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GBA Video: Clean up unused timers

This commit is contained in:
Jeffrey Pfau 2016-09-23 23:11:11 -07:00
parent 7ae3640bb5
commit fc69cdce60
3 changed files with 2 additions and 29 deletions
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1
CHANGES
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@ -29,6 +29,7 @@ Misc:
- SDL: Remove scancode key input
- GB Video: Improved video timings
- All: Split out install locations for Libretro and OpenEmu
- GBA Video: Clean up unused timers
0.5.0: (2016-09-19)
Features:

26
src/gba/video.c
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@ -81,10 +81,6 @@ void GBAVideoReset(struct GBAVideo* video) {
video->nextEvent = video->nextHblank;
video->eventDiff = 0;
video->nextHblankIRQ = 0;
video->nextVblankIRQ = 0;
video->nextVcounterIRQ = 0;
video->frameCounter = 0;
video->frameskipCounter = 0;
@ -122,8 +118,6 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
if (video->nextEvent <= 0) {
int32_t lastEvent = video->nextEvent;
video->nextHblank -= video->eventDiff;
video->nextHblankIRQ -= video->eventDiff;
video->nextVcounterIRQ -= video->eventDiff;
video->eventDiff = 0;
uint16_t dispstat = video->p->memory.io[REG_DISPSTAT >> 1];
@ -142,7 +136,6 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
dispstat = GBARegisterDISPSTATFillVcounter(dispstat);
if (GBARegisterDISPSTATIsVcounterIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_VCOUNTER);
video->nextVcounterIRQ += VIDEO_TOTAL_LENGTH;
}
} else {
dispstat = GBARegisterDISPSTATClearVcounter(dispstat);
@ -159,7 +152,6 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
if (video->frameskipCounter <= 0) {
video->renderer->finishFrame(video->renderer);
}
video->nextVblankIRQ = video->nextEvent + VIDEO_TOTAL_LENGTH;
GBAMemoryRunVblankDMAs(video->p, lastEvent);
if (GBARegisterDISPSTATIsVblankIRQ(dispstat)) {
GBARaiseIRQ(video->p, IRQ_VBLANK);
@ -181,7 +173,6 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
dispstat = GBARegisterDISPSTATFillInHblank(dispstat);
video->nextEvent = video->nextHblank + VIDEO_HBLANK_LENGTH;
video->nextHblank = video->nextEvent + VIDEO_HDRAW_LENGTH;
video->nextHblankIRQ = video->nextHblank;
if (video->vcount < VIDEO_VERTICAL_PIXELS && video->frameskipCounter <= 0) {
video->renderer->drawScanline(video->renderer, video->vcount);
@ -202,16 +193,7 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
void GBAVideoWriteDISPSTAT(struct GBAVideo* video, uint16_t value) {
video->p->memory.io[REG_DISPSTAT >> 1] &= 0x7;
video->p->memory.io[REG_DISPSTAT >> 1] |= value;
uint16_t dispstat = video->p->memory.io[REG_DISPSTAT >> 1];
if (GBARegisterDISPSTATIsVcounterIRQ(dispstat)) {
// FIXME: this can be too late if we're in the middle of an Hblank
video->nextVcounterIRQ = video->nextHblank + VIDEO_HBLANK_LENGTH + (GBARegisterDISPSTATGetVcountSetting(dispstat) - video->vcount) * VIDEO_HORIZONTAL_LENGTH;
if (video->nextVcounterIRQ < video->nextEvent) {
video->nextVcounterIRQ += VIDEO_TOTAL_LENGTH;
}
}
// TODO: Does a VCounter IRQ trigger on write?
}
static void GBAVideoDummyRendererInit(struct GBAVideoRenderer* renderer) {
@ -317,9 +299,6 @@ void GBAVideoSerialize(const struct GBAVideo* video, struct GBASerializedState*
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->nextHblankIRQ, 0, &state->video.nextHblankIRQ);
STORE_32(video->nextVblankIRQ, 0, &state->video.nextVblankIRQ);
STORE_32(video->nextVcounterIRQ, 0, &state->video.nextVcounterIRQ);
STORE_32(video->frameCounter, 0, &state->video.frameCounter);
}
@ -338,9 +317,6 @@ void GBAVideoDeserialize(struct GBAVideo* video, const struct GBASerializedState
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->nextHblankIRQ, 0, &state->video.nextHblankIRQ);
LOAD_32(video->nextVblankIRQ, 0, &state->video.nextVblankIRQ);
LOAD_32(video->nextVcounterIRQ, 0, &state->video.nextVcounterIRQ);
LOAD_32(video->frameCounter, 0, &state->video.frameCounter);
LOAD_16(video->vcount, REG_VCOUNT, state->io);
video->renderer->reset(video->renderer);

4
src/gba/video.h
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@ -187,10 +187,6 @@ struct GBAVideo {
int32_t nextEvent;
int32_t eventDiff;
int32_t nextHblankIRQ;
int32_t nextVblankIRQ;
int32_t nextVcounterIRQ;
uint16_t palette[SIZE_PALETTE_RAM >> 1];
uint16_t* vram;
union GBAOAM oam;