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RetroArch/libretro_version_1.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2016 - Daniel De Matteis
* Copyright (C) 2012-2015 - Michael Lelli
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <retro_inline.h>
#include <boolean.h>
#include "libretro.h"
#include "libretro_version_1.h"
#include "general.h"
#include "msg_hash.h"
#include "rewind.h"
#include "system.h"
#include "gfx/video_driver.h"
#include "audio/audio_driver.h"
#ifdef HAVE_NETPLAY
#include "netplay/netplay.h"
#endif
static struct retro_core_t core;
static unsigned core_poll_type;
static bool core_input_polled;
static int16_t input_state_poll(unsigned port,
unsigned device, unsigned idx, unsigned id)
{
if (core_poll_type == POLL_TYPE_LATE)
{
if (!core_input_polled)
input_poll();
core_input_polled = true;
}
return input_state(port, device, idx, id);
}
/**
* retro_set_default_callbacks:
* @data : pointer to retro_callbacks object
*
* Binds the libretro callbacks to default callback functions.
**/
static bool retro_set_default_callbacks(void *data)
{
struct retro_callbacks *cbs = (struct retro_callbacks*)data;
if (!cbs)
return false;
cbs->frame_cb = video_driver_frame;
cbs->sample_cb = audio_driver_sample;
cbs->sample_batch_cb = audio_driver_sample_batch;
cbs->state_cb = input_state_poll;
cbs->poll_cb = input_poll;
return true;
}
static bool retro_uninit_libretro_cbs(void *data)
{
struct retro_callbacks *cbs = (struct retro_callbacks*)data;
if (!cbs)
return false;
cbs->frame_cb = NULL;
cbs->sample_cb = NULL;
cbs->sample_batch_cb = NULL;
cbs->state_cb = NULL;
cbs->poll_cb = NULL;
return true;
}
static void input_poll_maybe(void)
{
if (core_poll_type == POLL_TYPE_NORMAL)
input_poll();
}
/**
* retro_init_libretro_cbs:
* @data : pointer to retro_callbacks object
*
* Initializes libretro callbacks, and binds the libretro callbacks
* to default callback functions.
**/
static bool retro_init_libretro_cbs(void *data)
{
struct retro_callbacks *cbs = (struct retro_callbacks*)data;
#ifdef HAVE_NETPLAY
global_t *global = global_get_ptr();
#endif
if (!cbs)
return false;
core.retro_set_video_refresh(video_driver_frame);
core.retro_set_audio_sample(audio_driver_sample);
core.retro_set_audio_sample_batch(audio_driver_sample_batch);
core.retro_set_input_state(input_state_poll);
core.retro_set_input_poll(input_poll_maybe);
core_ctl(CORE_CTL_SET_CBS, cbs);
#ifdef HAVE_NETPLAY
if (!netplay_driver_ctl(RARCH_NETPLAY_CTL_IS_DATA_INITED, NULL))
return true;
/* Force normal poll type for netplay. */
core_poll_type = POLL_TYPE_NORMAL;
if (global->netplay.is_spectate)
{
core.retro_set_input_state(
(global->netplay.is_client ?
input_state_spectate_client : input_state_spectate)
);
}
else
{
core.retro_set_video_refresh(video_frame_net);
core.retro_set_audio_sample(audio_sample_net);
core.retro_set_audio_sample_batch(audio_sample_batch_net);
core.retro_set_input_state(input_state_net);
}
#endif
return true;
}
/**
* retro_set_rewind_callbacks:
*
* Sets the audio sampling callbacks based on whether or not
* rewinding is currently activated.
