diff options
Diffstat (limited to 'src/AudioCompress/compress.c')
| -rw-r--r-- | src/AudioCompress/compress.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/src/AudioCompress/compress.c b/src/AudioCompress/compress.c index d5c08372c..36cdfd8dd 100644 --- a/src/AudioCompress/compress.c +++ b/src/AudioCompress/compress.c @@ -16,16 +16,16 @@ struct Compressor { //! The compressor's preferences struct CompressorConfig prefs; - + //! History of the peak values int *peaks; - + //! History of the gain values int *gain; - + //! History of clip amounts int *clipped; - + unsigned int pos; unsigned int bufsz; }; @@ -41,9 +41,9 @@ struct Compressor *Compressor_new(unsigned int history) obj->peaks = obj->gain = obj->clipped = NULL; obj->bufsz = 0; obj->pos = 0; - + Compressor_setHistory(obj, history); - + return obj; } @@ -70,7 +70,7 @@ void Compressor_setHistory(struct Compressor *obj, unsigned int history) { if (!history) history = BUCKETS; - + obj->peaks = resizeArray(obj->peaks, history, obj->bufsz); obj->gain = resizeArray(obj->gain, history, obj->bufsz); obj->clipped = resizeArray(obj->clipped, history, obj->bufsz); @@ -82,7 +82,7 @@ struct CompressorConfig *Compressor_getConfig(struct Compressor *obj) return &obj->prefs; } -void Compressor_Process_int16(struct Compressor *obj, int16_t *audio, +void Compressor_Process_int16(struct Compressor *obj, int16_t *audio, unsigned int count) { struct CompressorConfig *prefs = Compressor_getConfig(obj); @@ -97,7 +97,7 @@ void Compressor_Process_int16(struct Compressor *obj, int16_t *audio, int *clipped = obj->clipped + slot; unsigned int ramp = count; int delta; - + ap = audio; for (i = 0; i < count; i++) { @@ -124,15 +124,15 @@ void Compressor_Process_int16(struct Compressor *obj, int16_t *audio, //! Determine target gain newGain = (1 << 10)*prefs->target/peakVal; - + //! Adjust the gain with inertia from the previous gain value - newGain = (curGain*((1 << prefs->smooth) - 1) + newGain) + newGain = (curGain*((1 << prefs->smooth) - 1) + newGain) >> prefs->smooth; - + //! Make sure it's no more than the maximum gain value if (newGain > (prefs->maxgain << 10)) newGain = prefs->maxgain << 10; - + //! Make sure it's no less than 1:1 if (newGain < (1 << 10)) newGain = 1 << 10; @@ -144,7 +144,7 @@ void Compressor_Process_int16(struct Compressor *obj, int16_t *audio, //! Truncate the ramp time ramp = peakPos; } - + //! Record the new gain obj->gain[slot] = newGain; |