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vda_h264.c
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1 /*
2  * VDA H264 HW acceleration.
3  *
4  * copyright (c) 2011 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 <CoreFoundation/CFDictionary.h>
24 #include <CoreFoundation/CFNumber.h>
25 #include <CoreFoundation/CFData.h>
26 
27 #include "vda.h"
28 #include "libavutil/avutil.h"
29 #include "h264.h"
30 
31 struct vda_buffer {
32  CVPixelBufferRef cv_buffer;
33 };
34 #include "internal.h"
35 #include "vda_internal.h"
36 
37 typedef struct VDAContext {
38  // The current bitstream buffer.
39  uint8_t *bitstream;
40 
41  // The current size of the bitstream.
42  int bitstream_size;
43 
44  // The reference size used for fast reallocation.
45  int allocated_size;
46 
47  CVImageBufferRef frame;
48 } VDAContext;
49 
50 /* Decoder callback that adds the vda frame to the queue in display order. */
51 static void vda_decoder_callback(void *vda_hw_ctx,
52  CFDictionaryRef user_info,
53  OSStatus status,
54  uint32_t infoFlags,
55  CVImageBufferRef image_buffer)
56 {
57  struct vda_context *vda_ctx = vda_hw_ctx;
58 
59  if (infoFlags & kVDADecodeInfo_FrameDropped)
60  vda_ctx->cv_buffer = NULL;
61 
62  if (!image_buffer)
63  return;
64 
65  if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
66  return;
67 
68  vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
69 }
70 
71 static int vda_sync_decode(VDAContext *ctx, struct vda_context *vda_ctx)
72 {
73  OSStatus status;
74  CFDataRef coded_frame;
75  uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
76 
77  coded_frame = CFDataCreate(kCFAllocatorDefault,
78  ctx->bitstream,
79  ctx->bitstream_size);
80 
81  status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
82 
83  if (kVDADecoderNoErr == status)
84  status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
85 
86  CFRelease(coded_frame);
87 
88  return status;
89 }
90 
91 
92 static int vda_old_h264_start_frame(AVCodecContext *avctx,
93  av_unused const uint8_t *buffer,
94  av_unused uint32_t size)
95 {
96  VDAContext *vda = avctx->internal->hwaccel_priv_data;
97  struct vda_context *vda_ctx = avctx->hwaccel_context;
98 
99  if (!vda_ctx->decoder)
100  return -1;
101 
102  vda->bitstream_size = 0;
103 
104  return 0;
105 }
106 
107 static int vda_old_h264_decode_slice(AVCodecContext *avctx,
108  const uint8_t *buffer,
109  uint32_t size)
110 {
111  VDAContext *vda = avctx->internal->hwaccel_priv_data;
112  struct vda_context *vda_ctx = avctx->hwaccel_context;
113  void *tmp;
114 
115  if (!vda_ctx->decoder)
116  return -1;
117 
118  tmp = av_fast_realloc(vda->bitstream,
119  &vda->allocated_size,
120  vda->bitstream_size + size + 4);
121  if (!tmp)
122  return AVERROR(ENOMEM);
123 
124  vda->bitstream = tmp;
125 
126  AV_WB32(vda->bitstream + vda->bitstream_size, size);
127  memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
128 
129  vda->bitstream_size += size + 4;
130 
131  return 0;
132 }
133 
134 static void vda_h264_release_buffer(void *opaque, uint8_t *data)
135 {
136  struct vda_buffer *context = opaque;
137  CVPixelBufferRelease(context->cv_buffer);
138  av_free(context);
139 }
140 
141 static int vda_old_h264_end_frame(AVCodecContext *avctx)
142 {
143  H264Context *h = avctx->priv_data;
144  VDAContext *vda = avctx->internal->hwaccel_priv_data;
145  struct vda_context *vda_ctx = avctx->hwaccel_context;
146  AVFrame *frame = &h->cur_pic_ptr->f;
147  struct vda_buffer *context;
148  AVBufferRef *buffer;
149  int status;
150 
151  if (!vda_ctx->decoder || !vda->bitstream)
152  return -1;
153 
154  status = vda_sync_decode(vda, vda_ctx);
155  frame->data[3] = (void*)vda_ctx->cv_buffer;
156 
157  if (status)
158  av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
