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RetroArch/driver.c

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/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
*
* Some code herein may be based on code found in BSNES.
*
* SSNES 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.
*
* SSNES 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 SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "driver.h"
#include "general.h"
#include "file.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
static const audio_driver_t *audio_drivers[] = {
#ifdef HAVE_ALSA
&audio_alsa,
#endif
#if defined(HAVE_OSS) || defined(HAVE_OSS_BSD)
&audio_oss,
#endif
#ifdef HAVE_RSOUND
&audio_rsound,
#endif
#ifdef HAVE_AL
&audio_openal,
#endif
#ifdef HAVE_ROAR
&audio_roar,
#endif
#ifdef HAVE_JACK
&audio_jack,
#endif
#ifdef HAVE_SDL
&audio_sdl,
#endif
#ifdef HAVE_XAUDIO
&audio_xa,
#endif
#ifdef HAVE_DSOUND
&audio_dsound,
#endif
#ifdef HAVE_PULSE
&audio_pulse,
#endif
#ifdef HAVE_DYLIB
&audio_ext,
#endif
};
static const video_driver_t *video_drivers[] = {
#ifdef HAVE_SDL
&video_gl,
&video_sdl,
#endif
#ifdef HAVE_XVIDEO
&video_xvideo,
#endif
#ifdef HAVE_DYLIB
&video_ext,
#endif
};
static const input_driver_t *input_drivers[] = {
#ifdef HAVE_SDL
&input_sdl,
#endif
#ifdef HAVE_XVIDEO
&input_x,
#endif
};
static void find_audio_driver(void)
{
for (int i = 0; i < sizeof(audio_drivers) / sizeof(audio_driver_t*); i++)
{
if (strcasecmp(g_settings.audio.driver, audio_drivers[i]->ident) == 0)
{
driver.audio = audio_drivers[i];
return;
}
}
SSNES_ERR("Couldn't find any audio driver named \"%s\"\n", g_settings.audio.driver);
fprintf(stderr, "Available audio drivers are:\n");
for (int i = 0; i < sizeof(audio_drivers) / sizeof(audio_driver_t*); i++)
fprintf(stderr, "\t%s\n", audio_drivers[i]->ident);
exit(1);
}
static void find_video_driver(void)
{
for (int i = 0; i < sizeof(video_drivers) / sizeof(video_driver_t*); i++)
{
if (strcasecmp(g_settings.video.driver, video_drivers[i]->ident) == 0)
{
driver.video = video_drivers[i];
return;
}
}
SSNES_ERR("Couldn't find any video driver named \"%s\"\n", g_settings.video.driver);
fprintf(stderr, "Available video drivers are:\n");
for (int i = 0; i < sizeof(video_drivers) / sizeof(video_driver_t*); i++)
fprintf(stderr, "\t%s\n", video_drivers[i]->ident);
exit(1);
}
static void find_input_driver(void)
{
for (int i = 0; i < sizeof(input_drivers) / sizeof(input_driver_t*); i++)
{
if (strcasecmp(g_settings.input.driver, input_drivers[i]->ident) == 0)
{
driver.input = input_drivers[i];
return;
}
}
SSNES_ERR("Couldn't find any input driver named \"%s\"\n", g_settings.input.driver);
fprintf(stderr, "Available input drivers are:\n");
for (int i = 0; i < sizeof(input_drivers) / sizeof(input_driver_t*); i++)
fprintf(stderr, "\t%s\n", input_drivers[i]->ident);
exit(1);
}
void init_drivers(void)
{
init_video_input();
init_audio();
}
void uninit_drivers(void)
{
uninit_video_input();
uninit_audio();
}
static void init_dsp_plugin(void)
{
if (!(*g_settings.audio.dsp_plugin))
return;
g_extern.audio_data.dsp_lib = dylib_load(g_settings.audio.dsp_plugin);
if (!g_extern.audio_data.dsp_lib)
{
SSNES_ERR("Failed to open DSP plugin: \"%s\" ...\n", g_settings.audio.dsp_plugin);
return;
}
const ssnes_dsp_plugin_t* (*SSNES_API_CALLTYPE plugin_init)(void) =
(const ssnes_dsp_plugin_t *(*)(void))dylib_proc(g_extern.audio_data.dsp_lib, "ssnes_dsp_plugin_init");
if (!plugin_init)
{
SSNES_ERR("Failed to find symbol \"ssnes_dsp_plugin_init\" in DSP plugin.\n");
goto error;
}
g_extern.audio_data.dsp_plugin = plugin_init();
if (!g_extern.audio_data.dsp_plugin)
{
SSNES_ERR("Failed to get a valid DSP plugin.\n");
goto error;
}
if (g_extern.audio_data.dsp_plugin->api_version != SSNES_DSP_API_VERSION)
{
SSNES_ERR("DSP plugin API mismatch! SSNES: %d, Plugin: %d\n", SSNES_DSP_API_VERSION, g_extern.audio_data.dsp_plugin->api_version);
goto error;
}
SSNES_LOG("Loaded DSP plugin: \"%s\"\n", g_extern.audio_data.dsp_plugin->ident ? g_extern.audio_data.dsp_plugin->ident : "Unknown");
ssnes_dsp_info_t info = {
.input_rate = g_settings.audio.in_rate,
.output_rate = g_settings.audio.out_rate
};
g_extern.audio_data.dsp_handle = g_extern.audio_data.dsp_plugin->init(&info);
if (!g_extern.audio_data.dsp_handle)
{
SSNES_ERR("Failed to init DSP plugin.\n");
goto error;
}
return;
error:
if (g_extern.audio_data.dsp_lib)
dylib_close(g_extern.audio_data.dsp_lib);
g_extern.audio_data.dsp_plugin = NULL;
g_extern.audio_data.dsp_lib = NULL;
}
static void deinit_dsp_plugin(void)
{
if (g_extern.audio_data.dsp_lib && g_extern.audio_data.dsp_plugin)
{
g_extern.audio_data.dsp_plugin->free(g_extern.audio_data.dsp_handle);
dylib_close(g_extern.audio_data.dsp_lib);
}
}
#define AUDIO_CHUNK_SIZE_BLOCKING 64
#define AUDIO_CHUNK_SIZE_NONBLOCKING 2048 // So we don't get complete line-noise when fast-forwarding audio.
