FFmpeg: tools/target_dec_fuzzer.c Source File

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_BINKVIDEO: maxpixels /= 32; break;
217  case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
218  case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
219  case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
220  case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
221  case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
222  case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
223  case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
224  case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
225  case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
226  case AV_CODEC_ID_DXA: maxpixels /= 32; break;
227  case AV_CODEC_ID_DXV: maxpixels /= 32; break;
228  case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
229  case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
230  case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
231  case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
232  case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
233  case AV_CODEC_ID_GEM: maxpixels /= 512; break;
234  case AV_CODEC_ID_GDV: maxpixels /= 512; break;
235  case AV_CODEC_ID_GIF: maxpixels /= 16; break;
236  case AV_CODEC_ID_H264: maxpixels /= 256; break;
237  case AV_CODEC_ID_HAP: maxpixels /= 128; break;
238  case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
239  case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
240  case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
241  case AV_CODEC_ID_IFF_ILBM: maxpixels /= 128; break;
242  case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
243  case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
244  case AV_CODEC_ID_JPEG2000: maxpixels /= 16; break;
245  case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
246  case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
247  case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
248  case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
249  case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
250  case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
251  case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
252  case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
253  case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
254  case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
255  case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
256  case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
257  case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
258  case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
259  case AV_CODEC_ID_PNG: maxpixels /= 128; break;
260  case AV_CODEC_ID_APNG: maxpixels /= 128; break;
261  case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
262  case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
263  case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
264  case AV_CODEC_ID_RASC: maxpixels /= 16; break;
265  case AV_CODEC_ID_SANM: maxpixels /= 16; break;
266  case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
267  case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
268  case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
269  case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
270  case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
271  case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
272  case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
273  case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
274  case AV_CODEC_ID_TGV: maxpixels /= 32; break;
275  case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
276  case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
277  case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
278  case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
279  case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
280  case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
281  case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
282  case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
283  case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
284  case AV_CODEC_ID_VP5: maxpixels /= 256; break;
285  case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
286  case AV_CODEC_ID_VP7: maxpixels /= 256; break;
287  case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
288  case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
289  case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
290  case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
291  case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
292  case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
293  case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
294  case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
295  case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
296  case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
297  }
298 
299  maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
300  maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
301 
302  AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
303  AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
304  if (!ctx || !parser_avctx)
305  error("Failed memory allocation");
306 
307  if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
308  ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
309 
310  ctx->max_samples = maxsamples_per_frame;
311  ctx->get_buffer2 = fuzz_get_buffer2;
312 
313  if (size > 1024) {
314  GetByteContext gbc;
315  int extradata_size;
316  int flags;
317  uint64_t request_channel_layout;
318  int64_t flags64;
319 
320  size -= 1024;
321  bytestream2_init(&gbc, data + size, 1024);
322  ctx->width = bytestream2_get_le32(&gbc);
323  ctx->height = bytestream2_get_le32(&gbc);
324  ctx->bit_rate = bytestream2_get_le64(&gbc);
325  ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
326  // Try to initialize a parser for this codec, note, this may fail which just means we test without one
327  flags = bytestream2_get_byte(&gbc);
328  if (flags & 1)
329  parser = av_parser_init(c->p.id);
330  if (flags & 2)
331  ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
332  if (flags & 4) {
333  ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
334  if (flags & 8)
335  ctx->err_recognition |= AV_EF_EXPLODE;
336  }
337  if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
338  ctx->flags2 |= AV_CODEC_FLAG2_FAST;
339  if (flags & 0x80)
340  ctx->flags2 |= AV_CODEC_FLAG2_EXPORT_MVS;
341 
342  if (flags & 0x40)
343  av_force_cpu_flags(0);
344 
345  extradata_size = bytestream2_get_le32(&gbc);
346 
347  ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
348  ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
349  ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
350  ctx->codec_tag = bytestream2_get_le32(&gbc);
351  if (c->codec_tags) {
352  int n;
353  for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
354  ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
355  }
356  keyframes = bytestream2_get_le64(&gbc);
357  request_channel_layout = bytestream2_get_le64(&gbc);
358 
359  ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
360  flushpattern = bytestream2_get_le64(&gbc);
361  ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
362 
363 
364  if (flags & 0x20) {
365  switch (ctx->codec_id) {
366  case AV_CODEC_ID_AC3:
367  case AV_CODEC_ID_EAC3:
368  av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
369  av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
370  av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
371  av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
372  break;
373  }
374  }
375 
376  // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
377  // remain reproducible.
