RetroArch/camera/camera_driver.c

247 lines
6.4 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2015 - Daniel De Matteis
*
* 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 <string.h>
#include <string/string_list.h>
#include "camera_driver.h"
#include "../general.h"
static const camera_driver_t *camera_drivers[] = {
#ifdef HAVE_V4L2
&camera_v4l2,
#endif
#ifdef EMSCRIPTEN
&camera_rwebcam,
#endif
#ifdef ANDROID
&camera_android,
#endif
#if defined(HAVE_AVFOUNDATION)
#if defined(HAVE_COCOA) || defined(HAVE_COCOATOUCH)
&camera_avfoundation,
#endif
#endif
&camera_null,
NULL,
};
/**
* camera_driver_find_handle:
* @idx : index of driver to get handle to.
*
* Returns: handle to camera driver at index. Can be NULL
* if nothing found.
**/
const void *camera_driver_find_handle(int idx)
{
const void *drv = camera_drivers[idx];
if (!drv)
return NULL;
return drv;
}
/**
* camera_driver_find_ident:
* @idx : index of driver to get handle to.
*
* Returns: Human-readable identifier of camera driver at index. Can be NULL
* if nothing found.
**/
const char *camera_driver_find_ident(int idx)
{
const camera_driver_t *drv = camera_drivers[idx];
if (!drv)
return NULL;
return drv->ident;
}
/**
* config_get_camera_driver_options:
*
* Get an enumerated list of all camera driver names,
* separated by '|'.
*
* Returns: string listing of all camera driver names,
* separated by '|'.
**/
const char* config_get_camera_driver_options(void)
{
union string_list_elem_attr attr;
unsigned i;
char *options = NULL;
int options_len = 0;
struct string_list *options_l = string_list_new();
attr.i = 0;
if (!options_l)
return NULL;
for (i = 0; camera_driver_find_handle(i); i++)
{
const char *opt = camera_driver_find_ident(i);
options_len += strlen(opt) + 1;
string_list_append(options_l, opt, attr);
}
options = (char*)calloc(options_len, sizeof(char));
if (!options)
{
string_list_free(options_l);
options_l = NULL;
return NULL;
}
string_list_join_concat(options, options_len, options_l, "|");
string_list_free(options_l);
options_l = NULL;
return options;
}
void find_camera_driver(void)
{
driver_t *driver = driver_get_ptr();
settings_t *settings = config_get_ptr();
int i = find_driver_index("camera_driver", settings->camera.driver);
if (i >= 0)
driver->camera = (const camera_driver_t*)camera_driver_find_handle(i);
else
{
unsigned d;
RARCH_ERR("Couldn't find any camera driver named \"%s\"\n",
settings->camera.driver);
RARCH_LOG_OUTPUT("Available camera drivers are:\n");
for (d = 0; camera_driver_find_handle(d); d++)
RARCH_LOG_OUTPUT("\t%s\n", camera_driver_find_ident(d));
RARCH_WARN("Going to default to first camera driver...\n");
driver->camera = (const camera_driver_t*)camera_driver_find_handle(0);
if (!driver->camera)
retro_fail(1, "find_camera_driver()");
}
}
/**
* driver_camera_start:
*
* Starts camera driver interface.
* Used by RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE.
*
* Returns: true (1) if successful, otherwise false (0).
**/
bool driver_camera_start(void)
{
driver_t *driver = driver_get_ptr();
settings_t *settings = config_get_ptr();
if (driver->camera && driver->camera_data && driver->camera->start)
{
if (settings->camera.allow)
return driver->camera->start(driver->camera_data);
rarch_main_msg_queue_push(
"Camera is explicitly disabled.\n", 1, 180, false);
}
return false;
}
/**
* driver_camera_stop:
*
* Stops camera driver.
* Used by RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE.
*
* Returns: true (1) if successful, otherwise false (0).
**/
void driver_camera_stop(void)
{
driver_t *driver = driver_get_ptr();
if (driver->camera && driver->camera->stop && driver->camera_data)
driver->camera->stop(driver->camera_data);
}
/**
* driver_camera_poll:
*
* Call camera driver's poll function.
* Used by RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE.
*
* Returns: true (1) if successful, otherwise false (0).
**/
void driver_camera_poll(void)
{
driver_t *driver = driver_get_ptr();
rarch_system_info_t *system = rarch_system_info_get_ptr();
if (driver->camera && driver->camera->poll && driver->camera_data)
driver->camera->poll(driver->camera_data,
system->camera_callback.frame_raw_framebuffer,
system->camera_callback.frame_opengl_texture);
}
void init_camera(void)
{
driver_t *driver = driver_get_ptr();
settings_t *settings = config_get_ptr();
rarch_system_info_t *system = rarch_system_info_get_ptr();
/* Resource leaks will follow if camera is initialized twice. */
if (driver->camera_data)
return;
find_camera_driver();
driver->camera_data = driver->camera->init(
*settings->camera.device ? settings->camera.device : NULL,
system->camera_callback.caps,
settings->camera.width ?
settings->camera.width : system->camera_callback.width,
settings->camera.height ?
settings->camera.height : system->camera_callback.height);
if (!driver->camera_data)
{
RARCH_ERR("Failed to initialize camera driver. Will continue without camera.\n");
driver->camera_active = false;
}
if (system->camera_callback.initialized)
system->camera_callback.initialized();
}
void uninit_camera(void)
{
driver_t *driver = driver_get_ptr();
rarch_system_info_t *system = rarch_system_info_get_ptr();
if (driver->camera_data && driver->camera)
{
if (system->camera_callback.deinitialized)
system->camera_callback.deinitialized();
if (driver->camera->free)
driver->camera->free(driver->camera_data);
}
driver->camera_data = NULL;
}