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main-sdl2.cpp
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main-sdl2.cpp
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#include <string>
#include <array>
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstdint>
#include <cassert>
#include <boost/lockfree/spsc_queue.hpp>
#include <SDL.h>
#include "junknes.h"
#include "ines.hpp"
#include "util.hpp"
using namespace std;
namespace{
template<typename T>
bool allequal(const T& x, const T& y) { return x == y; }
template<typename T, typename... Args>
bool allequal(const T& x, const T& y, Args... tail) { return x == y && allequal(y, tail...); }
struct InputMap{
int scancode;
int port;
unsigned int button;
};
constexpr InputMap INPUT_MAP[] = {
{ SDL_SCANCODE_D, 0, JUNKNES_JOY_R },
{ SDL_SCANCODE_A, 0, JUNKNES_JOY_L },
{ SDL_SCANCODE_S, 0, JUNKNES_JOY_D },
{ SDL_SCANCODE_W, 0, JUNKNES_JOY_U },
{ SDL_SCANCODE_E, 0, JUNKNES_JOY_T },
{ SDL_SCANCODE_Q, 0, JUNKNES_JOY_S },
{ SDL_SCANCODE_X, 0, JUNKNES_JOY_B },
{ SDL_SCANCODE_Z, 0, JUNKNES_JOY_A },
};
constexpr int AUDIO_FREQ = 44100;
constexpr SDL_AudioFormat AUDIO_FORMAT = AUDIO_S16SYS;
constexpr int AUDIO_CHANNELS = 1;
constexpr int AUDIO_SAMPLES = 4096; // これ実際にはバッファサイズだと思う
constexpr uint32_t PALETTE_RGBA[0x40] = {
0x747474FF, 0x24188CFF, 0x0000A8FF, 0x44009CFF,
0x8C0074FF, 0xA80010FF, 0xA40000FF, 0x7C0800FF,
0x402C00FF, 0x004400FF, 0x005000FF, 0x003C14FF,
0x183C5CFF, 0x000000FF, 0x000000FF, 0x000000FF,
0xBCBCBCFF, 0x0070ECFF, 0x2038ECFF, 0x8000F0FF,
0xBC00BCFF, 0xE40058FF, 0xD82800FF, 0xC84C0CFF,
0x887000FF, 0x009400FF, 0x00A800FF, 0x009038FF,
0x008088FF, 0x000000FF, 0x000000FF, 0x000000FF,
0xFCFCFCFF, 0x3CBCFCFF, 0x5C94FCFF, 0xCC88FCFF,
0xF478FCFF, 0xFC74B4FF, 0xFC7460FF, 0xFC9838FF,
0xF0BC3CFF, 0x80D010FF, 0x4CDC48FF, 0x58F898FF,
0x00E8D8FF, 0x787878FF, 0x000000FF, 0x000000FF,
0xFCFCFCFF, 0xA8E4FCFF, 0xC4D4FCFF, 0xD4C8FCFF,
0xFCC4FCFF, 0xFCC4D8FF, 0xFCBCB0FF, 0xFCD8A8FF,
0xFCE4A0FF, 0xE0FCA0FF, 0xA8F0BCFF, 0xB0FCCCFF,
0x9CFCF0FF, 0xC4C4C4FF, 0x000000FF, 0x000000FF
};
void warn(const char* msg)
{
fputs(msg, stderr);
putc('\n', stderr);
}
[[noreturn]] void error(const char* msg)
{
warn(msg);
exit(1);
}
void print_window(SDL_Window* win)
{
int w, h;
SDL_GetWindowSize(win, &w, &h);
uint32_t fmt = SDL_GetWindowPixelFormat(win);
printf("size : %d x %d\n", w, h);
printf("format : 0x%08X\n", fmt);
printf(" PixelType : %u\n", SDL_PIXELTYPE(fmt));
printf(" PixelOrder : %u\n", SDL_PIXELORDER(fmt));
printf(" PixelLayout : %u\n", SDL_PIXELLAYOUT(fmt));
printf(" BitsPerPixel : %u\n", SDL_BITSPERPIXEL(fmt));
printf(" BytesPerPixel : %u\n", SDL_BYTESPERPIXEL(fmt));
printf(" Indexed : %u\n", SDL_ISPIXELFORMAT_INDEXED(fmt));
printf(" Alpha : %u\n", SDL_ISPIXELFORMAT_ALPHA(fmt));
printf(" Fourcc : %u\n", SDL_ISPIXELFORMAT_FOURCC(fmt));
}
void print_renderer(SDL_Renderer* ren)
{
SDL_RendererInfo info;
if(SDL_GetRendererInfo(ren, &info) != 0)
error("SDL_GetRendererinfo() failed");
printf("name : %s\n", info.name);
printf("flags : 0x%08X\n", info.flags);
printf("texture formats : %u\n", info.num_texture_formats);
for(unsigned int i = 0; i < info.num_texture_formats; ++i)
printf(" 0x%08X\n", info.texture_formats[i]);
printf("max texture width : %d\n", info.max_texture_width);
printf("max texture height : %d\n", info.max_texture_height);
}
void print_texture(SDL_Texture* tex)
{
int w, h;
uint32_t fmt;
int access;
if(SDL_QueryTexture(tex, &fmt, &access, &w, &h) != 0)
