FFmpeg
target_dec_fuzzer.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /* Targeted fuzzer that targets specific codecs depending on two
20  compile-time flags.
21  INSTRUCTIONS:
22 
23  * Get the very fresh clang, e.g. see http://libfuzzer.info#versions
24  * Get and build libFuzzer:
25  svn co http://llvm.org/svn/llvm-project/llvm/trunk/lib/Fuzzer
26  ./Fuzzer/build.sh
27  * build ffmpeg for fuzzing:
28  FLAGS="-fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp -g" CC="clang $FLAGS" CXX="clang++ $FLAGS" ./configure --disable-x86asm
29  make clean && make -j
30  * build the fuzz target.
31  Choose the value of FFMPEG_CODEC (e.g. AV_CODEC_ID_DVD_SUBTITLE) and
32  choose one of FUZZ_FFMPEG_VIDEO, FUZZ_FFMPEG_AUDIO, FUZZ_FFMPEG_SUBTITLE.
33  clang -fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp tools/target_dec_fuzzer.c -o target_dec_fuzzer -I. -DFFMPEG_CODEC=AV_CODEC_ID_MPEG1VIDEO -DFUZZ_FFMPEG_VIDEO ../../libfuzzer/libFuzzer.a -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -Wl,--as-needed -Wl,-z,noexecstack -Wl,--warn-common -Wl,-rpath-link=:libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lxcb -lxcb-shm -lxcb -lxcb-xfixes -lxcb -lxcb-shape -lxcb -lX11 -lasound -lm -lbz2 -lz -pthread
34  * create a corpus directory and put some samples there (empty dir is ok too):
35  mkdir CORPUS && cp some-files CORPUS
36 
37  * Run fuzzing:
38  ./target_dec_fuzzer -max_len=100000 CORPUS
39 
40  More info:
41  http://libfuzzer.info
42  http://tutorial.libfuzzer.info
43  https://github.com/google/oss-fuzz
44  http://lcamtuf.coredump.cx/afl/
45  https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
46 */
47 
48 #include "config.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/avstring.h"
51 #include "libavutil/cpu.h"
52 #include "libavutil/imgutils.h"
53 #include "libavutil/intreadwrite.h"
54 
55 #include "libavcodec/avcodec.h"
56 #include "libavcodec/bytestream.h"
58 #include "libavformat/avformat.h"
59 
60 //For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
61 #include "libavcodec/internal.h"
62 
63 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
64 
65 extern const FFCodec * codec_list[];
66 
67 static void error(const char *err)
68 {
69  fprintf(stderr, "%s", err);
70  exit(1);
71 }
72 
73 static const FFCodec *c = NULL;
75 {
76  const AVCodec *res;
77 
79  if (!res)
80  error("Failed to find decoder");
81  return ffcodec(res);
82 }
83 
84 static int subtitle_handler(AVCodecContext *avctx, void *frame,
85  int *got_sub_ptr, AVPacket *avpkt)
86 {
88  int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
89  if (ret >= 0 && *got_sub_ptr)
91  return ret;
92 }
93 
95  int *got_frame, const AVPacket *dummy)
96 {
97  int ret = avcodec_receive_frame(avctx, frame);
98  *got_frame = ret >= 0;
99  return ret;
100 }
101 
102 // Ensure we don't loop forever
103 const uint32_t maxiteration = 8096;
104 
105 static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
106 
108 {
109  ptrdiff_t linesize1[4];
110  size_t size[4];
111  int linesize_align[AV_NUM_DATA_POINTERS];
112  int i, ret, w = frame->width, h = frame->height;
113 
114  avcodec_align_dimensions2(ctx, &w, &h, linesize_align);
115  ret = av_image_fill_linesizes(frame->linesize, ctx->pix_fmt, w);
116  if (ret < 0)
117  return ret;
118 
119  for (i = 0; i < 4 && frame->linesize[i]; i++)
120  linesize1[i] = frame->linesize[i] =
121  FFALIGN(frame->linesize[i], linesize_align[i]);
122  for (; i < 4; i++)
123  linesize1[i] = 0;
124 
125  ret = av_image_fill_plane_sizes(size, ctx->pix_fmt, h, linesize1);
126  if (ret < 0)
127  return ret;
128 
129  frame->extended_data = frame->data;
130  for (i = 0; i < 4 && size[i]; i++) {
131  frame->buf[i] = av_buffer_alloc(size[i]);
132  if (!frame->buf[i])
133  goto fail;
134  frame->data[i] = frame->buf[i]->data;
135  }
136  for (; i < AV_NUM_DATA_POINTERS; i++) {
137  frame->data[i] = NULL;
138  frame->linesize[i] = 0;
139  }
140 
141  return 0;
142 fail:
144  return AVERROR(ENOMEM);
145 }
146 
148 {
149  switch (ctx->codec_type) {
150  case AVMEDIA_TYPE_VIDEO:
151  return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
154  case AVMEDIA_TYPE_AUDIO:
156  default:
157  return AVERROR(EINVAL);
158  }
159 }
160 
161 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
162  uint64_t maxpixels_per_frame = 4096 * 4096;
163  uint64_t maxpixels;
164 
165  uint64_t maxsamples_per_frame = 256*1024*32;
166  uint64_t maxsamples;
167  const uint64_t fuzz_tag = FUZZ_TAG;
168  const uint8_t *last = data;
169  const uint8_t *end = data + size;
170  uint32_t it = 0;
171  uint64_t ec_pixels = 0;
172  uint64_t nb_samples = 0;
