FFmpeg
target_dec_fuzzer.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /* Targeted fuzzer that targets specific codecs depending on two
20  compile-time flags.
21  INSTRUCTIONS:
22 
23  * Get the very fresh clang, e.g. see http://libfuzzer.info#versions
24  * Get and build libFuzzer:
25  svn co http://llvm.org/svn/llvm-project/llvm/trunk/lib/Fuzzer
26  ./Fuzzer/build.sh
27  * build ffmpeg for fuzzing:
28  FLAGS="-fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp -g" CC="clang $FLAGS" CXX="clang++ $FLAGS" ./configure --disable-x86asm
29  make clean && make -j
30  * build the fuzz target.
31  Choose the value of FFMPEG_CODEC (e.g. AV_CODEC_ID_DVD_SUBTITLE) and
32  choose one of FUZZ_FFMPEG_VIDEO, FUZZ_FFMPEG_AUDIO, FUZZ_FFMPEG_SUBTITLE.
33  clang -fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp tools/target_dec_fuzzer.c -o target_dec_fuzzer -I. -DFFMPEG_CODEC=AV_CODEC_ID_MPEG1VIDEO -DFUZZ_FFMPEG_VIDEO ../../libfuzzer/libFuzzer.a -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -Wl,--as-needed -Wl,-z,noexecstack -Wl,--warn-common -Wl,-rpath-link=:libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lxcb -lxcb-shm -lxcb -lxcb-xfixes -lxcb -lxcb-shape -lxcb -lX11 -lasound -lm -lbz2 -lz -pthread
34  * create a corpus directory and put some samples there (empty dir is ok too):
35  mkdir CORPUS && cp some-files CORPUS
36 
37  * Run fuzzing:
38  ./target_dec_fuzzer -max_len=100000 CORPUS
39 
40  More info:
41  http://libfuzzer.info
42  http://tutorial.libfuzzer.info
43  https://github.com/google/oss-fuzz
44  http://lcamtuf.coredump.cx/afl/
45  https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
46 */
47 
48 #include "config.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/avstring.h"
51 #include "libavutil/cpu.h"
52 #include "libavutil/imgutils.h"
53 #include "libavutil/intreadwrite.h"
54 
55 #include "libavcodec/avcodec.h"
56 #include "libavcodec/bytestream.h"
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, void *frame,
85  int *got_sub_ptr, 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_ARBC: maxpixels /= 1024; break;
215  case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
216  case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
217  case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
218  case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
219  case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
220  case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
221  case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
222  case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
223  case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
224  case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
225  case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
226  case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
227  case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
228  case AV_CODEC_ID_DXA: maxpixels /= 32; break;
229  case AV_CODEC_ID_DXV: maxpixels /= 32; break;
230  case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
231  case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
232  case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
233  case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
234  case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
235  case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
236  case AV_CODEC_ID_GEM: maxpixels /= 512; break;
237  case AV_CODEC_ID_GDV: maxpixels /= 512; break;
238  case AV_CODEC_ID_GIF: maxpixels /= 16; break;
239  case AV_CODEC_ID_H264: maxpixels /= 256; break;
240  case AV_CODEC_ID_HAP: maxpixels /= 128; break;
241  case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
242  case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
243  case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
244  case AV_CODEC_ID_IFF_ILBM: maxpixels /= 128; break;
245  case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
246  case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
247  case AV_CODEC_ID_JPEG2000: maxpixels /= 4096; break;
248  case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
249  case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
250  case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
251  case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
252  case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
253  case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
254  case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
255  case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
256  case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
257  case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
258  case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
259  case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
260  case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
261  case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
262  case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
263  case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
264  case AV_CODEC_ID_NUV: maxpixels /= 128; break;
265  case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
266  case AV_CODEC_ID_PNG: maxpixels /= 128; break;
267  case AV_CODEC_ID_APNG: maxpixels /= 128; break;
268  case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
269  case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
270  case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
271  case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
272  case AV_CODEC_ID_RASC: maxpixels /= 16; break;
273  case AV_CODEC_ID_SANM: maxpixels /= 16; break;
274  case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
275  case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
276  case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
277  case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
278  case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
279  case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
