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stream-util: Add pa_stream_get_volume_channel_map()

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The new function isn't used yet, but it soon will.
This commit is contained in:
Tanu Kaskinen 2013-12-17 21:17:55 +02:00
parent a3a795ef3d
commit 6cdb569b83
3 changed files with 137 additions and 0 deletions
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86
src/pulsecore/stream-util.c Normal file
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/***
This file is part of PulseAudio.
Copyright 2013 Intel Corporation
PulseAudio 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 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 PulseAudio; 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 "stream-util.h"
#include <pulse/def.h>
#include <pulsecore/core-format.h>
#include <pulsecore/macro.h>
int pa_stream_get_volume_channel_map(const pa_cvolume *volume, const pa_channel_map *original_map, const pa_format_info *format,
pa_channel_map *volume_map) {
int r;
pa_channel_map volume_map_local;
pa_assert(volume);
pa_assert(format);
pa_assert(volume_map);
if (original_map) {
if (volume->channels == original_map->channels) {
*volume_map = *original_map;
return 0;
}
if (volume->channels == 1) {
pa_channel_map_init_mono(volume_map);
return 0;
}
pa_log_info("Invalid stream parameters: the volume is incompatible with the channel map.");
return -PA_ERR_INVALID;
}
r = pa_format_info_get_channel_map(format, &volume_map_local);
if (r == -PA_ERR_NOENTITY) {
if (volume->channels == 1) {
pa_channel_map_init_mono(volume_map);
return 0;
}
pa_log_info("Invalid stream parameters: multi-channel volume is set, but channel map is not.");
return -PA_ERR_INVALID;
}
if (r < 0) {
pa_log_info("Invalid channel map.");
return -PA_ERR_INVALID;
}
if (volume->channels == volume_map_local.channels) {
*volume_map = volume_map_local;
return 0;
}
if (volume->channels == 1) {
pa_channel_map_init_mono(volume_map);
return 0;
}
pa_log_info("Invalid stream parameters: the volume is incompatible with the channel map.");
return -PA_ERR_INVALID;
}