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279 lines
8.5 KiB
C
279 lines
8.5 KiB
C
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#ifdef COMPILE_ME
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/*____________________________________________________________________________
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FreeAmp - The Free MP3 Player
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MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology
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Corp. http://www.xingtech.com
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Portions Copyright (C) 1998 EMusic.com
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: csbtb.c,v 1.2 1999/10/19 07:13:08 elrod Exp $
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____________________________________________________________________________*/
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/**** csbtb.c ***************************************************
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include to csbt.c
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MPEG audio decoder, dct and window - byte (8 pcm bit output)
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portable C
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******************************************************************/
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/*============================================================*/
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/*============================================================*/
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void windowB(float *vbuf, int vb_ptr, unsigned char *pcm);
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void windowB_dual(float *vbuf, int vb_ptr, unsigned char *pcm);
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void windowB16(float *vbuf, int vb_ptr, unsigned char *pcm);
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void windowB16_dual(float *vbuf, int vb_ptr, unsigned char *pcm);
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void windowB8(float *vbuf, int vb_ptr, unsigned char *pcm);
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void windowB8_dual(float *vbuf, int vb_ptr, unsigned char *pcm);
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/*============================================================*/
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void sbtB_mono(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct32(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 32) & 511;
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pcm += 32;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB_dual(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct32_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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fdct32_dual(sample + 1, pMP3Stream->vbuf2 + pMP3Stream->vb_ptr);
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windowB_dual(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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windowB_dual(pMP3Stream->vbuf2, pMP3Stream->vb_ptr, pcm + 1);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 32) & 511;
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pcm += 64;
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}
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}
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/*------------------------------------------------------------*/
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/* convert dual to mono */
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void sbtB_dual_mono(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct32_dual_mono(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 32) & 511;
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pcm += 32;
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}
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}
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/*------------------------------------------------------------*/
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/* convert dual to left */
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void sbtB_dual_left(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct32_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 32) & 511;
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pcm += 32;
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}
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}
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/*------------------------------------------------------------*/
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/* convert dual to right */
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void sbtB_dual_right(float *sample, unsigned char *pcm, int n)
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{
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int i;
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sample++; /* point to right chan */
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for (i = 0; i < n; i++)
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{
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fdct32_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 32) & 511;
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pcm += 32;
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}
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}
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/*------------------------------------------------------------*/
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/*---------------- 16 pt sbt's -------------------------------*/
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/*------------------------------------------------------------*/
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void sbtB16_mono(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct16(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB16(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 16) & 255;
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pcm += 16;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB16_dual(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct16_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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fdct16_dual(sample + 1, pMP3Stream->vbuf2 + pMP3Stream->vb_ptr);
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windowB16_dual(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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windowB16_dual(pMP3Stream->vbuf2, pMP3Stream->vb_ptr, pcm + 1);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 16) & 255;
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pcm += 32;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB16_dual_mono(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct16_dual_mono(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB16(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 16) & 255;
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pcm += 16;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB16_dual_left(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct16_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB16(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 16) & 255;
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pcm += 16;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB16_dual_right(float *sample, unsigned char *pcm, int n)
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{
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int i;
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sample++;
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for (i = 0; i < n; i++)
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{
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fdct16_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB16(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 16) & 255;
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pcm += 16;
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}
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}
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/*------------------------------------------------------------*/
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/*---------------- 8 pt sbt's -------------------------------*/
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/*------------------------------------------------------------*/
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void sbtB8_mono(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct8(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB8(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 8) & 127;
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pcm += 8;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB8_dual(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct8_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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fdct8_dual(sample + 1, pMP3Stream->vbuf2 + pMP3Stream->vb_ptr);
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windowB8_dual(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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windowB8_dual(pMP3Stream->vbuf2, pMP3Stream->vb_ptr, pcm + 1);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 8) & 127;
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pcm += 16;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB8_dual_mono(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct8_dual_mono(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB8(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 8) & 127;
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pcm += 8;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB8_dual_left(float *sample, unsigned char *pcm, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fdct8_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB8(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 8) & 127;
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pcm += 8;
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}
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}
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/*------------------------------------------------------------*/
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void sbtB8_dual_right(float *sample, unsigned char *pcm, int n)
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{
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int i;
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sample++;
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for (i = 0; i < n; i++)
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{
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fdct8_dual(sample, pMP3Stream->vbuf + pMP3Stream->vb_ptr);
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windowB8(pMP3Stream->vbuf, pMP3Stream->vb_ptr, pcm);
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sample += 64;
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pMP3Stream->vb_ptr = (pMP3Stream->vb_ptr - 8) & 127;
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pcm += 8;
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}
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}
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/*------------------------------------------------------------*/
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#endif // #ifdef COMPILE_ME
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