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target_dec_fuzzer.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /* Targeted fuzzer that targets specific codecs depending on two
20  compile-time flags.
21  INSTRUCTIONS:
22 
23  * Get the very fresh clang, e.g. see http://libfuzzer.info#versions
24  * Get and build libFuzzer:
25  svn co http://llvm.org/svn/llvm-project/llvm/trunk/lib/Fuzzer
26  ./Fuzzer/build.sh
27  * build ffmpeg for fuzzing:
28  FLAGS="-fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp -g" CC="clang $FLAGS" CXX="clang++ $FLAGS" ./configure --disable-x86asm
29  make clean && make -j
30  * build the fuzz target.
31  Choose the value of FFMPEG_CODEC (e.g. AV_CODEC_ID_DVD_SUBTITLE) and
32  choose one of FUZZ_FFMPEG_VIDEO, FUZZ_FFMPEG_AUDIO, FUZZ_FFMPEG_SUBTITLE.
33  clang -fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp tools/target_dec_fuzzer.c -o target_dec_fuzzer -I. -DFFMPEG_CODEC=AV_CODEC_ID_MPEG1VIDEO -DFUZZ_FFMPEG_VIDEO ../../libfuzzer/libFuzzer.a -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -Wl,--as-needed -Wl,-z,noexecstack -Wl,--warn-common -Wl,-rpath-link=:libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lxcb -lxcb-shm -lxcb -lxcb-xfixes -lxcb -lxcb-shape -lxcb -lX11 -lasound -lm -lbz2 -lz -pthread
34  * create a corpus directory and put some samples there (empty dir is ok too):
35  mkdir CORPUS && cp some-files CORPUS
36 
37  * Run fuzzing:
38  ./target_dec_fuzzer -max_len=100000 CORPUS
39 
40  More info:
41  http://libfuzzer.info
42  http://tutorial.libfuzzer.info
43  https://github.com/google/oss-fuzz
44  http://lcamtuf.coredump.cx/afl/
45  https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
46 */
47 
48 #include "config.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/avstring.h"
51 #include "libavutil/cpu.h"
52 #include "libavutil/imgutils.h"
53 #include "libavutil/intreadwrite.h"
54 #include "libavutil/mem.h"
55 
56 #include "libavcodec/avcodec.h"
57 #include "libavcodec/bytestream.h"
58 #include "libavcodec/codec_internal.h"
59 #include "libavformat/avformat.h"
60 
61 //For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
62 #include "libavcodec/internal.h"
63 
64 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
65 
66 extern const FFCodec * codec_list[];
67 
68 static void error(const char *err)
69 {
70  fprintf(stderr, "%s", err);
71  exit(1);
72 }
73 
74 static const FFCodec *c = NULL;
75 static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
76 {
77  const AVCodec *res;
78 
79  res = avcodec_find_decoder(codec_id);
80  if (!res)
81  error("Failed to find decoder");
82  return ffcodec(res);
83 }
84 
85 static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
86  int *got_sub_ptr, const AVPacket *avpkt)
87 {
88  AVSubtitle sub;
89  int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
90  av_assert0(ret != AVERROR_BUG);
91  if (ret >= 0 && *got_sub_ptr)
92  avsubtitle_free(&sub);
93  return ret;
94 }
95 
96 static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame,
97  int *got_frame, const AVPacket *dummy)
98 {
99  int ret = avcodec_receive_frame(avctx, frame);
100  av_assert0(ret != AVERROR_BUG);
101  *got_frame = ret >= 0;
102  return ret;
103 }
104 
105 // Ensure we don't loop forever
106 const uint32_t maxiteration = 8096;
107 
108 static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
109 
110 static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
111 {
112  ptrdiff_t linesize1[4];
113  size_t size[4];
114  int linesize_align[AV_NUM_DATA_POINTERS];
115  int i, ret, w = frame->width, h = frame->height;
116 
117  avcodec_align_dimensions2(ctx, &w, &h, linesize_align);
118  ret = av_image_fill_linesizes(frame->linesize, ctx->pix_fmt, w);
119  if (ret < 0)
120  return ret;
121 
122  for (i = 0; i < 4 && frame->linesize[i]; i++)
123  linesize1[i] = frame->linesize[i] =
124  FFALIGN(frame->linesize[i], linesize_align[i]);
125  for (; i < 4; i++)
126  linesize1[i] = 0;
127 
128  ret = av_image_fill_plane_sizes(size, ctx->pix_fmt, h, linesize1);
129  if (ret < 0)
130  return ret;
131 
132  frame->extended_data = frame->data;
133  for (i = 0; i < 4 && size[i]; i++) {
134  switch(ctx->codec_id) {
135  case AV_CODEC_ID_FFV1:
136  frame->buf[i] = av_buffer_alloc(size[i]);
137  break;
138  default:
139  frame->buf[i] = av_buffer_allocz(size[i]);
140  }
141 
142  if (!frame->buf[i])
143  goto fail;
144  frame->data[i] = frame->buf[i]->data;
145  }
146  for (; i < AV_NUM_DATA_POINTERS; i++) {
147  frame->data[i] = NULL;
148  frame->linesize[i] = 0;
149  }
150 
151  return 0;
152 fail:
153  av_frame_unref(frame);
154  return AVERROR(ENOMEM);
155 }
156 
157 static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
158 {
159  switch (ctx->codec_type) {
160  case AVMEDIA_TYPE_VIDEO:
161  return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
162  ? fuzz_video_get_buffer(ctx, frame)
163  : avcodec_default_get_buffer2(ctx, frame, flags);
164  case AVMEDIA_TYPE_AUDIO:
165  return avcodec_default_get_buffer2(ctx, frame, flags);
166  default:
167  return AVERROR(EINVAL);
168  }
169 }
170 
171 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
172  uint64_t maxpixels_per_frame = 4096 * 4096;
173  uint64_t maxpixels;
174 
175  uint64_t maxsamples_per_frame = 256*1024*32;
176  uint64_t maxsamples;
177  const uint64_t fuzz_tag = FUZZ_TAG;
178  const uint8_t *last = data;
179  const uint8_t *end = data + size;
180  uint32_t it = 0;
181  uint64_t ec_pixels = 0;
182  uint64_t nb_samples = 0;
183  int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
184  int *got_picture_ptr,
