FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
videotoolbox.c
Go to the documentation of this file.
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 #if CONFIG_VIDEOTOOLBOX
25 # include "videotoolbox.h"
26 #else
27 # include "vda.h"
28 #endif
29 #include "vda_vt_internal.h"
30 #include "libavutil/avutil.h"
31 #include "bytestream.h"
32 #include "h264.h"
33 #include "mpegvideo.h"
34 
35 #ifndef kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder
36 # define kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder CFSTR("RequireHardwareAcceleratedVideoDecoder")
37 #endif
38 
39 #define VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING 12
40 
41 static void videotoolbox_buffer_release(void *opaque, uint8_t *data)
42 {
43  CVPixelBufferRef cv_buffer = (CVImageBufferRef)data;
44  CVPixelBufferRelease(cv_buffer);
45 }
46 
48  const uint8_t *buffer,
49  uint32_t size)
50 {
51  void *tmp;
52 
53  tmp = av_fast_realloc(vtctx->bitstream,
54  &vtctx->allocated_size,
55  size);
56 
57  if (!tmp)
58  return AVERROR(ENOMEM);
59 
60  vtctx->bitstream = tmp;
61  memcpy(vtctx->bitstream, buffer, size);
62  vtctx->bitstream_size = size;
63 
64  return 0;
65 }
66 
68 {
69  frame->width = avctx->width;
70  frame->height = avctx->height;
71  frame->format = avctx->pix_fmt;
72  frame->buf[0] = av_buffer_alloc(1);
73 
74  if (!frame->buf[0])
75  return AVERROR(ENOMEM);
76 
77  return 0;
78 }
79 
80 #define AV_W8(p, v) *(p) = (v)
81 
83 {
84  H264Context *h = avctx->priv_data;
85  CFDataRef data = NULL;
86  uint8_t *p;
87  int vt_extradata_size = 6 + 3 + h->sps.data_size + 4 + h->pps.data_size;
88  uint8_t *vt_extradata = av_malloc(vt_extradata_size);
89  if (!vt_extradata)
90  return NULL;
91 
92  p = vt_extradata;
93 
94  AV_W8(p + 0, 1); /* version */
95  AV_W8(p + 1, h->sps.data[0]); /* profile */
96  AV_W8(p + 2, h->sps.data[1]); /* profile compat */
97  AV_W8(p + 3, h->sps.data[2]); /* level */
98  AV_W8(p + 4, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 3 (11) */
99  AV_W8(p + 5, 0xe1); /* 3 bits reserved (111) + 5 bits number of sps (00001) */
100  AV_WB16(p + 6, h->sps.data_size + 1);
101  AV_W8(p + 8, NAL_SPS | (3 << 5)); // NAL unit header
102  memcpy(p + 9, h->sps.data, h->sps.data_size);
103  p += 9 + h->sps.data_size;
104  AV_W8(p + 0, 1); /* number of pps */
105  AV_WB16(p + 1, h->pps.data_size + 1);
106  AV_W8(p + 3, NAL_PPS | (3 << 5)); // NAL unit header
107  memcpy(p + 4, h->pps.data, h->pps.data_size);
108 
109  p += 4 + h->pps.data_size;
110  av_assert0(p - vt_extradata == vt_extradata_size);
111 
112  data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
113  av_free(vt_extradata);
114  return data;
115 }
116 
118 {
119  av_buffer_unref(&frame->buf[0]);
120 
121  frame->buf[0] = av_buffer_create((uint8_t*)vtctx->frame,
122  sizeof(vtctx->frame),
124  NULL,
126  if (!frame->buf[0]) {
127  return AVERROR(ENOMEM);
128  }
129 
130  frame->data[3] = (uint8_t*)vtctx->frame;
131  vtctx->frame = NULL;
132 
133  return 0;
134 }
135 
137  const uint8_t *buffer,
138  uint32_t size)
139 {
140  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
141  H264Context *h = avctx->priv_data;
142 
143  vtctx->bitstream_size = 0;
144 
145  if (h->is_avc == 1) {
146  return videotoolbox_buffer_copy(vtctx, buffer, size);
147  }
148 
149  return 0;
150 }
151 
153  const uint8_t *buffer,
154  uint32_t size)
155 {
156  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
157  H264Context *h = avctx->priv_data;
