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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "sink-input.h"
#include "sample-util.h"
#define CONVERT_BUFFER_LENGTH 4096
struct pa_sink_input* pa_sink_input_new(struct pa_sink *s, const char *name, const struct pa_sample_spec *spec) {
struct pa_sink_input *i;
struct pa_resampler *resampler = NULL;
int r;
char st[256];
assert(s && spec);
if (!pa_sample_spec_equal(spec, &s->sample_spec))
if (!(resampler = pa_resampler_new(spec, &s->sample_spec)))
return NULL;
i = malloc(sizeof(struct pa_sink_input));
assert(i);
i->name = name ? strdup(name) : NULL;
i->client = NULL;
i->owner = NULL;
i->sink = s;
i->sample_spec = *spec;
i->peek = NULL;
i->drop = NULL;
i->kill = NULL;
i->get_latency = NULL;
i->userdata = NULL;
i->volume = PA_VOLUME_NORM;
i->resampled_chunk.memblock = NULL;
i->resampled_chunk.index = i->resampled_chunk.length = 0;
i->resampler = resampler;
assert(s->core);
r = pa_idxset_put(s->core->sink_inputs, i, &i->index);
assert(r == 0 && i->index != PA_IDXSET_INVALID);
r = pa_idxset_put(s->inputs, i, NULL);
assert(r == 0);
pa_sample_snprint(st, sizeof(st), spec);
fprintf(stderr, "sink-input: created %u \"%s\" on %u with sample spec \"%s\"\n", i->index, i->name, s->index, st);
return i;
}
void pa_sink_input_free(struct pa_sink_input* i) {
assert(i);
assert(i->sink && i->sink->core);
pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
if (i->resampled_chunk.memblock)
pa_memblock_unref(i->resampled_chunk.memblock);
if (i->resampler)
pa_resampler_free(i->resampler);
free(i->name);
free(i);
}
void pa_sink_input_kill(struct pa_sink_input*i) {
assert(i);
if (i->kill)
i->kill(i);
}
uint32_t pa_sink_input_get_latency(struct pa_sink_input *i) {
uint32_t l = 0;
assert(i);
if (i->get_latency)
l += i->get_latency(i);
assert(i->sink);
l += pa_sink_get_latency(i->sink);
return l;
}
int pa_sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
assert(i && chunk && i->peek && i->drop);
if (!i->resampler)
return i->peek(i, chunk);
if (!i->resampled_chunk.memblock) {
struct pa_memchunk tchunk;
size_t l;
int ret;
if ((ret = i->peek(i, &tchunk)) < 0)
return ret;
l = pa_resampler_request(i->resampler, CONVERT_BUFFER_LENGTH);
if (tchunk.length > l)
tchunk.length = l;
i->drop(i, tchunk.length);
pa_resampler_run(i->resampler, &tchunk, &i->resampled_chunk);
pa_memblock_unref(tchunk.memblock);
}
assert(i->resampled_chunk.memblock && i->resampled_chunk.length);
*chunk = i->resampled_chunk;
pa_memblock_ref(i->resampled_chunk.memblock);
return 0;
}
void pa_sink_input_drop(struct pa_sink_input *i, size_t length) {
assert(i && length);
if (!i->resampler) {
i->drop(i, length);
return;
}
assert(i->resampled_chunk.memblock && i->resampled_chunk.length >= length);
i->resampled_chunk.index += length;
i->resampled_chunk.length -= length;
if (!i->resampled_chunk.length) {
pa_memblock_unref(i->resampled_chunk.memblock);
i->resampled_chunk.memblock = NULL;
i->resampled_chunk.index = i->resampled_chunk.length = 0;
}
}
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