FFmpeg
mmaldec.c
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1 /*
2  * MMAL Video Decoder
3  * Copyright (c) 2015 rcombs
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * MMAL Video Decoder
25  */
26 
27 #include <bcm_host.h>
28 #include <interface/mmal/mmal.h>
29 #include <interface/mmal/mmal_parameters_video.h>
30 #include <interface/mmal/util/mmal_util.h>
31 #include <interface/mmal/util/mmal_util_params.h>
32 #include <interface/mmal/util/mmal_default_components.h>
33 #include <interface/mmal/vc/mmal_vc_api.h>
34 #include <stdatomic.h>
35 
36 #include "avcodec.h"
37 #include "decode.h"
38 #include "hwconfig.h"
39 #include "internal.h"
40 #include "libavutil/avassert.h"
41 #include "libavutil/buffer.h"
42 #include "libavutil/common.h"
43 #include "libavutil/imgutils.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/log.h"
46 
47 typedef struct FFBufferEntry {
49  void *data;
50  size_t length;
51  int64_t pts, dts;
52  int flags;
55 
56 // MMAL_POOL_T destroys all of its MMAL_BUFFER_HEADER_Ts. If we want correct
57 // refcounting for AVFrames, we can free the MMAL_POOL_T only after all AVFrames
58 // have been unreferenced.
59 typedef struct FFPoolRef {
61  MMAL_POOL_T *pool;
62 } FFPoolRef;
63 
64 typedef struct FFBufferRef {
65  MMAL_BUFFER_HEADER_T *buffer;
67 } FFBufferRef;
68 
69 typedef struct MMALDecodeContext {
73 
74  MMAL_COMPONENT_T *decoder;
75  MMAL_QUEUE_T *queue_decoded_frames;
76  MMAL_POOL_T *pool_in;
78 
79  // Waiting input packets. Because the libavcodec API requires decoding and
80  // returning packets in lockstep, it can happen that queue_decoded_frames
81  // contains almost all surfaces - then the decoder input queue can quickly
82  // fill up and won't accept new input either. Without consuming input, the
83  // libavcodec API can't return new frames, and we have a logical deadlock.
84  // This is avoided by queuing such buffers here.
86 
87  int64_t packets_sent;
89  int64_t frames_output;
91  int eos_sent;
96 
97 // Assume decoder is guaranteed to produce output after at least this many
98 // packets (where each packet contains 1 frame).
99 #define MAX_DELAYED_FRAMES 16
100 
102 {
103  if (ref &&
104  atomic_fetch_add_explicit(&ref->refcount, -1, memory_order_acq_rel) == 1) {
105  mmal_pool_destroy(ref->pool);
106  av_free(ref);
107  }
108 }
109 
110 static void ffmmal_release_frame(void *opaque, uint8_t *data)
111 {
112  FFBufferRef *ref = (void *)data;
113 
114  mmal_buffer_header_release(ref->buffer);
115  ffmmal_poolref_unref(ref->pool);
116 
117  av_free(ref);
118 }
119 
120 // Setup frame with a new reference to buffer. The buffer must have been
121 // allocated from the given pool.
123  MMAL_BUFFER_HEADER_T *buffer)
124 {
125  FFBufferRef *ref = av_mallocz(sizeof(*ref));
126  if (!ref)
127  return AVERROR(ENOMEM);
128 
129  ref->pool = pool;
130  ref->buffer = buffer;
131 
132  frame->buf[0] = av_buffer_create((void *)ref, sizeof(*ref),
135  if (!frame->buf[0]) {
136  av_free(ref);
137  return AVERROR(ENOMEM);
138  }
139 
140  atomic_fetch_add_explicit(&ref->pool->refcount, 1, memory_order_relaxed);
141  mmal_buffer_header_acquire(buffer);
142 
143  frame->format = AV_PIX_FMT_MMAL;
144  frame->data[3] = (uint8_t *)ref->buffer;
145  return 0;
146 }
147 
149 {
150  MMALDecodeContext *ctx = avctx->priv_data;
151  MMAL_COMPONENT_T *decoder = ctx->decoder;
152  MMAL_BUFFER_HEADER_T *buffer;
153 
154  mmal_port_disable(decoder->input[0]);
155  mmal_port_disable(decoder->output[0]);
156  mmal_port_disable(decoder->control);
157 
158  mmal_port_flush(decoder->input[0]);
159  mmal_port_flush(decoder->output[0]);
160  mmal_port_flush(decoder->control);
161 
162  while ((buffer = mmal_queue_get(ctx->queue_decoded_frames)))
163  mmal_buffer_header_release(buffer);
164 
165  while (ctx->waiting_buffers) {
166  FFBufferEntry *buffer = ctx->waiting_buffers;
167 
168  ctx->waiting_buffers = buffer->next;
169 
170  if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
171  atomic_fetch_add(&ctx->packets_buffered, -1);
172 
173  av_buffer_unref(&buffer->ref);
174  av_free(buffer);
175  }
176  ctx->waiting_buffers_tail = NULL;
177 