158  void *tmp;
159 
160  if (h->is_avc == 1)
161  return 0;
162 
163  tmp = av_fast_realloc(vtctx->bitstream,
164  &vtctx->allocated_size,
165  vtctx->bitstream_size+size+4);
166  if (!tmp)
167  return AVERROR(ENOMEM);
168 
169  vtctx->bitstream = tmp;
170 
171  AV_WB32(vtctx->bitstream + vtctx->bitstream_size, size);
172  memcpy(vtctx->bitstream + vtctx->bitstream_size + 4, buffer, size);
173 
174  vtctx->bitstream_size += size + 4;
175 
176  return 0;
177 }
178 
180 {
181  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
182  if (vtctx) {
183  av_freep(&vtctx->bitstream);
184  if (vtctx->frame)
185  CVPixelBufferRelease(vtctx->frame);
186  }
187 
188  return 0;
189 }
190 
191 #if CONFIG_VIDEOTOOLBOX
192 static void videotoolbox_write_mp4_descr_length(PutByteContext *pb, int length)
193 {
194  int i;
195  uint8_t b;
196 
197  for (i = 3; i >= 0; i--) {
198  b = (length >> (i * 7)) & 0x7F;
199  if (i != 0)
200  b |= 0x80;
201 
202  bytestream2_put_byteu(pb, b);
203  }
204 }
205 
206 static CFDataRef videotoolbox_esds_extradata_create(AVCodecContext *avctx)
207 {
208  CFDataRef data;
209  uint8_t *rw_extradata;
210  PutByteContext pb;
211  int full_size = 3 + 5 + 13 + 5 + avctx->extradata_size + 3;
212  // ES_DescrTag data + DecoderConfigDescrTag + data + DecSpecificInfoTag + size + SLConfigDescriptor
213  int config_size = 13 + 5 + avctx->extradata_size;
214  int s;
215 
216  if (!(rw_extradata = av_mallocz(full_size + VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING)))
217  return NULL;
218 
219  bytestream2_init_writer(&pb, rw_extradata, full_size + VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING);
220  bytestream2_put_byteu(&pb, 0); // version
221  bytestream2_put_ne24(&pb, 0); // flags
222 
223  // elementary stream descriptor
224  bytestream2_put_byteu(&pb, 0x03); // ES_DescrTag
225  videotoolbox_write_mp4_descr_length(&pb, full_size);
226  bytestream2_put_ne16(&pb, 0); // esid
227  bytestream2_put_byteu(&pb, 0); // stream priority (0-32)
228 
229  // decoder configuration descriptor
230  bytestream2_put_byteu(&pb, 0x04); // DecoderConfigDescrTag
231  videotoolbox_write_mp4_descr_length(&pb, config_size);
232  bytestream2_put_byteu(&pb, 32); // object type indication. 32 = AV_CODEC_ID_MPEG4
233  bytestream2_put_byteu(&pb, 0x11); // stream type
234  bytestream2_put_ne24(&pb, 0); // buffer size
235  bytestream2_put_ne32(&pb, 0); // max bitrate
236  bytestream2_put_ne32(&pb, 0); // avg bitrate
237 
238  // decoder specific descriptor
239  bytestream2_put_byteu(&pb, 0x05); ///< DecSpecificInfoTag
240  videotoolbox_write_mp4_descr_length(&pb, avctx->extradata_size);
241 
242  bytestream2_put_buffer(&pb, avctx->extradata, avctx->extradata_size);
243 
244  // SLConfigDescriptor
245  bytestream2_put_byteu(&pb, 0x06); // SLConfigDescrTag
246  bytestream2_put_byteu(&pb, 0x01); // length
247  bytestream2_put_byteu(&pb, 0x02); //
248 
249  s = bytestream2_size_p(&pb);
250 
251  data = CFDataCreate(kCFAllocatorDefault, rw_extradata, s);
252 
253  av_freep(&rw_extradata);
254  return data;
255 }
256 
257 static CMSampleBufferRef videotoolbox_sample_buffer_create(CMFormatDescriptionRef fmt_desc,
258  void *buffer,
259  int size)
260 {
261  OSStatus status;
262  CMBlockBufferRef block_buf;
263  CMSampleBufferRef sample_buf;
264 
265  block_buf = NULL;
266  sample_buf = NULL;
267 
268  status = CMBlockBufferCreateWithMemoryBlock(kCFAllocatorDefault,// structureAllocator
269  buffer, // memoryBlock