error("SDL_QueryTexture() failed");
printf("size : %d x %d\n", w, h);
printf("format : 0x%08X\n", fmt);
printf(" PixelType : %u\n", SDL_PIXELTYPE(fmt));
printf(" PixelOrder : %u\n", SDL_PIXELORDER(fmt));
printf(" PixelLayout : %u\n", SDL_PIXELLAYOUT(fmt));
printf(" BitsPerPixel : %u\n", SDL_BITSPERPIXEL(fmt));
printf(" BytesPerPixel : %u\n", SDL_BYTESPERPIXEL(fmt));
printf(" Indexed : %u\n", SDL_ISPIXELFORMAT_INDEXED(fmt));
printf(" Alpha : %u\n", SDL_ISPIXELFORMAT_ALPHA(fmt));
printf(" Fourcc : %u\n", SDL_ISPIXELFORMAT_FOURCC(fmt));
printf("access : 0x%08X\n", access);
}
void print_audio_spec(const SDL_AudioSpec& spec, bool obtained)
{
printf("freq : %d\n", spec.freq);
printf("format : %d\n", spec.format);
printf("channels : %u\n", spec.channels);
printf("samples : %u\n", spec.samples);
if(obtained){
printf("silence : %u\n", spec.silence);
printf("size : %u\n", spec.size);
}
}
void input(unsigned int inputs[2])
{
SDL_PumpEvents();
const uint8_t* keys = SDL_GetKeyboardState(nullptr);
for(const auto& m : INPUT_MAP){
if(keys[m.scancode])
inputs[m.port] |= m.button;
}
}
constexpr int FPS = 60;
boost::lockfree::spsc_queue<
int16_t,
boost::lockfree::capacity<16*(AUDIO_FREQ/FPS)> // とりあえず多めで
> audio_queue;
void audio_pull(void* /*userdata*/, uint8_t* stream, int len)
{
assert(!(len&1));
//INFO("%d\n", len);
unsigned int n_sample = len / 2;
int16_t* p = reinterpret_cast<int16_t*>(stream);
size_t n_pop = audio_queue.pop(p, n_sample);
if(n_pop < n_sample){
INFO("UNDERFLOW: %lu samples\n", n_sample - n_pop);
fill_n(p+n_pop, n_sample-n_pop, 0);
}
}
void audio_push(const JunknesSound& sound)
{
assert(allequal(sound.sq1.len,
sound.sq2.len,
sound.tri.len,
sound.noi.len,
sound.dmc.len));
int len = sound.sq1.len;
// CPU周波数とサンプリング周波数が異なるので、1F内では全ての
// データを処理できず余りが出る。offset 変数でそのズレを管理
static int offset = 0;
//constexpr int16_t MUL = 1000;
constexpr double CPU_FREQ = 6.0 * 39375000.0/11.0 / 12.0;
constexpr double STEP = CPU_FREQ / AUDIO_FREQ;
int n_sample = static_cast<int>((len-offset) / STEP);
//INFO("%d\n", n_sample);
// TODO: 1ステップ未満の場合の offset 補正
if(n_sample <= 0) return;
double pos = offset;
int n_written = 0;
while(n_written < n_sample){
int pos_int = static_cast<int>(pos);
uint8_t v_sq1 = sound.sq1.data[pos_int]; // [0, 15]
uint8_t v_sq2 = sound.sq2.data[pos_int]; // [0, 15]
uint8_t v_tri = sound.tri.data[pos_int]; // [0, 15]
uint8_t v_noi = sound.noi.data[pos_int]; // [0, 15]
uint8_t v_dmc = sound.dmc.data[pos_int]; // [0,127]
// http://wiki.nesdev.com/w/index.php/APU_Mixer
double mixed = 0.00752*(v_sq1+v_sq2) + 0.00851*v_tri + 0.00494*v_noi + 0.00335*v_dmc;
int16_t sample = 20000 * (mixed-0.5);
if(audio_queue.push(sample)){
++n_written;
pos += STEP;
}
else{
INFO("OVERFLOW: %lu samples\n", n_sample - n_written);
break;
}
}
if(n_written == n_sample){
offset = static_cast<int>(STEP - (len-pos));
}
else{
// キューがオーバーフローしたらデータを捨てるので offset もリセット
offset = 0;
}
//INFO("%d\n", offset);
}
void draw(SDL_Texture* tex, const uint8_t* screen)
{
uint32_t* p = nullptr;
int pitch = -1;
if(SDL_LockTexture(tex, nullptr, reinterpret_cast<void**>(&p), &pitch) < 0)
error("SDL_LockTexture() failed");
assert(pitch == sizeof(p[0]) * 256);
for(int i = 0; i < 256*240; ++i)
*p++ = PALETTE_RGBA[screen[i]];
SDL_UnlockTexture(tex);
}
constexpr int OP_ARGLEN[0x100] = {
