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 #include "libavutil/mem.h"
55 
56 #include "libavcodec/avcodec.h"
57 #include "libavcodec/bytestream.h"
58 #include "libavcodec/codec_internal.h"
59 #include "libavformat/avformat.h"
60 
61 //For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
62 #include "libavcodec/internal.h"
63 
64 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
65 
66 extern const FFCodec * codec_list[];
67 
68 static void error(const char *err)
69 {
70  fprintf(stderr, "%s", err);
71  exit(1);
72 }
73 
74 static const FFCodec *c = NULL;
75 static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
76 {
77  const AVCodec *res;
78 
79  res = avcodec_find_decoder(codec_id);
80  if (!res)
81  error("Failed to find decoder");
82  return ffcodec(res);
83 }
84 
85 static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
86  int *got_sub_ptr, const AVPacket *avpkt)
87 {
88  AVSubtitle sub;
89  int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
90  if (ret >= 0 && *got_sub_ptr)
91  avsubtitle_free(&sub);
92  return ret;
93 }
94 
95 static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame,
96  int *got_frame, const AVPacket *dummy)
97 {
98  int ret = avcodec_receive_frame(avctx, frame);
99  *got_frame = ret >= 0;
100  return ret;
101 }
102 
103 // Ensure we don't loop forever
104 const uint32_t maxiteration = 8096;
105 
106 static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
107 
108 static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
109 {
110  ptrdiff_t linesize1[4];
111  size_t size[4];
112  int linesize_align[AV_NUM_DATA_POINTERS];
113  int i, ret, w = frame->width, h = frame->height;
114 
115  avcodec_align_dimensions2(ctx, &w, &h, linesize_align);
116  ret = av_image_fill_linesizes(frame->linesize, ctx->pix_fmt, w);
117  if (ret < 0)
118  return ret;
119 
120  for (i = 0; i < 4 && frame->linesize[i]; i++)
121  linesize1[i] = frame->linesize[i] =
122  FFALIGN(frame->linesize[i], linesize_align[i]);
123  for (; i < 4; i++)
124  linesize1[i] = 0;
125 
126  ret = av_image_fill_plane_sizes(size, ctx->pix_fmt, h, linesize1);
127  if (ret < 0)
128  return ret;
129 
130  frame->extended_data = frame->data;
131  for (i = 0; i < 4 && size[i]; i++) {
132  switch(ctx->codec_id) {
133  case AV_CODEC_ID_FFV1:
134  frame->buf[i] = av_buffer_alloc(size[i]);
135  break;
136  default:
137  frame->buf[i] = av_buffer_allocz(size[i]);
138  }
139 
140  if (!frame->buf[i])
141  goto fail;
142  frame->data[i] = frame->buf[i]->data;
143  }
144  for (; i < AV_NUM_DATA_POINTERS; i++) {
145  frame->data[i] = NULL;
146  frame->linesize[i] = 0;
147  }
148 
149  return 0;
150 fail:
151  av_frame_unref(frame);
152  return AVERROR(ENOMEM);
153 }
154 
155 static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
156 {
157  switch (ctx->codec_type) {
158  case AVMEDIA_TYPE_VIDEO:
159  return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
160  ? fuzz_video_get_buffer(ctx, frame)
161  : avcodec_default_get_buffer2(ctx, frame, flags);
162  case AVMEDIA_TYPE_AUDIO:
163  return avcodec_default_get_buffer2(ctx, frame, flags);
164  default:
165  return AVERROR(EINVAL);
166  }
167 }
168 
169 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
170  uint64_t maxpixels_per_frame = 4096 * 4096;
171  uint64_t maxpixels;
172 
173  uint64_t maxsamples_per_frame = 256*1024*32;
174  uint64_t maxsamples;
175  const uint64_t fuzz_tag = FUZZ_TAG;
176  const uint8_t *last = data;
177  const uint8_t *end = data + size;
178  uint32_t it = 0;
179  uint64_t ec_pixels = 0;
180  uint64_t nb_samples = 0;
181  int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
182  int *got_picture_ptr,
183  const AVPacket *avpkt) = NULL;
184  AVCodecParserContext *parser = NULL;
185  uint64_t keyframes = 0;
186  uint64_t flushpattern = -1;
187  AVDictionary *opts = NULL;
188 
189  if (!c) {
190 #ifdef FFMPEG_DECODER
191 #define DECODER_SYMBOL0(CODEC) ff_##CODEC##_decoder
192 #define DECODER_SYMBOL(CODEC) DECODER_SYMBOL0(CODEC)
193  extern FFCodec DECODER_SYMBOL(FFMPEG_DECODER);
194  codec_list[0] = &DECODER_SYMBOL(FFMPEG_DECODER);
195 
196 #if FFMPEG_DECODER == tiff || FFMPEG_DECODER == tdsc
197  extern FFCodec DECODER_SYMBOL(mjpeg);
198  codec_list[1] = &DECODER_SYMBOL(mjpeg);
199 #endif
200 
201  c = &DECODER_SYMBOL(FFMPEG_DECODER);
202 #else
203  c = AVCodecInitialize(FFMPEG_CODEC); // Done once.
