mirror of
https://github.com/FFmpeg/FFmpeg.git
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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
610 lines
25 KiB
C
610 lines
25 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* Targeted fuzzer that targets specific codecs depending on two
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compile-time flags.
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INSTRUCTIONS:
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* Get the very fresh clang, e.g. see http://libfuzzer.info#versions
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* Get and build libFuzzer:
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svn co http://llvm.org/svn/llvm-project/llvm/trunk/lib/Fuzzer
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./Fuzzer/build.sh
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* build ffmpeg for fuzzing:
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FLAGS="-fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp -g" CC="clang $FLAGS" CXX="clang++ $FLAGS" ./configure --disable-x86asm
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make clean && make -j
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* build the fuzz target.
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Choose the value of FFMPEG_CODEC (e.g. AV_CODEC_ID_DVD_SUBTITLE) and
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choose one of FUZZ_FFMPEG_VIDEO, FUZZ_FFMPEG_AUDIO, FUZZ_FFMPEG_SUBTITLE.
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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
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* create a corpus directory and put some samples there (empty dir is ok too):
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mkdir CORPUS && cp some-files CORPUS
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* Run fuzzing:
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./target_dec_fuzzer -max_len=100000 CORPUS
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More info:
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http://libfuzzer.info
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http://tutorial.libfuzzer.info
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https://github.com/google/oss-fuzz
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http://lcamtuf.coredump.cx/afl/
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https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
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*/
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#include "config.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/cpu.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "libavcodec/avcodec.h"
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#include "libavcodec/bytestream.h"
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#include "libavcodec/codec_internal.h"
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#include "libavformat/avformat.h"
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//For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
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#include "libavcodec/internal.h"
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
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extern const FFCodec * codec_list[];
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static void error(const char *err)
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{
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fprintf(stderr, "%s", err);
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exit(1);
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}
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static const FFCodec *c = NULL;
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static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
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{
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const AVCodec *res;
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res = avcodec_find_decoder(codec_id);
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if (!res)
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error("Failed to find decoder");
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return ffcodec(res);
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}
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static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
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int *got_sub_ptr, const AVPacket *avpkt)
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{
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AVSubtitle sub;
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int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
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if (ret >= 0 && *got_sub_ptr)
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avsubtitle_free(&sub);
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return ret;
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}
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static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame,
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int *got_frame, const AVPacket *dummy)
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{
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int ret = avcodec_receive_frame(avctx, frame);
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*got_frame = ret >= 0;
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return ret;
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}
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// Ensure we don't loop forever
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const uint32_t maxiteration = 8096;
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static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
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static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
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{
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ptrdiff_t linesize1[4];
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size_t size[4];
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int linesize_align[AV_NUM_DATA_POINTERS];
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int i, ret, w = frame->width, h = frame->height;
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avcodec_align_dimensions2(ctx, &w, &h, linesize_align);
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ret = av_image_fill_linesizes(frame->linesize, ctx->pix_fmt, w);
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if (ret < 0)
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return ret;
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for (i = 0; i < 4 && frame->linesize[i]; i++)
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linesize1[i] = frame->linesize[i] =
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FFALIGN(frame->linesize[i], linesize_align[i]);
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for (; i < 4; i++)
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linesize1[i] = 0;
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ret = av_image_fill_plane_sizes(size, ctx->pix_fmt, h, linesize1);
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if (ret < 0)
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return ret;
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frame->extended_data = frame->data;
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for (i = 0; i < 4 && size[i]; i++) {
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frame->buf[i] = av_buffer_alloc(size[i]);
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if (!frame->buf[i])
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goto fail;
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frame->data[i] = frame->buf[i]->data;
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}
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for (; i < AV_NUM_DATA_POINTERS; i++) {
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frame->data[i] = NULL;
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frame->linesize[i] = 0;
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}
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return 0;
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fail:
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av_frame_unref(frame);
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return AVERROR(ENOMEM);
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}
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static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
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{
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switch (ctx->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
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? fuzz_video_get_buffer(ctx, frame)
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: avcodec_default_get_buffer2(ctx, frame, flags);
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case AVMEDIA_TYPE_AUDIO:
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return avcodec_default_get_buffer2(ctx, frame, flags);
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default:
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return AVERROR(EINVAL);
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}
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}
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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uint64_t maxpixels_per_frame = 4096 * 4096;
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uint64_t maxpixels;
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uint64_t maxsamples_per_frame = 256*1024*32;
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uint64_t maxsamples;
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const uint64_t fuzz_tag = FUZZ_TAG;
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const uint8_t *last = data;
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const uint8_t *end = data + size;
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uint32_t it = 0;
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uint64_t ec_pixels = 0;
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uint64_t nb_samples = 0;
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int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
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int *got_picture_ptr,
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const AVPacket *avpkt) = NULL;
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AVCodecParserContext *parser = NULL;
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uint64_t keyframes = 0;
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uint64_t flushpattern = -1;
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AVDictionary *opts = NULL;
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if (!c) {
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#ifdef FFMPEG_DECODER
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#define DECODER_SYMBOL0(CODEC) ff_##CODEC##_decoder
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#define DECODER_SYMBOL(CODEC) DECODER_SYMBOL0(CODEC)
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extern FFCodec DECODER_SYMBOL(FFMPEG_DECODER);
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codec_list[0] = &DECODER_SYMBOL(FFMPEG_DECODER);
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#if FFMPEG_DECODER == tiff || FFMPEG_DECODER == tdsc
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extern FFCodec DECODER_SYMBOL(mjpeg);
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codec_list[1] = &DECODER_SYMBOL(mjpeg);
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#endif
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c = &DECODER_SYMBOL(FFMPEG_DECODER);
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#else
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c = AVCodecInitialize(FFMPEG_CODEC); // Done once.
