FFmpeg
target_dec_fuzzer.c
Go to the documentation of this file.
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"
57 #include "libavcodec/codec_internal.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;
74 static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
75 {
76  const AVCodec *res;
77 
78  res = avcodec_find_decoder(codec_id);
79  if (!res)
80  error("Failed to find decoder");
81  return ffcodec(res);
82 }
83 
84 static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
85  int *got_sub_ptr, const AVPacket *avpkt)
86 {
87  AVSubtitle sub;
88  int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
89  if (ret >= 0 && *got_sub_ptr)
90  avsubtitle_free(&sub);
91  return ret;
92 }
93 
94 static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame,
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 
107 static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
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:
143  av_frame_unref(frame);
144  return AVERROR(ENOMEM);
145 }
146 
147 static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
148 {
149  switch (ctx->codec_type) {
150  case AVMEDIA_TYPE_VIDEO:
151  return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
152  ? fuzz_video_get_buffer(ctx, frame)
153  : avcodec_default_get_buffer2(ctx, frame, flags);
154  case AVMEDIA_TYPE_AUDIO:
155  return avcodec_default_get_buffer2(ctx, frame, flags);
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;
179  AVDictionary *opts = NULL;
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
197  av_log_set_level(AV_LOG_PANIC);
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_APE: maxsamples /= 16384; break;
215  case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
216  case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
217  case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
218  case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
219  case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
220  case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
221  case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
222  case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
223  case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
224  case AV_CODEC_ID_CSCD: maxpixels /= 1024; break;
225  case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
226  case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
227  case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
228  case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
229  case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
230  case AV_CODEC_ID_DXA: maxpixels /= 32; break;
231  case AV_CODEC_ID_DXV: maxpixels /= 32; break;
232  case AV_CODEC_ID_EXR: maxpixels /= 1024; break;
233  case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
234  case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
235  case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
236  case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
237  case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
238  case AV_CODEC_ID_FMVC: maxpixels /= 1024; break;
239  case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
240  case AV_CODEC_ID_GEM: maxpixels /= 512; break;
241  case AV_CODEC_ID_GDV: maxpixels /= 512; break;
242  case AV_CODEC_ID_GIF: maxpixels /= 16; break;
243  case AV_CODEC_ID_H264: maxpixels /= 256; break;
244  case AV_CODEC_ID_HAP: maxpixels /= 128; break;
245  case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
246  case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
247  case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
248  case AV_CODEC_ID_IFF_ILBM: maxpixels /= 4096; break;
249  case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
250  case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
251  case AV_CODEC_ID_JPEG2000: maxpixels /= 16384; break;
252  case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
253  case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
254  case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
255  case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
256  case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
257  case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
258  case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
259  case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
260  case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
261  case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
262  case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
263  case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
264  case AV_CODEC_ID_MV30: maxpixels /= 128; break;
265  case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
266  case AV_CODEC_ID_MVHA: maxpixels /= 16384; break;
267  case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
268  case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
269  case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
270  case AV_CODEC_ID_NUV: maxpixels /= 128; break;
271  case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
272  case AV_CODEC_ID_PNG: maxpixels /= 128; break;
273  case AV_CODEC_ID_APNG: maxpixels /= 128; break;
274  case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
275  case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
276  case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
277  case AV_CODEC_ID_QPEG: maxpixels /= 256; break;
278  case AV_CODEC_ID_RKA: maxsamples /= 1<<20; break;
