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Code Issues Releases Wiki Activity

removed dependency on liba52

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13609 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
nicodvb 2004-10-11 06:57:57 +00:00
parent 42315ddbb4
commit e4d9c107fc
1 changed files with 39 additions and 7 deletions
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46
libmpdemux/demux_ts.c
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@ -36,7 +36,6 @@
#include "bswap.h"
#include "../unrarlib.h"
#include "../liba52/a52.h"
#define TS_FEC_PACKET_SIZE 204
#define TS_PACKET_SIZE 188
@ -373,12 +372,48 @@ typedef struct {
off_t probe;
} tsdemux_init_t;
//stripped down version of a52_syncinfo() from liba52
//copyright belongs to Michel Lespinasse <walken@zoy.org> and Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
static int a52_framesize(uint8_t * buf)
{
int rate[] = { 32, 40, 48, 56, 64, 80, 96, 112,
128, 160, 192, 224, 256, 320, 384, 448,
512, 576, 640
};
uint8_t halfrate[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3};
int frmsizecod, bitrate, half;
if((buf[0] != 0x0b) || (buf[1] != 0x77)) /* syncword */
return 0;
if(buf[5] >= 0x60) /* bsid >= 12 */
return 0;
half = halfrate[buf[5] >> 3];
frmsizecod = buf[4] & 63;
if(frmsizecod >= 38)
return 0;
bitrate = rate[frmsizecod >> 1];
switch(buf[4] & 0xc0)
{
case 0: /* 48 KHz */
return 4 * bitrate;
case 0x40: /* 44.1 KHz */
return 2 * (320 * bitrate / 147 + (frmsizecod & 1));
case 0x80: /* 32 KHz */
return 6 * bitrate;
}
return 0;
}
#ifdef USE_LIBA52
//second stage: returns the count of A52 syncwords found
static int a52_check(char *buf, int len)
{
int cnt, frame_length, flags, sample_rate, bit_rate, ok;
int cnt, frame_length, ok;
cnt = ok = 0;
if(len < 8)
@ -388,7 +423,7 @@ static int a52_check(char *buf, int len)
{
if(buf[cnt] == 0x0B && buf[cnt+1] == 0x77)
{
frame_length = a52_syncinfo(&buf[cnt], &flags, &sample_rate, &bit_rate);
frame_length = a52_framesize(&buf[cnt]);
if(frame_length>=7 && frame_length<=3840)
{
cnt += frame_length;
@ -404,7 +439,6 @@ static int a52_check(char *buf, int len)
mp_msg(MSGT_DEMUXER, MSGL_V, "A52_CHECK(%d input bytes), found %d frame syncwords of %d bytes length\n", len, ok, frame_length);
return ok;
}
#endif
static off_t ts_detect_streams(demuxer_t *demuxer, tsdemux_init_t *param)
@ -436,7 +470,6 @@ static off_t ts_detect_streams(demuxer_t *demuxer, tsdemux_init_t *param)
pos = stream_tell(demuxer->stream);
if(ts_parse(demuxer, &es, tmp, 1))
{
#ifdef USE_LIBA52
//Non PES-aligned A52 audio may escape detection if PMT is not present;
//in this case we try to find at least 3 A52 syncwords
if((es.type == PES_PRIVATE1) && (! audio_found))
@ -454,7 +487,6 @@ static off_t ts_detect_streams(demuxer_t *demuxer, tsdemux_init_t *param)
}
}
}
#endif
is_audio = ((es.type == AUDIO_MP2) || (es.type == AUDIO_A52) || (es.type == AUDIO_LPCM_BE) || (es.type == AUDIO_AAC));
is_video = ((es.type == VIDEO_MPEG1) || (es.type == VIDEO_MPEG2) || (es.type == VIDEO_MPEG4));