378  if (request_channel_layout) {
379  switch (ctx->codec_id) {
380  case AV_CODEC_ID_AC3:
381  case AV_CODEC_ID_EAC3:
382  case AV_CODEC_ID_MLP:
383  case AV_CODEC_ID_TRUEHD:
384  case AV_CODEC_ID_DTS:
385  if (request_channel_layout & ~INT64_MIN) {
386  char *downmix_layout = av_mallocz(19);
387  if (!downmix_layout)
388  error("Failed memory allocation");
389  av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
390  av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
391  }
392  if (ctx->codec_id != AV_CODEC_ID_DTS)
393  break;
394  // fall-through
395  case AV_CODEC_ID_DOLBY_E:
396  av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
397  break;
398  }
399  }
400 
401  flags64 = bytestream2_get_le64(&gbc);
402  if (flags64 &1)
403  ctx->debug |= FF_DEBUG_SKIP;
404  if (flags64 &2)
405  ctx->debug |= FF_DEBUG_QP;
406  if (flags64 &4)
407  ctx->debug |= FF_DEBUG_MB_TYPE;
408 
409  if (extradata_size < size) {
410  ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
411  if (ctx->extradata) {
412  ctx->extradata_size = extradata_size;
413  size -= ctx->extradata_size;
414  memcpy(ctx->extradata, data + size, ctx->extradata_size);
415  }
416  }
417  if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
418  ctx->width = ctx->height = 0;
419  }
420 
421  int res = avcodec_open2(ctx, &c->p, &opts);
422  if (res < 0) {
423  avcodec_free_context(&ctx);
424  av_free(parser_avctx);
425  av_parser_close(parser);
426  av_dict_free(&opts);
427  return 0; // Failure of avcodec_open2() does not imply that a issue was found
428  }
429  parser_avctx->codec_id = ctx->codec_id;
430  parser_avctx->extradata_size = ctx->extradata_size;
431  parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
432 
433 
434  int got_frame;
435  AVFrame *frame = av_frame_alloc();
436  AVPacket *avpkt = av_packet_alloc();
437  AVPacket *parsepkt = av_packet_alloc();
438  if (!frame || !avpkt || !parsepkt)
439  error("Failed memory allocation");
440 
441  // Read very simple container
442  while (data < end && it < maxiteration) {
443  // Search for the TAG
444  while (data + sizeof(fuzz_tag) < end) {
445  if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
446  break;
447  data++;
448  }
449  if (data + sizeof(fuzz_tag) > end)
450  data = end;
451 
452  res = av_new_packet(parsepkt, data - last);
453  if (res < 0)
454  error("Failed memory allocation");
455  memcpy(parsepkt->data, last, data - last);
456  parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
457  keyframes = (keyframes >> 2) + (keyframes<<62);
458  data += sizeof(fuzz_tag);
459  last = data;
460 
461  while (parsepkt->size > 0) {
462  int decode_more;
463 
464  if (parser) {
465  int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
466  parsepkt->data, parsepkt->size,
467  parsepkt->pts, parsepkt->dts, parsepkt->pos);
468  if (avpkt->data == parsepkt->data) {
469  avpkt->buf = av_buffer_ref(parsepkt->buf);
470  if (!avpkt->buf)
471  error("Failed memory allocation");
472  } else {
473  if (av_packet_make_refcounted(avpkt) < 0)
474  error("Failed memory allocation");
475  }
476  parsepkt->data += ret;
477  parsepkt->size -= ret;
478  parsepkt->pos += ret;
479  avpkt->pts = parser->pts;
480  avpkt->dts = parser->dts;
481  avpkt->pos = parser->pos;
482  if ( parser->key_frame == 1 ||
483  (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
484  avpkt->flags |= AV_PKT_FLAG_KEY;
485  avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
486  } else {
487  av_packet_move_ref(avpkt, parsepkt);
488  }
489 
490  if (!(flushpattern & 7))
