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#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "sink.h"
#include "sinkinput.h"
#define MAX_MIX_CHANNELS 32
struct sink* sink_new(struct core *core, const char *name, const struct sample_spec *spec) {
struct sink *s;
char *n = NULL;
int r;
assert(core && spec);
s = malloc(sizeof(struct sink));
assert(s);
s->name = name ? strdup(name) : NULL;
s->core = core;
s->sample_spec = *spec;
s->inputs = idxset_new(NULL, NULL);
if (name) {
n = malloc(strlen(name)+9);
sprintf(n, "%s_monitor", name);
}
s->monitor_source = source_new(core, n, spec);
free(n);
s->volume = 0xFF;
s->notify = NULL;
s->get_latency = NULL;
s->userdata = NULL;
r = idxset_put(core->sinks, s, &s->index);
assert(s->index != IDXSET_INVALID && r >= 0);
fprintf(stderr, "sink: created %u \"%s\".\n", s->index, s->name);
return s;
}
void sink_free(struct sink *s) {
struct sink_input *i, *j = NULL;
assert(s);
while ((i = idxset_first(s->inputs, NULL))) {
assert(i != j);
sink_input_kill(i);
j = i;
}
idxset_free(s->inputs, NULL, NULL);
source_free(s->monitor_source);
idxset_remove_by_data(s->core->sinks, s, NULL);
fprintf(stderr, "sink: freed %u \"%s\"\n", s->index, s->name);
free(s->name);
free(s);
}
void sink_notify(struct sink*s) {
assert(s);
if (s->notify)
s->notify(s);
}
static unsigned fill_mix_info(struct sink *s, struct mix_info *info, unsigned maxinfo) {
uint32_t index = IDXSET_INVALID;
struct sink_input *i;
unsigned n = 0;
assert(s && info);
for (i = idxset_first(s->inputs, &index); maxinfo > 0 && i; i = idxset_next(s->inputs, &index)) {
assert(i->peek);
if (i->peek(i, &info->chunk, &info->volume) < 0)
continue;
assert(info->chunk.memblock && info->chunk.memblock->data && info->chunk.length);
info->userdata = i;
info++;
maxinfo--;
n++;
}
return n;
}
static void inputs_drop(struct sink *s, struct mix_info *info, unsigned maxinfo, size_t length) {
assert(s && info);
for (; maxinfo > 0; maxinfo--, info++) {
struct sink_input *i = info->userdata;
assert(i && info->chunk.memblock);
memblock_unref(info->chunk.memblock);
assert(i->drop);
i->drop(i, length);
}
}
int sink_render(struct sink*s, size_t length, struct memchunk *result) {
struct mix_info info[MAX_MIX_CHANNELS];
unsigned n;
size_t l;
assert(s && length && result);
n = fill_mix_info(s, info, MAX_MIX_CHANNELS);
if (n <= 0)
return -1;
if (n == 1) {
struct sink_info *i = info[0].userdata;
assert(i);
*result = info[0].chunk;
memblock_ref(result->memblock);
if (result->length > length)
result->length = length;
l = result->length;
} else {
result->memblock = memblock_new(length);
assert(result->memblock);
result->length = l = mix_chunks(info, n, result->memblock->data, length, &s->sample_spec, s->volume);
result->index = 0;
assert(l);
}
inputs_drop(s, info, n, l);
assert(s->monitor_source);
source_post(s->monitor_source, result);
return 0;
}
int sink_render_into(struct sink*s, struct memchunk *target) {
struct mix_info info[MAX_MIX_CHANNELS];
unsigned n;
size_t l;
assert(s && target && target->length && target->memblock && target->memblock->data);
n = fill_mix_info(s, info, MAX_MIX_CHANNELS);
if (n <= 0)
return -1;
if (n == 1) {
struct sink_info *i = info[0].userdata;
assert(i);
l = target->length;
if (l > info[0].chunk.length)
l = info[0].chunk.length;
memcpy(target->memblock->data+target->index, info[0].chunk.memblock->data + info[0].chunk.index, l);
target->length = l;
} else
target->length = l = mix_chunks(info, n, target->memblock->data+target->index, target->length, &s->sample_spec, s->volume);
assert(l);
inputs_drop(s, info, n, l);
assert(s->monitor_source);
source_post(s->monitor_source, target);
return 0;
}
void sink_render_into_full(struct sink *s, struct memchunk *target) {
struct memchunk chunk;
size_t l, d;
assert(s && target && target->memblock && target->length && target->memblock->data);
l = target->length;
d = 0;
while (l > 0) {
chunk = *target;
chunk.index += d;
chunk.length -= d;
if (sink_render_into(s, &chunk) < 0)
break;
d += chunk.length;
l -= chunk.length;
}
if (l > 0) {
chunk = *target;
chunk.index += d;
chunk.length -= d;
silence_memchunk(&chunk, &s->sample_spec);
}
}
uint32_t sink_get_latency(struct sink *s) {
assert(s);
if (!s->get_latency)
return 0;
return s->get_latency(s);
}
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