279  case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
280  case AV_CODEC_ID_RASC: maxpixels /= 16; break;
281  case AV_CODEC_ID_RTV1: maxpixels /= 16; break;
282  case AV_CODEC_ID_SANM: maxpixels /= 16; break;
283  case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
284  case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
285  case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
286  case AV_CODEC_ID_SPEEX: maxsamples /= 128; break;
287  case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
288  case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
289  case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
290  case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
291  case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
292  case AV_CODEC_ID_TGV: maxpixels /= 32; break;
293  case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
294  case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
295  case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
296  case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
297  case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
298  case AV_CODEC_ID_VB: maxpixels /= 1024; break;
299  case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
300  case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
301  case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
302  case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
303  case AV_CODEC_ID_VMIX: maxpixels /= 8192; break;
304  case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
305  case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
306  case AV_CODEC_ID_VP5: maxpixels /= 256; break;
307  case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
308  case AV_CODEC_ID_VP6A: maxpixels /= 4096; break;
309  case AV_CODEC_ID_VP7: maxpixels /= 256; break;
310  case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
311  case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
312  case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
313  case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
314  case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
315  case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
316  case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
317  case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
318  case AV_CODEC_ID_WMAPRO: maxsamples /= 16384; break;
319  case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
320  case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
321  case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
322  }
323 
324  maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
325  maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
326 
327  AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
328  AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
329  if (!ctx || !parser_avctx)
330  error("Failed memory allocation");
331 
332  if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
333  ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
334 
335  ctx->max_samples = maxsamples_per_frame;
336  ctx->get_buffer2 = fuzz_get_buffer2;
337  if (c->p.capabilities & AV_CODEC_CAP_EXPERIMENTAL)
338  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
339 
340  if (size > 1024) {
341  GetByteContext gbc;
342  int extradata_size;
343  int flags;
344  uint64_t request_channel_layout;
345  int64_t flags64;
346 
347  size -= 1024;
348  bytestream2_init(&gbc, data + size, 1024);
349  ctx->width = bytestream2_get_le32(&gbc);
350  ctx->height = bytestream2_get_le32(&gbc);
351  ctx->bit_rate = bytestream2_get_le64(&gbc);
352  ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
353  // Try to initialize a parser for this codec, note, this may fail which just means we test without one
354  flags = bytestream2_get_byte(&gbc);
355  if (flags & 1)
356  parser = av_parser_init(c->p.id);
357  if (flags & 2)
358  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
359  if (flags & 4) {
360  ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
361  if (flags & 8)
362  ctx->err_recognition |= AV_EF_EXPLODE;
363  }
364  if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
365  ctx->flags2 |= AV_CODEC_FLAG2_FAST;
366  if (flags & 0x80)
367  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
368 
369  if (flags & 0x40)
370  av_force_cpu_flags(0);
371 
372  extradata_size = bytestream2_get_le32(&gbc);
373 
374  ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
375  ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
376  ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
377  ctx->codec_tag = bytestream2_get_le32(&gbc);
378  if (c->codec_tags) {
379  int n;
380  for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
381  ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
382  }
383  keyframes = bytestream2_get_le64(&gbc);
384  request_channel_layout = bytestream2_get_le64(&gbc);
385 
386  ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
387  flushpattern = bytestream2_get_le64(&gbc);
388  ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
389 
390 
391  if (flags & 0x20) {
392  switch (ctx->codec_id) {
393  case AV_CODEC_ID_AC3:
394  case AV_CODEC_ID_EAC3:
395  av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
396  av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
397  av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
398  av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
399  break;
400  }
401  }
402 
403  // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
404  // remain reproducible.
