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mpegts muxer: DVB subtitles multiple languages support 

* restore multiple languages data from extradata to PMT table
* setting correctly hearing empaired subtitling type

Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
mrlika 2014-02-13 02:00:24 +02:00 committed by Michael Niedermayer
parent 13aec744c2
commit af786236cc
1 changed files with 36 additions and 13 deletions
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49
libavformat/mpegtsenc.c
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@ -377,20 +377,43 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
/* The descriptor tag. subtitling_descriptor */
*q++ = 0x59;
*q++ = 8;
*q++ = language[0];
*q++ = language[1];
*q++ = language[2];
*q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
if(st->codec->extradata_size == 4) {
memcpy(q, st->codec->extradata, 4);
q += 4;
} else {
put16(&q, 1); /* page id */
put16(&q, 1); /* ancillary page id */
uint8_t *len_ptr;
int extradata_copied = 0;
*q++ = 0x59; /* subtitling_descriptor */
len_ptr = q++;
while (strlen(language) >= 3 && (sizeof(data) - (q - data)) >= 8) { /* 8 bytes per DVB subtitle substream data */
*q++ = *language++;
*q++ = *language++;
*q++ = *language++;
/* Skip comma */
if (*language != '\0')
language++;
if (st->codec->extradata_size - extradata_copied >= 5) {
*q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
extradata_copied += 5;
q += 4;
} else {
/* subtitling_type:
* 0x10 - normal with no monitor aspect ratio criticality
* 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
*q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
/* support of old 4-byte extradata format */
memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
extradata_copied += 4;
q += 4;
} else {
put16(&q, 1); /* composition_page_id */
put16(&q, 1); /* ancillary_page_id */
}
}
}
*len_ptr = q - len_ptr - 1;
} else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
uint8_t *len_ptr = NULL;
int extradata_copied = 0;