FFmpeg
h264_mp4toannexb_bsf.c
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1 /*
2  * H.264 MP4 to Annex B byte stream format filter
3  * Copyright (c) 2007 Benoit Fouet <benoit.fouet@free.fr>
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 #include <string.h>
23 
24 #include "libavutil/avassert.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/mem.h"
27 
28 #include "bsf.h"
29 #include "bsf_internal.h"
30 #include "bytestream.h"
31 #include "defs.h"
32 #include "h264.h"
33 
34 typedef struct H264BSFContext {
35  uint8_t *sps;
36  uint8_t *pps;
37  int sps_size;
38  int pps_size;
39  unsigned sps_buf_size;
40  unsigned pps_buf_size;
41  uint8_t length_size;
42  uint8_t new_idr;
43  uint8_t idr_sps_seen;
44  uint8_t idr_pps_seen;
47 
48 enum PsSource {
50  PS_NONE = 0,
52 };
53 
54 static void count_or_copy(uint8_t **out, uint64_t *out_size,
55  const uint8_t *in, int in_size, enum PsSource ps, int copy)
56 {
57  uint8_t start_code_size;
58 
59  if (ps == PS_OUT_OF_BAND)
60  /* start code already present in out-of-band ps data, so don't need to
61  * add it manually again
62  */
63  start_code_size = 0;
64  else if (ps == PS_IN_BAND || *out_size == 0)
65  start_code_size = 4;
66  else
67  start_code_size = 3;
68 
69  if (copy) {
70  memcpy(*out + start_code_size, in, in_size);
71  if (start_code_size == 4) {
72  AV_WB32(*out, 1);
73  } else if (start_code_size) {
74  (*out)[0] =
75  (*out)[1] = 0;
76  (*out)[2] = 1;
77  }
78  *out += start_code_size + in_size;
79  }
80  *out_size += start_code_size + in_size;
81 }
82 
84  uint8_t *extradata, int extradata_size)
85 {
87  GetByteContext ogb, *gb = &ogb;
88  uint16_t unit_size;
89  uint32_t total_size = 0;
90  uint8_t *out = NULL, unit_nb, sps_done = 0;
91  static const uint8_t nalu_header[4] = { 0, 0, 0, 1 };
92  const int padding = AV_INPUT_BUFFER_PADDING_SIZE;
93  int length_size, pps_offset = 0;
94 
95  bytestream2_init(gb, extradata, extradata_size);
96 
97  bytestream2_skipu(gb, 4);
98 
99  /* retrieve length coded size */
100  length_size = (bytestream2_get_byteu(gb) & 0x3) + 1;
101 
102  /* retrieve sps and pps unit(s) */
103  unit_nb = bytestream2_get_byteu(gb) & 0x1f; /* number of sps unit(s) */
104  if (!unit_nb) {
105  goto pps;
106  }
107 
108  while (unit_nb--) {
109  int err;
110 
111  /* possible overread ok due to padding */
112  unit_size = bytestream2_get_be16u(gb);
113  total_size += unit_size + 4;
114  av_assert1(total_size <= INT_MAX - padding);
115  if (bytestream2_get_bytes_left(gb) < unit_size + !sps_done) {
116  av_log(ctx, AV_LOG_ERROR, "Global extradata truncated, "
117  "corrupted stream or invalid MP4/AVCC bitstream\n");
118  av_free(out);
119  return AVERROR_INVALIDDATA;
120  }
121  if ((err = av_reallocp(&out, total_size + padding)) < 0)
122  return err;
123  memcpy(out + total_size - unit_size - 4, nalu_header, 4);
124  bytestream2_get_bufferu(gb, out + total_size - unit_size, unit_size);
125 pps:
126  if (!unit_nb && !sps_done++) {
