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Diffstat (limited to 'polyp/sample-util.h')
-rw-r--r-- | polyp/sample-util.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/polyp/sample-util.h b/polyp/sample-util.h new file mode 100644 index 00000000..73101ab4 --- /dev/null +++ b/polyp/sample-util.h @@ -0,0 +1,48 @@ +#ifndef foosampleutilhfoo +#define foosampleutilhfoo + +/* $Id$ */ + +/*** + 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. +***/ + +#include "sample.h" +#include "memblock.h" +#include "memchunk.h" + +#define PA_VOLUME_NORM (0x100) +#define PA_VOLUME_MUTE (0) + +struct pa_memblock *pa_silence_memblock(struct pa_memblock* b, const struct pa_sample_spec *spec); +void pa_silence_memchunk(struct pa_memchunk *c, const struct pa_sample_spec *spec); +void pa_silence_memory(void *p, size_t length, const struct pa_sample_spec *spec); + +struct pa_mix_info { + struct pa_memchunk chunk; + uint32_t volume; + void *userdata; +}; + +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); + +void pa_volume_memchunk(struct pa_memchunk*c, const struct pa_sample_spec *spec, uint32_t volume); + +uint32_t pa_volume_multiply(uint32_t a, uint32_t b); + +#endif |