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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5cf367ae57
Rewrite audioconvert to try to make it more clear what steps are executed during conversion. Add passthrough step that just does a memcpy when possible. Add ORC optimized dither and quantization functions. Implement noise-shaping on S32 samples only and allow for arbitrary noise shaping coefficients if we want this later.
75 lines
2.1 KiB
C
75 lines
2.1 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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/audio.h>
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#include "gstchannelmix.h"
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#include "gstaudioquantize.h"
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GST_DEBUG_CATEGORY_EXTERN (audio_convert_debug);
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#define GST_CAT_DEFAULT (audio_convert_debug)
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typedef struct _AudioConvertCtx AudioConvertCtx;
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typedef void (*AudioConvertFunc) (gpointer dst, const gpointer src, gint count);
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struct _AudioConvertCtx
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{
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GstAudioInfo in;
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GstAudioInfo out;
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gboolean in_default;
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AudioConvertFunc convert_in;
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GstAudioFormat mix_format;
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gboolean mix_passthrough;
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GstChannelMix *mix;
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AudioConvertFunc convert_out;
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GstAudioQuantize *quant;
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gboolean out_default;
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gboolean passthrough;
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gpointer tmpbuf;
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gpointer tmpbuf2;
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gint tmpbufsize;
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};
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gboolean audio_convert_prepare_context (AudioConvertCtx * ctx,
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GstAudioInfo * in, GstAudioInfo * out,
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GstAudioDitherMethod dither, GstAudioNoiseShapingMethod ns);
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gboolean audio_convert_get_sizes (AudioConvertCtx * ctx, gint samples,
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gint * srcsize, 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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