forked from RebelTechnology/OwlProgram
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathSampleBuffer.hpp
More file actions
185 lines (177 loc) · 4.72 KB
/
SampleBuffer.hpp
File metadata and controls
185 lines (177 loc) · 4.72 KB
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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
#ifndef __SAMPLEBUFFER_H__
#define __SAMPLEBUFFER_H__
#include <stdint.h>
#include "Patch.h"
#include "device.h"
#ifdef ARM_CORTEX
#include "arm_math.h"
#define AUDIO_SATURATE_SAMPLES
#else
#undef AUDIO_SATURATE_SAMPLES
#endif //ARM_CORTEX
#define MULTIPLIER_31B 0x80000000
#define MULTIPLIER_30B 0x40000000
#define MULTIPLIER_23B 0x00800000
class SampleBuffer : public AudioBuffer {
protected:
const size_t channels;
const size_t blocksize;
FloatArray* buffers;
public:
SampleBuffer(size_t channels, size_t blocksize)
:channels(channels), blocksize(blocksize) {
buffers = new FloatArray[channels];
for(size_t i=0; i<channels; ++i)
buffers[i] = FloatArray::create(blocksize);
}
~SampleBuffer(){
for(size_t i=0; i<channels; ++i)
FloatArray::destroy(buffers[i]);
delete[] buffers;
}
virtual void split(int32_t* input) = 0;
virtual void comb(int32_t* output) = 0;
void clear(){
for(size_t i=0; i<channels; ++i)
buffers[i].clear();
}
inline FloatArray getSamples(int channel){
if(channel < channels)
return buffers[channel];
return FloatArray();
}
inline int getChannels(){
return channels;
}
inline int getSize(){
return blocksize;
}
static SampleBuffer* create(uint8_t format, size_t blocksize);
static void destroy(SampleBuffer* obj){
delete obj;
}
};
class SampleBuffer32 : public SampleBuffer {
public:
SampleBuffer32(size_t channels, size_t blocksize) : SampleBuffer(channels, blocksize){}
void split(int32_t* input){
const float mul = 1.0f/MULTIPLIER_31B;
for(size_t j=0; j<channels; ++j){
float* dst = buffers[j];
int32_t* src = input+j;
size_t len = blocksize;
while(len--){
*dst++ = (*src << 8) * mul;
src += channels;
}
}
}
void comb(int32_t* output){
const float mul = MULTIPLIER_23B;
for(size_t j=0; j<channels; ++j){
float* src = buffers[j];
int32_t* dst = output+j;
size_t len = blocksize;
while(len--){
#ifdef AUDIO_SATURATE_SAMPLES
*dst = __SSAT((q31_t)(*src++ * mul), 24);
#else
*dst = ((int32_t)(*src++ * mul));
#endif
dst += channels;
}
}
}
};
class SampleBuffer24 : public SampleBuffer {
public:
SampleBuffer24(size_t channels, size_t blocksize) : SampleBuffer(channels, blocksize){}
void split(int32_t* data){
const float mul = 1.0f/MULTIPLIER_31B;
uint8_t* input = (uint8_t*)data;
int32_t qint;
for(size_t i=0; i<blocksize; ++i){
qint =( *input++)<<16;
qint |= (*input++)<<24;
qint |= (*input++);
qint |= (*input++)<<8;
buffers[0][i] = qint * mul;
qint =( *input++)<<16;
qint |= (*input++)<<24;
qint |= (*input++);
qint |= (*input++)<<8;
buffers[1][i] = qint * mul;
}
}
void comb(int32_t* output){
uint8_t* dest = (uint8_t*)output;
int32_t qint;
for(size_t i=0; i<blocksize; ++i){
#ifdef AUDIO_SATURATE_SAMPLES
qint = __SSAT((q31_t)(buffers[0][i] * MULTIPLIER_23B), 24);
#else
qint = buffers[0][i] * MULTIPLIER_23B;
#endif
*dest++ = qint >> 24;
*dest++ = qint >> 16;
*dest++ = qint >> 8;
*dest++ = qint;
#ifdef AUDIO_SATURATE_SAMPLES
qint = __SSAT((q31_t)(buffers[1][i] * MULTIPLIER_23B), 24);
#else
qint = buffers[1][i] * MULTIPLIER_23B;
#endif
*dest++ = qint >> 24;
*dest++ = qint >> 16;
*dest++ = qint >> 8;
*dest++ = qint;
}
}
};
class SampleBuffer16 : public SampleBuffer {
public:
SampleBuffer16(size_t channels, size_t blocksize) : SampleBuffer(channels, blocksize){}
void split(int32_t* data){
const float mul = 1.0f/MULTIPLIER_31B;
uint16_t* input = (uint16_t*)data;
int32_t qint;
for(size_t i=0; i<blocksize; ++i){
qint = (*input++)<<16;
qint |= *input++;
buffers[0][i] = qint * mul;
qint = (*input++)<<16;
qint |= *input++;
buffers[1][i] = qint * mul;
}
}
void comb(int32_t* output){
float* l = (float*)buffers[0];
float* r = (float*)buffers[1];
uint32_t blkCnt = blocksize;
uint16_t* dst = (uint16_t*)output;
int32_t qint;
while(blkCnt > 0u){
qint = *l++ * MULTIPLIER_31B;
*dst++ = qint >> 16;
*dst++ = qint & 0xffff;
qint = *r++ * MULTIPLIER_31B;
*dst++ = qint >> 16;
*dst++ = qint & 0xffff;
blkCnt--;
}
}
};
SampleBuffer* SampleBuffer::create(uint8_t format, size_t blocksize){
size_t channels = format & AUDIO_FORMAT_CHANNEL_MASK;
if(channels == 0)
channels = 2;
switch(format & AUDIO_FORMAT_FORMAT_MASK){
case AUDIO_FORMAT_24B16:
return new SampleBuffer16(channels, blocksize);
case AUDIO_FORMAT_24B32:
return new SampleBuffer32(channels, blocksize);
default:
return NULL; // unrecognised audio format
}
}
#endif // __SAMPLEBUFFER_H__