diff options
| -rw-r--r-- | src/pulsecore/sample-util.c | 67 |
1 files changed, 36 insertions, 31 deletions
diff --git a/src/pulsecore/sample-util.c b/src/pulsecore/sample-util.c index 5a93367e..ac7de624 100644 --- a/src/pulsecore/sample-util.c +++ b/src/pulsecore/sample-util.c @@ -620,14 +620,15 @@ void pa_volume_memchunk( switch (spec->format) { case PA_SAMPLE_S16NE: { - int16_t *d; - size_t n; + int16_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length/sizeof(int16_t); n > 0; d++, n--) { + e = (int16_t*) ptr + c->length/sizeof(int16_t); + + for (channel = 0, d = ptr; d < e; d++) { int32_t t; t = (int32_t)(*d); @@ -642,17 +643,18 @@ void pa_volume_memchunk( } case PA_SAMPLE_S16RE: { - int16_t *d; - size_t n; + int16_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length/sizeof(int16_t); n > 0; d++, n--) { + e = (int16_t*) ptr + c->length/sizeof(int16_t); + + for (channel = 0, d = ptr; d < e; d++) { int32_t t; - t = (int32_t)(PA_INT16_SWAP(*d)); + t = (int32_t) PA_INT16_SWAP(*d); t = (t * linear[channel]) / 0x10000; t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF); *d = PA_INT16_SWAP((int16_t) t); @@ -665,14 +667,15 @@ void pa_volume_memchunk( } case PA_SAMPLE_S32NE: { - int32_t *d; - size_t n; + int32_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length/sizeof(int32_t); n > 0; d++, n--) { + e = (int32_t*) ptr + c->length/sizeof(int32_t); + + for (channel = 0, d = ptr; d < e; d++) { int64_t t; t = (int64_t)(*d); @@ -687,17 +690,18 @@ void pa_volume_memchunk( } case PA_SAMPLE_S32RE: { - int32_t *d; - size_t n; + int32_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length/sizeof(int32_t); n > 0; d++, n--) { + e = (int32_t*) ptr + c->length/sizeof(int32_t); + + for (channel = 0, d = ptr; d < e; d++) { int64_t t; - t = (int64_t)(PA_INT32_SWAP(*d)); + t = (int64_t) PA_INT32_SWAP(*d); t = (t * linear[channel]) / 0x10000; t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL); *d = PA_INT32_SWAP((int32_t) t); @@ -710,14 +714,15 @@ void pa_volume_memchunk( } case PA_SAMPLE_U8: { - uint8_t *d; - size_t n; + uint8_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length; n > 0; d++, n--) { + e = (uint8_t*) ptr + c->length; + + for (channel = 0, d = ptr; d < e; d++) { int32_t t; t = (int32_t) *d - 0x80; @@ -732,14 +737,15 @@ void pa_volume_memchunk( } case PA_SAMPLE_ULAW: { - uint8_t *d; - size_t n; + uint8_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length; n > 0; d++, n--) { + e = (uint8_t*) ptr + c->length; + + for (channel = 0, d = ptr; d < e; d++) { int32_t t; t = (int32_t) st_ulaw2linear16(*d); @@ -754,14 +760,15 @@ void pa_volume_memchunk( } case PA_SAMPLE_ALAW: { - uint8_t *d; - size_t n; + uint8_t *d, *e; unsigned channel; int32_t linear[PA_CHANNELS_MAX]; calc_linear_integer_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length; n > 0; d++, n--) { + e = (uint8_t*) ptr + c->length; + + for (channel = 0, d = ptr; d < e; d++) { int32_t t; t = (int32_t) st_alaw2linear16(*d); @@ -799,22 +806,20 @@ void pa_volume_memchunk( } case PA_SAMPLE_FLOAT32RE: { - uint32_t *d; - size_t n; + float *d, *e; unsigned channel; float linear[PA_CHANNELS_MAX]; calc_linear_float_volume(linear, volume); - for (channel = 0, d = ptr, n = c->length/sizeof(float); n > 0; d++, n--) { + e = (float*) ptr + c->length/sizeof(float); + + for (channel = 0, d = ptr; d < e; d++) { float t; - uint32_t z; - z = PA_UINT32_SWAP(*d); - t = *(float*) &z; + t = PA_FLOAT32_SWAP(*d); t *= linear[channel]; - z = *(uint32_t*) &t; - *d = PA_UINT32_SWAP(z); + *d = PA_FLOAT32_SWAP(t); if (PA_UNLIKELY(++channel >= spec->channels)) channel = 0; |