;
1551 }
1552
1553 /**
1554  * Copies the data inserting emulation prevention bytes as needed.
1555  * Existing data in the destination can be taken into account by providing
1556  * dst with a dst_offset > 0.
1557  *
1558  * @return The number of bytes copied on success. On failure, the negative of
1559  *         the number of bytes needed to copy src is returned.
1560  */
1561 static int copy_emulation_prev(const uint8_t *src,
1562                                size_t         src_size,
1563                                uint8_t       *dst,
1564                                ssize_t        dst_offset,
1565                                size_t         dst_size)
1566 {
1567     int zeros = 0;
1568     int wrote_bytes;
1569     uint8_t* dst_start;
1570     uint8_t* dst_end = dst + dst_size;
1571     const uint8_t* src_end = src + src_size;
1572     int start_at = dst_offset > 2 ? dst_offset - 2 : 0;
1573     int i;
1574     for (i = start_at; i < dst_offset && i < dst_size; i++) {
1575         if (!dst[i])
1576             zeros++;
1577         else
1578             zeros = 0;
1579     }
1580
1581     dst += dst_offset;
1582     dst_start = dst;
1583     for (; src < src_end; src++, dst++) {
1584         if (zeros == 2) {
1585             int insert_ep3_byte = *src <= 3;
1586             if (insert_ep3_byte) {
1587                 if (dst < dst_end)
1588                     *dst = 3;
1589                 dst++;
1590             }
1591
1592             zeros = 0;
1593         }
1594
1595         if (dst < dst_end)
1596             *dst = *src;
1597
1598         if (!*src)
1599             zeros++;
1600         else
1601             zeros = 0;
1602     }
1603
1604     wrote_bytes = dst - dst_start;
1605
1606     if (dst > dst_end)
1607         return -wrote_bytes;
1608
1609     return wrote_bytes;
1610 }
1611
1612 static int write_sei(const ExtraSEI *sei,
1613                      int             sei_type,
1614                      uint8_t        *dst,
1615                      size_t          dst_size)
1616 {
1617     uint8_t *sei_start = dst;
1618     size_t remaining_sei_size = sei->size;
1619     size_t remaining_dst_size = dst_size;
1620     int header_bytes;
1621     int bytes_written;
1622     ssize_t offset;
1623
1624     if (!remaining_dst_size)
1625         return AVERROR_BUFFER_TOO_SMALL;
1626
1627     while (sei_type && remaining_dst_size != 0) {
1628         int sei_byte = sei_type > 255 ? 255 : sei_type;
1629         *dst = sei_byte;
1630
1631         sei_type -= sei_byte;
1632         dst++;
1633         remaining_dst_size--;
1634     }
1635
1636     if (!dst_size)
1637         return AVERROR_BUFFER_TOO_SMALL;
1638
1639     while (remaining_sei_size && remaining_dst_size != 0) {
1640         int size_byte = remaining_sei_size > 255 ? 255 : remaining_sei_size;
1641         *dst = size_byte;
1642
1643         remaining_sei_size -= size_byte;
1644         dst++;
1645         remaining_dst_size--;
1646     }
1647
1648     if (remaining_dst_size < sei->size)
1649         return AVERROR_BUFFER_TOO_SMALL;
1650
1651     header_bytes = dst - sei_start;
1652
1653     offset = header_bytes;
1654     bytes_written = copy_emulation_prev(sei->data,
1655                                         sei->size,
1656                                         sei_start,
1657                                         offset,
1658                                         dst_size);
1659     if (bytes_written < 0)
1660         return AVERROR_BUFFER_TOO_SMALL;
1661
1662     bytes_written += header_bytes;
1663     return bytes_written;
1664 }
1665
1666 /**
1667  * Copies NAL units and replaces length codes with
1668  * H.264 Annex B start codes. On failure, the contents of
1669  * dst_data may have been modified.
1670  *
1671  * @param length_code_size Byte length of each length code
1672  * @param sample_buffer NAL units prefixed with length codes.
1673  * @param sei Optional A53 closed captions SEI data.
1674  * @param dst_data Must be zeroed before calling this function.
1675  *                 Contains the copied NAL units prefixed with
1676  *                 start codes when the function returns
1677  *                 successfully.
1678  * @param dst_size Length of dst_data
1679  * @return 0 on success
1680  *         AVERROR_INVALIDDATA if length_code_size is invalid
1681  *         AVERROR_BUFFER_TOO_SMALL if dst_data is too small
1682  *         or if a length_code in src_data specifies data beyond
1683  *         the end of its buffer.
