123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611 |
- /*
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- /* Targeted fuzzer that targets specific codecs depending on two
- compile-time flags.
- INSTRUCTIONS:
- * Get the very fresh clang, e.g. see http://libfuzzer.info#versions
- * Get and build libFuzzer:
- svn co http://llvm.org/svn/llvm-project/llvm/trunk/lib/Fuzzer
- ./Fuzzer/build.sh
- * build ffmpeg for fuzzing:
- FLAGS="-fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp -g" CC="clang $FLAGS" CXX="clang++ $FLAGS" ./configure --disable-x86asm
- make clean && make -j
- * build the fuzz target.
- Choose the value of FFMPEG_CODEC (e.g. AV_CODEC_ID_DVD_SUBTITLE) and
- choose one of FUZZ_FFMPEG_VIDEO, FUZZ_FFMPEG_AUDIO, FUZZ_FFMPEG_SUBTITLE.
- 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
- * create a corpus directory and put some samples there (empty dir is ok too):
- mkdir CORPUS && cp some-files CORPUS
- * Run fuzzing:
- ./target_dec_fuzzer -max_len=100000 CORPUS
- More info:
- http://libfuzzer.info
- http://tutorial.libfuzzer.info
- https://github.com/google/oss-fuzz
- http://lcamtuf.coredump.cx/afl/
- https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
- */
- #include "config.h"
- #include "libavutil/avassert.h"
- #include "libavutil/avstring.h"
- #include "libavutil/cpu.h"
- #include "libavutil/imgutils.h"
- #include "libavutil/intreadwrite.h"
- #include "libavutil/mem.h"
- #include "libavcodec/avcodec.h"
- #include "libavcodec/bytestream.h"
- #include "libavcodec/codec_internal.h"
- #include "libavformat/avformat.h"
- //For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
- #include "libavcodec/internal.h"
- int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
- extern const FFCodec * codec_list[];
- static void error(const char *err)
- {
- fprintf(stderr, "%s", err);
- exit(1);
- }
- static const FFCodec *c = NULL;
- static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
- {
- const AVCodec *res;
- res = avcodec_find_decoder(codec_id);
- if (!res)
- error("Failed to find decoder");
- return ffcodec(res);
- }
- static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
- int *got_sub_ptr, const AVPacket *avpkt)
- {
- AVSubtitle sub;
- int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
- if (ret >= 0 && *got_sub_ptr)
- avsubtitle_free(&sub);
- return ret;
- }
- static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame,
- int *got_frame, const AVPacket *dummy)
- {
- int ret = avcodec_receive_frame(avctx, frame);
- *got_frame = ret >= 0;
- return ret;
- }
- // Ensure we don't loop forever
- const uint32_t maxiteration = 8096;
- static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
- static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
- {
- ptrdiff_t linesize1[4];
- size_t size[4];
- int linesize_align[AV_NUM_DATA_POINTERS];
- int i, ret, w = frame->width, h = frame->height;
- avcodec_align_dimensions2(ctx, &w, &h, linesize_align);
- ret = av_image_fill_linesizes(frame->linesize, ctx->pix_fmt, w);
- if (ret < 0)
- return ret;
- for (i = 0; i < 4 && frame->linesize[i]; i++)
- linesize1[i] = frame->linesize[i] =
- FFALIGN(frame->linesize[i], linesize_align[i]);
- for (; i < 4; i++)
- linesize1[i] = 0;
- ret = av_image_fill_plane_sizes(size, ctx->pix_fmt, h, linesize1);
- if (ret < 0)
- return ret;
- frame->extended_data = frame->data;
- for (i = 0; i < 4 && size[i]; i++) {
- frame->buf[i] = av_buffer_alloc(size[i]);
- if (!frame->buf[i])
- goto fail;
- frame->data[i] = frame->buf[i]->data;
- }
- for (; i < AV_NUM_DATA_POINTERS; i++) {
- frame->data[i] = NULL;
- frame->linesize[i] = 0;
- }
- return 0;
- fail:
- av_frame_unref(frame);
- return AVERROR(ENOMEM);
- }
- static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
- {
- switch (ctx->codec_type) {
- case AVMEDIA_TYPE_VIDEO:
- return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
- ? fuzz_video_get_buffer(ctx, frame)
- : avcodec_default_get_buffer2(ctx, frame, flags);
- case AVMEDIA_TYPE_AUDIO:
- return avcodec_default_get_buffer2(ctx, frame, flags);
- default:
- return AVERROR(EINVAL);
- }
- }
- int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
- uint64_t maxpixels_per_frame = 4096 * 4096;
- uint64_t maxpixels;
- uint64_t maxsamples_per_frame = 256*1024*32;
- uint64_t maxsamples;
- const uint64_t fuzz_tag = FUZZ_TAG;
- const uint8_t *last = data;
- const uint8_t *end = data + size;
- uint32_t it = 0;
- uint64_t ec_pixels = 0;
- uint64_t nb_samples = 0;
- int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
- int *got_picture_ptr,
- const AVPacket *avpkt) = NULL;
- AVCodecParserContext *parser = NULL;
- uint64_t keyframes = 0;
- uint64_t flushpattern = -1;
- AVDictionary *opts = NULL;
- if (!c) {
- #ifdef FFMPEG_DECODER
- #define DECODER_SYMBOL0(CODEC) ff_##CODEC##_decoder
- #define DECODER_SYMBOL(CODEC) DECODER_SYMBOL0(CODEC)
- extern FFCodec DECODER_SYMBOL(FFMPEG_DECODER);
- codec_list[0] = &DECODER_SYMBOL(FFMPEG_DECODER);
- #if FFMPEG_DECODER == tiff || FFMPEG_DECODER == tdsc
- extern FFCodec DECODER_SYMBOL(mjpeg);
- codec_list[1] = &DECODER_SYMBOL(mjpeg);