491  avcodec_flush_buffers(ctx);
492  flushpattern = (flushpattern >> 3) + (flushpattern << 61);
493 
494  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
495  int ret = avcodec_send_packet(ctx, avpkt);
496  decode_more = ret >= 0;
497  if(!decode_more) {
498  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
499  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
500  ctx->error_concealment = 0;
501  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
502  }
503  if (ec_pixels > maxpixels)
504  goto maximums_reached;
505  }
506  } else
507  decode_more = 1;
508 
509  // Iterate through all data
510  while (decode_more && it++ < maxiteration) {
511  av_frame_unref(frame);
512  int ret = decode_handler(ctx, frame, &got_frame, avpkt);
513 
514  ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
515  if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
516  ctx->error_concealment = 0;
517  ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
518  }
519  if (ec_pixels > maxpixels)
520  goto maximums_reached;
521 
522  if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
523  frame->nb_samples == 0 && !got_frame &&
524  (avpkt->flags & AV_PKT_FLAG_DISCARD))
525  nb_samples += ctx->max_samples;
526 
527  nb_samples += frame->nb_samples;
528  if (nb_samples > maxsamples)
529  goto maximums_reached;
530 
531  if (ret <= 0 || ret > avpkt->size)
532  break;
533 
534  if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
535  avpkt->data += ret;
536  avpkt->size -= ret;
537  decode_more = avpkt->size > 0;
538  } else
539  decode_more = ret >= 0;
540  }
541  av_packet_unref(avpkt);
542  }
543  av_packet_unref(parsepkt);
544  }
545 maximums_reached:
546 
547  av_packet_unref(avpkt);
548 
549  if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
550  avcodec_send_packet(ctx, NULL);
551 
552  do {
553  got_frame = 0;
554  av_frame_unref(frame);
555  decode_handler(ctx, frame, &got_frame, avpkt);
556 
557  nb_samples += frame->nb_samples;
558  if (nb_samples > maxsamples)
559  break;
560  } while (got_frame == 1 && it++ < maxiteration);
561 
562  fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
563 
564  av_frame_free(&frame);
565  avcodec_free_context(&ctx);
566  avcodec_free_context(&parser_avctx);
567  av_parser_close(parser);
568  av_packet_free(&avpkt);
569  av_packet_free(&parsepkt);
570  av_dict_free(&opts);
571  return 0;
572 }
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:127
AVSubtitle
Definition: avcodec.h:2305
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:422
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:73
AVCodec
AVCodec.
Definition: codec.h:196
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h:142
AV_CODEC_ID_SANM
@ AV_CODEC_ID_SANM
Definition: codec_id.h:232
AV_CODEC_ID_LAGARITH
@ AV_CODEC_ID_LAGARITH
Definition: codec_id.h:197
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:2808
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:430
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:459
AV_CODEC_ID_TQI
@ AV_CODEC_ID_TQI
Definition: codec_id.h:172
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1305
AVCodecParserContext::pict_type
int pict_type
Definition: avcodec.h:2797
GetByteContext
Definition: bytestream.h:33
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: codec_id.h:505
sub
static float sub(float src0, float src1)
Definition: dnn_backend_native_layer_mathbinary.c:31
AV_CODEC_ID_LOCO
@ AV_CODEC_ID_LOCO
Definition: codec_id.h:122
AV_LOG_PANIC
#define AV_LOG_PANIC
Something went really wrong and we will crash now.