204 #endif
205  av_log_set_level(AV_LOG_PANIC);
206  }
207 
208  switch (c->p.type) {
209  case AVMEDIA_TYPE_AUDIO :
210  case AVMEDIA_TYPE_VIDEO : decode_handler = audio_video_handler ; break;
211  case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler ; break;
212  }
213  switch (c->p.id) {
214  case AV_CODEC_ID_APE: maxsamples_per_frame /= 256; break;
215  }
216  maxpixels = maxpixels_per_frame * maxiteration;
217  maxsamples = maxsamples_per_frame * maxiteration;
218  switch (c->p.id) {
219  case AV_CODEC_ID_AASC: maxpixels /= 1024; break;
220  case AV_CODEC_ID_AGM: maxpixels /= 1024; break;
221  case AV_CODEC_ID_ANM: maxpixels /= 1024; break;
222  case AV_CODEC_ID_APE: maxsamples /= 16384; break;
223  case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
224  case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
225  case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
226  case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
227  case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
228  case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
229  case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
230  case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
231  case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
232  case AV_CODEC_ID_CSCD: maxpixels /= 1024; break;
233  case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
234  case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
235  case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
236  case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
237  case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
238  case AV_CODEC_ID_DXA: maxpixels /= 32; break;
239  case AV_CODEC_ID_DXV: maxpixels /= 32; break;
240  case AV_CODEC_ID_EXR: maxpixels /= 1024; break;
241  case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
242  case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
243  case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
244  case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
245  case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
246  case AV_CODEC_ID_FMVC: maxpixels /= 1024; break;
247  case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
248  case AV_CODEC_ID_GEM: maxpixels /= 512; break;
249  case AV_CODEC_ID_GDV: maxpixels /= 512; break;
250  case AV_CODEC_ID_GIF: maxpixels /= 16; break;
251  case AV_CODEC_ID_H264: maxpixels /= 256; break;
252  case AV_CODEC_ID_HAP: maxpixels /= 128; break;
253  case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
254  case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
255  case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
256  case AV_CODEC_ID_IFF_ILBM: maxpixels /= 4096; break;
257  case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
258  case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
259  case AV_CODEC_ID_JPEG2000: maxpixels /= 16384; break;
260  case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
261  case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
262  case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
263  case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
264  case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
265  case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
266  case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
267  case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
268  case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
269  case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
270  case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
271  case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
272  case AV_CODEC_ID_MV30: maxpixels /= 128; break;
273  case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
274  case AV_CODEC_ID_MVHA: maxpixels /= 16384; break;
275  case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
276  case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
277  case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
278  case AV_CODEC_ID_NUV: maxpixels /= 128; break;
279  case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
280  case AV_CODEC_ID_PNG: maxpixels /= 128; break;
281  case AV_CODEC_ID_APNG: maxpixels /= 128; break;
282  case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
283  case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
284  case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
285  case AV_CODEC_ID_QPEG: maxpixels /= 256; break;
286  case AV_CODEC_ID_RKA: maxsamples /= 1<<20; break;
287  case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
288  case AV_CODEC_ID_RASC: maxpixels /= 256; break;
289  case AV_CODEC_ID_RTV1: maxpixels /= 16; break;
290  case AV_CODEC_ID_RV30: maxpixels /= 256; break;
291  case AV_CODEC_ID_SANM: maxpixels /= 16; break;
292  case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
293  case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
294  case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
295  case AV_CODEC_ID_SPEEX: maxsamples /= 128; break;
296  case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
