mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
964bdfd1e8
clean up mainloop API git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@105 fefdeb5f-60dc-0310-8127-8f9354f1896f
336 lines
9 KiB
C
336 lines
9 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 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 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 <signal.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <polyp/polyplib.h>
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#include <polyp/polyplib-error.h>
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#include <polyp/mainloop.h>
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#include <polyp/mainloop-signal.h>
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static enum { RECORD, PLAYBACK } mode = PLAYBACK;
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static struct pa_context *context = NULL;
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static struct pa_stream *stream = NULL;
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static struct pa_mainloop_api *mainloop_api = NULL;
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static void *buffer = NULL;
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static size_t buffer_length = 0, buffer_index = 0;
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static struct pa_io_event* stdio_event = NULL;
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static void quit(int ret) {
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assert(mainloop_api);
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mainloop_api->quit(mainloop_api, ret);
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}
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static void context_die_callback(struct pa_context *c, void *userdata) {
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assert(c);
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fprintf(stderr, "Connection to server shut down, exiting.\n");
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quit(1);
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}
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static void stream_die_callback(struct pa_stream *s, void *userdata) {
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assert(s);
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fprintf(stderr, "Stream deleted, exiting.\n");
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quit(1);
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}
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static void do_stream_write(size_t length) {
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size_t l;
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assert(length);
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if (!buffer || !buffer_length)
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return;
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l = length;
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if (l > buffer_length)
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l = buffer_length;
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pa_stream_write(stream, buffer+buffer_index, l);
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buffer_length -= l;
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buffer_index += l;
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if (!buffer_length) {
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free(buffer);
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buffer = NULL;
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buffer_index = buffer_length = 0;
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}
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}
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static void stream_write_callback(struct pa_stream *s, size_t length, void *userdata) {
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assert(s && length);
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if (stdio_event)
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mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
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if (!buffer)
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return;
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do_stream_write(length);
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}
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static void stream_read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) {
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assert(s && data && length);
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if (stdio_event)
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mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
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if (buffer) {
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fprintf(stderr, "Buffer overrrun, dropping incoming data\n");
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return;
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}
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buffer = malloc(buffer_length = length);
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assert(buffer);
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memcpy(buffer, data, length);
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buffer_index = 0;
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}
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static void stream_complete_callback(struct pa_stream*s, int success, void *userdata) {
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assert(s);
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if (!success) {
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fprintf(stderr, "Stream creation failed: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
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quit(1);
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return;
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}
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fprintf(stderr, "Stream created.\n");
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}
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static void context_complete_callback(struct pa_context *c, int success, void *userdata) {
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static const struct pa_sample_spec ss = {
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.format = PA_SAMPLE_S16LE,
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.rate = 44100,
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.channels = 2
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};
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assert(c && !stream);
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if (!success) {
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fprintf(stderr, "Connection failed: %s\n", pa_strerror(pa_context_errno(c)));
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goto fail;
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}
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fprintf(stderr, "Connection established.\n");
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if (!(stream = pa_stream_new(c, mode == PLAYBACK ? PA_STREAM_PLAYBACK : PA_STREAM_RECORD, NULL, "pacat", &ss, NULL, stream_complete_callback, NULL))) {
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fprintf(stderr, "pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(c)));
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goto fail;
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}
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pa_stream_set_die_callback(stream, stream_die_callback, NULL);
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pa_stream_set_write_callback(stream, stream_write_callback, NULL);
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pa_stream_set_read_callback(stream, stream_read_callback, NULL);
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return;
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fail:
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quit(1);
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}
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static void context_drain_complete(struct pa_context*c, void *userdata) {
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quit(0);
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}
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static void stream_drain_complete(struct pa_stream*s, void *userdata) {
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fprintf(stderr, "Playback stream drained.\n");
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pa_stream_free(stream);
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stream = NULL;
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if (pa_context_drain(context, context_drain_complete, NULL) < 0)
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quit(0);
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else
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fprintf(stderr, "Draining connection to server.\n");
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}
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static void stdin_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
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size_t l, w = 0;
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ssize_t r;
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assert(a == mainloop_api && e && stdio_event == e);
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if (buffer) {
