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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.

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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
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30
libretro/libretro.c
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@ -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>
@ -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));
}