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68 lines
2.8 KiB
C
68 lines
2.8 KiB
C
/* GStreamer
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* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* (C) 2015 Wim Taymans <wim.taymans@gmail.com>
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*
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* audio-channel-mix.h: setup of channel conversion matrices
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_AUDIO_CHANNEL_MIX_H__
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#define __GST_AUDIO_CHANNEL_MIX_H__
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#include <gst/gst.h>
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#include <gst/audio/audio.h>
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typedef struct _GstAudioChannelMix GstAudioChannelMix;
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/**
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* GstAudioChannelMixFlags:
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_NONE: no flag
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_NON_INTERLEAVED: channels are not interleaved
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_IN: input channels are explicitly unpositioned
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_OUT: output channels are explicitly unpositioned
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*
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* Flags passed to gst_audio_channel_mix_new()
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*/
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typedef enum {
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GST_AUDIO_CHANNEL_MIX_FLAGS_NONE = 0,
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GST_AUDIO_CHANNEL_MIX_FLAGS_NON_INTERLEAVED = (1 << 0),
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GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_IN = (1 << 1),
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GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_OUT = (1 << 2)
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} GstAudioChannelMixFlags;
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GstAudioChannelMix * gst_audio_channel_mix_new (GstAudioChannelMixFlags flags,
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GstAudioFormat format,
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gint in_channels,
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GstAudioChannelPosition *in_position,
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gint out_channels,
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GstAudioChannelPosition *out_position);
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void gst_audio_channel_mix_free (GstAudioChannelMix *mix);
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/*
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* Checks for passthrough (= identity matrix).
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*/
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gboolean gst_audio_channel_mix_is_passthrough (GstAudioChannelMix *mix);
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/*
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* Do actual mixing.
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*/
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void gst_audio_channel_mix_samples (GstAudioChannelMix * mix,
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const gpointer in_data,
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gpointer out_data,
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gint samples);
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#endif /* __GST_AUDIO_CHANNEL_MIX_H__ */
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