280  case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
281  case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
282  case AV_CODEC_ID_TGV: maxpixels /= 32; break;
283  case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
284  case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
285  case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
286  case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
287  case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
288  case AV_CODEC_ID_VB: maxpixels /= 1024; break;
289  case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
290  case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
291  case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
292  case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
293  case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
294  case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
295  case AV_CODEC_ID_VP5: maxpixels /= 256; break;
296  case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
297  case AV_CODEC_ID_VP7: maxpixels /= 256; break;
298  case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
299  case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
300  case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
301  case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
302  case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
303  case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
304  case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
305  case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
306  case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
307  case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
308  case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
309  }
310 
311  maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
312  maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
313 
314  AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
315  AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
316  if (!ctx || !parser_avctx)
317  error("Failed memory allocation");
318 
319  if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
320  ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
321 
322  ctx->max_samples = maxsamples_per_frame;
323  ctx->get_buffer2 = fuzz_get_buffer2;
324 
325  if (size > 1024) {
326  GetByteContext gbc;
327  int extradata_size;
328  int flags;
329  uint64_t request_channel_layout;
330  int64_t flags64;
331 
332  size -= 1024;
333  bytestream2_init(&gbc, data + size, 1024);
334  ctx->width = bytestream2_get_le32(&gbc);
335  ctx->height = bytestream2_get_le32(&gbc);
336  ctx->bit_rate = bytestream2_get_le64(&gbc);
337  ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
338  // Try to initialize a parser for this codec, note, this may fail which just means we test without one
339  flags = bytestream2_get_byte(&gbc);
340  if (flags & 1)
341  parser = av_parser_init(c->p.id);
342  if (flags & 2)
343  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
344  if (flags & 4) {
345  ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
346  if (flags & 8)
347  ctx->err_recognition |= AV_EF_EXPLODE;
348  }
349  if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
350  ctx->flags2 |= AV_CODEC_FLAG2_FAST;
351  if (flags & 0x80)
352  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
353 
354  if (flags & 0x40)
355  av_force_cpu_flags(0);
356 
357  extradata_size = bytestream2_get_le32(&gbc);
358 
359  ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
360  ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
361  ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
362  ctx->codec_tag = bytestream2_get_le32(&gbc);
363  if (c->codec_tags) {
364  int n;
365  for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
366  ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
367  }
368  keyframes = bytestream2_get_le64(&gbc);
369  request_channel_layout = bytestream2_get_le64(&gbc);
370 
371  ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
372  flushpattern = bytestream2_get_le64(&gbc);
373  ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
374 
375 
376  if (flags & 0x20) {
377  switch (ctx->codec_id) {
378  case AV_CODEC_ID_AC3:
379  case AV_CODEC_ID_EAC3:
380  av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
381  av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
382  av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
383  av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
384  break;
385  }
386  }
387 
388  // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
389  // remain reproducible.
390  if (request_channel_layout) {
391  switch (ctx->codec_id) {
392  case AV_CODEC_ID_AC3:
393  case AV_CODEC_ID_EAC3:
394  case AV_CODEC_ID_MLP:
395  case AV_CODEC_ID_TRUEHD:
396  case AV_CODEC_ID_DTS:
397  if (request_channel_layout & ~INT64_MIN) {
398  char *downmix_layout = av_mallocz(19);
399  if (!downmix_layout)
400  error("Failed memory allocation");
401  av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
402  av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
403  }
404  if (ctx->codec_id != AV_CODEC_ID_DTS)
405  break;
406  // fall-through
407  case AV_CODEC_ID_DOLBY_E:
408  av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
409  break;
410  }
411  }
412 
413  flags64 = bytestream2_get_le64(&gbc);
414  if (flags64 &1)
415  ctx->debug |= FF_DEBUG_SKIP;
416  if (flags64 &2)
417  ctx->debug |= FF_DEBUG_QP;
418  if (flags64 &4)
419  ctx->debug |= FF_DEBUG_MB_TYPE;
420  if (flags64 & 8)
421  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
422  if (flags64 & 0x10)
423  ctx->err_recognition |= AV_EF_CRCCHECK;
424 
425  ctx->workaround_bugs = bytestream2_get_le32(&gbc);
426 
427  if (extradata_size < size) {
428  ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
429  if (ctx->extradata) {
430  ctx->extradata_size = extradata_size;
431  size -= ctx->extradata_size;
432  memcpy(ctx->extradata, data + size, ctx->extradata_size);
433  }
434  }
435  if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