1684  */
1685 static int copy_replace_length_codes(
1686     AVCodecContext *avctx,
1687     size_t        length_code_size,
1688     CMSampleBufferRef sample_buffer,
1689     ExtraSEI      *sei,
1690     uint8_t       *dst_data,
1691     size_t        dst_size)
1692 {
1693     size_t src_size = CMSampleBufferGetTotalSampleSize(sample_buffer);
1694     size_t remaining_src_size = src_size;
1695     size_t remaining_dst_size = dst_size;
1696     size_t src_offset = 0;
1697     int wrote_sei = 0;
1698     int status;
1699     uint8_t size_buf[4];
1700     uint8_t nal_type;
1701     CMBlockBufferRef block = CMSampleBufferGetDataBuffer(sample_buffer);
1702
1703     if (length_code_size > 4) {
1704         return AVERROR_INVALIDDATA;
1705     }
1706
1707     while (remaining_src_size > 0) {
1708         size_t curr_src_len;
1709         size_t curr_dst_len;
1710         size_t box_len = 0;
1711         size_t i;
1712
1713         uint8_t       *dst_box;
1714
1715         status = CMBlockBufferCopyDataBytes(block,
1716                                             src_offset,
1717                                             length_code_size,
1718                                             size_buf);
1719         if (status) {
1720             av_log(avctx, AV_LOG_ERROR, "Cannot copy length: %d\n", status);
1721             return AVERROR_EXTERNAL;
1722         }
1723
1724         status = CMBlockBufferCopyDataBytes(block,
1725                                             src_offset + length_code_size,
1726                                             1,
1727                                             &nal_type);
1728
1729         if (status) {
1730             av_log(avctx, AV_LOG_ERROR, "Cannot copy type: %d\n", status);
1731             return AVERROR_EXTERNAL;
1732         }
1733
1734         nal_type &= 0x1F;
1735
1736         for (i = 0; i < length_code_size; i++) {
1737             box_len <<= 8;
1738             box_len |= size_buf[i];
1739         }
1740
1741         if (sei && !wrote_sei && is_post_sei_nal_type(nal_type)) {
1742             //No SEI NAL unit - insert.
1743             int wrote_bytes;
1744
1745             memcpy(dst_data, start_code, sizeof(start_code));
1746             dst_data += sizeof(start_code);
1747             remaining_dst_size -= sizeof(start_code);
1748
1749             *dst_data = H264_NAL_SEI;
1750             dst_data++;
1751             remaining_dst_size--;
1752
1753             wrote_bytes = write_sei(sei,
1754                                     H264_SEI_TYPE_USER_DATA_REGISTERED,
1755                                     dst_data,
1756                                     remaining_dst_size);
1757
1758             if (wrote_bytes < 0)
1759                 return wrote_bytes;
1760
1761             remaining_dst_size -= wrote_bytes;
1762             dst_data += wrote_bytes;
1763
1764             if (remaining_dst_size <= 0)
1765                 return AVERROR_BUFFER_TOO_SMALL;
1766
1767             *dst_data = 0x80;
1768
1769             dst_data++;
1770             remaining_dst_size--;
1771
1772             wrote_sei = 1;
1773         }
1774
1775         curr_src_len = box_len + length_code_size;
1776         curr_dst_len = box_len + sizeof(start_code);
1777
1778         if (remaining_src_size < curr_src_len) {
1779             return AVERROR_BUFFER_TOO_SMALL;
1780         }
1781
1782         if (remaining_dst_size < curr_dst_len) {
1783             return AVERROR_BUFFER_TOO_SMALL;
1784         }
1785
1786         dst_box = dst_data + sizeof(start_code);
1787
1788         memcpy(dst_data, start_code, sizeof(start_code));
1789         status = CMBlockBufferCopyDataBytes(block,
1790                                             src_offset + length_code_size,
1791                                             box_len,
1792                                             dst_box);
1793
1794         if (status) {
1795             av_log(avctx, AV_LOG_ERROR, "Cannot copy data: %d\n", status);
1796             return AVERROR_EXTERNAL;
1797         }
1798
1799         if (sei && !wrote_sei && nal_type == H264_NAL_SEI) {
1800             //Found SEI NAL unit - append.
1801             int wrote_bytes;
1802             int old_sei_length;
1803             int extra_bytes;
1804             uint8_t *new_sei;
1805             old_sei_length = find_sei_end(avctx, dst_box, box_len, &new_sei);
1806             if (old_sei_length < 0)
1807                 return status;
1808
1809             wrote_bytes = write_sei(sei,
1810                                     H264_SEI_TYPE_USER_DATA_REGISTERED,
1811                                     new_sei,
1812                                     remaining_dst_size - old_sei_length);
1813             if (wrote_bytes < 0)
1814                 return wrote_bytes;
1815
1816             if (new_sei + wrote_bytes >= dst_data + remaining_dst_size)
1817                 return AVERROR_BUFFER_TOO_SMALL;
1818
1819             new_sei[wrote_bytes++] = 0x80;
1820             extra_bytes = wrote_bytes - (dst_box + box_len - new_sei);
1821
1822             dst_data += extra_bytes;
1823             remaining_dst_size -= extra_bytes;
1824
1825             wrote_sei = 1;
1826         }
1827
1828         src_offset += curr_src_len;
1829         dst_data += curr_dst_len;
1830
1831         remaining_src_size -= curr_src_len;
1832         remaining_dst_size -= curr_dst_len;
1833     }
1834
1835     return 0;
1836 }
1837
1838 /**
1839  * Returns a sufficient number of bytes to contain the sei data.
1840  * It may be greater than the minimum required.