185  const AVPacket *avpkt) = NULL;
186  AVCodecParserContext *parser = NULL;
187  uint64_t keyframes = 0;
188  uint64_t flushpattern = -1;
189  AVDictionary *opts = NULL;
190 
191  if (!c) {
192 #ifdef FFMPEG_DECODER
193 #define DECODER_SYMBOL0(CODEC) ff_##CODEC##_decoder
194 #define DECODER_SYMBOL(CODEC) DECODER_SYMBOL0(CODEC)
195  extern FFCodec DECODER_SYMBOL(FFMPEG_DECODER);
196  codec_list[0] = &DECODER_SYMBOL(FFMPEG_DECODER);
197 
198  c = &DECODER_SYMBOL(FFMPEG_DECODER);
199 #else
200  c = AVCodecInitialize(FFMPEG_CODEC); // Done once.
201 #endif
202  av_log_set_level(AV_LOG_PANIC);
203  }
204 
205  switch (c->p.type) {
206  case AVMEDIA_TYPE_AUDIO :
207  case AVMEDIA_TYPE_VIDEO : decode_handler = audio_video_handler ; break;
208  case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler ; break;
209  }
210  switch (c->p.id) {
211  case AV_CODEC_ID_APE: maxsamples_per_frame /= 256; break;
212  }
213  maxpixels = maxpixels_per_frame * maxiteration;
214  maxsamples = maxsamples_per_frame * maxiteration;
215  switch (c->p.id) {
216  case AV_CODEC_ID_AASC: maxpixels /= 1024; break;
217  case AV_CODEC_ID_AGM: maxpixels /= 1024; break;
218  case AV_CODEC_ID_ANM: maxpixels /= 1024; break;
219  case AV_CODEC_ID_APE: maxsamples /= 16384; break;
220  case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
221  case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
222  case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
223  case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
224  case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
225  case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
226  case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
227  case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
228  case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
229  case AV_CODEC_ID_CSCD: maxpixels /= 1024; break;
230  case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
231  case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
232  case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
233  case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
234  case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
235  case AV_CODEC_ID_DXA: maxpixels /= 32; break;
236  case AV_CODEC_ID_DXV: maxpixels /= 32; break;
237  case AV_CODEC_ID_CMV: maxpixels /= 256; break;
238  case AV_CODEC_ID_EXR: maxpixels /= 1024; break;
239  case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
240  case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
241  case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
242  case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
243  case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
244  case AV_CODEC_ID_FMVC: maxpixels /= 1024; break;
245  case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
246  case AV_CODEC_ID_GEM: maxpixels /= 512; break;
247  case AV_CODEC_ID_GDV: maxpixels /= 512; break;
248  case AV_CODEC_ID_GIF: maxpixels /= 16; break;
249  case AV_CODEC_ID_H264: maxpixels /= 256; break;
250  case AV_CODEC_ID_HAP: maxpixels /= 128; break;
251  case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
252  case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
253  case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
254  case AV_CODEC_ID_IFF_ILBM: maxpixels /= 4096; break;
255  case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
256  case AV_CODEC_ID_INDEO5: maxpixels /= 1024; break;
257  case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
258  case AV_CODEC_ID_JPEG2000: maxpixels /= 16384; break;
259  case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
260  case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
261  case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
262  case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
263  case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
264  case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
265  case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
266  case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
267  case AV_CODEC_ID_MSCC: maxpixels /= 4096; break;
268  case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
269  case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
270  case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
271  case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
272  case AV_CODEC_ID_MV30: maxpixels /= 128; break;
273  case AV_CODEC_ID_MVC1: maxpixels /= 1024; break;
274  case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
275  case AV_CODEC_ID_MVHA: maxpixels /= 16384; break;
276  case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
277  case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
278  case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
279  case AV_CODEC_ID_NUV: maxpixels /= 128; break;
280  case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
281  case AV_CODEC_ID_PNG: maxpixels /= 128; break;
282  case AV_CODEC_ID_APNG: maxpixels /= 128; break;
283  case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
284  case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
285  case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
286  case AV_CODEC_ID_QPEG: maxpixels /= 256; break;
287  case AV_CODEC_ID_RKA: maxsamples /= 1<<20; break;
288  case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
289  case AV_CODEC_ID_RASC: maxpixels /= 256; break;
290  case AV_CODEC_ID_RTV1: maxpixels /= 16; break;
291  case AV_CODEC_ID_RV30: maxpixels /= 256; break;
292  case AV_CODEC_ID_SANM: maxpixels /= 16; break;
