mirror of
https://github.com/libretro/libretro-video-processor.git
synced 2024-10-06 22:33:32 +00:00
Initial import of libretro-v4l2 core.
This commit is contained in:
Jared McNeill
parent
9ab0280a2c
commit
1b0f53401f
141
Makefile
Normal file
141
Makefile
Normal file
@ -0,0 +1,141 @@
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STATIC_LINKING := 0
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AR := ar
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ifeq ($(platform),)
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platform = unix
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ifeq ($(shell uname -a),)
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platform = win
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else ifneq ($(findstring MINGW,$(shell uname -a)),)
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platform = win
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else ifneq ($(findstring Darwin,$(shell uname -a)),)
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platform = osx
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else ifneq ($(findstring win,$(shell uname -a)),)
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platform = win
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endif
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endif
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# system platform
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system_platform = unix
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ifeq ($(shell uname -a),)
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EXE_EXT = .exe
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system_platform = win
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else ifneq ($(findstring Darwin,$(shell uname -a)),)
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system_platform = osx
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arch = intel
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ifeq ($(shell uname -p),powerpc)
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arch = ppc
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endif
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else ifneq ($(findstring MINGW,$(shell uname -a)),)
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system_platform = win
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endif
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TARGET_NAME := v4l2
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LIBV4L2 = -lv4l2
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LIBASOUND = -lasound
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ifeq ($(ARCHFLAGS),)
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ifeq ($(archs),ppc)
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ARCHFLAGS = -arch ppc -arch ppc64
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else
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ARCHFLAGS = -arch i386 -arch x86_64
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endif
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endif
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ifeq ($(platform), osx)
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ifndef ($(NOUNIVERSAL))
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CFLAGS += $(ARCHFLAGS)
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LFLAGS += $(ARCHFLAGS)
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endif
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endif
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ifeq ($(STATIC_LINKING), 1)
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EXT := a
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endif
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ifeq ($(platform), unix)
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EXT ?= so
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TARGET := $(TARGET_NAME)_libretro.$(EXT)
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fpic := -fPIC
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SHARED := -shared -Wl,--version-script=link.T -Wl,--no-undefined
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else ifeq ($(platform), linux-portable)
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TARGET := $(TARGET_NAME)_libretro.$(EXT)
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fpic := -fPIC -nostdlib
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SHARED := -shared -Wl,--version-script=link.T
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else ifneq (,$(findstring osx,$(platform)))
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TARGET := $(TARGET_NAME)_libretro.dylib
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fpic := -fPIC
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SHARED := -dynamiclib
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else ifneq (,$(findstring ios,$(platform)))
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TARGET := $(TARGET_NAME)_libretro_ios.dylib
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fpic := -fPIC
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SHARED := -dynamiclib
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ifeq ($(IOSSDK),)
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IOSSDK := $(shell xcodebuild -version -sdk iphoneos Path)
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endif
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DEFINES := -DIOS
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CC = cc -arch armv7 -isysroot $(IOSSDK)
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ifeq ($(platform),ios9)
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CC += -miphoneos-version-min=8.0
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CFLAGS += -miphoneos-version-min=8.0
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else
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CC += -miphoneos-version-min=5.0
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CFLAGS += -miphoneos-version-min=5.0
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endif