/*0x00*/ 1,1,0,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0x10*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0x20*/ 2,1,0,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0x30*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0x40*/ 0,1,0,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0x50*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0x60*/ 0,1,0,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0x70*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0x80*/ 1,1,1,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0x90*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0xA0*/ 1,1,1,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0xB0*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0xC0*/ 1,1,1,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0xD0*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2,
/*0xE0*/ 1,1,1,1, 1,1,1,1, 0,1,0,1, 2,2,2,2,
/*0xF0*/ 1,1,0,1, 1,1,1,1, 0,2,0,2, 2,2,2,2
};
enum class AdrMode{
NONE,
IM,
ZP,
ZPX,
ZPY,
AB,
ABX,
ABY,
IX,
IY,
REL,
IND,
BRK,
};
constexpr char OP_NAME[0x100][4] = {
/*0x00*/ "brk","ora","kil","slo", "dop","ora","asl","slo", "php","ora","asl","aac", "top","ora","asl","slo",
/*0x10*/ "bpl","ora","kil","slo", "dop","ora","asl","slo", "clc","ora","nop","slo", "top","ora","asl","slo",
/*0x20*/ "jsr","and","kil","rla", "bit","and","rol","rla", "plp","and","rol","aac", "bit","and","rol","rla",
/*0x30*/ "bmi","and","kil","rla", "dop","and","rol","rla", "sec","and","nop","rla", "top","and","rol","rla",
/*0x40*/ "rti","eor","kil","sre", "dop","eor","lsr","sre", "pha","eor","lsr","asr", "jmp","eor","lsr","sre",
/*0x50*/ "bvc","eor","kil","sre", "dop","eor","lsr","sre", "cli","eor","nop","sre", "top","eor","lsr","sre",
/*0x60*/ "rts","adc","kil","rra", "dop","adc","ror","rra", "pla","adc","ror","arr", "jmp","adc","ror","rra",
/*0x70*/ "bvs","adc","kil","rra", "dop","adc","ror","rra", "sei","adc","nop","rra", "top","adc","ror","rra",
/*0x80*/ "dop","sta","dop","aax", "sty","sta","stx","aax", "dey","dop","txa","xaa", "sty","sta","stx","aax",
/*0x90*/ "bcc","sta","kil","axa", "sty","sta","stx","aax", "tya","sta","txs","xas", "sya","sta","sxa","axa",
/*0xA0*/ "ldy","lda","ldx","lax", "ldy","lda","ldx","lax", "tay","lda","tax","atx", "ldy","lda","ldx","lax",
/*0xB0*/ "bcs","lda","kil","lax", "ldy","lda","ldx","lax", "clv","lda","tsx","lar", "ldy","lda","ldx","lax",
/*0xC0*/ "cpy","cmp","dop","dcp", "cpy","cmp","dec","dcp", "iny","cmp","dex","axs", "cpy","cmp","dec","dcp",
/*0xD0*/ "bne","cmp","kil","dcp", "dop","cmp","dec","dcp", "cld","cmp","nop","dcp", "top","cmp","dec","dcp",
/*0xE0*/ "cpx","sbc","dop","isb", "cpx","sbc","inc","isb", "inx","sbc","nop","sbc", "cpx","sbc","inc","isb",
/*0xF0*/ "beq","sbc","kil","isb", "dop","sbc","inc","isb", "sed","sbc","nop","isb", "top","sbc","inc","isb"
};
#define AM AdrMode
constexpr AdrMode OP_ADRMODE[0x100] = {
/*0x00*/ AM::BRK , AM::IX , AM::NONE, AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0x08*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0x10*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPX, AM::ZPX,
/*0x18*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABX, AM::ABX,
/*0x20*/ AM::AB , AM::IX , AM::NONE, AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0x28*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0x30*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPX, AM::ZPX,
/*0x38*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABX, AM::ABX,
/*0x40*/ AM::NONE, AM::IX , AM::NONE, AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0x48*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0x50*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPX, AM::ZPX,
