mirror of https://github.com/PCSX2/pcsx2.git
155 lines
3.9 KiB
C++
155 lines
3.9 KiB
C++
/* ZeroSPU2
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* Copyright (C) 2006-2007 zerofrog
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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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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// Modified by arcum42@gmail.com
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#ifndef ZEROSPU2_OSS
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// ALSA
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#include <alsa/asoundlib.h>
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#define ALSA_MEM_DEF
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#include "Linux.h"
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static snd_pcm_t *handle = NULL;
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static snd_pcm_uframes_t buffer_size;
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int AlsaSetupSound()
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{
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snd_pcm_hw_params_t *hwparams;
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snd_pcm_sw_params_t *swparams;
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snd_pcm_status_t *status;
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unsigned int pspeed = SAMPLE_RATE;
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int pchannels = 2;
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snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
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unsigned int buffer_time = SOUNDSIZE;
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unsigned int period_time= buffer_time / 4;
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int err;
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err = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
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if(err < 0) {
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printf("Audio open error: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_nonblock(handle, 0);
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if(err < 0) {
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printf("Can't set blocking moded: %s\n", snd_strerror(err));
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return -1;
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}
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snd_pcm_hw_params_alloca(&hwparams);
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snd_pcm_sw_params_alloca(&swparams);
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err = snd_pcm_hw_params_any(handle, hwparams);
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if (err < 0) {
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printf("Broken configuration for this PCM: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params_set_access(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED);
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if (err < 0) {
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printf("Access type not available: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params_set_format(handle, hwparams, format);
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if (err < 0) {
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printf("Sample format not available: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params_set_channels(handle, hwparams, pchannels);
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if (err < 0) {
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printf("Channels count not available: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &pspeed, 0);
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if (err < 0) {
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printf("Rate not available: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, 0);
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if(err < 0) {
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printf("Buffer time error: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, 0);
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if (err < 0) {
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printf("Period time error: %s\n", snd_strerror(err));
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return -1;
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}
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err = snd_pcm_hw_params(handle, hwparams);
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if (err < 0) {
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printf("Unable to install hw params: %s\n", snd_strerror(err));
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return -1;
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}
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snd_pcm_status_alloca(&status);
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err = snd_pcm_status(handle, status);
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if(err < 0) {
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printf("Unable to get status: %s\n", snd_strerror(err));
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return -1;
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}
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buffer_size=snd_pcm_status_get_avail(status);
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return 0;
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}
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void AlsaRemoveSound()
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{
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if(handle != NULL) {
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snd_pcm_drop(handle);
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snd_pcm_close(handle);
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handle = NULL;
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}
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}
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int AlsaSoundGetBytesBuffered()
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{
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int l;
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// failed to open?
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if(handle == NULL) return SOUNDSIZE;
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l = snd_pcm_avail_update(handle);
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if (l<0)
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return 0;
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else if (l<buffer_size/2) // can we write in at least the half of fragments?
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l=SOUNDSIZE; // -> no? wait
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else
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l=0; // -> else go on
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return l;
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}
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void AlsaSoundFeedVoiceData(unsigned char* pSound,long lBytes)
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{
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if (handle == NULL) return;
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if (snd_pcm_state(handle) == SND_PCM_STATE_XRUN)
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snd_pcm_prepare(handle);
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snd_pcm_writei(handle,pSound, lBytes/4);
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}
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#endif |