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else ifneq (,$(findstring qnx,$(platform)))
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TARGET := $(TARGET_NAME)_libretro_qnx.so
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fpic := -fPIC
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SHARED := -shared -Wl,--version-script=link.T -Wl,--no-undefined
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else ifeq ($(platform), emscripten)
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TARGET := $(TARGET_NAME)_libretro_emscripten.bc
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fpic := -fPIC
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SHARED := -shared -Wl,--version-script=link.T -Wl,--no-undefined
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else ifeq ($(platform), vita)
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TARGET := $(TARGET_NAME)_vita.a
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CC = arm-vita-eabi-gcc
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AR = arm-vita-eabi-ar
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CFLAGS += -Wl,-q -Wall -O3
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STATIC_LINKING = 1
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else
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CC = gcc
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TARGET := $(TARGET_NAME)_libretro.dll
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SHARED := -shared -static-libgcc -static-libstdc++ -s -Wl,--version-script=link.T -Wl,--no-undefined
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endif
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LDFLAGS += $(LIBV4L2) $(LIBASOUND)
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ifeq ($(DEBUG), 1)
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CFLAGS += -O0 -g
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else
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CFLAGS += -O3
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endif
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OBJECTS := v4l2.o
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CFLAGS += -Wall -pedantic $(fpic)
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ifneq (,$(findstring qnx,$(platform)))
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CFLAGS += -Wc,-std=c99
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else
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CFLAGS += -std=gnu99
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endif
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CFLAGS += -I../../libretro-common/include
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all: $(TARGET)
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$(TARGET): $(OBJECTS)
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ifeq ($(STATIC_LINKING), 1)
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$(AR) rcs $@ $(OBJECTS)
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else
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$(CC) $(fpic) $(SHARED) $(INCLUDES) -o $@ $(OBJECTS) $(LDFLAGS)
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endif
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%.o: %.c
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$(CC) $(CFLAGS) $(fpic) -c -o $@ $<
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clean:
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rm -f $(OBJECTS) $(TARGET)
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.PHONY: clean
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2128
libretro.h
Normal file
2128
libretro.h
Normal file
File diff suppressed because it is too large
Load Diff
449
v4l2.c
Normal file
449
v4l2.c
Normal file
@ -0,0 +1,449 @@
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/*-
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* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define LIBRARY_NAME "V4L2"
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#define LIBRARY_VERSION "0.0.1"
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#define VIDEO_PATH "/dev/video0"
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#define VIDEO_FPS 29.97
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#define AUDIO_DEVICE "hw:1,0"
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#define AUDIO_SAMPLE_RATE 48000
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#define AUDIO_BUFSIZE (AUDIO_SAMPLE_RATE * 2 * 2)
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#include "libretro.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <linux/videodev2.h>
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#include <libv4l2.h>
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#include <alsa/asoundlib.h>
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static int video_fd = -1;
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static struct v4l2_format video_format;
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static uint8_t *video_data;
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static size_t video_data_len;
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static uint16_t *conv_data;
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static snd_pcm_t *audio_handle;
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static int16_t audio_data[AUDIO_BUFSIZE];
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static retro_environment_t environment_cb;
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static retro_video_refresh_t video_refresh_cb;
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static retro_audio_sample_t audio_sample_cb;
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static retro_audio_sample_batch_t audio_sample_batch_cb;
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static retro_input_poll_t input_poll_cb;
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static retro_input_state_t input_state_cb;
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RETRO_API void
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retro_set_environment(retro_environment_t cb)