293  case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
294  case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
295  case AV_CODEC_ID_SGA_VIDEO: maxpixels /= 256; break;
296  case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
297  case AV_CODEC_ID_SPEEX: maxsamples /= 128; break;
298  case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
299  case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
300  case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
301  case AV_CODEC_ID_SRGC: maxpixels /= 128; break;
302  case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
303  case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
304  case AV_CODEC_ID_TDSC: maxpixels /= 128; break;
305  case AV_CODEC_ID_TGV: maxpixels /= 32; break;
306  case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
307  case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
308  case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
309  case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
310  case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
311  case AV_CODEC_ID_VB: maxpixels /= 1024; break;
312  case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
313  case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
314  case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
315  case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
316  case AV_CODEC_ID_VMIX: maxpixels /= 8192; break;
317  case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
318  case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
319  case AV_CODEC_ID_VP5: maxpixels /= 256; break;
320  case AV_CODEC_ID_VP6: maxpixels /= 4096; break;
321  case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
322  case AV_CODEC_ID_VP6A: maxpixels /= 4096; break;
323  case AV_CODEC_ID_VP7: maxpixels /= 256; break;
324  case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
325  case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
326  case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
327  case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
328  case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
329  case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
330  case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
331  case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
332  case AV_CODEC_ID_WMAPRO: maxsamples /= 16384; break;
333  case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
334  case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
335  case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
336  }
337 
338  maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
339  maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
340 
341  AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
342  AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
343  if (!ctx || !parser_avctx)
344  error("Failed memory allocation");
345 
346  if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
347  ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
348 
349  ctx->max_samples = maxsamples_per_frame;
350  ctx->get_buffer2 = fuzz_get_buffer2;
351  if (c->p.capabilities & AV_CODEC_CAP_EXPERIMENTAL)
352  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
353 
354  if (size > 1024) {
355  GetByteContext gbc;
356  int extradata_size;
357  int flags;
358  uint64_t request_channel_layout;
359  int64_t flags64;
360 
361  size -= 1024;
362  bytestream2_init(&gbc, data + size, 1024);
363  ctx->width = bytestream2_get_le32(&gbc);
364  ctx->height = bytestream2_get_le32(&gbc);
365  ctx->bit_rate = bytestream2_get_le64(&gbc);
366  ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
367  // Try to initialize a parser for this codec, note, this may fail which just means we test without one
368  flags = bytestream2_get_byte(&gbc);
369  if (flags & 1)
370  parser = av_parser_init(c->p.id);
371  if (flags & 2)
372  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
373  if (flags & 4) {
374  ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
375  if (flags & 8)
376  ctx->err_recognition |= AV_EF_EXPLODE;
377  }
378  if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
379  ctx->flags2 |= AV_CODEC_FLAG2_FAST;
380  if (flags & 0x80)
381  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
382 
383  if (flags & 0x40)
384  av_force_cpu_flags(0);
385 
386  extradata_size = bytestream2_get_le32(&gbc);
387 
388  ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
389  ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
390  ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
391  ctx->codec_tag = bytestream2_get_le32(&gbc);
392  if (c->codec_tags) {
393  int n;
394  for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
395  ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
396  }
397  keyframes = bytestream2_get_le64(&gbc);
398  request_channel_layout = bytestream2_get_le64(&gbc);
399 
400  ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
401  flushpattern = bytestream2_get_le64(&gbc);
402  ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
403 
404 
405  if (flags & 0x20) {
406  switch (ctx->codec_id) {
407  case AV_CODEC_ID_AC3:
408  case AV_CODEC_ID_EAC3:
409  av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
410  av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
411  av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
412  av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
413  break;
414  }
415  }
416 
417  // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
418  // remain reproducible.
