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compute pcr more accurately, regression tests need update

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Originally committed as revision 16596 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-01-14 02:20:26 +00:00
parent c91662ce83
commit b5931348bc
1 changed files with 34 additions and 26 deletions
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60
libavformat/mpegtsenc.c
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@ -36,9 +36,35 @@ typedef struct MpegTSSection {
void *opaque;
} MpegTSSection;
typedef struct MpegTSService {
MpegTSSection pmt; /* MPEG2 pmt table context */
int sid; /* service ID */
char *name;
char *provider_name;
int pcr_pid;
int pcr_packet_count;
int pcr_packet_freq;
} MpegTSService;
typedef struct MpegTSWrite {
MpegTSSection pat; /* MPEG2 pat table */
MpegTSSection sdt; /* MPEG2 sdt table context */
MpegTSService **services;
int sdt_packet_count;
int sdt_packet_freq;
int pat_packet_count;
int pat_packet_freq;
int nb_services;
int onid;
int tsid;
uint64_t cur_pcr;
int mux_rate;
} MpegTSWrite;
/* NOTE: 4 bytes must be left at the end for the crc32 */
static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
{
MpegTSWrite *ts = ((AVFormatContext*)s->opaque)->priv_data;
unsigned int crc;
unsigned char packet[TS_PACKET_SIZE];
const unsigned char *buf_ptr;
@ -80,6 +106,8 @@ static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
buf_ptr += len1;
len -= len1;
ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
}
}
@ -149,29 +177,6 @@ typedef struct MpegTSWriteStream {
uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
} MpegTSWriteStream;
typedef struct MpegTSService {
MpegTSSection pmt; /* MPEG2 pmt table context */
int sid; /* service ID */
char *name;
char *provider_name;
int pcr_pid;
int pcr_packet_count;
int pcr_packet_freq;
} MpegTSService;
typedef struct MpegTSWrite {
MpegTSSection pat; /* MPEG2 pat table */
MpegTSSection sdt; /* MPEG2 sdt table context */
MpegTSService **services;
int sdt_packet_count;
int sdt_packet_freq;
int pat_packet_count;
int pat_packet_freq;
int nb_services;
int onid;
int tsid;
} MpegTSWrite;
static void mpegts_write_pat(AVFormatContext *s)
{
MpegTSWrite *ts = s->priv_data;
@ -439,6 +444,8 @@ static int mpegts_write_header(AVFormatContext *s)
total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
#endif
ts->mux_rate = total_bit_rate;
/* write info at the start of the file, so that it will be fast to
find them */
mpegts_write_sdt(s);
@ -497,6 +504,7 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
int64_t pts, int64_t dts)
{
MpegTSWriteStream *ts_st = st->priv_data;
MpegTSWrite *ts = s->priv_data;
uint8_t buf[TS_PACKET_SIZE];
uint8_t *q;
int val, is_start, len, header_len, write_pcr, private_code, flags;
@ -514,9 +522,6 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
ts_st->service->pcr_packet_freq) {
ts_st->service->pcr_packet_count = 0;
write_pcr = 1;
/* XXX: this is incorrect, but at least we have a PCR
value */
pcr = pts;
}
}
@ -531,6 +536,8 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
*q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
ts_st->cc = (ts_st->cc + 1) & 0xf;
if (write_pcr) {
// add 11, pcr references the last byte of program clock reference base
pcr = ts->cur_pcr + (4+7)*8*90000LL / ts->mux_rate;
*q++ = 7; /* AFC length */
*q++ = 0x10; /* flags: PCR present */
*q++ = pcr >> 25;
@ -651,6 +658,7 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
payload += len;
payload_size -= len;
put_buffer(s->pb, buf, TS_PACKET_SIZE);
ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
}
put_flush_packet(s->pb);
}