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{
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environment_cb = cb;
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}
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RETRO_API void
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retro_set_video_refresh(retro_video_refresh_t cb)
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{
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video_refresh_cb = cb;
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}
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RETRO_API void
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retro_set_audio_sample(retro_audio_sample_t cb)
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{
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audio_sample_cb = cb;
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}
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RETRO_API void
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retro_set_audio_sample_batch(retro_audio_sample_batch_t cb)
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{
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audio_sample_batch_cb = cb;
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}
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RETRO_API void
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retro_set_input_poll(retro_input_poll_t cb)
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{
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input_poll_cb = cb;
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}
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RETRO_API void
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retro_set_input_state(retro_input_state_t cb)
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{
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input_state_cb = cb;
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}
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RETRO_API void
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retro_init(void)
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{
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struct v4l2_capability caps;
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snd_pcm_hw_params_t *hw_params;
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unsigned int rate;
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int error;
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video_fd = v4l2_open(VIDEO_PATH, 0);
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if (video_fd == -1) {
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printf("Couldn't open " VIDEO_PATH ": %s\n", strerror(errno));
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abort();
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}
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error = v4l2_ioctl(video_fd, VIDIOC_QUERYCAP, &caps);
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if (error != 0) {
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printf("VIDIOC_QUERYCAP failed: %s\n", strerror(errno));
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abort();
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}
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printf("%s:\n", VIDEO_PATH);
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printf(" Driver: %s\n", caps.driver);
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printf(" Card: %s\n", caps.card);
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printf(" Bus Info: %s\n", caps.bus_info);
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printf(" Version: %u.%u.%u\n", (caps.version >> 16) & 0xff, (caps.version >> 8) & 0xff, caps.version & 0xff);
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error = snd_pcm_open(&audio_handle, AUDIO_DEVICE, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
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if (error < 0) {
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printf("Couldn't open " AUDIO_DEVICE ": %s\n", snd_strerror(error));
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audio_handle = NULL;
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}
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if (audio_handle) {
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error = snd_pcm_hw_params_malloc(&hw_params);
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if (error) {
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printf("Couldn't allocate hw param structure: %s\n", snd_strerror(error));
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abort();
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}
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error = snd_pcm_hw_params_any(audio_handle, hw_params);
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if (error) {
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printf("Couldn't initialize hw param structure: %s\n", snd_strerror(error));
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abort();
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}
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error = snd_pcm_hw_params_set_access(audio_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
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if (error) {
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printf("Couldn't set hw param access type: %s\n", snd_strerror(error));
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abort();
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}
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error = snd_pcm_hw_params_set_format(audio_handle, hw_params, SND_PCM_FORMAT_S16_LE);
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if (error) {
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printf("Couldn't set hw param format to SND_PCM_FORMAT_S16_LE: %s\n", snd_strerror(error));
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abort();
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}
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rate = AUDIO_SAMPLE_RATE;
