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adding multiple music streams

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This commit is contained in:
Joshua Reisenauer 2016-05-11 00:37:10 -07:00
parent 9799856ad4
commit 6db44500b7
3 changed files with 91 additions and 108 deletions
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181
src/audio.c
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@ -61,6 +61,7 @@
//----------------------------------------------------------------------------------
#define MAX_STREAM_BUFFERS 2
#define MAX_AUDIO_CONTEXTS 4 // Number of open AL sources
#define MAX_MUSIC_STREAMS 2
#if defined(PLATFORM_RPI) || defined(PLATFORM_ANDROID)
// NOTE: On RPI and Android should be lower to avoid frame-stalls
@ -81,13 +82,8 @@
typedef struct Music {
stb_vorbis *stream;
jar_xm_context_t *chipctx; // Stores jar_xm context
ALuint buffers[MAX_STREAM_BUFFERS];
ALuint source;
ALenum format;
int channels;
int sampleRate;
AudioContext_t *ctx; // audio context
int totalSamplesLeft;
float totalLengthSeconds;
bool loop;
@ -117,8 +113,8 @@ typedef enum { INFO = 0, ERROR, WARNING, DEBUG, OTHER } TraceLogType;
//----------------------------------------------------------------------------------
static AudioContext_t* mixChannelsActive_g[MAX_AUDIO_CONTEXTS]; // What mix channels are currently active
static bool musicEnabled = false;
static Music currentMusic; // Current music loaded
// NOTE: Only one music file playing at a time
static Music currentMusic[2]; // Current music loaded, up to two can play at the same time
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
@ -769,151 +765,129 @@ void SetSoundPitch(Sound sound, float pitch)
// Start music playing (open stream)
void PlayMusicStream(char *fileName)
{
int musicIndex;
int mixIndex;
for(musicIndex = 0; musicIndex < MAX_MUSIC_STREAMS; musicIndex++) // find empty music slot
{
if(currentMusic[musicIndex].stream == NULL && !currentMusic[musicIndex].chipTune) break;
else if(musicIndex = MAX_MUSIC_STREAMS - 1) return;
}
for(mixIndex = 0; mixIndex < MAX_AUDIO_CONTEXTS; mixIndex++) // find empty mix channel slot
{
if(mixChannelsActive_g[mixIndex] == NULL) break;
else if(musicIndex = MAX_AUDIO_CONTEXTS - 1) return;
}
if (strcmp(GetExtension(fileName),"ogg") == 0)
{
// Stop current music, clean buffers, unload current stream
StopMusicStream();
// Open audio stream
currentMusic.stream = stb_vorbis_open_filename(fileName, NULL, NULL);
currentMusic[musicIndex].stream = stb_vorbis_open_filename(fileName, NULL, NULL);
if (currentMusic.stream == NULL)
if (currentMusic[musicIndex].stream == NULL)
{
TraceLog(WARNING, "[%s] OGG audio file could not be opened", fileName);
}
else
{
// Get file info
stb_vorbis_info info = stb_vorbis_get_info(currentMusic.stream);
currentMusic.channels = info.channels;
currentMusic.sampleRate = info.sample_rate;
stb_vorbis_info info = stb_vorbis_get_info(currentMusic[musicIndex].stream);
TraceLog(INFO, "[%s] Ogg sample rate: %i", fileName, info.sample_rate);
TraceLog(INFO, "[%s] Ogg channels: %i", fileName, info.channels);
TraceLog(DEBUG, "[%s] Temp memory required: %i", fileName, info.temp_memory_required);
if (info.channels == 2) currentMusic.format = AL_FORMAT_STEREO16;
else currentMusic.format = AL_FORMAT_MONO16;
if (info.channels == 2){
currentMusic[musicIndex].ctx = InitAudioContext(info.sample_rate, mixIndex, 2, false);
}
else{
currentMusic[musicIndex].ctx = InitAudioContext(info.sample_rate, mixIndex, 1, false);
}
currentMusic.loop = true; // We loop by default
currentMusic[musicIndex].loop = true; // We loop by default
musicEnabled = true;
// Create an audio source
alGenSources(1, &currentMusic.source); // Generate pointer to audio 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);
//alSourcei(currentMusic.source, AL_LOOPING, AL_TRUE); // ERROR: Buffers do not queue!
// Generate two OpenAL buffers
alGenBuffers(2, currentMusic.buffers);
// Fill buffers with music...