405  if (request_channel_layout) {
406  switch (ctx->codec_id) {
407  case AV_CODEC_ID_AC3:
408  case AV_CODEC_ID_EAC3:
409  case AV_CODEC_ID_MLP:
410  case AV_CODEC_ID_TRUEHD:
411  case AV_CODEC_ID_DTS:
412  if (request_channel_layout & ~INT64_MIN) {
413  char *downmix_layout = av_mallocz(19);
414  if (!downmix_layout)
415  error("Failed memory allocation");
416  av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
417  av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
418  }
419  if (ctx->codec_id != AV_CODEC_ID_DTS)
420  break;
421  // fall-through
422  case AV_CODEC_ID_DOLBY_E:
423  av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
424  break;
425  }
426  }
427 
428  flags64 = bytestream2_get_le64(&gbc);
429  if (flags64 &1)
430  ctx->debug |= FF_DEBUG_SKIP;
431  if (flags64 &2)
432  ctx->debug |= FF_DEBUG_QP;
433  if (flags64 &4)
434  ctx->debug |= FF_DEBUG_MB_TYPE;
435  if (flags64 & 8)
436  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
437  if (flags64 & 0x10)
438  ctx->err_recognition |= AV_EF_CRCCHECK;
439 
440  ctx->workaround_bugs = bytestream2_get_le32(&gbc);
441 
442  if (c->p.max_lowres) {
443  ctx->lowres = bytestream2_get_byte(&gbc) % (c->p.max_lowres+1);
444  }
445 
446  if (extradata_size < size) {
447  ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
448  if (ctx->extradata) {
449  ctx->extradata_size = extradata_size;
450  size -= ctx->extradata_size;
451  memcpy(ctx->extradata, data + size, ctx->extradata_size);
452  }
453  }
454  if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
455  ctx->width = ctx->height = 0;
456  }
457 
458  int res = avcodec_open2(ctx, &c->p, &opts);
459  if (res < 0) {
460  avcodec_free_context(&ctx);
461  av_free(parser_avctx);
462  av_parser_close(parser);
463  av_dict_free(&opts);
464  return 0; // Failure of avcodec_open2() does not imply that a issue was found
465  }
466  parser_avctx->codec_id = ctx->codec_id;
467  parser_avctx->extradata_size = ctx->extradata_size;
468  parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
469 
470 
471  int got_frame;
472  AVFrame *frame = av_frame_alloc();
473  AVPacket *avpkt = av_packet_alloc();
474  AVPacket *parsepkt = av_packet_alloc();
475  if (!frame || !avpkt || !parsepkt)
476  error("Failed memory allocation");
477 
478  // Read very simple container
479  while (data < end && it < maxiteration) {
480  // Search for the TAG
481  while (data + sizeof(fuzz_tag) < end) {
482  if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
483  break;
484  data++;
485  }
486  if (data + sizeof(fuzz_tag) > end)
487  data = end;
488 
489  res = av_new_packet(parsepkt, data - last);
490  if (res < 0)
491  error("Failed memory allocation");
492  memcpy(parsepkt->data, last, data - last);
493  parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
494  keyframes = (keyframes >> 2) + (keyframes<<62);
495  data += sizeof(fuzz_tag);
496  last = data;
497 
498  while (parsepkt->size > 0) {
499  int decode_more;
500 
501  if (parser) {
502  int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
503  parsepkt->data, parsepkt->size,
504  parsepkt->pts, parsepkt->dts, parsepkt->pos);
505  if (avpkt->data == parsepkt->data) {
506  avpkt->buf = av_buffer_ref(parsepkt->buf);
507  if (!avpkt->buf)
508  error("Failed memory allocation");
509  } else {
510  if (av_packet_make_refcounted(avpkt) < 0)
511  error("Failed memory allocation");
512  }
513  parsepkt->data += ret;
514  parsepkt->size -= ret;
515  parsepkt->pos += ret;
516  avpkt->pts = parser->pts;
517  avpkt->dts = parser->dts;
518  avpkt->pos = parser->pos;
519  if ( parser->key_frame == 1 ||
520  (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
521  avpkt->flags |= AV_PKT_FLAG_KEY;
522  avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
523  } else {
524  av_packet_move_ref(avpkt, parsepkt);
525  }
526 
527  if (!(flushpattern & 7))
528  avcodec_flush_buffers(ctx);
529  flushpattern = (flushpattern >> 3) + (flushpattern << 61);
530 
531  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
532  int ret = avcodec_send_packet(ctx, avpkt);
533  decode_more = ret >= 0;
534  if(!decode_more) {
535  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
536  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
537  ctx->error_concealment = 0;
538  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
539  }
540  if (ec_pixels > maxpixels)
541  goto maximums_reached;
542  }
543  } else
544  decode_more = 1;
545 
546  // Iterate through all data
547  while (decode_more && it++ < maxiteration) {
548  av_frame_unref(frame);
549  int ret = decode_handler(ctx, frame, &got_frame, avpkt);
550 
551  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
552  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
553  ctx->error_concealment = 0;
554  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
555  }
556  if (ec_pixels > maxpixels)
557  goto maximums_reached;
558 
559  if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
560  frame->nb_samples == 0 && !got_frame &&
561  (avpkt->flags & AV_PKT_FLAG_DISCARD))
562  nb_samples += ctx->max_samples;
563 
564  nb_samples += frame->nb_samples;
565  if (nb_samples > maxsamples)
566  goto maximums_reached;
567 
568  if (ret <= 0 || ret > avpkt->size)
569  break;
570 
571  if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
572  avpkt->data += ret;
573  avpkt->size -= ret;
