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Rewind now compatible with ZMVs.

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This commit is contained in:
n-a-c-h
2005-03-22 23:21:08 +00:00
parent 8c70b59e9a
commit eeae3836d6
2 changed files with 104 additions and 23 deletions
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111
zsnes/src/zmovie.c
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@@ -488,34 +488,37 @@ static struct
char *filename;
} zmv_vars;
static void save_last_joy_state(unsigned char *buffer)
{
buffer[0] = (zmv_vars.last_joy_state.A >> 4) & 0xFF;
buffer[1] = ((zmv_vars.last_joy_state.A << 4) & 0xF0) | ((zmv_vars.last_joy_state.B >> 8) & 0x0F);
buffer[2] = zmv_vars.last_joy_state.B & 0xFF;
buffer[3] = (zmv_vars.last_joy_state.C >> 4) & 0xFF;
buffer[4] = ((zmv_vars.last_joy_state.C << 4) & 0xF0) | ((zmv_vars.last_joy_state.D >> 8) & 0x0F);
buffer[5] = zmv_vars.last_joy_state.D & 0xFF;
buffer[6] = (zmv_vars.last_joy_state.E >> 4) & 0xFF;
buffer[7] = (zmv_vars.last_joy_state.E << 4) & 0xF0;
}
static void load_last_joy_state(unsigned char *buffer)
{
zmv_vars.last_joy_state.A = (((unsigned short)(buffer[0])) << 4) | ((buffer[1] & 0xF0) >> 4);
zmv_vars.last_joy_state.B = (((unsigned short)(buffer[1] & 0x0F)) << 8) | buffer[2];
zmv_vars.last_joy_state.C = (((unsigned short)(buffer[3])) << 4) | ((buffer[4] & 0xF0) >> 4);
zmv_vars.last_joy_state.D = (((unsigned short)(buffer[4] & 0x0F)) << 8) | buffer[5];
zmv_vars.last_joy_state.E = (((unsigned short)(buffer[6])) << 4) | ((buffer[7] & 0xF0) >> 4);
}
static void write_last_joy_state(FILE *fp)
{
zmv_vars.write_buffer[0] = (zmv_vars.last_joy_state.A >> 4) & 0xFF;
zmv_vars.write_buffer[1] = ((zmv_vars.last_joy_state.A << 4) & 0xF0) | ((zmv_vars.last_joy_state.B >> 8) & 0x0F);
zmv_vars.write_buffer[2] = zmv_vars.last_joy_state.B & 0xFF;
zmv_vars.write_buffer[3] = (zmv_vars.last_joy_state.C >> 4) & 0xFF;
zmv_vars.write_buffer[4] = ((zmv_vars.last_joy_state.C << 4) & 0xF0) | ((zmv_vars.last_joy_state.D >> 8) & 0x0F);
zmv_vars.write_buffer[5] = zmv_vars.last_joy_state.D & 0xFF;
zmv_vars.write_buffer[6] = (zmv_vars.last_joy_state.E >> 4) & 0xFF;
zmv_vars.write_buffer[7] = (zmv_vars.last_joy_state.E << 4) & 0xF0;
save_last_joy_state(zmv_vars.write_buffer);
fwrite(zmv_vars.write_buffer, 8, 1, fp);
}
static void read_last_joy_state(FILE *fp)
{
fread(zmv_vars.write_buffer, 8, 1, fp);
zmv_vars.last_joy_state.A = (((unsigned short)(zmv_vars.write_buffer[0])) << 4) |
((zmv_vars.write_buffer[1] & 0xF0) >> 4);
zmv_vars.last_joy_state.B = (((unsigned short)(zmv_vars.write_buffer[1] & 0x0F)) << 8) |
zmv_vars.write_buffer[2];
zmv_vars.last_joy_state.C = (((unsigned short)(zmv_vars.write_buffer[3])) << 4) |
((zmv_vars.write_buffer[4] & 0xF0) >> 4);
zmv_vars.last_joy_state.D = (((unsigned short)(zmv_vars.write_buffer[4] & 0x0F)) << 8) |
zmv_vars.write_buffer[5];
