avformat/mov: Only read the primary item for AVIF

Update the still AVIF parser to only read the primary item. With this
patch, AVIF still images with exif/icc/alpha channel will no longer
fail to parse.

For example, this patch enables parsing of files in:
https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles/Microsoft

Adding two fate tests:
1) demuxing of still image with 1 item - this test will pass regardless
   of this patch.
2) demuxing of still image with 2 items - this test will fail without
   this patch and will pass with patch applied.

Partially fixes trac ticket #7621

Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: James Zern <jzern@google.com>
This commit is contained in:
Vignesh Venkatasubramanian 2022-06-28 11:56:20 -07:00 committed by James Zern
parent 42d75f2faa
commit be4d1caad4
5 changed files with 57 additions and 20 deletions

View File

@ -317,6 +317,7 @@ typedef struct MOVContext {
uint32_t mfra_size;
uint32_t max_stts_delta;
int is_still_picture_avif;
int primary_item_id;
} MOVContext;
int ff_mp4_read_descr_len(AVIOContext *pb);

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@ -7470,6 +7470,13 @@ static int rb_size(AVIOContext *pb, uint64_t* value, int size)
return size;
}
static int mov_read_pitm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
avio_rb32(pb); // version & flags.
c->primary_item_id = avio_rb16(pb);
return atom.size;
}
static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int version, offset_size, length_size, base_offset_size, index_size;
@ -7526,34 +7533,25 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return AVERROR_PATCHWELCOME;
}
item_count = (version < 2) ? avio_rb16(pb) : avio_rb32(pb);
if (item_count > 1) {
// For still AVIF images, we only support one item. Second item will
// generally be found for AVIF images with alpha channel. We don't
// support them as of now.
av_log(c->fc, AV_LOG_ERROR, "iloc: item_count > 1 not supported.\n");
return AVERROR_PATCHWELCOME;
}
// Populate the necessary fields used by mov_build_index.
sc->stsc_count = item_count;
sc->stsc_data = av_malloc_array(item_count, sizeof(*sc->stsc_data));
sc->stsc_count = 1;
sc->stsc_data = av_malloc_array(1, sizeof(*sc->stsc_data));
if (!sc->stsc_data)
return AVERROR(ENOMEM);
sc->stsc_data[0].first = 1;
sc->stsc_data[0].count = 1;
sc->stsc_data[0].id = 1;
sc->chunk_count = item_count;
sc->chunk_offsets =
av_malloc_array(item_count, sizeof(*sc->chunk_offsets));
sc->chunk_count = 1;
sc->chunk_offsets = av_malloc_array(1, sizeof(*sc->chunk_offsets));
if (!sc->chunk_offsets)
return AVERROR(ENOMEM);
sc->sample_count = item_count;
sc->sample_sizes =
av_malloc_array(item_count, sizeof(*sc->sample_sizes));
sc->sample_count = 1;
sc->sample_sizes = av_malloc_array(1, sizeof(*sc->sample_sizes));
if (!sc->sample_sizes)
return AVERROR(ENOMEM);
sc->stts_count = item_count;
sc->stts_data = av_malloc_array(item_count, sizeof(*sc->stts_data));
sc->stts_count = 1;
sc->stts_data = av_malloc_array(1, sizeof(*sc->stts_data));
if (!sc->stts_data)
return AVERROR(ENOMEM);
sc->stts_data[0].count = 1;
@ -7561,7 +7559,7 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sc->stts_data[0].duration = 0;
for (int i = 0; i < item_count; i++) {
(version < 2) ? avio_rb16(pb) : avio_rb32(pb); // item_id;
int item_id = (version < 2) ? avio_rb16(pb) : avio_rb32(pb);
if (version > 0)
avio_rb16(pb); // construction_method.
avio_rb16(pb); // data_reference_index.
@ -7577,8 +7575,10 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
if (rb_size(pb, &extent_offset, offset_size) < 0 ||
rb_size(pb, &extent_length, length_size) < 0)
return AVERROR_INVALIDDATA;
sc->sample_sizes[0] = extent_length;
sc->chunk_offsets[0] = base_offset + extent_offset;
if (item_id == c->primary_item_id) {
sc->sample_sizes[0] = extent_length;
sc->chunk_offsets[0] = base_offset + extent_offset;
}
}
}
@ -7696,6 +7696,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('S','A','N','D'), mov_read_SAND }, /* non diegetic audio box */
{ MKTAG('i','l','o','c'), mov_read_iloc },
{ MKTAG('p','c','m','C'), mov_read_pcmc }, /* PCM configuration box */
{ MKTAG('p','i','t','m'), mov_read_pitm },
{ 0, NULL }
};

