First version for Raspberry Pi
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Chips-fr
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426
src/sd-sdl/sound_sdl_new.cpp
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426
src/sd-sdl/sound_sdl_new.cpp
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/*
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* Minimalistic sound.c implementation
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* (c) notaz, 2007
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <semaphore.h>
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#include <pthread.h>
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#include <errno.h>
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#include "sysconfig.h"
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#include "sysdeps.h"
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#include "config.h"
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#include "uae.h"
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#include "options.h"
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#include "memory.h"
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#include "debug.h"
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#include "audio.h"
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#include "gensound.h"
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#include "sounddep/sound.h"
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#include "custom.h"
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#include <SDL.h>
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#ifdef ANDROIDSDL
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#include <android/log.h>
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#endif
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extern unsigned long next_sample_evtime;
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int produce_sound=0;
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int changed_produce_sound=0;
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#define SOUND_USE_SEMAPHORES
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#define SOUND_BUFFERS_COUNT 4
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static uae_u16 sndbuffer[SOUND_BUFFERS_COUNT][(SNDBUFFER_LEN+32)*DEFAULT_SOUND_CHANNELS];
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unsigned n_callback_sndbuff, n_render_sndbuff;
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uae_u16 *sndbufpt = sndbuffer[0];
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uae_u16 *render_sndbuff = sndbuffer[0];
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uae_u16 *finish_sndbuff = sndbuffer[0] + SNDBUFFER_LEN*2;
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#ifdef NO_SOUND
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void finish_sound_buffer (void) { }
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int setup_sound (void) { sound_available = 0; return 0; }
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void close_sound (void) { }
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void pandora_stop_sound (void) { }
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int init_sound (void) { return 0; }
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void pause_sound (void) { }
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void resume_sound (void) { }
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void update_sound (int) { }
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void reset_sound (void) { }
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void uae4all_init_sound(void) { }
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void uae4all_play_click(void) { }
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void uae4all_pause_music(void) { }
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void uae4all_resume_music(void) { }
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void restart_sound_buffer(void) { }
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#else
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static int have_sound = 0;
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void sound_default_evtime(void)
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{
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int pal = beamcon0 & 0x20;
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#if !( defined(PANDORA) || defined(ANDROIDSDL) )
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switch(m68k_speed)
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{
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case 6:
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scaled_sample_evtime=(unsigned)(MAXHPOS_PAL*MAXVPOS_PAL*VBLANK_HZ_PAL*CYCLE_UNIT/1.86)/sound_rate;
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break;
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case 5:
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case 4: // ~4/3 234
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if (pal)
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scaled_sample_evtime=(MAXHPOS_PAL*244*VBLANK_HZ_PAL*CYCLE_UNIT)/sound_rate; // ???
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else
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scaled_sample_evtime=(MAXHPOS_NTSC*255*VBLANK_HZ_NTSC*CYCLE_UNIT)/sound_rate;
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break;
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case 3:
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case 2: // ~8/7 273
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if (pal)
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scaled_sample_evtime=(MAXHPOS_PAL*270*VBLANK_HZ_PAL*CYCLE_UNIT)/sound_rate;
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else
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scaled_sample_evtime=(MAXHPOS_NTSC*255*VBLANK_HZ_NTSC*CYCLE_UNIT)/sound_rate;
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break;
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case 1:
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default: // MAXVPOS_PAL?
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#endif
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if (pal)
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scaled_sample_evtime=(MAXHPOS_PAL*313*VBLANK_HZ_PAL*CYCLE_UNIT)/currprefs.sound_freq;
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else
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scaled_sample_evtime=(MAXHPOS_NTSC*MAXVPOS_NTSC*VBLANK_HZ_NTSC*CYCLE_UNIT)/currprefs.sound_freq + 1;
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#if !( defined(PANDORA) || defined(ANDROIDSDL) )
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break;
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}
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#endif
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}
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static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;
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static int sound_thread_active = 0, sound_thread_exit = 0;
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static sem_t sound_sem, callback_sem;
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#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
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static int cnt = 0;
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static void sound_thread_mixer(void *ud, Uint8 *stream, int len)
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{
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if (sound_thread_exit) return;
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int sem_val;
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sound_thread_active = 1;
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/*
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// Sound is choppy, arrgh
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sem_getvalue(&sound_sem, &sem_val);
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while (sem_val > 1)
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{
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//printf("skip %i (%i)\n", cnt, sem_val);
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sem_wait(&sound_sem);
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cnt++;
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sem_getvalue(&sound_sem, &sem_val);
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}
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*/
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#ifdef SOUND_USE_SEMAPHORES
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sem_wait(&sound_sem);
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sem_post(&callback_sem);
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#endif
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cnt++;
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//__android_log_print(ANDROID_LOG_INFO, "UAE4ALL2","Sound callback cnt %d buf %d\n", cnt, cnt%SOUND_BUFFERS_COUNT);
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if(currprefs.sound_stereo)
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memcpy(stream, sndbuffer[cnt%SOUND_BUFFERS_COUNT], MIN(SNDBUFFER_LEN*2, len));
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else
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memcpy(stream, sndbuffer[cnt%SOUND_BUFFERS_COUNT], MIN(SNDBUFFER_LEN, len));
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}
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static int pandora_start_sound(int rate, int bits, int stereo)
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{
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int frag = 0, buffers, ret;
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unsigned int bsize;
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static int audioOpened = 0;
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if (!sound_thread_active)
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{
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// init sem, start sound thread
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printf("starting sound thread..\n");
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ret = sem_init(&sound_sem, 0, 0);
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sem_init(&callback_sem, 0, 0);
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if (ret != 0) printf("sem_init() failed: %i, errno=%i\n", ret, errno);
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}
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// if no settings change, we don't need to do anything
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if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo)
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return 0;
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if( audioOpened ) {
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// __android_log_print(ANDROID_LOG_INFO, "UAE4ALL2", "UAE tries to open SDL sound device 2 times, ignoring that.");
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// SDL_CloseAudio();
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return 0;
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}
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SDL_AudioSpec as;
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memset(&as, 0, sizeof(as));
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// __android_log_print(ANDROID_LOG_INFO, "UAE4ALL2", "Opening audio: rate %d bits %d stereo %d", rate, bits, stereo);
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as.freq = rate;
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as.format = (bits == 8 ? AUDIO_S8 : AUDIO_S16);
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as.channels = (stereo ? 2 : 1);
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if(currprefs.sound_stereo)