574  decode_more = avpkt->size > 0;
575  } else
576  decode_more = ret >= 0;
577  }
578  av_packet_unref(avpkt);
579  }
580  av_packet_unref(parsepkt);
581  }
582 maximums_reached:
583 
584  av_packet_unref(avpkt);
585 
586  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
587  avcodec_send_packet(ctx, NULL);
588 
589  do {
590  got_frame = 0;
591  av_frame_unref(frame);
592  decode_handler(ctx, frame, &got_frame, avpkt);
593 
594  nb_samples += frame->nb_samples;
595  if (nb_samples > maxsamples)
596  break;
597  } while (got_frame == 1 && it++ < maxiteration);
598 
599  fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
600 
601  av_frame_free(&frame);
602  avcodec_free_context(&ctx);
603  avcodec_free_context(&parser_avctx);
604  av_parser_close(parser);
605  av_packet_free(&avpkt);
606  av_packet_free(&parsepkt);
607  av_dict_free(&opts);
608  return 0;
609 }
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:129
AVSubtitle
Definition: avcodec.h:2227
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:427
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:75
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:234
AV_CODEC_ID_LAGARITH
@ AV_CODEC_ID_LAGARITH
Definition: codec_id.h:199
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:2726
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:443
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:472
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:2715
GetByteContext
Definition: bytestream.h:33
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: codec_id.h:518
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
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: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:584
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:237
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:130
AV_RN64
#define AV_RN64(p)
Definition: intreadwrite.h:366
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:344
AVFrame::width
int width
Definition: frame.h:416
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:1612
AV_CODEC_ID_MWSC
@ AV_CODEC_ID_MWSC
Definition: codec_id.h:289
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:522
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:102
data
const char data[16]
Definition: mxf.c:148
AV_CODEC_ID_CDTOONS
@ AV_CODEC_ID_CDTOONS
Definition: codec_id.h:300
FFCodec
Definition: codec_internal.h:127
c
static const FFCodec * c
Definition: target_dec_fuzzer.c:73
AV_CODEC_ID_GDV
@ AV_CODEC_ID_GDV
Definition: codec_id.h:285
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: codec_id.h:293
AV_CODEC_ID_RTV1
@ AV_CODEC_ID_RTV1
Definition: codec_id.h:322
AV_CODEC_ID_SCREENPRESSO
@ AV_CODEC_ID_SCREENPRESSO
Definition: codec_id.h:244
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:452
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:265
AV_CODEC_ID_MXPEG
@ AV_CODEC_ID_MXPEG
Definition: codec_id.h:198
AVFrame::buf
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:557
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:484
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:577
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
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:245
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:365
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:302
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:2756
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:475
fail
#define fail()
Definition: checkasm.h:179
AV_CODEC_ID_MV30
@ AV_CODEC_ID_MV30
Definition: codec_id.h:301
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:463
AV_CODEC_ID_RKA
@ AV_CODEC_ID_RKA
Definition: codec_id.h:542
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:323
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: codec_id.h:508
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2727
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:379
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:118
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:550
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1397
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:930
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:161
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: codec_id.h:267
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:524
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:98
AV_CODEC_ID_WMAPRO
@ AV_CODEC_ID_WMAPRO
Definition: codec_id.h:477
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: codec_id.h:220
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:307
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:681
AV_CODEC_ID_UTVIDEO
@ AV_CODEC_ID_UTVIDEO
Definition: codec_id.h:205
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:144
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:387
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:524
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
frame
static AVFrame * frame
Definition: demux_decode.c:54
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:455
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:219
AV_CODEC_ID_WMV3
@ AV_CODEC_ID_WMV3
Definition: codec_id.h:123
opts
AVDictionary * opts
Definition: movenc.c:50
FUZZ_TAG
static const uint64_t FUZZ_TAG
Definition: target_dec_fuzzer.c:105
AV_CODEC_ID_EXR
@ AV_CODEC_ID_EXR
Definition: codec_id.h:232
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:505