178  av_assert0(atomic_load(&ctx->packets_buffered) == 0);
179 
180  ctx->frames_output = ctx->eos_received = ctx->eos_sent = ctx->packets_sent = ctx->extradata_sent = 0;
181 }
182 
184 {
185  MMALDecodeContext *ctx = avctx->priv_data;
186 
187  if (ctx->decoder)
188  ffmmal_stop_decoder(avctx);
189 
190  mmal_component_destroy(ctx->decoder);
191  ctx->decoder = NULL;
192  mmal_queue_destroy(ctx->queue_decoded_frames);
193  mmal_pool_destroy(ctx->pool_in);
194  ffmmal_poolref_unref(ctx->pool_out);
195 
196  mmal_vc_deinit();
197 
198  return 0;
199 }
200 
201 static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
202 {
203  AVCodecContext *avctx = (AVCodecContext*)port->userdata;
204  MMALDecodeContext *ctx = avctx->priv_data;
205 
206  if (!buffer->cmd) {
207  FFBufferEntry *entry = buffer->user_data;
208  av_buffer_unref(&entry->ref);
209  if (entry->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
210  atomic_fetch_add(&ctx->packets_buffered, -1);
211  av_free(entry);
212  }
213  mmal_buffer_header_release(buffer);
214 }
215 
216 static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
217 {
218  AVCodecContext *avctx = (AVCodecContext*)port->userdata;
219  MMALDecodeContext *ctx = avctx->priv_data;
220 
221  mmal_queue_put(ctx->queue_decoded_frames, buffer);
222 }
223 
224 static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
225 {
226  AVCodecContext *avctx = (AVCodecContext*)port->userdata;
227  MMAL_STATUS_T status;
228 
229  if (buffer->cmd == MMAL_EVENT_ERROR) {
230  status = *(uint32_t *)buffer->data;
231  av_log(avctx, AV_LOG_ERROR, "MMAL error %d on control port\n", (int)status);
232  } else {
233  av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on control port\n",
234  av_fourcc2str(buffer->cmd));
235  }
236 
237  mmal_buffer_header_release(buffer);
238 }
239 
240 // Feed free output buffers to the decoder.
242 {
243  MMALDecodeContext *ctx = avctx->priv_data;
244  MMAL_BUFFER_HEADER_T *buffer;
245  MMAL_STATUS_T status;
246 
247  if (!ctx->pool_out)
248  return AVERROR_UNKNOWN; // format change code failed with OOM previously
249 
250  while ((buffer = mmal_queue_get(ctx->pool_out->pool->queue))) {
251  if ((status = mmal_port_send_buffer(ctx->decoder->output[0], buffer))) {
252  mmal_buffer_header_release(buffer);
253  av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending output buffer.\n", (int)status);
254  return AVERROR_UNKNOWN;
255  }
256  }
257 
258  return 0;
259 }
260 
261 static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
262 {
263  switch (fourcc) {
264  case MMAL_COLOR_SPACE_BT470_2_BG:
265  case MMAL_COLOR_SPACE_BT470_2_M:
266  case MMAL_COLOR_SPACE_ITUR_BT601: return AVCOL_SPC_BT470BG;
267  case MMAL_COLOR_SPACE_ITUR_BT709: return AVCOL_SPC_BT709;
268  case MMAL_COLOR_SPACE_FCC: return AVCOL_SPC_FCC;
269  case MMAL_COLOR_SPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M;
270  default: return AVCOL_SPC_UNSPECIFIED;
271  }
272 }
273 
275 {
276  MMALDecodeContext *ctx = avctx->priv_data;
277  MMAL_STATUS_T status;
278  int ret = 0;
279  MMAL_COMPONENT_T *decoder = ctx->decoder;
280  MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
281  MMAL_PARAMETER_VIDEO_INTERLACE_TYPE_T interlace_type;
282 
283  ffmmal_poolref_unref(ctx->pool_out);
284  if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
285  ret = AVERROR(ENOMEM);
286  goto fail;
287  }
288  atomic_init(&ctx->pool_out->refcount, 1);
289 
290  if (!format_out)
291  goto fail;
292 
293  if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
294  goto fail;
295 
296  if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
297  goto fail;
298 
299  if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
300  format_out->encoding = MMAL_ENCODING_OPAQUE;
301  } else {
302  format_out->encoding_variant = format_out->encoding = MMAL_ENCODING_I420;
303  }
304 
305  if ((status = mmal_port_format_commit(decoder->output[0])))
306  goto fail;
307 
308  interlace_type.hdr.id = MMAL_PARAMETER_VIDEO_INTERLACE_TYPE;
309  interlace_type.hdr.size = sizeof(MMAL_PARAMETER_VIDEO_INTERLACE_TYPE_T);
310  status = mmal_port_parameter_get(decoder->output[0], &interlace_type.hdr);
311  if (status != MMAL_SUCCESS) {
