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

   1 /*
   2  * Videotoolbox hardware acceleration
   3  *
   4  * copyright (c) 2012 Sebastien Zwickert
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "config.h"
  24 #include "videotoolbox.h"
  25 #include "libavutil/hwcontext_videotoolbox.h"
  26 #include "vt_internal.h"
  27 #include "libavutil/avutil.h"
  28 #include "libavutil/hwcontext.h"
  29 #include "bytestream.h"
  30 #include "decode.h"
  31 #include "h264dec.h"
  32 #include "hevcdec.h"
  33 #include "mpegvideo.h"
  34 #include <TargetConditionals.h>
  35
  36 #ifndef kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder
  37 #  define kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder CFSTR("RequireHardwareAcceleratedVideoDecoder")
  38 #endif
  39
  40 #if !HAVE_KCMVIDEOCODECTYPE_HEVC
  41 enum { kCMVideoCodecType_HEVC = 'hvc1' };
  42 #endif
  43
  44 #define VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING  12
  45
  46 static void videotoolbox_buffer_release(void *opaque, uint8_t *data)
  47 {
  48     CVPixelBufferRef cv_buffer = (CVImageBufferRef)data;
  49     CVPixelBufferRelease(cv_buffer);
  50 }
  51
  52 static int videotoolbox_buffer_copy(VTContext *vtctx,
  53                                     const uint8_t *buffer,
  54                                     uint32_t size)
  55 {
  56     void *tmp;
  57
  58     tmp = av_fast_realloc(vtctx->bitstream,
  59                          &vtctx->allocated_size,
  60                          size);
  61
  62     if (!tmp)
  63         return AVERROR(ENOMEM);
  64
  65     vtctx->bitstream = tmp;
  66     memcpy(vtctx->bitstream, buffer, size);
  67     vtctx->bitstream_size = size;
  68
  69     return 0;
  70 }
  71
  72 int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
  73 {
  74     int ret = ff_attach_decode_data(frame);
  75     if (ret < 0)
  76         return ret;
  77
  78     frame->width  = avctx->width;
  79     frame->height = avctx->height;
  80     frame->format = avctx->pix_fmt;
  81     frame->buf[0] = av_buffer_alloc(1);
  82
  83     if (!frame->buf[0])
  84         return AVERROR(ENOMEM);
  85
  86     return 0;
  87 }
  88
  89 #define AV_W8(p, v) *(p) = (v)
  90
  91 CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx)
  92 {
  93     H264Context *h = avctx->priv_data;
  94     CFDataRef data = NULL;
  95     uint8_t *p;
  96     int vt_extradata_size = 6 + 2 + h->ps.sps->data_size + 3 + h->ps.pps->data_size;
  97     uint8_t *vt_extradata = av_malloc(vt_extradata_size);
  98     if (!vt_extradata)
  99         return NULL;
 100
 101     p = vt_extradata;
 102
 103     AV_W8(p + 0, 1); /* version */
 104     AV_W8(p + 1, h->ps.sps->data[1]); /* profile */
 105     AV_W8(p + 2, h->ps.sps->data[2]); /* profile compat */
 106     AV_W8(p + 3, h->ps.sps->data[3]); /* level */
 107     AV_W8(p + 4, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 3 (11) */
 108     AV_W8(p + 5, 0xe1); /* 3 bits reserved (111) + 5 bits number of sps (00001) */
 109     AV_WB16(p + 6, h->ps.sps->data_size);
 110     memcpy(p + 8, h->ps.sps->data, h->ps.sps->data_size);
 111     p += 8 + h->ps.sps->data_size;
 112     AV_W8(p + 0, 1); /* number of pps */
 113     AV_WB16(p + 1, h->ps.pps->data_size);
 114     memcpy(p + 3, h->ps.pps->data, h->ps.pps->data_size);
 115
 116     p += 3 + h->ps.pps->data_size;
 117     av_assert0(p - vt_extradata == vt_extradata_size);
 118
 119     data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
 120     av_free(vt_extradata);
 121     return data;
 122 }
 123
 124 CFDataRef ff_videotoolbox_hvcc_extradata_create(AVCodecContext *avctx)
 125 {
 126     HEVCContext *h = avctx->priv_data;
 127     const HEVCVPS *vps = (const HEVCVPS *)h->ps.vps_list[0]->data;
 128     const HEVCSPS *sps = (const HEVCSPS *)h->ps.sps_list[0]->data;
 129     int i, num_pps = 0;
 130     const HEVCPPS *pps = h->ps.pps;
 131     PTLCommon ptlc = vps->ptl.general_ptl;
 132     VUI vui = sps->vui;
 133     uint8_t parallelismType;
 134     CFDataRef data = NULL;
 135     uint8_t *p;
 136     int vt_extradata_size = 23 + 5 + vps->data_size + 5 + sps->data_size + 3;
 137     uint8_t *vt_extradata;
 138
 139     for (i = 0; i < HEVC_MAX_PPS_COUNT; i++) {
 140         if (h->ps.pps_list[i]) {
 141             const HEVCPPS *pps = (const HEVCPPS *)h->ps.pps_list[i]->data;
 142             vt_extradata_size += 2 + pps->data_size;
 143             num_pps++;
 144         }
 145     }
 146
 147     vt_extradata = av_malloc(vt_extradata_size);
 148     if (!vt_extradata)
 149         return NULL;
 150     p = vt_extradata;
 151
 152     /* unsigned int(8) configurationVersion = 1; */
 153     AV_W8(p + 0, 1);
 154
 155     /*
 156      * unsigned int(2) general_profile_space;
 157      * unsigned int(1) general_tier_flag;
 158      * unsigned int(5) general_profile_idc;
 159      */
 160     AV_W8(p + 1, ptlc.profile_space << 6 |
 161                  ptlc.tier_flag     << 5 |
 162                  ptlc.profile_idc);
 163
 164     /* unsigned int(32) general_profile_compatibility_flags; */
 165     memcpy(p + 2, ptlc.profile_compatibility_flag, 4);
 166
 167     /* unsigned int(48) general_constraint_indicator_flags; */
 168     AV_W8(p + 6, ptlc.progressive_source_flag    << 7 |
 169                  ptlc.interlaced_source_flag     << 6 |
 170                  ptlc.non_packed_constraint_flag << 5 |
 171                  ptlc.frame_only_constraint_flag << 4);
 172     AV_W8(p + 7, 0);
 173     AV_WN32(p + 8, 0);