BufferMusicStream(currentMusic.buffers[0]);
BufferMusicStream(currentMusic.buffers[1]);
// Queue buffers and start playing
alSourceQueueBuffers(currentMusic.source, 2, currentMusic.buffers);
alSourcePlay(currentMusic.source);
// NOTE: Regularly, we must check if a buffer has been processed and refill it: UpdateMusicStream()
currentMusic.totalSamplesLeft = stb_vorbis_stream_length_in_samples(currentMusic.stream) * currentMusic.channels;
currentMusic.totalLengthSeconds = stb_vorbis_stream_length_in_seconds(currentMusic.stream);
currentMusic[musicIndex].totalSamplesLeft = stb_vorbis_stream_length_in_samples(currentMusic[musicIndex].stream) * currentMusic[musicIndex].channels;
currentMusic[musicIndex].totalLengthSeconds = stb_vorbis_stream_length_in_seconds(currentMusic[musicIndex].stream);
}
}
else if (strcmp(GetExtension(fileName),"xm") == 0)
{
// Stop current music, clean buffers, unload current stream
StopMusicStream();
// new song settings for xm chiptune
currentMusic.chipTune = true;
currentMusic.channels = 2;
currentMusic.sampleRate = 48000;
currentMusic.loop = true;
// only stereo is supported for xm
if(!jar_xm_create_context_from_file(&currentMusic.chipctx, currentMusic.sampleRate, fileName))
if(!jar_xm_create_context_from_file(&currentMusic[musicIndex].chipctx, 48000, fileName))
{
currentMusic.format = AL_FORMAT_STEREO16;
jar_xm_set_max_loop_count(currentMusic.chipctx, 0); // infinite number of loops
currentMusic.totalSamplesLeft = jar_xm_get_remaining_samples(currentMusic.chipctx);
currentMusic.totalLengthSeconds = ((float)currentMusic.totalSamplesLeft) / ((float)currentMusic.sampleRate);
currentMusic[musicIndex].chipTune = true;
currentMusic[musicIndex].loop = true;
jar_xm_set_max_loop_count(currentMusic[musicIndex].chipctx, 0); // infinite number of loops
currentMusic[musicIndex].totalSamplesLeft = jar_xm_get_remaining_samples(currentMusic[musicIndex].chipctx);
currentMusic[musicIndex].totalLengthSeconds = ((float)currentMusic[musicIndex].totalSamplesLeft) / ((float)currentMusic[musicIndex].sampleRate);
musicEnabled = true;
TraceLog(INFO, "[%s] XM number of samples: %i", fileName, currentMusic.totalSamplesLeft);
TraceLog(INFO, "[%s] XM track length: %11.6f sec", fileName, currentMusic.totalLengthSeconds);
TraceLog(INFO, "[%s] XM number of samples: %i", fileName, currentMusic[musicIndex].totalSamplesLeft);
TraceLog(INFO, "[%s] XM track length: %11.6f sec", fileName, currentMusic[musicIndex].totalLengthSeconds);
// 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);
// NOTE: Regularly, we must check if a buffer has been processed and refill it: UpdateMusicStream()
currentMusic[musicIndex].ctx = InitAudioContext(48000, mixIndex, 2, true);
}
else TraceLog(WARNING, "[%s] XM file could not be opened", fileName);
}
else TraceLog(WARNING, "[%s] Music extension not recognized, it can't be loaded", fileName);
}
// Stop music playing (close stream)
void StopMusicStream(void)
// Stop music playing for individual music index of currentMusic array (close stream)
void StopMusicStream(int index)
{
if (musicEnabled)
if (index < MAX_MUSIC_STREAMS && currentMusic[index].ctx)
{
alSourceStop(currentMusic.source);
EmptyMusicStream(); // Empty music buffers
alDeleteSources(1, &currentMusic.source);
alDeleteBuffers(2, currentMusic.buffers);
CloseAudioContext(currentMusic[index].ctx);
if (currentMusic.chipTune)
if (currentMusic[index].chipTune)
{
jar_xm_free_context(currentMusic.chipctx);
jar_xm_free_context(currentMusic[index].chipctx);
}
else
{
stb_vorbis_close(currentMusic.stream);
stb_vorbis_close(currentMusic[index].stream);
}
if(!getMusicStreamCount()) musicEnabled = false;
}
}
musicEnabled = false;
//get number of music channels active at this time, this does not mean they are playing
int getMusicStreamCount(void)
{
int musicCount;
for(int musicIndex = 0; musicIndex < MAX_MUSIC_STREAMS; musicIndex++) // find empty music slot
if(currentMusic[musicIndex].stream != NULL || currentMusic[musicIndex].chipTune) musicCount++;
return musicCount;
}
// Pause music playing
void PauseMusicStream(void)
void PauseMusicStream(int index)
{
// Pause music stream if music available!