419  if (request_channel_layout) {
420  switch (ctx->codec_id) {
421  case AV_CODEC_ID_AC3:
422  case AV_CODEC_ID_EAC3:
423  case AV_CODEC_ID_MLP:
424  case AV_CODEC_ID_TRUEHD:
425  case AV_CODEC_ID_DTS:
426  if (request_channel_layout & ~INT64_MIN) {
427  char *downmix_layout = av_mallocz(19);
428  if (!downmix_layout)
429  error("Failed memory allocation");
430  av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
431  av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
432  }
433  if (ctx->codec_id != AV_CODEC_ID_DTS)
434  break;
435  // fall-through
436  case AV_CODEC_ID_DOLBY_E:
437  av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
438  break;
439  }
440  }
441 
442  flags64 = bytestream2_get_le64(&gbc);
443  if (flags64 &1)
444  ctx->debug |= FF_DEBUG_SKIP;
445  if (flags64 &2)
446  ctx->debug |= FF_DEBUG_QP;
447  if (flags64 &4)
448  ctx->debug |= FF_DEBUG_MB_TYPE;
449  if (flags64 & 8)
450  ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
451  if (flags64 & 0x10)
452  ctx->err_recognition |= AV_EF_CRCCHECK;
453 
454  ctx->workaround_bugs = bytestream2_get_le32(&gbc);
455 
456  if (c->p.max_lowres) {
457  ctx->lowres = bytestream2_get_byte(&gbc) % (c->p.max_lowres+1);
458  }
459 
460  if (extradata_size < size) {
461  ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
462  if (ctx->extradata) {
463  ctx->extradata_size = extradata_size;
464  size -= ctx->extradata_size;
465  memcpy(ctx->extradata, data + size, ctx->extradata_size);
466  }
467  }
468  if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
469  ctx->width = ctx->height = 0;
470  }
471 
472  int res = avcodec_open2(ctx, &c->p, &opts);
473  if (res < 0) {
474  av_assert0(res != AVERROR_BUG);
475  avcodec_free_context(&ctx);
476  av_free(parser_avctx);
477  av_parser_close(parser);
478  av_dict_free(&opts);
479  return 0; // Failure of avcodec_open2() does not imply that a issue was found
480  }
481  parser_avctx->codec_id = ctx->codec_id;
482  parser_avctx->extradata_size = ctx->extradata_size;
483  parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
484 
485 
486  int got_frame;
487  AVFrame *frame = av_frame_alloc();
488  AVPacket *avpkt = av_packet_alloc();
489  AVPacket *parsepkt = av_packet_alloc();
490  if (!frame || !avpkt || !parsepkt)
491  error("Failed memory allocation");
492 
493  // Read very simple container
494  while (data < end && it < maxiteration) {
495  // Search for the TAG
496  while (data + sizeof(fuzz_tag) < end) {
497  if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
498  break;
499  data++;
500  }
501  if (data + sizeof(fuzz_tag) > end)
502  data = end;
503 
504  res = av_new_packet(parsepkt, data - last);
505  if (res < 0)
506  error("Failed memory allocation");
507  memcpy(parsepkt->data, last, data - last);
508  parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
509  keyframes = (keyframes >> 2) + (keyframes<<62);
510  data += sizeof(fuzz_tag);
511  last = data;
512 
513  while (parsepkt->size > 0) {
514  int decode_more;
515 
516  if (parser) {
517  int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
518  parsepkt->data, parsepkt->size,
519  parsepkt->pts, parsepkt->dts, parsepkt->pos);
520  if (avpkt->data == parsepkt->data) {
521  avpkt->buf = av_buffer_ref(parsepkt->buf);
522  if (!avpkt->buf)
523  error("Failed memory allocation");
524  } else {
525  if (av_packet_make_refcounted(avpkt) < 0)
526  error("Failed memory allocation");
527  }
528  parsepkt->data += ret;
529  parsepkt->size -= ret;
530  parsepkt->pos += ret;
531  avpkt->pts = parser->pts;
532  avpkt->dts = parser->dts;
533  avpkt->pos = parser->pos;
534  if ( parser->key_frame == 1 ||
535  (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
