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
|
/*
Copyright (C) 2006 Jesse Chappell <jesse@essej.net> (AC3Jack)
Copyright (C) 2012 Grame
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __JackAC3Encoder__
#define __JackAC3Encoder__
#include <aften/aften.h>
#include <aften/aften-types.h>
#include "ringbuffer.h"
#include "types.h"
#define MAX_AC3_CHANNELS 6
#define SPDIF_HEADER_SIZE 8
#define SPDIF_FRAME_SIZE 6144
#define SAMPLE_MAX_16BIT 32768.0f
#define SAMPLE_MAX_24BIT 8388608.0f
namespace Jack
{
struct JackAC3EncoderParams
{
int64_t duration;
unsigned int channels;
int bitdepth;
int bitrate;
unsigned int sample_rate;
bool lfe;
};
class JackAC3Encoder
{
private:
AftenContext fAftenContext;
jack_ringbuffer_t* fRingBuffer;
float* fSampleBuffer;
unsigned char* fAC3Buffer;
unsigned char* fZeroBuffer;
int fOutSizeByte;
jack_nframes_t fFramePos;
jack_nframes_t fSampleRate;
jack_nframes_t fByteRate;
void FillSpdifHeader(unsigned char* buf, int outsize);
int Output2Driver(float** outputs, jack_nframes_t nframes);
void sample_move_dS_s16(jack_default_audio_sample_t* dst, char *src, jack_nframes_t nsamples, unsigned long src_skip);
void sample_move_dS_s16_24ph(jack_default_audio_sample_t* dst, char *src, jack_nframes_t nsamples, unsigned long src_skip);
public:
#ifdef __ppc__
JackAC3Encoder(const JackAC3EncoderParams& params) {}
virtual ~JackAC3Encoder() {}
bool Init(jack_nframes_t sample_rate) {return false;}
void Process(float** inputs, float** outputs, int nframes) {}
void GetChannelName(const char* name, const char* alias, char* portname, int channel) {}
#else
JackAC3Encoder(const JackAC3EncoderParams& params);
virtual ~JackAC3Encoder();
bool Init(jack_nframes_t sample_rate);
void Process(float** inputs, float** outputs, int nframes);
void GetChannelName(const char* name, const char* alias, char* portname, int channel);
#endif
};
typedef JackAC3Encoder * JackAC3EncoderPtr;
} // end of namespace
#endif
|