297  case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
298  case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
299  case AV_CODEC_ID_SRGC: maxpixels /= 128; break;
300  case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
301  case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
302  case AV_CODEC_ID_TGV: maxpixels /= 32; break;
303  case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
304  case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
305  case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
306  case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
307  case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
308  case AV_CODEC_ID_VB: maxpixels /= 1024; break;
309  case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
310  case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
311  case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
312  case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
313  case AV_CODEC_ID_VMIX: maxpixels /= 8192; break;
314  case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
315  case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
316  case AV_CODEC_ID_VP5: maxpixels /= 256; break;
317  case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
318  case AV_CODEC_ID_VP6A: maxpixels /= 4096; break;
319  case AV_CODEC_ID_VP7: maxpixels /= 256; break;
320  case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
321  case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
322  case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
323  case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
324  case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
325  case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
326  case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
327  case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
328  case AV_CODEC_ID_WMAPRO: maxsamples /= 16384; break;
329  case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
330  case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
331  case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
332  }
333 
334  maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
335  maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
336 
337  AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
338  AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
339  if (!ctx || !parser_avctx)
340  error("Failed memory allocation");
341 
342  if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
343  ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
344 
345  ctx->max_samples = maxsamples_per_frame;
346  ctx->get_buffer2 = fuzz_get_buffer2;
347  if (c->p.capabilities & AV_CODEC_CAP_EXPERIMENTAL)
348  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
349 
350  if (size > 1024) {
351  GetByteContext gbc;
352  int extradata_size;
353  int flags;
354  uint64_t request_channel_layout;
355  int64_t flags64;
356 
357  size -= 1024;
358  bytestream2_init(&gbc, data + size, 1024);
359  ctx->width = bytestream2_get_le32(&gbc);
360  ctx->height = bytestream2_get_le32(&gbc);
361  ctx->bit_rate = bytestream2_get_le64(&gbc);
362  ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
363  // Try to initialize a parser for this codec, note, this may fail which just means we test without one
364  flags = bytestream2_get_byte(&gbc);
365  if (flags & 1)
366  parser = av_parser_init(c->p.id);
367  if (flags & 2)
368  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
369  if (flags & 4) {
370  ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
371  if (flags & 8)
372  ctx->err_recognition |= AV_EF_EXPLODE;
373  }
374  if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
375  ctx->flags2 |= AV_CODEC_FLAG2_FAST;
376  if (flags & 0x80)
377  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
378 
379  if (flags & 0x40)
380  av_force_cpu_flags(0);
381 
382  extradata_size = bytestream2_get_le32(&gbc);
383 
384  ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
385  ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
386  ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
387  ctx->codec_tag = bytestream2_get_le32(&gbc);
388  if (c->codec_tags) {
389  int n;
390  for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
391  ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
392  }
393  keyframes = bytestream2_get_le64(&gbc);
394  request_channel_layout = bytestream2_get_le64(&gbc);
395 
396  ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
397  flushpattern = bytestream2_get_le64(&gbc);
398  ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
399 
400 
401  if (flags & 0x20) {
402  switch (ctx->codec_id) {
403  case AV_CODEC_ID_AC3:
404  case AV_CODEC_ID_EAC3:
405  av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
406  av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
407  av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
408  av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
409  break;
410  }
411  }
412 
413  // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
414  // remain reproducible.