536  avpkt->flags |= AV_PKT_FLAG_KEY;
537  avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
538  } else {
539  av_packet_move_ref(avpkt, parsepkt);
540  }
541 
542  if (!(flushpattern & 7))
543  avcodec_flush_buffers(ctx);
544  flushpattern = (flushpattern >> 3) + (flushpattern << 61);
545 
546  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
547  int ret = avcodec_send_packet(ctx, avpkt);
548  av_assert0(ret != AVERROR_BUG);
549  decode_more = ret >= 0;
550  if(!decode_more) {
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  } else
560  decode_more = 1;
561 
562  // Iterate through all data
563  while (decode_more && it++ < maxiteration) {
564  av_frame_unref(frame);
565  int ret = decode_handler(ctx, frame, &got_frame, avpkt);
566 
567  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
568  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
569  ctx->error_concealment = 0;
570  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
571  }
572  if (ec_pixels > maxpixels)
573  goto maximums_reached;
574 
575  if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
576  frame->nb_samples == 0 && !got_frame &&
577  (avpkt->flags & AV_PKT_FLAG_DISCARD))
578  nb_samples += ctx->max_samples;
579 
580  nb_samples += frame->nb_samples;
581  if (nb_samples > maxsamples)
582  goto maximums_reached;
583 
584  if (ret <= 0 || ret > avpkt->size)
585  break;
586 
587  if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
588  avpkt->data += ret;
589  avpkt->size -= ret;
590  decode_more = avpkt->size > 0;
591  } else
592  decode_more = ret >= 0;
593  }
594  av_packet_unref(avpkt);
595  }
596  av_packet_unref(parsepkt);
597  }
598 maximums_reached:
599 
600  av_packet_unref(avpkt);
601 
602  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
603  int ret = avcodec_send_packet(ctx, NULL);
604  av_assert0(ret != AVERROR_BUG);
605  }
606 
607  do {
608  got_frame = 0;
609  av_frame_unref(frame);
610  decode_handler(ctx, frame, &got_frame, avpkt);
611 
612  nb_samples += frame->nb_samples;
613  if (nb_samples > maxsamples)
614  break;
615  } while (got_frame == 1 && it++ < maxiteration);
616 
617  fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
618 
619  av_frame_free(&frame);
620  avcodec_free_context(&ctx);
621  avcodec_free_context(&parser_avctx);
622  av_parser_close(parser);
623  av_packet_free(&avpkt);
624  av_packet_free(&parsepkt);
625  av_dict_free(&opts);
626  return 0;
627 }
flags
const SwsFlags flags[]
Definition: swscale.c:61
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:129
AVSubtitle
Definition: avcodec.h:2075
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: packet.c:430
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:81
AVCodec
AVCodec.
Definition: codec.h:172
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_MSCC
@ AV_CODEC_ID_MSCC
Definition: codec_id.h:286
AV_CODEC_ID_SANM
@ AV_CODEC_ID_SANM
Definition: codec_id.h:236
AV_CODEC_ID_LAGARITH
@ AV_CODEC_ID_LAGARITH
Definition: codec_id.h:199
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:2586
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: defs.h:51
AV_CODEC_ID_INDEO5
@ AV_CODEC_ID_INDEO5
Definition: codec_id.h:164
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:452
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:481
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:2575
GetByteContext
Definition: bytestream.h:33
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: codec_id.h:527
AV_CODEC_ID_SRGC
@ AV_CODEC_ID_SRGC
Definition: codec_id.h:287
AV_CODEC_ID_LOCO
@ AV_CODEC_ID_LOCO
Definition: codec_id.h:124
AV_LOG_PANIC
#define AV_LOG_PANIC
Something went really wrong and we will crash now.
