diff options
Diffstat (limited to 'sound.c')
| -rw-r--r-- | sound.c | 51 |
1 files changed, 50 insertions, 1 deletions
@@ -19,7 +19,9 @@ #include "common.h" +#ifndef __LIBRETRO__ #include <SDL.h> +#endif u32 global_enable_audio = 1; direct_sound_struct direct_sound_channel[2]; @@ -27,8 +29,10 @@ gbc_sound_struct gbc_sound_channel[4]; u32 sound_frequency = 44100; +#ifndef __LIBRETRO__ SDL_mutex *sound_mutex; static SDL_cond *sound_cv; +#endif #ifdef PSP_BUILD u32 audio_buffer_size_number = 1; @@ -44,7 +48,9 @@ static u32 sound_buffer_base; static u32 sound_last_cpu_ticks; static fixed16_16 gbc_sound_tick_step; +#ifndef __LIBRETRO__ static u32 sound_exit_flag; +#endif // Queue 1, 2, or 4 samples to the top of the DS FIFO, wrap around circularly @@ -447,6 +453,7 @@ void update_gbc_sound(u32 cpu_ticks) gbc_sound_partial_ticks &= 0xFFFF; } +#ifndef __LIBRETRO__ SDL_LockMutex(sound_mutex); if(synchronize_flag) { @@ -487,6 +494,7 @@ void update_gbc_sound(u32 cpu_ticks) } } +#endif if(sound_on == 1) { gs = gbc_sound_channel + 0; @@ -562,9 +570,11 @@ void update_gbc_sound(u32 cpu_ticks) gbc_sound_buffer_index = (gbc_sound_buffer_index + (buffer_ticks * 2)) % BUFFER_SIZE; +#ifndef __LIBRETRO__ SDL_UnlockMutex(sound_mutex); SDL_CondSignal(sound_cv); +#endif } #define sound_copy_normal() \ @@ -595,7 +605,7 @@ void update_gbc_sound(u32 cpu_ticks) } \ -void sound_callback(void *userdata, Uint8 *stream, int length) +void sound_callback(void *userdata, u8 *stream, int length) { u32 sample_length = length / 2; u32 _length; @@ -604,6 +614,7 @@ void sound_callback(void *userdata, Uint8 *stream, int length) s16 *source; s32 current_sample; +#ifndef __LIBRETRO__ SDL_LockMutex(sound_mutex); while(((gbc_sound_buffer_index - sound_buffer_base) % BUFFER_SIZE) < @@ -611,6 +622,7 @@ void sound_callback(void *userdata, Uint8 *stream, int length) { SDL_CondWait(sound_cv, sound_mutex); } +#endif if(global_enable_audio) { @@ -645,9 +657,11 @@ void sound_callback(void *userdata, Uint8 *stream, int length) } } +#ifndef __LIBRETRO__ SDL_CondSignal(sound_cv); SDL_UnlockMutex(sound_mutex); +#endif } // Special thanks to blarrg for the LSFR frequency used in Meridian, as posted @@ -689,7 +703,9 @@ void reset_sound() gbc_sound_struct *gs = gbc_sound_channel; u32 i; +#ifndef __LIBRETRO__ SDL_LockMutex(sound_mutex); +#endif sound_on = 0; sound_buffer_base = 0; @@ -723,13 +739,16 @@ void reset_sound() gs->active_flag = 0; } +#ifndef __LIBRETRO__ SDL_UnlockMutex(sound_mutex); +#endif } void sound_exit() { gbc_sound_buffer_index = (sound_buffer_base + audio_buffer_size) % BUFFER_SIZE; +#ifndef __LIBRETRO__ SDL_PauseAudio(1); sound_exit_flag = 1; SDL_CondSignal(sound_cv); @@ -739,10 +758,12 @@ void sound_exit() sound_mutex = NULL; SDL_DestroyCond(sound_cv); sound_cv = NULL; +#endif } void init_sound(int need_reset) { +#ifndef __LIBRETRO__ SDL_AudioSpec sound_settings; sound_exit_flag = 0; @@ -779,6 +800,8 @@ void init_sound(int need_reset) printf("audio: freq %d, size %d\n", sound_frequency, audio_buffer_size); #endif +#endif + gbc_sound_tick_step = float_to_fp16_16(256.0f / sound_frequency); @@ -788,7 +811,9 @@ void init_sound(int need_reset) if (need_reset) reset_sound(); +#ifndef __LIBRETRO__ SDL_PauseAudio(0); +#endif } #define sound_savestate_builder(type) \ @@ -811,3 +836,27 @@ void sound_##type##_savestate(file_tag_type savestate_file) \ sound_savestate_builder(read); sound_savestate_builder(write_mem); + +#ifdef __LIBRETRO__ +#include "libretro.h" + +static retro_audio_sample_batch_t audio_batch_cb; +void retro_set_audio_sample(retro_audio_sample_t cb) { } +void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } + +void render_audio(void) +{ + static s16 stream_base[1024]; + u32 _length; + s16 *source; + u32 i; + s32 current_sample; + + while (((gbc_sound_buffer_index - sound_buffer_base) % BUFFER_SIZE) > 512) { + sound_copy(sound_buffer_base, 512, normal); + audio_batch_cb(stream_base, 256); + sound_buffer_base += 512; + } +} +#endif + |