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Added simple volume meter. Updated per comments Pull Req #90

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This commit is contained in:
Danni 2014-05-24 16:42:54 -07:00
parent 90d9a5204f
commit 9c3fb4b8dc
1 changed files with 4 additions and 17 deletions
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21
libobs/media-io/audio-io.c
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@ -711,16 +711,10 @@ uint32_t audio_output_samplerate(audio_t audio)
return audio ? audio->info.samples_per_sec : 0;
}
/* On some platforms, max() may already be defined */
#ifndef max
#define max(a, b) ((a) > (b) ? (a) : (b))
#endif
/* TODO: Optimization of volume multiplication functions */
static inline int mul_vol_u8bit(void *array, float volume, size_t total_num)
{
int maxVol = 0;
uint8_t *vals = array;
int32_t vol = (int32_t)(volume * 127.0f);
@ -728,23 +722,20 @@ static inline int mul_vol_u8bit(void *array, float volume, size_t total_num)
int32_t val = (int32_t)vals[i] - 128;
int32_t output = val * vol / 127;
vals[i] = (uint8_t)(CLAMP(output, MIN_S8, MAX_S8) + 128);
maxVol = max(maxVol, abs(vals[i]));
}
return maxVol * (10000 / MAX_S8);
return 0;
}
static inline int mul_vol_16bit(void *array, float volume, size_t total_num)
{
int maxVol = 0;
uint16_t *vals = array;
int64_t vol = (int64_t)(volume * 32767.0f);
for (size_t i = 0; i < total_num; i++) {
int64_t output = (int64_t)vals[i] * vol / 32767;
vals[i] = (int32_t)CLAMP(output, MIN_S16, MAX_S16);
maxVol = max(maxVol, abs(vals[i]));
}
return maxVol * (10000 / MAX_S16);
return 0;
}
static inline float conv_24bit_to_float(uint8_t *vals)
@ -769,21 +760,18 @@ static inline void conv_float_to_24bit(float fval, uint8_t *vals)
static inline int mul_vol_24bit(void *array, float volume, size_t total_num)
{
float maxVol = 0.f;
uint8_t *vals = array;
for (size_t i = 0; i < total_num; i++) {
float val = conv_24bit_to_float(vals) * volume;
conv_float_to_24bit(CLAMP(val, -1.0f, 1.0f), vals);
vals += 3;
maxVol = max(maxVol, (float)fabs(val));
}
return (int) (maxVol * 10000.f);
return 0;
}
static inline int mul_vol_32bit(void *array, float volume, size_t total_num)
{
int maxVol = 0;
int32_t *vals = array;
double dvol = (double)volume;
@ -791,9 +779,8 @@ static inline int mul_vol_32bit(void *array, float volume, size_t total_num)
double val = (double)vals[i] / 2147483647.0;
double output = val * dvol;
vals[i] = (int32_t)(CLAMP(output, -1.0, 1.0) * 2147483647.0);
maxVol = max(maxVol, abs(vals[i]));
}
return maxVol * (10000 / MAX_S32);
return 0;
}
static inline int mul_vol_float(void *array, float volume, size_t total_num)