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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
#include "main.h"
#include "GainLayer.h"
#include <malloc.h>
#include <math.h>
#include <locale.h>
#include "api.h"
static void FillFloat(float *floatBuf, void *samples, size_t bps, size_t numSamples, size_t numChannels, float preamp)
{
switch (bps)
{
case 8:
{
unsigned __int8 *samples8 = (unsigned __int8 *)samples;
size_t totalSamples = numSamples * numChannels;
for (size_t x = 0; x != totalSamples; x ++)
{
floatBuf[x] = (float)(samples8[x] - 128) * preamp;
}
}
break;
case 16:
{
short *samples16 = (short *)samples;
size_t totalSamples = numSamples * numChannels;
for (size_t x = 0; x != totalSamples; x ++)
{
floatBuf[x] = (float)samples16[x] * preamp;
}
}
break;
case 24:
{
unsigned __int8 *samples8 = (unsigned __int8 *)samples;
size_t totalSamples = numSamples * numChannels;
for (size_t x = 0; x != totalSamples; x ++)
{
long temp = (((long)samples8[0]) << 8);
temp = temp | (((long)samples8[1]) << 16);
temp = temp | (((long)samples8[2]) << 24);
floatBuf[x] = (float)temp * preamp;
samples8 += 3;
}
}
break;
}
}
inline static float fastclip(float x, const float a, const float b)
{
float x1 = (float)fabs (x - a);
float x2 = (float)fabs (x - b);
x = x1 + (a + b);
x -= x2;
x *= 0.5f;
return (x);
}
#define PA_CLIP_( val, min, max )\
{ val = ((val) < (min)) ? (min) : (((val) > (max)) ? (max) : (val)); }
void Float32_To_Int16_Clip(
void *destinationBuffer, signed int destinationStride,
void *sourceBuffer, signed int sourceStride,
unsigned int count)
{
float *src = (float*)sourceBuffer;
signed short *dest = (signed short*)destinationBuffer;
while ( count-- )
{
long samp = lrint(*src);
PA_CLIP_( samp, -0x8000, 0x7FFF );
*dest = (signed short) samp;
src += sourceStride;
dest += destinationStride;
}
}
inline static void clip(double &x, double a, double b)
{
double x1 = fabs (x - a);
double x2 = fabs (x - b);
x = x1 + (a + b);
x -= x2;
x *= 0.5;
}
void Float32_To_Int24_Clip(
void *destinationBuffer, signed int destinationStride,
void *sourceBuffer, signed int sourceStride,
unsigned int count)
{
float *src = (float*)sourceBuffer;
unsigned char *dest = (unsigned char*)destinationBuffer;
while ( count-- )
{
/* convert to 32 bit and drop the low 8 bits */
double scaled = *src;
clip( scaled, -2147483648., 2147483647. );
signed long temp = (signed long) scaled;
dest[0] = (unsigned char)(temp >> 8);
dest[1] = (unsigned char)(temp >> 16);
dest[2] = (unsigned char)(temp >> 24);
src += sourceStride;
dest += destinationStride * 3;
}
}
static void FillSamples(void *samples, float *floatBuf, size_t bps, size_t numSamples, size_t numChannels)
{
switch (bps)
{
case 16:
Float32_To_Int16_Clip(samples, 1, floatBuf, 1, numSamples*numChannels);
break;
case 24:
Float32_To_Int24_Clip(samples, 1, floatBuf, 1, numSamples*numChannels);
break;
}
}
float GetGain(WMInformation *info, bool allowDefault)
{
if (AGAVE_API_CONFIG && AGAVE_API_CONFIG->GetBool(playbackConfigGroupGUID, L"replaygain", false))
{
float dB = 0, peak = 1.0f;
wchar_t gain[64]=L"", peakVal[64]=L"";
switch (AGAVE_API_CONFIG->GetUnsigned(playbackConfigGroupGUID, L"replaygain_source", 0))
{
case 0: // track
info->GetAttribute(L"replaygain_track_gain", gain, 64);
if (!gain[0] && !AGAVE_API_CONFIG->GetBool(playbackConfigGroupGUID, L"replaygain_preferred_only", false))
info->GetAttribute(L"replaygain_album_gain", gain, 64);
info->GetAttribute(L"replaygain_track_peak", peakVal, 64);
if (!peakVal[0] && !AGAVE_API_CONFIG->GetBool(playbackConfigGroupGUID, L"replaygain_preferred_only", false))
info->GetAttribute(L"replaygain_album_peak", peakVal, 64);
break;
case 1:
info->GetAttribute(L"replaygain_album_gain", gain, 64);
if (!gain[0] && !AGAVE_API_CONFIG->GetBool(playbackConfigGroupGUID, L"replaygain_preferred_only", false))
info->GetAttribute(L"replaygain_track_gain", gain, 64);
info->GetAttribute(L"replaygain_album_peak", peakVal, 64);
if (!peakVal[0] && !AGAVE_API_CONFIG->GetBool(playbackConfigGroupGUID, L"replaygain_preferred_only", false))
info->GetAttribute(L"replaygain_track_peak", peakVal, 64);
break;
}
_locale_t C_locale = WASABI_API_LNG->Get_C_NumericLocale();
if (gain[0])
{
if (gain[0] == L'+')
dB = static_cast<float>(_wtof_l(&gain[1],C_locale));
else
dB = static_cast<float>(_wtof_l(gain,C_locale));
}
else if (allowDefault)
{
dB = AGAVE_API_CONFIG->GetFloat(playbackConfigGroupGUID, L"non_replaygain", -6.0);
return powf(10.0f, dB / 20.0f);
}
if (peakVal[0])
{
peak = static_cast<float>(_wtof_l(peakVal,C_locale));
}
switch (AGAVE_API_CONFIG->GetUnsigned(playbackConfigGroupGUID, L"replaygain_mode", 1))
{
case 0: // apply gain
return powf(10.0f, dB / 20.0f);
case 1: // apply gain, but don't clip
return min(powf(10.0f, dB / 20.0f), 1.0f / peak);
case 2: // normalize
return 1.0f / peak;
case 3: // prevent clipping
if (peak > 1.0f)
return 1.0f / peak;
else
return 1.0f;
}
}
return 1.0f; // no gain
}
void GainLayer::AudioDataReceived(void *_data, unsigned long sizeBytes, DWORD timestamp)
{
if (enabled)
{
size_t samples = audio->AudioBytesToSamples(sizeBytes);
int channels = audio->Channels();
if (floatSize < (samples * channels))
{
delete [] floatData;
floatSize = samples * channels;
floatData = new float[floatSize];
}
if (outSize < sizeBytes)
{
delete [] outData;
outSize=sizeBytes;
outData = (void *)new __int8[sizeBytes];
}
FillFloat(floatData, _data, audio->BitSize(), samples , channels, replayGain);
FillSamples(outData, floatData, audio->BitSize(), samples , channels);
WMHandler::AudioDataReceived(outData, sizeBytes, timestamp);
}
else
WMHandler::AudioDataReceived(_data, sizeBytes, timestamp);
}
void GainLayer::Opened()
{
enabled= (AGAVE_API_CONFIG && AGAVE_API_CONFIG->GetBool(playbackConfigGroupGUID, L"replaygain", false));
if (enabled)
replayGain = GetGain(info, true);
WMHandler::Opened();
}
|