Definition: log.h:197
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:597
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:168
int64_t
long long int64_t
Definition: coverity.c:34
AV_CODEC_ID_MVC2
@ AV_CODEC_ID_MVC2
Definition: codec_id.h:239
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:63
AV_RN64
#define AV_RN64(p)
Definition: intreadwrite.h:364
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:410
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: codec.h:191
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:1619
AV_CODEC_ID_MWSC
@ AV_CODEC_ID_MWSC
Definition: codec_id.h:293
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:535
AV_CODEC_ID_VP6
@ AV_CODEC_ID_VP6
Definition: codec_id.h:143
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:102
data
const char data[16]
Definition: mxf.c:149
AV_CODEC_ID_CDTOONS
@ AV_CODEC_ID_CDTOONS
Definition: codec_id.h:304
FFCodec
Definition: codec_internal.h:127
c
static const FFCodec * c
Definition: target_dec_fuzzer.c:74
AV_CODEC_ID_GDV
@ AV_CODEC_ID_GDV
Definition: codec_id.h:289
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: codec_id.h:297
AV_CODEC_ID_RTV1
@ AV_CODEC_ID_RTV1
Definition: codec_id.h:326
AV_CODEC_ID_SCREENPRESSO
@ AV_CODEC_ID_SCREENPRESSO
Definition: codec_id.h:246
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: defs.h:62
AV_CODEC_ID_VB
@ AV_CODEC_ID_VB
Definition: codec_id.h:160
AVDictionary
Definition: dict.c:32
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:461
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
AV_CODEC_ID_APNG
@ AV_CODEC_ID_APNG
Definition: codec_id.h:269
AV_CODEC_ID_MXPEG
@ AV_CODEC_ID_MXPEG
Definition: codec_id.h:198
av_strlcatf
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:103
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:493
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:590
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: packet.c:75
AV_CODEC_ID_DSICINVIDEO
@ AV_CODEC_ID_DSICINVIDEO
Definition: codec_id.h:146
AV_CODEC_ID_RSCC
@ AV_CODEC_ID_RSCC
Definition: codec_id.h:247
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:304
AVCodec::max_lowres
uint8_t max_lowres
maximum value for lowres supported by the decoder
Definition: codec.h:192
AVCodecParserContext::key_frame
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:2616
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:484
fail
#define fail()
Definition: checkasm.h:195
AV_CODEC_ID_MV30
@ AV_CODEC_ID_MV30
Definition: codec_id.h:305
AV_CODEC_ID_MSZH
@ AV_CODEC_ID_MSZH
Definition: codec_id.h:105
dummy
int dummy
Definition: motion.c:66
AV_CODEC_ID_SMACKAUDIO
@ AV_CODEC_ID_SMACKAUDIO
Definition: codec_id.h:472
AV_CODEC_ID_RKA
@ AV_CODEC_ID_RKA
Definition: codec_id.h:551
av_parser_init
AVCodecParserContext * av_parser_init(int codec_id)
Definition: parser.c:32
AV_CODEC_ID_VMIX
@ AV_CODEC_ID_VMIX
Definition: codec_id.h:327
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: codec_id.h:517
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2587
FF_CODEC_TAGS_END
#define FF_CODEC_TAGS_END
FFCodec.codec_tags termination value.
Definition: codec_internal.h:94
avsubtitle_free
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: avcodec.c:406
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:79
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:51
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:560
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1407
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:909
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:87
LLVMFuzzerTestOneInput
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
Definition: target_dec_fuzzer.c:171
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: codec_id.h:271
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:515
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:149
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
intreadwrite.h
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: packet.c:99
AV_CODEC_ID_WMAPRO
@ AV_CODEC_ID_WMAPRO
Definition: codec_id.h:486
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: codec_id.h:222
AV_CODEC_ID_NUV
@ AV_CODEC_ID_NUV
Definition: codec_id.h:136
AV_CODEC_ID_SGA_VIDEO
@ AV_CODEC_ID_SGA_VIDEO
Definition: codec_id.h:314
AV_CODEC_ID_WS_VQA
@ AV_CODEC_ID_WS_VQA
Definition: codec_id.h:96
AV_CODEC_ID_ARGO
@ AV_CODEC_ID_ARGO
Definition: codec_id.h:311
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:70
avcodec_receive_frame
int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder or encoder (when the AV_CODEC_FLAG_RECON_FRAME flag is used...
Definition: avcodec.c:702
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
AV_CODEC_ID_UTVIDEO
@ AV_CODEC_ID_UTVIDEO
Definition: codec_id.h:205
ctx
AVFormatContext * ctx
Definition: movenc.c:49
avcodec_align_dimensions2
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
Definition: utils.c:141
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:410
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:533
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:441
AV_CODEC_ID_PNG
@ AV_CODEC_ID_PNG
Definition: codec_id.h:113
if
if(ret)
Definition: filter_design.txt:179
AV_CODEC_ID_TDSC
@ AV_CODEC_ID_TDSC
Definition: codec_id.h:241
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:221
AV_CODEC_ID_WMV3
@ AV_CODEC_ID_WMV3
Definition: codec_id.h:123
opts
AVDictionary * opts
Definition: movenc.c:51
FUZZ_TAG
static const uint64_t FUZZ_TAG
Definition: target_dec_fuzzer.c:108
AV_CODEC_ID_EXR
@ AV_CODEC_ID_EXR
Definition: codec_id.h:234
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:518
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:530
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: codec_id.h:215
AVCodec::type
enum AVMediaType type
Definition: codec.h:185
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:1378
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: codec_id.h:487
AV_CODEC_ID_MVDV
@ AV_CODEC_ID_MVDV
Definition: codec_id.h:302
AV_CODEC_ID_CINEPAK
@ AV_CODEC_ID_CINEPAK
Definition: codec_id.h:95
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: codec_id.h:171
AV_CODEC_FLAG2_FAST
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:337
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
AV_CODEC_ID_ZLIB
@ AV_CODEC_ID_ZLIB
Definition: codec_id.h:106
AV_CODEC_ID_FMVC
@ AV_CODEC_ID_FMVC
Definition: codec_id.h:280
AV_CODEC_ID_ANM
@ AV_CODEC_ID_ANM
Definition: codec_id.h:186
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:143
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: packet.c:487
AV_EF_CRCCHECK
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data,...
