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More enhancements:

Browse source 
- added getopt_long to parse the command line options
  - added -D (--device) option
  - added -q (--quiet) option
  - added -I (--iec958) option
  - added AC3 to IEC958 encapsulation code (not tested)
  - addec xrun detection and restart
This commit is contained in:
Jaroslav Kysela 2001-04-22 12:04:00 +00:00
parent 3f541f6ba8
commit 97a55787e6
13 changed files with 425 additions and 120 deletions
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77
ac3dec/libac3/parse.c
View file

@ -85,13 +85,42 @@ static const struct frmsize_s frmsizecod_tbl[64] =
{ 640 ,{1280 ,1394 ,1920 } }
};
void
parse_syncinfo_data(syncinfo_t *syncinfo, uint_8 *data)
{
// Get the sampling rate
syncinfo->fscod = (data[2] >> 6) & 0x3;
if(syncinfo->fscod == 3)
{
//invalid sampling rate code
error_flag = 1;
return;
}
else if(syncinfo->fscod == 2)
syncinfo->sampling_rate = 32000;
else if(syncinfo->fscod == 1)
syncinfo->sampling_rate = 44100;
else
syncinfo->sampling_rate = 48000;
// Get the frame size code
syncinfo->frmsizecod = data[2] & 0x3f;
// Calculate the frame size and bitrate
syncinfo->frame_size =
frmsizecod_tbl[syncinfo->frmsizecod].frm_size[syncinfo->fscod];
syncinfo->bit_rate = frmsizecod_tbl[syncinfo->frmsizecod].bit_rate;
}
/* Parse a syncinfo structure, minus the sync word */
void
parse_syncinfo(syncinfo_t *syncinfo)
{
uint_32 tmp = 0;
uint_8 data[3];
uint_16 sync_word = 0;
uint_32 time_out = 1<<16;
//
// Find a ac3 sync frame. Time out if we read 64k without finding
@ -109,34 +138,11 @@ parse_syncinfo(syncinfo_t *syncinfo)
// We need to read in the entire syncinfo struct (0x0b77 + 24 bits)
// in order to determine how big the frame is
//
tmp = (tmp << 8) + bitstream_get_byte();
tmp = (tmp << 8) + bitstream_get_byte();
tmp = (tmp << 8) + bitstream_get_byte();
// Get the sampling rate
syncinfo->fscod = (tmp >> 6) & 0x3;
if(syncinfo->fscod == 3)
{
//invalid sampling rate code
error_flag = 1;
return;
}
else if(syncinfo->fscod == 2)
syncinfo->sampling_rate = 32000;
else if(syncinfo->fscod == 1)
syncinfo->sampling_rate = 44100;
else
syncinfo->sampling_rate = 48000;
// Get the frame size code
syncinfo->frmsizecod = tmp & 0x3f;
// Calculate the frame size and bitrate
syncinfo->frame_size =
frmsizecod_tbl[syncinfo->frmsizecod].frm_size[syncinfo->fscod];
syncinfo->bit_rate = frmsizecod_tbl[syncinfo->frmsizecod].bit_rate;
data[0] = bitstream_get_byte();
data[1] = bitstream_get_byte();
data[2] = bitstream_get_byte();
parse_syncinfo_data(syncinfo, data);
// Buffer the entire syncframe
bitstream_buffer_frame(syncinfo->frame_size * 2 - 5);
@ -144,9 +150,9 @@ parse_syncinfo(syncinfo_t *syncinfo)
// Check the crc over the entire frame
crc_init();
crc_process_byte(tmp>>16);
crc_process_byte((tmp>>8) & 0xff);
crc_process_byte(tmp & 0xff);
crc_process_byte(data[0]);
crc_process_byte(data[1]);
crc_process_byte(data[2]);
crc_process_frame(bitstream_get_buffer_start(),syncinfo->frame_size * 2 - 5);
if(!crc_validate())
@ -156,7 +162,8 @@ parse_syncinfo(syncinfo_t *syncinfo)
return;
}
stats_print_syncinfo(syncinfo);
if (!(ac3_config.flags & AC3_QUIET))
stats_print_syncinfo(syncinfo);
}
/*
@ -290,7 +297,8 @@ parse_bsi(bsi_t *bsi)
bsi->addbsi[i] = bitstream_get(8);
}
stats_print_bsi(bsi);
if (!(ac3_config.flags & AC3_QUIET))
stats_print_bsi(bsi);
}
/* More pain inducing parsing */
@ -598,7 +606,8 @@ parse_audblk(bsi_t *bsi,audblk_t *audblk)
}
}
stats_print_audblk(bsi,audblk);
if (!(ac3_config.flags & AC3_QUIET))
stats_print_audblk(bsi,audblk);
}
void