1841  */
1842 static int get_sei_msg_bytes(const ExtraSEI* sei, int type){
1843     int copied_size;
1844     if (sei->size == 0)
1845         return 0;
1846
1847     copied_size = -copy_emulation_prev(sei->data,
1848                                        sei->size,
1849                                        NULL,
1850                                        0,
1851                                        0);
1852
1853     if ((sei->size % 255) == 0) //may result in an extra byte
1854         copied_size++;
1855
1856     return copied_size + sei->size / 255 + 1 + type / 255 + 1;
1857 }
1858
1859 static int vtenc_cm_to_avpacket(
1860     AVCodecContext    *avctx,
1861     CMSampleBufferRef sample_buffer,
1862     AVPacket          *pkt,
1863     ExtraSEI          *sei)
1864 {
1865     VTEncContext *vtctx = avctx->priv_data;
1866
1867     int     status;
1868     bool    is_key_frame;
1869     bool    add_header;
1870     size_t  length_code_size;
1871     size_t  header_size = 0;
1872     size_t  in_buf_size;
1873     size_t  out_buf_size;
1874     size_t  sei_nalu_size = 0;
1875     int64_t dts_delta;
1876     int64_t time_base_num;
1877     int nalu_count;
1878     CMTime  pts;
1879     CMTime  dts;
1880     CMVideoFormatDescriptionRef vid_fmt;
1881
1882
1883     vtenc_get_frame_info(sample_buffer, &is_key_frame);
1884     status = get_length_code_size(avctx, sample_buffer, &length_code_size);
1885     if (status) return status;
1886
1887     add_header = is_key_frame && !(avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER);
1888
1889     if (add_header) {
1890         vid_fmt = CMSampleBufferGetFormatDescription(sample_buffer);
1891         if (!vid_fmt) {
1892             av_log(avctx, AV_LOG_ERROR, "Cannot get format description.\n");
1893             return AVERROR_EXTERNAL;
1894         }
1895
1896         int status = get_params_size(avctx, vid_fmt, &header_size);
1897         if (status) return status;
1898     }
1899
1900     status = count_nalus(length_code_size, sample_buffer, &nalu_count);
1901     if(status)
1902         return status;
1903
1904     if (sei) {
1905         size_t msg_size = get_sei_msg_bytes(sei,
1906                                             H264_SEI_TYPE_USER_DATA_REGISTERED);
1907
1908         sei_nalu_size = sizeof(start_code) + 1 + msg_size + 1;
1909     }
1910
1911     in_buf_size = CMSampleBufferGetTotalSampleSize(sample_buffer);
1912     out_buf_size = header_size +
1913                    in_buf_size +
1914                    sei_nalu_size +
1915                    nalu_count * ((int)sizeof(start_code) - (int)length_code_size);
1916
1917     status = ff_alloc_packet2(avctx, pkt, out_buf_size, out_buf_size);
1918     if (status < 0)
1919         return status;
1920
1921     if (add_header) {
1922         status = copy_param_sets(avctx, vid_fmt, pkt->data, out_buf_size);
1923         if(status) return status;
1924     }
1925
1926     status = copy_replace_length_codes(
1927         avctx,
1928         length_code_size,
1929         sample_buffer,
1930         sei,
1931         pkt->data + header_size,
1932         pkt->size - header_size
1933     );
1934
1935     if (status) {
1936         av_log(avctx, AV_LOG_ERROR, "Error copying packet data: %d\n", status);
1937         return status;
1938     }
1939
1940     if (is_key_frame) {
1941         pkt->flags |= AV_PKT_FLAG_KEY;
1942     }
1943
1944     pts = CMSampleBufferGetPresentationTimeStamp(sample_buffer);
1945     dts = CMSampleBufferGetDecodeTimeStamp      (sample_buffer);
1946
1947     if (CMTIME_IS_INVALID(dts)) {
1948         if (!vtctx->has_b_frames) {
1949             dts = pts;
1950         } else {
1951             av_log(avctx, AV_LOG_ERROR, "DTS is invalid.\n");
1952             return AVERROR_EXTERNAL;
1953         }
1954     }
1955
1956     dts_delta = vtctx->dts_delta >= 0 ? vtctx->dts_delta : 0;
1957     time_base_num = avctx->time_base.num;
1958     pkt->pts = pts.value / time_base_num;
1959     pkt->dts = dts.value / time_base_num - dts_delta;
1960     pkt->size = out_buf_size;
1961
1962     return 0;
1963 }
1964
1965 /*
1966  * contiguous_buf_size is 0 if not contiguous, and the size of the buffer
1967  * containing all planes if so.
1968  */
1969 static int get_cv_pixel_info(
1970     AVCodecContext *avctx,
1971     const AVFrame  *frame,
1972     int            *color,
1973     int            *plane_count,
1974     size_t         *widths,
1975     size_t         *heights,
1976     size_t         *strides,
1977     size_t         *contiguous_buf_size)
1978 {
1979     VTEncContext *vtctx = avctx->priv_data;
1980     int av_format       = frame->format;
1981     int av_color_range  = frame->color_range;
1982     int i;
1983     int range_guessed;
1984     int status;
1985
1986     status = get_cv_pixel_format(avctx, av_format, av_color_range, color, &range_guessed);
1987     if (status) {
1988         av_log(avctx,
1989             AV_LOG_ERROR,
1990             "Could not get pixel format for color format '%s' range '%s'.\n",
1991             av_get_pix_fmt_name(av_format),
1992             av_color_range > AVCOL_RANGE_UNSPECIFIED &&
1993             av_color_range < AVCOL_RANGE_NB ?