127  unit_nb = bytestream2_get_byteu(gb); /* number of pps unit(s) */
128  pps_offset = total_size;
129  }
130  }
131 
132  if (out)
133  memset(out + total_size, 0, padding);
134 
135  if (pps_offset) {
136  uint8_t *sps;
137 
138  s->sps_size = pps_offset;
139  sps = av_fast_realloc(s->sps, &s->sps_buf_size, s->sps_size);
140  if (!sps) {
141  av_free(out);
142  return AVERROR(ENOMEM);
143  }
144  s->sps = sps;
145  memcpy(s->sps, out, s->sps_size);
146  } else {
148  "Warning: SPS NALU missing or invalid. "
149  "The resulting stream may not play.\n");
150  }
151  if (pps_offset < total_size) {
152  uint8_t *pps;
153 
154  s->pps_size = total_size - pps_offset;
155  pps = av_fast_realloc(s->pps, &s->pps_buf_size, s->pps_size);
156  if (!pps) {
157  av_freep(&s->sps);
158  av_free(out);
159  return AVERROR(ENOMEM);
160  }
161  s->pps = pps;
162  memcpy(s->pps, out + pps_offset, s->pps_size);
163  } else {
165  "Warning: PPS NALU missing or invalid. "
166  "The resulting stream may not play.\n");
167  }
168 
169  av_freep(&ctx->par_out->extradata);
170  ctx->par_out->extradata = out;
171  ctx->par_out->extradata_size = total_size;
172 
173  s->length_size = length_size;
174  s->new_idr = 1;
175  s->idr_sps_seen = 0;
176  s->idr_pps_seen = 0;
177  s->extradata_parsed = 1;
178 
179  return 0;
180 }
181 
182 static int h264_mp4toannexb_save_ps(uint8_t **dst, int *dst_size,
183  unsigned *dst_buf_size,
184  const uint8_t *nal, uint32_t nal_size,
185  int first)
186 {
187  static const uint8_t nalu_header[4] = { 0, 0, 0, 1 };
188  const int start_code_size = sizeof(nalu_header);
189  uint8_t *ptr;
190  uint32_t size;
191 
192  if (first)
193  size = 0;
194  else
195  size = *dst_size;
196 
197  ptr = av_fast_realloc(*dst, dst_buf_size, size + nal_size + start_code_size);
198  if (!ptr)
199  return AVERROR(ENOMEM);
200 
201  memcpy(ptr + size, nalu_header, start_code_size);
202  size += start_code_size;
203  memcpy(ptr + size, nal, nal_size);
204  size += nal_size;
205 
206  *dst = ptr;
207  *dst_size = size;
208  return 0;
209 }
210 
212 {
213  int extra_size = ctx->par_in->extradata_size;
214 
215  /* retrieve sps and pps NAL units from extradata */
216  if (!extra_size ||
217  (extra_size >= 3 && AV_RB24(ctx->par_in->extradata) == 1) ||
218  (extra_size >= 4 && AV_RB32(ctx->par_in->extradata) == 1)) {
220  "The input looks like it is Annex B already\n");
221  } else if (extra_size >= 7) {
223  ctx->par_in->extradata,
224  ctx->par_in->extradata_size);
225  } else {
226  av_log(ctx, AV_LOG_ERROR, "Invalid extradata size: %d\n", extra_size);
227  return AVERROR_INVALIDDATA;
228  }
229 
230  return 0;
231 }
232 
234 {
236  AVPacket *in;
237  uint8_t unit_type, new_idr, sps_seen, pps_seen;
238  const uint8_t *buf;
239  const uint8_t *buf_end;
240  uint8_t *out;
241  uint64_t out_size;
242  int ret;
243  size_t extradata_size;
244  uint8_t *extradata;
245 
246  ret = ff_bsf_get_packet(ctx, &in);