 174
 175     /* unsigned int(8) general_level_idc; */
 176     AV_W8(p + 12, ptlc.level_idc);
 177
 178     /*
 179      * bit(4) reserved = ‘1111’b;
 180      * unsigned int(12) min_spatial_segmentation_idc;
 181      */
 182     AV_W8(p + 13, 0xf0 | (vui.min_spatial_segmentation_idc >> 4));
 183     AV_W8(p + 14, vui.min_spatial_segmentation_idc & 0xff);
 184
 185     /*
 186      * bit(6) reserved = ‘111111’b;
 187      * unsigned int(2) parallelismType;
 188      */
 189     if (!vui.min_spatial_segmentation_idc)
 190         parallelismType = 0;
 191     else if (pps->entropy_coding_sync_enabled_flag && pps->tiles_enabled_flag)
 192         parallelismType = 0;
 193     else if (pps->entropy_coding_sync_enabled_flag)
 194         parallelismType = 3;
 195     else if (pps->tiles_enabled_flag)
 196         parallelismType = 2;
 197     else
 198         parallelismType = 1;
 199     AV_W8(p + 15, 0xfc | parallelismType);
 200
 201     /*
 202      * bit(6) reserved = ‘111111’b;
 203      * unsigned int(2) chromaFormat;
 204      */
 205     AV_W8(p + 16, sps->chroma_format_idc | 0xfc);
 206
 207     /*
 208      * bit(5) reserved = ‘11111’b;
 209      * unsigned int(3) bitDepthLumaMinus8;
 210      */
 211     AV_W8(p + 17, (sps->bit_depth - 8) | 0xfc);
 212
 213     /*
 214      * bit(5) reserved = ‘11111’b;
 215      * unsigned int(3) bitDepthChromaMinus8;
 216      */
 217     AV_W8(p + 18, (sps->bit_depth_chroma - 8) | 0xfc);
 218
 219     /* bit(16) avgFrameRate; */
 220     AV_WB16(p + 19, 0);
 221
 222     /*
 223      * bit(2) constantFrameRate;
 224      * bit(3) numTemporalLayers;
 225      * bit(1) temporalIdNested;
 226      * unsigned int(2) lengthSizeMinusOne;
 227      */
 228     AV_W8(p + 21, 0                             << 6 |
 229                   sps->max_sub_layers           << 3 |
 230                   sps->temporal_id_nesting_flag << 2 |
 231                   3);
 232
 233     /* unsigned int(8) numOfArrays; */
 234     AV_W8(p + 22, 3);
 235
 236     p += 23;
 237     /* vps */
 238     /*
 239      * bit(1) array_completeness;
 240      * unsigned int(1) reserved = 0;
 241      * unsigned int(6) NAL_unit_type;
 242      */
 243     AV_W8(p, 1 << 7 |
 244              HEVC_NAL_VPS & 0x3f);
 245     /* unsigned int(16) numNalus; */
 246     AV_WB16(p + 1, 1);
 247     /* unsigned int(16) nalUnitLength; */
 248     AV_WB16(p + 3, vps->data_size);
 249     /* bit(8*nalUnitLength) nalUnit; */
 250     memcpy(p + 5, vps->data, vps->data_size);
 251     p += 5 + vps->data_size;
 252
 253     /* sps */
 254     AV_W8(p, 1 << 7 |
 255              HEVC_NAL_SPS & 0x3f);
 256     AV_WB16(p + 1, 1);
 257     AV_WB16(p + 3, sps->data_size);
 258     memcpy(p + 5, sps->data, sps->data_size);
 259     p += 5 + sps->data_size;
 260
 261     /* pps */
 262     AV_W8(p, 1 << 7 |
 263              HEVC_NAL_PPS & 0x3f);
 264     AV_WB16(p + 1, num_pps);
 265     p += 3;
 266     for (i = 0; i < HEVC_MAX_PPS_COUNT; i++) {
 267         if (h->ps.pps_list[i]) {
 268             const HEVCPPS *pps = (const HEVCPPS *)h->ps.pps_list[i]->data;
 269             AV_WB16(p, pps->data_size);
 270             memcpy(p + 2, pps->data, pps->data_size);
 271             p += 2 + pps->data_size;
 272         }
 273     }
 274
 275     av_assert0(p - vt_extradata == vt_extradata_size);
 276
 277     data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
 278     av_free(vt_extradata);
 279     return data;
 280 }
 281
 282 int ff_videotoolbox_buffer_create(VTContext *vtctx, AVFrame *frame)
 283 {
 284     av_buffer_unref(&frame->buf[0]);
 285
 286     frame->buf[0] = av_buffer_create((uint8_t*)vtctx->frame,
 287                                      sizeof(vtctx->frame),
 288                                      videotoolbox_buffer_release,
 289                                      NULL,
 290                                      AV_BUFFER_FLAG_READONLY);
 291     if (!frame->buf[0]) {
 292         return AVERROR(ENOMEM);
 293     }
 294
 295     frame->data[3] = (uint8_t*)vtctx->frame;
 296     vtctx->frame = NULL;
 297
 298     return 0;
 299 }
 300
 301 int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx,
 302                                      const uint8_t *buffer,
 303                                      uint32_t size)
 304 {
 305     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 306     H264Context *h  = avctx->priv_data;
 307
 308     if (h->is_avc == 1) {
 309         return videotoolbox_buffer_copy(vtctx, buffer, size);
 310     }
 311
 312     return 0;
 313 }
 314
 315 static int videotoolbox_h264_decode_params(AVCodecContext *avctx,
 316                                            int type,
 317                                            const uint8_t *buffer,
 318                                            uint32_t size)
 319 {
 320     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 321
 322     if (type == H264_NAL_SPS) {
 323         if (!vtctx->sps || vtctx->sps_len != size || memcmp(buffer, vtctx->sps, size) != 0) {
 324             vtctx->sps = av_fast_realloc(vtctx->sps, &vtctx->sps_capa, size);
 325             if (vtctx->sps)
 326                 memcpy(vtctx->sps, buffer, size);
 327             vtctx->reconfig_needed = true;
 328             vtctx->sps_len = size;
 329         }
 330     }
 331
 332     // pass-through new PPS to the decoder
 333     return ff_videotoolbox_h264_decode_slice(avctx, buffer, size);
 334 }
 335
 336 int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx,
