1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/* GStreamer
* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
* (C) 2015 Wim Taymans <wim.taymans@gmail.com>
*
* gstaudioquantize.h: quantizes audio to the target format and optionally
* applies dithering and noise shaping.
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <gst/gst.h>
#include <gst/audio/audio.h>
#ifndef __GST_AUDIO_QUANTIZE_H__
#define __GST_AUDIO_QUANTIZE_H__
/**
* GstAudioDitherMethod:
* @GST_AUDIO_DITHER_NONE: No dithering
* @GST_AUDIO_DITHER_RPDF: Rectangular dithering
* @GST_AUDIO_DITHER_TPDF: Triangular dithering (default)
* @GST_AUDIO_DITHER_TPDF_HF: High frequency triangular dithering
*
* Set of available dithering methods.
*/
typedef enum
{
GST_AUDIO_DITHER_NONE = 0,
GST_AUDIO_DITHER_RPDF,
GST_AUDIO_DITHER_TPDF,
GST_AUDIO_DITHER_TPDF_HF
} GstAudioDitherMethod;
/**
* GstAudioNoiseShapingMethod:
* @GST_AUDIO_NOISE_SHAPING_NONE: No noise shaping (default)
* @GST_AUDIO_NOISE_SHAPING_ERROR_FEEDBACK: Error feedback
* @GST_AUDIO_NOISE_SHAPING_SIMPLE: Simple 2-pole noise shaping
* @GST_AUDIO_NOISE_SHAPING_MEDIUM: Medium 5-pole noise shaping
* @GST_AUDIO_NOISE_SHAPING_HIGH: High 8-pole noise shaping
*
* Set of available noise shaping methods
*/
typedef enum
{
GST_AUDIO_NOISE_SHAPING_NONE = 0,
GST_AUDIO_NOISE_SHAPING_ERROR_FEEDBACK,
GST_AUDIO_NOISE_SHAPING_SIMPLE,
GST_AUDIO_NOISE_SHAPING_MEDIUM,
GST_AUDIO_NOISE_SHAPING_HIGH
} GstAudioNoiseShapingMethod;
/**
* GstAudioQuantizeFlags:
* @GST_AUDIO_QUANTIZE_FLAG_NONE: no flags
* @GST_AUDIO_QUANTIZE_FLAG_NON_INTERLEAVED: samples are non-interleaved
*
* Extra flags that can be passed to gst_audio_quantize_new()
*/
typedef enum
{
GST_AUDIO_QUANTIZE_FLAG_NONE = 0,
GST_AUDIO_QUANTIZE_FLAG_NON_INTERLEAVED = (1 << 0)
} GstAudioQuantizeFlags;
typedef struct _GstAudioQuantize GstAudioQuantize;
GST_AUDIO_API
GstAudioQuantize * gst_audio_quantize_new (GstAudioDitherMethod dither,
GstAudioNoiseShapingMethod ns,
GstAudioQuantizeFlags flags,
GstAudioFormat format,
guint channels,
guint quantizer);
GST_AUDIO_API
void gst_audio_quantize_free (GstAudioQuantize * quant);
GST_AUDIO_API
void gst_audio_quantize_reset (GstAudioQuantize * quant);
GST_AUDIO_API
void gst_audio_quantize_samples (GstAudioQuantize * quant,
const gpointer in[],
gpointer out[], guint samples);
#endif /* __GST_AUDIO_QUANTIZE_H__ */
|
