mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-10-29 05:40:23 -04:00
1f0961368f
* add typedefs for public structs and enums and drop the struct/enum prefixs from all uses where it makes sense git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@447 fefdeb5f-60dc-0310-8127-8f9354f1896f
394 lines
9.2 KiB
C
394 lines
9.2 KiB
C
/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <stdlib.h>
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#include "polyplib-simple.h"
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#include "polyplib.h"
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#include "mainloop.h"
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#include "native-common.h"
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#include "xmalloc.h"
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#include "log.h"
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struct pa_simple {
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pa_mainloop *mainloop;
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pa_context *context;
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pa_stream *stream;
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pa_stream_direction direction;
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int dead;
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void *read_data;
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size_t read_index, read_length;
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pa_usec_t latency;
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};
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static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata);
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static int check_error(pa_simple *p, int *rerror) {
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pa_context_state cst;
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pa_stream_state sst;
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assert(p);
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if ((cst = pa_context_get_state(p->context)) == PA_CONTEXT_FAILED)
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goto fail;
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assert(cst != PA_CONTEXT_TERMINATED);
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if (p->stream) {
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if ((sst = pa_stream_get_state(p->stream)) == PA_STREAM_FAILED)
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goto fail;
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assert(sst != PA_STREAM_TERMINATED);
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}
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return 0;
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fail:
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if (rerror)
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*rerror = pa_context_errno(p->context);
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p->dead = 1;
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return -1;
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}
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static int iterate(pa_simple *p, int block, int *rerror) {
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assert(p && p->context && p->mainloop);
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if (check_error(p, rerror) < 0)
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return -1;
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if (!block && !pa_context_is_pending(p->context))
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return 0;
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do {
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if (pa_mainloop_iterate(p->mainloop, 1, NULL) < 0) {
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if (rerror)
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*rerror = PA_ERROR_INTERNAL;
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return -1;
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}
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if (check_error(p, rerror) < 0)
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return -1;
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} while (pa_context_is_pending(p->context));
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while (pa_mainloop_deferred_pending(p->mainloop)) {
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if (pa_mainloop_iterate(p->mainloop, 0, NULL) < 0) {
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if (rerror)
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*rerror = PA_ERROR_INTERNAL;
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return -1;
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}
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if (check_error(p, rerror) < 0)
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return -1;
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}
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return 0;
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}
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pa_simple* pa_simple_new(
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const char *server,
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const char *name,
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pa_stream_direction dir,
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const char *dev,
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const char *stream_name,
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const pa_sample_spec *ss,
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const pa_buffer_attr *attr,
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pa_volume_t volume,
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int *rerror) {
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pa_simple *p;
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int error = PA_ERROR_INTERNAL;
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assert(ss && (dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD));
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p = pa_xmalloc(sizeof(pa_simple));
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p->context = NULL;
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p->stream = NULL;
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p->mainloop = pa_mainloop_new();
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assert(p->mainloop);
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p->dead = 0;
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p->direction = dir;
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p->read_data = NULL;
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p->read_index = p->read_length = 0;
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p->latency = 0;
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if (!(p->context = pa_context_new(pa_mainloop_get_api(p->mainloop), name)))
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goto fail;
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pa_context_connect(p->context, server, 1, NULL);
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/* Wait until the context is ready */
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while (pa_context_get_state(p->context) != PA_CONTEXT_READY) {
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if (iterate(p, 1, &error) < 0)
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goto fail;
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}
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if (!(p->stream = pa_stream_new(p->context, stream_name, ss)))
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goto fail;
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if (dir == PA_STREAM_PLAYBACK)
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pa_stream_connect_playback(p->stream, dev, attr, 0, volume);
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else
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pa_stream_connect_record(p->stream, dev, attr, 0);
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/* Wait until the stream is ready */
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while (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
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if (iterate(p, 1, &error) < 0)
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goto fail;
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}
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pa_stream_set_read_callback(p->stream, read_callback, p);
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return p;
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fail:
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if (rerror)
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*rerror = error;
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pa_simple_free(p);
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return NULL;
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}
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void pa_simple_free(pa_simple *s) {
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assert(s);
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pa_xfree(s->read_data);
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if (s->stream)
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pa_stream_unref(s->stream);
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if (s->context)
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pa_context_unref(s->context);
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if (s->mainloop)
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pa_mainloop_free(s->mainloop);
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pa_xfree(s);
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}
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int pa_simple_write(pa_simple *p, const void*data, size_t length, int *rerror) {
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assert(p && data && p->direction == PA_STREAM_PLAYBACK);
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if (p->dead) {
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if (rerror)
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*rerror = pa_context_errno(p->context);
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return -1;
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}
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while (length > 0) {
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size_t l;
