PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
- by the Free Software Foundation; either version 2 of the License,
+ by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
#include <config.h>
#endif
-#include <stdio.h>
#include <string.h>
#include <stdlib.h>
-
-#include <liboil/liboilfuncs.h>
-#include <liboil/liboil.h>
+#include <stdio.h>
+#include <errno.h>
+#include <math.h>
#include <pulse/timeval.h>
#include <pulsecore/log.h>
+#include <pulsecore/core-error.h>
#include <pulsecore/macro.h>
#include <pulsecore/g711.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/endianmacros.h>
#include "sample-util.h"
-#include "endianmacros.h"
#define PA_SILENCE_MAX (PA_PAGE_SIZE*16)
case PA_SAMPLE_S32BE:
case PA_SAMPLE_FLOAT32LE:
case PA_SAMPLE_FLOAT32BE:
+ case PA_SAMPLE_S24LE:
+ case PA_SAMPLE_S24BE:
+ case PA_SAMPLE_S24_32LE:
+ case PA_SAMPLE_S24_32BE:
return 0;
case PA_SAMPLE_ALAW:
return 0xd5;
return p;
}
-static void calc_linear_integer_volume(int32_t linear[], const pa_cvolume *volume) {
- unsigned channel;
-
- pa_assert(linear);
- pa_assert(volume);
-
- for (channel = 0; channel < volume->channels; channel++)
- linear[channel] = (int32_t) lrint(pa_sw_volume_to_linear(volume->values[channel]) * 0x10000);
-}
-
-static void calc_linear_float_volume(float linear[], const pa_cvolume *volume) {
- unsigned channel;
-
- pa_assert(linear);
- pa_assert(volume);
-
- for (channel = 0; channel < volume->channels; channel++)
- linear[channel] = (float) pa_sw_volume_to_linear(volume->values[channel]);
-}
-
-static void calc_linear_integer_stream_volumes(pa_mix_info streams[], unsigned nstreams, const pa_cvolume *volume, const pa_sample_spec *spec) {
- unsigned k, channel;
- float linear[PA_CHANNELS_MAX];
-
- pa_assert(streams);
- pa_assert(spec);
- pa_assert(volume);
-
- calc_linear_float_volume(linear, volume);
-
- for (k = 0; k < nstreams; k++) {
-
- for (channel = 0; channel < spec->channels; channel++) {
- pa_mix_info *m = streams + k;
- m->linear[channel].i = (int32_t) lrint(pa_sw_volume_to_linear(m->volume.values[channel]) * linear[channel] * 0x10000);
- }
- }
-}
-
-static void calc_linear_float_stream_volumes(pa_mix_info streams[], unsigned nstreams, const pa_cvolume *volume, const pa_sample_spec *spec) {
- unsigned k, channel;
- float linear[PA_CHANNELS_MAX];
-
- pa_assert(streams);
- pa_assert(spec);
- pa_assert(volume);
-
- calc_linear_float_volume(linear, volume);
-
- for (k = 0; k < nstreams; k++) {
-
- for (channel = 0; channel < spec->channels; channel++) {
- pa_mix_info *m = streams + k;
- m->linear[channel].f = (float) (pa_sw_volume_to_linear(m->volume.values[channel]) * linear[channel]);
- }
- }
-}
-
-size_t pa_mix(
- pa_mix_info streams[],
- unsigned nstreams,
- void *data,
- size_t length,
- const pa_sample_spec *spec,
- const pa_cvolume *volume,
- pa_bool_t mute) {
-
- pa_cvolume full_volume;
- unsigned k;
- unsigned z;
- void *end;
-
- pa_assert(streams);
- pa_assert(data);
- pa_assert(length);
- pa_assert(spec);
-
- if (!volume)
- volume = pa_cvolume_reset(&full_volume, spec->channels);
-
- if (mute || pa_cvolume_is_muted(volume) || nstreams <= 0) {
- pa_silence_memory(data, length, spec);
- return length;
- }
-
- for (k = 0; k < nstreams; k++)
- streams[k].ptr = (uint8_t*) pa_memblock_acquire(streams[k].chunk.memblock) + streams[k].chunk.index;
-
- for (z = 0; z < nstreams; z++)
- if (length > streams[z].chunk.length)
- length = streams[z].chunk.length;
-
- end = (uint8_t*) data + length;
-
- switch (spec->format) {
-
- case PA_SAMPLE_S16NE:{
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int32_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t v, cv = m->linear[channel].i;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = *((int16_t*) m->ptr);
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + sizeof(int16_t);
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
- *((int16_t*) data) = (int16_t) sum;
-
- data = (uint8_t*) data + sizeof(int16_t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_S16RE:{