312  av_log(avctx, AV_LOG_ERROR, "Cannot read MMAL interlace information!\n");
313  } else {
314  ctx->interlaced_frame = (interlace_type.eMode != MMAL_InterlaceProgressive);
315  ctx->top_field_first = (interlace_type.eMode == MMAL_InterlaceFieldsInterleavedUpperFirst);
316  }
317 
318  if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
319  format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
320  goto fail;
321 
322  if (format_out->es->video.par.num && format_out->es->video.par.den) {
323  avctx->sample_aspect_ratio.num = format_out->es->video.par.num;
324  avctx->sample_aspect_ratio.den = format_out->es->video.par.den;
325  }
326  if (format_out->es->video.frame_rate.num && format_out->es->video.frame_rate.den) {
327  avctx->framerate.num = format_out->es->video.frame_rate.num;
328  avctx->framerate.den = format_out->es->video.frame_rate.den;
329  }
330 
331  avctx->colorspace = ffmmal_csp_to_av_csp(format_out->es->video.color_space);
332 
333  decoder->output[0]->buffer_size =
334  FFMAX(decoder->output[0]->buffer_size_min, decoder->output[0]->buffer_size_recommended);
335  decoder->output[0]->buffer_num =
336  FFMAX(decoder->output[0]->buffer_num_min, decoder->output[0]->buffer_num_recommended) + ctx->extra_buffers;
337  ctx->pool_out->pool = mmal_pool_create(decoder->output[0]->buffer_num,
338  decoder->output[0]->buffer_size);
339  if (!ctx->pool_out->pool) {
340  ret = AVERROR(ENOMEM);
341  goto fail;
342  }
343 
344  return 0;
345 
346 fail:
347  return ret < 0 ? ret : AVERROR_UNKNOWN;
348 }
349 
351 {
352  MMALDecodeContext *ctx = avctx->priv_data;
353  MMAL_STATUS_T status;
354  MMAL_ES_FORMAT_T *format_in;
355  MMAL_COMPONENT_T *decoder;
356  int ret = 0;
357 
358  bcm_host_init();
359 
360  if (mmal_vc_init()) {
361  av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
362  return AVERROR(ENOSYS);
363  }
364 
365  if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
366  return ret;
367 
368  avctx->pix_fmt = ret;
369 
370  if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &ctx->decoder)))
371  goto fail;
372 
373  decoder = ctx->decoder;
374 
375  format_in = decoder->input[0]->format;
376  format_in->type = MMAL_ES_TYPE_VIDEO;
377  switch (avctx->codec_id) {
379  format_in->encoding = MMAL_ENCODING_MP2V;
380  break;
381  case AV_CODEC_ID_MPEG4:
382  format_in->encoding = MMAL_ENCODING_MP4V;
383  break;
384  case AV_CODEC_ID_VC1:
385  format_in->encoding = MMAL_ENCODING_WVC1;
386  break;
387  case AV_CODEC_ID_H264:
388  default:
389  format_in->encoding = MMAL_ENCODING_H264;
390  break;
391  }
392  format_in->es->video.width = FFALIGN(avctx->width, 32);
393  format_in->es->video.height = FFALIGN(avctx->height, 16);
394  format_in->es->video.crop.width = avctx->width;
395  format_in->es->video.crop.height = avctx->height;
396  format_in->es->video.frame_rate.num = 24000;
397  format_in->es->video.frame_rate.den = 1001;
398  format_in->es->video.par.num = avctx->sample_aspect_ratio.num;
399  format_in->es->video.par.den = avctx->sample_aspect_ratio.den;
400  format_in->flags = MMAL_ES_FORMAT_FLAG_FRAMED;
401 
402  av_log(avctx, AV_LOG_DEBUG, "Using MMAL %s encoding.\n",
403  av_fourcc2str(format_in->encoding));
404 
405 #if HAVE_MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
406  if (mmal_port_parameter_set_uint32(decoder->input[0], MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS,
407  -1 - ctx->extra_decoder_buffers)) {
408  av_log(avctx, AV_LOG_WARNING, "Could not set input buffering limit.\n");
409  }
410 #endif
411 
412  if ((status = mmal_port_format_commit(decoder->input[0])))
413  goto fail;
414 
415  decoder->input[0]->buffer_num =
416  FFMAX(decoder->input[0]->buffer_num_min, 20);
417  decoder->input[0]->buffer_size =
418  FFMAX(decoder->input[0]->buffer_size_min, 512 * 1024);
419  ctx->pool_in = mmal_pool_create(decoder->input[0]->buffer_num, 0);
420  if (!ctx->pool_in) {
421  ret = AVERROR(ENOMEM);
422  goto fail;
423  }
424 
425  if ((ret = ffmal_update_format(avctx)) < 0)
426  goto fail;
427 
428  ctx->queue_decoded_frames = mmal_queue_create();
429  if (!ctx->queue_decoded_frames)
430  goto fail;
431 
