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51 lines
2.1 KiB
C
51 lines
2.1 KiB
C
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#ifndef foostreamutilhfoo
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#define foostreamutilhfoo
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/***
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This file is part of PulseAudio.
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Copyright 2013 Intel Corporation
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <pulse/format.h>
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#include <pulse/volume.h>
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/* This is a helper function that is called from pa_sink_input_new() and
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* pa_source_output_new(). The job of this function is to figure out what
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* channel map should be used for interpreting the volume that was set for the
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* stream. The channel map that the client intended for the volume may be
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* different than the final stream channel map, because the client may want the
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* server to decide the stream channel map.
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*
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* volume is the volume for which the channel map should be figured out.
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*
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* original_map is the channel map that is set in the new data struct's
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* channel_map field. If the channel map hasn't been set in the new data, then
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* original_map should be NULL.
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*
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* format is the negotiated format for the stream. It's used as a fallback if
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* original_map is not available.
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*
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* On success, the result is saved in volume_map. It's possible that this
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* function fails to figure out the right channel map for the volume, in which
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* case a negative error code is returned. */
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int pa_stream_get_volume_channel_map(const pa_cvolume *volume, const pa_channel_map *original_map, const pa_format_info *format,
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pa_channel_map *volume_map);
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#endif
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