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#endif
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av_log_set_level(AV_LOG_PANIC);
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}
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switch (c->p.type) {
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case AVMEDIA_TYPE_AUDIO :
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case AVMEDIA_TYPE_VIDEO : decode_handler = audio_video_handler ; break;
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case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler ; break;
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}
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switch (c->p.id) {
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case AV_CODEC_ID_APE: maxsamples_per_frame /= 256; break;
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}
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maxpixels = maxpixels_per_frame * maxiteration;
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maxsamples = maxsamples_per_frame * maxiteration;
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switch (c->p.id) {
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case AV_CODEC_ID_AASC: maxpixels /= 1024; break;
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case AV_CODEC_ID_AGM: maxpixels /= 1024; break;
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case AV_CODEC_ID_ANM: maxpixels /= 1024; break;
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case AV_CODEC_ID_APE: maxsamples /= 16384; break;
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case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
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case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
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case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
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case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
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case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
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case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
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case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
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case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
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case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
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case AV_CODEC_ID_CSCD: maxpixels /= 1024; break;
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case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
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case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
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case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
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case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
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case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
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case AV_CODEC_ID_DXA: maxpixels /= 32; break;
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case AV_CODEC_ID_DXV: maxpixels /= 32; break;
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case AV_CODEC_ID_EXR: maxpixels /= 1024; break;
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case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
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case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
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case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
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case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
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case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
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case AV_CODEC_ID_FMVC: maxpixels /= 1024; break;
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case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
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case AV_CODEC_ID_GEM: maxpixels /= 512; break;
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case AV_CODEC_ID_GDV: maxpixels /= 512; break;
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case AV_CODEC_ID_GIF: maxpixels /= 16; break;
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case AV_CODEC_ID_H264: maxpixels /= 256; break;
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case AV_CODEC_ID_HAP: maxpixels /= 128; break;
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case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
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case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
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case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
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case AV_CODEC_ID_IFF_ILBM: maxpixels /= 4096; break;
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case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
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case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
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case AV_CODEC_ID_JPEG2000: maxpixels /= 4096; break;
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case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
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case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
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case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
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case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
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case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
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case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
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case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
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case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
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case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
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case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
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case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
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case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
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case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
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case AV_CODEC_ID_MVHA: maxpixels /= 16384; break;
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case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
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case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
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case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
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case AV_CODEC_ID_NUV: maxpixels /= 128; break;
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case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
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case AV_CODEC_ID_PNG: maxpixels /= 128; break;
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case AV_CODEC_ID_APNG: maxpixels /= 128; break;
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case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
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case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
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case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
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case AV_CODEC_ID_QPEG: maxpixels /= 256; break;
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case AV_CODEC_ID_RKA: maxsamples /= 1<<20; break;
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case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
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case AV_CODEC_ID_RASC: maxpixels /= 16; break;
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case AV_CODEC_ID_RTV1: maxpixels /= 16; break;
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case AV_CODEC_ID_SANM: maxpixels /= 16; break;
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case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
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case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
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case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
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case AV_CODEC_ID_SPEEX: maxsamples /= 128; break;
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case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
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case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
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case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
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case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
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case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
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case AV_CODEC_ID_TGV: maxpixels /= 32; break;
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case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
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case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
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case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
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case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
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case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
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case AV_CODEC_ID_VB: maxpixels /= 1024; break;
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case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
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case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
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case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
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case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
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case AV_CODEC_ID_VMIX: maxpixels /= 8192; break;
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case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
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case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
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case AV_CODEC_ID_VP5: maxpixels /= 256; break;
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case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
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case AV_CODEC_ID_VP6A: maxpixels /= 4096; break;
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case AV_CODEC_ID_VP7: maxpixels /= 256; break;
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case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
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case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
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case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
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case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
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case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
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case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
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case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
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case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
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case AV_CODEC_ID_WMAPRO: maxsamples /= 16384; break;
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case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
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case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
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case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
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}
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maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
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maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
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AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
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AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
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if (!ctx || !parser_avctx)
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error("Failed memory allocation");
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if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
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ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
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ctx->max_samples = maxsamples_per_frame;
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ctx->get_buffer2 = fuzz_get_buffer2;
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if (c->p.capabilities & AV_CODEC_CAP_EXPERIMENTAL)
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ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
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if (size > 1024) {
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GetByteContext gbc;
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int extradata_size;
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int flags;
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uint64_t request_channel_layout;
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int64_t flags64;
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size -= 1024;
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bytestream2_init(&gbc, data + size, 1024);
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ctx->width = bytestream2_get_le32(&gbc);
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ctx->height = bytestream2_get_le32(&gbc);
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ctx->bit_rate = bytestream2_get_le64(&gbc);
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ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
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// Try to initialize a parser for this codec, note, this may fail which just means we test without one
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flags = bytestream2_get_byte(&gbc);
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if (flags & 1)
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parser = av_parser_init(c->p.id);
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if (flags & 2)
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ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
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if (flags & 4) {
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ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
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if (flags & 8)
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ctx->err_recognition |= AV_EF_EXPLODE;
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}
|
|
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;
|
|
}
|