- #endif
- c = &DECODER_SYMBOL(FFMPEG_DECODER);
- #else
- c = AVCodecInitialize(FFMPEG_CODEC); // Done once.
- #endif
- av_log_set_level(AV_LOG_PANIC);
- }
- switch (c->p.type) {
- case AVMEDIA_TYPE_AUDIO :
- case AVMEDIA_TYPE_VIDEO : decode_handler = audio_video_handler ; break;
- case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler ; break;
- }
- switch (c->p.id) {
- case AV_CODEC_ID_APE: maxsamples_per_frame /= 256; break;
- }
- maxpixels = maxpixels_per_frame * maxiteration;
- maxsamples = maxsamples_per_frame * maxiteration;
- switch (c->p.id) {
- case AV_CODEC_ID_AASC: maxpixels /= 1024; break;
- case AV_CODEC_ID_AGM: maxpixels /= 1024; break;
- case AV_CODEC_ID_ANM: maxpixels /= 1024; break;
- case AV_CODEC_ID_APE: maxsamples /= 16384; break;
- case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
- case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
- case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
- case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
- case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
- case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
- case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
- case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
- case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
- case AV_CODEC_ID_CSCD: maxpixels /= 1024; break;
- case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
- case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
- case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
- case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
- case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
- case AV_CODEC_ID_DXA: maxpixels /= 32; break;
- case AV_CODEC_ID_DXV: maxpixels /= 32; break;
- case AV_CODEC_ID_EXR: maxpixels /= 1024; break;
- case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
- case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
- case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
- case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
- case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
- case AV_CODEC_ID_FMVC: maxpixels /= 1024; break;
- case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
- case AV_CODEC_ID_GEM: maxpixels /= 512; break;
- case AV_CODEC_ID_GDV: maxpixels /= 512; break;
- case AV_CODEC_ID_GIF: maxpixels /= 16; break;
- case AV_CODEC_ID_H264: maxpixels /= 256; break;
- case AV_CODEC_ID_HAP: maxpixels /= 128; break;
- case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
- case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
- case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
- case AV_CODEC_ID_IFF_ILBM: maxpixels /= 4096; break;
- case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
- case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
- case AV_CODEC_ID_JPEG2000: maxpixels /= 16384; break;
- case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
- case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
- case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
- case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
- case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
- case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
- case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
- case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
- case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
- case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
- case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
- case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
- case AV_CODEC_ID_MV30: maxpixels /= 128; break;
- case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
- case AV_CODEC_ID_MVHA: maxpixels /= 16384; break;
- case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
- case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
- case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
- case AV_CODEC_ID_NUV: maxpixels /= 128; break;
- case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
- case AV_CODEC_ID_PNG: maxpixels /= 128; break;
- case AV_CODEC_ID_APNG: maxpixels /= 128; break;
- case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
- case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
- case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
- case AV_CODEC_ID_QPEG: maxpixels /= 256; break;
- case AV_CODEC_ID_RKA: maxsamples /= 1<<20; break;
- case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
- case AV_CODEC_ID_RASC: maxpixels /= 16; break;
- case AV_CODEC_ID_RTV1: maxpixels /= 16; break;
- case AV_CODEC_ID_RV30: maxpixels /= 16; break;
- case AV_CODEC_ID_SANM: maxpixels /= 16; break;
- case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
- case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
- case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
- case AV_CODEC_ID_SPEEX: maxsamples /= 128; break;
- case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
- case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
- case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