247  if (ret < 0)
248  return ret;
249 
251  &extradata_size);
252  if (extradata) {
253  ret = h264_extradata_to_annexb(ctx, extradata, extradata_size);
254  if (ret < 0)
255  goto fail;
256  }
257 
258  /* nothing to filter */
259  if (!s->extradata_parsed) {
260  av_packet_move_ref(opkt, in);
261  av_packet_free(&in);
262  return 0;
263  }
264 
265  buf_end = in->data + in->size;
266 
267 #define LOG_ONCE(...) \
268  if (j) \
269  av_log(__VA_ARGS__)
270  for (int j = 0; j < 2; j++) {
271  int sps_count = 0;
272  int pps_count = 0;
273 
274  buf = in->data;
275  new_idr = s->new_idr;
276  sps_seen = s->idr_sps_seen;
277  pps_seen = s->idr_pps_seen;
278  out_size = 0;
279 
280  do {
281  uint32_t nal_size = 0;
282  enum PsSource ps;
283 
284  /* possible overread ok due to padding */
285  for (int i = 0; i < s->length_size; i++)
286  nal_size = (nal_size << 8) | buf[i];
287 
288  buf += s->length_size;
289 
290  /* This check requires the cast as the right side might
291  * otherwise be promoted to an unsigned value. */
292  if ((int64_t)nal_size > buf_end - buf) {
294  goto fail;
295  }
296 
297  if (!nal_size)
298  continue;
299 
300  unit_type = *buf & 0x1f;
301 
302  if (unit_type == H264_NAL_SPS) {
303  sps_seen = new_idr = 1;
304  if (!j) {
305  h264_mp4toannexb_save_ps(&s->sps, &s->sps_size, &s->sps_buf_size,
306  buf, nal_size, !sps_count);
307  sps_count++;
308  }
309  } else if (unit_type == H264_NAL_PPS) {
310  pps_seen = new_idr = 1;
311  if (!j) {
312  h264_mp4toannexb_save_ps(&s->pps, &s->pps_size, &s->pps_buf_size,
313  buf, nal_size, !pps_count);
314  pps_count++;
315  }
316  /* if SPS has not been seen yet, prepend the AVCC one to PPS */
317  if (!sps_seen) {
318  if (!s->sps_size) {
319  LOG_ONCE(ctx, AV_LOG_WARNING, "SPS not present in the stream, nor in AVCC, stream may be unreadable\n");
320  } else {
321  count_or_copy(&out, &out_size, s->sps, s->sps_size, PS_OUT_OF_BAND, j);
322  sps_seen = 1;
323  }
324  }
325  }
326 
327  /* If this is a new IDR picture following an IDR picture, reset the idr flag.
328  * Just check first_mb_in_slice to be 0 as this is the simplest solution.
329  * This could be checking idr_pic_id instead, but would complexify the parsing. */
330  if (!new_idr && unit_type == H264_NAL_IDR_SLICE && (buf[1] & 0x80))
331  new_idr = 1;
332 
333  /* prepend only to the first type 5 NAL unit of an IDR picture, if no sps/pps are already present */
334  if (new_idr && unit_type == H264_NAL_IDR_SLICE && !sps_seen && !pps_seen) {
335  if (s->sps_size)
336  count_or_copy(&out, &out_size, s->sps, s->sps_size, PS_OUT_OF_BAND, j);
337  if (s->pps_size)
338  count_or_copy(&out, &out_size, s->pps, s->pps_size, PS_OUT_OF_BAND, j);
339  new_idr = 0;
340  /* if only SPS has been seen, also insert PPS */
341  } else if (new_idr && unit_type == H264_NAL_IDR_SLICE && sps_seen && !pps_seen) {
342  if (!s->pps_size) {
343  LOG_ONCE(ctx, AV_LOG_WARNING, "PPS not present in the stream, nor in AVCC, stream may be unreadable\n");