Definition: defs.h:48
AV_CODEC_ID_VMDVIDEO
@ AV_CODEC_ID_VMDVIDEO
Definition: codec_id.h:104
AV_CODEC_ID_VP6A
@ AV_CODEC_ID_VP6A
Definition: codec_id.h:158
AV_CODEC_ID_VP4
@ AV_CODEC_ID_VP4
Definition: codec_id.h:300
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:494
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:68
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
avcodec_find_decoder
const AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:1017
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:489
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: codec_id.h:299
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: codec_id.h:294
AV_CODEC_ID_FFV1
@ AV_CODEC_ID_FFV1
Definition: codec_id.h:85
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AV_CODEC_ID_SCPR
@ AV_CODEC_ID_SCPR
Definition: codec_id.h:281
AVPacket::size
int size
Definition: packet.h:536
codec_internal.h
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: codec_id.h:276
cpu.h
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: codec_id.h:295
codec_list
const FFCodec * codec_list[]
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: codec_id.h:245
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:453
size
int size
Definition: twinvq_data.h:10344
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:411
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:284
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:509
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:534
AV_CODEC_ID_QPEG
@ AV_CODEC_ID_QPEG
Definition: codec_id.h:112
AV_CODEC_ID_RV30
@ AV_CODEC_ID_RV30
Definition: codec_id.h:120
AV_CODEC_ID_MMVIDEO
@ AV_CODEC_ID_MMVIDEO
Definition: codec_id.h:132
av_packet_make_refcounted
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: packet.c:493
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:541
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: packet.c:64
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:233
av_buffer_alloc
AVBufferRef * av_buffer_alloc(size_t size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:77
AV_CODEC_ID_DXA
@ AV_CODEC_ID_DXA
Definition: codec_id.h:150
AV_CODEC_ID_INDEO4
@ AV_CODEC_ID_INDEO4
Definition: codec_id.h:163
AV_CODEC_ID_MSS2
@ AV_CODEC_ID_MSS2
Definition: codec_id.h:221
AVCodec::id
enum AVCodecID id
Definition: codec.h:186
AV_CODEC_ID_HQ_HQA
@ AV_CODEC_ID_HQ_HQA
Definition: codec_id.h:242
AV_CODEC_ID_VP5
@ AV_CODEC_ID_VP5
Definition: codec_id.h:142
AV_CODEC_ID_VP3
@ AV_CODEC_ID_VP3
Definition: codec_id.h:81
AV_CODEC_ID_GIF
@ AV_CODEC_ID_GIF
Definition: codec_id.h:149
AV_CODEC_ID_TGV
@ AV_CODEC_ID_TGV
Definition: codec_id.h:172
AV_CODEC_ID_VP7
@ AV_CODEC_ID_VP7
Definition: codec_id.h:235
avcodec_default_get_buffer2
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: get_buffer.c:253
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:704
av_log_set_level
void av_log_set_level(int level)
Set the log level.
Definition: log.c:474
AVCodecParserContext::pos
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:2669
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:528
AV_CODEC_ID_MTS2
@ AV_CODEC_ID_MTS2
Definition: codec_id.h:219
AVCodecContext::extradata
uint8_t * extradata
Out-of-band global headers that may be used by some codecs.