/*0x58*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABX, AM::ABX,
/*0x60*/ AM::NONE, AM::IX , AM::NONE, AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0x68*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::IND, AM::AB , AM::AB , AM::AB ,
/*0x70*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPX, AM::ZPX,
/*0x78*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABX, AM::ABX,
/*0x80*/ AM::IM , AM::IX , AM::IM , AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0x88*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0x90*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPY, AM::ZPY,
/*0x98*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABY, AM::ABY,
/*0xA0*/ AM::IM , AM::IX , AM::IM , AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0xA8*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0xB0*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPY, AM::ZPY,
/*0xB8*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABY, AM::ABY,
/*0xC0*/ AM::IM , AM::IX , AM::IM , AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0xC8*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0xD0*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPX, AM::ZPX,
/*0xD8*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABX, AM::ABX,
/*0xE0*/ AM::IM , AM::IX , AM::IM , AM::IX , AM::ZP , AM::ZP , AM::ZP , AM::ZP ,
/*0xE8*/ AM::NONE, AM::IM , AM::NONE, AM::IM , AM::AB , AM::AB , AM::AB , AM::AB ,
/*0xF0*/ AM::REL , AM::IY , AM::NONE, AM::IY , AM::ZPX, AM::ZPX, AM::ZPX, AM::ZPX,
/*0xF8*/ AM::NONE, AM::ABY, AM::NONE, AM::ABY, AM::ABX, AM::ABX, AM::ABX, AM::ABX
};
#undef AM
string operand_str(int opcode, uint16_t operand)
{
char buf[1024];
switch(OP_ARGLEN[opcode]){
case 0: return "";
case 1:
snprintf(buf, sizeof(buf), " %02X", operand);
return buf;
case 2:
snprintf(buf, sizeof(buf), " %02X %02X", operand&0xFF, operand>>8);
return buf;
default:
// NOT REACHED
assert(false);
return "";
}
}
uint16_t rel_addr(uint16_t addr, uint16_t operand)
{
return addr + 2 + static_cast<int8_t>(operand);
}
string dis_one(uint16_t addr, uint8_t opcode, uint16_t operand)
{
const char* name = OP_NAME[opcode];
char buf[1024];
switch(OP_ADRMODE[opcode]){
case AdrMode::NONE:
snprintf(buf, sizeof(buf), "%s", name);
return buf;
case AdrMode::IM:
snprintf(buf, sizeof(buf), "%s #$%02X", name, operand);
return buf;
case AdrMode::ZP:
snprintf(buf, sizeof(buf), "%s $%02X", name, operand);
return buf;
case AdrMode::ZPX:
snprintf(buf, sizeof(buf), "%s $%02X,x", name, operand);
return buf;
case AdrMode::ZPY:
snprintf(buf, sizeof(buf), "%s $%02X,y", name, operand);
return buf;
case AdrMode::AB:
snprintf(buf, sizeof(buf), "%s $%04X", name, operand);
return buf;
case AdrMode::ABX:
snprintf(buf, sizeof(buf), "%s $%04X,x", name, operand);
return buf;
case AdrMode::ABY:
snprintf(buf, sizeof(buf), "%s $%04X,y", name, operand);
return buf;
case AdrMode::IX:
snprintf(buf, sizeof(buf), "%s ($%02X,x)", name, operand);
return buf;
case AdrMode::IY:
snprintf(buf, sizeof(buf), "%s ($%02X),y", name, operand);
return buf;
case AdrMode::REL:
snprintf(buf, sizeof(buf), "%s $%04X", name, rel_addr(addr, operand));
return buf;
case AdrMode::IND:
snprintf(buf, sizeof(buf), "%s ($%04X)", name, operand);
return buf;
case AdrMode::BRK:
snprintf(buf, sizeof(buf), "%s #$%02X", name, operand);
return buf;
default:
// NOT REACHED
assert(false);
return "";
}
}
string status_str(const JunknesCpuState& st)
{
char buf[1024];
