git.sesse.net Git - ffmpeg/blob - libavcodec/vda_h264.c

   1 /*
   2  * VDA H.264 hardware acceleration
   3  *
   4  * copyright (c) 2011 Sebastien Zwickert
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <CoreFoundation/CFNumber.h>
  24 #include <CoreFoundation/CFData.h>
  25 #include <CoreFoundation/CFString.h>
  26
  27 #include "libavutil/avutil.h"
  28 #include "h264.h"
  29 #include "vda.h"
  30
  31 #if FF_API_VDA_ASYNC
  32 #include <CoreFoundation/CFDictionary.h>
  33
  34 /* helper to create a dictionary according to the given pts */
  35 static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
  36 {
  37     CFStringRef key           = CFSTR("FF_VDA_DECODER_PTS_KEY");
  38     CFNumberRef value         = CFNumberCreate(kCFAllocatorDefault,
  39                                                kCFNumberSInt64Type, &i_pts);
  40     CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
  41                                                    (const void **)&key,
  42                                                    (const void **)&value,
  43                                                    1,
  44                                                    &kCFTypeDictionaryKeyCallBacks,
  45                                                    &kCFTypeDictionaryValueCallBacks);
  46     CFRelease(value);
  47     return user_info;
  48 }
  49
  50 /* helper to retrieve the pts from the given dictionary */
  51 static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
  52 {
  53     CFNumberRef pts;
  54     int64_t outValue = 0;
  55
  56     if (!user_info)
  57         return 0;
  58
  59     pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
  60
  61     if (pts)
  62         CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
  63
  64     return outValue;
  65 }
  66
  67 /* Remove and release all frames from the queue. */
  68 static void vda_clear_queue(struct vda_context *vda_ctx)
  69 {
  70     vda_frame *top_frame;
  71
  72     pthread_mutex_lock(&vda_ctx->queue_mutex);
  73
  74     while (vda_ctx->queue) {
  75         top_frame      = vda_ctx->queue;
  76         vda_ctx->queue = top_frame->next_frame;
  77         ff_vda_release_vda_frame(top_frame);
  78     }
  79
  80     pthread_mutex_unlock(&vda_ctx->queue_mutex);
  81 }
  82
  83 static int vda_decoder_decode(struct vda_context *vda_ctx,
  84                               uint8_t *bitstream,
  85                               int bitstream_size,
  86                               int64_t frame_pts)
  87 {
  88     OSStatus status = kVDADecoderNoErr;
  89     CFDictionaryRef user_info;
  90     CFDataRef coded_frame;
  91
  92     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
  93     user_info   = vda_dictionary_with_pts(frame_pts);
  94     status      = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
  95
  96     CFRelease(user_info);
  97     CFRelease(coded_frame);
  98
  99     return status;
 100 }
 101
 102 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 103 {
 104     vda_frame *top_frame;
 105
 106     if (!vda_ctx->queue)
 107         return NULL;
 108
 109     pthread_mutex_lock(&vda_ctx->queue_mutex);
 110     top_frame      = vda_ctx->queue;
 111     vda_ctx->queue = top_frame->next_frame;
 112     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 113
 114     return top_frame;
 115 }
 116
 117 void ff_vda_release_vda_frame(vda_frame *frame)
 118 {
 119     if (frame) {
 120         CVPixelBufferRelease(frame->cv_buffer);
 121         av_freep(&frame);
 122     }
 123 }
 124 #endif
 125
 126 /* Decoder callback that adds the VDA frame to the queue in display order. */
 127 static void vda_decoder_callback(void *vda_hw_ctx,
 128                                  CFDictionaryRef user_info,
 129                                  OSStatus status,
 130                                  uint32_t infoFlags,
 131                                  CVImageBufferRef image_buffer)
 132 {
 133     struct vda_context *vda_ctx = vda_hw_ctx;
 134
 135     if (!image_buffer)
 136         return;
 137
 138     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
 139         return;
 140
 141     if (vda_ctx->use_sync_decoding) {
 142         vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
 143     } else {
 144         vda_frame *new_frame;
 145         vda_frame *queue_walker;
 146
 147         if (!(new_frame = av_mallocz(sizeof(*new_frame))))
 148             return;
 149         new_frame->next_frame = NULL;
 150         new_frame->cv_buffer  = CVPixelBufferRetain(image_buffer);
 151         new_frame->pts        = vda_pts_from_dictionary(user_info);