173  int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
174  int *got_picture_ptr,
175  const AVPacket *avpkt) = NULL;
176  AVCodecParserContext *parser = NULL;
177  uint64_t keyframes = 0;
178  uint64_t flushpattern = -1;
180 
181  if (!c) {
182 #ifdef FFMPEG_DECODER
183 #define DECODER_SYMBOL0(CODEC) ff_##CODEC##_decoder
184 #define DECODER_SYMBOL(CODEC) DECODER_SYMBOL0(CODEC)
185  extern FFCodec DECODER_SYMBOL(FFMPEG_DECODER);
186  codec_list[0] = &DECODER_SYMBOL(FFMPEG_DECODER);
187 
188 #if FFMPEG_DECODER == tiff || FFMPEG_DECODER == tdsc
189  extern FFCodec DECODER_SYMBOL(mjpeg);
190  codec_list[1] = &DECODER_SYMBOL(mjpeg);
191 #endif
192 
193  c = &DECODER_SYMBOL(FFMPEG_DECODER);
194 #else
195  c = AVCodecInitialize(FFMPEG_CODEC); // Done once.
196 #endif
198  }
199 
200  switch (c->p.type) {
201  case AVMEDIA_TYPE_AUDIO :
202  case AVMEDIA_TYPE_VIDEO : decode_handler = audio_video_handler ; break;
203  case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler ; break;
204  }
205  switch (c->p.id) {
206  case AV_CODEC_ID_APE: maxsamples_per_frame /= 256; break;
207  }
208  maxpixels = maxpixels_per_frame * maxiteration;
209  maxsamples = maxsamples_per_frame * maxiteration;
210  switch (c->p.id) {
211  case AV_CODEC_ID_AASC: maxpixels /= 1024; break;
212  case AV_CODEC_ID_AGM: maxpixels /= 1024; break;
213  case AV_CODEC_ID_ANM: maxpixels /= 1024; break;
214  case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
215  case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
216  case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
217  case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
218  case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
219  case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
220  case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
221  case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
222  case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
223  case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
224  case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
225  case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
226  case AV_CODEC_ID_DXA: maxpixels /= 32; break;
227  case AV_CODEC_ID_DXV: maxpixels /= 32; break;
228  case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
229  case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
230  case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
231  case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
232  case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
233  case AV_CODEC_ID_GEM: maxpixels /= 512; break;
234  case AV_CODEC_ID_GDV: maxpixels /= 512; break;
235  case AV_CODEC_ID_GIF: maxpixels /= 16; break;
236  case AV_CODEC_ID_H264: maxpixels /= 256; break;
237  case AV_CODEC_ID_HAP: maxpixels /= 128; break;
238  case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
239  case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
240  case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
241  case AV_CODEC_ID_IFF_ILBM: maxpixels /= 128; break;
242  case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
243  case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
244  case AV_CODEC_ID_JPEG2000: maxpixels /= 16; break;
245  case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
246  case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
247  case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
248  case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
249  case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
250  case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
251  case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
252  case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
253  case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
254  case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
255  case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
256  case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
257  case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
258  case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
259  case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
260  case AV_CODEC_ID_PNG: maxpixels /= 128; break;
261  case AV_CODEC_ID_APNG: maxpixels /= 128; break;
262  case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
263  case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
264  case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
265  case AV_CODEC_ID_RASC: maxpixels /= 16; break;
266  case AV_CODEC_ID_SANM: maxpixels /= 16; break;