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@ -17,6 +17,10 @@ FATE_MOV = fate-mov-3elist \
fate-mov-bbi-elst-starts-b \
fate-mov-neg-firstpts-discard-frames \
fate-mov-stream-shorter-than-movie \
# FIXME: Uncomment these two lines once the test files are uploaded to the fate
# server.
# fate-mov-avif-demux-still-image-1-item \
# fate-mov-avif-demux-still-image-multiple-items \
FATE_MOV_FFPROBE = fate-mov-neg-firstpts-discard \
fate-mov-neg-firstpts-discard-vorbis \
@ -138,6 +142,15 @@ FATE_MOV_FFMPEG_FFPROBE-$(call TRANSCODE, TTML SUBRIP, MP4 MOV, SRT_DEMUXER TTML
fate-mov-mp4-ttml-stpp: CMD = transcode srt $(TARGET_SAMPLES)/sub/SubRip_capability_tester.srt mp4 "-map 0:s -c:s ttml -time_base:s 1:1000" "-map 0 -c copy" "-of json -show_entries packet:stream=index,codec_type,codec_tag_string,codec_tag,codec_name,time_base,start_time,duration_ts,duration,nb_frames,nb_read_packets:stream_tags"
fate-mov-mp4-ttml-dfxp: CMD = transcode srt $(TARGET_SAMPLES)/sub/SubRip_capability_tester.srt mp4 "-map 0:s -c:s ttml -time_base:s 1:1000 -tag:s dfxp -strict unofficial" "-map 0 -c copy" "-of json -show_entries packet:stream=index,codec_type,codec_tag_string,codec_tag,codec_name,time_base,start_time,duration_ts,duration,nb_frames,nb_read_packets:stream_tags"
# FIXME: Uncomment these two tests once the test files are uploaded to the fate
# server.
# avif demuxing - still image with 1 item.
#fate-mov-avif-demux-still-image-1-item: CMD = framemd5 -i $(TARGET_SAMPLES)/avif/still_image.avif -c:v copy
# avif demuxing - still image with multiple items. only the primary item will be
# parsed.
#fate-mov-avif-demux-still-image-multiple-items: CMD = framemd5 -i $(TARGET_SAMPLES)/avif/still_image_exif.avif -c:v copy
# Resulting remux should have:
# 1. first audio stream with AV_DISPOSITION_HEARING_IMPAIRED
# 2. second audio stream with AV_DISPOSITION_VISUAL_IMPAIRED | DESCRIPTIONS

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@ -0,0 +1,11 @@
#format: frame checksums
#version: 2
#hash: MD5
#extradata 0, 13, b52ae298d37128862ef1918cf916239c
#tb 0: 1/1
#media_type 0: video
#codec_id 0: av1
#dimensions 0: 352x288
#sar 0: 1/1
#stream#, dts, pts, duration, size, hash
0, 0, 0, 1, 36265, 235b0c6e389c4084845981e08d60db04

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@ -0,0 +1,11 @@
#format: frame checksums
#version: 2
#hash: MD5
#extradata 0, 13, b52ae298d37128862ef1918cf916239c
#tb 0: 1/1
#media_type 0: video
#codec_id 0: av1
#dimensions 0: 352x288
#sar 0: 1/1
#stream#, dts, pts, duration, size, hash
0, 0, 0, 1, 36265, 235b0c6e389c4084845981e08d60db04