344  } else {
345  count_or_copy(&out, &out_size, s->pps, s->pps_size, PS_OUT_OF_BAND, j);
346  }
347  }
348 
349  if (unit_type == H264_NAL_SPS || unit_type == H264_NAL_PPS)
350  ps = PS_IN_BAND;
351  else
352  ps = PS_NONE;
353  count_or_copy(&out, &out_size, buf, nal_size, ps, j);
354  if (unit_type == H264_NAL_SLICE) {
355  new_idr = 1;
356  sps_seen = 0;
357  pps_seen = 0;
358  }
359 
360  buf += nal_size;
361  } while (buf < buf_end);
362 
363  if (!j) {
364  if (out_size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
366  goto fail;
367  }
368  ret = av_new_packet(opkt, out_size);
369  if (ret < 0)
370  goto fail;
371  out = opkt->data;
372  }
373  }
374 #undef LOG_ONCE
375 
376  av_assert1(out_size == opkt->size);
377 
378  s->new_idr = new_idr;
379  s->idr_sps_seen = sps_seen;
380  s->idr_pps_seen = pps_seen;
381 
382  ret = av_packet_copy_props(opkt, in);
383  if (ret < 0)
384  goto fail;
385 
386 fail:
387  if (ret < 0)
388  av_packet_unref(opkt);
389  av_packet_free(&in);
390 
391  return ret;
392 }
393 
395 {
397 
398  av_freep(&s->sps);
399  av_freep(&s->pps);
400 }
401 
403 {
405 
406  s->idr_sps_seen = 0;
407  s->idr_pps_seen = 0;
408  s->new_idr = s->extradata_parsed;
409 }
410 
411 static const enum AVCodecID codec_ids[] = {
413 };
414 
416  .p.name = "h264_mp4toannexb",
417  .p.codec_ids = codec_ids,
418  .priv_data_size = sizeof(H264BSFContext),
421  .close = h264_mp4toannexb_close,
423 };
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:426
H264_NAL_IDR_SLICE
@ H264_NAL_IDR_SLICE
Definition: h264.h:39
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
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
bsf_internal.h
H264_NAL_SPS
@ H264_NAL_SPS
Definition: h264.h:41
out
FILE * out
Definition: movenc.c:54
GetByteContext
Definition: bytestream.h:33
AV_PKT_DATA_NEW_EXTRADATA
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:56
H264BSFContext::sps
uint8_t * sps
Definition: h264_mp4toannexb_bsf.c:35
bytestream2_skipu
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
Definition: bytestream.h:174
AVBitStreamFilter::name
const char * name
Definition: bsf.h:112
out_size
int out_size
Definition: movenc.c:55
AVPacket::data
uint8_t * data
Definition: packet.h:515
h264_mp4toannexb_filter
static int h264_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *opkt)
Definition: h264_mp4toannexb_bsf.c:233
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
H264BSFContext::extradata_parsed
int extradata_parsed
Definition: h264_mp4toannexb_bsf.c:45
filter
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
Definition: filter_design.txt:228
ff_bsf_get_packet
int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
Called by the bitstream filters to get the next packet for filtering.
Definition: bsf.c:235
PsSource
PsSource
Definition: h264_mp4toannexb_bsf.c:48
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:74
AVBSFContext
The bitstream filter state.