snprintf(buf, sizeof(buf), "%c%c..%c%c%c%c",
st.P.N ? 'N' : '.',
st.P.V ? 'V' : '.',
st.P.D ? 'D' : '.',
st.P.I ? 'I' : '.',
st.P.Z ? 'Z' : '.',
st.P.C ? 'C' : '.');
return buf;
}
void trace_one(const JunknesCpuState* state, uint8_t opcode, uint16_t operand, void*)
{
INFO("%04X\t%02X%-6s\t%-11s\tA:%02X X:%02X Y:%02X S:%02X P:%s\n",
state->PC, opcode, operand_str(opcode, operand).c_str(),
dis_one(state->PC, opcode, operand).c_str(),
state->A, state->X, state->Y, state->S, status_str(*state).c_str());
}
void usage()
{
error("Usage: junknes-sdl2 <INES> [dbg]");
}
}
int main(int argc, char** argv)
{
if(argc < 2) usage();
array<uint8_t, 0x8000> prg;
array<uint8_t, 0x2000> chr;
JunknesMirroring mirror;
if(!ines_split(argv[1], prg, chr, mirror)) error("Cannot load iNES ROM");
bool dbg = argc == 3;
if(SDL_Init(
SDL_INIT_VIDEO |
SDL_INIT_AUDIO |
SDL_INIT_TIMER) != 0) error("SDL_Init() failed");
atexit(SDL_Quit);
{
const char* drv_video = SDL_GetCurrentVideoDriver();
const char* drv_audio = SDL_GetCurrentAudioDriver();
printf("Video driver: %s\n", drv_video ? drv_video : "(null!?)");
printf("Audio driver: %s\n", drv_audio ? drv_audio : "(null!?)");
puts("");
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
SDL_AudioSpec want = {};
#pragma GCC diagnostic pop
want.freq = AUDIO_FREQ;
want.format = AUDIO_FORMAT;
want.channels = AUDIO_CHANNELS;
want.samples = AUDIO_SAMPLES;
want.callback = audio_pull;
puts("[Desired audio spec]");
print_audio_spec(want, false);
puts("");
SDL_AudioSpec have;
SDL_AudioDeviceID audio = SDL_OpenAudioDevice(nullptr, 0, &want, &have, 0);
if(!audio) error("SDL_OpenAudioDevice() failed");
if(want.freq != have.freq ||
want.format != have.format ||
want.channels != have.channels) error("spec changed");
puts("[Obtained audio spec]");
print_audio_spec(have, true);
puts("");
SDL_Window* win = SDL_CreateWindow(
"junknes",
SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
512, 480,
0);
if(!win) error("SDL_CreateWindow() failed");
puts("[Window]");
print_window(win);
puts("");
SDL_Renderer* ren = SDL_CreateRenderer(win, -1, 0);
if(!ren) error("SDL_CreateRenderer() failed");
puts("[Renderer]");
print_renderer(ren);
puts("");
SDL_Texture* tex = SDL_CreateTexture(
ren,
SDL_PIXELFORMAT_RGBA8888,
SDL_TEXTUREACCESS_STREAMING,
256, 240);
if(!tex) error("SDL_CreateTexture() failed");
puts("[Texture]");
print_texture(tex);
puts("");
Junknes* nes = junknes_create(prg.data(), chr.data(), mirror);
if(!nes) error("junknes_create() failed");
if(dbg) junknes_before_exec(nes, trace_one, nullptr);
SDL_PauseAudioDevice(audio, 0);
uint32_t start_ms = SDL_GetTicks();
int frame = 0;
bool running = true;
while(running){
SDL_Event ev;
while(SDL_PollEvent(&ev)){
if(ev.type == SDL_QUIT ||
(ev.type == SDL_KEYDOWN && ev.key.keysym.sym == SDLK_ESCAPE))
running = false;
}
unsigned int inputs[2] = {};
input(inputs);
junknes_set_input(nes, 0, inputs[0]);
junknes_set_input(nes, 1, inputs[1]);
junknes_emulate_frame(nes);
JunknesSound sound;
junknes_sound(nes, &sound);
audio_push(sound);
draw(tex, junknes_screen(nes));
//SDL_RenderClear(ren);
SDL_RenderCopy(ren, tex, nullptr, nullptr);
SDL_RenderPresent(ren);
// TODO: まともなウェイト処理
SDL_Delay(7);
++frame;
if(frame == 1000){
uint32_t end_ms = SDL_GetTicks();
printf("fps: %.2f\n", 1000.0 * frame / (end_ms-start_ms));
start_ms = end_ms;
frame = 0;
}
}
junknes_destroy(nes);
SDL_DestroyTexture(tex);
SDL_DestroyRenderer(ren);
SDL_DestroyWindow(win);
SDL_CloseAudioDevice(audio);
return 0;
}