270  size, // blockLength
271  kCFAllocatorNull, // blockAllocator
272  NULL, // customBlockSource
273  0, // offsetToData
274  size, // dataLength
275  0, // flags
276  &block_buf);
277 
278  if (!status) {
279  status = CMSampleBufferCreate(kCFAllocatorDefault, // allocator
280  block_buf, // dataBuffer
281  TRUE, // dataReady
282  0, // makeDataReadyCallback
283  0, // makeDataReadyRefcon
284  fmt_desc, // formatDescription
285  1, // numSamples
286  0, // numSampleTimingEntries
287  NULL, // sampleTimingArray
288  0, // numSampleSizeEntries
289  NULL, // sampleSizeArray
290  &sample_buf);
291  }
292 
293  if (block_buf)
294  CFRelease(block_buf);
295 
296  return sample_buf;
297 }
298 
299 static void videotoolbox_decoder_callback(void *opaque,
300  void *sourceFrameRefCon,
301  OSStatus status,
302  VTDecodeInfoFlags flags,
303  CVImageBufferRef image_buffer,
304  CMTime pts,
305  CMTime duration)
306 {
307  AVCodecContext *avctx = opaque;
308  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
309 
310  if (vtctx->frame) {
311  CVPixelBufferRelease(vtctx->frame);
312  vtctx->frame = NULL;
313  }
314 
315  if (!image_buffer) {
316  av_log(NULL, AV_LOG_DEBUG, "vt decoder cb: output image buffer is null\n");
317  return;
318  }
319 
320  vtctx->frame = CVPixelBufferRetain(image_buffer);
321 }
322 
323 static OSStatus videotoolbox_session_decode_frame(AVCodecContext *avctx)
324 {
325  OSStatus status;
326  CMSampleBufferRef sample_buf;
327  AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
328  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
329 
330  sample_buf = videotoolbox_sample_buffer_create(videotoolbox->cm_fmt_desc,
331  vtctx->bitstream,
332  vtctx->bitstream_size);
333 
334  if (!sample_buf)
335  return -1;
336 
337  status = VTDecompressionSessionDecodeFrame(videotoolbox->session,
338  sample_buf,
339  0, // decodeFlags
340  NULL, // sourceFrameRefCon
341  0); // infoFlagsOut
342  if (status == noErr)
343  status = VTDecompressionSessionWaitForAsynchronousFrames(videotoolbox->session);
344 
345  CFRelease(sample_buf);
346 
347  return status;
348 }
349 
350 static int videotoolbox_common_end_frame(AVCodecContext *avctx, AVFrame *frame)
351 {
352  int status;
353  AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
354  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
355 
356  av_buffer_unref(&frame->buf[0]);
357 
358  if (!videotoolbox->session || !vtctx->bitstream)
359  return AVERROR_INVALIDDATA;
360 
361  status = videotoolbox_session_decode_frame(avctx);
362 
363  if (status) {
364  av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
365  return AVERROR_UNKNOWN;
366  }
367 
368  if (!vtctx->frame)
369  return AVERROR_UNKNOWN;
370 
371  return ff_videotoolbox_buffer_create(vtctx, frame);
372 }
373 
374 static int videotoolbox_h264_end_frame(AVCodecContext *avctx)
375 {
376  H264Context *h = avctx->priv_data;
377  AVFrame *frame = h->cur_pic_ptr->f;
378 
379  return videotoolbox_common_end_frame(avctx, frame);
380 }
381 
382 static int videotoolbox_mpeg_start_frame(AVCodecContext *avctx,
383  const uint8_t *buffer,
384  uint32_t size)
385 {
386  VTContext *vtctx = avctx->internal->hwaccel_priv_data;
387 
388  return videotoolbox_buffer_copy(vtctx, buffer, size);
389 }
390 
391 static int videotoolbox_mpeg_decode_slice(AVCodecContext *avctx,
392  const uint8_t *buffer,
393  uint32_t size)
394 {
395  return 0;
396 }
397 
398 static int videotoolbox_mpeg_end_frame(AVCodecContext *avctx)