436  ctx->width = ctx->height = 0;
437  }
438 
439  int res = avcodec_open2(ctx, &c->p, &opts);
440  if (res < 0) {
441  avcodec_free_context(&ctx);
442  av_free(parser_avctx);
443  av_parser_close(parser);
444  av_dict_free(&opts);
445  return 0; // Failure of avcodec_open2() does not imply that a issue was found
446  }
447  parser_avctx->codec_id = ctx->codec_id;
448  parser_avctx->extradata_size = ctx->extradata_size;
449  parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
450 
451 
452  int got_frame;
453  AVFrame *frame = av_frame_alloc();
454  AVPacket *avpkt = av_packet_alloc();
455  AVPacket *parsepkt = av_packet_alloc();
456  if (!frame || !avpkt || !parsepkt)
457  error("Failed memory allocation");
458 
459  // Read very simple container
460  while (data < end && it < maxiteration) {
461  // Search for the TAG
462  while (data + sizeof(fuzz_tag) < end) {
463  if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
464  break;
465  data++;
466  }
467  if (data + sizeof(fuzz_tag) > end)
468  data = end;
469 
470  res = av_new_packet(parsepkt, data - last);
471  if (res < 0)
472  error("Failed memory allocation");
473  memcpy(parsepkt->data, last, data - last);
474  parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
475  keyframes = (keyframes >> 2) + (keyframes<<62);
476  data += sizeof(fuzz_tag);
477  last = data;
478 
479  while (parsepkt->size > 0) {
480  int decode_more;
481 
482  if (parser) {
483  int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
484  parsepkt->data, parsepkt->size,
485  parsepkt->pts, parsepkt->dts, parsepkt->pos);
486  if (avpkt->data == parsepkt->data) {
487  avpkt->buf = av_buffer_ref(parsepkt->buf);
488  if (!avpkt->buf)
489  error("Failed memory allocation");
490  } else {
491  if (av_packet_make_refcounted(avpkt) < 0)
492  error("Failed memory allocation");
493  }
494  parsepkt->data += ret;
495  parsepkt->size -= ret;
496  parsepkt->pos += ret;
497  avpkt->pts = parser->pts;
498  avpkt->dts = parser->dts;
499  avpkt->pos = parser->pos;
500  if ( parser->key_frame == 1 ||
501  (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
502  avpkt->flags |= AV_PKT_FLAG_KEY;
503  avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
504  } else {
505  av_packet_move_ref(avpkt, parsepkt);
506  }
507 
508  if (!(flushpattern & 7))
509  avcodec_flush_buffers(ctx);
510  flushpattern = (flushpattern >> 3) + (flushpattern << 61);
511 
512  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
513  int ret = avcodec_send_packet(ctx, avpkt);
514  decode_more = ret >= 0;
515  if(!decode_more) {
516  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
517  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
518  ctx->error_concealment = 0;
519  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
520  }
521  if (ec_pixels > maxpixels)
522  goto maximums_reached;
523  }
524  } else
525  decode_more = 1;
526 
527  // Iterate through all data
528  while (decode_more && it++ < maxiteration) {
529  av_frame_unref(frame);
530  int ret = decode_handler(ctx, frame, &got_frame, avpkt);
531 
532  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
533  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
534  ctx->error_concealment = 0;
535  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
536  }
537  if (ec_pixels > maxpixels)
538  goto maximums_reached;
539 
540  if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
541  frame->nb_samples == 0 && !got_frame &&
542  (avpkt->flags & AV_PKT_FLAG_DISCARD))
543  nb_samples += ctx->max_samples;
544 
545  nb_samples += frame->nb_samples;
546  if (nb_samples > maxsamples)
547  goto maximums_reached;
548 
549  if (ret <= 0 || ret > avpkt->size)
550  break;
551 
552  if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
553  avpkt->data += ret;
554  avpkt->size -= ret;
555  decode_more = avpkt->size > 0;
556  } else
557  decode_more = ret >= 0;
558  }
559  av_packet_unref(avpkt);
560  }
561  av_packet_unref(parsepkt);
562  }
563 maximums_reached:
564 
565  av_packet_unref(avpkt);
566 
567  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
568  avcodec_send_packet(ctx, NULL);
569 
570  do {
571  got_frame = 0;
572  av_frame_unref(frame);
573  decode_handler(ctx, frame, &got_frame, avpkt);
574 
575  nb_samples += frame->nb_samples;
576  if (nb_samples > maxsamples)
577  break;
578  } while (got_frame == 1 && it++ < maxiteration);
579 
580  fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
581 
582  av_frame_free(&frame);
583  avcodec_free_context(&ctx);
584  avcodec_free_context(&parser_avctx);
585  av_parser_close(parser);
586  av_packet_free(&avpkt);
587  av_packet_free(&parsepkt);
588  av_dict_free(&opts);
589  return 0;
590 }
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:129
AVSubtitle
Definition: avcodec.h:2371
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:422
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:75
AVCodec
AVCodec.
Definition: codec.h:204
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h: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:2881
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:441
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:470
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:2870
GetByteContext
Definition: bytestream.h:33
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: codec_id.h:516
sub
static float sub(float src0, float src1)
Definition: dnn_backend_native_layer_mathbinary.c:31
AV_CODEC_ID_LOCO
@ AV_CODEC_ID_LOCO
Definition: codec_id.h: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:436
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:168
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:116
AV_RN64
#define AV_RN64(p)
Definition: intreadwrite.h:368
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:330
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:1513
AV_CODEC_ID_MWSC
@ AV_CODEC_ID_MWSC
Definition: codec_id.h:292
avcodec_decode_subtitle2
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)
Decode a subtitle message.