Definition: log.h:167
AV_PKT_FLAG_DISCARD
#define AV_PKT_FLAG_DISCARD
Flag is used to discard packets which are required to maintain valid decoder state but are not requir...
Definition: packet.h:436
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:166
AV_CODEC_ID_MVC2
@ AV_CODEC_ID_MVC2
Definition: codec_id.h:235
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:111
AV_RN64
#define AV_RN64(p)
Definition: intreadwrite.h:368
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
w
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1510
avcodec_decode_subtitle2
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)
Decode a subtitle message.
Definition: decode.c:816
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:100
data
const char data[16]
Definition: mxf.c:143
AV_CODEC_ID_CDTOONS
@ AV_CODEC_ID_CDTOONS
Definition: codec_id.h:299
FFCodec
Definition: codec_internal.h:112
c
static const FFCodec * c
Definition: target_dec_fuzzer.c:73
AV_CODEC_ID_GDV
@ AV_CODEC_ID_GDV
Definition: codec_id.h:284
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: codec_id.h:292
AV_CODEC_ID_SCREENPRESSO
@ AV_CODEC_ID_SCREENPRESSO
Definition: codec_id.h:242
AV_EF_COMPLIANT
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:1359
AVDictionary
Definition: dict.c:30
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:439
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
AV_CODEC_ID_APNG
@ AV_CODEC_ID_APNG
Definition: codec_id.h:264
AV_CODEC_ID_MXPEG
@ AV_CODEC_ID_MXPEG
Definition: codec_id.h:196
av_strlcatf
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:104
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:471
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:73
AV_CODEC_ID_DSICINVIDEO
@ AV_CODEC_ID_DSICINVIDEO
Definition: codec_id.h:144
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:312
AVCodecParserContext::key_frame
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:2838
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:116
AV_CODEC_ID_IFF_ILBM
@ AV_CODEC_ID_IFF_ILBM
Definition: codec_id.h:186
fail
#define fail()
Definition: checkasm.h:131
AV_CODEC_ID_MSZH
@ AV_CODEC_ID_MSZH
Definition: codec_id.h:103
dummy
int dummy
Definition: motion.c:65
AV_CODEC_ID_SMACKAUDIO
@ AV_CODEC_ID_SMACKAUDIO
Definition: codec_id.h:450
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:495
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2809
FF_CODEC_TAGS_END
#define FF_CODEC_TAGS_END
FFCodec.codec_tags termination value.
Definition: codec_internal.h:80
avsubtitle_free
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: avcodec.c:418
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:72
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:99
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:528
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1322
avassert.h
LLVMFuzzerTestOneInput
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
Definition: target_dec_fuzzer.c:161
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: codec_id.h:266
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:491
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:149
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
intreadwrite.h
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:97
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: codec_id.h:218
AV_CODEC_ID_WS_VQA
@ AV_CODEC_ID_WS_VQA
Definition: codec_id.h:94
AV_CODEC_ID_ARGO
@ AV_CODEC_ID_ARGO
Definition: codec_id.h:306
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:68
avcodec_receive_frame
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
Definition: decode.c:639
ctx
AVFormatContext * ctx
Definition: movenc.c:48
avcodec_align_dimensions2
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
Definition: utils.c:140
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:371
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:511
AV_CODEC_ID_VC1IMAGE
@ AV_CODEC_ID_VC1IMAGE
Definition: codec_id.h:202
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:77
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:399
AV_CODEC_ID_PNG
@ AV_CODEC_ID_PNG
Definition: codec_id.h:111
if
if(ret)
Definition: filter_design.txt:179
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:54
AV_CODEC_ID_WMV3
@ AV_CODEC_ID_WMV3
Definition: codec_id.h:121
opts
AVDictionary * opts
Definition: movenc.c:50
FUZZ_TAG
static const uint64_t FUZZ_TAG
Definition: target_dec_fuzzer.c:105
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:357
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:508
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: codec_id.h:211
AVCodec::type
enum AVMediaType type
Definition: codec.h:209
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:1326
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: codec_id.h:465
AV_CODEC_ID_CINEPAK
@ AV_CODEC_ID_CINEPAK
Definition: codec_id.h:93
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: codec_id.h:169
AV_CODEC_FLAG2_FAST
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:293
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AV_CODEC_ID_ANM
@ AV_CODEC_ID_ANM
Definition: codec_id.h:184
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:115
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1355
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:479
AV_CODEC_ID_VP4
@ AV_CODEC_ID_VP4
Definition: codec_id.h:295
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:472
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:67
AV_EF_CAREFUL
#define AV_EF_CAREFUL
consider things that violate the spec, are fast to calculate and have not been seen in the wild as er...
