mirrors/raylib
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

setting up openal

Browse Source
This commit is contained in:
Joshua Reisenauer 2016-04-25 20:05:03 -07:00
parent f12754b01f
commit 04d9deac92
1 changed files with 31 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
src/audio.c
View File

@ -85,6 +85,7 @@ typedef struct Music {
int channels;
int sampleRate;
int totalSamplesLeft;
float totalLengthSeconds;
bool loop;
bool chipTune; // True if chiptune is loaded
} Music;
@ -575,13 +576,26 @@ void PlayMusicStream(char *fileName)
currentMusic.sampleRate = 48000;
currentMusic.loop = true;
// only stereo/float is supported for xm
// only stereo is supported for xm
if(!jar_xm_create_context_from_file(&currentMusic.chipctx, currentMusic.sampleRate, fileName))
{
currentMusic.format = AL_FORMAT_STEREO16; // AL_FORMAT_STEREO_FLOAT32;
jar_xm_set_max_loop_count(currentMusic.chipctx, 0); // infinite number of loops
currentMusic.totalSamplesLeft = jar_xm_get_remaining_samples(currentMusic.chipctx);
currentMusic.totalLengthSeconds = currentMusic.totalSamplesLeft / (currentMusic.sampleRate * currentMusic.channels);
musicEnabled = true;
// Set up OpenAL
alGenSources(1, &currentMusic.source);
alSourcef(currentMusic.source, AL_PITCH, 1);
alSourcef(currentMusic.source, AL_GAIN, 1);
alSource3f(currentMusic.source, AL_POSITION, 0, 0, 0);
alSource3f(currentMusic.source, AL_VELOCITY, 0, 0, 0);
alGenBuffers(2, currentMusic.buffers);
BufferMusicStream(currentMusic.buffers[0]);
BufferMusicStream(currentMusic.buffers[1]);
alSourceQueueBuffers(currentMusic.source, 2, currentMusic.buffers);
alSourcePlay(currentMusic.source);
}
}
else TraceLog(WARNING, "[%s] Music extension not recognized, it can't be loaded", fileName);
@ -661,7 +675,7 @@ float GetMusicTimeLength(void)
float totalSeconds;
if (currentMusic.chipTune)
{
//totalSeconds = (float)samples; // Need to figure out how toget this
totalSeconds = currentMusic.totalLengthSeconds; // Not sure if this is the correct value
}
else
{
@ -678,8 +692,8 @@ float GetMusicTimePlayed(void)
if (currentMusic.chipTune)
{
uint64_t samples;
jar_xm_get_position(currentMusic.chipctx, NULL, NULL, NULL, &samples); // Unsure if this is the desired value
secondsPlayed = (float)samples / (currentMusic.sampleRate * currentMusic.channels);
jar_xm_get_position(currentMusic.chipctx, NULL, NULL, NULL, &samples);
secondsPlayed = (float)samples / (currentMusic.sampleRate * currentMusic.channels); // Not sure if this is the correct value
}
else
{
@ -710,10 +724,11 @@ static bool BufferMusicStream(ALuint buffer)
{
while (size < MUSIC_BUFFER_SIZE)
{
if (currentMusic.chipTune)
if (currentMusic.chipTune) // There is no end of stream for xmfiles, once the end is reached zeros are generated for non looped chiptunes.
{
jar_xm_generate_samples_16bit(currentMusic.chipctx, pcm + size, (MUSIC_BUFFER_SIZE - size) / 2);
streamedBytes = (MUSIC_BUFFER_SIZE - size) * 2; // There is no end of stream for xmfiles, once the end is reached zeros are generated for non looped chiptunes.
int readlen = (MUSIC_BUFFER_SIZE - size) / 2;
jar_xm_generate_samples_16bit(currentMusic.chipctx, pcm + size, readlen); // reads 2*readlen shorts and moves them to buffer+size memory location
streamedBytes = readlen * 4; // Not sure if this is what it needs
}
else
{
@ -781,9 +796,15 @@ void UpdateMusicStream(void)
// If no more data to stream, restart music (if loop)
if ((!active) && (currentMusic.loop))
{
stb_vorbis_seek_start(currentMusic.stream);
currentMusic.totalSamplesLeft = stb_vorbis_stream_length_in_samples(currentMusic.stream)*currentMusic.channels;
if(currentMusic.chipTune)
{
currentMusic.totalSamplesLeft = jar_xm_get_remaining_samples(currentMusic.chipctx);
}
else
{
stb_vorbis_seek_start(currentMusic.stream);
currentMusic.totalSamplesLeft = stb_vorbis_stream_length_in_samples(currentMusic.stream)*currentMusic.channels;
}
active = BufferMusicStream(buffer);
}