zmv_vars.last_joy_state.E = (((unsigned short)(zmv_vars.write_buffer[6])) << 4) |
((zmv_vars.write_buffer[7] & 0xF0) >> 4);
load_last_joy_state(zmv_vars.write_buffer);
}
static void flush_input_buffer()
@@ -984,6 +987,69 @@ static size_t zmv_frames_replayed()
/*
Rewind related functions and vars
*/
unsigned char *zmv_rewind_buffer = 0;
static void zmv_alloc_rewind_buffer(unsigned char rewind_states)
{
zmv_rewind_buffer = (unsigned char *)malloc(16*rewind_states);
}
static void zmv_dealloc_rewind_buffer()
{
if (zmv_rewind_buffer)
{
free(zmv_rewind_buffer);
zmv_rewind_buffer = 0;
}
}
void zmv_rewind_save(size_t state, bool playback)
{
unsigned char *state_start_pos = zmv_rewind_buffer + 16*state;
size_t file_pos = ftell(zmv_vars.fp) + zmv_vars.write_buffer_loc;
save_last_joy_state(state_start_pos);
memcpy(state_start_pos+8, &file_pos, 4);
memcpy(state_start_pos+12, playback ? &zmv_open_vars.frames_replayed : &zmv_vars.header.frames, 4);
}
void zmv_rewind_load(size_t state, bool playback)
{
unsigned char *state_start_pos = zmv_rewind_buffer + 16*state;
size_t file_pos = 0;
load_last_joy_state(state_start_pos);
memcpy(&file_pos, state_start_pos+8, 4);
if (playback)
{
memcpy(&zmv_open_vars.frames_replayed, state_start_pos+12, 4);
fseek(zmv_vars.fp, file_pos, SEEK_SET);
}
else
{
size_t frame = 0;
memcpy(&frame, state_start_pos+12, 4);
zmv_vars.header.rerecords++;
zmv_vars.header.removed_frames += zmv_vars.header.frames - frame;
zmv_vars.header.frames = frame;
flush_input_buffer();
fseek(zmv_vars.fp, file_pos, SEEK_SET);
ftruncate(fileno(zmv_vars.fp), file_pos);
zmv_vars.header.internal_chapters = internal_chapter_delete_after(&zmv_vars.internal_chapters, file_pos);
zmv_vars.last_internal_chapter_offset = internal_chapter_lesser(&zmv_vars.internal_chapters, ~0);
}
}
/*
Save and load MZT
*/
@@ -1378,6 +1444,7 @@ void Replay()
MovieProcessing = 0;
zmv_replay_finished();
zmv_dealloc_rewind_buffer();
MovieSub_Close();
SRAMState = PrevSRAMState;
}
@@ -1420,6 +1487,7 @@ void MovieStop()
}
break;
}
zmv_dealloc_rewind_buffer();
MovieProcessing = 0;
}
@@ -1428,6 +1496,7 @@ extern unsigned int nmiprevaddrl, nmiprevaddrh, nmirept, nmiprevline, nmistatus;
extern unsigned char GUIQuit, fnamest[512], CMovieExt, RecData[16], soundon;
extern unsigned char NextLineCache, sramsavedis, UseRemoteSRAMData;
extern unsigned char UnableMovie2[24], UnableMovie3[23];
extern unsigned char RewindStates;
void SRAMChdir();
void loadstate2();
@@ -1451,6 +1520,7 @@ void MoviePlay()
if (zmv_open(fnamest+1))
{
zmv_alloc_rewind_buffer(RewindStates);
MovieProcessing = 1;
memcpy(&fnamest[statefileloc-3], ".sub", 4);
if (isdigit(CMovieExt)) { fnamest[statefileloc] = CMovieExt; }
@@ -1497,6 +1567,7 @@ void MovieRecord()
if (!(tempfhandle = fopen(fnamest+1,"rb")))
{
zmv_create(fnamest+1);
zmv_alloc_rewind_buffer(RewindStates);
MovieProcessing = 2;
Msgptr = "MOVIE RECORDING.";
MessageOn = MsgCount;