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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 <string.h>
#include <assert.h>
#include <stdlib.h>
#include "polyplib-simple.h"
#include "polyplib.h"
#include "mainloop.h"
#include "native-common.h"
#include "xmalloc.h"
struct pa_simple {
struct pa_mainloop *mainloop;
struct pa_context *context;
struct pa_stream *stream;
enum pa_stream_direction direction;
int dead, drained;
void *read_data;
size_t read_index, read_length;
};
static void read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata);
static int check_error(struct pa_simple *p, int *perror) {
assert(p);
if (pa_context_is_dead(p->context) || (p->stream && pa_stream_is_dead(p->stream))) {
if (perror)
*perror = pa_context_errno(p->context);
return -1;
}
return 0;
}
static int iterate(struct pa_simple *p, int block, int *perror) {
assert(p && p->context && p->mainloop);
if (check_error(p, perror) < 0)
return -1;
if (!block && !pa_context_is_pending(p->context))
return 0;
do {
if (pa_mainloop_iterate(p->mainloop, 1, NULL) < 0) {
if (perror)
*perror = PA_ERROR_INTERNAL;
return -1;
}
if (check_error(p, perror) < 0)
return -1;
} while (pa_context_is_pending(p->context));
return 0;
}
struct pa_simple* pa_simple_new(
const char *server,
const char *name,
enum pa_stream_direction dir,
const char *dev,
const char *stream_name,
const struct pa_sample_spec *ss,
const struct pa_buffer_attr *attr,
int *perror) {
struct pa_simple *p;
int error = PA_ERROR_INTERNAL;
assert(ss);
p = pa_xmalloc(sizeof(struct pa_simple));
p->context = NULL;
p->stream = NULL;
p->mainloop = pa_mainloop_new();
assert(p->mainloop);
p->dead = 0;
p->direction = dir;
p->read_data = NULL;
p->read_index = p->read_length = 0;
if (!(p->context = pa_context_new(pa_mainloop_get_api(p->mainloop), name)))
goto fail;
if (pa_context_connect(p->context, server, NULL, NULL) < 0) {
error = pa_context_errno(p->context);
goto fail;
}
/* Wait until the context is ready */
while (!pa_context_is_ready(p->context)) {
if (iterate(p, 1, &error) < 0)
goto fail;
}
if (!(p->stream = pa_stream_new(p->context, dir, dev, stream_name, ss, attr, NULL, NULL)))
goto fail;
/* Wait until the stream is ready */
while (!pa_stream_is_ready(p->stream)) {
if (iterate(p, 1, &error) < 0)
goto fail;
}
pa_stream_set_read_callback(p->stream, read_callback, p);
return p;
fail:
if (perror)
*perror = error;
pa_simple_free(p);
return NULL;
}
void pa_simple_free(struct pa_simple *s) {
assert(s);
pa_xfree(s->read_data);
if (s->stream)
pa_stream_free(s->stream);
if (s->context)
pa_context_free(s->context);
if (s->mainloop)
pa_mainloop_free(s->mainloop);
pa_xfree(s);
}
int pa_simple_write(struct pa_simple *p, const void*data, size_t length, int *perror) {
assert(p && data && p->direction == PA_STREAM_PLAYBACK);
while (length > 0) {
size_t l;
while (!(l = pa_stream_writable_size(p->stream)))
if (iterate(p, 1, perror) < 0)
return -1;
if (l > length)
l = length;
pa_stream_write(p->stream, data, l);
data += l;
length -= l;
}
/* Make sure that no data is pending for write */
if (iterate(p, 0, perror) < 0)
return -1;
return 0;
}
static void read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) {
struct pa_simple *p = userdata;
assert(s && data && length && p);
if (p->read_data) {
fprintf(stderr, __FILE__": Buffer overflow, dropping incoming memory blocks.\n");
pa_xfree(p->read_data);
}
p->read_data = pa_xmalloc(p->read_length = length);
memcpy(p->read_data, data, length);
p->read_index = 0;
}
int pa_simple_read(struct pa_simple *p, void*data, size_t length, int *perror) {
assert(p && data && p->direction == PA_STREAM_RECORD);
while (length > 0) {
if (p->read_data) {
size_t l = length;
if (p->read_length <= l)
l = p->read_length;
memcpy(data, p->read_data+p->read_index, l);
data += l;
length -= l;
p->read_index += l;
p->read_length -= l;
if (!p->read_length) {
pa_xfree(p->read_data);
p->read_data = NULL;
p->read_index = 0;
}
if (!length)
return 0;
assert(!p->read_data);
}
if (iterate(p, 1, perror) < 0)
return -1;
}
return 0;
}
static void drain_complete(struct pa_stream *s, void *userdata) {
struct pa_simple *p = userdata;
assert(s && p);
p->drained = 1;
}
int pa_simple_drain(struct pa_simple *p, int *perror) {
assert(p && p->direction == PA_STREAM_PLAYBACK);
p->drained = 0;
pa_stream_drain(p->stream, drain_complete, p);
while (!p->drained) {
if (iterate(p, 1, perror) < 0) {
pa_stream_drain(p->stream, NULL, NULL);
return -1;
}
}
return 0;
}
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