mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-25 00:49:47 +00:00
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* RetroArch - A frontend for libretro.
|
|
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
|
|
*
|
|
* RetroArch is free software: you can redistribute it and/or modify it under the terms
|
|
* of the GNU General Public License as published by the Free Software Found-
|
|
* ation, either version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
* PURPOSE. See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with RetroArch.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "../driver.h"
|
|
#include <stdlib.h>
|
|
#include <stdbool.h>
|
|
#include "../general.h"
|
|
|
|
#include <xenon_sound/sound.h>
|
|
|
|
#define SOUND_FREQUENCY 48000
|
|
#define MAX_BUFFER 2048
|
|
|
|
typedef struct
|
|
{
|
|
uint32_t buffer[2048];
|
|
bool nonblock;
|
|
} xenon_audio_t;
|
|
|
|
static void *xenon360_init(const char *device, unsigned rate, unsigned latency)
|
|
{
|
|
static bool inited = false;
|
|
if (!inited)
|
|
{
|
|
xenon_sound_init();
|
|
inited = true;
|
|
}
|
|
|
|
g_settings.audio.out_rate = SOUND_FREQUENCY;
|
|
return calloc(1, sizeof(xenon_audio_t));
|
|
}
|
|
|
|
static inline uint32_t bswap_32(uint32_t val)
|
|
{
|
|
return (val >> 24) | (val << 24) | ((val >> 8) & 0xff00) | ((val << 8) & 0xff0000);
|
|
}
|
|
|
|
static ssize_t xenon360_write(void *data, const void *buf, size_t size)
|
|
{
|
|
xenon_audio_t *xa = data;
|
|
|
|
size_t written = 0;
|
|
|
|
const uint32_t *in_buf = buf;
|
|
for (size_t i = 0; i < (size >> 2); i++)
|
|
xa->buffer[i] = bswap_32(in_buf[i]);
|
|
|
|
if (!xa->nonblock)
|
|
{
|
|
while (xenon_sound_get_unplayed() >= MAX_BUFFER)
|
|
{
|
|
// libxenon doesn't have proper synchronization primitives for this :(
|
|
udelay(50);
|
|
}
|
|
|
|
xenon_sound_submit(xa->buffer, size);
|
|
written = size;
|
|
}
|
|
else
|
|
{
|
|
if (xenon_sound_get_unplayed() < MAX_BUFFER)
|
|
{
|
|
xenon_sound_submit(xa->buffer, size);
|
|
written = size;
|
|
}
|
|
}
|
|
|
|
return written;
|
|
}
|
|
|
|
static bool xenon360_stop(void *data)
|
|
{
|
|
(void)data;
|
|
return true;
|
|
}
|
|
|
|
static void xenon360_set_nonblock_state(void *data, bool state)
|
|
{
|
|
xenon_audio_t *xa = data;
|
|
xa->nonblock = state;
|
|
}
|
|
|
|
static bool xenon360_start(void *data)
|
|
{
|
|
(void)data;
|
|
return true;
|
|
}
|
|
|
|
static void xenon360_free(void *data)
|
|
{
|
|
if (data)
|
|
free(data);
|
|
}
|
|
|
|
const audio_driver_t audio_xenon360 = {
|
|
.init = xenon360_init,
|
|
.write = xenon360_write,
|
|
.stop = xenon360_stop,
|
|
.start = xenon360_start,
|
|
.set_nonblock_state = xenon360_set_nonblock_state,
|
|
.free = xenon360_free,
|
|
.ident = "xenon360"
|
|
};
|
|
|