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https://github.com/projectM-visualizer/projectm.git
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aee3074028
git-svn-id: https://projectm.svn.sourceforge.net/svnroot/projectm/trunk@710 6778bc44-b910-0410-a7a0-be141de4315d
471 lines
13 KiB
C++
471 lines
13 KiB
C++
#include <QtDebug>
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#include "libprojectM/projectM.hpp"
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#include "QPulseAudioThread.hpp"
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#include <QtDebug>
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#include "libprojectM/projectM.hpp"
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/* $Id: pacat.c 1426 2007-02-13 15:35:19Z ossman $ */
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio 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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PulseAudio 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 PulseAudio; 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 <getopt.h>
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#include <fcntl.h>
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extern "C" {
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#include <pulse/pulseaudio.h>
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}
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#define TIME_EVENT_USEC 50000
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#if PA_API_VERSION < 9
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#error Invalid PulseAudio API version
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#endif
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#define BUFSIZE 1024
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static pa_context *context = NULL;
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static pa_stream *stream = NULL;
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static pa_mainloop_api *mainloop_api = NULL;
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static pa_time_event *time_event = NULL;
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static float *buffer = NULL;
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static size_t buffer_length = 0, buffer_index = 0;
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static pa_threaded_mainloop* mainloop = NULL;
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static pa_io_event* stdio_event = NULL;
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static char *server = NULL;
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static char *stream_name = NULL, *client_name = NULL, *device = NULL;
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static int verbose = 0;
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static pa_volume_t volume = PA_VOLUME_NORM;
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static pa_channel_map channel_map;
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static int channel_map_set = 0;
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static pa_sample_spec sample_spec ;
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QPulseAudioThread::QPulseAudioThread(int _argc, char **_argv, projectM * _projectM, QObject * parent) : QThread(parent), argc(_argc), argv(_argv), m_projectM(_projectM) {
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}
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QPulseAudioThread::~QPulseAudioThread()
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{
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}
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void QPulseAudioThread::cleanup() {
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pa_threaded_mainloop_stop(mainloop);
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if (stream)
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pa_stream_unref(stream);
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if (context)
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pa_context_unref(context);
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if (stdio_event) {
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assert(mainloop_api);
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mainloop_api->io_free(stdio_event);
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}
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if (time_event) {
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assert(mainloop_api);
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mainloop_api->time_free(time_event);
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}
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if (mainloop_api)
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mainloop_api->quit(mainloop_api, 0);
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if (mainloop) {
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pa_signal_done();
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pa_threaded_mainloop_free(mainloop);
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}
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if (buffer)
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pa_xfree(buffer);
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if (server)
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pa_xfree(server);
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if (device)
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pa_xfree(device);
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if (client_name)
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pa_xfree(client_name);
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if (stream_name)
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pa_xfree(stream_name);
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return ;
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}
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/* A shortcut for terminating the application */
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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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/* This is called whenever new data may is available */
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static void stream_read_callback(pa_stream *s, size_t length, void *userdata) {
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const void *data;
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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_OUTPUT);
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if (pa_stream_peek(s, &data, &length) < 0) {
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fprintf(stderr, "pa_stream_peek() failed: %s\n", pa_strerror(pa_context_errno(context)));
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quit(1);
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return;
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}
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assert(data && length);
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if (buffer) {
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fprintf(stderr, "Buffer overrun, dropping incoming data\n");
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if (pa_stream_drop(s) < 0) {
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fprintf(stderr, "pa_stream_drop() failed: %s\n", pa_strerror(pa_context_errno(context)));
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quit(1);
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}
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return;
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}
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buffer = (float*)pa_xmalloc(buffer_length = length);
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memcpy(buffer, data, length);
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buffer_index = 0;
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pa_stream_drop(s);
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}
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/* This routine is called whenever the stream state changes */
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static void stream_state_callback(pa_stream *s, void *userdata) {
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assert(s);
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switch (pa_stream_get_state(s)) {
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case PA_STREAM_CREATING:
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case PA_STREAM_TERMINATED:
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break;
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case PA_STREAM_READY:
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if (verbose) {
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const pa_buffer_attr *a;
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fprintf(stderr, "Stream successfully created.\n");
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if (!(a = pa_stream_get_buffer_attr(s)))
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fprintf(stderr, "pa_stream_get_buffer_attr() failed: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
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else {
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fprintf(stderr, "Buffer metrics: maxlength=%u, fragsize=%u\n", a->maxlength, a->fragsize);
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}
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}
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break;
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case PA_STREAM_FAILED:
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default:
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fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
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quit(1);
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}
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}
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/* This is called whenever the context status changes */
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static void context_state_callback(pa_context *c, void *userdata) {
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assert(c);
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switch (pa_context_get_state(c)) {
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case PA_CONTEXT_CONNECTING:
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case PA_CONTEXT_AUTHORIZING:
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case PA_CONTEXT_SETTING_NAME:
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break;
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case PA_CONTEXT_READY: {
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int r;
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assert(c && !stream);
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if (verbose)
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fprintf(stderr, "Connection established.\n");
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if (!(stream = pa_stream_new(c, stream_name, &sample_spec, channel_map_set ? &channel_map : 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_state_callback(stream, stream_state_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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pa_stream_flags_t flags = (pa_stream_flags_t )0;
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if (((r = pa_stream_connect_record(stream, device, NULL, flags))) < 0) {
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fprintf(stderr, "pa_stream_connect_record() failed: %s\n", pa_strerror(pa_context_errno(c)));
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goto fail;
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}
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break;
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}
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case PA_CONTEXT_TERMINATED:
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quit(0);
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break;