 337                                       const uint8_t *buffer,
 338                                       uint32_t size)
 339 {
 340     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 341     H264Context *h  = avctx->priv_data;
 342     void *tmp;
 343
 344     if (h->is_avc == 1)
 345         return 0;
 346
 347     tmp = av_fast_realloc(vtctx->bitstream,
 348                           &vtctx->allocated_size,
 349                           vtctx->bitstream_size+size+4);
 350     if (!tmp)
 351         return AVERROR(ENOMEM);
 352
 353     vtctx->bitstream = tmp;
 354
 355     AV_WB32(vtctx->bitstream + vtctx->bitstream_size, size);
 356     memcpy(vtctx->bitstream + vtctx->bitstream_size + 4, buffer, size);
 357
 358     vtctx->bitstream_size += size + 4;
 359
 360     return 0;
 361 }
 362
 363 int ff_videotoolbox_uninit(AVCodecContext *avctx)
 364 {
 365     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 366     if (vtctx) {
 367         av_freep(&vtctx->bitstream);
 368         av_freep(&vtctx->sps);
 369         if (vtctx->frame)
 370             CVPixelBufferRelease(vtctx->frame);
 371     }
 372
 373     return 0;
 374 }
 375
 376 #if CONFIG_VIDEOTOOLBOX
 377 // Return the AVVideotoolboxContext that matters currently. Where it comes from
 378 // depends on the API used.
 379 static AVVideotoolboxContext *videotoolbox_get_context(AVCodecContext *avctx)
 380 {
 381     // Somewhat tricky because the user can call av_videotoolbox_default_free()
 382     // at any time, even when the codec is closed.
 383     if (avctx->internal && avctx->internal->hwaccel_priv_data) {
 384         VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 385         if (vtctx->vt_ctx)
 386             return vtctx->vt_ctx;
 387     }
 388     return avctx->hwaccel_context;
 389 }
 390
 391 static int videotoolbox_buffer_create(AVCodecContext *avctx, AVFrame *frame)
 392 {
 393     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 394     CVPixelBufferRef pixbuf = (CVPixelBufferRef)vtctx->frame;
 395     OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
 396     enum AVPixelFormat sw_format = av_map_videotoolbox_format_to_pixfmt(pixel_format);
 397     int width = CVPixelBufferGetWidth(pixbuf);
 398     int height = CVPixelBufferGetHeight(pixbuf);
 399     AVHWFramesContext *cached_frames;
 400     int ret;
 401
 402     ret = ff_videotoolbox_buffer_create(vtctx, frame);
 403     if (ret < 0)
 404         return ret;
 405
 406     // Old API code path.
 407     if (!vtctx->cached_hw_frames_ctx)
 408         return 0;
 409
 410     cached_frames = (AVHWFramesContext*)vtctx->cached_hw_frames_ctx->data;
 411
 412     if (cached_frames->sw_format != sw_format ||
 413         cached_frames->width != width ||
 414         cached_frames->height != height) {
 415         AVBufferRef *hw_frames_ctx = av_hwframe_ctx_alloc(cached_frames->device_ref);
 416         AVHWFramesContext *hw_frames;
 417         if (!hw_frames_ctx)
 418             return AVERROR(ENOMEM);
 419
 420         hw_frames = (AVHWFramesContext*)hw_frames_ctx->data;
 421         hw_frames->format = cached_frames->format;
 422         hw_frames->sw_format = sw_format;
 423         hw_frames->width = width;
 424         hw_frames->height = height;
 425
 426         ret = av_hwframe_ctx_init(hw_frames_ctx);
 427         if (ret < 0) {
 428             av_buffer_unref(&hw_frames_ctx);
 429             return ret;
 430         }
 431
 432         av_buffer_unref(&vtctx->cached_hw_frames_ctx);
 433         vtctx->cached_hw_frames_ctx = hw_frames_ctx;
 434     }
 435
 436     av_buffer_unref(&frame->hw_frames_ctx);
 437     frame->hw_frames_ctx = av_buffer_ref(vtctx->cached_hw_frames_ctx);
 438     if (!frame->hw_frames_ctx)
 439         return AVERROR(ENOMEM);
 440
 441     return 0;
 442 }
 443
 444 static void videotoolbox_write_mp4_descr_length(PutByteContext *pb, int length)
 445 {
 446     int i;
 447     uint8_t b;
 448
 449     for (i = 3; i >= 0; i--) {
 450         b = (length >> (i * 7)) & 0x7F;
 451         if (i != 0)
 452             b |= 0x80;
 453
 454         bytestream2_put_byteu(pb, b);
 455     }
 456 }
 457
 458 static CFDataRef videotoolbox_esds_extradata_create(AVCodecContext *avctx)
 459 {
 460     CFDataRef data;
 461     uint8_t *rw_extradata;
 462     PutByteContext pb;
 463     int full_size = 3 + 5 + 13 + 5 + avctx->extradata_size + 3;
 464     // ES_DescrTag data + DecoderConfigDescrTag + data + DecSpecificInfoTag + size + SLConfigDescriptor
 465     int config_size = 13 + 5 + avctx->extradata_size;
 466     int s;
 467
 468     if (!(rw_extradata = av_mallocz(full_size + VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING)))
 469         return NULL;
 470
 471     bytestream2_init_writer(&pb, rw_extradata, full_size + VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING);
 472     bytestream2_put_byteu(&pb, 0);        // version
 473     bytestream2_put_ne24(&pb, 0);         // flags
 474
 475     // elementary stream descriptor
 476     bytestream2_put_byteu(&pb, 0x03);     // ES_DescrTag
 477     videotoolbox_write_mp4_descr_length(&pb, full_size);
 478     bytestream2_put_ne16(&pb, 0);         // esid
 479     bytestream2_put_byteu(&pb, 0);        // stream priority (0-32)
 480
 481     // decoder configuration descriptor
 482     bytestream2_put_byteu(&pb, 0x04);     // DecoderConfigDescrTag
 483     videotoolbox_write_mp4_descr_length(&pb, config_size);
 484     bytestream2_put_byteu(&pb, 32);       // object type indication. 32 = AV_CODEC_ID_MPEG4
