#include <config.h>
+#include <assert.h>
-#include "stream_sound_source.h"
-#include "sound_manager.h"
-#include "sound_file.h"
+#include <SDL.h>
-StreamSoundSource::StreamSoundSource(SoundFile* file)
+#include "stream_sound_source.hpp"
+#include "sound_manager.hpp"
+#include "sound_file.hpp"
+#include "msg.hpp"
+
+StreamSoundSource::StreamSoundSource()
+ : file(0), fade_state(NoFading), looping(false)
{
- this->file = file;
alGenBuffers(STREAMFRAGMENTS, buffers);
SoundManager::check_al_error("Couldn't allocate audio buffers: ");
- format = SoundManager::get_sample_format(file);
- try {
- for(size_t i = 0; i < STREAMFRAGMENTS; ++i) {
- fillBufferAndQueue(buffers[i]);
- }
- } catch(...) {
- alDeleteBuffers(STREAMFRAGMENTS, buffers);
- }
}
StreamSoundSource::~StreamSoundSource()
{
+ delete file;
alDeleteBuffers(STREAMFRAGMENTS, buffers);
SoundManager::check_al_error("Couldn't delete audio buffers: ");
}
void
-StreamSoundSource::update()
+StreamSoundSource::set_sound_file(SoundFile* newfile)
{
- if(!playing())
- return;
+ delete file;
+ file = newfile;
+ ALint queued;
+ alGetSourcei(source, AL_BUFFERS_QUEUED, &queued);
+ for(size_t i = 0; i < STREAMFRAGMENTS - queued; ++i) {
+ if(fillBufferAndQueue(buffers[i]) == false)
+ break;
+ }
+}
+
+void
+StreamSoundSource::update()
+{
ALint processed = 0;
alGetSourcei(source, AL_BUFFERS_PROCESSED, &processed);
- while(processed > 0) {
- processed--;
-
+ for(ALint i = 0; i < processed; ++i) {
ALuint buffer;
alSourceUnqueueBuffers(source, 1, &buffer);
SoundManager::check_al_error("Couldn't unqueu audio buffer: ");
- fillBufferAndQueue(buffer);
+ if(fillBufferAndQueue(buffer) == false)
+ break;
}
-
- // we might have to restart the source if we had a buffer underrun
+
if(!playing()) {
- std::cerr << "Restarting audio source because of buffer underrun.\n";
- alSourcePlay(source);
- SoundManager::check_al_error("Couldn't restart audio source: ");
+ if(processed == 0 || !looping)
+ return;
+
+ // we might have to restart the source if we had a buffer underrun
+ msg_info("Restarting audio source because of buffer underrun");
+ play();
}
- // TODO handle fading
+ if(fade_state == FadingOn) {
+ Uint32 ticks = SDL_GetTicks();
+ float time = (ticks - fade_start_ticks) / 1000.0;
+ if(time >= fade_time) {
+ set_gain(1.0);
+ fade_state = NoFading;
+ } else {
+ set_gain(time / fade_time);
+ }
+ } else if(fade_state == FadingOff) {
+ Uint32 ticks = SDL_GetTicks();
+ float time = (ticks - fade_start_ticks) / 1000.0;
+ if(time >= fade_time) {
+ stop();
+ fade_state = NoFading;
+ } else {
+ set_gain( (fade_time-time) / fade_time);
+ }
+ }
}
void
+StreamSoundSource::set_fading(FadeState state, float fade_time)
+{
+ this->fade_state = state;
+ this->fade_time = fade_time;
+ this->fade_start_ticks = SDL_GetTicks();
+}
+
+bool
StreamSoundSource::fillBufferAndQueue(ALuint buffer)
{
// fill buffer
do {
bytesread += file->read(bufferdata + bytesread,
STREAMFRAGMENTSIZE - bytesread);
+ // end of sound file
if(bytesread < STREAMFRAGMENTSIZE) {
- file->reset();
+ if(looping)
+ file->reset();
+ else
+ break;
}
} while(bytesread < STREAMFRAGMENTSIZE);
-
- alBufferData(buffer, format, bufferdata, STREAMFRAGMENTSIZE, file->rate);
- delete[] bufferdata;
- SoundManager::check_al_error("Couldn't refill audio buffer: ");
- alSourceQueueBuffers(source, 1, &buffer);
- SoundManager::check_al_error("Couldn't queue audio buffer: ");
+ if(bytesread > 0) {
+ ALenum format = SoundManager::get_sample_format(file);
+ alBufferData(buffer, format, bufferdata, bytesread, file->rate);
+ delete[] bufferdata;
+ SoundManager::check_al_error("Couldn't refill audio buffer: ");
+
+ alSourceQueueBuffers(source, 1, &buffer);
+ SoundManager::check_al_error("Couldn't queue audio buffer: ");
+ }
+
+ // return false if there aren't more buffers to fill
+ return bytesread >= STREAMFRAGMENTSIZE;
}
+