mirror/miniaudio
1
0
Fork 0
mirror of https://github.com/mackron/miniaudio.git synced 2026-04-23 16:54:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

Improve auto-generation of format conversion routines.

Browse Source
This commit is contained in:
David Reid
2017-11-16 21:36:04 +10:00
parent 77128b0a05
commit 0a69454845
3 changed files with 36 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mini_al.h
+1 -51
View File
@@ -10273,9 +10273,6 @@ void mal_blend_f32(float* pOut, float* pInA, float* pInB, float factor, mal_uint
//
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#if 0
#include "tools/malgen/bin/malgen_test0.c"
#else
void mal_pcm_u8_to_s16(short* pOut, const unsigned char* pIn, unsigned int count)
{
int r;
@@ -10442,19 +10439,10 @@ void mal_pcm_s32_to_f32(float* pOut, const int* pIn, unsigned int count)
float r;
for (unsigned int i = 0; i < count; ++i) {
int x = pIn[i];
#if 1
double t;
t = (double)(x + 2147483648);
t = t * 0.0000000004656612873077392578125;
r = (float)(t - 1);
#else
int s;
s = ((*((int*)&x)) & 0x80000000) >> 31;
s = s + 2147483647;
r = x / (float)(unsigned int)s;
#endif
pOut[i] = (float)r;
}
}
@@ -10466,18 +10454,8 @@ void mal_pcm_f32_to_u8(unsigned char* pOut, const float* pIn, unsigned int count
float x = pIn[i];
float c;
c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
#if 1
c = c + 1;
r = (int)(c * 127.5f);
#else
int s;
s = ((*((int*)&x)) & 0x80000000) >> 31;
s = s + 127;
r = (int)(c * s);
r = r + 128;
#endif
pOut[i] = (unsigned char)r;
}
}
@@ -10489,18 +10467,9 @@ void mal_pcm_f32_to_s16(short* pOut, const float* pIn, unsigned int count)
float x = pIn[i];
float c;
c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
#if 1
c = c + 1;
r = (int)(c * 32767.5f);
r = r - 32768;
#else
int s;
s = ((*((int*)&x)) & 0x80000000) >> 31;
s = s + 32767;
r = (int)(c * s);
#endif
pOut[i] = (short)r;
}
}
@@ -10512,18 +10481,9 @@ void mal_pcm_f32_to_s24(void* pOut, const float* pIn, unsigned int count)
float x = pIn[i];
float c;
c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
#if 1
c = c + 1;
r = (int)(c * 8388607.5f);
r = r - 8388608;
#else
int s;
s = ((*((int*)&x)) & 0x80000000) >> 31;
s = s + 8388607;
r = (int)(c * s);
#endif
((unsigned char*)pOut)[(i*3)+0] = (unsigned char)(r & 0xFF); ((unsigned char*)pOut)[(i*3)+1] = (unsigned char)((r & 0xFF00) >> 8); ((unsigned char*)pOut)[(i*3)+2] = (unsigned char)((r & 0xFF0000) >> 16);
}
}
@@ -10534,24 +10494,14 @@ void mal_pcm_f32_to_s32(int* pOut, const float* pIn, unsigned int count)
for (unsigned int i = 0; i < count; ++i) {
float x = pIn[i];
float c;
c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
#if 1
mal_int64 t;
c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
c = c + 1;
t = (mal_int64)(c * 2147483647.5);
r = (int)(t - 2147483648);
#else
mal_int64 s;
s = ((*((int*)&x)) & 0x80000000) >> 31;
s = s + 2147483647;
r = (int)(c * s);
#endif
pOut[i] = (int)r;
}
}
#endif
#endif