aabc2/KOS_qrcodes
1
0
Fork 0
forked from KolibriOS/kolibrios
Code Pull Requests Activity

libmpg123 1.9.0

Browse Source 
git-svn-id: svn://kolibrios.org@1905 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2011-03-11 10:57:03 +00:00
parent 423f2f50d2
commit a316fa7c9d
58 changed files with 18597 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

86
programs/develop/libraries/libmpg123/synth_8bit.h Normal file
View File

@@ -0,0 +1,86 @@
/*
synth_8bit.h: Wrappers over optimized synth_xtoy for converting signed short to 8bit.
copyright 1995-2008 by the mpg123 project - free software under the terms of the LGPL 2.1
see COPYING and AUTHORS files in distribution or http://mpg123.org
initially written by Michael Hipp, code generalized to the wrapper by Thomas Orgis
Only variable is the BLOCK size to choose 1to1, 2to1 or 4to1.
Oh, and the names: BASE_SYNTH_NAME, SYNTH_NAME, MONO_NAME, MONO2STEREO_NAME
(p.ex. opt_synth_1to1(fr), synth_1to1_8bit, synth_1to1_8bit_mono, ...).
*/
int SYNTH_NAME(real *bandPtr, int channel, mpg123_handle *fr, int final)
{
short samples_tmp[BLOCK];
short *tmp1 = samples_tmp + channel;
int i,ret;
unsigned char *samples = fr->buffer.data;
int pnt = fr->buffer.fill;
fr->buffer.data = (unsigned char*) samples_tmp;
fr->buffer.fill = 0;
ret = BASE_SYNTH_NAME(bandPtr, channel, fr , 0);
fr->buffer.data = samples;
samples += channel + pnt;
for(i=0;i<(BLOCK/2);i++)
{
*samples = fr->conv16to8[*tmp1>>AUSHIFT];
samples += 2;
tmp1 += 2;
}
fr->buffer.fill = pnt + (final ? BLOCK : 0 );
return ret;
}
int MONO_NAME(real *bandPtr, mpg123_handle *fr)
{
short samples_tmp[BLOCK];
short *tmp1 = samples_tmp;
int i,ret;
unsigned char *samples = fr->buffer.data;
int pnt = fr->buffer.fill;
fr->buffer.data = (unsigned char*) samples_tmp;
fr->buffer.fill = 0;
ret = BASE_SYNTH_NAME(bandPtr, 0, fr, 0);
fr->buffer.data = samples;
samples += pnt;
for(i=0;i<(BLOCK/2);i++)
{
*samples++ = fr->conv16to8[*tmp1>>AUSHIFT];
tmp1+=2;
}
fr->buffer.fill = pnt + BLOCK/2;
return ret;
}
int MONO2STEREO_NAME(real *bandPtr, mpg123_handle *fr)
{
short samples_tmp[BLOCK];
short *tmp1 = samples_tmp;
int i,ret;
unsigned char *samples = fr->buffer.data;
int pnt = fr->buffer.fill;
fr->buffer.data = (unsigned char*) samples_tmp;
fr->buffer.fill = 0;
ret = BASE_SYNTH_NAME(bandPtr, 0, fr, 0);
fr->buffer.data = samples;
samples += pnt;
for(i=0;i<(BLOCK/2);i++)
{
*samples++ = fr->conv16to8[*tmp1>>AUSHIFT];
*samples++ = fr->conv16to8[*tmp1>>AUSHIFT];
tmp1 += 2;
}
fr->buffer.fill = pnt + BLOCK;
return ret;
}