#define AUDIO_MAX_RATIO 16
void init_audio(void)
{
if (!g_settings.audio.enable)
{
g_extern.audio_active = false;
return;
}
find_audio_driver();
g_extern.audio_data.block_chunk_size = AUDIO_CHUNK_SIZE_BLOCKING;
g_extern.audio_data.nonblock_chunk_size = AUDIO_CHUNK_SIZE_NONBLOCKING;
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);
if ( driver.audio_data == NULL )
g_extern.audio_active = false;
if (g_extern.audio_active && driver.audio->use_float && driver.audio->use_float(driver.audio_data))
g_extern.audio_data.use_float = true;
if (!g_settings.audio.sync && g_extern.audio_active)
{
driver.audio->set_nonblock_state(driver.audio_data, true);
g_extern.audio_data.chunk_size = g_extern.audio_data.nonblock_chunk_size;
}
else
g_extern.audio_data.chunk_size = g_extern.audio_data.block_chunk_size;
#ifdef HAVE_SRC
int err;
g_extern.audio_data.source = src_new(g_settings.audio.src_quality, 2, &err);
if (!g_extern.audio_data.source)
g_extern.audio_active = false;
#else
g_extern.audio_data.source = hermite_new(2);
if (!g_extern.audio_data.source)
g_extern.audio_active = false;
#endif
size_t max_bufsamples = g_extern.audio_data.block_chunk_size > g_extern.audio_data.nonblock_chunk_size ?
g_extern.audio_data.block_chunk_size : g_extern.audio_data.nonblock_chunk_size;
assert(g_settings.audio.out_rate < g_settings.audio.in_rate * AUDIO_MAX_RATIO);
assert((g_extern.audio_data.data = malloc(max_bufsamples * sizeof(float))));
g_extern.audio_data.data_ptr = 0;
assert((g_extern.audio_data.outsamples = malloc(max_bufsamples * sizeof(float) * AUDIO_MAX_RATIO)));
assert((g_extern.audio_data.conv_outsamples = malloc(max_bufsamples * sizeof(int16_t) * AUDIO_MAX_RATIO)));
init_dsp_plugin();
}
void uninit_audio(void)
{
if (!g_settings.audio.enable)
{
g_extern.audio_active = false;
return;
}
if ( driver.audio_data && driver.audio )
driver.audio->free(driver.audio_data);
if ( g_extern.audio_data.source )
{
#ifdef HAVE_SRC
src_delete(g_extern.audio_data.source);
#else
hermite_free(g_extern.audio_data.source);
#endif
}
free(g_extern.audio_data.data); g_extern.audio_data.data = NULL;
free(g_extern.audio_data.outsamples); g_extern.audio_data.outsamples = NULL;
free(g_extern.audio_data.conv_outsamples); g_extern.audio_data.conv_outsamples = NULL;
deinit_dsp_plugin();
}
#ifdef HAVE_DYLIB
static void init_filter(void)
{
if (g_extern.filter.active)
return;
if (*g_settings.video.filter_path == '\0')
return;
SSNES_LOG("Loading bSNES filter from \"%s\"\n", g_settings.video.filter_path);
g_extern.filter.lib = dylib_load(g_settings.video.filter_path);
if (!g_extern.filter.lib)
{
SSNES_ERR("Failed to load filter \"%s\"\n", g_settings.video.filter_path);
return;
}
g_extern.filter.psize =
(void (*)(unsigned*, unsigned*))dylib_proc(g_extern.filter.lib, "filter_size");
g_extern.filter.prender =
(void (*)(uint32_t*, uint32_t*,
unsigned, const uint16_t*,
unsigned, unsigned, unsigned))dylib_proc(g_extern.filter.lib, "filter_render");
if (!g_extern.filter.psize || !g_extern.filter.prender)
{
SSNES_ERR("Failed to find functions in filter...\n");
dylib_close(g_extern.filter.lib);
g_extern.filter.lib = NULL;
return;
}
g_extern.filter.active = true;
unsigned width = 512;
unsigned height = 512;
g_extern.filter.psize(&width, &height);
unsigned pow2_x = next_pow2(ceil(width));
unsigned pow2_y = next_pow2(ceil(height));
unsigned maxsize = pow2_x > pow2_y ? pow2_x : pow2_y;
g_extern.filter.scale = maxsize / 256;
g_extern.filter.buffer = malloc(256 * 256 * g_extern.filter.scale * g_extern.filter.scale * sizeof(uint32_t));
g_extern.filter.pitch = 256 * g_extern.filter.scale * sizeof(uint32_t);
assert(g_extern.filter.buffer);
g_extern.filter.colormap = malloc(32768 * sizeof(uint32_t));
assert(g_extern.filter.colormap);
// Set up conversion map from 16-bit XRGB1555 to 32-bit ARGB.