Definition: avcodec.h:1358
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
avcodec_find_decoder
const AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:935
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:467
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: codec_id.h:294
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: codec_id.h:289
subtitle_handler
static int subtitle_handler(AVCodecContext *avctx, void *frame, int *got_sub_ptr, AVPacket *avpkt)
Definition: target_dec_fuzzer.c:84
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AV_CODEC_ID_SCPR
@ AV_CODEC_ID_SCPR
Definition: codec_id.h:276
AVPacket::size
int size
Definition: packet.h:375
codec_internal.h
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: codec_id.h:271
cpu.h
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: codec_id.h:290
codec_list
const FFCodec * codec_list[]
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: codec_id.h:241
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:431
size
int size
Definition: twinvq_data.h:10344
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:326
ffcodec
static const av_always_inline FFCodec * ffcodec(const AVCodec *codec)
Definition: codec_internal.h:273
AV_CODEC_ID_MSRLE
@ AV_CODEC_ID_MSRLE
Definition: codec_id.h:95
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:487
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
AV_CODEC_ID_MMVIDEO
@ AV_CODEC_ID_MMVIDEO
Definition: codec_id.h:130
av_packet_make_refcounted
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:485
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:62
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
av_buffer_alloc
AVBufferRef * av_buffer_alloc(size_t size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:77
AV_CODEC_ID_DXA
@ AV_CODEC_ID_DXA
Definition: codec_id.h:148
AV_CODEC_ID_INDEO4
@ AV_CODEC_ID_INDEO4
Definition: codec_id.h:161
AV_CODEC_ID_MSS2
@ AV_CODEC_ID_MSS2
Definition: codec_id.h:217
AVCodec::id
enum AVCodecID id
Definition: codec.h:210
AV_CODEC_ID_HQ_HQA
@ AV_CODEC_ID_HQ_HQA
Definition: codec_id.h:238
AV_CODEC_ID_VP5
@ AV_CODEC_ID_VP5
Definition: codec_id.h:140
AV_CODEC_ID_VP3
@ AV_CODEC_ID_VP3
Definition: codec_id.h:79
AV_CODEC_ID_GIF
@ AV_CODEC_ID_GIF
Definition: codec_id.h:147
AV_CODEC_ID_TGV
@ AV_CODEC_ID_TGV
Definition: codec_id.h:170
AV_CODEC_ID_VP7
@ AV_CODEC_ID_VP7
Definition: codec_id.h:231
avcodec_default_get_buffer2
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: get_buffer.c:290
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:576
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:2891
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:490
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: codec_id.h:80
FF_DEBUG_SKIP
#define FF_DEBUG_SKIP
Definition: avcodec.h:1329
AV_CODEC_ID_PAF_VIDEO
@ AV_CODEC_ID_PAF_VIDEO
Definition: codec_id.h:229
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:224
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_HNM4_VIDEO
@ AV_CODEC_ID_HNM4_VIDEO
Definition: codec_id.h:223
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:477
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:120
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:138
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2789
AVCodecInitialize
static const FFCodec * AVCodecInitialize(enum AVCodecID codec_id)
Definition: target_dec_fuzzer.c:74
fuzz_video_get_buffer
static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
Definition: target_dec_fuzzer.c:107
AV_CODEC_ID_SMACKVIDEO
@ AV_CODEC_ID_SMACKVIDEO
Definition: codec_id.h:133
ret
ret
Definition: filter_design.txt:187
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: avcodec.c:377
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:1327
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
fuzz_get_buffer2
static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
Definition: target_dec_fuzzer.c:147
AV_CODEC_ID_AGM
@ AV_CODEC_ID_AGM
Definition: codec_id.h:293
AVFormatContext::debug
int debug
Flags to enable debugging.
