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590 lines
24 KiB
590 lines
24 KiB
/* |
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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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|
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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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|
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* Run fuzzing: |
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./target_dec_fuzzer -max_len=100000 CORPUS |
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|
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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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|
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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 "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_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_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_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_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 /= 128; 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_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_RSCC: maxpixels /= 256; break; |
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case AV_CODEC_ID_RASC: 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_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_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_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_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 (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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} |
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if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264) |
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ctx->flags2 |= AV_CODEC_FLAG2_FAST; |
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if (flags & 0x80) |
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ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS; |
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if (flags & 0x40) |
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av_force_cpu_flags(0); |
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extradata_size = bytestream2_get_le32(&gbc); |
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ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF; |
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ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS; |
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ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF; |
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ctx->codec_tag = bytestream2_get_le32(&gbc); |
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if (c->codec_tags) { |
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int n; |
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for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++); |
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ctx->codec_tag = c->codec_tags[ctx->codec_tag % n]; |
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} |
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keyframes = bytestream2_get_le64(&gbc); |
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request_channel_layout = bytestream2_get_le64(&gbc); |
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ctx->idct_algo = bytestream2_get_byte(&gbc) % 25; |
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flushpattern = bytestream2_get_le64(&gbc); |
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ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL; |
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if (flags & 0x20) { |
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switch (ctx->codec_id) { |
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case AV_CODEC_ID_AC3: |
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case AV_CODEC_ID_EAC3: |
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av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0); |
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av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0); |
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av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0); |
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av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0); |
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break; |
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} |
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} |
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// Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures |
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// remain reproducible. |
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if (request_channel_layout) { |
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switch (ctx->codec_id) { |
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case AV_CODEC_ID_AC3: |
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case AV_CODEC_ID_EAC3: |
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case AV_CODEC_ID_MLP: |
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case AV_CODEC_ID_TRUEHD: |
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case AV_CODEC_ID_DTS: |
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if (request_channel_layout & ~INT64_MIN) { |
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char *downmix_layout = av_mallocz(19); |
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if (!downmix_layout) |
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error("Failed memory allocation"); |
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av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN); |
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av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL); |
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} |
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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 (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; |
|
}
|
|
|