 152
 153         pthread_mutex_lock(&vda_ctx->queue_mutex);
 154
 155         queue_walker = vda_ctx->queue;
 156
 157         if (!queue_walker || new_frame->pts < queue_walker->pts) {
 158             /* we have an empty queue, or this frame earlier than the current queue head */
 159             new_frame->next_frame = queue_walker;
 160             vda_ctx->queue        = new_frame;
 161         } else {
 162             /* walk the queue and insert this frame where it belongs in display order */
 163             vda_frame *next_frame;
 164             while (1) {
 165                 next_frame = queue_walker->next_frame;
 166                 if (!next_frame || new_frame->pts < next_frame->pts) {
 167                     new_frame->next_frame    = next_frame;
 168                     queue_walker->next_frame = new_frame;
 169                     break;
 170                 }
 171                 queue_walker = next_frame;
 172             }
 173         }
 174
 175         pthread_mutex_unlock(&vda_ctx->queue_mutex);
 176     }
 177 }
 178
 179 static int vda_sync_decode(struct vda_context *vda_ctx)
 180 {
 181     OSStatus status;
 182     CFDataRef coded_frame;
 183     uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
 184
 185     coded_frame = CFDataCreate(kCFAllocatorDefault,
 186                                vda_ctx->priv_bitstream,
 187                                vda_ctx->priv_bitstream_size);
 188
 189     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
 190
 191     if (kVDADecoderNoErr == status)
 192         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
 193
 194     CFRelease(coded_frame);
 195
 196     return status;
 197 }
 198
 199
 200 static int start_frame(AVCodecContext *avctx,
 201                        av_unused const uint8_t *buffer,
 202                        av_unused uint32_t size)
 203 {
 204     struct vda_context *vda_ctx         = avctx->hwaccel_context;
 205
 206     if (!vda_ctx->decoder)
 207         return -1;
 208
 209     vda_ctx->priv_bitstream_size = 0;
 210
 211     return 0;
 212 }
 213
 214 static int decode_slice(AVCodecContext *avctx,
 215                         const uint8_t *buffer,
 216                         uint32_t size)
 217 {
 218     struct vda_context *vda_ctx         = avctx->hwaccel_context;
 219     void *tmp;
 220
 221     if (!vda_ctx->decoder)
 222         return -1;
 223
 224     tmp = av_fast_realloc(vda_ctx->priv_bitstream,
 225                           &vda_ctx->priv_allocated_size,
 226                           vda_ctx->priv_bitstream_size + size + 4);
 227     if (!tmp)
 228         return AVERROR(ENOMEM);
 229
 230     vda_ctx->priv_bitstream = tmp;
 231
 232     AV_WB32(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size, size);
 233     memcpy(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size + 4, buffer, size);
 234
 235     vda_ctx->priv_bitstream_size += size + 4;
 236
 237     return 0;
 238 }
 239
 240 static int end_frame(AVCodecContext *avctx)
 241 {
 242     H264Context *h                      = avctx->priv_data;
 243     struct vda_context *vda_ctx         = avctx->hwaccel_context;
 244     AVFrame *frame                      = &h->s.current_picture_ptr->f;
 245     int status;
 246
 247     if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
 248         return -1;
 249
 250     if (vda_ctx->use_sync_decoding) {
 251         status = vda_sync_decode(vda_ctx);
 252         frame->data[3] = (void*)vda_ctx->cv_buffer;
 253     } else {
 254         status = vda_decoder_decode(vda_ctx, vda_ctx->priv_bitstream,
 255                                     vda_ctx->priv_bitstream_size,
 256                                     frame->reordered_opaque);
 257     }
 258
 259     if (status)
 260         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
 261
 262     return status;
 263 }
 264
 265 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 266                           uint8_t *extradata,
 267                           int extradata_size)
 268 {
 269     OSStatus status = kVDADecoderNoErr;
 270     CFNumberRef height;
 271     CFNumberRef width;
 272     CFNumberRef format;
 273     CFDataRef avc_data;
 274     CFMutableDictionaryRef config_info;
 275     CFMutableDictionaryRef buffer_attributes;
 276     CFMutableDictionaryRef io_surface_properties;
 277     CFNumberRef cv_pix_fmt;
 278
 279 #if FF_API_VDA_ASYNC
 280     pthread_mutex_init(&vda_ctx->queue_mutex, NULL);
 281 #endif
 282
 283     /* Each VCL NAL in the bistream sent to the decoder
 284      * is preceeded by a 4 bytes length header.
