mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-27 10:40:34 +00:00
877d6faeea
+ Refactor previous constructor to call on that new constructor + Reimplement is_passthrough to strictly check whether the matrix is an identity matrix, comparing channel-masks was incorrect: the mixer may be remixing from a list of positions to the same list of positions, but ordered differently, and reciprocally, the mixer may be remixing from a list of positions to another list of positions identically ordered + Remove unused tmp field, must have been a refactoring leftover https://bugzilla.gnome.org/show_bug.cgi?id=785471
84 lines
3.5 KiB
C
84 lines
3.5 KiB
C
/* 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_EXPORT
|
|
GstAudioChannelMixer * gst_audio_channel_mixer_new (GstAudioChannelMixerFlags flags,
|
|
GstAudioFormat format,
|
|
gint in_channels,
|
|
GstAudioChannelPosition *in_position,
|
|
gint out_channels,
|
|
GstAudioChannelPosition *out_position);
|
|
|
|
GST_EXPORT
|
|
GstAudioChannelMixer * gst_audio_channel_mixer_new_with_matrix (GstAudioChannelMixerFlags flags,
|
|
GstAudioFormat format,
|
|
gint in_channels,
|
|
gint out_channels,
|
|
gfloat **matrix);
|
|
|
|
GST_EXPORT
|
|
void gst_audio_channel_mixer_free (GstAudioChannelMixer *mix);
|
|
|
|
/*
|
|
* Checks for passthrough (= identity matrix).
|
|
*/
|
|
|
|
GST_EXPORT
|
|
gboolean gst_audio_channel_mixer_is_passthrough (GstAudioChannelMixer *mix);
|
|
|
|
/*
|
|
* Do actual mixing.
|
|
*/
|
|
|
|
GST_EXPORT
|
|
void gst_audio_channel_mixer_samples (GstAudioChannelMixer * mix,
|
|
const gpointer in[],
|
|
gpointer out[],
|
|
gint samples);
|
|
|
|
#endif /* __GST_AUDIO_CHANNEL_MIXER_H__ */
|