- case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
- case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
- case AV_CODEC_ID_TGV: maxpixels /= 32; break;
- case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
- case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
- case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
- case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
- case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
- case AV_CODEC_ID_VB: maxpixels /= 1024; break;
- case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
- case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
- case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
- case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
- case AV_CODEC_ID_VMIX: maxpixels /= 8192; break;
- case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
- case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
- case AV_CODEC_ID_VP5: maxpixels /= 256; break;
- case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
- case AV_CODEC_ID_VP6A: maxpixels /= 4096; break;
- case AV_CODEC_ID_VP7: maxpixels /= 256; break;
- case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
- case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
- case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
- case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
- case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
- case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
- case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
- case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
- case AV_CODEC_ID_WMAPRO: maxsamples /= 16384; break;
- case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
- case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
- case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
- }
- maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
- maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
- AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
- AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
- if (!ctx || !parser_avctx)
- error("Failed memory allocation");
- if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
- ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
- ctx->max_samples = maxsamples_per_frame;
- ctx->get_buffer2 = fuzz_get_buffer2;
- if (c->p.capabilities & AV_CODEC_CAP_EXPERIMENTAL)
- ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
- if (size > 1024) {
- GetByteContext gbc;
- int extradata_size;
- int flags;
- uint64_t request_channel_layout;
- int64_t flags64;
- size -= 1024;
- bytestream2_init(&gbc, data + size, 1024);
- ctx->width = bytestream2_get_le32(&gbc);
- ctx->height = bytestream2_get_le32(&gbc);
- ctx->bit_rate = bytestream2_get_le64(&gbc);
- ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
- // Try to initialize a parser for this codec, note, this may fail which just means we test without one
- flags = bytestream2_get_byte(&gbc);
- if (flags & 1)
- parser = av_parser_init(c->p.id);
- if (flags & 2)
- ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
- if (flags & 4) {
- ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
- if (flags & 8)
- ctx->err_recognition |= AV_EF_EXPLODE;
- }
- if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
- ctx->flags2 |= AV_CODEC_FLAG2_FAST;
- if (flags & 0x80)
- ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
- if (flags & 0x40)
- av_force_cpu_flags(0);
- extradata_size = bytestream2_get_le32(&gbc);
- ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
- ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
- ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
- ctx->codec_tag = bytestream2_get_le32(&gbc);
- if (c->codec_tags) {
- int n;
- for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
- ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
- }
- keyframes = bytestream2_get_le64(&gbc);
- request_channel_layout = bytestream2_get_le64(&gbc);
- ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
- flushpattern = bytestream2_get_le64(&gbc);
- ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
- if (flags & 0x20) {
- switch (ctx->codec_id) {
- case AV_CODEC_ID_AC3:
- case AV_CODEC_ID_EAC3:
- av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
- av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
- av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
- av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
- break;
- }
- }
- // Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
- // remain reproducible.
- if (request_channel_layout) {
- switch (ctx->codec_id) {
- case AV_CODEC_ID_AC3:
- case AV_CODEC_ID_EAC3:
- case AV_CODEC_ID_MLP:
- case AV_CODEC_ID_TRUEHD:
- case AV_CODEC_ID_DTS:
- if (request_channel_layout & ~INT64_MIN) {
- char *downmix_layout = av_mallocz(19);
- if (!downmix_layout)
- error("Failed memory allocation");
- av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
- av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
- }
- if (ctx->codec_id != AV_CODEC_ID_DTS)
- break;
- // fall-through