267  case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
268  case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
269  case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
270  case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
271  case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
272  case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
273  case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
274  case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
275  case AV_CODEC_ID_TGV: maxpixels /= 32; break;
276  case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
277  case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
278  case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
279  case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
280  case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
281  case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
282  case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
283  case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
284  case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
285  case AV_CODEC_ID_VP5: maxpixels /= 256; break;
286  case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
287  case AV_CODEC_ID_VP7: maxpixels /= 256; break;
288  case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
289  case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
290  case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
291  case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
292  case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
293  case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
294  case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
295  case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
296  case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
297  case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
298  }
299 
300  maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
301  maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
302 
304  AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
305  if (!ctx || !parser_avctx)
306  error("Failed memory allocation");
307 
308  if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
309  ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
310 
311  ctx->max_samples = maxsamples_per_frame;
312  ctx->get_buffer2 = fuzz_get_buffer2;
313 
314  if (size > 1024) {
315  GetByteContext gbc;
316  int extradata_size;
317  int flags;
318  uint64_t request_channel_layout;
319  int64_t flags64;
320 
321  size -= 1024;
322  bytestream2_init(&gbc, data + size, 1024);
323  ctx->width = bytestream2_get_le32(&gbc);
324  ctx->height = bytestream2_get_le32(&gbc);
325  ctx->bit_rate = bytestream2_get_le64(&gbc);
326  ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
327  // Try to initialize a parser for this codec, note, this may fail which just means we test without one
328  flags = bytestream2_get_byte(&gbc);
329  if (flags & 1)
330  parser = av_parser_init(c->p.id);
331  if (flags & 2)
333  if (flags & 4) {
334  ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
335  if (flags & 8)
336  ctx->err_recognition |= AV_EF_EXPLODE;
337  }
338  if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
339  ctx->flags2 |= AV_CODEC_FLAG2_FAST;
340  if (flags & 0x80)
341  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
342 
343  if (flags & 0x40)
345 
346  extradata_size = bytestream2_get_le32(&gbc);
347 
348  ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
349  ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
350  ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
351  ctx->codec_tag = bytestream2_get_le32(&gbc);
352  if (c->codec_tags) {
353  int n;
354  for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
355  ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
356  }
357  keyframes = bytestream2_get_le64(&gbc);
358  request_channel_layout = bytestream2_get_le64(&gbc);
359 
360  ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
361  flushpattern = bytestream2_get_le64(&gbc);
362  ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
363 
364 
365  if (flags & 0x20) {
366  switch (ctx->codec_id) {
367  case AV_CODEC_ID_AC3:
368  case AV_CODEC_ID_EAC3:
369  av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
370  av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
371  av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
372  av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
373  break;
374  }
375  }
376 
377  // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
378  // remain reproducible.