432  decoder->input[0]->userdata = (void*)avctx;
433  decoder->output[0]->userdata = (void*)avctx;
434  decoder->control->userdata = (void*)avctx;
435 
436  if ((status = mmal_port_enable(decoder->control, control_port_cb)))
437  goto fail;
438  if ((status = mmal_port_enable(decoder->input[0], input_callback)))
439  goto fail;
440  if ((status = mmal_port_enable(decoder->output[0], output_callback)))
441  goto fail;
442 
443  if ((status = mmal_component_enable(decoder)))
444  goto fail;
445 
446  return 0;
447 
448 fail:
449  ffmmal_close_decoder(avctx);
450  return ret < 0 ? ret : AVERROR_UNKNOWN;
451 }
452 
453 static void ffmmal_flush(AVCodecContext *avctx)
454 {
455  MMALDecodeContext *ctx = avctx->priv_data;
456  MMAL_COMPONENT_T *decoder = ctx->decoder;
457  MMAL_STATUS_T status;
458 
459  ffmmal_stop_decoder(avctx);
460 
461  if ((status = mmal_port_enable(decoder->control, control_port_cb)))
462  goto fail;
463  if ((status = mmal_port_enable(decoder->input[0], input_callback)))
464  goto fail;
465  if ((status = mmal_port_enable(decoder->output[0], output_callback)))
466  goto fail;
467 
468  return;
469 
470 fail:
471  av_log(avctx, AV_LOG_ERROR, "MMAL flush error: %i\n", (int)status);
472 }
473 
474 // Split packets and add them to the waiting_buffers list. We don't queue them
475 // immediately, because it can happen that the decoder is temporarily blocked
476 // (due to us not reading/returning enough output buffers) and won't accept
477 // new input. (This wouldn't be an issue if MMAL input buffers always were
478 // complete frames - then the input buffer just would have to be big enough.)
479 // If is_extradata is set, send it as MMAL_BUFFER_HEADER_FLAG_CONFIG.
480 static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt,
481  int is_extradata)
482 {
483  MMALDecodeContext *ctx = avctx->priv_data;
484  AVBufferRef *buf = NULL;
485  int size = 0;
486  uint8_t *data = (uint8_t *)"";
487  uint8_t *start;
488  int ret = 0;
489 
490  if (avpkt->size) {
491  if (avpkt->buf) {
492  buf = av_buffer_ref(avpkt->buf);
493  size = avpkt->size;
494  data = avpkt->data;
495  } else {
496  buf = av_buffer_alloc(avpkt->size);
497  if (buf) {
498  memcpy(buf->data, avpkt->data, avpkt->size);
499  size = buf->size;
500  data = buf->data;
501  }
502  }
503  if (!buf) {
504  ret = AVERROR(ENOMEM);
505  goto done;
506  }
507  if (!is_extradata)
508  ctx->packets_sent++;
509  } else {
510  if (ctx->eos_sent)
511  goto done;
512  if (!ctx->packets_sent) {
513  // Short-cut the flush logic to avoid upsetting MMAL.
514  ctx->eos_sent = 1;
515  ctx->eos_received = 1;
516  goto done;
517  }
518  }
519 
520  start = data;
521 
522  do {
523  FFBufferEntry *buffer = av_mallocz(sizeof(*buffer));
524  if (!buffer) {
525  ret = AVERROR(ENOMEM);
526  goto done;
527  }
528 
529  buffer->data = data;
530  buffer->length = FFMIN(size, ctx->decoder->input[0]->buffer_size);
531 
532  if (is_extradata)
533  buffer->flags |= MMAL_BUFFER_HEADER_FLAG_CONFIG;
534 
535  if (data == start)
536  buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_START;
537 
538  data += buffer->length;
539  size -= buffer->length;
540 
541  buffer->pts = avpkt->pts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->pts;
542  buffer->dts = avpkt->dts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->dts;
543 
544  if (!size) {
545  buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
546  atomic_fetch_add(&ctx->packets_buffered, 1);
547  }
548 
549  if (!buffer->length) {
550  buffer->flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
551  ctx->eos_sent = 1;
552  }
553 
554  if (buf) {
555  buffer->ref = av_buffer_ref(buf);
556  if (!buffer->ref) {
557  av_free(buffer);
558  ret = AVERROR(ENOMEM);
559  goto done;
560  }
561  }
562 
563  // Insert at end of the list
564  if (!ctx->waiting_buffers)
565  ctx->waiting_buffers = buffer;
566  if (ctx->waiting_buffers_tail)
567  ctx->waiting_buffers_tail->next = buffer;
568  ctx->waiting_buffers_tail = buffer;
569  } while (size);
570 
571 done:
572  av_buffer_unref(&buf);
573  return ret;
574 }
575 
576 // Move prepared/split packets from waiting_buffers to the MMAL decoder.