1994                av_color_range_name(av_color_range) :
1995                "Unknown");
1996
1997         return AVERROR(EINVAL);
1998     }
1999
2000     if (range_guessed) {
2001         if (!vtctx->warned_color_range) {
2002             vtctx->warned_color_range = true;
2003             av_log(avctx,
2004                    AV_LOG_WARNING,
2005                    "Color range not set for %s. Using MPEG range.\n",
2006                    av_get_pix_fmt_name(av_format));
2007         }
2008     }
2009
2010     switch (av_format) {
2011     case AV_PIX_FMT_NV12:
2012         *plane_count = 2;
2013
2014         widths [0] = avctx->width;
2015         heights[0] = avctx->height;
2016         strides[0] = frame ? frame->linesize[0] : avctx->width;
2017
2018         widths [1] = (avctx->width  + 1) / 2;
2019         heights[1] = (avctx->height + 1) / 2;
2020         strides[1] = frame ? frame->linesize[1] : (avctx->width + 1) & -2;
2021         break;
2022
2023     case AV_PIX_FMT_YUV420P:
2024         *plane_count = 3;
2025
2026         widths [0] = avctx->width;
2027         heights[0] = avctx->height;
2028         strides[0] = frame ? frame->linesize[0] : avctx->width;
2029
2030         widths [1] = (avctx->width  + 1) / 2;
2031         heights[1] = (avctx->height + 1) / 2;
2032         strides[1] = frame ? frame->linesize[1] : (avctx->width + 1) / 2;
2033
2034         widths [2] = (avctx->width  + 1) / 2;
2035         heights[2] = (avctx->height + 1) / 2;
2036         strides[2] = frame ? frame->linesize[2] : (avctx->width + 1) / 2;
2037         break;
2038
2039     case AV_PIX_FMT_P010LE:
2040         *plane_count = 2;
2041         widths[0] = avctx->width;
2042         heights[0] = avctx->height;
2043         strides[0] = frame ? frame->linesize[0] : (avctx->width * 2 + 63) & -64;
2044
2045         widths[1] = (avctx->width + 1) / 2;
2046         heights[1] = (avctx->height + 1) / 2;
2047         strides[1] = frame ? frame->linesize[1] : ((avctx->width + 1) / 2 + 63) & -64;
2048         break;
2049
2050     default:
2051         av_log(
2052                avctx,
2053                AV_LOG_ERROR,
2054                "Could not get frame format info for color %d range %d.\n",
2055                av_format,
2056                av_color_range);
2057
2058         return AVERROR(EINVAL);
2059     }
2060
2061     *contiguous_buf_size = 0;
2062     for (i = 0; i < *plane_count; i++) {
2063         if (i < *plane_count - 1 &&
2064             frame->data[i] + strides[i] * heights[i] != frame->data[i + 1]) {
2065             *contiguous_buf_size = 0;
2066             break;
2067         }
2068
2069         *contiguous_buf_size += strides[i] * heights[i];
2070     }
2071
2072     return 0;
2073 }
2074
2075 //Not used on OSX - frame is never copied.
2076 static int copy_avframe_to_pixel_buffer(AVCodecContext   *avctx,
2077                                         const AVFrame    *frame,
2078                                         CVPixelBufferRef cv_img,
2079                                         const size_t     *plane_strides,
2080                                         const size_t     *plane_rows)
2081 {
2082     int i, j;
2083     size_t plane_count;
2084     int status;
2085     int rows;
2086     int src_stride;
2087     int dst_stride;
2088     uint8_t *src_addr;
2089     uint8_t *dst_addr;
2090     size_t copy_bytes;
2091
2092     status = CVPixelBufferLockBaseAddress(cv_img, 0);
2093     if (status) {
2094         av_log(
2095             avctx,
2096             AV_LOG_ERROR,
2097             "Error: Could not lock base address of CVPixelBuffer: %d.\n",
2098             status
2099         );
2100     }
2101
2102     if (CVPixelBufferIsPlanar(cv_img)) {
2103         plane_count = CVPixelBufferGetPlaneCount(cv_img);
2104         for (i = 0; frame->data[i]; i++) {
2105             if (i == plane_count) {
2106                 CVPixelBufferUnlockBaseAddress(cv_img, 0);
2107                 av_log(avctx,
2108                     AV_LOG_ERROR,
2109                     "Error: different number of planes in AVFrame and CVPixelBuffer.\n"
2110                 );
2111
2112                 return AVERROR_EXTERNAL;
2113             }
2114
2115             dst_addr = (uint8_t*)CVPixelBufferGetBaseAddressOfPlane(cv_img, i);
2116             src_addr = (uint8_t*)frame->data[i];
2117             dst_stride = CVPixelBufferGetBytesPerRowOfPlane(cv_img, i);
2118             src_stride = plane_strides[i];
2119             rows = plane_rows[i];
2120
2121             if (dst_stride == src_stride) {
2122                 memcpy(dst_addr, src_addr, src_stride * rows);
2123             } else {
2124                 copy_bytes = dst_stride < src_stride ? dst_stride : src_stride;
2125
2126                 for (j = 0; j < rows; j++) {
2127                     memcpy(dst_addr + j * dst_stride, src_addr + j * src_stride, copy_bytes);
2128                 }
2129             }
2130         }
2131     } else {
2132         if (frame->data[1]) {
2133             CVPixelBufferUnlockBaseAddress(cv_img, 0);
2134             av_log(avctx,
2135                 AV_LOG_ERROR,
2136                 "Error: different number of planes in AVFrame and non-planar CVPixelBuffer.\n"
2137             );
2138
2139             return AVERROR_EXTERNAL;
2140         }
2141
2142         dst_addr = (uint8_t*)CVPixelBufferGetBaseAddress(cv_img);
2143         src_addr = (uint8_t*)frame->data[0];
2144         dst_stride = CVPixelBufferGetBytesPerRow(cv_img);
