void FillBuffer(const ByteArray &inBytes)
{
int time_samples = inBytes.Size()/sizeof(float)/STEREO_SAMPLES;
const float *buffer = (const float *)inBytes.Bytes();
enum { MASK = BUF_SIZE - 1 };
for(int i=0;i<time_samples;i++)
{
int mono_pos = (i+mDynamicFillPos) & MASK;
mDynamicBuffer[ mono_pos<<1 ] = *buffer++ * ((1<<15)-1);
mDynamicBuffer[ (mono_pos<<1) + 1 ] = *buffer++ * ((1<<15)-1);
}
if (mDynamicFillPos<(sSoundPos-mDynamicStartPos))
ELOG("Too slow - FillBuffer %d / %d)", mDynamicFillPos, (sSoundPos-mDynamicStartPos) );
mDynamicFillPos += time_samples;
if (time_samples<1024 && !mDynamicDone)
{
mDynamicDone = true;
for(int i=0;i<2048;i++)
{
int mono_pos = (i+mDynamicFillPos) & MASK;
mDynamicBuffer[ mono_pos<<1 ] = 0;
mDynamicBuffer[ (mono_pos<<1) + 1 ] = 0;
}
int samples_left = (int)mDynamicFillPos - (int)(sSoundPos-mDynamicStartPos);
int ticks_left = samples_left*1000/44100;
//printf("Expire in %d (%d)\n", samples_left, ticks_left );
#ifndef EMSCRIPTEN
Mix_ExpireChannel(mChannel, ticks_left>0 ? ticks_left : 1 );
#endif
}
}
static mrb_value
mrb_sdl2_mixer_expire_channel(mrb_state *mrb, mrb_value self)
{
mrb_int channel, ticks;
mrb_get_args(mrb, "ii", &channel, &ticks);
return mrb_fixnum_value(Mix_ExpireChannel(channel, ticks));
}
static int lua_Mix_ExpireChannel(State & state){
Stack * stack = state.stack;
int channel = -1;
int ms = 0;
if (stack->is<LUA_TNUMBER>(1)){
channel = stack->to<int>(1);
}
if (stack->is<LUA_TNUMBER>(2)){
ms = stack->to<int>(2);
}
stack->push<int>(Mix_ExpireChannel(channel, ms));
return 1;
}
/* Change the expiration delay for a channel */
int Mix_ExpireChannel(int which, int ticks)
{
int status = 0;
if ( which == -1 ) {
int i;
for ( i=0; i < num_channels; ++ i ) {
status += Mix_ExpireChannel(i, ticks);
}
} else if ( which < num_channels ) {
SDL_LockAudio();
mix_channel[which].expire = (ticks>0) ? (SDL_GetTicks() + ticks) : 0;
SDL_UnlockAudio();
++ status;
}
return(status);
}
void Sound::expire(uint16 ticks) {
Mix_ExpireChannel(_channel, ticks);
}
void play_sound_internal(const std::string& files, channel_group group, unsigned int repeats,
unsigned int distance, int id, int loop_ticks, int fadein_ticks)
{
if(files.empty() || distance >= DISTANCE_SILENT || !mix_ok) {
return;
}
audio_lock lock;
// find a free channel in the desired group
int channel = Mix_GroupAvailable(group);
if(channel == -1) {
LOG_AUDIO << "All channels dedicated to sound group(" << group << ") are busy, skipping.\n";
return;
}
Mix_Chunk *chunk;
std::string file = pick_one(files);
try {
chunk = load_chunk(file, group);
assert(chunk);
} catch(const chunk_load_exception&) {
return;
}
/*
* This check prevents SDL_Mixer from blowing up on Windows when UI sound is played
* in response to toggling the checkbox which disables sound.
*/
if(group != SOUND_UI) {
Mix_SetDistance(channel, distance);
}
int res;
if(loop_ticks > 0) {
if(fadein_ticks > 0) {
res = Mix_FadeInChannelTimed(channel, chunk, -1, fadein_ticks, loop_ticks);
} else {
res = Mix_PlayChannel(channel, chunk, -1);
}
if(res >= 0) {
Mix_ExpireChannel(channel, loop_ticks);
}
} else {
if(fadein_ticks > 0) {
res = Mix_FadeInChannel(channel, chunk, repeats, fadein_ticks);
} else {
res = Mix_PlayChannel(channel, chunk, repeats);
}
}
if(res < 0) {
ERR_AUDIO << "error playing sound effect: " << Mix_GetError() << std::endl;
//still keep it in the sound cache, in case we want to try again later
return;
}
channel_ids[channel] = id;
//reserve the channel's chunk from being freed, since it is playing
channel_chunks[res] = chunk;
}
void SDLStopAudio(int channel, unsigned int time)
{
Mix_ExpireChannel(channel, time);
}
//expire
bool CChannel::Expire(int ms)
{
//expire the channel
return(Mix_ExpireChannel(m_Channel,ms)!=0);
}