Definition: avcodec.h:514
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: codec_id.h:82
FF_DEBUG_SKIP
#define FF_DEBUG_SKIP
Definition: avcodec.h:1381
AV_CODEC_ID_PAF_VIDEO
@ AV_CODEC_ID_PAF_VIDEO
Definition: codec_id.h:233
AV_CODEC_ID_BONK
@ AV_CODEC_ID_BONK
Definition: codec_id.h:546
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:228
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_HNM4_VIDEO
@ AV_CODEC_ID_HNM4_VIDEO
Definition: codec_id.h:227
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:498
AV_CODEC_ID_CMV
@ AV_CODEC_ID_CMV
Definition: codec_id.h:170
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:256
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:122
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:140
AV_CODEC_ID_BETHSOFTVID
@ AV_CODEC_ID_BETHSOFTVID
Definition: codec_id.h:155
AV_CODEC_ID_MVHA
@ AV_CODEC_ID_MVHA
Definition: codec_id.h:303
AV_CODEC_ID_MVC1
@ AV_CODEC_ID_MVC1
Definition: codec_id.h:238
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2567
AVCodecInitialize
static const FFCodec * AVCodecInitialize(enum AVCodecID codec_id)
Definition: target_dec_fuzzer.c:75
fuzz_video_get_buffer
static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
Definition: target_dec_fuzzer.c:110
AV_CODEC_ID_SMACKVIDEO
@ AV_CODEC_ID_SMACKVIDEO
Definition: codec_id.h:135
av_buffer_allocz
AVBufferRef * av_buffer_allocz(size_t size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:93
ret
ret
Definition: filter_design.txt:187
AV_EF_AGGRESSIVE
#define AV_EF_AGGRESSIVE
consider things that a sane encoder/muxer should not do as an error
Definition: defs.h:56
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: avcodec.c:374
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AV_CODEC_ID_CSCD
@ AV_CODEC_ID_CSCD
Definition: codec_id.h:131
avformat.h
audio_video_handler
static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame, int *got_frame, const AVPacket *dummy)
Definition: target_dec_fuzzer.c:96
FF_DEBUG_QP
#define FF_DEBUG_QP
Definition: avcodec.h:1379
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:395
fuzz_get_buffer2
static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
Definition: target_dec_fuzzer.c:157
AV_CODEC_ID_AGM
@ AV_CODEC_ID_AGM
Definition: codec_id.h:298
AVFormatContext::debug
int debug
Flags to enable debugging.
Definition: avformat.h:1540
AVCodecContext
main external API structure.
Definition: avcodec.h:431
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:267
AV_CODEC_ID_HAP
@ AV_CODEC_ID_HAP
Definition: codec_id.h:243
AV_CODEC_ID_BINKVIDEO
@ AV_CODEC_ID_BINKVIDEO
Definition: codec_id.h:187
FFCodec::codec_tags
const uint32_t * codec_tags
List of supported codec_tags, terminated by FF_CODEC_TAGS_END.
Definition: codec_internal.h:269
AV_CODEC_ID_SIMBIOSIS_IMX
@ AV_CODEC_ID_SIMBIOSIS_IMX
Definition: codec_id.h:313
AV_CODEC_ID_MSA1
@ AV_CODEC_ID_MSA1
Definition: codec_id.h:217
AV_CODEC_ID_VMNC
@ AV_CODEC_ID_VMNC
Definition: codec_id.h:141
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set() that converts the value to a string and stores it.
Definition: dict.c:177
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_parser_parse2
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
Definition: parser.c:115
mem.h
AV_CODEC_ID_QTRLE
@ AV_CODEC_ID_QTRLE
Definition: codec_id.h:107
AV_CODEC_ID_GEM
@ AV_CODEC_ID_GEM
Definition: codec_id.h:315
AV_CODEC_EXPORT_DATA_MVS
#define AV_CODEC_EXPORT_DATA_MVS
Export motion vectors through frame side data.
Definition: avcodec.h:386
it
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s it
Definition: writing_filters.txt:31
AV_CODEC_ID_G2M
@ AV_CODEC_ID_G2M
Definition: codec_id.h:225
AV_CODEC_ID_TSCC
@ AV_CODEC_ID_TSCC
Definition: codec_id.h:108
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:512
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:555
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: codec_id.h:511
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
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:474
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: codec_id.h:469
h
h
Definition: vp9dsp_template.c:2070
AV_CODEC_ID_TARGA
@ AV_CODEC_ID_TARGA
Definition: codec_id.h:145
AV_CODEC_ID_VORBIS
@ AV_CODEC_ID_VORBIS
Definition: codec_id.h:454
AV_CODEC_ID_WMV3IMAGE
@ AV_CODEC_ID_WMV3IMAGE
Definition: codec_id.h:203
avstring.h
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:318
FF_SANE_NB_CHANNELS
#define FF_SANE_NB_CHANNELS
Definition: internal.h:37
AV_CODEC_ID_FLV1
@ AV_CODEC_ID_FLV1
Definition: codec_id.h:73
AV_CODEC_ID_DFA
@ AV_CODEC_ID_DFA
Definition: codec_id.h:202
AV_CODEC_ID_AASC
@ AV_CODEC_ID_AASC
Definition: codec_id.h:126
subtitle_handler
static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused, int *got_sub_ptr, const AVPacket *avpkt)
Definition: target_dec_fuzzer.c:85
maxiteration
const uint32_t maxiteration
Definition: target_dec_fuzzer.c:106
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: codec_id.h:478
av_parser_close
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:193
AV_CODEC_ID_PRORES
@ AV_CODEC_ID_PRORES
Definition: codec_id.h:200
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