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:521
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: codec_id.h:213
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:1400
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: codec_id.h:478
AV_CODEC_ID_MVDV
@ AV_CODEC_ID_MVDV
Definition: codec_id.h:298
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:276
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:128
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:484
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:296
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:485
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:67
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:971
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:480
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: codec_id.h:295
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: codec_id.h:290
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:277
AVPacket::size
int size
Definition: packet.h:523
codec_internal.h
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: codec_id.h:272
cpu.h
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: codec_id.h:291
codec_list
const FFCodec * codec_list[]
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: codec_id.h:243
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:444
size
int size
Definition: twinvq_data.h:10344
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:345
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:306
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:500
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:521
AV_CODEC_ID_QPEG
@ AV_CODEC_ID_QPEG
Definition: codec_id.h:112
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: avpacket.c:490
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:528
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.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:219
AVCodec::id
enum AVCodecID id
Definition: codec.h:201
AV_CODEC_ID_HQ_HQA
@ AV_CODEC_ID_HQ_HQA
Definition: codec_id.h:240
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:233
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:254
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:675
av_log_set_level
void av_log_set_level(int level)
Set the log level.
Definition: log.c:447
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:424
AVCodecParserContext::pos
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:2809
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:515
AV_CODEC_ID_MTS2
@ AV_CODEC_ID_MTS2
Definition: codec_id.h:217
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:523
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: codec_id.h:82
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:405
FF_DEBUG_SKIP
#define FF_DEBUG_SKIP
Definition: avcodec.h:1403
AV_CODEC_ID_PAF_VIDEO
@ AV_CODEC_ID_PAF_VIDEO
Definition: codec_id.h:231
AV_CODEC_ID_BONK
@ AV_CODEC_ID_BONK
Definition: codec_id.h:537
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:226
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_HNM4_VIDEO
@ AV_CODEC_ID_HNM4_VIDEO
Definition: codec_id.h:225
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:576
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:254
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:299
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2707
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:135
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:350
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:94
FF_DEBUG_QP
#define FF_DEBUG_QP
Definition: avcodec.h:1401
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:147
AV_CODEC_ID_AGM
@ AV_CODEC_ID_AGM
Definition: codec_id.h:294
AVFormatContext::debug
int debug
Flags to enable debugging.
Definition: avformat.h:1533
AVCodecContext
main external API structure.
Definition: avcodec.h:445
AVFrame::height
int height
Definition: frame.h:416
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:263
AV_CODEC_ID_HAP
@ AV_CODEC_ID_HAP
Definition: codec_id.h:241
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:266
AV_CODEC_ID_SIMBIOSIS_IMX
@ AV_CODEC_ID_SIMBIOSIS_IMX
Definition: codec_id.h:309
AV_CODEC_ID_MSA1
@ AV_CODEC_ID_MSA1
Definition: codec_id.h:215
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
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:311
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:223
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:499
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:542
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: codec_id.h:502
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
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:389
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:465
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: codec_id.h:460
h
h
Definition: vp9dsp_template.c:2038
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:445
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
int
int
Definition: ffmpeg_filter.c:409
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:84
maxiteration
const uint32_t maxiteration
Definition: target_dec_fuzzer.c:103
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: codec_id.h:469
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
Generated on Thu Sep 26 2024 23:16:00 for FFmpeg by   doxygen 1.8.17