2145         src_stride = plane_strides[0];
2146         rows = plane_rows[0];
2147
2148         if (dst_stride == src_stride) {
2149             memcpy(dst_addr, src_addr, src_stride * rows);
2150         } else {
2151             copy_bytes = dst_stride < src_stride ? dst_stride : src_stride;
2152
2153             for (j = 0; j < rows; j++) {
2154                 memcpy(dst_addr + j * dst_stride, src_addr + j * src_stride, copy_bytes);
2155             }
2156         }
2157     }
2158
2159     status = CVPixelBufferUnlockBaseAddress(cv_img, 0);
2160     if (status) {
2161         av_log(avctx, AV_LOG_ERROR, "Error: Could not unlock CVPixelBuffer base address: %d.\n", status);
2162         return AVERROR_EXTERNAL;
2163     }
2164
2165     return 0;
2166 }
2167
2168 static int create_cv_pixel_buffer(AVCodecContext   *avctx,
2169                                   const AVFrame    *frame,
2170                                   CVPixelBufferRef *cv_img)
2171 {
2172     int plane_count;
2173     int color;
2174     size_t widths [AV_NUM_DATA_POINTERS];
2175     size_t heights[AV_NUM_DATA_POINTERS];
2176     size_t strides[AV_NUM_DATA_POINTERS];
2177     int status;
2178     size_t contiguous_buf_size;
2179     CVPixelBufferPoolRef pix_buf_pool;
2180     VTEncContext* vtctx = avctx->priv_data;
2181
2182     if (avctx->pix_fmt == AV_PIX_FMT_VIDEOTOOLBOX) {
2183         av_assert0(frame->format == AV_PIX_FMT_VIDEOTOOLBOX);
2184
2185         *cv_img = (CVPixelBufferRef)frame->data[3];
2186         av_assert0(*cv_img);
2187
2188         CFRetain(*cv_img);
2189         return 0;
2190     }
2191
2192     memset(widths,  0, sizeof(widths));
2193     memset(heights, 0, sizeof(heights));
2194     memset(strides, 0, sizeof(strides));
2195
2196     status = get_cv_pixel_info(
2197         avctx,
2198         frame,
2199         &color,
2200         &plane_count,
2201         widths,
2202         heights,
2203         strides,
2204         &contiguous_buf_size
2205     );
2206
2207     if (status) {
2208         av_log(
2209             avctx,
2210             AV_LOG_ERROR,
2211             "Error: Cannot convert format %d color_range %d: %d\n",
2212             frame->format,
2213             frame->color_range,
2214             status
2215         );
2216
2217         return AVERROR_EXTERNAL;
2218     }
2219
2220     pix_buf_pool = VTCompressionSessionGetPixelBufferPool(vtctx->session);
2221     if (!pix_buf_pool) {
2222         /* On iOS, the VT session is invalidated when the APP switches from
2223          * foreground to background and vice versa. Fetch the actual error code
2224          * of the VT session to detect that case and restart the VT session
2225          * accordingly. */
2226         OSStatus vtstatus;
2227
2228         vtstatus = VTCompressionSessionPrepareToEncodeFrames(vtctx->session);
2229         if (vtstatus == kVTInvalidSessionErr) {
2230             CFRelease(vtctx->session);
2231             vtctx->session = NULL;
2232             status = vtenc_configure_encoder(avctx);
2233             if (status == 0)
2234                 pix_buf_pool = VTCompressionSessionGetPixelBufferPool(vtctx->session);
2235         }
2236         if (!pix_buf_pool) {
2237             av_log(avctx, AV_LOG_ERROR, "Could not get pixel buffer pool.\n");
2238             return AVERROR_EXTERNAL;
2239         }
2240         else
2241             av_log(avctx, AV_LOG_WARNING, "VT session restarted because of a "
2242                    "kVTInvalidSessionErr error.\n");
2243     }
2244
2245     status = CVPixelBufferPoolCreatePixelBuffer(NULL,
2246                                                 pix_buf_pool,
2247                                                 cv_img);
2248
2249
2250     if (status) {
2251         av_log(avctx, AV_LOG_ERROR, "Could not create pixel buffer from pool: %d.\n", status);
2252         return AVERROR_EXTERNAL;
2253     }
2254
2255     status = copy_avframe_to_pixel_buffer(avctx, frame, *cv_img, strides, heights);
2256     if (status) {
2257         CFRelease(*cv_img);
2258         *cv_img = NULL;
2259         return status;
2260     }
2261
2262     return 0;
2263 }
2264
2265 static int create_encoder_dict_h264(const AVFrame *frame,
2266                                     CFDictionaryRef* dict_out)
2267 {
2268     CFDictionaryRef dict = NULL;
2269     if (frame->pict_type == AV_PICTURE_TYPE_I) {
2270         const void *keys[] = { kVTEncodeFrameOptionKey_ForceKeyFrame };
2271         const void *vals[] = { kCFBooleanTrue };
2272
2273         dict = CFDictionaryCreate(NULL, keys, vals, 1, NULL, NULL);
2274         if(!dict) return AVERROR(ENOMEM);
2275     }
2276
2277     *dict_out = dict;
2278     return 0;
2279 }
2280
2281 static int vtenc_send_frame(AVCodecContext *avctx,
2282                             VTEncContext   *vtctx,
2283                             const AVFrame  *frame)
2284 {
2285     CMTime time;
2286     CFDictionaryRef frame_dict;
2287     CVPixelBufferRef cv_img = NULL;
2288     AVFrameSideData *side_data = NULL;
2289     ExtraSEI *sei = NULL;
2290     int status = create_cv_pixel_buffer(avctx, frame, &cv_img);
2291
2292     if (status) return status;
2293
2294     status = create_encoder_dict_h264(frame, &frame_dict);
2295     if (status) {
2296         CFRelease(cv_img);
2297         return status;
2298     }
2299
2300     side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_A53_CC);
2301     if (vtctx->a53_cc && side_data && side_data->size) {