399 {
400  MpegEncContext *s = avctx->priv_data;
401  AVFrame *frame = s->current_picture_ptr->f;
402 
403  return videotoolbox_common_end_frame(avctx, frame);
404 }
405 
406 static CFDictionaryRef videotoolbox_decoder_config_create(CMVideoCodecType codec_type,
407  AVCodecContext *avctx)
408 {
409  CFMutableDictionaryRef config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
410  1,
411  &kCFTypeDictionaryKeyCallBacks,
412  &kCFTypeDictionaryValueCallBacks);
413 
414  CFDictionarySetValue(config_info,
416  kCFBooleanTrue);
417 
418  if (avctx->extradata_size) {
419  CFMutableDictionaryRef avc_info;
420  CFDataRef data = NULL;
421 
422  avc_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
423  1,
424  &kCFTypeDictionaryKeyCallBacks,
425  &kCFTypeDictionaryValueCallBacks);
426 
427  switch (codec_type) {
428  case kCMVideoCodecType_MPEG4Video :
429  data = videotoolbox_esds_extradata_create(avctx);
430  if (data)
431  CFDictionarySetValue(avc_info, CFSTR("esds"), data);
432  break;
433  case kCMVideoCodecType_H264 :
435  if (data)
436  CFDictionarySetValue(avc_info, CFSTR("avcC"), data);
437  break;
438  default:
439  break;
440  }
441 
442  CFDictionarySetValue(config_info,
443  kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms,
444  avc_info);
445 
446  if (data)
447  CFRelease(data);
448 
449  CFRelease(avc_info);
450  }
451  return config_info;
452 }
453 
454 static CFDictionaryRef videotoolbox_buffer_attributes_create(int width,
455  int height,
456  OSType pix_fmt)
457 {
458  CFMutableDictionaryRef buffer_attributes;
459  CFMutableDictionaryRef io_surface_properties;
460  CFNumberRef cv_pix_fmt;
461  CFNumberRef w;
462  CFNumberRef h;
463 
464  w = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &width);
465  h = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &height);
466  cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &pix_fmt);
467 
468  buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
469  4,
470  &kCFTypeDictionaryKeyCallBacks,
471  &kCFTypeDictionaryValueCallBacks);
472  io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
473  0,
474  &kCFTypeDictionaryKeyCallBacks,
475  &kCFTypeDictionaryValueCallBacks);
476 
477  CFDictionarySetValue(buffer_attributes, kCVPixelBufferPixelFormatTypeKey, cv_pix_fmt);
478  CFDictionarySetValue(buffer_attributes, kCVPixelBufferIOSurfacePropertiesKey, io_surface_properties);
479  CFDictionarySetValue(buffer_attributes, kCVPixelBufferWidthKey, w);
480  CFDictionarySetValue(buffer_attributes, kCVPixelBufferHeightKey, h);
481 
482  CFRelease(io_surface_properties);
483  CFRelease(cv_pix_fmt);
484  CFRelease(w);
485  CFRelease(h);
486 
487  return buffer_attributes;
488 }
489 
490 static CMVideoFormatDescriptionRef videotoolbox_format_desc_create(CMVideoCodecType codec_type,
491  CFDictionaryRef decoder_spec,
492  int width,
493  int height)
494 {
495  CMFormatDescriptionRef cm_fmt_desc;
496  OSStatus status;
497 
498  status = CMVideoFormatDescriptionCreate(kCFAllocatorDefault,
499  codec_type,
500  width,
501  height,
502  decoder_spec, // Dictionary of extension
503  &cm_fmt_desc);
504 
505  if (status)
506  return NULL;
507 
508  return cm_fmt_desc;
509 }
510 
511 static int videotoolbox_default_init(AVCodecContext *avctx)
512 {
513  AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
514  OSStatus status;
515  VTDecompressionOutputCallbackRecord decoder_cb;
516  CFDictionaryRef decoder_spec;
517  CFDictionaryRef buf_attr;
