void al_duh_set_loop(AL_DUH_PLAYER *dp, int loop) {
DUH_SIGRENDERER *sr = al_duh_get_sigrenderer(dp);
DUMB_IT_SIGRENDERER *itsr = duh_get_it_sigrenderer(sr);
if (itsr == NULL)
return;
if (loop)
dumb_it_set_loop_callback(itsr, NULL, NULL);
else
dumb_it_set_loop_callback(itsr, dumb_it_callback_terminate, itsr);
}
int get_pos()
{
if ((duhPlayer == NULL) || (done))
return -1;
// determine the current track number (DUMB calls them 'orders')
DUH_SIGRENDERER *sr = al_duh_get_sigrenderer(duhPlayer);
DUMB_IT_SIGRENDERER *itsr = duh_get_it_sigrenderer(sr);
if (itsr == NULL)
return -1;
return dumb_it_sr_get_current_order(itsr);
}
int main(int argc, const char *const *argv) /* I'm const-crazy! */
{
DUH *duh; /* Encapsulates the music file. */
AL_DUH_PLAYER *dp; /* Holds the current playback state. */
/* Initialise Allegro */
if (allegro_init())
return EXIT_FAILURE;
/* Check that we have one argument (plus the executable name). */
if (argc != 2)
usage(argv[0]);
/* Tell Allegro where to find configuration data. This means you can
* put any settings for Allegro in dumb.ini. See Allegro's
* documentation for more information.
*/
set_config_file("dumb.ini");
/* Initialise Allegro's keyboard input. */
if (install_keyboard()) {
allegro_message("Failed to initialise keyboard driver!\n");
return EXIT_FAILURE;
}
/* This function call is appropriate for a program that will play one
* sample or one audio stream at a time. If you have sound effects
* too, you may want to increase the parameter. See Allegro's
* documentation for details on what the parameter means. Note that
* newer versions of Allegro act as if set_volume_per_voice() was
* called with parameter 1 initially, while older versions behave as
* if -1 was passed, so you should call the function if you want
* consistent behaviour.
*/
set_volume_per_voice(0);
/* Initialise Allegro's sound output system. */
if (install_sound(DIGI_AUTODETECT, MIDI_NONE, NULL)) {
allegro_message("Failed to initialise sound driver!\n%s\n", allegro_error);
return EXIT_FAILURE;
}
/* dumb_exit() is a function defined by DUMB. This operation arranges
* for dumb_exit() to be called last thing before the program exits.
* dumb_exit() does a bit of cleaning up for you. atexit() is
* declared in stdlib.h.
*/
atexit(&dumb_exit);
/* DUMB defines its own wrappers for file input. There is a struct
* called DUMBFILE that holds function pointers for the various file
* operations needed by DUMB. You can decide whether to use stdio
* FILE objects, Allegro's PACKFILEs or something else entirely. No
* wrapper is installed initially, so you must call this or
* dumb_register_stdfiles() or set up your own before trying to load
* modules by file name. (If you are using another method, such as
* loading an Allegro datafile with modules embedded in it, then DUMB
* never opens a file by file name so this doesn't apply.)
*/
dumb_register_packfiles();
/* Load the module file into a DUH object. Quick and dirty: try the
* loader for each format until one succeeds. Note that 15-sample
* mods have no identifying features, so dumb_load_mod() may succeed
* on files that aren't mods at all. We therefore try that one last.
*/
duh = dumb_load_it(argv[1]);
if (!duh) {
duh = dumb_load_xm(argv[1]);
if (!duh) {
duh = dumb_load_s3m(argv[1]);
if (!duh) {
duh = dumb_load_mod(argv[1]);
if (!duh) {
allegro_message("Failed to load %s!\n", argv[1]);
return EXIT_FAILURE;
}
}
}
}
/* Read the quality values from the config file we told Allegro to
* use. You may want to hardcode these or provide a more elaborate
* interface via which the user can control them.
