This extra code is ugly, better solution is welcome Fixes: Timeout Fixes: 45700/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6141847792123904
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/mov.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index c93e13c8cd..3d9e866d4e 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -5092,6 +5092,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) if (index_entry_pos > 0) prev_dts = sti->index_entries[index_entry_pos-1].timestamp; + if (flags & 0xF00) { for (i = 0; i < entries && !pb->eof_reached; i++) { unsigned sample_size = frag->size; int sample_flags = i ? frag->flags : first_sample_flags; @@ -5166,6 +5167,74 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) sc->nb_frames_for_fps ++; } } + } else { + unsigned sample_size = frag->size; + unsigned sample_duration = frag->duration; + + if (pts != AV_NOPTS_VALUE) { + dts = pts - sc->dts_shift - sc->time_offset; + av_log(c->fc, AV_LOG_DEBUG, + "pts %"PRId64" calculated dts %"PRId64 + " sc->dts_shift %d ctts.duration %d" + " sc->time_offset %"PRId64 + " flags & MOV_TRUN_SAMPLE_CTS %d\n", + pts, dts, + sc->dts_shift, 0, + sc->time_offset, 0); + } + + if (av_sat_add64(dts, sample_duration * entries) != dts + (uint64_t)sample_duration * entries) + return AVERROR_INVALIDDATA; + + for (i = 0; i < entries && !pb->eof_reached; i++) { + int sample_flags = i ? frag->flags : first_sample_flags; + int keyframe = 0; + int index_entry_flags = 0; + + if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) + keyframe = 1; + else + keyframe = + !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC | + MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES)); + if (keyframe) { + distance = 0; + index_entry_flags |= AVINDEX_KEYFRAME; + } + // Fragments can overlap in time. Discard overlapping frames after + // decoding. + if (prev_dts >= dts) + index_entry_flags |= AVINDEX_DISCARD_FRAME; + + sti->index_entries[index_entry_pos].pos = offset; + sti->index_entries[index_entry_pos].timestamp = dts; + sti->index_entries[index_entry_pos].size = sample_size; + sti->index_entries[index_entry_pos].min_distance = distance; + sti->index_entries[index_entry_pos].flags = index_entry_flags; + + sc->ctts_data[index_entry_pos].count = 1; + sc->ctts_data[index_entry_pos].duration = 0; + index_entry_pos++; + + av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " + "size %u, distance %d, keyframe %d\n", st->index, + index_entry_pos, offset, dts, sample_size, distance, keyframe); + distance++; + dts += sample_duration; + offset += sample_size; + sc->data_size += sample_size; + + if (sample_duration <= INT64_MAX - sc->duration_for_fps && + 1 <= INT_MAX - sc->nb_frames_for_fps + ) { + sc->duration_for_fps += sample_duration; + sc->nb_frames_for_fps ++; + } + } + + } + + if (frag_stream_info) frag_stream_info->next_trun_dts = dts + sc->time_offset; if (i < entries) { -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
