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https://github.com/libretro/RetroArch.git
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e7f182811a
* Split up audio code into new file audio/audio_driver.c * Fix build issues #1 * Small cleanup * Fix typo
163 lines
3.3 KiB
C
163 lines
3.3 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2014-2017 - Francisco Javier Trujillo Mata
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <malloc.h>
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#include <string.h>
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#include <kernel.h>
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#include <audsrv.h>
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#include "../audio_driver.h"
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#define AUDIO_BUFFER 128 * 1024
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#define AUDIO_CHANNELS 2
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#define AUDIO_BITS 16
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typedef struct ps2_audio
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{
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/* TODO/FIXME - nonblock is not implemented */
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bool nonblock;
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bool running;
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} ps2_audio_t;
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static void audioConfigure(ps2_audio_t *ps2, unsigned rate)
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{
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struct audsrv_fmt_t format;
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format.bits = AUDIO_BITS;
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format.freq = rate;
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format.channels = AUDIO_CHANNELS;
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audsrv_set_format(&format);
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audsrv_set_volume(MAX_VOLUME);
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}
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static void *ps2_audio_init(const char *device,
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unsigned rate, unsigned latency,
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unsigned block_frames,
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unsigned *new_rate)
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{
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ps2_audio_t *ps2 = (ps2_audio_t*)calloc(1, sizeof(ps2_audio_t));
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if (!ps2)
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return NULL;
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audioConfigure(ps2, rate);
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return ps2;
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}
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static void ps2_audio_free(void *data)
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{
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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if (!ps2)
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return;
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ps2->running = false;
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audsrv_stop_audio();
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free(ps2);
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}
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static ssize_t ps2_audio_write(void *data, const void *buf, size_t size)
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{
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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if (!ps2->running)
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return -1;
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return audsrv_play_audio(buf, size);
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}
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static bool ps2_audio_alive(void *data)
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{
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bool alive = false;
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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if (ps2)
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alive = ps2->running;
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return alive;
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}
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static bool ps2_audio_stop(void *data)
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{
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bool stop = true;
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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if (ps2)
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{
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audsrv_stop_audio();
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ps2->running = false;
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}
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return stop;
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}
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static bool ps2_audio_start(void *data, bool is_shutdown)
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{
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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bool start = true;
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if (ps2)
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ps2->running = true;
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return start;
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}
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static void ps2_audio_set_nonblock_state(void *data, bool toggle)
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{
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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if (ps2)
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ps2->nonblock = toggle;
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}
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static bool ps2_audio_use_float(void *data)
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{
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return false;
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}
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static size_t ps2_audio_write_avail(void *data)
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{
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ps2_audio_t* ps2 = (ps2_audio_t*)data;
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if (ps2 && ps2->running)
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return AUDIO_BUFFER;
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return 0;
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}
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static size_t ps2_audio_buffer_size(void *data)
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{
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return AUDIO_BUFFER;
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}
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audio_driver_t audio_ps2 = {
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ps2_audio_init,
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ps2_audio_write,
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ps2_audio_stop,
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ps2_audio_start,
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ps2_audio_alive,
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ps2_audio_set_nonblock_state,
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ps2_audio_free,
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ps2_audio_use_float,
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"ps2",
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NULL,
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NULL,
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ps2_audio_write_avail,
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ps2_audio_buffer_size
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};
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