578 {
579  MMALDecodeContext *ctx = avctx->priv_data;
580 
581  while (ctx->waiting_buffers) {
582  MMAL_BUFFER_HEADER_T *mbuffer;
584  MMAL_STATUS_T status;
585 
586  mbuffer = mmal_queue_get(ctx->pool_in->queue);
587  if (!mbuffer)
588  return 0;
589 
590  buffer = ctx->waiting_buffers;
591 
592  mmal_buffer_header_reset(mbuffer);
593  mbuffer->cmd = 0;
594  mbuffer->pts = buffer->pts;
595  mbuffer->dts = buffer->dts;
596  mbuffer->flags = buffer->flags;
597  mbuffer->data = buffer->data;
598  mbuffer->length = buffer->length;
599  mbuffer->user_data = buffer;
600  mbuffer->alloc_size = ctx->decoder->input[0]->buffer_size;
601 
602  // Remove from start of the list
603  ctx->waiting_buffers = buffer->next;
604  if (ctx->waiting_buffers_tail == buffer)
605  ctx->waiting_buffers_tail = NULL;
606 
607  if ((status = mmal_port_send_buffer(ctx->decoder->input[0], mbuffer))) {
608  mmal_buffer_header_release(mbuffer);
609  av_buffer_unref(&buffer->ref);
610  if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
611  atomic_fetch_add(&ctx->packets_buffered, -1);
612  av_free(buffer);
613  }
614 
615  if (status) {
616  av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending input\n", (int)status);
617  return AVERROR_UNKNOWN;
618  }
619  }
620 
621  return 0;
622 }
623 
625  MMAL_BUFFER_HEADER_T *buffer)
626 {
627  MMALDecodeContext *ctx = avctx->priv_data;
628  int ret = 0;
629 
630  frame->interlaced_frame = ctx->interlaced_frame;
631  frame->top_field_first = ctx->top_field_first;
632 
633  if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
634  if (!ctx->pool_out)
635  return AVERROR_UNKNOWN; // format change code failed with OOM previously
636 
637  if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
638  goto done;
639 
640  if ((ret = ffmmal_set_ref(frame, ctx->pool_out, buffer)) < 0)
641  goto done;
642  } else {
643  int w = FFALIGN(avctx->width, 32);
644  int h = FFALIGN(avctx->height, 16);
645  uint8_t *src[4];
646  int linesize[4];
647 
648  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
649  goto done;
650 
651  av_image_fill_arrays(src, linesize,
652  buffer->data + buffer->type->video.offset[0],
653  avctx->pix_fmt, w, h, 1);
654  av_image_copy(frame->data, frame->linesize, src, linesize,
655  avctx->pix_fmt, avctx->width, avctx->height);
656  }
657 
658  frame->pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
659  frame->pkt_dts = AV_NOPTS_VALUE;
660 
661 done:
662  return ret;
663 }
664 
665 // Fetch a decoded buffer and place it into the frame parameter.
666 static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
667 {
668  MMALDecodeContext *ctx = avctx->priv_data;
669  MMAL_BUFFER_HEADER_T *buffer = NULL;
670  MMAL_STATUS_T status = 0;
671  int ret = 0;
672 
673  if (ctx->eos_received)
674  goto done;
675 
676  while (1) {
677  // To ensure decoding in lockstep with a constant delay between fed packets
678  // and output frames, we always wait until an output buffer is available.
679  // Except during start we don't know after how many input packets the decoder
680  // is going to return the first buffer, and we can't distinguish decoder
681  // being busy from decoder waiting for input. So just poll at the start and
682  // keep feeding new data to the buffer.
683  // We are pretty sure the decoder will produce output if we sent more input
684  // frames than what a H.264 decoder could logically delay. This avoids too
685  // excessive buffering.
686  // We also wait if we sent eos, but didn't receive it yet (think of decoding
687  // stream with a very low number of frames).
688  if (atomic_load(&ctx->packets_buffered) > MAX_DELAYED_FRAMES ||
689  (ctx->packets_sent && ctx->eos_sent)) {
690  // MMAL will ignore broken input packets, which means the frame we
691  // expect here may never arrive. Dealing with this correctly is
692  // complicated, so here's a hack to avoid that it freezes forever
693  // in this unlikely situation.
