mirror of
https://github.com/libretro/RetroArch.git
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289 lines
7.9 KiB
C
289 lines
7.9 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES 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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* SSNES 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 SSNES.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "driver.h"
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#include "general.h"
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#include <stdio.h>
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#include <string.h>
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#include "hqflt/filters.h"
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#include <assert.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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static const audio_driver_t *audio_drivers[] = {
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#ifdef HAVE_ALSA
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&audio_alsa,
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#endif
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#ifdef HAVE_OSS
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&audio_oss,
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#endif
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#ifdef HAVE_RSOUND
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&audio_rsound,
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#endif
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#ifdef HAVE_AL
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&audio_openal,
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#endif
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#ifdef HAVE_ROAR
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&audio_roar,
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#endif
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#ifdef HAVE_JACK
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&audio_jack,
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#endif
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#ifdef HAVE_SDL
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&audio_sdl,
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#endif
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#ifdef HAVE_XAUDIO
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&audio_xa,
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#endif
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#ifdef HAVE_PULSE
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&audio_pulse,
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#endif
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};
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static const video_driver_t *video_drivers[] = {
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#ifdef HAVE_SDL
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&video_gl,
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#endif
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};
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static const input_driver_t *input_drivers[] = {
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#ifdef HAVE_SDL
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&input_sdl,
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#endif
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};
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static void find_audio_driver(void)
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{
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for (int i = 0; i < sizeof(audio_drivers) / sizeof(audio_driver_t*); i++)
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{
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if (strcasecmp(g_settings.audio.driver, audio_drivers[i]->ident) == 0)
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{
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driver.audio = audio_drivers[i];
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return;
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}
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}
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SSNES_ERR("Couldn't find any audio driver named \"%s\"\n", g_settings.audio.driver);
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fprintf(stderr, "Available audio drivers are:\n");
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for (int i = 0; i < sizeof(audio_drivers) / sizeof(audio_driver_t*); i++)
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fprintf(stderr, "\t%s\n", audio_drivers[i]->ident);
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exit(1);
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}
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static void find_video_driver(void)
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{
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for (int i = 0; i < sizeof(video_drivers) / sizeof(video_driver_t*); i++)
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{
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if (strcasecmp(g_settings.video.driver, video_drivers[i]->ident) == 0)
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{
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driver.video = video_drivers[i];
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return;
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}
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}
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SSNES_ERR("Couldn't find any video driver named \"%s\"\n", g_settings.video.driver);
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fprintf(stderr, "Available video drivers are:\n");
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for (int i = 0; i < sizeof(video_drivers) / sizeof(video_driver_t*); i++)
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fprintf(stderr, "\t%s\n", video_drivers[i]->ident);
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exit(1);
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}
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static void find_input_driver(void)
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{
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for (int i = 0; i < sizeof(input_drivers) / sizeof(input_driver_t*); i++)
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{
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if (strcasecmp(g_settings.input.driver, input_drivers[i]->ident) == 0)
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{
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driver.input = input_drivers[i];
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return;
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}
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}
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SSNES_ERR("Couldn't find any input driver named \"%s\"\n", g_settings.input.driver);
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fprintf(stderr, "Available input drivers are:\n");
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for (int i = 0; i < sizeof(input_drivers) / sizeof(input_driver_t*); i++)
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fprintf(stderr, "\t%s\n", video_drivers[i]->ident);
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exit(1);
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}
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void init_drivers(void)
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{
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init_video_input();
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init_audio();
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}
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void uninit_drivers(void)
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{
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uninit_video_input();
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uninit_audio();
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}
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#define AUDIO_CHUNK_SIZE_BLOCKING 64
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#define AUDIO_CHUNK_SIZE_NONBLOCKING 2048 // So we don't get complete line-noise when fast-forwarding audio.