415  if (request_channel_layout) {
416  switch (ctx->codec_id) {
417  case AV_CODEC_ID_AC3:
418  case AV_CODEC_ID_EAC3:
419  case AV_CODEC_ID_MLP:
420  case AV_CODEC_ID_TRUEHD:
421  case AV_CODEC_ID_DTS:
422  if (request_channel_layout & ~INT64_MIN) {
423  char *downmix_layout = av_mallocz(19);
424  if (!downmix_layout)
425  error("Failed memory allocation");
426  av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
427  av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
428  }
429  if (ctx->codec_id != AV_CODEC_ID_DTS)
430  break;
431  // fall-through
432  case AV_CODEC_ID_DOLBY_E:
433  av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
434  break;
435  }
436  }
437 
438  flags64 = bytestream2_get_le64(&gbc);
439  if (flags64 &1)
440  ctx->debug |= FF_DEBUG_SKIP;
441  if (flags64 &2)
442  ctx->debug |= FF_DEBUG_QP;
443  if (flags64 &4)
444  ctx->debug |= FF_DEBUG_MB_TYPE;
445  if (flags64 & 8)
446  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
447  if (flags64 & 0x10)
448  ctx->err_recognition |= AV_EF_CRCCHECK;
449 
450  ctx->workaround_bugs = bytestream2_get_le32(&gbc);
451 
452  if (c->p.max_lowres) {
453  ctx->lowres = bytestream2_get_byte(&gbc) % (c->p.max_lowres+1);
454  }
455 
456  if (extradata_size < size) {
457  ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
458  if (ctx->extradata) {
459  ctx->extradata_size = extradata_size;
460  size -= ctx->extradata_size;
461  memcpy(ctx->extradata, data + size, ctx->extradata_size);
462  }
463  }
464  if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
465  ctx->width = ctx->height = 0;
466  }
467 
468  int res = avcodec_open2(ctx, &c->p, &opts);
469  if (res < 0) {
470  avcodec_free_context(&ctx);
471  av_free(parser_avctx);
472  av_parser_close(parser);
473  av_dict_free(&opts);
474  return 0; // Failure of avcodec_open2() does not imply that a issue was found
475  }
476  parser_avctx->codec_id = ctx->codec_id;
477  parser_avctx->extradata_size = ctx->extradata_size;
478  parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
479 
480 
481  int got_frame;
482  AVFrame *frame = av_frame_alloc();
483  AVPacket *avpkt = av_packet_alloc();
484  AVPacket *parsepkt = av_packet_alloc();
485  if (!frame || !avpkt || !parsepkt)
486  error("Failed memory allocation");
487 
488  // Read very simple container
489  while (data < end && it < maxiteration) {
490  // Search for the TAG
491  while (data + sizeof(fuzz_tag) < end) {
492  if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
493  break;
494  data++;
495  }
496  if (data + sizeof(fuzz_tag) > end)
497  data = end;
498 
499  res = av_new_packet(parsepkt, data - last);
500  if (res < 0)
501  error("Failed memory allocation");
502  memcpy(parsepkt->data, last, data - last);
503  parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
504  keyframes = (keyframes >> 2) + (keyframes<<62);
505  data += sizeof(fuzz_tag);
506  last = data;
507 
508  while (parsepkt->size > 0) {
509  int decode_more;
510 
511  if (parser) {
512  int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
513  parsepkt->data, parsepkt->size,
514  parsepkt->pts, parsepkt->dts, parsepkt->pos);
515  if (avpkt->data == parsepkt->data) {
516  avpkt->buf = av_buffer_ref(parsepkt->buf);
517  if (!avpkt->buf)
518  error("Failed memory allocation");
519  } else {
520  if (av_packet_make_refcounted(avpkt) < 0)
521  error("Failed memory allocation");
522  }
523  parsepkt->data += ret;
524  parsepkt->size -= ret;
525  parsepkt->pos += ret;
526  avpkt->pts = parser->pts;
527  avpkt->dts = parser->dts;
528  avpkt->pos = parser->pos;
529  if ( parser->key_frame == 1 ||
530  (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
531  avpkt->flags |= AV_PKT_FLAG_KEY;
532  avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
533  } else {
534  av_packet_move_ref(avpkt, parsepkt);
535  }
536 
537  if (!(flushpattern & 7))
538  avcodec_flush_buffers(ctx);
539  flushpattern = (flushpattern >> 3) + (flushpattern << 61);
540 
541  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
542  int ret = avcodec_send_packet(ctx, avpkt);
543  decode_more = ret >= 0;
544  if(!decode_more) {
545  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
546  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
547  ctx->error_concealment = 0;
548  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
549  }
550  if (ec_pixels > maxpixels)
551  goto maximums_reached;
552  }
553  } else
554  decode_more = 1;
555 
556  // Iterate through all data
557  while (decode_more && it++ < maxiteration) {
558  av_frame_unref(frame);
559  int ret = decode_handler(ctx, frame, &got_frame, avpkt);
560 
