Max/SameBoy
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Re-do the way the libretro port does audio. Audio is now sent to libretro at 384KHz, which is then resampled to whatever rate the user configured.

Browse Source
This commit is contained in:
Lior Halphon 2018-01-15 22:23:20 +02:00
parent 5c16d0e656
commit 130c7c28c2
1 changed files with 322 additions and 322 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
libretro/libretro.c
View File

@ -6,7 +6,8 @@
#include <signal.h>
#include <stdarg.h>
#define AUDIO_FREQUENCY 44100
#define AUDIO_FREQUENCY 384000
#define FRAME_RATE (0x400000 / 70224.0)
#ifdef _WIN32
#include <direct.h>
@ -18,9 +19,9 @@
#include "libretro.h"
#ifdef _WIN32
char slash = '\\';
char slash = '\\';
#else
char slash = '/';
char slash = '/';
#endif
#define VIDEO_WIDTH 160
@ -39,7 +40,7 @@ static retro_audio_sample_batch_t audio_batch_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
signed short soundbuf[1024*2];
signed short soundbuf[1024 * 2];
char retro_system_directory[4096];
char retro_save_directory[4096];
@ -103,15 +104,24 @@ static void GB_update_keys_status(GB_gameboy_t *gb)
static void audio_callback(void *gb)
{
GB_apu_copy_buffer(gb, (GB_sample_t *) soundbuf, (float)AUDIO_FREQUENCY / 59.72);
audio_batch_cb(soundbuf, (float)AUDIO_FREQUENCY / 59.72);
size_t length = GB_apu_get_current_buffer_length(gb);
while (length > sizeof(soundbuf) / 4)
{
GB_apu_copy_buffer(gb, (GB_sample_t *) soundbuf, 1024);
audio_batch_cb(soundbuf, 1024);
length -= 1024;
}
if (length) {
GB_apu_copy_buffer(gb, (GB_sample_t *) soundbuf, length);
audio_batch_cb(soundbuf, length);
}
}
static void vblank(GB_gameboy_t *gb)
{
GB_update_keys_status(gb);
GB_set_pixels_output(gb, frame_buf);
audio_callback(gb);
}
@ -180,7 +190,7 @@ void retro_get_system_info(struct retro_system_info *info)
void retro_get_system_av_info(struct retro_system_av_info *info)
{
struct retro_game_geometry geom = { VIDEO_WIDTH, VIDEO_HEIGHT,VIDEO_WIDTH, VIDEO_HEIGHT ,160.0 / 144.0 };
struct retro_system_timing timing = { 59.72, 44100.0 };
struct retro_system_timing timing = { FRAME_RATE, AUDIO_FREQUENCY };
info->geometry = geom;
info->timing = timing;
@ -269,20 +279,10 @@ static void check_variables(void)
void retro_run(void)
{
static int frames;
size_t samples;
bool updated = false;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
check_variables();
samples = GB_apu_get_current_buffer_length(&gb);
if (!(frames < (samples / 35112)))
{
GB_run_frame(&gb);
frames ++;
}
else
frames = 0;
video_cb(frame_buf, VIDEO_WIDTH, VIDEO_HEIGHT, VIDEO_WIDTH * sizeof(uint32_t));
}