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mgba
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Loading savestates now changes the active branch

This commit is contained in:
Jeffrey Pfau 2014-08-05 23:52:08 -07:00
parent 5ee336d274
commit 0389237fc6
3 changed files with 92 additions and 33 deletions
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112
src/gba/gba-rr.c
View File

@ -13,8 +13,12 @@ static bool _verifyMagic(struct GBARRContext* rr, struct VFile* vf);
static enum GBARRTag _readTag(struct GBARRContext* rr, struct VFile* vf);
static bool _seekTag(struct GBARRContext* rr, struct VFile* vf, enum GBARRTag tag);
static bool _emitTag(struct GBARRContext* rr, struct VFile* vf, uint8_t tag);
static bool _emitEnd(struct GBARRContext* rr, struct VFile* vf);
static bool _parseMetadata(struct GBARRContext* rr, struct VFile* vf);
static bool _markStreamNext(struct GBARRContext* rr, uint32_t newStreamId, bool recursive);
static struct VFile* _openSavedata(struct GBARRContext* rr, int flags);
static struct VFile* _openSavestate(struct GBARRContext* rr, int flags);
@ -113,7 +117,7 @@ bool GBARRInitStream(struct GBARRContext* rr, struct VDir* stream) {
if (!_parseMetadata(rr, rr->metadataFile)) {
rr->metadataFile->close(rr->metadataFile);
rr->metadataFile = 0;
rr->maxStreamId = 1;
rr->maxStreamId = 0;
}
rr->streamId = 1;
rr->movieStream = 0;
@ -136,8 +140,8 @@ bool GBARRReinitStream(struct GBARRContext* rr, enum GBARRInitFrom initFrom) {
rr->initFromOffset = rr->metadataFile->seek(rr->metadataFile, 0, SEEK_CUR);
_emitTag(rr, rr->metadataFile, TAG_INIT | initFrom);
rr->streamId = 1;
rr->maxStreamId = 1;
rr->streamId = 0;
rr->maxStreamId = 0;
rr->maxStreamIdOffset = rr->metadataFile->seek(rr->metadataFile, 0, SEEK_CUR);
_emitTag(rr, rr->metadataFile, 1);
return true;
@ -152,11 +156,9 @@ bool GBARRLoadStream(struct GBARRContext* rr, uint32_t streamId) {
char buffer[14];
snprintf(buffer, sizeof(buffer), "%u" BINARY_EXT, streamId);
if (GBARRIsRecording(rr)) {
int flags = O_CREAT | O_WRONLY;
int flags = O_CREAT | O_RDWR;
if (streamId > rr->maxStreamId) {
flags |= O_TRUNC;
} else {
flags |= O_APPEND;
}
rr->movieStream = rr->streamDir->openFile(rr->streamDir, buffer, flags);
} else if (GBARRIsPlaying(rr)) {
@ -171,17 +173,13 @@ bool GBARRLoadStream(struct GBARRContext* rr, uint32_t streamId) {
return true;
}
bool GBARRIncrementStream(struct GBARRContext* rr) {
bool GBARRIncrementStream(struct GBARRContext* rr, bool recursive) {
uint32_t newStreamId = rr->maxStreamId + 1;
uint32_t oldStreamId = rr->streamId;
if (GBARRIsRecording(rr) && rr->movieStream) {
_emitTag(rr, rr->movieStream, TAG_END);
_emitTag(rr, rr->movieStream, TAG_FRAME_COUNT);
rr->movieStream->write(rr->movieStream, &rr->frames, sizeof(rr->frames));
_emitTag(rr, rr->movieStream, TAG_LAG_COUNT);
rr->movieStream->write(rr->movieStream, &rr->lagFrames, sizeof(rr->lagFrames));
_emitTag(rr, rr->movieStream, TAG_NEXT_TIME);
rr->movieStream->write(rr->movieStream, &newStreamId, sizeof(newStreamId));
if (!_markStreamNext(rr, newStreamId, recursive)) {
return false;
}
}
if (!GBARRLoadStream(rr, newStreamId)) {
return false;
@ -194,6 +192,7 @@ bool GBARRIncrementStream(struct GBARRContext* rr) {
rr->metadataFile->seek(rr->metadataFile, rr->maxStreamIdOffset, SEEK_SET);
rr->metadataFile->write(rr->movieStream, &rr->maxStreamId, sizeof(rr->maxStreamId));
rr->previously = oldStreamId;
return true;
}
@ -216,6 +215,12 @@ bool GBARRStartPlaying(struct GBARRContext* rr, bool autorecord) {
rr->peekedTag = TAG_INVALID;
_readTag(rr, rr->movieStream); // Discard the buffer
enum GBARRTag tag = _readTag(rr, rr->movieStream);
if (tag == TAG_PREVIOUSLY) {
if (rr->previously != 0) {
return false;
}
tag = _readTag(rr, rr->movieStream);
}
if (tag != TAG_BEGIN) {
rr->movieStream->close(rr->movieStream);
rr->movieStream = 0;
@ -242,19 +247,6 @@ bool GBARRStartRecording(struct GBARRContext* rr) {
return false;
}
char buffer[14];
snprintf(buffer, sizeof(buffer), "%u" BINARY_EXT, rr->streamId);
rr->movieStream = rr->streamDir->openFile(rr->streamDir, buffer, O_TRUNC | O_CREAT | O_WRONLY);
if (!rr->movieStream) {
return false;
}
_emitMagic(rr, rr->movieStream);
if (!_emitTag(rr, rr->movieStream, TAG_BEGIN)) {
rr->movieStream->close(rr->movieStream);
rr->movieStream = 0;
return false;
}
if (!rr->maxStreamIdOffset) {
_emitTag(rr, rr->metadataFile, TAG_MAX_STREAM);
rr->maxStreamIdOffset = rr->metadataFile->seek(rr->metadataFile, 0, SEEK_CUR);
@ -262,7 +254,7 @@ bool GBARRStartRecording(struct GBARRContext* rr) {
}
rr->isRecording = true;
return true;
return GBARRIncrementStream(rr, false);
}
void GBARRStopRecording(struct GBARRContext* rr) {
@ -312,7 +304,7 @@ void GBARRNextFrame(struct GBARRContext* rr) {
if (rr->autorecord) {
rr->isRecording = true;
GBARRLoadStream(rr, endStreamId);
GBARRIncrementStream(rr);
GBARRIncrementStream(rr, false);
}
}
}
@ -342,6 +334,15 @@ uint16_t GBARRQueryInput(struct GBARRContext* rr) {
return rr->currentInput;
}
bool GBARRFinishSegment(struct GBARRContext* rr) {
if (rr->movieStream) {
if (!_emitEnd(rr, rr->movieStream)) {
return false;
}
}
return GBARRIncrementStream(rr, false);
}
bool GBARRSkipSegment(struct GBARRContext* rr) {
rr->nextTime = 0;
while (_readTag(rr, rr->movieStream) != TAG_EOF);
@ -474,6 +475,59 @@ bool _parseMetadata(struct GBARRContext* rr, struct VFile* vf) {
return true;
}
bool _emitEnd(struct GBARRContext* rr, struct VFile* vf) {
// TODO: Error check
_emitTag(rr, vf, TAG_END);
_emitTag(rr, vf, TAG_FRAME_COUNT);
vf->write(vf, &rr->frames, sizeof(rr->frames));
_emitTag(rr, vf, TAG_LAG_COUNT);
vf->write(vf, &rr->lagFrames, sizeof(rr->lagFrames));
_emitTag(rr, vf, TAG_NEXT_TIME);
uint32_t newStreamId = 0;
vf->write(vf, &newStreamId, sizeof(newStreamId));
return true;
}
bool _markStreamNext(struct GBARRContext* rr, uint32_t newStreamId, bool recursive) {
if (rr->movieStream->seek(rr->movieStream, -sizeof(newStreamId) - 1, SEEK_END) < 0) {
return false;
}
uint8_t tagBuffer;
if (rr->movieStream->read(rr->movieStream, &tagBuffer, 1) != 1) {
return false;
}
if (tagBuffer != TAG_NEXT_TIME) {
return false;
}
if (rr->movieStream->write(rr->movieStream, &newStreamId, sizeof(newStreamId)) != sizeof(newStreamId)) {
return false;
}
if (recursive) {
if (rr->movieStream->seek(rr->movieStream, 0, SEEK_SET) < 0) {
return false;
}
if (!_verifyMagic(rr, rr->movieStream)) {
return false;
}
_readTag(rr, rr->movieStream);
if (_readTag(rr, rr->movieStream) != TAG_PREVIOUSLY) {
return false;
}
if (rr->previously == 0) {
return true;
}
uint32_t currentStreamId = rr->streamId;
if (!GBARRLoadStream(rr, rr->previously)) {
return false;
}
return _markStreamNext(rr, currentStreamId, rr->previously);
}
return true;
}
struct VFile* _openSavedata(struct GBARRContext* rr, int flags) {
return rr->streamDir->openFile(rr->streamDir, "movie.sav", flags);
}