2302         sei = av_mallocz(sizeof(*sei));
2303         if (!sei) {
2304             av_log(avctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
2305         } else {
2306             int ret = ff_alloc_a53_sei(frame, 0, &sei->data, &sei->size);
2307             if (ret < 0) {
2308                 av_log(avctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
2309                 av_free(sei);
2310                 sei = NULL;
2311             }
2312         }
2313     }
2314
2315     time = CMTimeMake(frame->pts * avctx->time_base.num, avctx->time_base.den);
2316     status = VTCompressionSessionEncodeFrame(
2317         vtctx->session,
2318         cv_img,
2319         time,
2320         kCMTimeInvalid,
2321         frame_dict,
2322         sei,
2323         NULL
2324     );
2325
2326     if (frame_dict) CFRelease(frame_dict);
2327     CFRelease(cv_img);
2328
2329     if (status) {
2330         av_log(avctx, AV_LOG_ERROR, "Error: cannot encode frame: %d\n", status);
2331         return AVERROR_EXTERNAL;
2332     }
2333
2334     return 0;
2335 }
2336
2337 static av_cold int vtenc_frame(
2338     AVCodecContext *avctx,
2339     AVPacket       *pkt,
2340     const AVFrame  *frame,
2341     int            *got_packet)
2342 {
2343     VTEncContext *vtctx = avctx->priv_data;
2344     bool get_frame;
2345     int status;
2346     CMSampleBufferRef buf = NULL;
2347     ExtraSEI *sei = NULL;
2348
2349     if (frame) {
2350         status = vtenc_send_frame(avctx, vtctx, frame);
2351
2352         if (status) {
2353             status = AVERROR_EXTERNAL;
2354             goto end_nopkt;
2355         }
2356
2357         if (vtctx->frame_ct_in == 0) {
2358             vtctx->first_pts = frame->pts;
2359         } else if(vtctx->frame_ct_in == 1 && vtctx->has_b_frames) {
2360             vtctx->dts_delta = frame->pts - vtctx->first_pts;
2361         }
2362
2363         vtctx->frame_ct_in++;
2364     } else if(!vtctx->flushing) {
2365         vtctx->flushing = true;
2366
2367         status = VTCompressionSessionCompleteFrames(vtctx->session,
2368                                                     kCMTimeIndefinite);
2369
2370         if (status) {
2371             av_log(avctx, AV_LOG_ERROR, "Error flushing frames: %d\n", status);
2372             status = AVERROR_EXTERNAL;
2373             goto end_nopkt;
2374         }
2375     }
2376
2377     *got_packet = 0;
2378     get_frame = vtctx->dts_delta >= 0 || !frame;
2379     if (!get_frame) {
2380         status = 0;
2381         goto end_nopkt;
2382     }
2383
2384     status = vtenc_q_pop(vtctx, !frame, &buf, &sei);
2385     if (status) goto end_nopkt;
2386     if (!buf)   goto end_nopkt;
2387
2388     status = vtenc_cm_to_avpacket(avctx, buf, pkt, sei);
2389     if (sei) {
2390         if (sei->data) av_free(sei->data);
2391         av_free(sei);
2392     }
2393     CFRelease(buf);
2394     if (status) goto end_nopkt;
2395
2396     *got_packet = 1;
2397     return 0;
2398
2399 end_nopkt:
2400     av_packet_unref(pkt);
2401     return status;
2402 }
2403
2404 static int vtenc_populate_extradata(AVCodecContext   *avctx,
2405                                     CMVideoCodecType codec_type,
2406                                     CFStringRef      profile_level,
2407                                     CFNumberRef      gamma_level,
2408                                     CFDictionaryRef  enc_info,
2409                                     CFDictionaryRef  pixel_buffer_info)
2410 {
2411     VTEncContext *vtctx = avctx->priv_data;
2412     int status;
2413     CVPixelBufferPoolRef pool = NULL;
2414     CVPixelBufferRef pix_buf = NULL;
2415     CMTime time;
2416     CMSampleBufferRef buf = NULL;
2417
2418     status = vtenc_create_encoder(avctx,
2419                                   codec_type,
2420                                   profile_level,
2421                                   gamma_level,
2422                                   enc_info,
2423                                   pixel_buffer_info,
2424                                   &vtctx->session);
2425     if (status)
2426         goto pe_cleanup;
2427
2428     pool = VTCompressionSessionGetPixelBufferPool(vtctx->session);
2429     if(!pool){
2430         av_log(avctx, AV_LOG_ERROR, "Error getting pixel buffer pool.\n");
2431         goto pe_cleanup;
2432     }
2433
2434     status = CVPixelBufferPoolCreatePixelBuffer(NULL,
2435                                                 pool,
2436                                                 &pix_buf);
2437
2438     if(status != kCVReturnSuccess){
2439         av_log(avctx, AV_LOG_ERROR, "Error creating frame from pool: %d\n", status);
2440         goto pe_cleanup;
2441     }
2442
2443     time = CMTimeMake(0, avctx->time_base.den);
2444     status = VTCompressionSessionEncodeFrame(vtctx->session,
2445                                              pix_buf,
2446                                              time,
2447                                              kCMTimeInvalid,
2448                                              NULL,
2449                                              NULL,
2450                                              NULL);
2451
2452     if (status) {
2453         av_log(avctx,
2454                AV_LOG_ERROR,
2455                "Error sending frame for extradata: %d\n",
2456                status);
2457
2458         goto pe_cleanup;
2459     }
2460
2461     //Populates extradata - output frames are flushed and param sets are available.