159 
160  if (!vda_ctx->use_ref_buffer || status)
161  return status;
162 
163  context = av_mallocz(sizeof(*context));
164  buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
165  if (!context || !buffer) {
166  CVPixelBufferRelease(vda_ctx->cv_buffer);
167  av_free(context);
168  return -1;
169  }
170 
171  context->cv_buffer = vda_ctx->cv_buffer;
172  frame->buf[3] = buffer;
173 
174  return status;
175 }
176 
177 int ff_vda_create_decoder(struct vda_context *vda_ctx,
178  uint8_t *extradata,
179  int extradata_size)
180 {
181  OSStatus status;
182  CFNumberRef height;
183  CFNumberRef width;
184  CFNumberRef format;
185  CFDataRef avc_data;
186  CFMutableDictionaryRef config_info;
187  CFMutableDictionaryRef buffer_attributes;
188  CFMutableDictionaryRef io_surface_properties;
189  CFNumberRef cv_pix_fmt;
190 
191  vda_ctx->priv_bitstream = NULL;
192  vda_ctx->priv_allocated_size = 0;
193 
194  /* Each VCL NAL in the bitstream sent to the decoder
195  * is preceded by a 4 bytes length header.
196  * Change the avcC atom header if needed, to signal headers of 4 bytes. */
197  if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
198  uint8_t *rw_extradata;
199 
200  if (!(rw_extradata = av_malloc(extradata_size)))
201  return AVERROR(ENOMEM);
202 
203  memcpy(rw_extradata, extradata, extradata_size);
204 
205  rw_extradata[4] |= 0x03;
206 
207  avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
208 
209  av_freep(&rw_extradata);
210  } else {
211  avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
212  }
213 
214  config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
215  4,
216  &kCFTypeDictionaryKeyCallBacks,
217  &kCFTypeDictionaryValueCallBacks);
218 
219  height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
220  width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
221  format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
222 
223  CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
224  CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
225  CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
226  CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
227 
228  buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
229  2,
230  &kCFTypeDictionaryKeyCallBacks,
231  &kCFTypeDictionaryValueCallBacks);
232  io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
233  0,
234  &kCFTypeDictionaryKeyCallBacks,
235  &kCFTypeDictionaryValueCallBacks);
236  cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
237  kCFNumberSInt32Type,
238  &vda_ctx->cv_pix_fmt_type);
239  CFDictionarySetValue(buffer_attributes,
240  kCVPixelBufferPixelFormatTypeKey,
241  cv_pix_fmt);
242  CFDictionarySetValue(buffer_attributes,
243  kCVPixelBufferIOSurfacePropertiesKey,
244  io_surface_properties);
245 
246  status = VDADecoderCreate(config_info,
247  buffer_attributes,
248  (VDADecoderOutputCallback *)vda_decoder_callback,
249  vda_ctx,
250  &vda_ctx->decoder);
251 
252  CFRelease(height);
253  CFRelease(width);
254  CFRelease(format);
255  CFRelease(avc_data);
256  CFRelease(config_info);
257  CFRelease(io_surface_properties);
258  CFRelease(cv_pix_fmt);
259  CFRelease(buffer_attributes);
260 
261  return status;
262 }
263 
264 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
265 {
266  OSStatus status = kVDADecoderNoErr;
267 
268  if (vda_ctx->decoder)
269  status = VDADecoderDestroy(vda_ctx->decoder);
270 
271  return status;
272 }
273 
274 static int vda_h264_uninit(AVCodecContext *avctx)
275 {
276  VDAContext *vda = avctx->internal->hwaccel_priv_data;
277  if (vda) {
278  av_freep(&vda->bitstream);
279  if (vda->frame)
280  CVPixelBufferRelease(vda->frame);
281  }
282  return 0;
283 }
284 
285 AVHWAccel ff_h264_vda_old_hwaccel = {
