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Parse 'bext' metadata in the wav demuxer
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
parent
40612f2601
commit
7e5cb2ef51
@ -204,6 +204,86 @@ static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
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return 0;
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return 0;
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}
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}
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static inline int wav_parse_bext_string(AVFormatContext *s, const char *key, int length)
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{
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char temp[257];
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int ret;
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if ((ret = avio_read(s->pb, temp, length)) < 0)
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return ret;
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temp[length] = 0;
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if (strlen(temp))
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return av_metadata_set2(&s->metadata, key, temp, 0);
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return 0;
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}
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static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
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{
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char temp[131], *coding_history;
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int ret, x;
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uint64_t time_reference;
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int64_t umid_parts[8], umid_mask = 0;
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if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
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(ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
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(ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
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(ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
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(ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
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return ret;
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time_reference = avio_rl64(s->pb);
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snprintf(temp, sizeof(temp), "%lu", time_reference);
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if ((ret = av_metadata_set2(&s->metadata, "time_reference", temp, 0)) < 0)
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return ret;
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/* check if version is >= 1, in which case an UMID may be present */
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if (avio_rl16(s->pb) >= 1) {
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for (x = 0; x < 8; x++)
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umid_mask |= umid_parts[x] = avio_rb64(s->pb);
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if (umid_mask) {
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/* the string formatting below is per SMPTE 330M-2004 Annex C */
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if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) {
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/* basic UMID */
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snprintf(temp, sizeof(temp), "0x%016lX%016lX%016lX%016lX",
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umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]);
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} else {
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/* extended UMID */
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snprintf(temp, sizeof(temp), "0x%016lX%016lX%016lX%016lX%016lX%016lX%016lX%016lX",
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umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3],
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umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]);
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}
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if ((ret = av_metadata_set2(&s->metadata, "umid", temp, 0)) < 0)
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return ret;
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}
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avio_skip(s->pb, 190);
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} else
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avio_skip(s->pb, 254);
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if (size > 602) {
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/* CodingHistory present */
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size -= 602;
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if (!(coding_history = av_malloc(size+1)))
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return AVERROR(ENOMEM);
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if ((ret = avio_read(s->pb, coding_history, size)) < 0)
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return ret;
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coding_history[size] = 0;
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if ((ret = av_metadata_set2(&s->metadata, "coding_history", coding_history,
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AV_METADATA_DONT_STRDUP_VAL)) < 0)
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return ret;
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}
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return 0;
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}
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/* wav input */
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/* wav input */
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static int wav_read_header(AVFormatContext *s,
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static int wav_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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AVFormatParameters *ap)
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@ -295,6 +375,10 @@ static int wav_read_header(AVFormatContext *s,
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if(!sample_count)
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if(!sample_count)
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sample_count = avio_rl32(pb);
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sample_count = avio_rl32(pb);
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break;
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break;
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case MKTAG('b','e','x','t'):
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if ((ret = wav_parse_bext_tag(s, size)) < 0)
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return ret;
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break;
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}
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}
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avio_seek(pb, next_tag_ofs, SEEK_SET);
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avio_seek(pb, next_tag_ofs, SEEK_SET);
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}
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}
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