RetroArch/audio/roar.c
2014-10-16 07:27:42 +02:00

137 lines
3.1 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - 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 <roaraudio.h>
#include <errno.h>
#include <stdint.h>
#include "../boolean.h"
#include "general.h"
typedef struct
{
roar_vs_t *vss;
bool nonblocking;
} roar_t;
static void *ra_init(const char *device, unsigned rate, unsigned latency)
{
(void)latency;
int err;
roar_t *roar = (roar_t*)calloc(1, sizeof(roar_t));
if (roar == NULL)
return NULL;
roar_vs_t *vss;
if ((vss = roar_vs_new_simple(device, "RetroArch", rate, 2, ROAR_CODEC_PCM_S, 16, ROAR_DIR_PLAY, &err)) == NULL)
{
RARCH_ERR("RoarAudio: \"%s\"\n", roar_vs_strerr(err));
free(roar);
return NULL;
}
roar_vs_role(vss, ROAR_ROLE_GAME, NULL);
roar->vss = vss;
return roar;
}
static ssize_t ra_write(void *data, const void *buf, size_t size)
{
roar_t *roar = (roar_t*)data;
ssize_t rc;
if (size == 0)
return 0;
int err;
size_t written = 0;
while (written < size)
{
size_t write_amt = size - written;
if ((rc = roar_vs_write(roar->vss, (const char*)buf + written, write_amt, &err)) < (ssize_t)write_amt)
{
if (roar->nonblocking)
return rc;
else if (rc < 0)
return -1;
}
written += rc;
}
return size;
}
static bool ra_stop(void *data)
{
roar_t *roar = (roar_t*)data;
if (roar)
roar->is_paused = true;
return true;
}
static bool ra_alive(void *data)
{
roar_t *roar = (roar_t*)data;
if (roar)
return !roar->is_paused;
return false;
}
static void ra_set_nonblock_state(void *data, bool state)
{
roar_t *roar = (roar_t*)data;
if (roar_vs_blocking(roar->vss, (state) ? ROAR_VS_FALSE : ROAR_VS_TRUE, NULL) < 0)
fprintf(stderr, "RetroArch [ERROR]: Can't set nonblocking. Will not be able to fast-forward.\n");
roar->nonblocking = state;
}
static bool ra_start(void *data)
{
roar_t *roar = (roar_t*)data;
if (roar)
roar->is_paused = false;
return true;
}
static void ra_free(void *data)
{
roar_t *roar = (roar_t*)data;
roar_vs_close(roar->vss, ROAR_VS_TRUE, NULL);
free(data);
}
static bool ra_use_float(void *data)
{
alsa_t *alsa = (alsa_t*)data;
return false;
}
audio_driver_t audio_roar = {
ra_init,
ra_write,
ra_stop,
ra_start,
ra_alive,
ra_set_nonblock_state,
ra_free,
ra_use_float,
"roar",
NULL,
NULL
};