160 lines
3.5 KiB
C++
160 lines
3.5 KiB
C++
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#include "audiostream_rif.h"
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#include "oslib/oslib.h"
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#include "cfg/cfg.h"
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#if 0 && HOST_OS==OS_LINUX && !defined(TARGET_NACL32)
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#if !defined(ANDROID)
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#include <alsa/asoundlib.h>
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#include <pthread.h>
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snd_pcm_t *handle;
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u8 Tempbuffer[8192*4];
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void* AudioThread(void*)
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{
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sched_param sched;
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int policy;
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pthread_getschedparam(pthread_self(),&policy,&sched);
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sched.sched_priority++;//policy=SCHED_RR;
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pthread_setschedparam(pthread_self(),policy,&sched);
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for(;;)
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{
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UpdateBuff(Tempbuffer);
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int rc = snd_pcm_writei(handle, Tempbuffer, settings.aica.BufferSize);
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if (rc == -EPIPE)
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{
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/* EPIPE means underrun */
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fprintf(stderr, "underrun occurred\n");
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snd_pcm_prepare(handle);
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}
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else if (rc < 0)
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{
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fprintf(stderr, "error from writei: %s\n", snd_strerror(rc));
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}
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else if (rc != (int)settings.aica.BufferSize)
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{
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fprintf(stderr, "short write, write %d frames\n", rc);
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}
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}
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}
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cThread aud_thread(AudioThread,0);
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void os_InitAudio()
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{
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if (cfgLoadInt("audio","disable",0))
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return;
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cfgSaveInt("audio","disable",0);
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long loops;
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int size;
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snd_pcm_hw_params_t *params;
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unsigned int val;
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int dir;
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snd_pcm_uframes_t frames;
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/* Open PCM device for playback. */
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int rc = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0);
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if (rc<0)
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rc = snd_pcm_open(&handle, "plughw:0,0,0", SND_PCM_STREAM_PLAYBACK, 0);
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if (rc<0)
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rc = snd_pcm_open(&handle, "plughw:0,0", SND_PCM_STREAM_PLAYBACK, 0);
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if (rc < 0)
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{
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fprintf(stderr, "unable to open PCM device: %s\n", snd_strerror(rc));
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return;
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}
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/* Allocate a hardware parameters object. */
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snd_pcm_hw_params_alloca(¶ms);
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/* Fill it in with default values. */
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rc=snd_pcm_hw_params_any(handle, params);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_any %s\n", snd_strerror(rc));
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return;
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}
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/* Set the desired hardware parameters. */
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/* Interleaved mode */
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rc=snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_set_access %s\n", snd_strerror(rc));
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return;
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}
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/* Signed 16-bit little-endian format */
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rc=snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_set_format %s\n", snd_strerror(rc));
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return;
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}
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/* Two channels (stereo) */
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rc=snd_pcm_hw_params_set_channels(handle, params, 2);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_set_channels %s\n", snd_strerror(rc));
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return;
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}
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/* 44100 bits/second sampling rate (CD quality) */
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val = 44100;
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rc=snd_pcm_hw_params_set_rate_near(handle, params, &val, &dir);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_set_rate_near %s\n", snd_strerror(rc));
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return;
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}
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/* Set period size to settings.aica.BufferSize frames. */
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frames = settings.aica.BufferSize;
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rc=snd_pcm_hw_params_set_period_size_near(handle, params, &frames, &dir);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_set_buffer_size_near %s\n", snd_strerror(rc));
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return;
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}
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frames*=4;
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rc=snd_pcm_hw_params_set_buffer_size_near(handle, params, &frames);
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if (rc < 0)
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{
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fprintf(stderr, "Error:snd_pcm_hw_params_set_buffer_size_near %s\n", snd_strerror(rc));
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return;
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}
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/* Write the parameters to the driver */
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rc = snd_pcm_hw_params(handle, params);
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if (rc < 0)
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{
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fprintf(stderr, "Unable to set hw parameters: %s\n", snd_strerror(rc));
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return;
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}
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aud_thread.Start();
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}
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void os_TermAudio()
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{
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snd_pcm_drain(handle);
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snd_pcm_close(handle);
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}
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#else
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#endif
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#endif |