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#define AUDIO_MAX_RATIO 16
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void init_audio(void)
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{
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if (!g_settings.audio.enable)
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{
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g_extern.audio_active = false;
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return;
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}
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find_audio_driver();
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g_extern.audio_data.block_chunk_size = AUDIO_CHUNK_SIZE_BLOCKING;
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g_extern.audio_data.nonblock_chunk_size = AUDIO_CHUNK_SIZE_NONBLOCKING;
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driver.audio_data = driver.audio->init(strlen(g_settings.audio.device) ? g_settings.audio.device : NULL, g_settings.audio.out_rate, g_settings.audio.latency);
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if ( driver.audio_data == NULL )
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g_extern.audio_active = false;
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if (g_extern.audio_active && driver.audio->use_float && driver.audio->use_float(driver.audio_data))
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g_extern.audio_data.use_float = true;
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if (!g_settings.audio.sync && g_extern.audio_active)
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{
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driver.audio->set_nonblock_state(driver.audio_data, true);
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g_extern.audio_data.chunk_size = g_extern.audio_data.nonblock_chunk_size;
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}
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else
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g_extern.audio_data.chunk_size = g_extern.audio_data.block_chunk_size;
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#ifdef HAVE_SRC
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int err;
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g_extern.audio_data.source = src_new(g_settings.audio.src_quality, 2, &err);
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if (!g_extern.audio_data.source)
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g_extern.audio_active = false;
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#else
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g_extern.audio_data.source = hermite_new(2);
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if (!g_extern.audio_data.source)
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g_extern.audio_active = false;
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#endif
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size_t max_bufsamples = g_extern.audio_data.block_chunk_size > g_extern.audio_data.nonblock_chunk_size ?
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g_extern.audio_data.block_chunk_size : g_extern.audio_data.nonblock_chunk_size;
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assert(g_settings.audio.out_rate < g_settings.audio.in_rate * AUDIO_MAX_RATIO);
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assert((g_extern.audio_data.data = malloc(max_bufsamples * sizeof(float))));
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g_extern.audio_data.data_ptr = 0;
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assert((g_extern.audio_data.outsamples = malloc(max_bufsamples * sizeof(float) * AUDIO_MAX_RATIO)));
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assert((g_extern.audio_data.conv_outsamples = malloc(max_bufsamples * sizeof(int16_t) * AUDIO_MAX_RATIO)));
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}
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void uninit_audio(void)
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{
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if (!g_settings.audio.enable)
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{
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g_extern.audio_active = false;
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return;
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}
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if ( driver.audio_data && driver.audio )
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driver.audio->free(driver.audio_data);
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if ( g_extern.audio_data.source )
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{
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#ifdef HAVE_SRC
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src_delete(g_extern.audio_data.source);
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#else
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hermite_free(g_extern.audio_data.source);
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#endif
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}
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free(g_extern.audio_data.data); g_extern.audio_data.data = NULL;
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free(g_extern.audio_data.outsamples); g_extern.audio_data.outsamples = NULL;
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free(g_extern.audio_data.conv_outsamples); g_extern.audio_data.conv_outsamples = NULL;
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}
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void init_video_input(void)
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{
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int scale = 2;
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find_video_driver();
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find_input_driver();
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// We multiply scales with 2 to allow for hi-res games.
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#if HAVE_FILTER
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switch (g_settings.video.filter)
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{
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case FILTER_HQ2X:
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scale = 4;
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break;
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case FILTER_HQ4X:
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case FILTER_NTSC:
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scale = 8;
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break;
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default:
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break;
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}
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#endif
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video_info_t video = {
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.width = (g_settings.video.fullscreen) ? g_settings.video.fullscreen_x : (296 * g_settings.video.xscale),
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.height = (g_settings.video.fullscreen) ? g_settings.video.fullscreen_y : (224 * g_settings.video.yscale),
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.fullscreen = g_settings.video.fullscreen,
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.vsync = g_settings.video.vsync,
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.force_aspect = g_settings.video.force_aspect,
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.smooth = g_settings.video.smooth,
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.input_scale = scale,
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};
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const input_driver_t *tmp = driver.input;
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driver.video_data = driver.video->init(&video, &driver.input, &driver.input_data);
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if ( driver.video_data == NULL )
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{
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SSNES_ERR("Cannot open video driver... Exiting ...\n");
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exit(1);
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}
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// Video driver didn't provide an input driver so we use configured one.
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if (driver.input == NULL)
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{
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driver.input = tmp;
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if (driver.input != NULL)
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{
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driver.input_data = driver.input->init();
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if ( driver.input_data == NULL )
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{
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SSNES_ERR("Cannot init input driver. Exiting ...\n");
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exit(1);
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}
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}
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else
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{
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SSNES_ERR("Cannot find input driver. Exiting ...\n");
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exit(1);
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}
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}
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}
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void uninit_video_input(void)
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{
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if ( driver.video_data && driver.video )
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driver.video->free(driver.video_data);
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if ( driver.input_data != driver.video_data && driver.input )
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driver.input->free(driver.input_data);
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}
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driver_t driver;
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