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GBA Video: Convert video to mTiming

This commit is contained in:
Jeffrey Pfau 2016-10-07 12:29:10 -07:00
parent c056acb98f
commit 5b50c43857
3 changed files with 79 additions and 98 deletions
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10
src/gba/gba.c
View File

@ -254,16 +254,6 @@ static void GBAProcessEvents(struct ARMCore* cpu) {
nextEvent = cpu->nextEvent;
} while (gba->cpuBlocked);
testEvent = GBAVideoProcessEvents(&gba->video, cycles);
if (testEvent < nextEvent) {
#ifndef NDEBUG
if (testEvent == 0) {
mLOG(GBA, ERROR, "Video requiring 0 cycles");
}
#endif
nextEvent = testEvent;
}
testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
if (testEvent < nextEvent) {
#ifndef NDEBUG

160
src/gba/video.c
View File

@ -29,6 +29,9 @@ static void GBAVideoDummyRendererFinishFrame(struct GBAVideoRenderer* renderer);
static void GBAVideoDummyRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
static void GBAVideoDummyRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
static void _startHblank(struct mTiming*, void* context, uint32_t cyclesLate);
static void _startHdraw(struct mTiming*, void* context, uint32_t cyclesLate);
const int GBAVideoObjSizes[16][2] = {
{ 8, 8 },
{ 16, 16 },
@ -67,6 +70,9 @@ void GBAVideoInit(struct GBAVideo* video) {
video->renderer->cache = NULL;
video->vram = 0;
video->frameskip = 0;
video->event.name = "GBA Video";
video->event.callback = NULL;
video->event.context = video;
}
void GBAVideoReset(struct GBAVideo* video) {
@ -78,9 +84,8 @@ void GBAVideoReset(struct GBAVideo* video) {
}
video->p->memory.io[REG_VCOUNT >> 1] = video->vcount;
video->nextHblank = VIDEO_HDRAW_LENGTH;
video->nextEvent = video->nextHblank;
video->eventDiff = 0;
video->event.callback = _startHblank;
mTimingSchedule(&video->p->timing, &video->event, VIDEO_HDRAW_LENGTH);
video->frameCounter = 0;
video->frameskipCounter = 0;
@ -113,82 +118,77 @@ void GBAVideoAssociateRenderer(struct GBAVideo* video, struct GBAVideoRenderer*
video->renderer->init(video->renderer);
}
int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
video->nextEvent -= cycles;
video->eventDiff += cycles;
if (video->nextEvent <= 0) {
int32_t lastEvent = video->nextEvent;
video->nextHblank -= video->eventDiff;
video->eventDiff = 0;
uint16_t dispstat = video->p->memory.io[REG_DISPSTAT >> 1];
void _startHdraw(struct mTiming* timing, void* context, uint32_t cyclesLate) {
struct GBAVideo* video = context;
GBARegisterDISPSTAT dispstat = video->p->memory.io[REG_DISPSTAT >> 1];
dispstat = GBARegisterDISPSTATClearInHblank(dispstat);
video->event.callback = _startHblank;
mTimingSchedule(timing, &video->event, VIDEO_HDRAW_LENGTH - cyclesLate);
if (GBARegisterDISPSTATIsInHblank(dispstat)) {
// End Hblank
dispstat = GBARegisterDISPSTATClearInHblank(dispstat);
video->nextEvent = video->nextHblank;
++video->vcount;
if (video->vcount == VIDEO_VERTICAL_TOTAL_PIXELS) {
video->vcount = 0;
}
video->p->memory.io[REG_VCOUNT >> 1] = video->vcount;
if (video->vcount == GBARegisterDISPSTATGetVcountSetting(dispstat)) {
dispstat = GBARegisterDISPSTATFillVcounter(dispstat);
if (GBARegisterDISPSTATIsVcounterIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_VCOUNTER);
}
} else {
dispstat = GBARegisterDISPSTATClearVcounter(dispstat);
}
video->p->memory.io[REG_DISPSTAT >> 1] = dispstat;
// Note: state may be recorded during callbacks, so ensure it is consistent!
switch (video->vcount) {
case 0:
GBAFrameStarted(video->p);
break;
case VIDEO_VERTICAL_PIXELS:
video->p->memory.io[REG_DISPSTAT >> 1] = GBARegisterDISPSTATFillInVblank(dispstat);
if (video->frameskipCounter <= 0) {
video->renderer->finishFrame(video->renderer);
}
GBAMemoryRunVblankDMAs(video->p, lastEvent);
if (GBARegisterDISPSTATIsVblankIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_VBLANK);
}
GBAFrameEnded(video->p);
--video->frameskipCounter;
if (video->frameskipCounter < 0) {
mCoreSyncPostFrame(video->p->sync);
video->frameskipCounter = video->frameskip;
}
++video->frameCounter;
break;
case VIDEO_VERTICAL_TOTAL_PIXELS - 1:
video->p->memory.io[REG_DISPSTAT >> 1] = GBARegisterDISPSTATClearInVblank(dispstat);
break;
}
} else {
// Begin Hblank
dispstat = GBARegisterDISPSTATFillInHblank(dispstat);
video->nextEvent = video->nextHblank + VIDEO_HBLANK_LENGTH;
video->nextHblank = video->nextEvent + VIDEO_HDRAW_LENGTH;
