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make module-sine-source actually work

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This commit is contained in:
Lennart Poettering 2009-01-10 03:33:10 +01:00
parent 4e8ada521a
commit 8a3dc57df2
1 changed files with 18 additions and 7 deletions
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25
src/modules/module-sine-source.c
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@ -129,7 +129,7 @@ static void source_update_requested_latency_cb(pa_source *s) {
if (u->block_usec == (pa_usec_t) -1)
u->block_usec = s->thread_info.max_latency;
pa_log("new block msec = %lu", (unsigned long) (u->block_usec / PA_USEC_PER_MSEC));
pa_log_debug("new block msec = %lu", (unsigned long) (u->block_usec / PA_USEC_PER_MSEC));
}
static void process_render(struct userdata *u, pa_usec_t now) {
@ -147,7 +147,6 @@ static void process_render(struct userdata *u, pa_usec_t now) {
pa_log_debug("posting %lu", (unsigned long) chunk.length);
pa_source_post(u->source, &chunk);
pa_memchunk_dump_to_file(&chunk, "sine");
u->peek_index += chunk.length;
while (u->peek_index >= u->memchunk.length)
@ -208,7 +207,7 @@ static void calc_sine(float *f, size_t l, double freq) {
l /= sizeof(float);
for (i = 0; i < l; i++)
f[i] = (float) sin((double) i/(double)l*M_PI*2*freq)/2;
*(f++) = (float) 0.5f * sin((double) i*M_PI*2*freq / (double) l);
}
int pa__init(pa_module*m) {
@ -218,6 +217,8 @@ int pa__init(pa_module*m) {
uint32_t frequency;
pa_sample_spec ss;
void *p;
unsigned n, d;
size_t l;
pa_assert(m);
@ -249,12 +250,22 @@ int pa__init(pa_module*m) {
u->peek_index = 0;
pa_memchunk_reset(&u->memchunk);
u->memchunk.memblock = pa_memblock_new(m->core->mempool, (size_t) -1);
u->memchunk.length = pa_frame_align(pa_memblock_get_length(u->memchunk.memblock), &ss);
n = ss.rate;
d = frequency;
pa_reduce(&n, &d);
l = pa_mempool_block_size_max(m->core->mempool) / pa_frame_size(&ss);
l /= n;
if (l <= 0) l = 1;
l *= n;
u->memchunk.length = l * pa_frame_size(&ss);
u->memchunk.memblock = pa_memblock_new(m->core->mempool, u->memchunk.length);
p = pa_memblock_acquire(u->memchunk.memblock);
calc_sine(p, u->memchunk.length,
(double) frequency * (double) pa_bytes_to_usec(u->memchunk.length, &ss) / (double) PA_USEC_PER_SEC);
calc_sine(p, u->memchunk.length, pa_bytes_to_usec(u->memchunk.length, &ss) * frequency / PA_USEC_PER_SEC);
pa_memblock_release(u->memchunk.memblock);
pa_source_new_data_init(&data);