379  if (request_channel_layout) {
380  switch (ctx->codec_id) {
381  case AV_CODEC_ID_AC3:
382  case AV_CODEC_ID_EAC3:
383  case AV_CODEC_ID_MLP:
384  case AV_CODEC_ID_TRUEHD:
385  case AV_CODEC_ID_DTS:
386  if (request_channel_layout & ~INT64_MIN) {
387  char *downmix_layout = av_mallocz(19);
388  if (!downmix_layout)
389  error("Failed memory allocation");
390  av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
391  av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
392  }
393  if (ctx->codec_id != AV_CODEC_ID_DTS)
394  break;
395  // fall-through
396  case AV_CODEC_ID_DOLBY_E:
397  av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
398  break;
399  }
400  }
401 
402  flags64 = bytestream2_get_le64(&gbc);
403  if (flags64 &1)
404  ctx->debug |= FF_DEBUG_SKIP;
405  if (flags64 &2)
406  ctx->debug |= FF_DEBUG_QP;
407  if (flags64 &4)
409  if (flags64 & 8)
410  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
411  if (flags64 & 0x10)
412  ctx->err_recognition |= AV_EF_CRCCHECK;
413 
414  ctx->workaround_bugs = bytestream2_get_le32(&gbc);
415 
416  if (extradata_size < size) {
417  ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
418  if (ctx->extradata) {
419  ctx->extradata_size = extradata_size;
420  size -= ctx->extradata_size;
421  memcpy(ctx->extradata, data + size, ctx->extradata_size);
422  }
423  }
424  if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
425  ctx->width = ctx->height = 0;
426  }
427 
428  int res = avcodec_open2(ctx, &c->p, &opts);
429  if (res < 0) {
431  av_free(parser_avctx);
432  av_parser_close(parser);
433  av_dict_free(&opts);
434  return 0; // Failure of avcodec_open2() does not imply that a issue was found
435  }
436  parser_avctx->codec_id = ctx->codec_id;
437  parser_avctx->extradata_size = ctx->extradata_size;
438  parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
439 
440 
441  int got_frame;
443  AVPacket *avpkt = av_packet_alloc();
444  AVPacket *parsepkt = av_packet_alloc();
445  if (!frame || !avpkt || !parsepkt)
446  error("Failed memory allocation");
447 
448  // Read very simple container
449  while (data < end && it < maxiteration) {
450  // Search for the TAG
451  while (data + sizeof(fuzz_tag) < end) {
452  if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
453  break;
454  data++;
455  }
456  if (data + sizeof(fuzz_tag) > end)
457  data = end;
458 
459  res = av_new_packet(parsepkt, data - last);
460  if (res < 0)
461  error("Failed memory allocation");
462  memcpy(parsepkt->data, last, data - last);
463  parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
464  keyframes = (keyframes >> 2) + (keyframes<<62);
465  data += sizeof(fuzz_tag);
466  last = data;
467 
468  while (parsepkt->size > 0) {
469  int decode_more;
470 
471  if (parser) {
472  int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
473  parsepkt->data, parsepkt->size,
474  parsepkt->pts, parsepkt->dts, parsepkt->pos);
475  if (avpkt->data == parsepkt->data) {
476  avpkt->buf = av_buffer_ref(parsepkt->buf);
477  if (!avpkt->buf)
478  error("Failed memory allocation");
479  } else {
480  if (av_packet_make_refcounted(avpkt) < 0)
481  error("Failed memory allocation");
482  }
483  parsepkt->data += ret;
484  parsepkt->size -= ret;
485  parsepkt->pos += ret;
486  avpkt->pts = parser->pts;
487  avpkt->dts = parser->dts;
488  avpkt->pos = parser->pos;
489  if ( parser->key_frame == 1 ||
490  (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
491  avpkt->flags |= AV_PKT_FLAG_KEY;
492  avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
493  } else {
494  av_packet_move_ref(avpkt, parsepkt);
495  }
496 
497  if (!(flushpattern & 7))
499  flushpattern = (flushpattern >> 3) + (flushpattern << 61);
500 
501  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
502  int ret = avcodec_send_packet(ctx, avpkt);
