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7505b7a55c
Add some audio metadata to describe a downmix matrix. Add metadata to media type document.
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* GStreamer
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* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.com>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_AUDIO_META_H__
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#define __GST_AUDIO_META_H__
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#include <gst/gst.h>
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#include <gst/audio/audio.h>
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G_BEGIN_DECLS
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#define GST_AUDIO_DOWNMIX_META_API "GstAudioDownmixMeta"
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#define GST_AUDIO_DOWNMIX_META_INFO (gst_audio_downmix_meta_get_info())
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typedef struct _GstAudioDownmixMeta GstAudioDownmixMeta;
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/**
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* GstAudioDownmixMeta:
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* @meta: parent #GstMeta
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* @channels: the number of channels of the destination
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* @matrix: the matrix coefficients.
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*
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* Extra buffer metadata describing audio downmixing matrix. This metadata is
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* attached to audio buffers and contains a matrix to downmix the buffer number
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* of channels to @channels.
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*/
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struct _GstAudioDownmixMeta {
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GstMeta meta;
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guint channels;
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gfloat matrix[64];
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};
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const GstMetaInfo * gst_audio_downmix_meta_get_info (void);
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#define gst_buffer_get_audio_downmix_meta(b) ((GstAudioDownmixMeta*)gst_buffer_get_meta((b),GST_AUDIO_DOWNMIX_META_INFO))
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#define gst_buffer_add_audio_downmix_meta(b) ((GstAudioDownmixMeta*)gst_buffer_add_meta((b),GST_AUDIO_DOWNMIX_META_INFO, NULL))
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G_END_DECLS
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#endif /* __GST_AUDIO_META_H__ */
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