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Partially implement frameskip

This commit is contained in:
Jeffrey Pfau 2013-05-03 10:24:56 -07:00
parent 3ad2510b78
commit 813b2c0697
2 changed files with 13 additions and 4 deletions
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1
src/gba/gba-video.h
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@ -169,6 +169,7 @@ struct GBAVideoRenderer {
union GBAOAM* oam;
int framesPending;
int frameskip;
int turbo;
};

16
src/gba/renderers/video-software.c
View File

@ -36,6 +36,7 @@ void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
renderer->d.turbo = 0;
renderer->d.framesPending = 0;
renderer->d.frameskip = 0;
{
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
@ -200,6 +201,9 @@ static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* render
static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
if (renderer->frameskip > 0) {
return;
}
uint32_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
if (softwareRenderer->dispcnt.forcedBlank) {
for (int x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
@ -229,10 +233,14 @@ static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* rendere
struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
pthread_mutex_lock(&softwareRenderer->mutex);
renderer->framesPending++;
pthread_cond_broadcast(&softwareRenderer->upCond);
if (!renderer->turbo) {
pthread_cond_wait(&softwareRenderer->downCond, &softwareRenderer->mutex);
if (renderer->frameskip > 0) {
--renderer->frameskip;
} else {
renderer->framesPending++;
pthread_cond_broadcast(&softwareRenderer->upCond);
if (!renderer->turbo) {
pthread_cond_wait(&softwareRenderer->downCond, &softwareRenderer->mutex);
}
}
pthread_mutex_unlock(&softwareRenderer->mutex);
}