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as.samples = SNDBUFFER_LEN*2 / as.channels / 2;
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else
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as.samples = SNDBUFFER_LEN / as.channels / 2;
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as.callback = sound_thread_mixer;
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SDL_OpenAudio(&as, NULL);
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audioOpened = 1;
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s_oldrate = rate;
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s_oldbits = bits;
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s_oldstereo = stereo;
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SDL_PauseAudio (0);
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return 0;
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}
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// this is meant to be called only once on exit
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void pandora_stop_sound(void)
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{
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if (sound_thread_exit)
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printf("don't call pandora_stop_sound more than once!\n");
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if (sound_thread_active)
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{
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printf("stopping sound thread..\n");
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sound_thread_exit = 1;
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sem_post(&sound_sem);
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//usleep(100*1000);
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}
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SDL_PauseAudio (1);
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}
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static int wrcnt = 0;
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void finish_sound_buffer (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : finish_sound_buffer");
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#endif
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//printf("finish %i\n", wrcnt);
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#if 0
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if(currprefs.sound_stereo)
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write(sounddev, sndbuffer[0], SNDBUFFER_LEN*2);
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else
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write(sounddev, sndbuffer[0], SNDBUFFER_LEN);
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sndbufpt = render_sndbuff = sndbuffer[0];
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#else
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#ifdef SOUND_USE_SEMAPHORES
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sem_post(&sound_sem);
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sem_wait(&callback_sem);
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#endif
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wrcnt++;
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sndbufpt = render_sndbuff = sndbuffer[wrcnt%SOUND_BUFFERS_COUNT];
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//__android_log_print(ANDROID_LOG_INFO, "UAE4ALL2","Sound buffer write cnt %d buf %d\n", wrcnt, wrcnt%SOUND_BUFFERS_COUNT);
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#endif
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if(currprefs.sound_stereo)
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finish_sndbuff = sndbufpt + SNDBUFFER_LEN;
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else
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finish_sndbuff = sndbufpt + SNDBUFFER_LEN/2;
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! finish_sound_buffer");
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#endif
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}
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void restart_sound_buffer(void)
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{
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sndbufpt = render_sndbuff = sndbuffer[wrcnt&3];
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if(currprefs.sound_stereo)
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finish_sndbuff = sndbufpt + SNDBUFFER_LEN;
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else
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finish_sndbuff = sndbufpt + SNDBUFFER_LEN/2;
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}
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/* Try to determine whether sound is available. This is only for GUI purposes. */
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int setup_sound (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : setup_sound");
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#endif
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// Android does not like opening sound device several times
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if (pandora_start_sound(currprefs.sound_freq, 16, currprefs.sound_stereo) != 0)
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return 0;
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sound_available = 1;
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! setup_sound");
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#endif
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return 1;
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}
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void update_sound (int freq)
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{
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sound_default_evtime();
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}
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static int open_sound (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : open_sound");
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#endif
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// Android does not like opening sound device several times
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if (pandora_start_sound(currprefs.sound_freq, 16, currprefs.sound_stereo) != 0)
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return 0;
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init_sound_table16 ();
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have_sound = 1;
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sound_available = 1;
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if(currprefs.sound_stereo)
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sample_handler = sample16s_handler;
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else
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sample_handler = sample16_handler;
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! open_sound");
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#endif
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return 1;
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}
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void close_sound (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : close_sound");
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#endif
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if (!have_sound)
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return;
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// testing shows that reopenning sound device is not a good idea on gp2x (causes random sound driver crashes)
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// we will close it on real exit instead
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#ifdef RASPBERRY
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pandora_stop_sound();
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#endif
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have_sound = 0;
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! close_sound");
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#endif
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}
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int init_sound (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : init_sound");
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#endif
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have_sound=open_sound();
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! init_sound");
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#endif
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return have_sound;
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}
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void pause_sound (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : pause_sound");
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#endif
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SDL_PauseAudio (1);
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/* nothing to do */
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! pause_sound");
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#endif
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}
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void resume_sound (void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : resume_sound");
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#endif
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SDL_PauseAudio (0);
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/* nothing to do */
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! resume_sound");
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#endif
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}
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void uae4all_init_sound(void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : uae4all_init_sound");
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#endif
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! uae4all_init_sound");
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#endif
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}
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void uae4all_pause_music(void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : pause_music");
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#endif
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! pause_music");
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#endif
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}
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void uae4all_resume_music(void)
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{
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#ifdef DEBUG_SOUND
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dbg("sound.c : resume_music");
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#endif
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#ifdef DEBUG_SOUND
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dbg(" sound.c : ! resume_music");
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#endif
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}
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void uae4all_play_click(void)
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{
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}
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void reset_sound (void)
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{
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if (!have_sound)
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return;
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memset(sndbuffer, 0, 2 * 4 * (SNDBUFFER_LEN+32)*DEFAULT_SOUND_CHANNELS);
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}
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#endif
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