 485     bytestream2_put_byteu(&pb, 0x11);     // stream type
 486     bytestream2_put_ne24(&pb, 0);         // buffer size
 487     bytestream2_put_ne32(&pb, 0);         // max bitrate
 488     bytestream2_put_ne32(&pb, 0);         // avg bitrate
 489
 490     // decoder specific descriptor
 491     bytestream2_put_byteu(&pb, 0x05);     ///< DecSpecificInfoTag
 492     videotoolbox_write_mp4_descr_length(&pb, avctx->extradata_size);
 493
 494     bytestream2_put_buffer(&pb, avctx->extradata, avctx->extradata_size);
 495
 496     // SLConfigDescriptor
 497     bytestream2_put_byteu(&pb, 0x06);     // SLConfigDescrTag
 498     bytestream2_put_byteu(&pb, 0x01);     // length
 499     bytestream2_put_byteu(&pb, 0x02);     //
 500
 501     s = bytestream2_size_p(&pb);
 502
 503     data = CFDataCreate(kCFAllocatorDefault, rw_extradata, s);
 504
 505     av_freep(&rw_extradata);
 506     return data;
 507 }
 508
 509 static CMSampleBufferRef videotoolbox_sample_buffer_create(CMFormatDescriptionRef fmt_desc,
 510                                                            void *buffer,
 511                                                            int size)
 512 {
 513     OSStatus status;
 514     CMBlockBufferRef  block_buf;
 515     CMSampleBufferRef sample_buf;
 516
 517     block_buf  = NULL;
 518     sample_buf = NULL;
 519
 520     status = CMBlockBufferCreateWithMemoryBlock(kCFAllocatorDefault,// structureAllocator
 521                                                 buffer,             // memoryBlock
 522                                                 size,               // blockLength
 523                                                 kCFAllocatorNull,   // blockAllocator
 524                                                 NULL,               // customBlockSource
 525                                                 0,                  // offsetToData
 526                                                 size,               // dataLength
 527                                                 0,                  // flags
 528                                                 &block_buf);
 529
 530     if (!status) {
 531         status = CMSampleBufferCreate(kCFAllocatorDefault,  // allocator
 532                                       block_buf,            // dataBuffer
 533                                       TRUE,                 // dataReady
 534                                       0,                    // makeDataReadyCallback
 535                                       0,                    // makeDataReadyRefcon
 536                                       fmt_desc,             // formatDescription
 537                                       1,                    // numSamples
 538                                       0,                    // numSampleTimingEntries
 539                                       NULL,                 // sampleTimingArray
 540                                       0,                    // numSampleSizeEntries
 541                                       NULL,                 // sampleSizeArray
 542                                       &sample_buf);
 543     }
 544
 545     if (block_buf)
 546         CFRelease(block_buf);
 547
 548     return sample_buf;
 549 }
 550
 551 static void videotoolbox_decoder_callback(void *opaque,
 552                                           void *sourceFrameRefCon,
 553                                           OSStatus status,
 554                                           VTDecodeInfoFlags flags,
 555                                           CVImageBufferRef image_buffer,
 556                                           CMTime pts,
 557                                           CMTime duration)
 558 {
 559     AVCodecContext *avctx = opaque;
 560     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 561
 562     if (vtctx->frame) {
 563         CVPixelBufferRelease(vtctx->frame);
 564         vtctx->frame = NULL;
 565     }
 566
 567     if (!image_buffer) {
 568         av_log(NULL, AV_LOG_DEBUG, "vt decoder cb: output image buffer is null\n");
 569         return;
 570     }
 571
 572     vtctx->frame = CVPixelBufferRetain(image_buffer);
 573 }
 574
 575 static OSStatus videotoolbox_session_decode_frame(AVCodecContext *avctx)
 576 {
 577     OSStatus status;
 578     CMSampleBufferRef sample_buf;
 579     AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
 580     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 581
 582     sample_buf = videotoolbox_sample_buffer_create(videotoolbox->cm_fmt_desc,
 583                                                    vtctx->bitstream,
 584                                                    vtctx->bitstream_size);
 585
 586     if (!sample_buf)
 587         return -1;
 588
 589     status = VTDecompressionSessionDecodeFrame(videotoolbox->session,
 590                                                sample_buf,
 591                                                0,       // decodeFlags
 592                                                NULL,    // sourceFrameRefCon
 593                                                0);      // infoFlagsOut
 594     if (status == noErr)
 595         status = VTDecompressionSessionWaitForAsynchronousFrames(videotoolbox->session);
 596
 597     CFRelease(sample_buf);
 598
 599     return status;
 600 }
 601
 602 static CMVideoFormatDescriptionRef videotoolbox_format_desc_create(CMVideoCodecType codec_type,
