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289 lines
7.9 KiB
289 lines
7.9 KiB
/*____________________________________________________________________________
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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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$Id$
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____________________________________________________________________________*/
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/**** isbtb.c ***************************************************
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include to isbt.c
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MPEG audio decoder, integer dct and window, 8 bit output
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******************************************************************/
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/* asm is quick only, c code does not need separate window for right */
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/* full is opposite of quick */
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#ifdef FULL_INTEGER
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#define i_windowB_dual_right i_windowB_dual
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#define i_windowB16_dual_right i_windowB16_dual
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#define i_windowB8_dual_right i_windowB8_dual
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#endif
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void i_windowB(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB_dual(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB_dual_right(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB16(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB16_dual(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB16_dual_right(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB8(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB8_dual(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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void i_windowB8_dual_right(WININT * vbuf, int vb_ptr, unsigned char *pcm);
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/*==============================================================*/
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/*==============================================================*/
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/*==============================================================*/
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void i_sbtB_mono(SAMPLEINT * 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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i_dct32(sample, vbuf + vb_ptr);
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i_windowB(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB_dual(SAMPLEINT * 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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i_dct32_dual(sample, vbuf + vb_ptr);
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i_dct32_dual(sample + 1, vbuf2 + vb_ptr);
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i_windowB_dual(vbuf, vb_ptr, pcm);
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i_windowB_dual_right(vbuf2, vb_ptr, pcm + 1);
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sample += 64;
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vb_ptr = (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 i_sbtB_dual_mono(SAMPLEINT * 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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i_dct32_dual_mono(sample, vbuf + vb_ptr);
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i_windowB(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB_dual_left(SAMPLEINT * 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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i_dct32_dual(sample, vbuf + vb_ptr);
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i_windowB(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB_dual_right(SAMPLEINT * 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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i_dct32_dual(sample, vbuf + vb_ptr);
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i_windowB(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB16_mono(SAMPLEINT * 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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i_dct16(sample, vbuf + vb_ptr);
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i_windowB16(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB16_dual(SAMPLEINT * 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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i_dct16_dual(sample, vbuf + vb_ptr);
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i_dct16_dual(sample + 1, vbuf2 + vb_ptr);
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i_windowB16_dual(vbuf, vb_ptr, pcm);
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i_windowB16_dual_right(vbuf2, vb_ptr, pcm + 1);
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sample += 64;
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vb_ptr = (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 i_sbtB16_dual_mono(SAMPLEINT * 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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i_dct16_dual_mono(sample, vbuf + vb_ptr);
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i_windowB16(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB16_dual_left(SAMPLEINT * 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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i_dct16_dual(sample, vbuf + vb_ptr);
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i_windowB16(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB16_dual_right(SAMPLEINT * 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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i_dct16_dual(sample, vbuf + vb_ptr);
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i_windowB16(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB8_mono(SAMPLEINT * 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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i_dct8(sample, vbuf + vb_ptr);
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i_windowB8(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB8_dual(SAMPLEINT * 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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i_dct8_dual(sample, vbuf + vb_ptr);
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i_dct8_dual(sample + 1, vbuf2 + vb_ptr);
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i_windowB8_dual(vbuf, vb_ptr, pcm);
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i_windowB8_dual_right(vbuf2, vb_ptr, pcm + 1);
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sample += 64;
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vb_ptr = (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 i_sbtB8_dual_mono(SAMPLEINT * 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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i_dct8_dual_mono(sample, vbuf + vb_ptr);
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i_windowB8(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB8_dual_left(SAMPLEINT * 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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i_dct8_dual(sample, vbuf + vb_ptr);
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i_windowB8(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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 i_sbtB8_dual_right(SAMPLEINT * 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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i_dct8_dual(sample, vbuf + vb_ptr);
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i_windowB8(vbuf, vb_ptr, pcm);
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sample += 64;
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vb_ptr = (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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