518 
519  if (!videotoolbox) {
520  av_log(avctx, AV_LOG_ERROR, "hwaccel context is not set\n");
521  return -1;
522  }
523 
524  switch( avctx->codec_id ) {
525  case AV_CODEC_ID_H263 :
526  videotoolbox->cm_codec_type = kCMVideoCodecType_H263;
527  break;
528  case AV_CODEC_ID_H264 :
529  videotoolbox->cm_codec_type = kCMVideoCodecType_H264;
530  break;
532  videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG1Video;
533  break;
535  videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG2Video;
536  break;
537  case AV_CODEC_ID_MPEG4 :
538  videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG4Video;
539  break;
540  default :
541  break;
542  }
543 
544  decoder_spec = videotoolbox_decoder_config_create(videotoolbox->cm_codec_type, avctx);
545 
546  videotoolbox->cm_fmt_desc = videotoolbox_format_desc_create(videotoolbox->cm_codec_type,
547  decoder_spec,
548  avctx->width,
549  avctx->height);
550  if (!videotoolbox->cm_fmt_desc) {
551  if (decoder_spec)
552  CFRelease(decoder_spec);
553 
554  av_log(avctx, AV_LOG_ERROR, "format description creation failed\n");
555  return -1;
556  }
557 
558  buf_attr = videotoolbox_buffer_attributes_create(avctx->width,
559  avctx->height,
560  videotoolbox->cv_pix_fmt_type);
561 
562  decoder_cb.decompressionOutputCallback = videotoolbox_decoder_callback;
563  decoder_cb.decompressionOutputRefCon = avctx;
564 
565  status = VTDecompressionSessionCreate(NULL, // allocator
566  videotoolbox->cm_fmt_desc, // videoFormatDescription
567  decoder_spec, // videoDecoderSpecification
568  buf_attr, // destinationImageBufferAttributes
569  &decoder_cb, // outputCallback
570  &videotoolbox->session); // decompressionSessionOut
571 
572  if (decoder_spec)
573  CFRelease(decoder_spec);
574  if (buf_attr)
575  CFRelease(buf_attr);
576 
577  switch (status) {
578  case kVTVideoDecoderNotAvailableNowErr:
579  case kVTVideoDecoderUnsupportedDataFormatErr:
580  return AVERROR(ENOSYS);
581  case kVTVideoDecoderMalfunctionErr:
582  return AVERROR(EINVAL);
583  case kVTVideoDecoderBadDataErr :
584  return AVERROR_INVALIDDATA;
585  case 0:
586  return 0;
587  default:
588  return AVERROR_UNKNOWN;
589  }
590 }
591 
592 static void videotoolbox_default_free(AVCodecContext *avctx)
593 {
594  AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
595 
596  if (videotoolbox) {
597  if (videotoolbox->cm_fmt_desc)
598  CFRelease(videotoolbox->cm_fmt_desc);
599 
600  if (videotoolbox->session)
601  VTDecompressionSessionInvalidate(videotoolbox->session);
602  }
603 }
604 
605 AVHWAccel ff_h263_videotoolbox_hwaccel = {
606  .name = "h263_videotoolbox",
607  .type = AVMEDIA_TYPE_VIDEO,
608  .id = AV_CODEC_ID_H263,
609  .pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
610  .alloc_frame = ff_videotoolbox_alloc_frame,
611  .start_frame = videotoolbox_mpeg_start_frame,
612  .decode_slice = videotoolbox_mpeg_decode_slice,
613  .end_frame = videotoolbox_mpeg_end_frame,
614  .uninit = ff_videotoolbox_uninit,
615  .priv_data_size = sizeof(VTContext),
616 };
617 
618 AVHWAccel ff_h264_videotoolbox_hwaccel = {
619  .name = "h264_videotoolbox",
620  .type = AVMEDIA_TYPE_VIDEO,
621  .id = AV_CODEC_ID_H264,
622  .pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
623  .alloc_frame = ff_videotoolbox_alloc_frame,
624  .start_frame = ff_videotoolbox_h264_start_frame,
625  .decode_slice = ff_videotoolbox_h264_decode_slice,
626  .end_frame = videotoolbox_h264_end_frame,
