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new mpeg helpers to build and send mpeg 1/2 ps/pes packets (used by some vo drivers)

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19141 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
ben 2006-07-19 21:46:06 +00:00
parent c885bca73c
commit 5e2623cb49
3 changed files with 327 additions and 0 deletions

1
libmpcodecs/Makefile

@ -310,6 +310,7 @@ SRCS=$(AUDIO_SRCS) \
$(VIDEO_SRCS) \
$(VFILTER_SRCS) \
$(NATIVE_SRCS) \
mpeg_packetizer.c \
img_format.c \
OBJS=$(SRCS:.c=.o)

278
libmpcodecs/mpeg_packetizer.c Normal file

@ -0,0 +1,278 @@
/*
* Copyright (C) 2006 Benjamin Zores
* Set of helper routines for building MPEG 1/2 PS/PES packets.
*
* Based on various code bororwed from vo_mpegpes/vo_dxr2 :
* (C) 2000 Ralph Metzler <ralph@convergence.de>
* Marcus Metzler <marcus@convergence.de>
* Gerard Lantau
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <unistd.h>
#include <string.h>
#include <inttypes.h>
#include "mp_msg.h"
#include "mpeg_packetizer.h"
#define PES_MAX_SIZE 2048
static unsigned char pes_header[PES_MAX_SIZE];
static unsigned char ps_header[] = {
0x00, 0x00, 0x01, 0xba, 0x44, 0x00, 0x04, 0x00,
0x04, 0x01, 0x01, 0x86, 0xa3, 0xf8
};
/* Send MPEG 1 PES packet */
int
send_mpeg1_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len))
{
int ptslen = pts ? 5 : 1;
int n = 0;
mp_msg (MSGT_HEADER, MSGL_DBG2,
"MPEG1 PES 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] = id >> 8;
pes_header[3] = id & 255;
while (len > 0)
{
int payload_size = len; /* data + PTS */
if (6 + ptslen + payload_size > PES_MAX_SIZE)
payload_size = PES_MAX_SIZE - (6 + ptslen);
/* construct PES header: packetsize */
pes_header[4] = (ptslen + payload_size) >> 8;
pes_header[5] = (ptslen + payload_size) & 255;
if (ptslen == 5)
{
int x;
/* presentation time stamp */
x = (0x02 << 4) | (((pts >> 30) & 0x07) << 1) | 1;
pes_header[6] = x;
x = ((((pts >> 15) & 0x7fff) << 1) | 1);
pes_header[7] = x >> 8;
pes_header[8] = x & 255;
x = (((pts & 0x7fff) << 1) | 1);
pes_header[9] = x >> 8;
pes_header[10] = x & 255;
}
else
{
/* stuffing and header bits */
pes_header[6] = 0x0f;
}
memcpy (&pes_header[6 + ptslen], data, payload_size);
n += my_write (pes_header, 6 + ptslen + payload_size);
len -= payload_size;
data += payload_size;
ptslen = 1; /* store PTS only once, at first packet! */
}
return n;
}
/* Send MPEG 1 PS packet */
int
send_mpeg1_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len))
{
my_write (ps_header, sizeof (ps_header));
return send_mpeg1_pes_packet (data, len, id, pts, my_write);
}
/* Send MPEG 2 PES packet */
int
send_mpeg2_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len))
{
int ptslen = 5;
int n = 0;
mp_msg (MSGT_HEADER, MSGL_DBG2,
"MPEG2 PES 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] = 0x01;
pes_header[3] = id; /* stream id */
while (len > 0)
{
int payload_size = len; /* data + PTS */
if (9 + ptslen + payload_size > PES_MAX_SIZE)
payload_size = PES_MAX_SIZE - (6 + ptslen);
/* construct PES header: packetize */
pes_header[4] = (3 + ptslen + payload_size) >> 8;
pes_header[5] = (3 + ptslen + payload_size) & 255;
pes_header[6] = 0x81;
if (ptslen)
{
int x;
pes_header[7] = 0x80;
pes_header[8] = ptslen;
/* 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;
}
else
{
pes_header[7] = 0x00;
pes_header[8] = 0x00;
}
my_write (pes_header, 9 + ptslen);
n += my_write (data, payload_size);
len -= payload_size;
data += payload_size;
ptslen = 0; /* store PTS only once, at first packet! */
}
return n;
}
/* Send MPEG 2 PS packet */
int
send_mpeg2_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len))
{
my_write (ps_header, sizeof (ps_header));
return send_mpeg2_pes_packet (data, len, id, pts, my_write);
}
/* Send MPEG LPCM packet */
int
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;
}

48
libmpcodecs/mpeg_packetizer.h Normal file

@ -0,0 +1,48 @@
/*
* Copyright (C) 2006 Benjamin Zores
* Set of helper routines for building MPEG 1/2 PS/PES packets.
*
* Based on various code bororwed from vo_mpegpes/vo_dxr2 :
* (C) 2000 Ralph Metzler <ralph@convergence.de>
* Marcus Metzler <marcus@convergence.de>
* Gerard Lantau
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _MPEG_PACKETIZER_H_
#define _MPEG_PACKETIZER_H_
/* Send MPEG 1 PES packet */
int send_mpeg1_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len));
/* Send MPEG 1 PS packet */
int send_mpeg1_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len));
/* Send MPEG 2 PES packet */
int send_mpeg2_pes_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len));
/* Send MPEG 2 PS packet */
int send_mpeg2_ps_packet (unsigned char *data, int len, int id, uint64_t pts,
int my_write (unsigned char *data, int len));
/* Send MPEG LPCM packet */
int 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));
#endif /* _MPEG_PACKETIZER_H_ */