for (int i = 0; i < 32768; i++)
{
unsigned r = (i >> 10) & 31;
unsigned g = (i >> 5) & 31;
unsigned b = (i >> 0) & 31;
r = (r << 3) | (r >> 2);
g = (g << 3) | (g >> 2);
b = (b << 3) | (b >> 2);
g_extern.filter.colormap[i] = (r << 16) | (g << 8) | (b << 0);
}
}
#endif
static void deinit_filter(void)
{
if (g_extern.filter.active)
{
g_extern.filter.active = false;
dylib_close(g_extern.filter.lib);
g_extern.filter.lib = NULL;
free(g_extern.filter.buffer);
free(g_extern.filter.colormap);
}
}
#ifdef HAVE_XML
static void init_shader_dir(void)
{
if (!*g_settings.video.shader_dir)
return;
g_extern.shader_dir.elems = dir_list_new(g_settings.video.shader_dir, ".shader");
g_extern.shader_dir.size = 0;
g_extern.shader_dir.ptr = 0;
if (g_extern.shader_dir.elems)
{
while (g_extern.shader_dir.elems[g_extern.shader_dir.size])
{
SSNES_LOG("Found shader \"%s\"\n", g_extern.shader_dir.elems[g_extern.shader_dir.size]);
g_extern.shader_dir.size++;
}
}
}
static void deinit_shader_dir(void)
{
// It handles NULL, no worries :D
dir_list_free(g_extern.shader_dir.elems);
}
#endif
void init_video_input(void)
{
#ifdef HAVE_DYLIB
init_filter();
#endif
#ifdef HAVE_XML
init_shader_dir();
#endif
// We use at least 512x512 textures to accomodate for hi-res games.
unsigned scale = 2;
find_video_driver();
find_input_driver();
if (g_extern.filter.active)
scale = g_extern.filter.scale;
unsigned width;
unsigned height;
if (g_settings.video.fullscreen)
{
width = g_settings.video.fullscreen_x;
height = g_settings.video.fullscreen_y;
}
else
{
if (g_settings.video.force_aspect)
{
width = 224 * g_settings.video.xscale * g_settings.video.aspect_ratio;
height = 224 * g_settings.video.yscale;
}
else
{
width = 256 * g_settings.video.xscale;
height = 224 * g_settings.video.yscale;
}
}
video_info_t video = {
.width = width,
.height = height,
.fullscreen = g_settings.video.fullscreen,
.vsync = g_settings.video.vsync,
.force_aspect = g_settings.video.force_aspect,
.smooth = g_settings.video.smooth,
.input_scale = scale,
.rgb32 = g_extern.filter.active
};
const input_driver_t *tmp = driver.input;
driver.video_data = driver.video->init(&video, &driver.input, &driver.input_data);
if ( driver.video_data == NULL )
{
SSNES_ERR("Cannot open video driver ... Exiting ...\n");
exit(1);
}
// Video driver didn't provide an input driver so we use configured one.
if (driver.input == NULL)
{
driver.input = tmp;
if (driver.input != NULL)
{
driver.input_data = driver.input->init();
if ( driver.input_data == NULL )
{
SSNES_ERR("Cannot init input driver. Exiting ...\n");
exit(1);
}
}
else
{
SSNES_ERR("Cannot find input driver. Exiting ...\n");
exit(1);
}
}
}
void uninit_video_input(void)
{
if ( driver.video_data && driver.video )
driver.video->free(driver.video_data);
if ( driver.input_data != driver.video_data && driver.input )
driver.input->free(driver.input_data);
deinit_filter();
#ifdef HAVE_XML
deinit_shader_dir();
#endif
}
driver_t driver;
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