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99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/* GStreamer
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* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
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* (C) 2015 Wim Taymans <wim.taymans@gmail.com>
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*
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* gstaudioquantize.h: quantizes audio to the target format and optionally
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* applies dithering and noise shaping.
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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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#include <gst/gst.h>
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#include <gst/audio/audio.h>
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#ifndef __GST_AUDIO_QUANTIZE_H__
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#define __GST_AUDIO_QUANTIZE_H__
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/**
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* GstAudioDitherMethod:
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* @GST_AUDIO_DITHER_NONE: No dithering
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* @GST_AUDIO_DITHER_RPDF: Rectangular dithering
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* @GST_AUDIO_DITHER_TPDF: Triangular dithering (default)
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* @GST_AUDIO_DITHER_TPDF_HF: High frequency triangular dithering
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*
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* Set of available dithering methods.
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*/
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typedef enum
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{
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GST_AUDIO_DITHER_NONE = 0,
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GST_AUDIO_DITHER_RPDF,
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GST_AUDIO_DITHER_TPDF,
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GST_AUDIO_DITHER_TPDF_HF
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} GstAudioDitherMethod;
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/**
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* GstAudioNoiseShapingMethod:
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* @GST_AUDIO_NOISE_SHAPING_NONE: No noise shaping (default)
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* @GST_AUDIO_NOISE_SHAPING_ERROR_FEEDBACK: Error feedback
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* @GST_AUDIO_NOISE_SHAPING_SIMPLE: Simple 2-pole noise shaping
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* @GST_AUDIO_NOISE_SHAPING_MEDIUM: Medium 5-pole noise shaping
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* @GST_AUDIO_NOISE_SHAPING_HIGH: High 8-pole noise shaping
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*
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* Set of available noise shaping methods
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*/
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typedef enum
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{
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GST_AUDIO_NOISE_SHAPING_NONE = 0,
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GST_AUDIO_NOISE_SHAPING_ERROR_FEEDBACK,
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GST_AUDIO_NOISE_SHAPING_SIMPLE,
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GST_AUDIO_NOISE_SHAPING_MEDIUM,
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GST_AUDIO_NOISE_SHAPING_HIGH
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} GstAudioNoiseShapingMethod;
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/**
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* GstAudioQuantizeFlags:
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* @GST_AUDIO_QUANTIZE_FLAG_NONE: no flags
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* @GST_AUDIO_QUANTIZE_FLAG_NON_INTERLEAVED: samples are non-interleaved
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*
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* Extra flags that can be passed to gst_audio_quantize_new()
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*/
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typedef enum
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{
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GST_AUDIO_QUANTIZE_FLAG_NONE = 0,
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GST_AUDIO_QUANTIZE_FLAG_NON_INTERLEAVED = (1 << 0)
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} GstAudioQuantizeFlags;
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typedef struct _GstAudioQuantize GstAudioQuantize;
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GstAudioQuantize * gst_audio_quantize_new (GstAudioDitherMethod dither,
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GstAudioNoiseShapingMethod ns,
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GstAudioQuantizeFlags flags,
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GstAudioFormat format,
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guint channels,
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guint quantizer);
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void gst_audio_quantize_free (GstAudioQuantize * quant);
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void gst_audio_quantize_reset (GstAudioQuantize * quant);
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void gst_audio_quantize_samples (GstAudioQuantize * quant,
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const gpointer in[],
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gpointer out[], guint samples);
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#endif /* __GST_AUDIO_QUANTIZE_H__ */
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