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/* GStreamer
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (C) 2015 Wim Taymans <wim.taymans@gmail.com>
*
* audio-channel-mixer.h: setup of channel conversion matrices
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_AUDIO_CHANNEL_MIXER_H__
#define __GST_AUDIO_CHANNEL_MIXER_H__
#include <gst/gst.h>
#include <gst/audio/audio.h>
typedef struct _GstAudioChannelMixer GstAudioChannelMixer;
/**
* GstAudioChannelMixerFlags:
* @GST_AUDIO_CHANNEL_MIXER_FLAGS_NONE: no flag
* @GST_AUDIO_CHANNEL_MIXER_FLAGS_NON_INTERLEAVED_IN: input channels are not interleaved
* @GST_AUDIO_CHANNEL_MIXER_FLAGS_NON_INTERLEAVED_OUT: output channels are not interleaved
* @GST_AUDIO_CHANNEL_MIXER_FLAGS_UNPOSITIONED_IN: input channels are explicitly unpositioned
* @GST_AUDIO_CHANNEL_MIXER_FLAGS_UNPOSITIONED_OUT: output channels are explicitly unpositioned
*
* Flags passed to gst_audio_channel_mixer_new()
*/
typedef enum {
GST_AUDIO_CHANNEL_MIXER_FLAGS_NONE = 0,
GST_AUDIO_CHANNEL_MIXER_FLAGS_NON_INTERLEAVED_IN = (1 << 0),
GST_AUDIO_CHANNEL_MIXER_FLAGS_NON_INTERLEAVED_OUT = (1 << 1),
GST_AUDIO_CHANNEL_MIXER_FLAGS_UNPOSITIONED_IN = (1 << 2),
GST_AUDIO_CHANNEL_MIXER_FLAGS_UNPOSITIONED_OUT = (1 << 3)
} GstAudioChannelMixerFlags;
GST_AUDIO_API
GstAudioChannelMixer * gst_audio_channel_mixer_new (GstAudioChannelMixerFlags flags,
GstAudioFormat format,
gint in_channels,
GstAudioChannelPosition *in_position,
gint out_channels,
GstAudioChannelPosition *out_position);
GST_AUDIO_API
GstAudioChannelMixer * gst_audio_channel_mixer_new_with_matrix (GstAudioChannelMixerFlags flags,
GstAudioFormat format,
gint in_channels,
gint out_channels,
gfloat **matrix);
GST_AUDIO_API
void gst_audio_channel_mixer_free (GstAudioChannelMixer *mix);
/*
* Checks for passthrough (= identity matrix).
*/
GST_AUDIO_API
gboolean gst_audio_channel_mixer_is_passthrough (GstAudioChannelMixer *mix);
/*
* Do actual mixing.
*/
GST_AUDIO_API
void gst_audio_channel_mixer_samples (GstAudioChannelMixer * mix,
const gpointer in[],
gpointer out[],
gint samples);
#endif /* __GST_AUDIO_CHANNEL_MIXER_H__ */
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