627  .uninit = ff_videotoolbox_uninit,
628  .priv_data_size = sizeof(VTContext),
629 };
630 
631 AVHWAccel ff_mpeg1_videotoolbox_hwaccel = {
632  .name = "mpeg1_videotoolbox",
633  .type = AVMEDIA_TYPE_VIDEO,
635  .pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
636  .alloc_frame = ff_videotoolbox_alloc_frame,
637  .start_frame = videotoolbox_mpeg_start_frame,
638  .decode_slice = videotoolbox_mpeg_decode_slice,
639  .end_frame = videotoolbox_mpeg_end_frame,
640  .uninit = ff_videotoolbox_uninit,
641  .priv_data_size = sizeof(VTContext),
642 };
643 
644 AVHWAccel ff_mpeg2_videotoolbox_hwaccel = {
645  .name = "mpeg2_videotoolbox",
646  .type = AVMEDIA_TYPE_VIDEO,
648  .pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
649  .alloc_frame = ff_videotoolbox_alloc_frame,
650  .start_frame = videotoolbox_mpeg_start_frame,
651  .decode_slice = videotoolbox_mpeg_decode_slice,
652  .end_frame = videotoolbox_mpeg_end_frame,
653  .uninit = ff_videotoolbox_uninit,
654  .priv_data_size = sizeof(VTContext),
655 };
656 
657 AVHWAccel ff_mpeg4_videotoolbox_hwaccel = {
658  .name = "mpeg4_videotoolbox",
659  .type = AVMEDIA_TYPE_VIDEO,
660  .id = AV_CODEC_ID_MPEG4,
661  .pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
662  .alloc_frame = ff_videotoolbox_alloc_frame,
663  .start_frame = videotoolbox_mpeg_start_frame,
664  .decode_slice = videotoolbox_mpeg_decode_slice,
665  .end_frame = videotoolbox_mpeg_end_frame,
666  .uninit = ff_videotoolbox_uninit,
667  .priv_data_size = sizeof(VTContext),
668 };
669 
671 {
672  AVVideotoolboxContext *ret = av_mallocz(sizeof(*ret));
673 
674  if (ret) {
675  ret->output_callback = videotoolbox_decoder_callback;
676  ret->cv_pix_fmt_type = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
677  }
678 
679  return ret;
680 }
681 
683 {
684  return av_videotoolbox_default_init2(avctx, NULL);
685 }
686 
688 {
690  if (!avctx->hwaccel_context)
691  return AVERROR(ENOMEM);
692  return videotoolbox_default_init(avctx);
693 }
694 
696 {
697 
698  videotoolbox_default_free(avctx);
699  av_freep(&avctx->hwaccel_context);
700 }
701 #endif /* CONFIG_VIDEOTOOLBOX */
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static enum AVPixelFormat pix_fmt
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:124
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
Definition: h264.h:120
uint8_t * bitstream
int cm_codec_type
CoreMedia codec type that Videotoolbox will use to create the decompression session.
Definition: videotoolbox.h:75
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:357
hardware decoding through Videotoolbox
Definition: pixfmt.h:290
AVVideotoolboxContext * av_videotoolbox_alloc_context(void)
Allocate and initialize a Videotoolbox context.
const char * b
Definition: vf_curves.c:109
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
Definition: bytestream.h:143
enum AVMediaType codec_type
Definition: rtp.c:37
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
external API header
int is_avc
Used to parse AVC variant of h264.
Definition: h264.h:637
mpegvideo header.
H264Context.
Definition: h264.h:522
int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: videotoolbox.c:136
AVFrame * f
Definition: h264.h:315
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AV_W8(p, v)
Definition: videotoolbox.c:80
int ff_videotoolbox_buffer_create(VTContext *vtctx, AVFrame *frame)
Definition: videotoolbox.c:117
uint8_t
#define av_malloc(s)
void * hwaccel_context
Hardware accelerator context.