*/
dumb_resampling_quality = get_config_int("sound", "dumb_resampling_quality", 4);
dumb_it_max_to_mix = get_config_int("sound", "dumb_it_max_to_mix", 128);
/* If we're not in DOS, show a window and register our close hook
* function.
*/
# ifndef ALLEGRO_DOS
{
const char *fn = get_filename(argv[1]);
gfx_half_width = strlen(fn);
if (gfx_half_width < 22) gfx_half_width = 22;
gfx_half_width = (gfx_half_width + 2) * 4;
/* set_window_title() is not const-correct (yet). */
set_window_title((char *)"DUMB Music Player");
if (set_gfx_mode(GFX_DUMB_MODE, gfx_half_width*2, 80, 0, 0) == 0) {
acquire_screen();
textout_centre(screen, font, fn, gfx_half_width, 20, 14);
textout_centre(screen, font, "Press any key to exit.", gfx_half_width, 52, 11);
release_screen();
} else
gfx_half_width = 0;
}
/* Silly check to get around the fact that someone stupidly removed
* an old function from Allegro instead of deprecating it. The old
* function was put back a version later, but we may as well use the
* new one if it's there!
*/
# if ALLEGRO_VERSION*10000 + ALLEGRO_SUB_VERSION*100 + ALLEGRO_WIP_VERSION >= 40105
set_close_button_callback(&closehook);
# else
set_window_close_hook(&closehook);
# endif
# endif
/* We want to continue running if the user switches to another
* application.
*/
set_display_switch_mode(SWITCH_BACKGROUND);
/* We have the music loaded, but it isn't playing yet. This starts it
* playing. We construct a second object, the AL_DUH_PLAYER, to
* represent the playing music. This means you can play the music
* twice at the same time should you want to!
*
* Specify the number of channels (2 for stereo), which 'signal' to
* play (always 0 for modules), the volume (1.0f for default), the
* buffer size (4096 generally works well) and the sampling frequency
* (ideally match the final output frequency Allegro is using). An
* Allegro audio stream will be started.
*/
dp = al_start_duh(duh, 2, 0, 1.0f,
get_config_int("sound", "buffer_size", 4096),
get_config_int("sound", "sound_freq", 44100));
/* Register our callback functions so that they are called when the
* music loops or stops. See docs/howto.txt for more information.
* There is no threading issue: DUMB will only process playback
* in al_poll_duh(), which we call below.
*/
{
DUH_SIGRENDERER *sr = al_duh_get_sigrenderer(dp);
DUMB_IT_SIGRENDERER *itsr = duh_get_it_sigrenderer(sr);
dumb_it_set_loop_callback(itsr, &loop_callback, NULL);
dumb_it_set_xm_speed_zero_callback(itsr, &xm_speed_zero_callback, NULL);
}
/* Main loop. */
for (;;) {
/* Check for keys in the buffer. If we get one, discard it
* and exit the main loop.
*/
if (keypressed()) {
readkey();
break;
}
/* Poll the music. We exit the loop if al_poll_duh() has
* returned nonzero (music finished) or the window has been
* closed. al_poll_duh() might return nonzero if you have set
* up a callback that tells the music to stop.
*/
if (al_poll_duh(dp) || closed)
break;
/* Give other threads a look-in, or allow the processor to
* sleep for a bit. YIELD() is defined further up in this
* file.
*/
YIELD();
}
/* Remove the audio stream and deallocate the memory being used for
* the playback state. We set dp to NULL to emphasise that the object
* has gone.
*/
al_stop_duh(dp);
dp = NULL;
/* Free the DUH object containing the actual music data. */
unload_duh(duh);
duh = NULL;
/* All done! */
return EXIT_SUCCESS;
}
/* DEPRECATED */
DUH_SIGRENDERER *al_duh_get_renderer(AL_DUH_PLAYER *dp)
{
return al_duh_get_sigrenderer(dp);
}
