From 41f6aea8fdbc744c13bc461056a2d694a5c4d06f Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sat, 17 Jul 2004 14:12:30 +0000 Subject: rename src to polyp git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@90 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/sample-util.c | 144 ------------------------------------------------------ 1 file changed, 144 deletions(-) delete mode 100644 src/sample-util.c (limited to 'src/sample-util.c') diff --git a/src/sample-util.c b/src/sample-util.c deleted file mode 100644 index d608ce1b..00000000 --- a/src/sample-util.c +++ /dev/null @@ -1,144 +0,0 @@ -/* $Id$ */ - -/*** - This file is part of polypaudio. - - polypaudio 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. - - polypaudio 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 polypaudio; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - USA. -***/ - -#ifdef HAVE_CONFIG_H -#include -#endif - -#include -#include -#include - -#include "sample-util.h" - -struct pa_memblock *pa_silence_memblock(struct pa_memblock* b, const struct pa_sample_spec *spec) { - assert(b && b->data && spec); - pa_silence_memory(b->data, b->length, spec); - return b; -} - -void pa_silence_memchunk(struct pa_memchunk *c, const struct pa_sample_spec *spec) { - assert(c && c->memblock && c->memblock->data && spec && c->length); - pa_silence_memory(c->memblock->data+c->index, c->length, spec); -} - -void pa_silence_memory(void *p, size_t length, const struct pa_sample_spec *spec) { - char c = 0; - assert(p && length && spec); - - switch (spec->format) { - case PA_SAMPLE_U8: - c = 127; - break; - case PA_SAMPLE_S16LE: - case PA_SAMPLE_S16BE: - case PA_SAMPLE_FLOAT32: - c = 0; - break; - case PA_SAMPLE_ALAW: - case PA_SAMPLE_ULAW: - c = 80; - break; - default: - assert(0); - } - - memset(p, c, length); -} - -size_t pa_mix(struct pa_mix_info channels[], unsigned nchannels, void *data, size_t length, const struct pa_sample_spec *spec, uint32_t volume) { - unsigned c, d; - assert(channels && data && length && spec); - assert(spec->format == PA_SAMPLE_S16NE); - - for (d = 0;; d += sizeof(int16_t)) { - int32_t sum = 0; - - if (d >= length) - return d; - - for (c = 0; c < nchannels; c++) { - int32_t v; - uint32_t volume = channels[c].volume; - - if (d >= channels[c].chunk.length) - return d; - - if (volume == PA_VOLUME_MUTE) - v = 0; - else { - v = *((int16_t*) (channels[c].chunk.memblock->data + channels[c].chunk.index + d)); - - if (volume != PA_VOLUME_NORM) - v = (int32_t) ((float)v*volume/PA_VOLUME_NORM); - } - - sum += v; - } - - if (volume == PA_VOLUME_MUTE) - sum = 0; - else if (volume != PA_VOLUME_NORM) - sum = (int32_t) ((float) sum*volume/PA_VOLUME_NORM); - - if (sum < -0x8000) sum = -0x8000; - if (sum > 0x7FFF) sum = 0x7FFF; - - *((int16_t*) data) = sum; - data += sizeof(int16_t); - } -} - - -void pa_volume_memchunk(struct pa_memchunk*c, const struct pa_sample_spec *spec, uint32_t volume) { - int16_t *d; - size_t n; - assert(c && spec && (c->length % pa_sample_size(spec) == 0)); - assert(spec->format == PA_SAMPLE_S16NE); - - if (volume == PA_VOLUME_NORM) - return; - - if (volume == PA_VOLUME_MUTE) { - pa_silence_memchunk(c, spec); - return; - } - - for (d = (c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) { - int32_t t = (int32_t)(*d); - - t *= volume; - t /= PA_VOLUME_NORM; - - if (t < -0x8000) t = -0x8000; - if (t > 0x7FFF) t = 0x7FFF; - - *d = (int16_t) t; - } -} - -uint32_t pa_volume_multiply(uint32_t a, uint32_t b) { - uint64_t p = a; - p *= b; - p /= PA_VOLUME_NORM; - - return (uint32_t) p; -} -- cgit