 603                                                                    CFDictionaryRef decoder_spec,
 604                                                                    int width,
 605                                                                    int height)
 606 {
 607     CMFormatDescriptionRef cm_fmt_desc;
 608     OSStatus status;
 609
 610     status = CMVideoFormatDescriptionCreate(kCFAllocatorDefault,
 611                                             codec_type,
 612                                             width,
 613                                             height,
 614                                             decoder_spec, // Dictionary of extension
 615                                             &cm_fmt_desc);
 616
 617     if (status)
 618         return NULL;
 619
 620     return cm_fmt_desc;
 621 }
 622
 623 static CFDictionaryRef videotoolbox_buffer_attributes_create(int width,
 624                                                              int height,
 625                                                              OSType pix_fmt)
 626 {
 627     CFMutableDictionaryRef buffer_attributes;
 628     CFMutableDictionaryRef io_surface_properties;
 629     CFNumberRef cv_pix_fmt;
 630     CFNumberRef w;
 631     CFNumberRef h;
 632
 633     w = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &width);
 634     h = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &height);
 635     cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &pix_fmt);
 636
 637     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 638                                                   4,
 639                                                   &kCFTypeDictionaryKeyCallBacks,
 640                                                   &kCFTypeDictionaryValueCallBacks);
 641     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 642                                                       0,
 643                                                       &kCFTypeDictionaryKeyCallBacks,
 644                                                       &kCFTypeDictionaryValueCallBacks);
 645
 646     if (pix_fmt)
 647         CFDictionarySetValue(buffer_attributes, kCVPixelBufferPixelFormatTypeKey, cv_pix_fmt);
 648     CFDictionarySetValue(buffer_attributes, kCVPixelBufferIOSurfacePropertiesKey, io_surface_properties);
 649     CFDictionarySetValue(buffer_attributes, kCVPixelBufferWidthKey, w);
 650     CFDictionarySetValue(buffer_attributes, kCVPixelBufferHeightKey, h);
 651 #if TARGET_OS_IPHONE
 652     CFDictionarySetValue(buffer_attributes, kCVPixelBufferOpenGLESCompatibilityKey, kCFBooleanTrue);
 653 #else
 654     CFDictionarySetValue(buffer_attributes, kCVPixelBufferIOSurfaceOpenGLTextureCompatibilityKey, kCFBooleanTrue);
 655 #endif
 656
 657     CFRelease(io_surface_properties);
 658     CFRelease(cv_pix_fmt);
 659     CFRelease(w);
 660     CFRelease(h);
 661
 662     return buffer_attributes;
 663 }
 664
 665 static CFDictionaryRef videotoolbox_decoder_config_create(CMVideoCodecType codec_type,
 666                                                           AVCodecContext *avctx)
 667 {
 668     CFMutableDictionaryRef config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 669                                                                    0,
 670                                                                    &kCFTypeDictionaryKeyCallBacks,
 671                                                                    &kCFTypeDictionaryValueCallBacks);
 672
 673     CFDictionarySetValue(config_info,
 674                          kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder,
 675                          kCFBooleanTrue);
 676
 677     CFMutableDictionaryRef avc_info;
 678     CFDataRef data = NULL;
 679
 680     avc_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 681                                          1,
 682                                          &kCFTypeDictionaryKeyCallBacks,
 683                                          &kCFTypeDictionaryValueCallBacks);
 684
 685     switch (codec_type) {
 686     case kCMVideoCodecType_MPEG4Video :
 687         if (avctx->extradata_size)
 688             data = videotoolbox_esds_extradata_create(avctx);
 689         if (data)
 690             CFDictionarySetValue(avc_info, CFSTR("esds"), data);
 691         break;
 692     case kCMVideoCodecType_H264 :
 693         data = ff_videotoolbox_avcc_extradata_create(avctx);
 694         if (data)
 695             CFDictionarySetValue(avc_info, CFSTR("avcC"), data);
 696         break;
 697     case kCMVideoCodecType_HEVC :
 698         data = ff_videotoolbox_hvcc_extradata_create(avctx);
 699         if (data)
 700             CFDictionarySetValue(avc_info, CFSTR("hvcC"), data);
 701         break;
 702     default:
 703         break;
 704     }
 705
 706     CFDictionarySetValue(config_info,
 707             kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms,
 708             avc_info);
 709
 710     if (data)
 711         CFRelease(data);
 712
 713     CFRelease(avc_info);
 714     return config_info;
 715 }
 716
 717 static int videotoolbox_start(AVCodecContext *avctx)
 718 {
 719     AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
 720     OSStatus status;
 721     VTDecompressionOutputCallbackRecord decoder_cb;
 722     CFDictionaryRef decoder_spec;
 723     CFDictionaryRef buf_attr;
 724
 725     if (!videotoolbox) {
 726         av_log(avctx, AV_LOG_ERROR, "hwaccel context is not set\n");
 727         return -1;
 728     }
 729