Definition: decode.c:863
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:102
data
const char data[16]
Definition: mxf.c:146
AV_CODEC_ID_CDTOONS
@ AV_CODEC_ID_CDTOONS
Definition: codec_id.h:303
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:288
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: codec_id.h:296
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:32
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:450
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:268
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:104
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:482
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:73
AV_CODEC_ID_DSICINVIDEO
@ AV_CODEC_ID_DSICINVIDEO
Definition: codec_id.h:146
AV_CODEC_ID_RSCC
@ AV_CODEC_ID_RSCC
Definition: codec_id.h:245
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:312
AVCodecParserContext::key_frame
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:2911
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
fail
#define fail()
Definition: checkasm.h:134
AV_CODEC_ID_MSZH
@ AV_CODEC_ID_MSZH
Definition: codec_id.h:105
dummy
int dummy
Definition: motion.c:65
AV_CODEC_ID_SMACKAUDIO
@ AV_CODEC_ID_SMACKAUDIO
Definition: codec_id.h:461
av_parser_init
AVCodecParserContext * av_parser_init(int codec_id)
Definition: parser.c:32
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: codec_id.h:506
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2882
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:409
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:104
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:544
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1325
avassert.h
LLVMFuzzerTestOneInput
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
Definition: target_dec_fuzzer.c:161
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: codec_id.h:270
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:542
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:153
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
intreadwrite.h
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:97
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: codec_id.h: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:310
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:709
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:141
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:388
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:522
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:450
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:76
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
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:357
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:519
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: codec_id.h:213
AVCodec::type
enum AVMediaType type
Definition: codec.h:217
av_image_fill_plane_sizes
int av_image_fill_plane_sizes(size_t sizes[4], enum AVPixelFormat pix_fmt, int height, const ptrdiff_t linesizes[4])
Fill plane sizes for an image with pixel format pix_fmt and height height.
Definition: imgutils.c:111
avcodec_free_context
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
Definition: options.c:168
FF_DEBUG_MB_TYPE
#define FF_DEBUG_MB_TYPE
Definition: avcodec.h:1373
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: codec_id.h:476
AV_CODEC_ID_MVDV
@ AV_CODEC_ID_MVDV
Definition: codec_id.h:301
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:345
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AV_CODEC_ID_ZLIB
@ AV_CODEC_ID_ZLIB
Definition: codec_id.h:106
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:115
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:479
AV_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_VP4
@ AV_CODEC_ID_VP4
Definition: codec_id.h:299
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:483
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:963
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:478
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: codec_id.h:298
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: codec_id.h:293
subtitle_handler
static int subtitle_handler(AVCodecContext *avctx, void *frame, int *got_sub_ptr, AVPacket *avpkt)
Definition: target_dec_fuzzer.c:84
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:280
AVPacket::size
int size
Definition: packet.h:375
codec_internal.h
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: codec_id.h:275
cpu.h
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: codec_id.h:294
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:442
size
int size
Definition: twinvq_data.h:10344
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:331
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:325
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:498
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
AV_CODEC_ID_MMVIDEO
@ AV_CODEC_ID_MMVIDEO
Definition: codec_id.h: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:485
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:62
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c: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:218
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:282
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:607
av_log_set_level
void av_log_set_level(int level)
Set the log level.
Definition: log.c:442
AVCodecParserContext::pos
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:2964
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
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:541
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: codec_id.h:82
FF_DEBUG_SKIP
#define FF_DEBUG_SKIP
Definition: avcodec.h:1376
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:535
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:491
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h: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
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2862
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:369
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
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:1374
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:408
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:297
AVFormatContext::debug
int debug
Flags to enable debugging.
Definition: avformat.h:1488
AVCodecContext
main external API structure.
Definition: avcodec.h:440
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:266
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:312
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:314
AV_CODEC_EXPORT_DATA_MVS
#define AV_CODEC_EXPORT_DATA_MVS
Export motion vectors through frame side data.
Definition: avcodec.h:399
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:351
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:86
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: codec_id.h:500
bytestream.h
imgutils.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:463
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: codec_id.h:458
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:443
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:40
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:156
AV_CODEC_ID_AASC
@ AV_CODEC_ID_AASC
Definition: codec_id.h:126
maxiteration
const uint32_t maxiteration
Definition: target_dec_fuzzer.c:103
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: codec_id.h:467
av_parser_close
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:189
AV_CODEC_ID_PRORES
@ AV_CODEC_ID_PRORES
Definition: codec_id.h:200
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