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mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
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return;
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}
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if (!stream || !pa_stream_is_ready(stream) || !(l = w = pa_stream_writable_size(stream)))
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l = 4096;
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buffer = malloc(l);
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assert(buffer);
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if ((r = read(fd, buffer, l)) <= 0) {
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if (r == 0) {
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fprintf(stderr, "Got EOF.\n");
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pa_stream_drain(stream, stream_drain_complete, NULL);
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} else {
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fprintf(stderr, "read() failed: %s\n", strerror(errno));
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quit(1);
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}
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mainloop_api->io_free(stdio_event);
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stdio_event = NULL;
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return;
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}
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buffer_length = r;
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buffer_index = 0;
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if (w)
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do_stream_write(w);
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}
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static void stdout_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
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ssize_t r;
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assert(a == mainloop_api && e && stdio_event == e);
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if (!buffer) {
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mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
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return;
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}
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assert(buffer_length);
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if ((r = write(fd, buffer+buffer_index, buffer_length)) <= 0) {
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fprintf(stderr, "write() failed: %s\n", strerror(errno));
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quit(1);
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mainloop_api->io_free(stdio_event);
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stdio_event = NULL;
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return;
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}
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buffer_length -= r;
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buffer_index += r;
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if (!buffer_length) {
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free(buffer);
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buffer = NULL;
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buffer_length = buffer_index = 0;
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}
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}
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static void exit_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
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fprintf(stderr, "Got SIGINT, exiting.\n");
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quit(0);
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}
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static void stream_get_latency_callback(struct pa_stream *s, uint32_t latency, void *userdata) {
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assert(s);
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if (latency == (uint32_t) -1) {
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fprintf(stderr, "Failed to get latency: %s\n", strerror(errno));
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quit(1);
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return;
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}
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fprintf(stderr, "Current latency is %u usecs.\n", latency);
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}
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static void sigusr1_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
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if (mode == PLAYBACK) {
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fprintf(stderr, "Got SIGUSR1, requesting latency.\n");
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pa_stream_get_latency(stream, stream_get_latency_callback, NULL);
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}
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}
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int main(int argc, char *argv[]) {
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struct pa_mainloop* m = NULL;
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int ret = 1, r;
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char *bn;
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if (!(bn = strrchr(argv[0], '/')))
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bn = argv[0];
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if (strstr(bn, "rec") || strstr(bn, "mon"))
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mode = RECORD;
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else if (strstr(bn, "cat") || strstr(bn, "play"))
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mode = PLAYBACK;
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fprintf(stderr, "Opening a %s stream.\n", mode == RECORD ? "recording" : "playback");
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if (!(m = pa_mainloop_new())) {
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fprintf(stderr, "pa_mainloop_new() failed.\n");
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goto quit;
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}
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mainloop_api = pa_mainloop_get_api(m);
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r = pa_signal_init(mainloop_api);
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assert(r == 0);
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pa_signal_new(SIGINT, exit_signal_callback, NULL);
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pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
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signal(SIGPIPE, SIG_IGN);
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if (!(stdio_event = mainloop_api->io_new(mainloop_api,
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mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
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mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
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mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
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fprintf(stderr, "source_io() failed.\n");
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goto quit;
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}
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if (!(context = pa_context_new(mainloop_api, argv[0]))) {
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fprintf(stderr, "pa_context_new() failed.\n");
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goto quit;
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}
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if (pa_context_connect(context, NULL, context_complete_callback, NULL) < 0) {
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fprintf(stderr, "pa_context_connext() failed.\n");
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goto quit;
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}
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pa_context_set_die_callback(context, context_die_callback, NULL);
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if (pa_mainloop_run(m, &ret) < 0) {
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fprintf(stderr, "pa_mainloop_run() failed.\n");
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goto quit;
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}
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quit:
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if (stream)
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pa_stream_free(stream);
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if (context)
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pa_context_free(context);
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if (m) {
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pa_signal_done();
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pa_mainloop_free(m);
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}
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if (buffer)
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free(buffer);
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return ret;
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}
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