561  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
562  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
563  ctx->error_concealment = 0;
564  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
565  }
566  if (ec_pixels > maxpixels)
567  goto maximums_reached;
568 
569  if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
570  frame->nb_samples == 0 && !got_frame &&
571  (avpkt->flags & AV_PKT_FLAG_DISCARD))
572  nb_samples += ctx->max_samples;
573 
574  nb_samples += frame->nb_samples;
575  if (nb_samples > maxsamples)
576  goto maximums_reached;
577 
578  if (ret <= 0 || ret > avpkt->size)
579  break;
580 
581  if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
582  avpkt->data += ret;
583  avpkt->size -= ret;
584  decode_more = avpkt->size > 0;
585  } else
586  decode_more = ret >= 0;
587  }
588  av_packet_unref(avpkt);
589  }
590  av_packet_unref(parsepkt);
591  }
592 maximums_reached:
593 
594  av_packet_unref(avpkt);
595 
596  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
597  avcodec_send_packet(ctx, NULL);
598 
599  do {
600  got_frame = 0;
601  av_frame_unref(frame);
602  decode_handler(ctx, frame, &got_frame, avpkt);
603 
604  nb_samples += frame->nb_samples;
605  if (nb_samples > maxsamples)
606  break;
607  } while (got_frame == 1 && it++ < maxiteration);
608 
609  fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
610 
611  av_frame_free(&frame);
612  avcodec_free_context(&ctx);
613  avcodec_free_context(&parser_avctx);
614  av_parser_close(parser);
615  av_packet_free(&avpkt);
616  av_packet_free(&parsepkt);
617  av_dict_free(&opts);
618  return 0;
619 }
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:129
AVSubtitle
Definition: avcodec.h:2238
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: packet.c:429
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:79
AVCodec
AVCodec.
Definition: codec.h:187
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h:144
AV_CODEC_ID_SANM
@ AV_CODEC_ID_SANM
Definition: codec_id.h:236
AV_CODEC_ID_LAGARITH
@ AV_CODEC_ID_LAGARITH
Definition: codec_id.h:199
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:2767
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: defs.h:51
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:449
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: defs.h:54
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:478
AV_CODEC_ID_TQI
@ AV_CODEC_ID_TQI
Definition: codec_id.h:174
AV_EF_COMPLIANT
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: defs.h:55
AVCodecParserContext::pict_type
int pict_type
Definition: avcodec.h:2756
GetByteContext
Definition: bytestream.h:33
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: codec_id.h:524
AV_CODEC_ID_SRGC
@ AV_CODEC_ID_SRGC
Definition: codec_id.h:287
AV_CODEC_ID_LOCO
@ AV_CODEC_ID_LOCO
Definition: codec_id.h:124
AV_LOG_PANIC
#define AV_LOG_PANIC
Something went really wrong and we will crash now.
Definition: log.h:196
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:601
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:168
int64_t
long long int64_t
Definition: coverity.c:34
AV_CODEC_ID_MVC2
@ AV_CODEC_ID_MVC2
Definition: codec_id.h:239
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:162
AV_RN64
#define AV_RN64(p)
Definition: intreadwrite.h:364
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:389
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: codec.h:206
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:1657
AV_CODEC_ID_MWSC
@ AV_CODEC_ID_MWSC
Definition: codec_id.h:293
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:539
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:102
data
const char data[16]
Definition: mxf.c:149
AV_CODEC_ID_CDTOONS
@ AV_CODEC_ID_CDTOONS
Definition: codec_id.h:304
FFCodec
Definition: codec_internal.h:127
c
static const FFCodec * c
Definition: target_dec_fuzzer.c:74
AV_CODEC_ID_GDV
@ AV_CODEC_ID_GDV
Definition: codec_id.h:289
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: codec_id.h:297
AV_CODEC_ID_RTV1
@ AV_CODEC_ID_RTV1
Definition: codec_id.h:326
AV_CODEC_ID_SCREENPRESSO
@ AV_CODEC_ID_SCREENPRESSO
Definition: codec_id.h:246
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: defs.h:62
AV_CODEC_ID_VB
@ AV_CODEC_ID_VB
Definition: codec_id.h:160
AVDictionary
Definition: dict.c:34
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:458
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:269
AV_CODEC_ID_MXPEG
@ AV_CODEC_ID_MXPEG
Definition: codec_id.h:198
av_strlcatf
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:103
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:490
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:594