3
src/gba/gba-rr.h
View File

@ -85,7 +85,8 @@ void GBARRLoadState(struct GBA*);
bool GBARRInitStream(struct GBARRContext*, struct VDir*);
bool GBARRReinitStream(struct GBARRContext*, enum GBARRInitFrom);
bool GBARRLoadStream(struct GBARRContext*, uint32_t streamId);
bool GBARRIncrementStream(struct GBARRContext*);
bool GBARRIncrementStream(struct GBARRContext*, bool recursive);
bool GBARRFinishSegment(struct GBARRContext*);
bool GBARRSkipSegment(struct GBARRContext*);
bool GBARRStartPlaying(struct GBARRContext*, bool autorecord);

10
src/gba/gba-serialize.c
View File

@ -39,7 +39,7 @@ void GBASerialize(struct GBA* gba, struct GBASerializedState* state) {
if (GBARRIsRecording(gba->rr)) {
state->associatedStreamId = gba->rr->streamId;
GBARRIncrementStream(gba->rr);
GBARRFinishSegment(gba->rr);
} else {
state->associatedStreamId = 0;
}
@ -80,8 +80,12 @@ void GBADeserialize(struct GBA* gba, struct GBASerializedState* state) {
GBAAudioDeserialize(&gba->audio, state);
if (GBARRIsRecording(gba->rr)) {
GBARRLoadStream(gba->rr, state->associatedStreamId);
GBARRIncrementStream(gba->rr);
if (state->associatedStreamId != gba->rr->streamId) {
GBARRLoadStream(gba->rr, state->associatedStreamId);
GBARRIncrementStream(gba->rr, true);
} else {
GBARRFinishSegment(gba->rr);
}
} else if (GBARRIsPlaying(gba->rr)) {
GBARRLoadStream(gba->rr, state->associatedStreamId);
GBARRSkipSegment(gba->rr);