GBA RR: Add VBM parser, for comparing VBA sync

src/gba/rr/vbm.c

@@ -0,0 +1,183 @@
+/* Copyright (c) 2013-2015 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "vbm.h"
+
+#include "gba/gba.h"
+#include "gba/serialize.h"
+#include "util/vfs.h"
+
+static const char VBM_MAGIC[] = "VBM\x1A";
+
+static void GBAVBMContextDestroy(struct GBARRContext*);
+
+static bool GBAVBMStartPlaying(struct GBARRContext*, bool autorecord);
+static void GBAVBMStopPlaying(struct GBARRContext*);
+static bool GBAVBMStartRecording(struct GBARRContext*);
+static void GBAVBMStopRecording(struct GBARRContext*);
+
+static bool GBAVBMIsPlaying(const struct GBARRContext*);
+static bool GBAVBMIsRecording(const struct GBARRContext*);
+
+static void GBAVBMNextFrame(struct GBARRContext*);
+static uint16_t GBAVBMQueryInput(struct GBARRContext*);
+
+static void GBAVBMStateSaved(struct GBARRContext* rr, struct GBASerializedState* state);
+static void GBAVBMStateLoaded(struct GBARRContext* rr, const struct GBASerializedState* state);
+
+static struct VFile* GBAVBMOpenSavedata(struct GBARRContext*, int flags);
+static struct VFile* GBAVBMOpenSavestate(struct GBARRContext*, int flags);
+
+void GBAVBMContextCreate(struct GBAVBMContext* vbm) {
+	memset(vbm, 0, sizeof(*vbm));
+
+	vbm->d.destroy = GBAVBMContextDestroy;
+
+	vbm->d.startPlaying = GBAVBMStartPlaying;
+	vbm->d.stopPlaying = GBAVBMStopPlaying;
+	vbm->d.startRecording = GBAVBMStartRecording;
+	vbm->d.stopRecording = GBAVBMStopRecording;
+
+	vbm->d.isPlaying = GBAVBMIsPlaying;
+	vbm->d.isRecording = GBAVBMIsRecording;
+
+	vbm->d.nextFrame = GBAVBMNextFrame;
+	vbm->d.logInput = 0;
+	vbm->d.queryInput = GBAVBMQueryInput;
+
+	vbm->d.stateSaved = GBAVBMStateSaved;
+	vbm->d.stateLoaded = GBAVBMStateLoaded;
+
+	vbm->d.openSavedata = GBAVBMOpenSavedata;
+	vbm->d.openSavestate = GBAVBMOpenSavestate;
+}
+
+bool GBAVBMStartPlaying(struct GBARRContext* rr, bool autorecord) {
+	if (rr->isRecording(rr) || rr->isPlaying(rr) || autorecord) {
+		return false;
+	}
+
+	struct GBAVBMContext* vbm = (struct GBAVBMContext*) rr;
+	vbm->isPlaying = true;
+	vbm->vbmFile->seek(vbm->vbmFile, vbm->inputOffset, SEEK_SET);
+	return true;
+}
+
+void GBAVBMStopPlaying(struct GBARRContext* rr) {
+	if (!rr->isPlaying(rr)) {
+		return;
+	}
+
+	struct GBAVBMContext* vbm = (struct GBAVBMContext*) rr;
+	vbm->isPlaying = false;
+}
+
+bool GBAVBMStartRecording(struct GBARRContext* rr) {
+	UNUSED(rr);
+	return false;
+}
+
+void GBAVBMStopRecording(struct GBARRContext* rr) {
+	UNUSED(rr);
+}
+
+bool GBAVBMIsPlaying(const struct GBARRContext* rr) {
+	struct GBAVBMContext* vbm = (struct GBAVBMContext*) rr;
+	return vbm->isPlaying;
+}
+
+bool GBAVBMIsRecording(const struct GBARRContext* rr) {
+	UNUSED(rr);
+	return false;
+}
+
+void GBAVBMNextFrame(struct GBARRContext* rr) {
+	UNUSED(rr);
+}
+
+uint16_t GBAVBMQueryInput(struct GBARRContext* rr) {
+	if (!rr->isPlaying(rr)) {
+		return 0;
+	}
+
+	struct GBAVBMContext* vbm = (struct GBAVBMContext*) rr;
+	uint16_t input;
+	vbm->vbmFile->read(vbm->vbmFile, &input, sizeof(input));
+	return input & 0x3FF;
+}
+
+void GBAVBMStateSaved(struct GBARRContext* rr, struct GBASerializedState* state) {
+	UNUSED(rr);
+	UNUSED(state);
+}
+
+void GBAVBMStateLoaded(struct GBARRContext* rr, const struct GBASerializedState* state) {
+	UNUSED(rr);
+	UNUSED(state);
+}
+
+struct VFile* GBAVBMOpenSavedata(struct GBARRContext* rr, int flags) {
+	UNUSED(rr);
+	UNUSED(flags);
+	return 0;
+}
+
+struct VFile* GBAVBMOpenSavestate(struct GBARRContext* rr, int flags) {
+	UNUSED(rr);
+	UNUSED(flags);
+	return 0;
+}
+
+void GBAVBMContextDestroy(struct GBARRContext* rr) {
+	struct GBAVBMContext* vbm = (struct GBAVBMContext*) rr;
+	if (vbm->vbmFile) {
+		vbm->vbmFile->close(vbm->vbmFile);
+	}
+}
+
+bool GBAVBMSetStream(struct GBAVBMContext* vbm, struct VFile* vf) {
+	vf->seek(vf, 0, SEEK_SET);
+	char magic[4];
+	vf->read(vf, magic, sizeof(magic));
+	if (memcmp(magic, VBM_MAGIC, sizeof(magic)) != 0) {
+		return false;
+	}
+
+	uint32_t id;
+	vf->read(vf, &id, sizeof(id));
+	if (id != 1) {
+		return false;
+	}
+
+	vf->seek(vf, 4, SEEK_CUR);
+	vf->read(vf, &vbm->d.frames, sizeof(vbm->d.frames));
+	vf->read(vf, &vbm->d.rrCount, sizeof(vbm->d.rrCount));
+
+	uint8_t flags;
+	vf->read(vf, &flags, sizeof(flags));
+	if (flags & 1) {
+		// Incompatible savestate format
+		return false;
+	}
+	if (flags & 2) {
+		// TODO: Implement SRAM loading
+		return false;
+	}
+
+	vf->seek(vf, 1, SEEK_CUR);
+	vf->read(vf, &flags, sizeof(flags));
+	if ((flags & 0x7) != 1) {
+		// Non-GBA movie
+		return false;
+	}
+
+	// TODO: parse more flags
+
+	vf->seek(vf, 0x3C, SEEK_SET);
+	vf->read(vf, &vbm->inputOffset, sizeof(vbm->inputOffset));
+	vf->seek(vf, vbm->inputOffset, SEEK_SET);
+	vbm->vbmFile = vf;
+	return true;
+}