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: packet.c:74
AV_CODEC_ID_DSICINVIDEO
@ AV_CODEC_ID_DSICINVIDEO
Definition: codec_id.h:146
AV_CODEC_ID_RSCC
@ AV_CODEC_ID_RSCC
Definition: codec_id.h:247
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:304
AVCodec::max_lowres
uint8_t max_lowres
maximum value for lowres supported by the decoder
Definition: codec.h:207
AVCodecParserContext::key_frame
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:2797
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
AV_CODEC_ID_IFF_ILBM
@ AV_CODEC_ID_IFF_ILBM
Definition: codec_id.h:188
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: codec_id.h:481
fail
#define fail()
Definition: checkasm.h:188
AV_CODEC_ID_MV30
@ AV_CODEC_ID_MV30
Definition: codec_id.h:305
AV_CODEC_ID_MSZH
@ AV_CODEC_ID_MSZH
Definition: codec_id.h:105
dummy
int dummy
Definition: motion.c:66
AV_CODEC_ID_SMACKAUDIO
@ AV_CODEC_ID_SMACKAUDIO
Definition: codec_id.h:469
AV_CODEC_ID_RKA
@ AV_CODEC_ID_RKA
Definition: codec_id.h:548
av_parser_init
AVCodecParserContext * av_parser_init(int codec_id)
Definition: parser.c:32
AV_CODEC_ID_VMIX
@ AV_CODEC_ID_VMIX
Definition: codec_id.h:327
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: codec_id.h:514
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2768
FF_CODEC_TAGS_END
#define FF_CODEC_TAGS_END
FFCodec.codec_tags termination value.
Definition: codec_internal.h:95
avsubtitle_free
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: avcodec.c:406
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:79
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:557
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1442
avcodec_decode_subtitle2
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, const AVPacket *avpkt)
Decode a subtitle message.
Definition: decode.c:983
avassert.h
AV_CODEC_CAP_EXPERIMENTAL
#define AV_CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: codec.h:102
LLVMFuzzerTestOneInput
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
Definition: target_dec_fuzzer.c:169
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: codec_id.h:271
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:530
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: packet.c:98
AV_CODEC_ID_WMAPRO
@ AV_CODEC_ID_WMAPRO
Definition: codec_id.h:483
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: codec_id.h:222
AV_CODEC_ID_NUV
@ AV_CODEC_ID_NUV
Definition: codec_id.h:136
AV_CODEC_ID_WS_VQA
@ AV_CODEC_ID_WS_VQA
Definition: codec_id.h:96
AV_CODEC_ID_ARGO
@ AV_CODEC_ID_ARGO
Definition: codec_id.h:311
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:70
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:713
AV_CODEC_ID_UTVIDEO
@ AV_CODEC_ID_UTVIDEO
Definition: codec_id.h:205
ctx
AVFormatContext * ctx
Definition: movenc.c:49
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:144
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:410
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:530
AV_CODEC_ID_VC1IMAGE
@ AV_CODEC_ID_VC1IMAGE
Definition: codec_id.h:204
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:79
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:461
AV_CODEC_ID_PNG
@ AV_CODEC_ID_PNG
Definition: codec_id.h:113
if
if(ret)
Definition: filter_design.txt:179
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:221
AV_CODEC_ID_WMV3
@ AV_CODEC_ID_WMV3
Definition: codec_id.h:123
opts
AVDictionary * opts
Definition: movenc.c:51
FUZZ_TAG
static const uint64_t FUZZ_TAG
Definition: target_dec_fuzzer.c:106
AV_CODEC_ID_EXR
@ AV_CODEC_ID_EXR
Definition: codec_id.h:234
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:522
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:527
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: codec_id.h:215
AVCodec::type
enum AVMediaType type
Definition: codec.h:200
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:1410
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: codec_id.h:484
AV_CODEC_ID_MVDV
@ AV_CODEC_ID_MVDV
Definition: codec_id.h:302
AV_CODEC_ID_CINEPAK
@ AV_CODEC_ID_CINEPAK
Definition: codec_id.h:95
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: codec_id.h:171
AV_CODEC_FLAG2_FAST
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:357
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
AV_CODEC_ID_ZLIB
@ AV_CODEC_ID_ZLIB
Definition: codec_id.h:106
AV_CODEC_ID_FMVC
@ AV_CODEC_ID_FMVC
Definition: codec_id.h:280
AV_CODEC_ID_ANM
@ AV_CODEC_ID_ANM
Definition: codec_id.h:186
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:143
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: packet.c:486
AV_EF_CRCCHECK
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data,...