 730     switch( avctx->codec_id ) {
 731     case AV_CODEC_ID_H263 :
 732         videotoolbox->cm_codec_type = kCMVideoCodecType_H263;
 733         break;
 734     case AV_CODEC_ID_H264 :
 735         videotoolbox->cm_codec_type = kCMVideoCodecType_H264;
 736         break;
 737     case AV_CODEC_ID_HEVC :
 738         videotoolbox->cm_codec_type = kCMVideoCodecType_HEVC;
 739         break;
 740     case AV_CODEC_ID_MPEG1VIDEO :
 741         videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG1Video;
 742         break;
 743     case AV_CODEC_ID_MPEG2VIDEO :
 744         videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG2Video;
 745         break;
 746     case AV_CODEC_ID_MPEG4 :
 747         videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG4Video;
 748         break;
 749     default :
 750         break;
 751     }
 752
 753     decoder_spec = videotoolbox_decoder_config_create(videotoolbox->cm_codec_type, avctx);
 754
 755     if (!decoder_spec) {
 756         av_log(avctx, AV_LOG_ERROR, "decoder specification creation failed\n");
 757         return -1;
 758     }
 759
 760     videotoolbox->cm_fmt_desc = videotoolbox_format_desc_create(videotoolbox->cm_codec_type,
 761                                                                 decoder_spec,
 762                                                                 avctx->width,
 763                                                                 avctx->height);
 764     if (!videotoolbox->cm_fmt_desc) {
 765         if (decoder_spec)
 766             CFRelease(decoder_spec);
 767
 768         av_log(avctx, AV_LOG_ERROR, "format description creation failed\n");
 769         return -1;
 770     }
 771
 772     buf_attr = videotoolbox_buffer_attributes_create(avctx->width,
 773                                                      avctx->height,
 774                                                      videotoolbox->cv_pix_fmt_type);
 775
 776     decoder_cb.decompressionOutputCallback = videotoolbox_decoder_callback;
 777     decoder_cb.decompressionOutputRefCon   = avctx;
 778
 779     status = VTDecompressionSessionCreate(NULL,                      // allocator
 780                                           videotoolbox->cm_fmt_desc, // videoFormatDescription
 781                                           decoder_spec,              // videoDecoderSpecification
 782                                           buf_attr,                  // destinationImageBufferAttributes
 783                                           &decoder_cb,               // outputCallback
 784                                           &videotoolbox->session);   // decompressionSessionOut
 785
 786     if (decoder_spec)
 787         CFRelease(decoder_spec);
 788     if (buf_attr)
 789         CFRelease(buf_attr);
 790
 791     switch (status) {
 792     case kVTVideoDecoderNotAvailableNowErr:
 793         av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox session not available.\n");
 794         return AVERROR(ENOSYS);
 795     case kVTVideoDecoderUnsupportedDataFormatErr:
 796         av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox does not support this format.\n");
 797         return AVERROR(ENOSYS);
 798     case kVTVideoDecoderMalfunctionErr:
 799         av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox malfunction.\n");
 800         return AVERROR(EINVAL);
 801     case kVTVideoDecoderBadDataErr:
 802         av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox reported invalid data.\n");
 803         return AVERROR_INVALIDDATA;
 804     case 0:
 805         return 0;
 806     default:
 807         av_log(avctx, AV_LOG_VERBOSE, "Unknown VideoToolbox session creation error %u\n", (unsigned)status);
 808         return AVERROR_UNKNOWN;
 809     }
 810 }
 811
 812 static void videotoolbox_stop(AVCodecContext *avctx)
 813 {
 814     AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
 815     if (!videotoolbox)
 816         return;
 817
 818     if (videotoolbox->cm_fmt_desc) {
 819         CFRelease(videotoolbox->cm_fmt_desc);
 820         videotoolbox->cm_fmt_desc = NULL;
 821     }
 822
 823     if (videotoolbox->session) {
 824         VTDecompressionSessionInvalidate(videotoolbox->session);
 825         CFRelease(videotoolbox->session);
 826         videotoolbox->session = NULL;
 827     }
 828 }
 829
 830 static const char *videotoolbox_error_string(OSStatus status)
 831 {
 832     switch (status) {
 833         case kVTVideoDecoderBadDataErr:
 834             return "bad data";
 835         case kVTVideoDecoderMalfunctionErr:
 836             return "decoder malfunction";
 837         case kVTInvalidSessionErr:
 838             return "invalid session";
 839     }
 840     return "unknown";
 841 }
 842
 843 static int videotoolbox_common_end_frame(AVCodecContext *avctx, AVFrame *frame)
 844 {
 845     OSStatus status;
 846     AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
 847     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 848
 849     if (vtctx->reconfig_needed == true) {
 850         vtctx->reconfig_needed = false;
 851         av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox decoder needs reconfig, restarting..\n");
 852         videotoolbox_stop(avctx);
 853         if (videotoolbox_start(avctx) != 0) {
 854             return AVERROR_EXTERNAL;
 855         }
 856     }
 857
 858     if (!videotoolbox->session || !vtctx->bitstream || !vtctx->bitstream_size)
 859         return AVERROR_INVALIDDATA;
 860