694  buffer = mmal_queue_timedwait(ctx->queue_decoded_frames, 100);
695  if (!buffer) {
696  av_log(avctx, AV_LOG_ERROR, "Did not get output frame from MMAL.\n");
698  goto done;
699  }
700  } else {
701  buffer = mmal_queue_get(ctx->queue_decoded_frames);
702  if (!buffer)
703  goto done;
704  }
705 
706  ctx->eos_received |= !!(buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS);
707  if (ctx->eos_received)
708  goto done;
709 
710  if (buffer->cmd == MMAL_EVENT_FORMAT_CHANGED) {
711  MMAL_COMPONENT_T *decoder = ctx->decoder;
712  MMAL_EVENT_FORMAT_CHANGED_T *ev = mmal_event_format_changed_get(buffer);
713  MMAL_BUFFER_HEADER_T *stale_buffer;
714 
715  av_log(avctx, AV_LOG_INFO, "Changing output format.\n");
716 
717  if ((status = mmal_port_disable(decoder->output[0])))
718  goto done;
719 
720  while ((stale_buffer = mmal_queue_get(ctx->queue_decoded_frames)))
721  mmal_buffer_header_release(stale_buffer);
722 
723  mmal_format_copy(decoder->output[0]->format, ev->format);
724 
725  if ((ret = ffmal_update_format(avctx)) < 0)
726  goto done;
727 
728  if ((status = mmal_port_enable(decoder->output[0], output_callback)))
729  goto done;
730 
731  if ((ret = ffmmal_fill_output_port(avctx)) < 0)
732  goto done;
733 
734  if ((ret = ffmmal_fill_input_port(avctx)) < 0)
735  goto done;
736 
737  mmal_buffer_header_release(buffer);
738  continue;
739  } else if (buffer->cmd) {
740  av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on output port\n",
741  av_fourcc2str(buffer->cmd));
742  goto done;
743  } else if (buffer->length == 0) {
744  // Unused output buffer that got drained after format change.
745  mmal_buffer_header_release(buffer);
746  continue;
747  }
748 
749  ctx->frames_output++;
750 
751  if ((ret = ffmal_copy_frame(avctx, frame, buffer)) < 0)
752  goto done;
753 
754  *got_frame = 1;
755  break;
756  }
757 
758 done:
759  if (buffer)
760  mmal_buffer_header_release(buffer);
761  if (status && ret >= 0)
763  return ret;
764 }
765 
766 static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame,
767  AVPacket *avpkt)
768 {
769  MMALDecodeContext *ctx = avctx->priv_data;
770  AVFrame *frame = data;
771  int ret = 0;
772 
773  if (avctx->extradata_size && !ctx->extradata_sent) {
774  AVPacket pkt = {0};
776  pkt.data = avctx->extradata;
777  pkt.size = avctx->extradata_size;
778  ctx->extradata_sent = 1;
779  if ((ret = ffmmal_add_packet(avctx, &pkt, 1)) < 0)
780  return ret;
781  }
782 
783  if ((ret = ffmmal_add_packet(avctx, avpkt, 0)) < 0)
784  return ret;
785 
786  if ((ret = ffmmal_fill_input_port(avctx)) < 0)
787  return ret;
788 
789  if ((ret = ffmmal_fill_output_port(avctx)) < 0)
790  return ret;
791 
792  if ((ret = ffmmal_read_frame(avctx, frame, got_frame)) < 0)
793  return ret;
794 
795  // ffmmal_read_frame() can block for a while. Since the decoder is
796  // asynchronous, it's a good idea to fill the ports again.
797 
798  if ((ret = ffmmal_fill_output_port(avctx)) < 0)
799  return ret;
800 
801  if ((ret = ffmmal_fill_input_port(avctx)) < 0)
802  return ret;
803 
804  return ret;
805 }
806 
807 static const AVCodecHWConfigInternal *const mmal_hw_configs[] = {
808  HW_CONFIG_INTERNAL(MMAL),
809  NULL
810 };
811 
812 static const AVOption options[]={
813  {"extra_buffers", "extra buffers", offsetof(MMALDecodeContext, extra_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
814  {"extra_decoder_buffers", "extra MMAL internal buffered frames", offsetof(MMALDecodeContext, extra_decoder_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
815  {NULL}
816 };
817 
818 #define FFMMAL_DEC_CLASS(NAME) \
819  static const AVClass ffmmal_##NAME##_dec_class = { \
820  .class_name = "mmal_" #NAME "_dec", \
821  .item_name = av_default_item_name, \
822  .option = options, \
823  .version = LIBAVUTIL_VERSION_INT, \
824  };
825 
826 #define FFMMAL_DEC(NAME, ID) \
827  FFMMAL_DEC_CLASS(NAME) \
828  const AVCodec ff_##NAME##_mmal_decoder = { \
829  .name = #NAME "_mmal", \
830  .long_name = NULL_IF_CONFIG_SMALL(#NAME " (mmal)"), \
831  .type = AVMEDIA_TYPE_VIDEO, \
832  .id = ID, \
833  .priv_data_size = sizeof(MMALDecodeContext), \
834  .init = ffmmal_init_decoder, \
835  .close = ffmmal_close_decoder, \
836  .decode = ffmmal_decode, \
837  .flush = ffmmal_flush, \
838  .priv_class = &ffmmal_##NAME##_dec_class, \
839  .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE, \
840  .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS, \
841  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MMAL, \
842  AV_PIX_FMT_YUV420P, \
843  AV_PIX_FMT_NONE}, \
844  .hw_configs = mmal_hw_configs, \
845  .wrapper_name = "mmal", \
846  };
847 
FFMMAL_DEC
#define FFMMAL_DEC(NAME, ID)
Definition: mmaldec.c:826
hwconfig.h
ffmmal_fill_input_port
static int ffmmal_fill_input_port(AVCodecContext *avctx)
Definition: mmaldec.c:577
ffmmal_decode
static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: mmaldec.c:766
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
status
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
MMALDecodeContext::top_field_first
int top_field_first
Definition: mmaldec.c:94
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
MMALDecodeContext::extra_decoder_buffers
int extra_decoder_buffers
Definition: mmaldec.c:72
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:956
ff_get_format
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Select the (possibly hardware accelerated) pixel format.