Definition: defs.h:48
AV_CODEC_ID_VMDVIDEO
@ AV_CODEC_ID_VMDVIDEO
Definition: codec_id.h:104
AV_CODEC_ID_VP6A
@ AV_CODEC_ID_VP6A
Definition: codec_id.h:158
AV_CODEC_ID_VP4
@ AV_CODEC_ID_VP4
Definition: codec_id.h:300
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:491
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:68
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
avcodec_find_decoder
const AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:1011
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:486
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: codec_id.h:299
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: codec_id.h:294
AV_CODEC_ID_FFV1
@ AV_CODEC_ID_FFV1
Definition: codec_id.h:85
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:281
AVPacket::size
int size
Definition: packet.h:540
codec_internal.h
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: codec_id.h:276
cpu.h
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: codec_id.h:295
codec_list
const FFCodec * codec_list[]
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: codec_id.h:245
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:450
size
int size
Definition: twinvq_data.h:10344
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:390
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:330
AV_CODEC_ID_MSRLE
@ AV_CODEC_ID_MSRLE
Definition: codec_id.h:97
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:506
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:538
AV_CODEC_ID_QPEG
@ AV_CODEC_ID_QPEG
Definition: codec_id.h:112
AV_CODEC_ID_RV30
@ AV_CODEC_ID_RV30
Definition: codec_id.h:120
AV_CODEC_ID_MMVIDEO
@ AV_CODEC_ID_MMVIDEO
Definition: codec_id.h:132
av_packet_make_refcounted
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: packet.c:492
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:545
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: packet.c:63
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:223
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:150
AV_CODEC_ID_INDEO4
@ AV_CODEC_ID_INDEO4
Definition: codec_id.h:163
AV_CODEC_ID_MSS2
@ AV_CODEC_ID_MSS2
Definition: codec_id.h:221
AVCodec::id
enum AVCodecID id
Definition: codec.h:201
AV_CODEC_ID_HQ_HQA
@ AV_CODEC_ID_HQ_HQA
Definition: codec_id.h:242
AV_CODEC_ID_VP5
@ AV_CODEC_ID_VP5
Definition: codec_id.h:142
AV_CODEC_ID_VP3
@ AV_CODEC_ID_VP3
Definition: codec_id.h:81
AV_CODEC_ID_GIF
@ AV_CODEC_ID_GIF
Definition: codec_id.h:149
AV_CODEC_ID_TGV
@ AV_CODEC_ID_TGV
Definition: codec_id.h:172
AV_CODEC_ID_VP7
@ AV_CODEC_ID_VP7
Definition: codec_id.h:235
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:250
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:728
av_log_set_level
void av_log_set_level(int level)
Set the log level.