503  decode_more = ret >= 0;
504  if(!decode_more) {
505  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
506  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
507  ctx->error_concealment = 0;
509  }
510  if (ec_pixels > maxpixels)
511  goto maximums_reached;
512  }
513  } else
514  decode_more = 1;
515 
516  // Iterate through all data
517  while (decode_more && it++ < maxiteration) {
519  int ret = decode_handler(ctx, frame, &got_frame, avpkt);
520 
521  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
522  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
523  ctx->error_concealment = 0;
525  }
526  if (ec_pixels > maxpixels)
527  goto maximums_reached;
528 
529  if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
530  frame->nb_samples == 0 && !got_frame &&
531  (avpkt->flags & AV_PKT_FLAG_DISCARD))
532  nb_samples += ctx->max_samples;
533 
534  nb_samples += frame->nb_samples;
535  if (nb_samples > maxsamples)
536  goto maximums_reached;
537 
538  if (ret <= 0 || ret > avpkt->size)
539  break;
540 
541  if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
542  avpkt->data += ret;
543  avpkt->size -= ret;
544  decode_more = avpkt->size > 0;
545  } else
546  decode_more = ret >= 0;
547  }
548  av_packet_unref(avpkt);
549  }
550  av_packet_unref(parsepkt);
551  }
552 maximums_reached:
553 
554  av_packet_unref(avpkt);
555 
556  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
558 
559  do {
560  got_frame = 0;
562  decode_handler(ctx, frame, &got_frame, avpkt);
563 
564  nb_samples += frame->nb_samples;
565  if (nb_samples > maxsamples)
566  break;
567  } while (got_frame == 1 && it++ < maxiteration);
568 
569  fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
570 
573  avcodec_free_context(&parser_avctx);
574  av_parser_close(parser);
575  av_packet_free(&avpkt);
576  av_packet_free(&parsepkt);
577  av_dict_free(&opts);
578  return 0;
579 }
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:127
AVSubtitle
Definition: avcodec.h:2314
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:422
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:73
AVCodec
AVCodec.
Definition: codec.h:204
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h:142
AV_CODEC_ID_SANM
@ AV_CODEC_ID_SANM
Definition: codec_id.h:232
AV_CODEC_ID_LAGARITH
@ AV_CODEC_ID_LAGARITH
Definition: codec_id.h:197
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:2819
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:432
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
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:461
AV_CODEC_ID_TQI
@ AV_CODEC_ID_TQI
Definition: codec_id.h:172
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1314
AVCodecParserContext::pict_type
int pict_type
Definition: avcodec.h:2808
GetByteContext
Definition: bytestream.h:33
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: codec_id.h:507
sub
static float sub(float src0, float src1)
Definition: dnn_backend_native_layer_mathbinary.c:31
AV_CODEC_ID_LOCO
@ AV_CODEC_ID_LOCO
Definition: codec_id.h:122
AV_LOG_PANIC
#define AV_LOG_PANIC
Something went really wrong and we will crash now.
Definition: log.h:167
AV_PKT_FLAG_DISCARD
#define AV_PKT_FLAG_DISCARD
Flag is used to discard packets which are required to maintain valid decoder state but are not requir...
Definition: packet.h:436
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:166
AV_CODEC_ID_MVC2
@ AV_CODEC_ID_MVC2
Definition: codec_id.h:235
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:116
AV_RN64
#define AV_RN64(p)
Definition: intreadwrite.h:368
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
w
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1510
AV_CODEC_ID_MWSC
@ AV_CODEC_ID_MWSC
Definition: codec_id.h:288
avcodec_decode_subtitle2
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)
Decode a subtitle message.
