bool _loadStream(struct GBAMGMContext* mgm, uint32_t streamId) {
if (mgm->movieStream && !mgm->movieStream->close(mgm->movieStream)) {
return false;
}
mgm->movieStream = 0;
mgm->streamId = streamId;
mgm->currentInput = INVALID_INPUT;
char buffer[14];
snprintf(buffer, sizeof(buffer), "%u" BINARY_EXT, streamId);
if (mgm->d.isRecording(&mgm->d)) {
int flags = O_CREAT | O_RDWR;
if (streamId > mgm->maxStreamId) {
flags |= O_TRUNC;
}
mgm->movieStream = mgm->streamDir->openFile(mgm->streamDir, buffer, flags);
} else if (mgm->d.isPlaying(&mgm->d)) {
mgm->movieStream = mgm->streamDir->openFile(mgm->streamDir, buffer, O_RDONLY);
mgm->peekedTag = TAG_INVALID;
if (!mgm->movieStream || !_verifyMagic(mgm, mgm->movieStream) || !_seekTag(mgm, mgm->movieStream, TAG_BEGIN)) {
mgm->d.stopPlaying(&mgm->d);
}
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Loading segment: %u", streamId);
mgm->d.frames = 0;
mgm->d.lagFrames = 0;
return true;
}
bool GBARRLoadStream(struct GBARRContext* rr, uint32_t streamId) {
if (rr->movieStream && !rr->movieStream->close(rr->movieStream)) {
return false;
}
rr->movieStream = 0;
rr->streamId = streamId;
rr->currentInput = INVALID_INPUT;
char buffer[14];
snprintf(buffer, sizeof(buffer), "%u" BINARY_EXT, streamId);
if (GBARRIsRecording(rr)) {
int flags = O_CREAT | O_RDWR;
if (streamId > rr->maxStreamId) {
flags |= O_TRUNC;
}
rr->movieStream = rr->streamDir->openFile(rr->streamDir, buffer, flags);
} else if (GBARRIsPlaying(rr)) {
rr->movieStream = rr->streamDir->openFile(rr->streamDir, buffer, O_RDONLY);
rr->peekedTag = TAG_INVALID;
if (!rr->movieStream || !_verifyMagic(rr, rr->movieStream) || !_seekTag(rr, rr->movieStream, TAG_BEGIN)) {
GBARRStopPlaying(rr);
}
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Loading segment: %u", streamId);
rr->frames = 0;
rr->lagFrames = 0;
return true;
}
bool _markStreamNext(struct GBAMGMContext* mgm, uint32_t newStreamId, bool recursive) {
if (mgm->movieStream->seek(mgm->movieStream, -sizeof(newStreamId) - 1, SEEK_END) < 0) {
return false;
}
uint8_t tagBuffer;
if (mgm->movieStream->read(mgm->movieStream, &tagBuffer, 1) != 1) {
return false;
}
if (tagBuffer != TAG_NEXT_TIME) {
return false;
}
if (mgm->movieStream->write(mgm->movieStream, &newStreamId, sizeof(newStreamId)) != sizeof(newStreamId)) {
return false;
}
if (recursive) {
if (mgm->movieStream->seek(mgm->movieStream, 0, SEEK_SET) < 0) {
return false;
}
if (!_verifyMagic(mgm, mgm->movieStream)) {
return false;
}
_readTag(mgm, mgm->movieStream);
if (_readTag(mgm, mgm->movieStream) != TAG_PREVIOUSLY) {
return false;
}
if (mgm->previously == 0) {
return true;
}
uint32_t currentStreamId = mgm->streamId;
if (!_loadStream(mgm, mgm->previously)) {
return false;
}
return _markStreamNext(mgm, currentStreamId, mgm->previously);
}
return true;
}
bool _parseMetadata(struct GBAMGMContext* mgm, struct VFile* vf) {
if (!_verifyMagic(mgm, vf)) {
return false;
}
while (_readTag(mgm, vf) != TAG_EOF) {
switch (mgm->peekedTag) {
case TAG_MAX_STREAM:
mgm->maxStreamIdOffset = vf->seek(vf, 0, SEEK_CUR);
break;
case TAG_INIT_EX_NIHILO:
case TAG_INIT_FROM_SAVEGAME:
case TAG_INIT_FROM_SAVESTATE:
case TAG_INIT_FROM_BOTH:
mgm->initFromOffset = vf->seek(vf, 0, SEEK_CUR);
break;
case TAG_RR_COUNT:
mgm->rrCountOffset = vf->seek(vf, 0, SEEK_CUR);
break;
default:
break;
}
}
return true;
}