286  .name = "h264_vda",
287  .type = AVMEDIA_TYPE_VIDEO,
288  .id = AV_CODEC_ID_H264,
289  .pix_fmt = AV_PIX_FMT_VDA_VLD,
290  .start_frame = vda_old_h264_start_frame,
291  .decode_slice = vda_old_h264_decode_slice,
292  .end_frame = vda_old_h264_end_frame,
293  .uninit = vda_h264_uninit,
294  .priv_data_size = sizeof(VDAContext),
295 };
296 
297 void ff_vda_output_callback(void *opaque,
298  CFDictionaryRef user_info,
299  OSStatus status,
300  uint32_t infoFlags,
301  CVImageBufferRef image_buffer)
302 {
303  AVCodecContext *ctx = opaque;
304  VDAContext *vda = ctx->internal->hwaccel_priv_data;
305 
306 
307  if (vda->frame) {
308  CVPixelBufferRelease(vda->frame);
309  vda->frame = NULL;
310  }
311 
312  if (!image_buffer)
313  return;
314 
315  vda->frame = CVPixelBufferRetain(image_buffer);
316 }
317 
318 static int vda_h264_start_frame(AVCodecContext *avctx,
319  const uint8_t *buffer,
320  uint32_t size)
321 {
322  VDAContext *vda = avctx->internal->hwaccel_priv_data;
323 
324  vda->bitstream_size = 0;
325 
326  return 0;
327 }
328 
329 static int vda_h264_decode_slice(AVCodecContext *avctx,
330  const uint8_t *buffer,
331  uint32_t size)
332 {
333  VDAContext *vda = avctx->internal->hwaccel_priv_data;
334  void *tmp;
335 
336  tmp = av_fast_realloc(vda->bitstream,
337  &vda->allocated_size,
338  vda->bitstream_size + size + 4);
339  if (!tmp)
340  return AVERROR(ENOMEM);
341 
342  vda->bitstream = tmp;
343 
344  AV_WB32(vda->bitstream + vda->bitstream_size, size);
345  memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
346 
347  vda->bitstream_size += size + 4;
348 
349  return 0;
350 }
351 
352 static void release_buffer(void *opaque, uint8_t *data)
353 {
354  CVImageBufferRef frame = (CVImageBufferRef)data;
355  CVPixelBufferRelease(frame);
356 }
357 
358 static int vda_h264_end_frame(AVCodecContext *avctx)
359 {
360  H264Context *h = avctx->priv_data;
361  VDAContext *vda = avctx->internal->hwaccel_priv_data;
362  AVVDAContext *vda_ctx = avctx->hwaccel_context;
363  AVFrame *frame = &h->cur_pic_ptr->f;
364  uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
365  CFDataRef coded_frame;
366  OSStatus status;
367 
368  if (!vda->bitstream_size)
369  return AVERROR_INVALIDDATA;
370 
371 
372  coded_frame = CFDataCreate(kCFAllocatorDefault,
373  vda->bitstream,
374  vda->bitstream_size);
375 
376  status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
377 
378  if (status == kVDADecoderNoErr)
379  status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
380 
381  CFRelease(coded_frame);
382 
383  if (!vda->frame)
384  return AVERROR_UNKNOWN;
385 
386  if (status != kVDADecoderNoErr) {
387  av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
388  return AVERROR_UNKNOWN;
389  }
390 
391  av_buffer_unref(&frame->buf[0]);
392 
393  frame->buf[0] = av_buffer_create((uint8_t*)vda->frame,
394  sizeof(vda->frame),
395  release_buffer, NULL,
396  AV_BUFFER_FLAG_READONLY);
397  if (!frame->buf)
398  return AVERROR(ENOMEM);
399 
400  frame->data[3] = (uint8_t*)vda->frame;
401  vda->frame = NULL;
402 
403  return 0;
404 }
405 
406 int ff_vda_default_init(AVCodecContext *avctx)
407 {
408  AVVDAContext *vda_ctx = avctx->hwaccel_context;
409  OSStatus status = kVDADecoderNoErr;
410  CFNumberRef height;
411  CFNumberRef width;
412  CFNumberRef format;
413  CFDataRef avc_data;
414  CFMutableDictionaryRef config_info;
415  CFMutableDictionaryRef buffer_attributes;
416  CFMutableDictionaryRef io_surface_properties;
417  CFNumberRef cv_pix_fmt;
418  int32_t fmt = 'avc1', pix_fmt = kCVPixelFormatType_422YpCbCr8;
419 
420  // kCVPixelFormatType_420YpCbCr8Planar;
421 
422  /* Each VCL NAL in the bitstream sent to the decoder
423  * is preceded by a 4 bytes length header.
