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final cleanup: implemented send_mpeg_pes_packet() and send_mpeg_lpcm_packet() using new send_mpeg_pes_packet_ll()

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19248 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
nicodvb 2006-07-29 18:39:07 +00:00
parent dbda0fb631
commit 92c2148d7e
1 changed files with 29 additions and 97 deletions
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126
libmpdemux/mpeg_packetizer.c
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@ -45,9 +45,10 @@ static unsigned char ps1_header[] = {
};
/* Send MPEG <type> PES packet */
int
send_mpeg_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
int type, int my_write (unsigned char *data, int len))
static int
send_mpeg_pes_packet_ll(unsigned char *data, int len, int id, uint64_t pts,
int type, unsigned char *header, int header_len,
int align4, int my_write (unsigned char *data, int len))
{
int ptslen = (pts ? 5 : 0);
int n = 0;
@ -71,11 +72,13 @@ send_mpeg_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
hdr = 3;
else
hdr = (ptslen ? 0 : 1);
if (6 + hdr + ptslen + payload_size > PES_MAX_SIZE)
payload_size = PES_MAX_SIZE - 6 - hdr - ptslen;
if (6 + hdr + ptslen + payload_size + header_len > PES_MAX_SIZE)
payload_size = PES_MAX_SIZE - 6 - hdr - ptslen - header_len;
if(align4)
payload_size &= ~3;
/* construct PES header: packetize */
plen = payload_size + hdr + ptslen;
plen = payload_size + hdr + ptslen + header_len;
pes_header[4] = plen >> 8;
pes_header[5] = plen & 255;
idx = 6;
@ -114,6 +117,12 @@ send_mpeg_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
else
pes_header[idx++] = 0x0f;
}
if(header_len)
{
memcpy(&pes_header[idx], header, header_len);
idx += header_len;
}
my_write (pes_header, idx);
n = my_write (data, payload_size);
@ -121,14 +130,24 @@ send_mpeg_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
len -= n;
data += n;
ptslen = 0; /* store PTS only once, at first packet! */
if(align4 && len < 4)
break;
}
return n;
}
int
send_mpeg_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
int type, int my_write (unsigned char *data, int len))
{
send_mpeg_pes_packet_ll(data, len, id, pts, type, NULL, 0, 0, my_write);
}
/* Send MPEG <type> PS packet */
int
send_mpeg_ps_packet (unsigned char *data, int len, int id, uint64_t pts, int type,
send_mpeg_ps_packet(unsigned char *data, int len, int id, uint64_t pts, int type,
int my_write (unsigned char *data, int len))
{
if(type == 2)
@ -140,97 +159,10 @@ send_mpeg_ps_packet (unsigned char *data, int len, int id, uint64_t pts, int typ
/* Send MPEG 2 LPCM packet */
int
send_mpeg_lpcm_packet (unsigned char* data, int len,
send_mpeg_lpcm_packet(unsigned char* data, int len,
int id, uint64_t pts, int freq_id,
int my_write (unsigned char *data, int len))
{
int ptslen = pts ? 5 : 0;
int n = 0;
mp_msg (MSGT_HEADER, MSGL_DBG2,
"MPEG LPCM packet: 0x%x => %lu \n", id, pts);
memset (pes_header, '\0', PES_MAX_SIZE);
/* startcode */
pes_header[0] = 0;
pes_header[1] = 0;
pes_header[2] = 1;
pes_header[3] = 0xBD; /* stream id */
while (len >= 4)
{
int payload_size = PES_MAX_SIZE - 6 - 20; /* max possible data len */
if( payload_size > len)
payload_size = len;
payload_size &= ~3; /* align! */
/* packetsize */
pes_header[4] = (payload_size + 3 + ptslen + 7) >> 8;
pes_header[5] = (payload_size + 3 + ptslen + 7) & 255;
/* stuffing */
/* TTCCxxxx CC=css TT=type: 1=STD 0=mpeg1 2=vob */
pes_header[6] = 0x81;
/* FFxxxxxx FF=pts flags=2 vs 0 */
pes_header[7] = ptslen ? 0x80 : 0;
/* header length */
pes_header[8] = ptslen;
if (ptslen)
{
int x;
/* presentation time stamp */
x = (0x02 << 4) | (((pts >> 30) & 0x07) << 1) | 1;
pes_header[9] = x;
x = ((((pts >> 15) & 0x7fff) << 1) | 1);
pes_header[10] = x >> 8;
pes_header[11] = x &255;
x = (((pts & 0x7fff) << 1) | 1);
pes_header[12] = x >> 8;
pes_header[13] = x & 255;
}
/* ============ LPCM header: (7 bytes) ================= */
/* Info by mocm@convergence.de */
/* ID */
pes_header[ptslen + 9] = id;
/* number of frames */
pes_header[ptslen + 10] = 0x07;
/* first acces unit pointer, i.e. start of audio frame */
pes_header[ptslen + 11] = 0x00;
pes_header[ptslen + 12] = 0x04;
/* audio emphasis on-off 1 bit */
/* audio mute on-off 1 bit */
/* reserved 1 bit */
/* audio frame number 5 bit */
pes_header[ptslen + 13] = 0x0C;
/* quantization word length 2 bit */
/* audio sampling frequency (48khz = 0, 96khz = 1) 2 bit */
/* reserved 1 bit */
/* number of audio channels - 1 (e.g. stereo = 1) 3 bit */
pes_header[ptslen + 14] = 1 | (freq_id << 4);
/* dynamic range control (0x80 if off) */
pes_header [ptslen + 15] = 0x80;
memcpy (&pes_header[6 + 3 + ptslen + 7], data, payload_size);
n += my_write (pes_header, 6 + 3 + ptslen + 7 + payload_size);
len -= payload_size;
data += payload_size;
ptslen = 0; /* store PTS only once, at first packet! */
}
return n;
unsigned char header[7] = {0xA0, 0x07, 0x00, 0x04, 0x0C, 1 | (freq_id << 4), 0x80};
send_mpeg_pes_packet_ll(data, len, 0xBD, pts, 2, header, sizeof(header), 1, my_write);
}