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int32_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t v, cv = m->linear[channel].i;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = PA_INT16_SWAP(*((int16_t*) m->ptr));
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + sizeof(int16_t);
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
- *((int16_t*) data) = PA_INT16_SWAP((int16_t) sum);
-
- data = (uint8_t*) data + sizeof(int16_t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_S32NE:{
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int64_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t cv = m->linear[channel].i;
- int64_t v;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = *((int32_t*) m->ptr);
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + sizeof(int32_t);
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x80000000LL, 0x7FFFFFFFLL);
- *((int32_t*) data) = (int32_t) sum;
-
- data = (uint8_t*) data + sizeof(int32_t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_S32RE:{
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int64_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t cv = m->linear[channel].i;
- int64_t v;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = PA_INT32_SWAP(*((int32_t*) m->ptr));
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + sizeof(int32_t);
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x80000000LL, 0x7FFFFFFFLL);
- *((int32_t*) data) = PA_INT32_SWAP((int32_t) sum);
-
- data = (uint8_t*) data + sizeof(int32_t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_U8: {
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int32_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t v, cv = m->linear[channel].i;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = (int32_t) *((uint8_t*) m->ptr) - 0x80;
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + 1;
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x80, 0x7F);
- *((uint8_t*) data) = (uint8_t) (sum + 0x80);
-
- data = (uint8_t*) data + 1;
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_ULAW: {
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int32_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t v, cv = m->linear[channel].i;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = (int32_t) st_ulaw2linear16(*((uint8_t*) m->ptr));
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + 1;
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
- *((uint8_t*) data) = (uint8_t) st_14linear2ulaw((int16_t) sum >> 2);
-
- data = (uint8_t*) data + 1;
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_ALAW: {
- unsigned channel = 0;
-
- calc_linear_integer_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- int32_t sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- int32_t v, cv = m->linear[channel].i;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = (int32_t) st_alaw2linear16(*((uint8_t*) m->ptr));
- v = (v * cv) / 0x10000;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + 1;
- }
-
- sum = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
- *((uint8_t*) data) = (uint8_t) st_13linear2alaw((int16_t) sum >> 3);
-
- data = (uint8_t*) data + 1;
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_FLOAT32NE: {
- unsigned channel = 0;
-
- calc_linear_float_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- float sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- float v, cv = m->linear[channel].f;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = *((float*) m->ptr);
- v *= cv;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + sizeof(float);
- }
-
- *((float*) data) = sum;
-
- data = (uint8_t*) data + sizeof(float);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_FLOAT32RE: {
- unsigned channel = 0;
- float linear[PA_CHANNELS_MAX];
-
- calc_linear_float_stream_volumes(streams, nstreams, volume, spec);
-
- while (data < end) {
- float sum = 0;
- unsigned i;
-
- for (i = 0; i < nstreams; i++) {
- pa_mix_info *m = streams + i;
- float v, cv = m->linear[channel].f;
-
- if (PA_UNLIKELY(cv <= 0))
- continue;
-
- v = PA_FLOAT32_SWAP(*(float*) m->ptr);