Definition: bsf.h:68
PS_NONE
@ PS_NONE
Definition: h264_mp4toannexb_bsf.c:50
H264BSFContext::pps_buf_size
unsigned pps_buf_size
Definition: h264_mp4toannexb_bsf.c:40
bsf.h
h264_mp4toannexb_flush
static void h264_mp4toannexb_flush(AVBSFContext *ctx)
Definition: h264_mp4toannexb_bsf.c:402
H264BSFContext::idr_sps_seen
uint8_t idr_sps_seen
Definition: h264_mp4toannexb_bsf.c:43
fail
#define fail()
Definition: checkasm.h:177
first
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But first
Definition: rate_distortion.txt:12
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
H264BSFContext::pps_size
int pps_size
Definition: h264_mp4toannexb_bsf.c:38
av_fast_realloc
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:495
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:98
codec_ids
static enum AVCodecID codec_ids[]
Definition: h264_mp4toannexb_bsf.c:411
count_or_copy
static void count_or_copy(uint8_t **out, uint64_t *out_size, const uint8_t *in, int in_size, enum PsSource ps, int copy)
Definition: h264_mp4toannexb_bsf.c:54
PS_IN_BAND
@ PS_IN_BAND
Definition: h264_mp4toannexb_bsf.c:51
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:365
ctx
AVFormatContext * ctx
Definition: movenc.c:48
H264BSFContext
Definition: h264_mp4toannexb_bsf.c:34
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:79
H264BSFContext::sps_buf_size
unsigned sps_buf_size
Definition: h264_mp4toannexb_bsf.c:39
NULL
#define NULL
Definition: coverity.c:32
FFBitStreamFilter
Definition: bsf_internal.h:27
ff_h264_mp4toannexb_bsf
const FFBitStreamFilter ff_h264_mp4toannexb_bsf
Definition: h264_mp4toannexb_bsf.c:415
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:483
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
AV_WB32
#define AV_WB32(p, v)
Definition: intreadwrite.h:417
FFBitStreamFilter::p
AVBitStreamFilter p
The public AVBitStreamFilter.
Definition: bsf_internal.h:31
AVPacket::size
int size
Definition: packet.h:516
copy
static void copy(const float *p1, float *p2, const int length)
Definition: vf_vaguedenoiser.c:185
pps
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
Definition: cbs_h264_syntax_template.c:404
size
int size
Definition: twinvq_data.h:10344
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:186
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
h264_mp4toannexb_init
static int h264_mp4toannexb_init(AVBSFContext *ctx)
Definition: h264_mp4toannexb_bsf.c:211
H264_NAL_SLICE
@ H264_NAL_SLICE
Definition: h264.h:35
av_packet_copy_props
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
Definition: avpacket.c:389
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:245
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, size_t *size)
Get side information from packet.
Definition: avpacket.c:252
H264BSFContext::length_size
uint8_t length_size
Definition: h264_mp4toannexb_bsf.c:41
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
H264BSFContext::new_idr
uint8_t new_idr
Definition: h264_mp4toannexb_bsf.c:42
ret
ret
Definition: filter_design.txt:187
H264BSFContext::pps
uint8_t * pps
Definition: h264_mp4toannexb_bsf.c:36
sps
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
Definition: cbs_h264_syntax_template.c:260
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
LOG_ONCE
#define LOG_ONCE(...)
defs.h
flush
void(* flush)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:367
mem.h
h264_extradata_to_annexb
static int h264_extradata_to_annexb(AVBSFContext *ctx, uint8_t *extradata, int extradata_size)
Definition: h264_mp4toannexb_bsf.c:83
bytestream2_get_bufferu
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:277
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVPacket
This structure stores compressed data.
Definition: packet.h:492
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
bytestream.h
h264.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
h264_mp4toannexb_close
static void h264_mp4toannexb_close(AVBSFContext *ctx)
Definition: h264_mp4toannexb_bsf.c:394
H264_NAL_PPS
@ H264_NAL_PPS
Definition: h264.h:42
AV_RB24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:97
PS_OUT_OF_BAND
@ PS_OUT_OF_BAND
Definition: h264_mp4toannexb_bsf.c:49
H264BSFContext::sps_size
int sps_size
Definition: h264_mp4toannexb_bsf.c:37
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1220
h264_mp4toannexb_save_ps
static int h264_mp4toannexb_save_ps(uint8_t **dst, int *dst_size, unsigned *dst_buf_size, const uint8_t *nal, uint32_t nal_size, int first)
Definition: h264_mp4toannexb_bsf.c:182
H264BSFContext::idr_pps_seen
uint8_t idr_pps_seen
Definition: h264_mp4toannexb_bsf.c:44