2462     status = VTCompressionSessionCompleteFrames(vtctx->session,
2463                                                 kCMTimeIndefinite);
2464
2465     if (status)
2466         goto pe_cleanup;
2467
2468     status = vtenc_q_pop(vtctx, 0, &buf, NULL);
2469     if (status) {
2470         av_log(avctx, AV_LOG_ERROR, "popping: %d\n", status);
2471         goto pe_cleanup;
2472     }
2473
2474     CFRelease(buf);
2475
2476
2477
2478 pe_cleanup:
2479     if(vtctx->session)
2480         CFRelease(vtctx->session);
2481
2482     vtctx->session = NULL;
2483     vtctx->frame_ct_out = 0;
2484
2485     av_assert0(status != 0 || (avctx->extradata && avctx->extradata_size > 0));
2486
2487     return status;
2488 }
2489
2490 static av_cold int vtenc_close(AVCodecContext *avctx)
2491 {
2492     VTEncContext *vtctx = avctx->priv_data;
2493
2494     if(!vtctx->session) {
2495         pthread_cond_destroy(&vtctx->cv_sample_sent);
2496         pthread_mutex_destroy(&vtctx->lock);
2497         return 0;
2498     }
2499
2500     VTCompressionSessionCompleteFrames(vtctx->session,
2501                                        kCMTimeIndefinite);
2502     clear_frame_queue(vtctx);
2503     pthread_cond_destroy(&vtctx->cv_sample_sent);
2504     pthread_mutex_destroy(&vtctx->lock);
2505     CFRelease(vtctx->session);
2506     vtctx->session = NULL;
2507
2508     if (vtctx->color_primaries) {
2509         CFRelease(vtctx->color_primaries);
2510         vtctx->color_primaries = NULL;
2511     }
2512
2513     if (vtctx->transfer_function) {
2514         CFRelease(vtctx->transfer_function);
2515         vtctx->transfer_function = NULL;
2516     }
2517
2518     if (vtctx->ycbcr_matrix) {
2519         CFRelease(vtctx->ycbcr_matrix);
2520         vtctx->ycbcr_matrix = NULL;
2521     }
2522
2523     return 0;
2524 }
2525
2526 static const enum AVPixelFormat avc_pix_fmts[] = {
2527     AV_PIX_FMT_VIDEOTOOLBOX,
2528     AV_PIX_FMT_NV12,
2529     AV_PIX_FMT_YUV420P,
2530     AV_PIX_FMT_NONE
2531 };
2532
2533 static const enum AVPixelFormat hevc_pix_fmts[] = {
2534     AV_PIX_FMT_VIDEOTOOLBOX,
2535     AV_PIX_FMT_NV12,
2536     AV_PIX_FMT_YUV420P,
2537     AV_PIX_FMT_P010LE,
2538     AV_PIX_FMT_NONE
2539 };
2540
2541 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
2542 #define COMMON_OPTIONS \
2543     { "allow_sw", "Allow software encoding", OFFSET(allow_sw), AV_OPT_TYPE_BOOL, \
2544         { .i64 = 0 }, 0, 1, VE }, \
2545     { "require_sw", "Require software encoding", OFFSET(require_sw), AV_OPT_TYPE_BOOL, \
2546         { .i64 = 0 }, 0, 1, VE }, \
2547     { "realtime", "Hint that encoding should happen in real-time if not faster (e.g. capturing from camera).", \
2548         OFFSET(realtime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
2549     { "frames_before", "Other frames will come before the frames in this session. This helps smooth concatenation issues.", \
2550         OFFSET(frames_before), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
2551     { "frames_after", "Other frames will come after the frames in this session. This helps smooth concatenation issues.", \
2552         OFFSET(frames_after), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
2553
2554 #define OFFSET(x) offsetof(VTEncContext, x)
2555 static const AVOption h264_options[] = {
2556     { "profile", "Profile", OFFSET(profile), AV_OPT_TYPE_INT, { .i64 = H264_PROF_AUTO }, H264_PROF_AUTO, H264_PROF_COUNT, VE, "profile" },
2557     { "baseline", "Baseline Profile", 0, AV_OPT_TYPE_CONST, { .i64 = H264_PROF_BASELINE }, INT_MIN, INT_MAX, VE, "profile" },
2558     { "main",     "Main Profile",     0, AV_OPT_TYPE_CONST, { .i64 = H264_PROF_MAIN     }, INT_MIN, INT_MAX, VE, "profile" },
2559     { "high",     "High Profile",     0, AV_OPT_TYPE_CONST, { .i64 = H264_PROF_HIGH     }, INT_MIN, INT_MAX, VE, "profile" },
2560     { "extended", "Extend Profile",   0, AV_OPT_TYPE_CONST, { .i64 = H264_PROF_EXTENDED }, INT_MIN, INT_MAX, VE, "profile" },
2561
2562     { "level", "Level", OFFSET(level), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 52, VE, "level" },
2563     { "1.3", "Level 1.3, only available with Baseline Profile", 0, AV_OPT_TYPE_CONST, { .i64 = 13 }, INT_MIN, INT_MAX, VE, "level" },