Definition: decode.c:1083
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
MMALDecodeContext::frames_output
int64_t frames_output
Definition: mmaldec.c:89
AV_PIX_FMT_MMAL
@ AV_PIX_FMT_MMAL
HW acceleration though MMAL, data[3] contains a pointer to the MMAL_BUFFER_HEADER_T structure.
Definition: pixfmt.h:217
FFBufferRef::buffer
MMAL_BUFFER_HEADER_T * buffer
Definition: mmaldec.c:65
AVCodec::pix_fmts
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: codec.h:218
AV_CODEC_ID_MPEG4
@ AV_CODEC_ID_MPEG4
Definition: codec_id.h:62
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:396
w
uint8_t w
Definition: llviddspenc.c:38
MMALDecodeContext::decoder
MMAL_COMPONENT_T * decoder
Definition: mmaldec.c:74
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
MMALDecodeContext::packets_sent
int64_t packets_sent
Definition: mmaldec.c:87
AVOption
AVOption.
Definition: opt.h:247
data
const char data[16]
Definition: mxf.c:143
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:523
AVERROR_UNKNOWN
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
ffmmal_fill_output_port
static int ffmmal_fill_output_port(AVCodecContext *avctx)
Definition: mmaldec.c:241
MMALDecodeContext::av_class
AVClass * av_class
Definition: mmaldec.c:70
MMALDecodeContext::eos_sent
int eos_sent
Definition: mmaldec.c:91
FFPoolRef::pool
MMAL_POOL_T * pool
Definition: mmaldec.c:61
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
FFBufferEntry::flags
int flags
Definition: mmaldec.c:52
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:1706
AVCOL_SPC_BT470BG
@ AVCOL_SPC_BT470BG
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
Definition: pixfmt.h:508
decoder
static const chunk_decoder decoder[8]
Definition: dfa.c:330
ffmmal_poolref_unref
static void ffmmal_poolref_unref(FFPoolRef *ref)
Definition: mmaldec.c:101
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:388
fail
#define fail()
Definition: checkasm.h:136
mmal_hw_configs
static const AVCodecHWConfigInternal *const mmal_hw_configs[]
Definition: mmaldec.c:807
options
static const AVOption options[]
Definition: mmaldec.c:812
AVRational::num
int num
Numerator.
Definition: rational.h:59
av_init_packet
void av_init_packet(AVPacket *pkt)
Definition: avpacket.c:36
avassert.h
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:481
FFBufferEntry::next
struct FFBufferEntry * next
Definition: mmaldec.c:53
AV_BUFFER_FLAG_READONLY
#define AV_BUFFER_FLAG_READONLY
Always treat the buffer as read-only, even when it has only one reference.
Definition: buffer.h:114
ffmmal_flush
static void ffmmal_flush(AVCodecContext *avctx)
Definition: mmaldec.c:453
ffmmal_csp_to_av_csp
static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
Definition: mmaldec.c:261
FFBufferEntry::pts
int64_t pts
Definition: mmaldec.c:51
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ffmmal_set_ref
static int ffmmal_set_ref(AVFrame *frame, FFPoolRef *pool, MMAL_BUFFER_HEADER_T *buffer)
Definition: mmaldec.c:122
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ctx
AVFormatContext * ctx
Definition: movenc.c:48
decode.h
MMALDecodeContext::queue_decoded_frames
MMAL_QUEUE_T * queue_decoded_frames
Definition: mmaldec.c:75
atomic_load
#define atomic_load(object)
Definition: stdatomic.h:93
MAX_DELAYED_FRAMES
#define MAX_DELAYED_FRAMES
Definition: mmaldec.c:99
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:77
MMALDecodeContext::interlaced_frame
int interlaced_frame
Definition: mmaldec.c:93
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:389
control_port_cb
static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
Definition: mmaldec.c:224
if
if(ret)
Definition: filter_design.txt:179
output_callback
static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
Definition: mmaldec.c:216
ffmmal_init_decoder
static av_cold int ffmmal_init_decoder(AVCodecContext *avctx)
Definition: mmaldec.c:350
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:356
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
ffmal_copy_frame
static int ffmal_copy_frame(AVCodecContext *avctx, AVFrame *frame, MMAL_BUFFER_HEADER_T *buffer)
Definition: mmaldec.c:624
av_buffer_unref
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:125
src
#define src
Definition: vp8dsp.c:255
ffmmal_close_decoder
static av_cold int ffmmal_close_decoder(AVCodecContext *avctx)
Definition: mmaldec.c:183
ffmmal_stop_decoder
static void ffmmal_stop_decoder(AVCodecContext *avctx)
Definition: mmaldec.c:148
av_buffer_create
AVBufferRef * av_buffer_create(uint8_t *data, size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:29
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1648
AVPacket::size
int size
Definition: packet.h:374
av_image_fill_arrays
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
Setup the data pointers and linesizes based on the specified image parameters and the provided array.
