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-rw-r--r--gst/audioconvert/audioconvert.h143
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diff --git a/gst/audioconvert/audioconvert.h b/gst/audioconvert/audioconvert.h
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--- a/gst/audioconvert/audioconvert.h
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-/* GStreamer
- * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
- *
- * audioconvert.h: audio format conversion library
- *
- * 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifndef __AUDIO_CONVERT_H__
-#define __AUDIO_CONVERT_H__
-
-#include <gst/gst.h>
-#include <gst/audio/multichannel.h>
-
-/**
- * GstAudioConvertDithering:
- * @DITHER_NONE: No dithering
- * @DITHER_RPDF: Rectangular dithering
- * @DITHER_TPDF: Triangular dithering (default)
- * @DITHER_TPDF_HF: High frequency triangular dithering
- *
- * Set of available dithering methods when converting audio.
- */
-typedef enum
-{
- DITHER_NONE = 0,
- DITHER_RPDF,
- DITHER_TPDF,
- DITHER_TPDF_HF
-} GstAudioConvertDithering;
-
-/**
- * GstAudioConvertNoiseShaping:
- * @NOISE_SHAPING_NONE: No noise shaping (default)
- * @NOISE_SHAPING_ERROR_FEEDBACK: Error feedback
- * @NOISE_SHAPING_SIMPLE: Simple 2-pole noise shaping
- * @NOISE_SHAPING_MEDIUM: Medium 5-pole noise shaping
- * @NOISE_SHAPING_HIGH: High 8-pole noise shaping
- *
- * Set of available noise shaping methods
- */
-typedef enum
-{
- NOISE_SHAPING_NONE = 0,
- NOISE_SHAPING_ERROR_FEEDBACK,
- NOISE_SHAPING_SIMPLE,
- NOISE_SHAPING_MEDIUM,
- NOISE_SHAPING_HIGH
-} GstAudioConvertNoiseShaping;
-
-typedef struct _AudioConvertCtx AudioConvertCtx;
-typedef struct _AudioConvertFmt AudioConvertFmt;
-
-struct _AudioConvertFmt
-{
- /* general caps */
- gboolean is_int;
- gint endianness;
- gint width;
- gint rate;
- gint channels;
- GstAudioChannelPosition *pos;
- gboolean unpositioned_layout;
-
- /* int audio caps */
- gboolean sign;
- gint depth;
-
- gint unit_size;
-};
-
-typedef void (*AudioConvertUnpack) (gpointer src, gpointer dst, gint scale,
- gint count);
-typedef void (*AudioConvertPack) (gpointer src, gpointer dst, gint scale,
- gint count);
-
-typedef void (*AudioConvertMix) (AudioConvertCtx *, gpointer, gpointer, gint);
-typedef void (*AudioConvertQuantize) (AudioConvertCtx * ctx, gpointer src,
- gpointer dst, gint count);
-
-struct _AudioConvertCtx
-{
- AudioConvertFmt in;
- AudioConvertFmt out;
-
- AudioConvertUnpack unpack;
- AudioConvertPack pack;
-
- /* channel conversion matrix, m[in_channels][out_channels].
- * If identity matrix, passthrough applies. */
- gfloat **matrix;
- /* temp storage for channelmix */
- gpointer tmp;
-
- gboolean in_default;
- gboolean mix_passthrough;
- gboolean out_default;
-
- gpointer tmpbuf;
- gint tmpbufsize;
-
- gint in_scale;
- gint out_scale;
-
- AudioConvertMix channel_mix;
-
- AudioConvertQuantize quantize;
-
- GstAudioConvertDithering dither;
- GstAudioConvertNoiseShaping ns;
- /* last random number generated per channel for hifreq TPDF dither */
- gpointer last_random;
- /* contains the past quantization errors, error[out_channels][count] */
- gdouble *error_buf;
-};
-
-gboolean audio_convert_clean_fmt (AudioConvertFmt * fmt);
-
-gboolean audio_convert_prepare_context (AudioConvertCtx * ctx,
- AudioConvertFmt * in, AudioConvertFmt * out,
- GstAudioConvertDithering dither, GstAudioConvertNoiseShaping ns);
-gboolean audio_convert_get_sizes (AudioConvertCtx * ctx, gint samples,
- gint * srcsize, gint * dstsize);
-
-gboolean audio_convert_clean_context (AudioConvertCtx * ctx);
-
-gboolean audio_convert_convert (AudioConvertCtx * ctx, gpointer src,
- gpointer dst, gint samples, gboolean src_writable);
-
-#endif /* __AUDIO_CONVERT_H__ */