 285      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 286     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
 287         uint8_t *rw_extradata;
 288
 289         if (!(rw_extradata = av_malloc(extradata_size)))
 290             return AVERROR(ENOMEM);
 291
 292         memcpy(rw_extradata, extradata, extradata_size);
 293
 294         rw_extradata[4] |= 0x03;
 295
 296         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
 297
 298         av_freep(&rw_extradata);
 299     } else {
 300         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 301     }
 302
 303     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 304                                             4,
 305                                             &kCFTypeDictionaryKeyCallBacks,
 306                                             &kCFTypeDictionaryValueCallBacks);
 307
 308     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 309     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 310     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 311
 312     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 313     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 314     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 315     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 316
 317     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 318                                                   2,
 319                                                   &kCFTypeDictionaryKeyCallBacks,
 320                                                   &kCFTypeDictionaryValueCallBacks);
 321     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 322                                                       0,
 323                                                       &kCFTypeDictionaryKeyCallBacks,
 324                                                       &kCFTypeDictionaryValueCallBacks);
 325     cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
 326                                      kCFNumberSInt32Type,
 327                                      &vda_ctx->cv_pix_fmt_type);
 328     CFDictionarySetValue(buffer_attributes,
 329                          kCVPixelBufferPixelFormatTypeKey,
 330                          cv_pix_fmt);
 331     CFDictionarySetValue(buffer_attributes,
 332                          kCVPixelBufferIOSurfacePropertiesKey,
 333                          io_surface_properties);
 334
 335     status = VDADecoderCreate(config_info,
 336                               buffer_attributes,
 337                               vda_decoder_callback,
 338                               vda_ctx,
 339                               &vda_ctx->decoder);
 340
 341     CFRelease(height);
 342     CFRelease(width);
 343     CFRelease(format);
 344     CFRelease(avc_data);
 345     CFRelease(config_info);
 346     CFRelease(io_surface_properties);
 347     CFRelease(cv_pix_fmt);
 348     CFRelease(buffer_attributes);
 349
 350     return status;
 351 }
 352
 353 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 354 {
 355     OSStatus status = kVDADecoderNoErr;
 356
 357     if (vda_ctx->decoder)
 358         status = VDADecoderDestroy(vda_ctx->decoder);
 359
 360 #if FF_API_VDA_ASYNC
 361     vda_clear_queue(vda_ctx);
 362     pthread_mutex_destroy(&vda_ctx->queue_mutex);
 363 #endif
 364
 365     av_freep(&vda_ctx->priv_bitstream);
 366
 367     return status;
 368 }
 369
 370 AVHWAccel ff_h264_vda_hwaccel = {
 371     .name           = "h264_vda",
 372     .type           = AVMEDIA_TYPE_VIDEO,
 373     .id             = AV_CODEC_ID_H264,
 374     .pix_fmt        = AV_PIX_FMT_VDA_VLD,
 375     .start_frame    = start_frame,
 376     .decode_slice   = decode_slice,
 377     .end_frame      = end_frame,
 378 };