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-rw-r--r--opl/examples/.gitignore5
-rw-r--r--opl/examples/droplay.c94
2 files changed, 77 insertions, 22 deletions
diff --git a/opl/examples/.gitignore b/opl/examples/.gitignore
new file mode 100644
index 00000000..49bb1af8
--- /dev/null
+++ b/opl/examples/.gitignore
@@ -0,0 +1,5 @@
+Makefile.in
+Makefile
+.deps
+droplay
+
diff --git a/opl/examples/droplay.c b/opl/examples/droplay.c
index 5f09fe11..89cf6862 100644
--- a/opl/examples/droplay.c
+++ b/opl/examples/droplay.c
@@ -116,44 +116,51 @@ void Shutdown(void)
OPL_Shutdown();
}
-void PlayFile(char *filename)
+struct timer_data
{
- FILE *stream;
- char buf[8];
-
- stream = fopen(filename, "rb");
+ int running;
+ FILE *fstream;
+};
- if (fread(buf, 1, 8, stream) < 8)
- {
- fprintf(stderr, "failed to read raw OPL header\n");
- exit(-1);
- }
+void TimerCallback(void *data)
+{
+ struct timer_data *timer_data = data;
+ int delay;
- if (strncmp(buf, HEADER_STRING, 8) != 0)
+ if (!timer_data->running)
{
- fprintf(stderr, "Raw OPL header not found\n");
- exit(-1);
+ return;
}
- fseek(stream, 28, SEEK_SET);
+ // Read data until we must make a delay.
- while (!feof(stream))
+ for (;;)
{
int reg, val;
- reg = fgetc(stream);
- val = fgetc(stream);
+ // End of file?
- // Delay?
+ if (feof(timer_data->fstream))
+ {
+ timer_data->running = 0;
+ return;
+ }
+
+ reg = fgetc(timer_data->fstream);
+ val = fgetc(timer_data->fstream);
+
+ // Register value of 0 or 1 indicates a delay.
if (reg == 0x00)
{
- SDL_Delay(val);
+ delay = val;
+ break;
}
else if (reg == 0x01)
{
- val |= (fgetc(stream) << 8);
- SDL_Delay(val);
+ val |= (fgetc(timer_data->fstream) << 8);
+ delay = val;
+ break;
}
else
{
@@ -161,7 +168,50 @@ void PlayFile(char *filename)
}
}
- fclose(stream);
+ // Schedule the next timer callback.
+
+ OPL_SetCallback(delay, TimerCallback, timer_data);
+}
+
+void PlayFile(char *filename)
+{
+ struct timer_data timer_data;
+ int running;
+ char buf[8];
+
+ timer_data.fstream = fopen(filename, "rb");
+
+ if (fread(buf, 1, 8, timer_data.fstream) < 8)
+ {
+ fprintf(stderr, "failed to read raw OPL header\n");
+ exit(-1);
+ }
+
+ if (strncmp(buf, HEADER_STRING, 8) != 0)
+ {
+ fprintf(stderr, "Raw OPL header not found\n");
+ exit(-1);
+ }
+
+ fseek(timer_data.fstream, 28, SEEK_SET);
+ timer_data.running = 1;
+
+ // Start callback loop sequence.
+
+ OPL_SetCallback(0, TimerCallback, &timer_data);
+
+ // Sleep until the playback finishes.
+
+ do
+ {
+ OPL_Lock();
+ running = timer_data.running;
+ OPL_Unlock();
+
+ SDL_Delay(100);
+ } while (running);
+
+ fclose(timer_data.fstream);
}
int main(int argc, char *argv[])