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case PA_CONTEXT_FAILED:
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default:
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fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
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goto fail;
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}
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return;
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fail:
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quit(1);
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}
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/* Connection draining complete */
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static void context_drain_complete(pa_context*c, void *userdata) {
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pa_context_disconnect(c);
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}
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/* Stream draining complete */
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static void stream_drain_complete(pa_stream*s, int success, void *userdata) {
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pa_operation *o;
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if (!success) {
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fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
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quit(1);
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}
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if (verbose)
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fprintf(stderr, "Playback stream drained.\n");
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pa_stream_disconnect(stream);
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pa_stream_unref(stream);
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stream = NULL;
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if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
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pa_context_disconnect(context);
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else {
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if (verbose)
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fprintf(stderr, "Draining connection to server.\n");
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}
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}
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/* Some data may be written to STDOUT */
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static void stdout_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t 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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} else {
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projectM * prjm = static_cast<projectM *>(userdata);
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prjm->pcm->addPCMfloat(buffer+buffer_index, buffer_length/(sizeof(float)));
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assert(buffer_length);
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pa_xfree(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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/* UNIX signal to quit recieved */
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static void exit_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
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if (verbose)
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fprintf(stderr, "Got signal, exiting.\n");
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quit(0);
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}
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/* Show the current latency */
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static void stream_update_timing_callback(pa_stream *s, int success, void *userdata) {
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pa_usec_t latency, usec;
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int negative = 0;
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assert(s);
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if (!success ||
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pa_stream_get_time(s, &usec) < 0 ||
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pa_stream_get_latency(s, &latency, &negative) < 0) {
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fprintf(stderr, "Failed to get latency: %s\n", pa_strerror(pa_context_errno(context)));
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quit(1);
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return;
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}
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fprintf(stderr, "Time: %0.3f sec; Latency: %0.0f usec. \r",
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(float) usec / 1000000,
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(float) latency * (negative?-1:1));
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}
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/* Someone requested that the latency is shown */
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static void sigusr1_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
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if (!stream)
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return;
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pa_operation_unref(pa_stream_update_timing_info(stream, stream_update_timing_callback, NULL));
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}
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static void time_event_callback(pa_mainloop_api*m, pa_time_event *e, const struct timeval *tv, void *userdata) {
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struct timeval next;
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if (stream && pa_stream_get_state(stream) == PA_STREAM_READY) {
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pa_operation *o;
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if (!(o = pa_stream_update_timing_info(stream, stream_update_timing_callback, NULL)))
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fprintf(stderr, "pa_stream_update_timing_info() failed: %s\n", pa_strerror(pa_context_errno(context)));
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else
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pa_operation_unref(o);
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}
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pa_gettimeofday(&next);
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pa_timeval_add(&next, TIME_EVENT_USEC);
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m->time_restart(e, &next);
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}
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void QPulseAudioThread::run() {
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int ret = 1, r, c;
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char *bn = "QPulseAudioThread";
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sample_spec.format = PA_SAMPLE_FLOAT32LE;
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sample_spec.rate = 44100;
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sample_spec.channels = 2;
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pa_context_flags_t flags = (pa_context_flags_t)0;
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verbose = 1;
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if (!pa_sample_spec_valid(&sample_spec)) {
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fprintf(stderr, "Invalid sample specification\n");
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goto quit;
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}
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if (channel_map_set && channel_map.channels != sample_spec.channels) {
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fprintf(stderr, "Channel map doesn't match sample specification\n");
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goto quit;
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}
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if (verbose) {
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char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
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pa_sample_spec_snprint(t, sizeof(t), &sample_spec);
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fprintf(stderr, "Opening a %s stream with sample specification '%s'.\n", "recording" , t);
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}
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if (!client_name)
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client_name = pa_xstrdup(bn);
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//printf("client name:%s", client_name);
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if (!stream_name)
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stream_name = pa_xstrdup(client_name);
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/* Set up a new main loop */
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if (!(mainloop = pa_threaded_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_threaded_mainloop_get_api(mainloop);
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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(SIGTERM, exit_signal_callback, NULL);
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#ifdef SIGUSR1
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pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
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#endif
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#ifdef SIGPIPE
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signal(SIGPIPE, SIG_IGN);
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#endif
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if (!(stdio_event = mainloop_api->io_new(mainloop_api,
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STDOUT_FILENO,
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PA_IO_EVENT_OUTPUT,
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stdout_callback, m_projectM))) {
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fprintf(stderr, "io_new() failed.\n");
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goto quit;
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}
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/* Create a new connection context */
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if (!(context = pa_context_new(mainloop_api, client_name))) {
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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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pa_context_set_state_callback(context, context_state_callback, NULL);
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/* Connect the context */
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pa_context_connect(context, server, flags, NULL);
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if (verbose) {
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struct timeval tv;
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pa_gettimeofday(&tv);
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pa_timeval_add(&tv, TIME_EVENT_USEC);
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if (!(time_event = mainloop_api->time_new(mainloop_api, &tv, time_event_callback, NULL))) {
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fprintf(stderr, "time_new() failed.\n");
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goto quit;
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}
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}
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/* Run the main loop */
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if (pa_threaded_mainloop_start(mainloop) < 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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return ;
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}
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