Definition: log.c:447
AVCodecParserContext::pos
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:2850
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:532
AV_CODEC_ID_MTS2
@ AV_CODEC_ID_MTS2
Definition: codec_id.h:219
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:529
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: codec_id.h:82
FF_DEBUG_SKIP
#define FF_DEBUG_SKIP
Definition: avcodec.h:1413
AV_CODEC_ID_PAF_VIDEO
@ AV_CODEC_ID_PAF_VIDEO
Definition: codec_id.h:233
AV_CODEC_ID_BONK
@ AV_CODEC_ID_BONK
Definition: codec_id.h:543
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:228
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_HNM4_VIDEO
@ AV_CODEC_ID_HNM4_VIDEO
Definition: codec_id.h:227
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:610
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:256
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:122
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:140
AV_CODEC_ID_BETHSOFTVID
@ AV_CODEC_ID_BETHSOFTVID
Definition: codec_id.h:155
AV_CODEC_ID_MVHA
@ AV_CODEC_ID_MVHA
Definition: codec_id.h:303
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2748
AVCodecInitialize
static const FFCodec * AVCodecInitialize(enum AVCodecID codec_id)
Definition: target_dec_fuzzer.c:75
fuzz_video_get_buffer
static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
Definition: target_dec_fuzzer.c:108
AV_CODEC_ID_SMACKVIDEO
@ AV_CODEC_ID_SMACKVIDEO
Definition: codec_id.h:135
av_buffer_allocz
AVBufferRef * av_buffer_allocz(size_t size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:93
ret
ret
Definition: filter_design.txt:187
AV_EF_AGGRESSIVE
#define AV_EF_AGGRESSIVE
consider things that a sane encoder/muxer should not do as an error
Definition: defs.h:56
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: avcodec.c:374
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_CODEC_ID_CSCD
@ AV_CODEC_ID_CSCD
Definition: codec_id.h:131
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:95
FF_DEBUG_QP
#define FF_DEBUG_QP
Definition: avcodec.h:1411
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:415
fuzz_get_buffer2
static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
Definition: target_dec_fuzzer.c:155
AV_CODEC_ID_AGM
@ AV_CODEC_ID_AGM
Definition: codec_id.h:298
AVFormatContext::debug
int debug
Flags to enable debugging.
Definition: avformat.h:1578
AVCodecContext
main external API structure.
Definition: avcodec.h:451
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:267
AV_CODEC_ID_HAP
@ AV_CODEC_ID_HAP
Definition: codec_id.h:243
AV_CODEC_ID_BINKVIDEO
@ AV_CODEC_ID_BINKVIDEO
Definition: codec_id.h:187
FFCodec::codec_tags
const uint32_t * codec_tags
List of supported codec_tags, terminated by FF_CODEC_TAGS_END.
Definition: codec_internal.h:264
AV_CODEC_ID_SIMBIOSIS_IMX
@ AV_CODEC_ID_SIMBIOSIS_IMX
Definition: codec_id.h:313
AV_CODEC_ID_MSA1
@ AV_CODEC_ID_MSA1
Definition: codec_id.h:217
AV_CODEC_ID_VMNC
@ AV_CODEC_ID_VMNC
Definition: codec_id.h:141
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:167
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
mem.h
AV_CODEC_ID_QTRLE
@ AV_CODEC_ID_QTRLE
Definition: codec_id.h:107
AV_CODEC_ID_GEM
@ AV_CODEC_ID_GEM
Definition: codec_id.h:315
AV_CODEC_EXPORT_DATA_MVS
#define AV_CODEC_EXPORT_DATA_MVS
Export motion vectors through frame side data.
Definition: avcodec.h:406
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:225
AV_CODEC_ID_TSCC
@ AV_CODEC_ID_TSCC
Definition: codec_id.h:108
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:516
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:88
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:559
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: codec_id.h:508
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:482
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:471
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: codec_id.h:466
h
h
Definition: vp9dsp_template.c:2070
AV_CODEC_ID_TARGA
@ AV_CODEC_ID_TARGA
Definition: codec_id.h:145
AV_CODEC_ID_VORBIS
@ AV_CODEC_ID_VORBIS
Definition: codec_id.h:451
AV_CODEC_ID_WMV3IMAGE
@ AV_CODEC_ID_WMV3IMAGE
Definition: codec_id.h:203
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:37
AV_CODEC_ID_FLV1
@ AV_CODEC_ID_FLV1
Definition: codec_id.h:73
AV_CODEC_ID_DFA
@ AV_CODEC_ID_DFA
Definition: codec_id.h:202
AV_CODEC_ID_AASC
@ AV_CODEC_ID_AASC
Definition: codec_id.h:126
subtitle_handler
static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused, int *got_sub_ptr, const AVPacket *avpkt)
Definition: target_dec_fuzzer.c:85
maxiteration
const uint32_t maxiteration
Definition: target_dec_fuzzer.c:104
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: codec_id.h:475
av_parser_close
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:193
AV_CODEC_ID_PRORES
@ AV_CODEC_ID_PRORES
Definition: codec_id.h:200
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