void try_sample_backwards(int sample_index, int x, int y, int volume, int priority, int freq)
{
if (!snd_data)
return;
SAMPLE *s = (SAMPLE *)(snd_data[sample_index].dat);
int voice = allocate_voice(s);
if (!playfield->visible(x,y))
{
volume /= 2;
priority /= 2;
}
if (voice >=0)
{
voice_set_volume(voice,volume);
voice_set_priority(voice,priority);
voice_set_frequency(voice, voice_get_frequency(voice) * freq / 1000);
voice_set_playmode(voice, PLAYMODE_BACKWARD);
voice_start(voice);
release_voice(voice);
}
}
void try_loop(short *voice, int sample_index, int x, int y, int volume, int priority, int freq)
{
if (!snd_data)
return;
SAMPLE *s = (SAMPLE *)(snd_data[sample_index].dat);
if (*voice <0)
{
*voice = allocate_voice(s);
if (*voice >= 0)
{
voice_start(*voice);
voice_set_frequency(*voice, voice_get_frequency(*voice) * freq / 1000);
}
}
if (playfield && !playfield->visible(x,y))
{
volume /= 2;
priority /= 2;
}
if (*voice >=0)
{
voice_set_volume(*voice,volume);
voice_set_priority(*voice,priority);
voice_set_playmode(*voice, PLAYMODE_LOOP);
}
}
void _apeg_audio_set_speed_multiple(APEG_LAYER *layer, float multiple)
{
if(layer->audio.stream)
{
int newfreq = (float)layer->stream.audio.freq * multiple;
int voice = layer->audio.voice;
if(newfreq > 0)
{
voice_set_frequency(voice, newfreq);
voice_start(voice);
}
else
voice_stop(voice);
}
}
