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294 lines
7.0 KiB
294 lines
7.0 KiB
/*
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*
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* $Id: k3bartsoutputplugin.cpp 369057 2004-12-07 14:05:11Z trueg $
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* Copyright (C) 2004 Sebastian Trueg <trueg@k3b.org>
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*
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* This file is part of the K3b project.
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* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
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*
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* This program 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 by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* See the file "COPYING" for the exact licensing terms.
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*/
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#include <config.h>
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#include "k3balsaoutputplugin.h"
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#include <k3bpluginfactory.h>
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#include <k3bcore.h>
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#include <kdebug.h>
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#include <kcombobox.h>
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#include <klocale.h>
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#include <kconfig.h>
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#include <kdialog.h>
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#include <tqlayout.h>
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#include <tqlabel.h>
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#include <alsa/asoundlib.h>
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#include <alsa/pcm.h>
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K_EXPORT_COMPONENT_FACTORY( libk3balsaoutputplugin, K3bPluginFactory<K3bAlsaOutputPlugin>( "k3balsaoutputplugin" ) )
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class K3bAlsaOutputPlugin::Private
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{
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public:
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Private()
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: pcm_playback(0),
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error(false) {
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}
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snd_pcm_t *pcm_playback;
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bool error;
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TQString lastErrorMessage;
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bool swap;
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unsigned int sampleRate;
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};
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K3bAlsaOutputPlugin::K3bAlsaOutputPlugin( TQObject* parent, const char* name )
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: K3bAudioOutputPlugin( parent, name )
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{
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d = new Private;
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}
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K3bAlsaOutputPlugin::~K3bAlsaOutputPlugin()
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{
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cleanup();
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delete d;
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}
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int K3bAlsaOutputPlugin::write( char* data, int len )
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{
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if( d->error )
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return -1;
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char* buffer = data;
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if( d->swap ) {
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buffer = new char[len];
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for( int i = 0; i < len-1; i+=2 ) {
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buffer[i] = data[i+1];
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buffer[i+1] = data[i];
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}
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}
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int written = 0;
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while( written < len ) {
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snd_pcm_sframes_t frames = snd_pcm_writei( d->pcm_playback,
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buffer+written,
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snd_pcm_bytes_to_frames( d->pcm_playback, len-written ) );
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if( frames < 0 ) {
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if( !recoverFromError( frames ) ) {
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d->error = true;
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return -1;
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}
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}
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else {
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written += snd_pcm_frames_to_bytes( d->pcm_playback, frames );
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}
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}
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return written;
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}
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bool K3bAlsaOutputPlugin::recoverFromError( int err )
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{
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if( err == -EPIPE ) {
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err = snd_pcm_prepare( d->pcm_playback );
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if( err < 0 ) {
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d->lastErrorMessage = i18n("Internal Alsa problem: %1").tqarg(snd_strerror(err));
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return false;
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}
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}
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else if( err == -ESTRPIPE ) {
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while( ( err = snd_pcm_resume( d->pcm_playback ) ) == -EAGAIN )
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sleep( 1 );
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if (err < 0) {
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// unable to wake up pcm device, restart it
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err = snd_pcm_prepare( d->pcm_playback );
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if( err < 0 ) {
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d->lastErrorMessage = i18n("Internal Alsa problem: %1").tqarg(snd_strerror(err));
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return false;
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}
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}
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return true;
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}
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return false;
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}
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void K3bAlsaOutputPlugin::cleanup()
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{
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if( d->pcm_playback ) {
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snd_pcm_drain( d->pcm_playback );
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snd_pcm_close( d->pcm_playback );
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}
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d->pcm_playback = 0;
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d->error = false;
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}
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bool K3bAlsaOutputPlugin::init()
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{
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cleanup();
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KConfigGroup c( k3bcore->config(), "Alsa Output Plugin" );
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TQString alsaDevice = c.readEntry( "output device", "default" );
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int err = snd_pcm_open( &d->pcm_playback, alsaDevice.local8Bit(), SND_PCM_STREAM_PLAYBACK, 0 );
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if( err < 0 ) {