Definition: decode.c:875
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:100
data
const char data[16]
Definition: mxf.c:146
AV_CODEC_ID_CDTOONS
@ AV_CODEC_ID_CDTOONS
Definition: codec_id.h:299
FFCodec
Definition: codec_internal.h:118
c
static const FFCodec * c
Definition: target_dec_fuzzer.c:73
AV_CODEC_ID_GDV
@ AV_CODEC_ID_GDV
Definition: codec_id.h:284
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: codec_id.h:292
AV_CODEC_ID_SCREENPRESSO
@ AV_CODEC_ID_SCREENPRESSO
Definition: codec_id.h:242
AV_EF_COMPLIANT
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:1368
AVDictionary
Definition: dict.c:30
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:441
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
AV_CODEC_ID_APNG
@ AV_CODEC_ID_APNG
Definition: codec_id.h:264
AV_CODEC_ID_MXPEG
@ AV_CODEC_ID_MXPEG
Definition: codec_id.h:196
av_strlcatf
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:104
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:473
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
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:73
AV_CODEC_ID_DSICINVIDEO
@ AV_CODEC_ID_DSICINVIDEO
Definition: codec_id.h:144
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:312
AVCodecParserContext::key_frame
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:2849
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:122
AV_CODEC_ID_IFF_ILBM
@ AV_CODEC_ID_IFF_ILBM
Definition: codec_id.h:186
fail
#define fail()
Definition: checkasm.h:131
AV_CODEC_ID_MSZH
@ AV_CODEC_ID_MSZH
Definition: codec_id.h:103
dummy
int dummy
Definition: motion.c:65
AV_CODEC_ID_SMACKAUDIO
@ AV_CODEC_ID_SMACKAUDIO
Definition: codec_id.h:452
av_parser_init
AVCodecParserContext * av_parser_init(int codec_id)
Definition: parser.c:32
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: codec_id.h:497
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2820
FF_CODEC_TAGS_END
#define FF_CODEC_TAGS_END
FFCodec.codec_tags termination value.
Definition: codec_internal.h:86
avsubtitle_free
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: avcodec.c:418
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:72
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:104
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:530
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1322
avassert.h
LLVMFuzzerTestOneInput
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
Definition: target_dec_fuzzer.c:161
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: codec_id.h:266
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:500
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:149
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
intreadwrite.h
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:97
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: codec_id.h:218
AV_CODEC_ID_WS_VQA
@ AV_CODEC_ID_WS_VQA
Definition: codec_id.h:94
AV_CODEC_ID_ARGO
@ AV_CODEC_ID_ARGO
Definition: codec_id.h:306
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:68
avcodec_receive_frame
int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder or encoder (when the AV_CODEC_FLAG_RECON_FRAME flag is used...
Definition: avcodec.c:725
ctx
AVFormatContext * ctx
Definition: movenc.c:48
avcodec_align_dimensions2
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
Definition: utils.c:140
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:374
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:513
AV_CODEC_ID_VC1IMAGE
@ AV_CODEC_ID_VC1IMAGE
Definition: codec_id.h:202
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:77
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:408
AV_CODEC_ID_PNG
@ AV_CODEC_ID_PNG
Definition: codec_id.h:111
if
if(ret)
Definition: filter_design.txt:179
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:54
AV_CODEC_ID_WMV3
@ AV_CODEC_ID_WMV3
Definition: codec_id.h:121
opts
AVDictionary * opts
Definition: movenc.c:50
FUZZ_TAG
static const uint64_t FUZZ_TAG
Definition: target_dec_fuzzer.c:105
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:357
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:510
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: codec_id.h:211
AVCodec::type
enum AVMediaType type
Definition: codec.h:217
av_image_fill_plane_sizes
int av_image_fill_plane_sizes(size_t sizes[4], enum AVPixelFormat pix_fmt, int height, const ptrdiff_t linesizes[4])
Fill plane sizes for an image with pixel format pix_fmt and height height.