424  * Change the avcC atom header if needed, to signal headers of 4 bytes. */
425  if (avctx->extradata_size >= 4 && (avctx->extradata[4] & 0x03) != 0x03) {
426  uint8_t *rw_extradata;
427 
428  if (!(rw_extradata = av_malloc(avctx->extradata_size)))
429  return AVERROR(ENOMEM);
430 
431  memcpy(rw_extradata, avctx->extradata, avctx->extradata_size);
432 
433  rw_extradata[4] |= 0x03;
434 
435  avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, avctx->extradata_size);
436 
437  av_freep(&rw_extradata);
438  } else {
439  avc_data = CFDataCreate(kCFAllocatorDefault,
440  avctx->extradata, avctx->extradata_size);
441  }
442 
443  config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
444  4,
445  &kCFTypeDictionaryKeyCallBacks,
446  &kCFTypeDictionaryValueCallBacks);
447 
448  height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->height);
449  width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->width);
450  format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &fmt);
451  CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
452  CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
453  CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
454  CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
455 
456  buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
457  2,
458  &kCFTypeDictionaryKeyCallBacks,
459  &kCFTypeDictionaryValueCallBacks);
460  io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
461  0,
462  &kCFTypeDictionaryKeyCallBacks,
463  &kCFTypeDictionaryValueCallBacks);
464  cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
465  kCFNumberSInt32Type,
466  &pix_fmt);
467 
468  CFDictionarySetValue(buffer_attributes,
469  kCVPixelBufferPixelFormatTypeKey,
470  cv_pix_fmt);
471  CFDictionarySetValue(buffer_attributes,
472  kCVPixelBufferIOSurfacePropertiesKey,
473  io_surface_properties);
474 
475  status = VDADecoderCreate(config_info,
476  buffer_attributes,
477  (VDADecoderOutputCallback *)ff_vda_output_callback,
478  avctx,
479  &vda_ctx->decoder);
480 
481  CFRelease(format);
482  CFRelease(height);
483  CFRelease(width);
484  CFRelease(avc_data);
485  CFRelease(config_info);
486  CFRelease(cv_pix_fmt);
487  CFRelease(io_surface_properties);
488  CFRelease(buffer_attributes);
489 
490  if (status != kVDADecoderNoErr) {
491  av_log(avctx, AV_LOG_ERROR, "Cannot initialize VDA %d\n", status);
492  }
493 
494  switch (status) {
495  case kVDADecoderHardwareNotSupportedErr:
496  case kVDADecoderFormatNotSupportedErr:
497  return AVERROR(ENOSYS);
498  case kVDADecoderConfigurationError:
499  return AVERROR(EINVAL);
500  case kVDADecoderDecoderFailedErr:
501  return AVERROR_INVALIDDATA;
502  case kVDADecoderNoErr:
503  return 0;
504  default:
505  return AVERROR_UNKNOWN;
506  }
507 }
508 
509 static int vda_h264_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
510 {
511  frame->width = avctx->width;
512  frame->height = avctx->height;
513  frame->format = avctx->pix_fmt;
514  frame->buf[0] = av_buffer_alloc(1);
515 
516  if (!frame->buf[0])
517  return AVERROR(ENOMEM);
518  return 0;
519 }
520 
521 AVHWAccel ff_h264_vda_hwaccel = {
522  .name = "h264_vda",
523  .type = AVMEDIA_TYPE_VIDEO,
524  .id = AV_CODEC_ID_H264,
525  .pix_fmt = AV_PIX_FMT_VDA,
526  .alloc_frame = vda_h264_alloc_frame,
527  .start_frame = vda_h264_start_frame,
528  .decode_slice = vda_h264_decode_slice,
529  .end_frame = vda_h264_end_frame,
530  .uninit = vda_h264_uninit,
531  .priv_data_size = sizeof(VDAContext),
532 };
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