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while (!(l = pa_stream_writable_size(p->stream)))
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if (iterate(p, 1, rerror) < 0)
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return -1;
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if (l > length)
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l = length;
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pa_stream_write(p->stream, data, l, NULL, 0);
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data = (const uint8_t*) data + l;
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length -= l;
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}
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/* Make sure that no data is pending for write */
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if (iterate(p, 0, rerror) < 0)
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return -1;
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return 0;
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}
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static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata) {
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pa_simple *p = userdata;
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assert(s && data && length && p);
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if (p->read_data) {
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pa_log(__FILE__": Buffer overflow, dropping incoming memory blocks.\n");
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pa_xfree(p->read_data);
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}
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p->read_data = pa_xmemdup(data, p->read_length = length);
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p->read_index = 0;
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}
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int pa_simple_read(pa_simple *p, void*data, size_t length, int *rerror) {
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assert(p && data && p->direction == PA_STREAM_RECORD);
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if (p->dead) {
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if (rerror)
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*rerror = pa_context_errno(p->context);
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return -1;
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}
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while (length > 0) {
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if (p->read_data) {
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size_t l = length;
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if (p->read_length <= l)
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l = p->read_length;
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memcpy(data, (uint8_t*) p->read_data+p->read_index, l);
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data = (uint8_t*) data + l;
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length -= l;
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p->read_index += l;
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p->read_length -= l;
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if (!p->read_length) {
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pa_xfree(p->read_data);
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p->read_data = NULL;
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p->read_index = 0;
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}
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if (!length)
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return 0;
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assert(!p->read_data);
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}
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if (iterate(p, 1, rerror) < 0)
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return -1;
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}
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return 0;
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}
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static void drain_or_flush_complete(pa_stream *s, int success, void *userdata) {
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pa_simple *p = userdata;
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assert(s && p);
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if (!success)
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p->dead = 1;
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}
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int pa_simple_drain(pa_simple *p, int *rerror) {
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pa_operation *o;
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assert(p && p->direction == PA_STREAM_PLAYBACK);
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if (p->dead) {
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if (rerror)
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*rerror = pa_context_errno(p->context);
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return -1;
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}
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o = pa_stream_drain(p->stream, drain_or_flush_complete, p);
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while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
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if (iterate(p, 1, rerror) < 0) {
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pa_operation_cancel(o);
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pa_operation_unref(o);
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return -1;
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}
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}
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pa_operation_unref(o);
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if (p->dead && rerror)
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*rerror = pa_context_errno(p->context);
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return p->dead ? -1 : 0;
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}
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static void latency_complete(pa_stream *s, const pa_latency_info *l, void *userdata) {
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pa_simple *p = userdata;
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assert(s && p);
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if (!l)
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p->dead = 1;
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else {
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int negative = 0;
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p->latency = pa_stream_get_latency(s, l, &negative);
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if (negative)
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p->latency = 0;
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}
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}
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pa_usec_t pa_simple_get_playback_latency(pa_simple *p, int *rerror) {
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pa_operation *o;
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assert(p && p->direction == PA_STREAM_PLAYBACK);
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if (p->dead) {
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if (rerror)
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*rerror = pa_context_errno(p->context);
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return (pa_usec_t) -1;
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}
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p->latency = 0;
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o = pa_stream_get_latency_info(p->stream, latency_complete, p);
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while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
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if (iterate(p, 1, rerror) < 0) {
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pa_operation_cancel(o);
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pa_operation_unref(o);
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return -1;
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}
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}
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pa_operation_unref(o);
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if (p->dead && rerror)
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*rerror = pa_context_errno(p->context);
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return p->dead ? (pa_usec_t) -1 : p->latency;
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}
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int pa_simple_flush(pa_simple *p, int *rerror) {
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pa_operation *o;
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assert(p && p->direction == PA_STREAM_PLAYBACK);
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if (p->dead) {
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if (rerror)
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*rerror = pa_context_errno(p->context);
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return -1;
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}
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o = pa_stream_flush(p->stream, drain_or_flush_complete, p);
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while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
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if (iterate(p, 1, rerror) < 0) {
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pa_operation_cancel(o);
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pa_operation_unref(o);
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return -1;
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}
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}
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pa_operation_unref(o);
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if (p->dead && rerror)
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*rerror = pa_context_errno(p->context);
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return p->dead ? -1 : 0;
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}
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