//
// Starting a sound means adding it
// to the current list of active sounds
// in the internal channels.
// As the SFX info struct contains
// e.g. a pointer to the raw data,
// it is ignored.
// As our sound handling does not handle
// priority, it is ignored.
// Pitching (that is, increased speed of playback)
// is set, but currently not used by mixing.
//
static int I_SDL_StartSound(int id, int channel, int vol, int sep)
{
Mix_Chunk *chunk;
if (!sound_initialized)
return -1;
// Release a sound effect if there is already one playing
// on this channel
ReleaseSoundOnChannel(channel);
// Get the sound data
chunk = GetSFXChunk(id);
if (chunk == NULL)
return -1;
// play sound
Mix_PlayChannel(channel, chunk, 0);
channels_playing[channel] = id;
// set separation, etc.
I_SDL_UpdateSoundParams(channel, vol, sep);
return channel;
}
static int I_SDL_StartSound(sfxinfo_t *sfxinfo, int channel, int vol, int sep)
{
allocated_sound_t *snd;
if (!sound_initialized || channel < 0 || channel >= NUM_CHANNELS)
{
return -1;
}
// Release a sound effect if there is already one playing
// on this channel
ReleaseSoundOnChannel(channel);
// Get the sound data
if (!LockSound(sfxinfo))
{
return -1;
}
snd = sfxinfo->driver_data;
// play sound
Mix_PlayChannelTimed(channel, &snd->chunk, 0, -1);
channels_playing[channel] = sfxinfo;
// set separation, etc.
I_SDL_UpdateSoundParams(channel, vol, sep);
return channel;
}
static void I_SDL_StopSound(int handle)
{
if (!sound_initialized)
return;
Mix_HaltChannel(handle);
// Sound data is no longer needed; release the
// sound data being used for this channel
ReleaseSoundOnChannel(handle);
}
//
// Periodically called to update the sound system
//
void I_SDL_UpdateSound(void)
{
int i;
// Check all channels to see if a sound has finished
for (i = 0; i < NUM_CHANNELS; ++i)
if (channels_playing[i] && !I_SDL_SoundIsPlaying(i))
// Sound has finished playing on this channel,
// but sound data has not been released to cache
ReleaseSoundOnChannel(i);
}
static void I_SDL_StopSound(int handle)
{
if (!sound_initialized || handle < 0 || handle >= NUM_CHANNELS)
{
return;
}
// Sound data is no longer needed; release the
// sound data being used for this channel
ReleaseSoundOnChannel(handle);
}
//
// Starting a sound means adding it
// to the current list of active sounds
// in the internal channels.
// As the SFX info struct contains
// e.g. a pointer to the raw data,
// it is ignored.
// As our sound handling does not handle
// priority, it is ignored.
// Pitching (that is, increased speed of playback)
// is set, but currently not used by mixing.
//
int I_SDL_StartSound(sfxinfo_t *sfxinfo, int channel, int vol, int sep, int pitch)
{
allocated_sound_t *snd;
if (!sound_initialized || channel < 0 || channel >= NUM_CHANNELS)
return -1;
// Release a sound effect if there is already one playing
// on this channel
ReleaseSoundOnChannel(channel);
// Get the sound data
if (!LockSound(sfxinfo))
return -1;
snd = GetAllocatedSoundBySfxInfoAndPitch(sfxinfo, pitch);
if (!snd)
{
allocated_sound_t *newsnd;
// fetch the base sound effect, un-pitch-shifted
snd = GetAllocatedSoundBySfxInfoAndPitch(sfxinfo, NORM_PITCH);
if (!snd)
return -1;
if (s_randompitch)
{
newsnd = PitchShift(snd, pitch);
if (newsnd)
{
LockAllocatedSound(newsnd);
UnlockAllocatedSound(snd);
snd = newsnd;
}
}
}
else
LockAllocatedSound(snd);
// play sound
Mix_PlayChannel(channel, &snd->chunk, 0);
channels_playing[channel] = snd;
// set separation, etc.
I_SDL_UpdateSoundParams(channel, vol, sep);
return channel;
}
