2 * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * audioconvert.h: audio format conversion library
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
22 #ifndef __AUDIO_CONVERT_H__
23 #define __AUDIO_CONVERT_H__
26 #include <gst/audio/multichannel.h>
28 typedef struct _AudioConvertCtx AudioConvertCtx;
29 typedef struct _AudioConvertFmt AudioConvertFmt;
31 struct _AudioConvertFmt
39 GstAudioChannelPosition *pos;
48 typedef void (*AudioConvertUnpack) (gpointer src, gpointer dst, gint scale, gint count);
49 typedef void (*AudioConvertPack) (gpointer src, gpointer dst, gint scale, gint count);
51 typedef void (*AudioConvertMix) (AudioConvertCtx *, gpointer, gpointer, gint);
53 struct _AudioConvertCtx
58 AudioConvertUnpack unpack;
59 AudioConvertPack pack;
61 /* channel conversion matrix, m[in_channels][out_channels].
62 * If identity matrix, passthrough applies. */
64 /* temp storage for channelmix */
68 gboolean mix_passthrough;
77 AudioConvertMix channel_mix;
80 gboolean audio_convert_clean_fmt (AudioConvertFmt *fmt);
82 gboolean audio_convert_prepare_context (AudioConvertCtx *ctx, AudioConvertFmt *in,
83 AudioConvertFmt *out);
84 gboolean audio_convert_get_sizes (AudioConvertCtx *ctx, gint samples, gint *srcsize,
87 gboolean audio_convert_clean_context (AudioConvertCtx *ctx);
89 gboolean audio_convert_convert (AudioConvertCtx *ctx, gpointer src,
90 gpointer dst, gint samples, gboolean src_writable);
92 #endif /* __AUDIO_CONVERT_H__ */