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error = snd_pcm_hw_params_set_rate_near(audio_handle, hw_params, &rate, 0);
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if (error) {
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printf("Couldn't set hw param sample rate to %u: %s\n", rate, snd_strerror(error));
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abort();
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}
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if (rate != AUDIO_SAMPLE_RATE) {
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printf("Hardware doesn't support sample rate %u (returned %u)\n", AUDIO_SAMPLE_RATE, rate);
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abort();
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}
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error = snd_pcm_hw_params_set_channels(audio_handle, hw_params, 2);
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if (error) {
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printf("Couldn't set hw param channels to 2: %s\n", snd_strerror(error));
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abort();
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}
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error = snd_pcm_hw_params(audio_handle, hw_params);
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if (error) {
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printf("Couldn't set hw params: %s\n", snd_strerror(error));
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abort();
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}
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snd_pcm_hw_params_free(hw_params);
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error = snd_pcm_prepare(audio_handle);
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if (error) {
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printf("Couldn't prepare audio interface for use: %s\n", snd_strerror(error));
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abort();
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}
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printf("Using ALSA for audio input\n");
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}
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}
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RETRO_API void
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retro_deinit(void)
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{
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if (audio_handle)
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snd_pcm_close(audio_handle);
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if (video_fd != -1)
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v4l2_close(video_fd);
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}
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RETRO_API unsigned
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retro_api_version(void)
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{
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return RETRO_API_VERSION;
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}
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RETRO_API void
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retro_get_system_info(struct retro_system_info *info)
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{
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info->library_name = LIBRARY_NAME;
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info->library_version = LIBRARY_VERSION;
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info->valid_extensions = "";
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info->need_fullpath = true;
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info->block_extract = true;
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}
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RETRO_API void
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retro_get_system_av_info(struct retro_system_av_info *info)
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{
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info->geometry.base_width = info->geometry.max_width = video_format.fmt.pix.width;
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info->geometry.base_height = info->geometry.max_height = video_format.fmt.pix.height;
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info->timing.fps = VIDEO_FPS;
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info->timing.sample_rate = AUDIO_SAMPLE_RATE;
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||||
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printf("Resolution %ux%u %f fps\n", info->geometry.base_width, info->geometry.base_height, info->timing.fps);
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||||
}
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||||
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||||
RETRO_API void
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||||
retro_set_controller_port_device(unsigned port, unsigned device)
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||||
{
|
||||
}
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||||
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||||
RETRO_API void
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||||
retro_reset(void)
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||||
{
|
||||
}
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||||
|
||||
RETRO_API void
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||||
retro_run(void)
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||||
{
|
||||
ssize_t len;
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||||
uint8_t *src;
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||||
uint16_t *dst;
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||||
int i, frame;
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||||
|
||||
input_poll_cb();
|
||||
|
||||
if (video_data == NULL || video_fd == -1)
