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w64dec: support metadata (summarylist guid)

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2012-12-29 15:00:50 +00:00
parent d4211c4722
commit 14d50c19dc
3 changed files with 70 additions and 20 deletions
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3
libavformat/w64.c
View File

@ -31,3 +31,6 @@ const uint8_t ff_w64_guid_fmt [16] = { 'f', 'm', 't', ' ',
const uint8_t ff_w64_guid_data[16] = { 'd', 'a', 't', 'a',
0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
const uint8_t ff_w64_guid_summarylist[16] = { 0xBC, 0x94, 0x5F, 0x92,
0x5A, 0x52, 0xD2, 0x11, 0x86, 0xDC, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };

1
libavformat/w64.h
View File

@ -25,5 +25,6 @@ extern const uint8_t ff_w64_guid_riff[16];
extern const uint8_t ff_w64_guid_wave[16];
extern const uint8_t ff_w64_guid_fmt [16];
extern const uint8_t ff_w64_guid_data[16];
extern const uint8_t ff_w64_guid_summarylist[16];
#endif /* AVFORMAT_W64_H */

86
libavformat/wavdec.c
View File

@ -552,7 +552,7 @@ static int w64_probe(AVProbeData *p)
static int w64_read_header(AVFormatContext *s)
{
int64_t size;
int64_t size, data_ofs = 0;
AVIOContext *pb = s->pb;
WAVDemuxContext *wav = s->priv_data;
AVStream *st;
@ -572,34 +572,80 @@ static int w64_read_header(AVFormatContext *s)
return -1;
}
size = find_guid(pb, ff_w64_guid_fmt);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
return -1;
}
wav->w64 = 1;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
/* subtract chunk header size - normal wav file doesn't count it */
ret = ff_get_wav_header(pb, st->codec, size - 24);
if (ret < 0)
return ret;
avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
while (!url_feof(pb)) {
if (avio_read(pb, guid, 16) != 16)
break;
size = avio_rl64(pb);
if (size <= 24 || INT64_MAX - size < avio_tell(pb))
return AVERROR_INVALIDDATA;
if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
/* subtract chunk header size - normal wav file doesn't count it */
ret = ff_get_wav_header(pb, st->codec, size - 24);
if (ret < 0)
return ret;
avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
} else if (!memcmp(guid, ff_w64_guid_data, 16)) {
wav->data_end = avio_tell(pb) + size - 24;
data_ofs = avio_tell(pb);
if (!pb->seekable)
break;
avio_skip(pb, size - 24);
} else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
int64_t start, end, cur;
uint32_t count, chunk_size, i;
start = avio_tell(pb);
end = start + size;
count = avio_rl32(pb);
for (i = 0; i < count; i++) {
char chunk_key[5], *value;
if (url_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
break;
chunk_key[4] = 0;
avio_read(pb, chunk_key, 4);
chunk_size = avio_rl32(pb);
value = av_mallocz(chunk_size + 1);
if (!value)
return AVERROR(ENOMEM);
ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
avio_skip(pb, chunk_size - ret);
av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
}
avio_skip(pb, end - avio_tell(pb));
} else {
av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
avio_skip(pb, size - 24);
}
}
if (!data_ofs)
return AVERROR_EOF;
ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
handle_stream_probing(st);
st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
size = find_guid(pb, ff_w64_guid_data);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "could not find data guid\n");
return -1;
}
wav->data_end = avio_tell(pb) + size - 24;
wav->w64 = 1;
avio_seek(pb, data_ofs, SEEK_SET);
return 0;
}