 861     status = videotoolbox_session_decode_frame(avctx);
 862     if (status != noErr) {
 863         if (status == kVTVideoDecoderMalfunctionErr || status == kVTInvalidSessionErr)
 864             vtctx->reconfig_needed = true;
 865         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%s, %d)\n", videotoolbox_error_string(status), (int)status);
 866         return AVERROR_UNKNOWN;
 867     }
 868
 869     if (!vtctx->frame) {
 870         vtctx->reconfig_needed = true;
 871         return AVERROR_UNKNOWN;
 872     }
 873
 874     return videotoolbox_buffer_create(avctx, frame);
 875 }
 876
 877 static int videotoolbox_h264_end_frame(AVCodecContext *avctx)
 878 {
 879     H264Context *h = avctx->priv_data;
 880     AVFrame *frame = h->cur_pic_ptr->f;
 881     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 882     int ret = videotoolbox_common_end_frame(avctx, frame);
 883     vtctx->bitstream_size = 0;
 884     return ret;
 885 }
 886
 887 static int videotoolbox_hevc_decode_params(AVCodecContext *avctx,
 888                                            int type,
 889                                            const uint8_t *buffer,
 890                                            uint32_t size)
 891 {
 892     return ff_videotoolbox_h264_decode_slice(avctx, buffer, size);
 893 }
 894
 895 static int videotoolbox_hevc_end_frame(AVCodecContext *avctx)
 896 {
 897     HEVCContext *h = avctx->priv_data;
 898     AVFrame *frame = h->ref->frame;
 899     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 900     int ret;
 901
 902     ret = videotoolbox_common_end_frame(avctx, frame);
 903     vtctx->bitstream_size = 0;
 904     return ret;
 905 }
 906
 907 static int videotoolbox_mpeg_start_frame(AVCodecContext *avctx,
 908                                          const uint8_t *buffer,
 909                                          uint32_t size)
 910 {
 911     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 912
 913     return videotoolbox_buffer_copy(vtctx, buffer, size);
 914 }
 915
 916 static int videotoolbox_mpeg_decode_slice(AVCodecContext *avctx,
 917                                           const uint8_t *buffer,
 918                                           uint32_t size)
 919 {
 920     return 0;
 921 }
 922
 923 static int videotoolbox_mpeg_end_frame(AVCodecContext *avctx)
 924 {
 925     MpegEncContext *s = avctx->priv_data;
 926     AVFrame *frame = s->current_picture_ptr->f;
 927
 928     return videotoolbox_common_end_frame(avctx, frame);
 929 }
 930
 931 static int videotoolbox_uninit(AVCodecContext *avctx)
 932 {
 933     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 934     if (!vtctx)
 935         return 0;
 936
 937     ff_videotoolbox_uninit(avctx);
 938
 939     if (vtctx->vt_ctx)
 940         videotoolbox_stop(avctx);
 941
 942     av_buffer_unref(&vtctx->cached_hw_frames_ctx);
 943     av_freep(&vtctx->vt_ctx);
 944
 945     return 0;
 946 }
 947
 948 static int videotoolbox_common_init(AVCodecContext *avctx)
 949 {
 950     VTContext *vtctx = avctx->internal->hwaccel_priv_data;
 951     AVHWFramesContext *hw_frames;
 952     int err;
 953
 954     // Old API - do nothing.
 955     if (avctx->hwaccel_context)
 956         return 0;
 957
 958     if (!avctx->hw_frames_ctx && !avctx->hw_device_ctx) {
 959         av_log(avctx, AV_LOG_ERROR,
 960                "Either hw_frames_ctx or hw_device_ctx must be set.\n");
 961         return AVERROR(EINVAL);
 962     }
 963
 964     vtctx->vt_ctx = av_videotoolbox_alloc_context();
 965     if (!vtctx->vt_ctx) {
 966         err = AVERROR(ENOMEM);
 967         goto fail;
 968     }
 969
 970     if (avctx->hw_frames_ctx) {
 971         hw_frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
 972     } else {
 973         avctx->hw_frames_ctx = av_hwframe_ctx_alloc(avctx->hw_device_ctx);
 974         if (!avctx->hw_frames_ctx) {
 975             err = AVERROR(ENOMEM);
 976             goto fail;
 977         }
 978
 979         hw_frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
 980         hw_frames->format = AV_PIX_FMT_VIDEOTOOLBOX;
 981         hw_frames->sw_format = AV_PIX_FMT_NV12; // same as av_videotoolbox_alloc_context()
 982         hw_frames->width = avctx->width;
 983         hw_frames->height = avctx->height;
 984
 985         err = av_hwframe_ctx_init(avctx->hw_frames_ctx);
 986         if (err < 0) {
 987             av_buffer_unref(&avctx->hw_frames_ctx);
 988             goto fail;
 989         }
 990     }
 991
 992     vtctx->cached_hw_frames_ctx = av_buffer_ref(avctx->hw_frames_ctx);
 993     if (!vtctx->cached_hw_frames_ctx) {
 994         err = AVERROR(ENOMEM);
 995         goto fail;
 996     }
 997
 998     vtctx->vt_ctx->cv_pix_fmt_type =
 999         av_map_videotoolbox_format_from_pixfmt(hw_frames->sw_format);
1000     if (!vtctx->vt_ctx->cv_pix_fmt_type) {
1001         av_log(avctx, AV_LOG_ERROR, "Unknown sw_format.\n");
1002         err = AVERROR(EINVAL);
1003         goto fail;
1004     }
1005
1006     err = videotoolbox_start(avctx);
1007     if (err < 0)
1008         goto fail;
1009
1010     return 0;
1011
1012 fail:
1013     videotoolbox_uninit(avctx);
1014     return err;
1015 }
1016
1017 static int videotoolbox_frame_params(AVCodecContext *avctx,
1018                                      AVBufferRef *hw_frames_ctx)
1019 {
1020     AVHWFramesContext *frames_ctx = (AVHWFramesContext*)hw_frames_ctx->data;
1021
1022     frames_ctx->format            = AV_PIX_FMT_VIDEOTOOLBOX;
