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redream
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lower default audio latency

This commit is contained in:
Anthony Pesch 2017-06-16 22:45:55 -04:00
parent 80f806492f
commit 1469f441e0
1 changed files with 8 additions and 7 deletions
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15
src/host/sdl_host.c
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@ -13,7 +13,7 @@
#include "tracer.h"
DEFINE_OPTION_INT(audio, 1, "Enable audio");
DEFINE_OPTION_INT(latency, 50, "Preferred audio latency in ms");
DEFINE_OPTION_INT(latency, 20, "Preferred audio latency in ms");
DEFINE_OPTION_INT(help, 0, "Show help");
#define AUDIO_FREQ 44100
@ -21,7 +21,7 @@ DEFINE_OPTION_INT(help, 0, "Show help");
#define VIDEO_DEFAULT_HEIGHT 480
#define INPUT_MAX_CONTROLLERS 4
#define AUDIO_FRAMES_TO_MS(frames) (int)(((float)frames / AUDIO_FREQ) * 1000.0)
#define AUDIO_FRAMES_TO_MS(frames) (int)(((float)frames * 1000.0f) / (float)AUDIO_FREQ)
#define MS_TO_AUDIO_FRAMES(ms) (int)(((float)(ms) / 1000.0f) * AUDIO_FREQ)
/*
@ -158,8 +158,9 @@ static int audio_init(struct sdl_host *host) {
/* resume device */
SDL_PauseAudioDevice(host->audio_dev, 0);
LOG_INFO("audio backend created, %d ms latency",
AUDIO_FRAMES_TO_MS(host->audio_spec.samples));
LOG_INFO("audio backend created, %d ms / %d frames latency",
AUDIO_FRAMES_TO_MS(host->audio_spec.samples),
host->audio_spec.samples);
return 1;
}
@ -818,9 +819,9 @@ int main(int argc, char **argv) {
close event is received */
host_poll_events(g_host);
/* only run a frame if the available audio is running low. this syncs
the emulation speed with the host audio clock. note however, if
audio is disabled, the emulator will run completely unthrottled */
/* only step the emulator if the available audio is running low. this
syncs the emulation speed with the host audio clock. note however,
if audio is disabled, the emulator will run unthrottled */
if (!audio_buffer_low(g_host)) {
continue;
}