Definition: imgutils.c:111
avcodec_free_context
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
Definition: options.c:164
FF_DEBUG_MB_TYPE
#define FF_DEBUG_MB_TYPE
Definition: avcodec.h:1335
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: codec_id.h:467
AV_CODEC_ID_CINEPAK
@ AV_CODEC_ID_CINEPAK
Definition: codec_id.h:93
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: codec_id.h:169
AV_CODEC_FLAG2_FAST
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:303
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AV_CODEC_ID_ANM
@ AV_CODEC_ID_ANM
Definition: codec_id.h:184
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:115
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1364
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:479
AV_CODEC_ID_VP4
@ AV_CODEC_ID_VP4
Definition: codec_id.h:295
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:474
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:67
AV_EF_CAREFUL
#define AV_EF_CAREFUL
consider things that violate the spec, are fast to calculate and have not been seen in the wild as er...
Definition: avcodec.h:1367
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
avcodec_find_decoder
const AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:939
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:469
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: codec_id.h:294
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: codec_id.h:289
subtitle_handler
static int subtitle_handler(AVCodecContext *avctx, void *frame, int *got_sub_ptr, AVPacket *avpkt)
Definition: target_dec_fuzzer.c:84
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AV_CODEC_ID_SCPR
@ AV_CODEC_ID_SCPR
Definition: codec_id.h:276
AVPacket::size
int size
Definition: packet.h:375
codec_internal.h
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: codec_id.h:271
cpu.h
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: codec_id.h:290
codec_list
const FFCodec * codec_list[]
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: codec_id.h:241
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:433
size
int size
Definition: twinvq_data.h:10344
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:326
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:279
AV_CODEC_ID_MSRLE
@ AV_CODEC_ID_MSRLE
Definition: codec_id.h:95
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:489
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
AV_CODEC_ID_MMVIDEO
@ AV_CODEC_ID_MMVIDEO
Definition: codec_id.h:130
av_packet_make_refcounted
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:485
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:62
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
av_buffer_alloc
AVBufferRef * av_buffer_alloc(size_t size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:77
AV_CODEC_ID_DXA
@ AV_CODEC_ID_DXA
Definition: codec_id.h:148
AV_CODEC_ID_INDEO4
@ AV_CODEC_ID_INDEO4
Definition: codec_id.h:161
AV_CODEC_ID_MSS2
@ AV_CODEC_ID_MSS2
Definition: codec_id.h:217
AVCodec::id
enum AVCodecID id
Definition: codec.h:218
AV_CODEC_ID_HQ_HQA
@ AV_CODEC_ID_HQ_HQA
Definition: codec_id.h:238
AV_CODEC_ID_VP5
@ AV_CODEC_ID_VP5
Definition: codec_id.h:140
AV_CODEC_ID_VP3
@ AV_CODEC_ID_VP3
Definition: codec_id.h:79
AV_CODEC_ID_GIF
@ AV_CODEC_ID_GIF
Definition: codec_id.h:147
AV_CODEC_ID_TGV
@ AV_CODEC_ID_TGV
Definition: codec_id.h:170
AV_CODEC_ID_VP7
@ AV_CODEC_ID_VP7
Definition: codec_id.h:231
avcodec_default_get_buffer2
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: get_buffer.c:290
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:637
av_log_set_level
void av_log_set_level(int level)
Set the log level.
Definition: log.c:442
AVCodecParserContext::pos
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:2902
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:499
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: codec_id.h:80
FF_DEBUG_SKIP
#define FF_DEBUG_SKIP
Definition: avcodec.h:1338
AV_CODEC_ID_PAF_VIDEO
@ AV_CODEC_ID_PAF_VIDEO
Definition: codec_id.h:229
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:224
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_HNM4_VIDEO
@ AV_CODEC_ID_HNM4_VIDEO
Definition: codec_id.h:223
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:487
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:264
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:120
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:138
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2800
AVCodecInitialize
static const FFCodec * AVCodecInitialize(enum AVCodecID codec_id)
Definition: target_dec_fuzzer.c:74
fuzz_video_get_buffer
static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
Definition: target_dec_fuzzer.c:107
AV_CODEC_ID_SMACKVIDEO
@ AV_CODEC_ID_SMACKVIDEO
Definition: codec_id.h:133
ret
ret
Definition: filter_design.txt:187
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: avcodec.c:375
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
AV_EF_CRCCHECK
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data,...