Definition: avcodec.h:2855
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
static AVFrame * frame
CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx)
Definition: videotoolbox.c:82
int av_videotoolbox_default_init(AVCodecContext *avctx)
This is a convenience function that creates and sets up the Videotoolbox context using an internal im...
#define AV_BUFFER_FLAG_READONLY
Always treat the buffer as read-only, even when it has only one reference.
Definition: buffer.h:113
ptrdiff_t size
Definition: opengl_enc.c:101
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define av_log(a,...)
static int videotoolbox_buffer_copy(VTContext *vtctx, const uint8_t *buffer, uint32_t size)
Definition: videotoolbox.c:47
H.264 / AVC / MPEG4 part10 codec.
int width
width and height of the video frame
Definition: frame.h:230
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
Definition: mem.c:480
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int allocated_size
PPS pps
current pps
Definition: h264.h:582
GLsizei GLsizei * length
Definition: opengl_enc.c:115
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:28
VTDecompressionSessionRef session
Videotoolbox decompression session object.
Definition: videotoolbox.h:51
size_t data_size
Definition: h264.h:234
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3503
uint8_t data[4096]
Definition: h264.h:260
int width
picture width / height.
Definition: avcodec.h:1711
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
SPS sps
current sps
Definition: h264.h:581
int64_t duration
Definition: movenc-test.c:63
#define TRUE
Definition: windows2linux.h:33
int bitstream_size
static av_always_inline unsigned int bytestream2_put_buffer(PutByteContext *p, const uint8_t *src, unsigned int size)
Definition: bytestream.h:282
Definition: h264.h:119
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:106
int av_videotoolbox_default_init2(AVCodecContext *avctx, AVVideotoolboxContext *vtctx)
This is a convenience function that creates and sets up the Videotoolbox context using an internal im...
#define kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder
Definition: videotoolbox.c:36
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:242
enum AVCodecID codec_id
Definition: avcodec.h:1549
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
Public libavcodec VDA header.
#define bytestream2_put_ne24
Definition: bytestream.h:124
main external API structure.
Definition: avcodec.h:1532
int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: videotoolbox.c:152
CMVideoFormatDescriptionRef cm_fmt_desc
CoreMedia Format Description that Videotoolbox will use to create the decompression session...
Definition: videotoolbox.h:69
int extradata_size
Definition: avcodec.h:1648
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
struct AVFrame * f
Definition: mpegpicture.h:46
H264Picture * cur_pic_ptr
Definition: h264.h:532
OSType cv_pix_fmt_type
CVPixelBuffer Format Type that Videotoolbox will use for decoded frames.
Definition: videotoolbox.h:63
static int64_t pts
Global timestamp for the audio frames.
int ff_videotoolbox_uninit(AVCodecContext *avctx)
Definition: videotoolbox.c:179
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
MpegEncContext.
Definition: mpegvideo.h:78
VTDecompressionOutputCallback output_callback
The output callback that must be passed to the session.
Definition: videotoolbox.h:57
uint8_t data[4096]
Definition: h264.h:233
size_t data_size
Definition: h264.h:261
void * hwaccel_priv_data
hwaccel-specific private data
Definition: internal.h:162
#define VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING
Definition: videotoolbox.c:39
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: videotoolbox.c:67
void * priv_data
Definition: avcodec.h:1574
#define av_free(p)
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1582
#define bytestream2_put_ne32
Definition: bytestream.h:125
int height
Definition: frame.h:230
static void videotoolbox_buffer_release(void *opaque, uint8_t *data)
Definition: videotoolbox.c:41
#define av_freep(p)
void av_videotoolbox_default_free(AVCodecContext *avctx)
This function must be called to free the Videotoolbox context initialized with av_videotoolbox_defaul...
#define bytestream2_put_ne16
Definition: bytestream.h:123
This struct holds all the information that needs to be passed between the caller and libavcodec for i...
Definition: videotoolbox.h:46
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
static av_always_inline int bytestream2_size_p(PutByteContext *p)
Definition: bytestream.h:203
GLuint buffer
Definition: opengl_enc.c:102
CVImageBufferRef frame
Public libavcodec Videotoolbox header.
static int width