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88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/* GStreamer
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* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* audioconvert.h: audio format conversion library
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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 __AUDIO_CONVERT_H__
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#define __AUDIO_CONVERT_H__
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#include <gst/gst.h>
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#include <gst/audio/multichannel.h>
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typedef struct _AudioConvertCtx AudioConvertCtx;
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typedef struct _AudioConvertFmt AudioConvertFmt;
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struct _AudioConvertFmt
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{
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/* general caps */
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gboolean is_int;
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gint endianness;
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gint width;
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gint rate;
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gint channels;
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GstAudioChannelPosition *pos;
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/* int audio caps */
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gboolean sign;
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gint depth;
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gint unit_size;
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};
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typedef void (*AudioConvertUnpack) (gpointer src, gint32 *dst, gint scale, gint count);
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typedef void (*AudioConvertPack) (gint32 *src, gpointer dst, gint scale, gint count);
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struct _AudioConvertCtx
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{
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AudioConvertFmt in;
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AudioConvertFmt out;
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AudioConvertUnpack unpack;
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AudioConvertPack pack;
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/* channel conversion matrix, m[in_channels][out_channels].
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* If identity matrix, passthrough applies. */
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gfloat **matrix;
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/* temp storage for channelmix */
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gint32 *tmp;
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gboolean in_default;
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gboolean mix_passthrough;
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gboolean out_default;
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gpointer tmpbuf;
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gint tmpbufsize;
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gint in_scale;
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gint out_scale;
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};
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gboolean audio_convert_clean_fmt (AudioConvertFmt *fmt);
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gboolean audio_convert_prepare_context (AudioConvertCtx *ctx, AudioConvertFmt *in,
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AudioConvertFmt *out);
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gboolean audio_convert_get_sizes (AudioConvertCtx *ctx, gint samples, gint *srcsize,
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gint *dstsize);
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gboolean audio_convert_clean_context (AudioConvertCtx *ctx);
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gboolean audio_convert_convert (AudioConvertCtx *ctx, gpointer src,
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gpointer dst, gint samples, gboolean src_writable);
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#endif /* __AUDIO_CONVERT_H__ */
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