diff options
Diffstat (limited to 'polyp/sample-util.c')
| -rw-r--r-- | polyp/sample-util.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/polyp/sample-util.c b/polyp/sample-util.c deleted file mode 100644 index bf8be34e..00000000 --- a/polyp/sample-util.c +++ /dev/null @@ -1,268 +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 Lesser 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 Lesser 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 <config.h> -#endif - -#include <stdio.h> -#include <string.h> -#include <assert.h> -#include <stdlib.h> - -#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((uint8_t*) c->memblock->data+c->index, c->length, spec); -} - -void pa_silence_memory(void *p, size_t length, const struct pa_sample_spec *spec) { - uint8_t c = 0; - assert(p && length && spec); - - switch (spec->format) { - case PA_SAMPLE_U8: - c = 0x80; - 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, pa_volume_t volume) { - assert(channels && data && length && spec); - - if (spec->format == PA_SAMPLE_S16NE) { - size_t d; - - for (d = 0;; d += sizeof(int16_t)) { - unsigned c; - int32_t sum = 0; - - if (d >= length) - return d; - - for (c = 0; c < nchannels; c++) { - int32_t v; - pa_volume_t cvolume = channels[c].volume; - - if (d >= channels[c].chunk.length) - return d; - - if (cvolume == PA_VOLUME_MUTED) - v = 0; - else { - v = *((int16_t*) ((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d)); - - if (cvolume != PA_VOLUME_NORM) { - v *= cvolume; - v /= PA_VOLUME_NORM; - } - } - - sum += v; - } - - if (volume == PA_VOLUME_MUTED) - sum = 0; - else if (volume != PA_VOLUME_NORM) { - sum *= volume; - sum /= PA_VOLUME_NORM; - } - - if (sum < -0x8000) sum = -0x8000; - if (sum > 0x7FFF) sum = 0x7FFF; - - *((int16_t*) data) = sum; - data = (uint8_t*) data + sizeof(int16_t); - } - } else if (spec->format == PA_SAMPLE_U8) { - size_t d; - - for (d = 0;; d ++) { - int32_t sum = 0; - unsigned c; - - if (d >= length) - return d; - - for (c = 0; c < nchannels; c++) { - int32_t v; - pa_volume_t cvolume = channels[c].volume; - - if (d >= channels[c].chunk.length) - return d; - - if (cvolume == PA_VOLUME_MUTED) - v = 0; - else { - v = (int32_t) *((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d) - 0x80; - - if (cvolume != PA_VOLUME_NORM) { - v *= cvolume; - v /= PA_VOLUME_NORM; - } - } - - sum += v; - } - - if (volume == PA_VOLUME_MUTED) - sum = 0; - else if (volume != PA_VOLUME_NORM) { - sum *= volume; - sum /= PA_VOLUME_NORM; - } - - if (sum < -0x80) sum = -0x80; - if (sum > 0x7F) sum = 0x7F; - - *((uint8_t*) data) = (uint8_t) (sum + 0x80); - data = (uint8_t*) data + 1; - } - - } else if (spec->format == PA_SAMPLE_FLOAT32NE) { - size_t d; - - for (d = 0;; d += sizeof(float)) { - pa_volume_t sum = 0; - unsigned c; - - if (d >= length) - return d; - - for (c = 0; c < nchannels; c++) { - float v; - pa_volume_t cvolume = channels[c].volume; - - if (d >= channels[c].chunk.length) - return d; - - if (cvolume == PA_VOLUME_MUTED) - v = 0; - else { - v = *((float*) ((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d)); - - if (cvolume != PA_VOLUME_NORM) - v = v*cvolume/PA_VOLUME_NORM; - } - - sum += v; - } - - if (volume == PA_VOLUME_MUTED) - sum = 0; - else if (volume != PA_VOLUME_NORM) - sum = sum*volume/PA_VOLUME_NORM; - - if (sum < -1) sum = -1; - if (sum > 1) sum = 1; - - *((float*) data) = sum; - data = (uint8_t*) data + sizeof(float); - } - } else { - abort(); - } -} - - -void pa_volume_memchunk(struct pa_memchunk*c, const struct pa_sample_spec *spec, pa_volume_t volume) { - assert(c && spec && (c->length % pa_frame_size(spec) == 0)); - - if (volume == PA_VOLUME_NORM) - return; - - if (volume == PA_VOLUME_MUTED) { - pa_silence_memchunk(c, spec); - return; - } - - if (spec->format == PA_SAMPLE_S16NE) { - int16_t *d; - size_t n; - - for (d = (int16_t*) ((uint8_t*) 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; - } - } else if (spec->format == PA_SAMPLE_U8) { - uint8_t *d; - size_t n; - - for (d = (uint8_t*) c->memblock->data + c->index, n = c->length; n > 0; d++, n--) { - int32_t t = (int32_t) *d - 0x80; - - t *= volume; - t /= PA_VOLUME_NORM; - - if (t < -0x80) t = -0x80; - if (t > 0x7F) t = 0x7F; - - *d = (uint8_t) (t + 0x80); - - } - } else if (spec->format == PA_SAMPLE_FLOAT32NE) { - float *d; - size_t n; - - for (d = (float*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(float); n > 0; d++, n--) { - float t = *d; - - t *= volume; - t /= PA_VOLUME_NORM; - - if (t < -1) t = -1; - if (t > 1) t = 1; - - *d = t; - } - - } else { - abort(); - } -} - |