- v *= cv;
- sum += v;
-
- m->ptr = (uint8_t*) m->ptr + sizeof(float);
- }
-
- *((float*) data) = PA_FLOAT32_SWAP(sum);
-
- data = (uint8_t*) data + sizeof(float);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- default:
- pa_log_error("Unable to mix audio data of format %s.", pa_sample_format_to_string(spec->format));
- pa_assert_not_reached();
- }
-
- for (k = 0; k < nstreams; k++)
- pa_memblock_release(streams[k].chunk.memblock);
-
- return length;
-}
-
-
-void pa_volume_memchunk(
- pa_memchunk*c,
- const pa_sample_spec *spec,
- const pa_cvolume *volume) {
-
- void *ptr;
-
- pa_assert(c);
- pa_assert(spec);
- pa_assert(c->length % pa_frame_size(spec) == 0);
- pa_assert(volume);
-
- if (pa_memblock_is_silence(c->memblock))
- return;
-
- if (pa_cvolume_channels_equal_to(volume, PA_VOLUME_NORM))
- return;
-
- if (pa_cvolume_channels_equal_to(volume, PA_VOLUME_MUTED)) {
- pa_silence_memchunk(c, spec);
- return;
- }
-
- ptr = (uint8_t*) pa_memblock_acquire(c->memblock) + c->index;
-
- switch (spec->format) {
-
- case PA_SAMPLE_S16NE: {
- int16_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- e = (int16_t*) ptr + c->length/sizeof(int16_t);
-
- for (channel = 0, d = ptr; d < e; d++) {
- int32_t t;
-
- t = (int32_t)(*d);
- t = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
- *d = (int16_t) t;
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
- break;
- }
-
- case PA_SAMPLE_S16RE: {
- int16_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- 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 = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
- *d = PA_INT16_SWAP((int16_t) t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_S32NE: {
- int32_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- e = (int32_t*) ptr + c->length/sizeof(int32_t);
-
- for (channel = 0, d = ptr; d < e; d++) {
- int64_t t;
-
- t = (int64_t)(*d);
- t = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
- *d = (int32_t) t;
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
- break;
- }
-
- case PA_SAMPLE_S32RE: {
- int32_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- 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 = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
- *d = PA_INT32_SWAP((int32_t) t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
- case PA_SAMPLE_U8: {
- uint8_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- e = (uint8_t*) ptr + c->length;
-
- for (channel = 0, d = ptr; d < e; d++) {
- int32_t t;
-
- t = (int32_t) *d - 0x80;
- t = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x80, 0x7F);
- *d = (uint8_t) (t + 0x80);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
- break;
- }
-
- case PA_SAMPLE_ULAW: {
- uint8_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- e = (uint8_t*) ptr + c->length;
-
- for (channel = 0, d = ptr; d < e; d++) {
- int32_t t;
-
- t = (int32_t) st_ulaw2linear16(*d);
- t = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
- *d = (uint8_t) st_14linear2ulaw((int16_t) t >> 2);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
- break;
- }
-
- case PA_SAMPLE_ALAW: {
- uint8_t *d, *e;
- unsigned channel;
- int32_t linear[PA_CHANNELS_MAX];
-
- calc_linear_integer_volume(linear, volume);
-
- e = (uint8_t*) ptr + c->length;
-
- for (channel = 0, d = ptr; d < e; d++) {
- int32_t t;
-
- t = (int32_t) st_alaw2linear16(*d);
- t = (t * linear[channel]) / 0x10000;
- t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
- *d = (uint8_t) st_13linear2alaw((int16_t) t >> 3);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
- break;
- }
-
- case PA_SAMPLE_FLOAT32NE: {
- float *d;
- int skip;
- unsigned n;
- unsigned channel;
-
- d = ptr;
- skip = (int) (spec->channels * sizeof(float));
- n = (unsigned) (c->length/sizeof(float)/spec->channels);
-
- for (channel = 0; channel < spec->channels; channel ++) {
- float v, *t;
-
- if (PA_UNLIKELY(volume->values[channel] == PA_VOLUME_NORM))
- continue;
-
- v = (float) pa_sw_volume_to_linear(volume->values[channel]);
- t = d + channel;
- oil_scalarmult_f32(t, skip, t, skip, &v, (int) n);