1023     frames_ctx->width             = avctx->coded_width;
1024     frames_ctx->height            = avctx->coded_height;
1025     frames_ctx->sw_format         = AV_PIX_FMT_NV12;
1026
1027     return 0;
1028 }
1029
1030 AVHWAccel ff_h263_videotoolbox_hwaccel = {
1031     .name           = "h263_videotoolbox",
1032     .type           = AVMEDIA_TYPE_VIDEO,
1033     .id             = AV_CODEC_ID_H263,
1034     .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
1035     .alloc_frame    = ff_videotoolbox_alloc_frame,
1036     .start_frame    = videotoolbox_mpeg_start_frame,
1037     .decode_slice   = videotoolbox_mpeg_decode_slice,
1038     .end_frame      = videotoolbox_mpeg_end_frame,
1039     .frame_params   = videotoolbox_frame_params,
1040     .init           = videotoolbox_common_init,
1041     .uninit         = videotoolbox_uninit,
1042     .priv_data_size = sizeof(VTContext),
1043 };
1044
1045 AVHWAccel ff_hevc_videotoolbox_hwaccel = {
1046     .name           = "hevc_videotoolbox",
1047     .type           = AVMEDIA_TYPE_VIDEO,
1048     .id             = AV_CODEC_ID_HEVC,
1049     .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
1050     .alloc_frame    = ff_videotoolbox_alloc_frame,
1051     .start_frame    = ff_videotoolbox_h264_start_frame,
1052     .decode_slice   = ff_videotoolbox_h264_decode_slice,
1053     .decode_params  = videotoolbox_hevc_decode_params,
1054     .end_frame      = videotoolbox_hevc_end_frame,
1055     .frame_params   = videotoolbox_frame_params,
1056     .init           = videotoolbox_common_init,
1057     .uninit         = ff_videotoolbox_uninit,
1058     .priv_data_size = sizeof(VTContext),
1059 };
1060
1061 AVHWAccel ff_h264_videotoolbox_hwaccel = {
1062     .name           = "h264_videotoolbox",
1063     .type           = AVMEDIA_TYPE_VIDEO,
1064     .id             = AV_CODEC_ID_H264,
1065     .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
1066     .alloc_frame    = ff_videotoolbox_alloc_frame,
1067     .start_frame    = ff_videotoolbox_h264_start_frame,
1068     .decode_slice   = ff_videotoolbox_h264_decode_slice,
1069     .decode_params  = videotoolbox_h264_decode_params,
1070     .end_frame      = videotoolbox_h264_end_frame,
1071     .frame_params   = videotoolbox_frame_params,
1072     .init           = videotoolbox_common_init,
1073     .uninit         = videotoolbox_uninit,
1074     .priv_data_size = sizeof(VTContext),
1075 };
1076
1077 AVHWAccel ff_mpeg1_videotoolbox_hwaccel = {
1078     .name           = "mpeg1_videotoolbox",
1079     .type           = AVMEDIA_TYPE_VIDEO,
1080     .id             = AV_CODEC_ID_MPEG1VIDEO,
1081     .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
1082     .alloc_frame    = ff_videotoolbox_alloc_frame,
1083     .start_frame    = videotoolbox_mpeg_start_frame,
1084     .decode_slice   = videotoolbox_mpeg_decode_slice,
1085     .end_frame      = videotoolbox_mpeg_end_frame,
1086     .frame_params   = videotoolbox_frame_params,
1087     .init           = videotoolbox_common_init,
1088     .uninit         = videotoolbox_uninit,
1089     .priv_data_size = sizeof(VTContext),
1090 };
1091
1092 AVHWAccel ff_mpeg2_videotoolbox_hwaccel = {
1093     .name           = "mpeg2_videotoolbox",
1094     .type           = AVMEDIA_TYPE_VIDEO,
1095     .id             = AV_CODEC_ID_MPEG2VIDEO,
1096     .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
1097     .alloc_frame    = ff_videotoolbox_alloc_frame,
1098     .start_frame    = videotoolbox_mpeg_start_frame,
1099     .decode_slice   = videotoolbox_mpeg_decode_slice,
1100     .end_frame      = videotoolbox_mpeg_end_frame,
1101     .frame_params   = videotoolbox_frame_params,
1102     .init           = videotoolbox_common_init,
1103     .uninit         = videotoolbox_uninit,
1104     .priv_data_size = sizeof(VTContext),
1105 };
1106
1107 AVHWAccel ff_mpeg4_videotoolbox_hwaccel = {
1108     .name           = "mpeg4_videotoolbox",
1109     .type           = AVMEDIA_TYPE_VIDEO,
1110     .id             = AV_CODEC_ID_MPEG4,
1111     .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
1112     .alloc_frame    = ff_videotoolbox_alloc_frame,
1113     .start_frame    = videotoolbox_mpeg_start_frame,
1114     .decode_slice   = videotoolbox_mpeg_decode_slice,
1115     .end_frame      = videotoolbox_mpeg_end_frame,
1116     .frame_params   = videotoolbox_frame_params,
1117     .init           = videotoolbox_common_init,
1118     .uninit         = videotoolbox_uninit,
1119     .priv_data_size = sizeof(VTContext),
1120 };
1121
1122 AVVideotoolboxContext *av_videotoolbox_alloc_context(void)
1123 {
1124     AVVideotoolboxContext *ret = av_mallocz(sizeof(*ret));
1125
1126     if (ret) {
1127         ret->output_callback = videotoolbox_decoder_callback;
1128         ret->cv_pix_fmt_type = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
1129     }
1130
1131     return ret;
1132 }
1133
1134 int av_videotoolbox_default_init(AVCodecContext *avctx)
1135 {
1136     return av_videotoolbox_default_init2(avctx, NULL);
1137 }
1138
1139 int av_videotoolbox_default_init2(AVCodecContext *avctx, AVVideotoolboxContext *vtctx)
1140 {
1141     avctx->hwaccel_context = vtctx ?: av_videotoolbox_alloc_context();
1142     if (!avctx->hwaccel_context)
1143         return AVERROR(ENOMEM);
1144     return videotoolbox_start(avctx);
1145 }
1146
1147 void av_videotoolbox_default_free(AVCodecContext *avctx)
1148 {
1149
1150     videotoolbox_stop(avctx);
1151     av_freep(&avctx->hwaccel_context);
1152 }
1153 #endif /* CONFIG_VIDEOTOOLBOX */