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d->lastErrorMessage = i18n("Could not open alsa audio device '%1' (%2).").tqarg(alsaDevice).tqarg(snd_strerror(err));
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d->error = true;
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return false;
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}
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if( !setupHwParams() ) {
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d->error = true;
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return false;
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}
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d->error = false;
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return true;
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}
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bool K3bAlsaOutputPlugin::setupHwParams()
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{
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snd_pcm_hw_params_t* hw_params;
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int err = 0;
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if( ( err = snd_pcm_hw_params_malloc( &hw_params ) ) < 0 ) {
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d->lastErrorMessage = i18n("Could not allocate hardware parameter structure (%1)").tqarg(snd_strerror(err));
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d->error = true;
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return false;
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}
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if( (err = snd_pcm_hw_params_any( d->pcm_playback, hw_params )) < 0) {
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d->lastErrorMessage = i18n("Could not initialize hardware parameter structure (%1).").tqarg(snd_strerror(err));
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snd_pcm_hw_params_free( hw_params );
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d->error = true;
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return false;
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}
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if( (err = snd_pcm_hw_params_set_access( d->pcm_playback, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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d->lastErrorMessage = i18n("Could not set access type (%1).").tqarg(snd_strerror(err));
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snd_pcm_hw_params_free( hw_params );
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d->error = true;
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return false;
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}
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if( (err = snd_pcm_hw_params_set_format( d->pcm_playback, hw_params, SND_PCM_FORMAT_S16_BE)) < 0) {
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if( (err = snd_pcm_hw_params_set_format( d->pcm_playback, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) {
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d->lastErrorMessage = i18n("Could not set sample format (%1).").tqarg(snd_strerror(err));
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snd_pcm_hw_params_free( hw_params );
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d->error = true;
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return false;
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}
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else
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d->swap = true;
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}
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else
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d->swap = false;
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d->sampleRate = 44100;
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if( (err = snd_pcm_hw_params_set_rate_near( d->pcm_playback, hw_params, &d->sampleRate, 0)) < 0) {
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d->lastErrorMessage = i18n("Could not set sample rate (%1).").tqarg(snd_strerror(err));
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snd_pcm_hw_params_free( hw_params );
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d->error = true;
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return false;
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}
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kdDebug() << "(K3bAlsaOutputPlugin) samplerate set to " << d->sampleRate << endl;
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if( (err = snd_pcm_hw_params_set_channels( d->pcm_playback, hw_params, 2)) < 0) {
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d->lastErrorMessage = i18n("Could not set channel count (%1).").tqarg(snd_strerror(err));
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snd_pcm_hw_params_free( hw_params );
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d->error = true;
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return false;
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}
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if( (err = snd_pcm_hw_params( d->pcm_playback, hw_params )) < 0) {
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d->lastErrorMessage = i18n("Could not set parameters (%1).").tqarg(snd_strerror(err));
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snd_pcm_hw_params_free( hw_params );
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d->error = true;
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return false;
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}
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snd_pcm_hw_params_free(hw_params);
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return true;
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}
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TQString K3bAlsaOutputPlugin::lastErrorMessage() const
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{
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return d->lastErrorMessage;
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}
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K3bPluginConfigWidget* K3bAlsaOutputPlugin::createConfigWidget( TQWidget* parent,
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const char* name ) const
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{
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return new K3bAlsaOutputPluginConfigWidget( parent, name );
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}
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K3bAlsaOutputPluginConfigWidget::K3bAlsaOutputPluginConfigWidget( TQWidget* parent, const char* name )
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: K3bPluginConfigWidget( parent, name )
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{
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TQHBoxLayout* l = new TQHBoxLayout( this );
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l->setSpacing( KDialog::spacingHint() );
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l->setAutoAdd( true );
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(void)new TQLabel( i18n("Alsa device:"), this );
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m_comboDevice = new KComboBox( this );
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m_comboDevice->setEditable( true );
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// enable completion
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m_comboDevice->completionObject();
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// FIXME: initialize the list of devices
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m_comboDevice->insertItem( "default" );
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}
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K3bAlsaOutputPluginConfigWidget::~K3bAlsaOutputPluginConfigWidget()
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{
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}
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void K3bAlsaOutputPluginConfigWidget::loadConfig()
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{
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KConfigGroup c( k3bcore->config(), "Alsa Output Plugin" );
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m_comboDevice->setCurrentText( c.readEntry( "output device", "default" ) );
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}
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void K3bAlsaOutputPluginConfigWidget::saveConfig()
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{
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KConfigGroup c( k3bcore->config(), "Alsa Output Plugin" );
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c.writeEntry( "output device", m_comboDevice->currentText() );
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}
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#include "k3balsaoutputplugin.moc"
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