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Diffstat (limited to 'codecs/mp3/src/csbtb.c')
-rwxr-xr-x | codecs/mp3/src/csbtb.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/codecs/mp3/src/csbtb.c b/codecs/mp3/src/csbtb.c new file mode 100755 index 000000000..158c38151 --- /dev/null +++ b/codecs/mp3/src/csbtb.c @@ -0,0 +1,276 @@ +/*____________________________________________________________________________ + + FreeAmp - The Free MP3 Player + + MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology + Corp. http://www.xingtech.com + + Portions Copyright (C) 1998 EMusic.com + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id$ +____________________________________________________________________________*/ + +/**** csbtb.c *************************************************** +include to csbt.c + +MPEG audio decoder, dct and window - byte (8 pcm bit output) +portable C + +******************************************************************/ +/*============================================================*/ +/*============================================================*/ +void windowB(MPEG *m, float *, int , unsigned char *pcm); +void windowB_dual(MPEG *m, float *, int , unsigned char *pcm); +void windowB16(MPEG *m, float *, int , unsigned char *pcm); +void windowB16_dual(MPEG *m, float *, int , unsigned char *pcm); +void windowB8(MPEG *m, float *, int , unsigned char *pcm); +void windowB8_dual(MPEG *m, float *, int , unsigned char *pcm); + +/*============================================================*/ +void sbtB_mono(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct32(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 32) & 511; + pcm += 32; + } + +} +/*------------------------------------------------------------*/ +void sbtB_dual(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct32_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + fdct32_dual(m,sample + 1, m->csbt.vbuf2 + m->csbt.vb_ptr); + windowB_dual(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + windowB_dual(m,m->csbt.vbuf2, m->csbt.vb_ptr, pcm + 1); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 32) & 511; + pcm += 64; + } + + +} +/*------------------------------------------------------------*/ +/* convert dual to mono */ +void sbtB_dual_mono(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct32_dual_mono(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 32) & 511; + pcm += 32; + } + +} +/*------------------------------------------------------------*/ +/* convert dual to left */ +void sbtB_dual_left(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct32_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 32) & 511; + pcm += 32; + } +} +/*------------------------------------------------------------*/ +/* convert dual to right */ +void sbtB_dual_right(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + sample++; /* point to right chan */ + for (i = 0; i < n; i++) + { + fdct32_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 32) & 511; + pcm += 32; + } +} +/*------------------------------------------------------------*/ +/*---------------- 16 pt sbt's -------------------------------*/ +/*------------------------------------------------------------*/ +void sbtB16_mono(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct16(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB16(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 16) & 255; + pcm += 16; + } + + +} +/*------------------------------------------------------------*/ +void sbtB16_dual(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct16_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + fdct16_dual(m,sample + 1, m->csbt.vbuf2 + m->csbt.vb_ptr); + windowB16_dual(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + windowB16_dual(m,m->csbt.vbuf2, m->csbt.vb_ptr, pcm + 1); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 16) & 255; + pcm += 32; + } +} +/*------------------------------------------------------------*/ +void sbtB16_dual_mono(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct16_dual_mono(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB16(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 16) & 255; + pcm += 16; + } +} +/*------------------------------------------------------------*/ +void sbtB16_dual_left(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct16_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB16(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 16) & 255; + pcm += 16; + } +} +/*------------------------------------------------------------*/ +void sbtB16_dual_right(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + sample++; + for (i = 0; i < n; i++) + { + fdct16_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB16(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 16) & 255; + pcm += 16; + } +} +/*------------------------------------------------------------*/ +/*---------------- 8 pt sbt's -------------------------------*/ +/*------------------------------------------------------------*/ +void sbtB8_mono(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct8(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB8(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 8) & 127; + pcm += 8; + } + +} +/*------------------------------------------------------------*/ +void sbtB8_dual(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct8_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + fdct8_dual(m,sample + 1, m->csbt.vbuf2 + m->csbt.vb_ptr); + windowB8_dual(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + windowB8_dual(m,m->csbt.vbuf2, m->csbt.vb_ptr, pcm + 1); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 8) & 127; + pcm += 16; + } +} +/*------------------------------------------------------------*/ +void sbtB8_dual_mono(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct8_dual_mono(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB8(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 8) & 127; + pcm += 8; + } +} +/*------------------------------------------------------------*/ +void sbtB8_dual_left(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + for (i = 0; i < n; i++) + { + fdct8_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB8(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 8) & 127; + pcm += 8; + } +} +/*------------------------------------------------------------*/ +void sbtB8_dual_right(MPEG *m, float *sample, unsigned char *pcm, int n) +{ + int i; + + sample++; + for (i = 0; i < n; i++) + { + fdct8_dual(m,sample, m->csbt.vbuf + m->csbt.vb_ptr); + windowB8(m,m->csbt.vbuf, m->csbt.vb_ptr, pcm); + sample += 64; + m->csbt.vb_ptr = (m->csbt.vb_ptr - 8) & 127; + pcm += 8; + } +} +/*------------------------------------------------------------*/ |