Definition: imgutils.c:446
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
size
int size
Definition: twinvq_data.h:10344
atomic_fetch_add_explicit
#define atomic_fetch_add_explicit(object, operand, order)
Definition: stdatomic.h:149
FFBufferEntry::ref
AVBufferRef * ref
Definition: mmaldec.c:48
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
HW_CONFIG_INTERNAL
#define HW_CONFIG_INTERNAL(format)
Definition: hwconfig.h:57
ffmmal_read_frame
static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
Definition: mmaldec.c:666
AVCodecHWConfigInternal
Definition: hwconfig.h:29
buffer.h
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
MMALDecodeContext::waiting_buffers_tail
FFBufferEntry * waiting_buffers_tail
Definition: mmaldec.c:85
av_buffer_alloc
AVBufferRef * av_buffer_alloc(size_t size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
AVBufferRef::size
size_t size
Size of data in bytes.
Definition: buffer.h:94
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
AVCOL_SPC_SMPTE240M
@ AVCOL_SPC_SMPTE240M
derived from 170M primaries and D65 white point, 170M is derived from BT470 System M's primaries
Definition: pixfmt.h:510
log.h
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:480
MMALDecodeContext::extradata_sent
int extradata_sent
Definition: mmaldec.c:92
MMALDecodeContext::pool_out
FFPoolRef * pool_out
Definition: mmaldec.c:77
AVColorSpace
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:502
common.h
FFBufferEntry::dts
int64_t dts
Definition: mmaldec.c:51
MMALDecodeContext
Definition: mmaldec.c:69
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:120
AVCOL_SPC_UNSPECIFIED
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:505
AVCodecContext::height
int height
Definition: avcodec.h:552
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:589
avcodec.h
FFPoolRef
Definition: mmaldec.c:59
ret
ret
Definition: filter_design.txt:187
MMALDecodeContext::extra_buffers
int extra_buffers
Definition: mmaldec.c:71
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
ffmal_update_format
static int ffmal_update_format(AVCodecContext *avctx)
Definition: mmaldec.c:274
ff_decode_frame_props
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
Set various frame properties from the codec context / packet data.
Definition: decode.c:1485
AVCodecContext
main external API structure.
Definition: avcodec.h:379
FFBufferEntry::data
void * data
Definition: mmaldec.c:49
av_image_copy
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:422
input_callback
static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
Definition: mmaldec.c:201
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
MMALDecodeContext::waiting_buffers
FFBufferEntry * waiting_buffers
Definition: mmaldec.c:85
AVRational::den
int den
Denominator.
Definition: rational.h:60
atomic_fetch_add
#define atomic_fetch_add(object, operand)
Definition: stdatomic.h:131
AVCOL_SPC_FCC
@ AVCOL_SPC_FCC
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:507
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
FFBufferEntry
Definition: mmaldec.c:47
av_buffer_ref
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:86
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
MMALDecodeContext::packets_buffered
atomic_int packets_buffered
Definition: mmaldec.c:88
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:406
ffmmal_release_frame
static void ffmmal_release_frame(void *opaque, uint8_t *data)
Definition: mmaldec.c:110
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:552
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
FFPoolRef::refcount
atomic_int refcount
Definition: mmaldec.c:60
h
h
Definition: vp9dsp_template.c:2038
ffmmal_add_packet
static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt, int is_extradata)
Definition: mmaldec.c:480
atomic_init
#define atomic_init(obj, value)
Definition: stdatomic.h:33
FFBufferRef::pool
FFPoolRef * pool
Definition: mmaldec.c:66
MMALDecodeContext::eos_received
int eos_received
Definition: mmaldec.c:90
AVCOL_SPC_BT709
@ AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / derived in SMPTE RP 177 Annex B
Definition: pixfmt.h:504
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:52
FFBufferRef
Definition: mmaldec.c:64
fourcc
uint32_t fourcc
Definition: vaapi_decode.c:239
FFBufferEntry::length
size_t length
Definition: mmaldec.c:50
AVCodecContext::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
Definition: avcodec.h:749
MMALDecodeContext::pool_in
MMAL_POOL_T * pool_in
Definition: mmaldec.c:76
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:348