- case AV_CODEC_ID_DOLBY_E:
- av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
- break;
- }
- }
- flags64 = bytestream2_get_le64(&gbc);
- if (flags64 &1)
- ctx->debug |= FF_DEBUG_SKIP;
- if (flags64 &2)
- ctx->debug |= FF_DEBUG_QP;
- if (flags64 &4)
- ctx->debug |= FF_DEBUG_MB_TYPE;
- if (flags64 & 8)
- ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
- if (flags64 & 0x10)
- ctx->err_recognition |= AV_EF_CRCCHECK;
- ctx->workaround_bugs = bytestream2_get_le32(&gbc);
- if (c->p.max_lowres) {
- ctx->lowres = bytestream2_get_byte(&gbc) % (c->p.max_lowres+1);
- }
- if (extradata_size < size) {
- ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
- if (ctx->extradata) {
- ctx->extradata_size = extradata_size;
- size -= ctx->extradata_size;
- memcpy(ctx->extradata, data + size, ctx->extradata_size);
- }
- }
- if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
- ctx->width = ctx->height = 0;
- }
- int res = avcodec_open2(ctx, &c->p, &opts);
- if (res < 0) {
- avcodec_free_context(&ctx);
- av_free(parser_avctx);
- av_parser_close(parser);
- av_dict_free(&opts);
- return 0; // Failure of avcodec_open2() does not imply that a issue was found
- }
- parser_avctx->codec_id = ctx->codec_id;
- parser_avctx->extradata_size = ctx->extradata_size;
- parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
- int got_frame;
- AVFrame *frame = av_frame_alloc();
- AVPacket *avpkt = av_packet_alloc();
- AVPacket *parsepkt = av_packet_alloc();
- if (!frame || !avpkt || !parsepkt)
- error("Failed memory allocation");
- // Read very simple container
- while (data < end && it < maxiteration) {
- // Search for the TAG
- while (data + sizeof(fuzz_tag) < end) {
- if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
- break;
- data++;
- }
- if (data + sizeof(fuzz_tag) > end)
- data = end;
- res = av_new_packet(parsepkt, data - last);
- if (res < 0)
- error("Failed memory allocation");
- memcpy(parsepkt->data, last, data - last);
- parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
- keyframes = (keyframes >> 2) + (keyframes<<62);
- data += sizeof(fuzz_tag);
- last = data;
- while (parsepkt->size > 0) {
- int decode_more;
- if (parser) {
- int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
- parsepkt->data, parsepkt->size,
- parsepkt->pts, parsepkt->dts, parsepkt->pos);
- if (avpkt->data == parsepkt->data) {
- avpkt->buf = av_buffer_ref(parsepkt->buf);
- if (!avpkt->buf)
- error("Failed memory allocation");
- } else {
- if (av_packet_make_refcounted(avpkt) < 0)
- error("Failed memory allocation");
- }
- parsepkt->data += ret;
- parsepkt->size -= ret;
- parsepkt->pos += ret;
- avpkt->pts = parser->pts;
- avpkt->dts = parser->dts;
- avpkt->pos = parser->pos;
- if ( parser->key_frame == 1 ||
- (parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
- avpkt->flags |= AV_PKT_FLAG_KEY;
- avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
- } else {
- av_packet_move_ref(avpkt, parsepkt);
- }
- if (!(flushpattern & 7))
- avcodec_flush_buffers(ctx);
- flushpattern = (flushpattern >> 3) + (flushpattern << 61);
- if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
- int ret = avcodec_send_packet(ctx, avpkt);
- decode_more = ret >= 0;
- if(!decode_more) {
- ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
- if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
- ctx->error_concealment = 0;
- ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
- }
- if (ec_pixels > maxpixels)
- goto maximums_reached;
- }
- } else
- decode_more = 1;
- // Iterate through all data
- while (decode_more && it++ < maxiteration) {
- av_frame_unref(frame);
- int ret = decode_handler(ctx, frame, &got_frame, avpkt);
- ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
- if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
- ctx->error_concealment = 0;
- ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
- }
- if (ec_pixels > maxpixels)
- goto maximums_reached;
- if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
- frame->nb_samples == 0 && !got_frame &&
- (avpkt->flags & AV_PKT_FLAG_DISCARD))
- nb_samples += ctx->max_samples;
- nb_samples += frame->nb_samples;
- if (nb_samples > maxsamples)
- goto maximums_reached;
- if (ret <= 0 || ret > avpkt->size)
- break;
- if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
- avpkt->data += ret;
- avpkt->size -= ret;
- decode_more = avpkt->size > 0;
- } else
- decode_more = ret >= 0;
- }
- av_packet_unref(avpkt);
- }
- av_packet_unref(parsepkt);
- }
- maximums_reached:
- av_packet_unref(avpkt);
- if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
- avcodec_send_packet(ctx, NULL);
- do {
- got_frame = 0;
- av_frame_unref(frame);
- decode_handler(ctx, frame, &got_frame, avpkt);
- nb_samples += frame->nb_samples;
- if (nb_samples > maxsamples)
- break;
- } while (got_frame == 1 && it++ < maxiteration);
- fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
- av_frame_free(&frame);
- avcodec_free_context(&ctx);
- avcodec_free_context(&parser_avctx);
- av_parser_close(parser);
- av_packet_free(&avpkt);
- av_packet_free(&parsepkt);
- av_dict_free(&opts);
- return 0;
- }
|