if (video->vcount < VIDEO_VERTICAL_PIXELS && video->frameskipCounter <= 0) {
video->renderer->drawScanline(video->renderer, video->vcount);
}
if (video->vcount < VIDEO_VERTICAL_PIXELS) {
GBAMemoryRunHblankDMAs(video->p, lastEvent);
}
if (GBARegisterDISPSTATIsHblankIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_HBLANK);
}
video->p->memory.io[REG_DISPSTAT >> 1] = dispstat;
}
++video->vcount;
if (video->vcount == VIDEO_VERTICAL_TOTAL_PIXELS) {
video->vcount = 0;
}
return video->nextEvent;
video->p->memory.io[REG_VCOUNT >> 1] = video->vcount;
if (video->vcount == GBARegisterDISPSTATGetVcountSetting(dispstat)) {
dispstat = GBARegisterDISPSTATFillVcounter(dispstat);
if (GBARegisterDISPSTATIsVcounterIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_VCOUNTER);
}
} else {
dispstat = GBARegisterDISPSTATClearVcounter(dispstat);
}
video->p->memory.io[REG_DISPSTAT >> 1] = dispstat;
// Note: state may be recorded during callbacks, so ensure it is consistent!
switch (video->vcount) {
case 0:
GBAFrameStarted(video->p);
break;
case VIDEO_VERTICAL_PIXELS:
video->p->memory.io[REG_DISPSTAT >> 1] = GBARegisterDISPSTATFillInVblank(dispstat);
if (video->frameskipCounter <= 0) {
video->renderer->finishFrame(video->renderer);
}
GBAMemoryRunVblankDMAs(video->p, -cyclesLate);
if (GBARegisterDISPSTATIsVblankIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_VBLANK);
}
GBAFrameEnded(video->p);
--video->frameskipCounter;
if (video->frameskipCounter < 0) {
mCoreSyncPostFrame(video->p->sync);
video->frameskipCounter = video->frameskip;
}
++video->frameCounter;
break;
case VIDEO_VERTICAL_TOTAL_PIXELS - 1:
video->p->memory.io[REG_DISPSTAT >> 1] = GBARegisterDISPSTATClearInVblank(dispstat);
break;
}
}
void _startHblank(struct mTiming* timing, void* context, uint32_t cyclesLate) {
struct GBAVideo* video = context;
GBARegisterDISPSTAT dispstat = video->p->memory.io[REG_DISPSTAT >> 1];
dispstat = GBARegisterDISPSTATFillInHblank(dispstat);
video->event.callback = _startHdraw;
mTimingSchedule(timing, &video->event, VIDEO_HBLANK_LENGTH - cyclesLate);
// Begin Hblank
dispstat = GBARegisterDISPSTATFillInHblank(dispstat);
if (video->vcount < VIDEO_VERTICAL_PIXELS && video->frameskipCounter <= 0) {
video->renderer->drawScanline(video->renderer, video->vcount);
}
if (video->vcount < VIDEO_VERTICAL_PIXELS) {
GBAMemoryRunHblankDMAs(video->p, -cyclesLate);
}
if (GBARegisterDISPSTATIsHblankIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_HBLANK);
}
video->p->memory.io[REG_DISPSTAT >> 1] = dispstat;
}
void GBAVideoWriteDISPSTAT(struct GBAVideo* video, uint16_t value) {
@ -297,9 +297,6 @@ void GBAVideoSerialize(const struct GBAVideo* video, struct GBASerializedState*
memcpy(state->vram, video->renderer->vram, SIZE_VRAM);
memcpy(state->oam, video->oam.raw, SIZE_OAM);
memcpy(state->pram, video->palette, SIZE_PALETTE_RAM);
STORE_32(video->nextEvent, 0, &state->video.nextEvent);
STORE_32(video->eventDiff, 0, &state->video.eventDiff);
STORE_32(video->nextHblank, 0, &state->video.nextHblank);
STORE_32(video->frameCounter, 0, &state->video.frameCounter);
}
@ -315,9 +312,6 @@ void GBAVideoDeserialize(struct GBAVideo* video, const struct GBASerializedState
LOAD_16(value, i, state->pram);
GBAStore16(video->p->cpu, BASE_PALETTE_RAM | i, value, 0);
}
LOAD_32(video->nextEvent, 0, &state->video.nextEvent);
LOAD_32(video->eventDiff, 0, &state->video.eventDiff);
LOAD_32(video->nextHblank, 0, &state->video.nextHblank);
LOAD_32(video->frameCounter, 0, &state->video.frameCounter);
LOAD_16(video->vcount, REG_VCOUNT, state->io);
video->renderer->reset(video->renderer);

7
src/gba/video.h
View File

@ -9,6 +9,7 @@
#include "util/common.h"
#include "core/core.h"
#include "core/timing.h"
#include "gba/memory.h"
mLOG_DECLARE_CATEGORY(GBA_VIDEO);
@ -171,14 +172,11 @@ struct GBAVideoRenderer {
struct GBAVideo {
struct GBA* p;
struct GBAVideoRenderer* renderer;
struct mTimingEvent event;
// VCOUNT
int vcount;
int32_t nextHblank;
int32_t nextEvent;
int32_t eventDiff;
uint16_t palette[SIZE_PALETTE_RAM >> 1];
uint16_t* vram;
union GBAOAM oam;
@ -192,7 +190,6 @@ void GBAVideoInit(struct GBAVideo* video);
void GBAVideoReset(struct GBAVideo* video);
void GBAVideoDeinit(struct GBAVideo* video);
void GBAVideoAssociateRenderer(struct GBAVideo* video, struct GBAVideoRenderer* renderer);
int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles);
void GBAVideoWriteDISPSTAT(struct GBAVideo* video, uint16_t value);