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||||
return;
|
||||
|
||||
len = v4l2_read(video_fd, video_data, video_format.fmt.pix.sizeimage);
|
||||
if (len == -1)
|
||||
printf("v4l2_read error: %s\n", strerror(errno));
|
||||
|
||||
src = video_data;
|
||||
dst = conv_data;
|
||||
|
||||
#ifdef PLUGIN_RGB24
|
||||
/* RGB24 to RGB565 */
|
||||
for (i = 0; i < video_format.fmt.pix.width * video_format.fmt.pix.height; i++, src += 3, dst += 1) {
|
||||
*dst = ((src[0] >> 3) << 11) | ((src[1] >> 2) << 5) | ((src[2] >> 3) << 0);
|
||||
}
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||||
#else
|
||||
/* UYVY to RGB565 */
|
||||
const int K1 = (int)(1.402f * (1 << 16));
|
||||
const int K2 = (int)(0.714f * (1 << 16));
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||||
const int K3 = (int)(0.334f * (1 << 16));
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||||
const int K4 = (int)(1.772f * (1 << 16));
|
||||
int R, G, B;
|
||||
for (i = 0; i < video_format.fmt.pix.width * video_format.fmt.pix.height; i += 2, src += 4) {
|
||||
const uint8_t U = src[0];
|
||||
const uint8_t Y1 = src[1];
|
||||
const uint8_t V = src[2];
|
||||
const uint8_t Y2 = src[3];
|
||||
|
||||
const int8_t uf = U - 128;
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||||
const int8_t vf = V - 128;
|
||||
|
||||
R = Y1 + (K1 * vf >> 16);
|
||||
G = Y1 - (K2 * vf >> 16) - (K3 * uf >> 16);
|
||||
B = Y1 + (K4 * uf >> 16);
|
||||
|
||||
if (R < 0) R = 0;
|
||||
else if (R > 255) R = 255;
|
||||
if (G < 0) G = 0;
|
||||
else if (G > 255) G = 255;
|
||||
if (B < 0) B = 0;
|
||||
else if (B > 255) B = 255;
|
||||
|
||||
*dst = ((R >> 3) << 11) | ((G >> 2) << 5) | ((B >> 3) << 0);
|
||||
dst++;
|
||||
|
||||
R = Y2 + (K1 * vf >> 16);
|
||||
G = Y2 - (K2 * vf >> 16) - (K3 * uf >> 16);
|
||||
B = Y2 + (K4 * uf >> 16);
|
||||
|
||||
if (R < 0) R = 0;
|
||||
else if (R > 255) R = 255;
|
||||
if (G < 0) G = 0;
|
||||
else if (G > 255) G = 255;
|
||||
if (B < 0) B = 0;
|
||||
else if (B > 255) B = 255;
|
||||
|
||||
*dst = ((R >> 3) << 11) | ((G >> 2) << 5) | ((B >> 3) << 0);
|
||||
dst++;
|
||||
}
|
||||
#endif
|
||||
|
||||
video_refresh_cb(conv_data, video_format.fmt.pix.width, video_format.fmt.pix.height, video_format.fmt.pix.width * 2);
|
||||
|
||||
if (audio_handle) {
|
||||
const int frames = snd_pcm_readi(audio_handle, audio_data, sizeof(audio_data) / 4);
|
||||
for (frame = 0, i = 0; frame < frames; frame++, i += 2)
|
||||
audio_sample_cb(audio_data[i+0], audio_data[i+1]);
|
||||
}
|
||||
}
|
||||
|
||||
RETRO_API size_t
|
||||
retro_serialize_size(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
RETRO_API bool
|
||||
retro_serialize(void *data, size_t size)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
RETRO_API bool
|
||||
retro_unserialize(const void *data, size_t size)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
RETRO_API void
|
||||
retro_cheat_reset(void)
|
||||
{
|
||||
}
|
||||
|
||||
RETRO_API void
|
||||
retro_cheat_set(unsigned index, bool enabled, const char *code)
|
||||
{
|
||||
}
|
||||
|
||||
RETRO_API bool
|
||||
retro_load_game(const struct retro_game_info *game)
|
||||
{
|
||||
enum retro_pixel_format pixel_format;
|
||||
struct v4l2_standard std, *pstd = NULL;
|
||||
struct v4l2_format fmt;
|
||||
v4l2_std_id std_id;
|
||||
uint32_t index;
|
||||
int error;
|
||||
|
||||
if (video_fd == -1) {
|
||||
printf("Video device not opened\n");
|
||||
return false;
|
||||
}
|
||||
|
||||
free(video_data);
|
||||
|
||||
memset(&fmt, 0, sizeof(fmt));
|
||||
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
||||
|
||||
error = v4l2_ioctl(video_fd, VIDIOC_G_FMT, &fmt);
|
||||
if (error != 0) {
|
||||
printf("VIDIOC_G_FMT failed: %s\n", strerror(errno));
|
||||
return false;
|
||||
}
|
||||
#ifdef PLUGIN_RGB24
|
||||
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
|
||||
error = v4l2_ioctl(video_fd, VIDIOC_S_FMT, &fmt);
|
||||
if (error != 0) {
|
||||
printf("VIDIOC_S_FMT failed: %s\n", strerror(errno));
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
|
||||
error = v4l2_ioctl(video_fd, VIDIOC_G_STD, &std_id);
|
||||
if (error != 0) {
|
||||
printf("VIDIOC_G_STD failed: %s\n", strerror(errno));
|
||||
return false;
|
||||
}
|
||||
for (index = 0; ; index++) {
|
||||
memset(&std, 0, sizeof(std));
|
||||
std.index = index;
|
||||
error = v4l2_ioctl(video_fd, VIDIOC_ENUMSTD, &std);
|
||||
if (error)
|
||||
break;
|
||||
if (std.id == std_id)
|
||||
pstd = &std;
|
||||
printf("VIDIOC_ENUMSTD[%u]: %s%s\n", index, std.name, std.id == std_id ? " [*]" : "");
|
||||
}
|
||||
if (!pstd) {
|
||||
printf("VIDIOC_ENUMSTD did not contain std ID %08x\n", (unsigned)std_id);
|
||||
return false;
|
||||
}
|
||||
|
||||
video_format = fmt;
|
||||
video_data_len = video_format.fmt.pix.sizeimage;
|
||||
video_data = calloc(1, video_data_len);
|
||||
if (video_data == NULL) {
|
||||
printf("Cannot allocate video buffer\n");
|
||||
return false;
|
||||
}
|
||||
printf("Allocated %u byte video buffer\n", video_data_len);
|
||||
|
||||
conv_data = calloc(1, video_format.fmt.pix.width * video_format.fmt.pix.height * 2);
|
||||
if (conv_data == NULL) {
|
||||
printf("Cannot allocate conversion buffer\n");
|
||||
return false;
|
||||
}
|
||||
printf("Allocated %u byte conversion buffer\n", video_data_len);
|
||||
|
||||
pixel_format = RETRO_PIXEL_FORMAT_RGB565;
|
||||
if (!environment_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &pixel_format)) {
|
||||
printf("Cannot set pixel format\n");
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
RETRO_API void
|
||||
retro_unload_game(void)
|
||||
{
|
||||
free(video_data);
|
||||
video_data = NULL;
|
||||
free(conv_data);
|
||||
conv_data = NULL;
|
||||
}
|
||||
|
||||
RETRO_API bool
|
||||
retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
RETRO_API unsigned
|
||||
retro_get_region(void)
|
||||
{
|
||||
return RETRO_REGION_NTSC;
|
||||
}
|
||||
|
||||
RETRO_API void *
|
||||
retro_get_memory_data(unsigned id)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
RETRO_API size_t
|
||||
retro_get_memory_size(unsigned id)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user