Definition: avformat.h:1485
AVCodecContext
main external API structure.
Definition: avcodec.h:389
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:262
AV_CODEC_ID_HAP
@ AV_CODEC_ID_HAP
Definition: codec_id.h:239
AV_CODEC_ID_BINKVIDEO
@ AV_CODEC_ID_BINKVIDEO
Definition: codec_id.h:185
FFCodec::codec_tags
const uint32_t * codec_tags
List of supported codec_tags, terminated by FF_CODEC_TAGS_END.
Definition: codec_internal.h:251
AV_CODEC_ID_SIMBIOSIS_IMX
@ AV_CODEC_ID_SIMBIOSIS_IMX
Definition: codec_id.h:308
AV_CODEC_ID_MSA1
@ AV_CODEC_ID_MSA1
Definition: codec_id.h:213
AV_CODEC_ID_VMNC
@ AV_CODEC_ID_VMNC
Definition: codec_id.h:139
AV_EF_AGGRESSIVE
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:1360
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it.
Definition: dict.c:147
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_parser_parse2
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
Definition: parser.c:115
AV_CODEC_ID_QTRLE
@ AV_CODEC_ID_QTRLE
Definition: codec_id.h:105
AV_CODEC_ID_GEM
@ AV_CODEC_ID_GEM
Definition: codec_id.h:310
it
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s it
Definition: writing_filters.txt:31
AV_CODEC_ID_G2M
@ AV_CODEC_ID_G2M
Definition: codec_id.h:221
AV_CODEC_ID_TSCC
@ AV_CODEC_ID_TSCC
Definition: codec_id.h:106
AV_CODEC_FLAG2_EXPORT_MVS
#define AV_CODEC_FLAG2_EXPORT_MVS
Export motion vectors through frame side data.
Definition: avcodec.h:325
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:351
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: codec_id.h:489
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:452
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: codec_id.h:447
h
h
Definition: vp9dsp_template.c:2038
AV_CODEC_ID_TARGA
@ AV_CODEC_ID_TARGA
Definition: codec_id.h:143
AV_CODEC_ID_VORBIS
@ AV_CODEC_ID_VORBIS
Definition: codec_id.h:432
AV_CODEC_ID_WMV3IMAGE
@ AV_CODEC_ID_WMV3IMAGE
Definition: codec_id.h:201
avstring.h
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:318
FF_SANE_NB_CHANNELS
#define FF_SANE_NB_CHANNELS
Definition: internal.h:36
AV_CODEC_ID_FLV1
@ AV_CODEC_ID_FLV1
Definition: codec_id.h:71
AV_CODEC_ID_DFA
@ AV_CODEC_ID_DFA
Definition: codec_id.h:200
int
int
Definition: ffmpeg_filter.c:153
AV_CODEC_ID_AASC
@ AV_CODEC_ID_AASC
Definition: codec_id.h:124
maxiteration
const uint32_t maxiteration
Definition: target_dec_fuzzer.c:103
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: codec_id.h:456
av_parser_close
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:189
AV_CODEC_ID_PRORES
@ AV_CODEC_ID_PRORES
Definition: codec_id.h:198
Generated on Wed Aug 24 2022 21:42:28 for FFmpeg by   doxygen 1.8.17

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