if (musicEnabled)
{
TraceLog(INFO, "Pausing music stream");
alSourcePause(currentMusic.source);
UpdateAudioContext(currentMusic[index].ctx, NULL, 0); // pushing null data auto pauses stream
musicEnabled = false;
}
}
// Resume music playing
void ResumeMusicStream(void)
void ResumeMusicStream(int index)
{
// Resume music playing... if music available!
ALenum state;
alGetSourcei(currentMusic.source, AL_SOURCE_STATE, &state);
if (state == AL_PAUSED)
{
TraceLog(INFO, "Resuming music stream");
alSourcePlay(currentMusic.source);
musicEnabled = true;
if(currentMusic[musicIndex].ctx){
alGetSourcei(currentMusic[musicIndex].ctx->alSource, AL_SOURCE_STATE, &state);
if (state == AL_PAUSED)
{
TraceLog(INFO, "Resuming music stream");
alSourcePlay(currentMusic[musicIndex].ctx->alSource);
musicEnabled = true;
}
}
}
@ -922,17 +896,24 @@ bool IsMusicPlaying(void)
{
bool playing = false;
ALint state;
alGetSourcei(currentMusic.source, AL_SOURCE_STATE, &state);
if (state == AL_PLAYING) playing = true;
for(int musicIndex = 0; musicIndex < MAX_MUSIC_STREAMS; musicIndex++)
{
if(currentMusic[musicIndex].ctx){
alGetSourcei(currentMusic[musicIndex].ctx->alSource, AL_SOURCE_STATE, &state);
if (state == AL_PLAYING) playing = true;
}
}
return playing;
}
// Set volume for music
void SetMusicVolume(float volume)
void SetMusicVolume(int index, float volume)
{
alSourcef(currentMusic.source, AL_GAIN, volume);
if(currentMusic[musicIndex].ctx){
alSourcef(currentMusic[musicIndex].ctx->alSource, AL_GAIN, volume);
}
}
// Get current music time length (in seconds)

9
src/audio.h
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@ -102,13 +102,14 @@ void SetSoundPitch(Sound sound, float pitch); // Set pitch for
void PlayMusicStream(char *fileName); // Start music playing (open stream)
void UpdateMusicStream(void); // Updates buffers for music streaming
void StopMusicStream(void); // Stop music playing (close stream)
void PauseMusicStream(void); // Pause music playing
void ResumeMusicStream(void); // Resume playing paused music
void StopMusicStream(int index); // Stop music playing (close stream)
void PauseMusicStream(int index); // Pause music playing
void ResumeMusicStream(int index); // Resume playing paused music
bool IsMusicPlaying(void); // Check if music is playing
void SetMusicVolume(float volume); // Set volume for music (1.0 is max level)
void SetMusicVolume(int index, float volume); // Set volume for music (1.0 is max level)
float GetMusicTimeLength(void); // Get music time length (in seconds)
float GetMusicTimePlayed(void); // Get current music time played (in seconds)
int getMusicStreamCount(void);
#ifdef __cplusplus
}

9
src/raylib.h
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@ -893,13 +893,14 @@ void SetSoundPitch(Sound sound, float pitch); // Set pitch for
void PlayMusicStream(char *fileName); // Start music playing (open stream)
void UpdateMusicStream(void); // Updates buffers for music streaming
void StopMusicStream(void); // Stop music playing (close stream)
void PauseMusicStream(void); // Pause music playing
void ResumeMusicStream(void); // Resume playing paused music
void StopMusicStream(int index); // Stop music playing (close stream)
void PauseMusicStream(int index); // Pause music playing
void ResumeMusicStream(int index); // Resume playing paused music
bool IsMusicPlaying(void); // Check if music is playing
void SetMusicVolume(float volume); // Set volume for music (1.0 is max level)
void SetMusicVolume(int index, float volume); // Set volume for music (1.0 is max level)
float GetMusicTimeLength(void); // Get current music time length (in seconds)
float GetMusicTimePlayed(void); // Get current music time played (in seconds)
int getMusicStreamCount(void);
#ifdef __cplusplus
}