2564     { "3.0", "Level 3.0", 0, AV_OPT_TYPE_CONST, { .i64 = 30 }, INT_MIN, INT_MAX, VE, "level" },
2565     { "3.1", "Level 3.1", 0, AV_OPT_TYPE_CONST, { .i64 = 31 }, INT_MIN, INT_MAX, VE, "level" },
2566     { "3.2", "Level 3.2", 0, AV_OPT_TYPE_CONST, { .i64 = 32 }, INT_MIN, INT_MAX, VE, "level" },
2567     { "4.0", "Level 4.0", 0, AV_OPT_TYPE_CONST, { .i64 = 40 }, INT_MIN, INT_MAX, VE, "level" },
2568     { "4.1", "Level 4.1", 0, AV_OPT_TYPE_CONST, { .i64 = 41 }, INT_MIN, INT_MAX, VE, "level" },
2569     { "4.2", "Level 4.2", 0, AV_OPT_TYPE_CONST, { .i64 = 42 }, INT_MIN, INT_MAX, VE, "level" },
2570     { "5.0", "Level 5.0", 0, AV_OPT_TYPE_CONST, { .i64 = 50 }, INT_MIN, INT_MAX, VE, "level" },
2571     { "5.1", "Level 5.1", 0, AV_OPT_TYPE_CONST, { .i64 = 51 }, INT_MIN, INT_MAX, VE, "level" },
2572     { "5.2", "Level 5.2", 0, AV_OPT_TYPE_CONST, { .i64 = 52 }, INT_MIN, INT_MAX, VE, "level" },
2573
2574     { "coder", "Entropy coding", OFFSET(entropy), AV_OPT_TYPE_INT, { .i64 = VT_ENTROPY_NOT_SET }, VT_ENTROPY_NOT_SET, VT_CABAC, VE, "coder" },
2575     { "cavlc", "CAVLC entropy coding", 0, AV_OPT_TYPE_CONST, { .i64 = VT_CAVLC }, INT_MIN, INT_MAX, VE, "coder" },
2576     { "vlc",   "CAVLC entropy coding", 0, AV_OPT_TYPE_CONST, { .i64 = VT_CAVLC }, INT_MIN, INT_MAX, VE, "coder" },
2577     { "cabac", "CABAC entropy coding", 0, AV_OPT_TYPE_CONST, { .i64 = VT_CABAC }, INT_MIN, INT_MAX, VE, "coder" },
2578     { "ac",    "CABAC entropy coding", 0, AV_OPT_TYPE_CONST, { .i64 = VT_CABAC }, INT_MIN, INT_MAX, VE, "coder" },
2579
2580     { "a53cc", "Use A53 Closed Captions (if available)", OFFSET(a53_cc), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, VE },
2581
2582     COMMON_OPTIONS
2583     { NULL },
2584 };
2585
2586 static const AVClass h264_videotoolbox_class = {
2587     .class_name = "h264_videotoolbox",
2588     .item_name  = av_default_item_name,
2589     .option     = h264_options,
2590     .version    = LIBAVUTIL_VERSION_INT,
2591 };
2592
2593 AVCodec ff_h264_videotoolbox_encoder = {
2594     .name             = "h264_videotoolbox",
2595     .long_name        = NULL_IF_CONFIG_SMALL("VideoToolbox H.264 Encoder"),
2596     .type             = AVMEDIA_TYPE_VIDEO,
2597     .id               = AV_CODEC_ID_H264,
2598     .priv_data_size   = sizeof(VTEncContext),
2599     .pix_fmts         = avc_pix_fmts,
2600     .init             = vtenc_init,
2601     .encode2          = vtenc_frame,
2602     .close            = vtenc_close,
2603     .capabilities     = AV_CODEC_CAP_DELAY,
2604     .priv_class       = &h264_videotoolbox_class,
2605     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
2606                         FF_CODEC_CAP_INIT_CLEANUP,
2607 };
2608
2609 static const AVOption hevc_options[] = {
2610     { "profile", "Profile", OFFSET(profile), AV_OPT_TYPE_INT, { .i64 = HEVC_PROF_AUTO }, HEVC_PROF_AUTO, HEVC_PROF_COUNT, VE, "profile" },
2611     { "main",     "Main Profile",     0, AV_OPT_TYPE_CONST, { .i64 = HEVC_PROF_MAIN   }, INT_MIN, INT_MAX, VE, "profile" },
2612     { "main10",   "Main10 Profile",   0, AV_OPT_TYPE_CONST, { .i64 = HEVC_PROF_MAIN10 }, INT_MIN, INT_MAX, VE, "profile" },
2613
2614     COMMON_OPTIONS
2615     { NULL },
2616 };
2617
2618 static const AVClass hevc_videotoolbox_class = {
2619     .class_name = "hevc_videotoolbox",
2620     .item_name  = av_default_item_name,
2621     .option     = hevc_options,
2622     .version    = LIBAVUTIL_VERSION_INT,
2623 };
2624
2625 AVCodec ff_hevc_videotoolbox_encoder = {
2626     .name             = "hevc_videotoolbox",
2627     .long_name        = NULL_IF_CONFIG_SMALL("VideoToolbox H.265 Encoder"),
2628     .type             = AVMEDIA_TYPE_VIDEO,
2629     .id               = AV_CODEC_ID_HEVC,
2630     .priv_data_size   = sizeof(VTEncContext),
2631     .pix_fmts         = hevc_pix_fmts,
2632     .init             = vtenc_init,
2633     .encode2          = vtenc_frame,
2634     .close            = vtenc_close,
2635     .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE,
2636     .priv_class       = &hevc_videotoolbox_class,
2637     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
2638                         FF_CODEC_CAP_INIT_CLEANUP,
2639     .wrapper_name     = "videotoolbox",
2640 };