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write DTS, based on patch by Luca Abeni, lucabe72 email it

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Originally committed as revision 8196 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2007-03-02 21:47:24 +00:00
parent dd9bdeb9f3
commit 700b971156
1 changed files with 44 additions and 25 deletions
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69
libavformat/mpegtsenc.c
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@ -143,6 +143,7 @@ typedef struct MpegTSWriteStream {
int cc;
int payload_index;
int64_t payload_pts;
int64_t payload_dts;
uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
} MpegTSWriteStream;
@ -396,6 +397,7 @@ static int mpegts_write_header(AVFormatContext *s)
ts_st->service = service;
ts_st->pid = DEFAULT_START_PID + i;
ts_st->payload_pts = AV_NOPTS_VALUE;
ts_st->payload_dts = AV_NOPTS_VALUE;
/* update PCR pid by using the first video stream */
if (st->codec->codec_type == CODEC_TYPE_VIDEO &&
service->pcr_pid == 0x1fff)
@ -460,15 +462,29 @@ static void retransmit_si_info(AVFormatContext *s)
}
}
static void write_pts(uint8_t *q, int fourbits, int64_t pts)
{
int val;
val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
*q++ = val;
val = (((pts >> 15) & 0x7fff) << 1) | 1;
*q++ = val >> 8;
*q++ = val;
val = (((pts) & 0x7fff) << 1) | 1;
*q++ = val >> 8;
*q++ = val;
}
/* NOTE: pes_data contains all the PES packet */
static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
const uint8_t *payload, int payload_size,
int64_t pts)
int64_t pts, int64_t dts)
{
MpegTSWriteStream *ts_st = st->priv_data;
uint8_t buf[TS_PACKET_SIZE];
uint8_t *q;
int val, is_start, len, header_len, write_pcr, private_code;
int val, is_start, len, header_len, write_pcr, private_code, flags;
int afc_len, stuffing_len;
int64_t pcr = -1; /* avoid warning */
@ -527,13 +543,19 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
private_code = 0x20;
}
}
if (pts != AV_NOPTS_VALUE)
header_len = 8;
else
header_len = 3;
header_len = 0;
flags = 0;
if (pts != AV_NOPTS_VALUE) {
header_len += 5;
flags |= 0x80;
}
if (dts != AV_NOPTS_VALUE) {
header_len += 5;
flags |= 0x40;
}
len = payload_size + header_len + 3;
if (private_code != 0)
header_len++;
len = payload_size + header_len;
len++;
*q++ = len >> 8;
*q++ = len;
val = 0x80;
@ -541,21 +563,15 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
if (st->codec->codec_type == CODEC_TYPE_SUBTITLE)
val |= 0x04;
*q++ = val;
*q++ = flags;
*q++ = header_len;
if (pts != AV_NOPTS_VALUE) {
*q++ = 0x80; /* PTS only */
*q++ = 0x05; /* header len */
val = (0x02 << 4) |
(((pts >> 30) & 0x07) << 1) | 1;
*q++ = val;
val = (((pts >> 15) & 0x7fff) << 1) | 1;
*q++ = val >> 8;
*q++ = val;
val = (((pts) & 0x7fff) << 1) | 1;
*q++ = val >> 8;
*q++ = val;
} else {
*q++ = 0x00;
*q++ = 0x00;
write_pts(q, flags >> 6, pts);
q += 5;
}
if (dts != AV_NOPTS_VALUE) {
write_pts(q, 1, dts);
q += 5;
}
if (private_code != 0)
*q++ = private_code;
@ -607,7 +623,7 @@ static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
/* for subtitle, a single PES packet must be generated */
mpegts_write_pes(s, st, buf, size, pkt->pts);
mpegts_write_pes(s, st, buf, size, pkt->pts, AV_NOPTS_VALUE);
return 0;
}
@ -622,10 +638,13 @@ static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
ts_st->payload_index += len;
if (ts_st->payload_pts == AV_NOPTS_VALUE)
ts_st->payload_pts = pkt->pts;
if (ts_st->payload_dts == AV_NOPTS_VALUE)
ts_st->payload_dts = pkt->dts;
if (ts_st->payload_index >= max_payload_size) {
mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
ts_st->payload_pts);
ts_st->payload_pts, ts_st->payload_dts);
ts_st->payload_pts = AV_NOPTS_VALUE;
ts_st->payload_dts = AV_NOPTS_VALUE;
ts_st->payload_index = 0;
}
}
@ -646,7 +665,7 @@ static int mpegts_write_end(AVFormatContext *s)
ts_st = st->priv_data;
if (ts_st->payload_index > 0) {
mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
ts_st->payload_pts);
ts_st->payload_pts, ts_st->payload_dts);
}
}
put_flush_packet(&s->pb);