**/
static void retro_set_rewind_callbacks(void)
{
if (state_manager_frame_is_reversed())
{
core.retro_set_audio_sample(audio_driver_sample_rewind);
core.retro_set_audio_sample_batch(audio_driver_sample_batch_rewind);
}
else
{
core.retro_set_audio_sample(audio_driver_sample);
core.retro_set_audio_sample_batch(audio_driver_sample_batch);
}
}
bool core_ctl(enum core_ctl_state state, void *data)
{
static struct retro_callbacks retro_ctx;
switch (state)
{
case CORE_CTL_RETRO_CHEAT_SET:
{
retro_ctx_cheat_info_t *info = (retro_ctx_cheat_info_t*)data;
core.retro_cheat_set(info->index, info->enabled, info->code);
}
break;
case CORE_CTL_RETRO_CHEAT_RESET:
core.retro_cheat_reset();
break;
case CORE_CTL_RETRO_API_VERSION:
{
retro_ctx_api_info_t *api = (retro_ctx_api_info_t*)data;
api->version = core.retro_api_version();
}
break;
case CORE_CTL_SET_POLL_TYPE:
{
unsigned *poll_type = (unsigned*)data;
core_poll_type = *poll_type;
}
break;
case CORE_CTL_RETRO_SYMBOLS_INIT:
{
enum rarch_core_type *core_type = (enum rarch_core_type*)data;
if (!core_type)
return false;
init_libretro_sym(*core_type, &core);
}
break;
case CORE_CTL_RETRO_SET_CONTROLLER_PORT_DEVICE:
{
retro_ctx_controller_info_t *pad = (retro_ctx_controller_info_t*)data;
if (!pad)
return false;
core.retro_set_controller_port_device(pad->port, pad->device);
}
break;
case CORE_CTL_RETRO_GET_MEMORY:
{
retro_ctx_memory_info_t *info = (retro_ctx_memory_info_t*)data;
if (!info)
return false;
info->size = core.retro_get_memory_size(info->id);
info->data = core.retro_get_memory_data(info->id);
}
break;
case CORE_CTL_RETRO_LOAD_GAME:
{
retro_ctx_load_content_info_t *load_info =
(retro_ctx_load_content_info_t*)data;
if (!load_info)
return false;
if (load_info->special)
return core.retro_load_game_special(load_info->special->id, load_info->info, load_info->content->size);
return core.retro_load_game(*load_info->content->elems[0].data ? load_info->info : NULL);
}
case CORE_CTL_RETRO_GET_SYSTEM_INFO:
{
struct retro_system_info *system = (struct retro_system_info*)data;
if (!system)
return false;
core.retro_get_system_info(system);
}
break;
case CORE_CTL_RETRO_UNSERIALIZE:
{
retro_ctx_serialize_info_t *info = (retro_ctx_serialize_info_t*)data;
if (!info)
return false;
if (!core.retro_unserialize(info->data_const, info->size))
return false;
}
break;
case CORE_CTL_RETRO_SERIALIZE:
{
retro_ctx_serialize_info_t *info = (retro_ctx_serialize_info_t*)data;
if (!info)
return false;
if (!core.retro_serialize(info->data, info->size))
return false;
}
break;
case CORE_CTL_RETRO_SERIALIZE_SIZE:
{
retro_ctx_size_info_t *info = (retro_ctx_size_info_t *)data;
if (!info)
return false;
info->size = core.retro_serialize_size();
}
break;
case CORE_CTL_RETRO_CTX_FRAME_CB:
{
retro_ctx_frame_info_t *info = (retro_ctx_frame_info_t*)data;
if (!info || !retro_ctx.frame_cb)
return false;
retro_ctx.frame_cb(
info->data, info->width, info->height, info->pitch);
}
break;
case CORE_CTL_RETRO_CTX_POLL_CB:
if (!retro_ctx.poll_cb)
return false;
retro_ctx.poll_cb();
break;
case CORE_CTL_RETRO_SET_ENVIRONMENT:
{
retro_ctx_environ_info_t *info = (retro_ctx_environ_info_t*)data;
if (!info)
return false;
core.retro_set_environment(info->env);
}
break;
case CORE_CTL_RETRO_GET_SYSTEM_AV_INFO:
{
struct retro_system_av_info *av_info = (struct retro_system_av_info*)data;
if (!av_info)
return false;
core.retro_get_system_av_info(av_info);
}
break;
case CORE_CTL_RETRO_RESET:
core.retro_reset();
break;
case CORE_CTL_RETRO_INIT:
core.retro_init();
break;
case CORE_CTL_RETRO_DEINIT:
core.retro_deinit();
uninit_libretro_sym(&core);
break;
case CORE_CTL_RETRO_UNLOAD_GAME:
video_driver_ctl(RARCH_DISPLAY_CTL_DEINIT_HW_CONTEXT, NULL);
core.retro_unload_game();
break;
case CORE_CTL_RETRO_RUN:
switch (core_poll_type)
{
case POLL_TYPE_EARLY:
input_poll();
break;
case POLL_TYPE_LATE:
core_input_polled = false;
break;
}
core.retro_run();
break;
case CORE_CTL_SET_CBS:
return retro_set_default_callbacks(data);
case CORE_CTL_SET_CBS_REWIND:
retro_set_rewind_callbacks();
break;
case CORE_CTL_INIT:
{
settings_t *settings = config_get_ptr();
core_poll_type = settings->input.poll_type_behavior;
if (!core_ctl(CORE_CTL_VERIFY_API_VERSION, NULL))
return false;
if (!retro_init_libretro_cbs(&retro_ctx))
return false;
core_ctl(CORE_CTL_RETRO_GET_SYSTEM_AV_INFO,
video_viewport_get_system_av_info());
runloop_ctl(RUNLOOP_CTL_SET_FRAME_LIMIT, NULL);
}
break;
case CORE_CTL_DEINIT:
return retro_uninit_libretro_cbs(&retro_ctx);
case CORE_CTL_VERIFY_API_VERSION:
{
unsigned api_version = core.retro_api_version();
RARCH_LOG("Version of libretro API: %u\n", api_version);
RARCH_LOG("Compiled against API: %u\n", RETRO_API_VERSION);
if (api_version != RETRO_API_VERSION)
{
RARCH_WARN("%s\n", msg_hash_to_str(MSG_LIBRETRO_ABI_BREAK));
return false;
}
}
break;
case CORE_CTL_NONE:
default:
break;
}
return true;
}
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