Definition: avcodec.h:1361
avformat.h
audio_video_handler
static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame, int *got_frame, const AVPacket *dummy)
Definition: target_dec_fuzzer.c:94
FF_DEBUG_QP
#define FF_DEBUG_QP
Definition: avcodec.h:1336
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS
#define AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS
Decoding only.
Definition: avcodec.h:366
fuzz_get_buffer2
static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
Definition: target_dec_fuzzer.c:147
AV_CODEC_ID_AGM
@ AV_CODEC_ID_AGM
Definition: codec_id.h:293
AVFormatContext::debug
int debug
Flags to enable debugging.
Definition: avformat.h:1485
AVCodecContext
main external API structure.
Definition: avcodec.h:398
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:262
AV_CODEC_ID_HAP
@ AV_CODEC_ID_HAP
Definition: codec_id.h:239
AV_CODEC_ID_BINKVIDEO
@ AV_CODEC_ID_BINKVIDEO
Definition: codec_id.h:185
FFCodec::codec_tags
const uint32_t * codec_tags
List of supported codec_tags, terminated by FF_CODEC_TAGS_END.
Definition: codec_internal.h:257
AV_CODEC_ID_SIMBIOSIS_IMX
@ AV_CODEC_ID_SIMBIOSIS_IMX
Definition: codec_id.h:308
AV_CODEC_ID_MSA1
@ AV_CODEC_ID_MSA1
Definition: codec_id.h:213
AV_CODEC_ID_VMNC
@ AV_CODEC_ID_VMNC
Definition: codec_id.h:139
AV_EF_AGGRESSIVE
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:1369
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it.
Definition: dict.c:147
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_parser_parse2
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
Definition: parser.c:115
AV_CODEC_ID_QTRLE
@ AV_CODEC_ID_QTRLE
Definition: codec_id.h:105
AV_CODEC_ID_GEM
@ AV_CODEC_ID_GEM
Definition: codec_id.h:310
AV_CODEC_EXPORT_DATA_MVS
#define AV_CODEC_EXPORT_DATA_MVS
Export motion vectors through frame side data.
Definition: avcodec.h:357
it
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s it
Definition: writing_filters.txt:31
AV_CODEC_ID_G2M
@ AV_CODEC_ID_G2M
Definition: codec_id.h:221
AV_CODEC_ID_TSCC
@ AV_CODEC_ID_TSCC
Definition: codec_id.h:106
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:351
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: codec_id.h:491
bytestream.h
imgutils.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:454
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: codec_id.h:449
h
h
Definition: vp9dsp_template.c:2038
AV_CODEC_ID_TARGA
@ AV_CODEC_ID_TARGA
Definition: codec_id.h:143
AV_CODEC_ID_VORBIS
@ AV_CODEC_ID_VORBIS
Definition: codec_id.h:434
AV_CODEC_ID_WMV3IMAGE
@ AV_CODEC_ID_WMV3IMAGE
Definition: codec_id.h:201
avstring.h
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:318
FF_SANE_NB_CHANNELS
#define FF_SANE_NB_CHANNELS
Definition: internal.h:40
AV_CODEC_ID_FLV1
@ AV_CODEC_ID_FLV1
Definition: codec_id.h:71
AV_CODEC_ID_DFA
@ AV_CODEC_ID_DFA
Definition: codec_id.h:200
int
int
Definition: ffmpeg_filter.c:155
AV_CODEC_ID_AASC
@ AV_CODEC_ID_AASC
Definition: codec_id.h:124
maxiteration
const uint32_t maxiteration
Definition: target_dec_fuzzer.c:103
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: codec_id.h:458
av_parser_close
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:189
AV_CODEC_ID_PRORES
@ AV_CODEC_ID_PRORES
Definition: codec_id.h:198