//-----------------------------------------------------------------------------
static void timer_set_period(uint16_t i)
{
TC0->COUNT16.CC[0].reg = (F_CPU / 1000ul / 256) * i;
timer_sync();
TC0->COUNT16.COUNT.reg = 0;
timer_sync();
}
static size_t
httpd_output_play(void *data, const void *chunk, size_t size, GError **error)
{
struct httpd_output *httpd = data;
bool has_clients;
g_mutex_lock(httpd->mutex);
has_clients = httpd->clients != NULL;
g_mutex_unlock(httpd->mutex);
if (has_clients) {
bool success;
success = httpd_output_encode_and_play(httpd, chunk, size,
error);
if (!success)
return 0;
}
if (!httpd->timer->started)
timer_start(httpd->timer);
else
timer_sync(httpd->timer);
timer_add(httpd->timer, size);
return size;
}
//-----------------------------------------------------------------------------
static void timer_init(void)
{
PM->APBCMASK.reg |= PM_APBCMASK_TC0;
GCLK->CLKCTRL.reg = GCLK_CLKCTRL_ID(TC0_GCLK_ID) |
GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN(0);
TC0->COUNT16.CTRLA.reg = TC_CTRLA_MODE_COUNT16 | TC_CTRLA_WAVEGEN_MFRQ |
TC_CTRLA_PRESCALER_DIV256 | TC_CTRLA_PRESCSYNC_RESYNC;
timer_sync();
TC0->COUNT16.COUNT.reg = 0;
timer_sync();
timer_set_period(PERIOD_SLOW);
TC0->COUNT16.CTRLA.reg |= TC_CTRLA_ENABLE;
timer_sync();
TC0->COUNT16.INTENSET.reg = TC_INTENSET_MC(1);
NVIC_EnableIRQ(TC0_IRQn);
}
static size_t
openal_play(void *data, const void *chunk, size_t size,
G_GNUC_UNUSED GError **error)
{
struct openal_data *od = data;
ALuint buffer;
ALint num, state;
if (alcGetCurrentContext() != od->context) {
alcMakeContextCurrent(od->context);
}
alGetSourcei(od->source, AL_BUFFERS_PROCESSED, &num);
if (od->filled < NUM_BUFFERS) {
/* fill all buffers */
buffer = od->buffers[od->filled];
od->filled++;
} else {
/* wait for processed buffer */
while (num < 1) {
if (!od->timer->started) {
timer_start(od->timer);
} else {
timer_sync(od->timer);
}
timer_add(od->timer, size);
alGetSourcei(od->source, AL_BUFFERS_PROCESSED, &num);
}
alSourceUnqueueBuffers(od->source, 1, &buffer);
}
alBufferData(buffer, od->format, chunk, size, od->frequency);
alSourceQueueBuffers(od->source, 1, &buffer);
alGetSourcei(od->source, AL_SOURCE_STATE, &state);
if (state != AL_PLAYING) {
alSourcePlay(od->source);
}
return size;
}
static size_t
fifo_output_play(void *data, const void *chunk, size_t size,
GError **error)
{
struct fifo_data *fd = (struct fifo_data *)data;
ssize_t bytes;
if (!fd->timer->started)
timer_start(fd->timer);
else
timer_sync(fd->timer);
timer_add(fd->timer, size);
while (true) {
bytes = write(fd->output, chunk, size);
if (bytes > 0)
return (size_t)bytes;
if (bytes < 0) {
switch (errno) {
case EAGAIN:
/* The pipe is full, so empty it */
fifo_output_cancel(fd);
continue;
case EINTR:
continue;
}
g_set_error(error, fifo_output_quark(), errno,
"Failed to write to FIFO %s: %s",
fd->path, g_strerror(errno));
return 0;
}
}
}
static void
fluidsynth_file_decode(struct decoder *decoder, const char *path_fs)
{
static const struct audio_format audio_format = {
.sample_rate = 48000,
.bits = 16,
.channels = 2,
};
char setting_sample_rate[] = "synth.sample-rate";
/*
char setting_verbose[] = "synth.verbose";
char setting_yes[] = "yes";
*/
const char *soundfont_path;
fluid_settings_t *settings;
fluid_synth_t *synth;
fluid_player_t *player;
char *path_dup;
int ret;
Timer *timer;
enum decoder_command cmd;
soundfont_path =
config_get_string("soundfont",
"/usr/share/sounds/sf2/FluidR3_GM.sf2");
/* set up fluid settings */
settings = new_fluid_settings();
if (settings == NULL)
return;
fluid_settings_setnum(settings, setting_sample_rate, 48000);
/*
fluid_settings_setstr(settings, setting_verbose, setting_yes);
*/
/* create the fluid synth */
synth = new_fluid_synth(settings);
if (synth == NULL) {
delete_fluid_settings(settings);
return;
}
ret = fluid_synth_sfload(synth, soundfont_path, true);
if (ret < 0) {
g_warning("fluid_synth_sfload() failed");
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* create the fluid player */
player = new_fluid_player(synth);
if (player == NULL) {
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* temporarily duplicate the path_fs string, because
fluidsynth wants a writable string */
path_dup = g_strdup(path_fs);
ret = fluid_player_add(player, path_dup);
g_free(path_dup);
if (ret != 0) {
g_warning("fluid_player_add() failed");
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* start the player */
ret = fluid_player_play(player);
if (ret != 0) {
g_warning("fluid_player_play() failed");
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
return;
}
/* set up a timer for synchronization; fluidsynth always
decodes in real time, which forces us to synchronize */
/* XXX is there any way to switch off real-time decoding? */
timer = timer_new(&audio_format);
timer_start(timer);
/* initialization complete - announce the audio format to the
MPD core */
decoder_initialized(decoder, &audio_format, false, -1);
do {
int16_t buffer[2048];
const unsigned max_frames = G_N_ELEMENTS(buffer) / 2;
/* synchronize with the fluid player */
timer_add(timer, sizeof(buffer));
timer_sync(timer);
/* read samples from fluidsynth and send them to the
MPD core */
ret = fluid_synth_write_s16(synth, max_frames,
buffer, 0, 2,
buffer, 1, 2);
/* XXX how do we see whether the player is done? We
can't access the private attribute
player->status */
if (ret != 0)
break;
cmd = decoder_data(decoder, NULL, buffer, sizeof(buffer),
0, 0, NULL);
} while (cmd == DECODE_COMMAND_NONE);
/* clean up */
timer_free(timer);
fluid_player_stop(player);
fluid_player_join(player);
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
}
static struct tag *
fluidsynth_tag_dup(const char *file)
{
struct tag *tag = tag_new();
/* to be implemented */
(void)file;
return tag;
}
static const char *const fluidsynth_suffixes[] = {
"mid",
NULL
};
const struct decoder_plugin fluidsynth_decoder_plugin = {
.name = "fluidsynth",
.init = fluidsynth_init,
.file_decode = fluidsynth_file_decode,
.tag_dup = fluidsynth_tag_dup,
.suffixes = fluidsynth_suffixes,
};
void game_step(Game* game) {
cpSpaceStep(game->scene->space, game->timer->dt);
timer_sync(game->timer);
}