src/gba/rr/vbm.h

@@ -0,0 +1,21 @@
+/* Copyright (c) 2013-2015 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "util/common.h"
+
+#include "gba/supervisor/rr.h"
+
+struct GBAVBMContext {
+	struct GBARRContext d;
+
+	bool isPlaying;
+
+	struct VFile* vbmFile;
+	int32_t inputOffset;
+};
+
+void GBAVBMContextCreate(struct GBAVBMContext*);
+
+bool GBAVBMSetStream(struct GBAVBMContext*, struct VFile*);

src/gba/supervisor/thread.c

@@ -11,6 +11,7 @@
 #include "gba/serialize.h"
 #include "gba/supervisor/config.h"
 #include "gba/rr/mgm.h"
+#include "gba/rr/vbm.h"
 
 #include "debugger/debugger.h"
 
@@ -187,6 +188,17 @@ static THREAD_ENTRY _GBAThreadRun(void* context) {
 			} else {
 				movie = &mgm->d;
 			}
+		} else {
+			struct VFile* movieFile = VFileOpen(threadContext->movie, O_RDONLY);
+			if (movieFile) {
+				struct GBAVBMContext* vbm = malloc(sizeof(*vbm));
+				GBAVBMContextCreate(vbm);
+				if (!GBAVBMSetStream(vbm, movieFile)) {
+					vbm->d.destroy(&vbm->d);
+				} else {
+					movie = &vbm->d;
+				}
+			}
 		}
 	}