- }
- break;
- }
-
- case PA_SAMPLE_FLOAT32RE: {
- float *d, *e;
- unsigned channel;
- float linear[PA_CHANNELS_MAX];
-
- calc_linear_float_volume(linear, volume);
-
- e = (float*) ptr + c->length/sizeof(float);
-
- for (channel = 0, d = ptr; d < e; d++) {
- float t;
-
- t = PA_FLOAT32_SWAP(*d);
- t *= linear[channel];
- *d = PA_FLOAT32_SWAP(t);
-
- if (PA_UNLIKELY(++channel >= spec->channels))
- channel = 0;
- }
-
- break;
- }
-
-
- default:
- pa_log_warn(" Unable to change volume of format %s.", pa_sample_format_to_string(spec->format));
- /* If we cannot change the volume, we just don't do it */
- }
-
- pa_memblock_release(c->memblock);
-}
-
size_t pa_frame_align(size_t l, const pa_sample_spec *ss) {
size_t fs;
return (l/fs) * fs;
}
-pa_bool_t pa_frame_aligned(size_t l, const pa_sample_spec *ss) {
+bool pa_frame_aligned(size_t l, const pa_sample_spec *ss) {
size_t fs;
pa_assert(ss);
d = (uint8_t*) dst + c * ss;
for (j = 0; j < n; j ++) {
- oil_memcpy(d, s, (int) ss);
+ memcpy(d, s, (int) ss);
s = (uint8_t*) s + ss;
d = (uint8_t*) d + fs;
}
d = dst[c];
for (j = 0; j < n; j ++) {
- oil_memcpy(d, s, (int) ss);
+ memcpy(d, s, (int) ss);
s = (uint8_t*) s + fs;
d = (uint8_t*) d + ss;
}
memset(data, c, length);
pa_memblock_release(b);
- pa_memblock_set_is_silence(b, TRUE);
+ pa_memblock_set_is_silence(b, true);
return b;
}
case PA_SAMPLE_S16BE:
case PA_SAMPLE_S32LE:
case PA_SAMPLE_S32BE:
+ case PA_SAMPLE_S24LE:
+ case PA_SAMPLE_S24BE:
+ case PA_SAMPLE_S24_32LE:
+ case PA_SAMPLE_S24_32BE:
case PA_SAMPLE_FLOAT32LE:
case PA_SAMPLE_FLOAT32BE:
cache->blocks[PA_SAMPLE_S16LE] = b = silence_memblock_new(pool, 0);
cache->blocks[PA_SAMPLE_S16BE] = pa_memblock_ref(b);
cache->blocks[PA_SAMPLE_S32LE] = pa_memblock_ref(b);
cache->blocks[PA_SAMPLE_S32BE] = pa_memblock_ref(b);
+ cache->blocks[PA_SAMPLE_S24LE] = pa_memblock_ref(b);
+ cache->blocks[PA_SAMPLE_S24BE] = pa_memblock_ref(b);
+ cache->blocks[PA_SAMPLE_S24_32LE] = pa_memblock_ref(b);
+ cache->blocks[PA_SAMPLE_S24_32BE] = pa_memblock_ref(b);
cache->blocks[PA_SAMPLE_FLOAT32LE] = pa_memblock_ref(b);
cache->blocks[PA_SAMPLE_FLOAT32BE] = pa_memblock_ref(b);
break;
s = src; d = dst;
if (format == PA_SAMPLE_FLOAT32NE) {
+ for (; n > 0; n--) {
+ float f;
- float minus_one = -1.0, plus_one = 1.0;
- oil_clip_f32(d, (int) dstr, s, (int) sstr, (int) n, &minus_one, &plus_one);
+ f = *s;
+ *d = PA_CLAMP_UNLIKELY(f, -1.0f, 1.0f);
+ s = (const float*) ((const uint8_t*) s + sstr);
+ d = (float*) ((uint8_t*) d + dstr);
+ }
} else {
pa_assert(format == PA_SAMPLE_FLOAT32RE);
return (size_t) u;
}
+
+void pa_memchunk_dump_to_file(pa_memchunk *c, const char *fn) {
+ FILE *f;
+ void *p;
+
+ pa_assert(c);
+ pa_assert(fn);
+
+ /* Only for debugging purposes */
+
+ f = pa_fopen_cloexec(fn, "a");
+
+ if (!f) {
+ pa_log_warn("Failed to open '%s': %s", fn, pa_cstrerror(errno));
+ return;
+ }
+
+ p = pa_memblock_acquire(c->memblock);
+
+ if (fwrite((uint8_t*) p + c->index, 1, c->length, f) != c->length)
+ pa_log_warn("Failed to write to '%s': %s", fn, pa_cstrerror(errno));
+
+ pa_memblock_release(c->memblock);
+
+ fclose(f);
+}
+
+static void calc_sine(float *f, size_t l, double freq) {
+ size_t i;
+
+ l /= sizeof(float);
+
+ for (i = 0; i < l; i++)
+ *(f++) = (float) 0.5f * sin((double) i*M_PI*2*freq / (double) l);
+}
+
+void pa_memchunk_sine(pa_memchunk *c, pa_mempool *pool, unsigned rate, unsigned freq) {
+ size_t l;
+ unsigned gcd, n;
+ void *p;
+
+ pa_memchunk_reset(c);
+
+ gcd = pa_gcd(rate, freq);
+ n = rate / gcd;
+
+ l = pa_mempool_block_size_max(pool) / sizeof(float);
+
+ l /= n;
+ if (l <= 0) l = 1;
+ l *= n;
+
+ c->length = l * sizeof(float);
+ c->memblock = pa_memblock_new(pool, c->length);
+
+ p = pa_memblock_acquire(c->memblock);
+ calc_sine(p, c->length, freq * l / rate);
+ pa_memblock_release(c->memblock);
+}
+
+size_t pa_convert_size(size_t size, const pa_sample_spec *from, const pa_sample_spec *to) {
+ pa_usec_t usec;
+
+ pa_assert(from);
+ pa_assert(to);
+
+ usec = pa_bytes_to_usec_round_up(size, from);
+ return pa_usec_to_bytes_round_up(usec, to);
+}