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@@ -59,6 +59,7 @@
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// Defines and Macros
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// Defines and Macros
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//----------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------
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#define MUSIC_STREAM_BUFFERS 2
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#define MUSIC_STREAM_BUFFERS 2
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+#define MAX_AUDIO_CONTEXTS 4
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#if defined(PLATFORM_RPI) || defined(PLATFORM_ANDROID)
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#if defined(PLATFORM_RPI) || defined(PLATFORM_ANDROID)
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// NOTE: On RPI and Android should be lower to avoid frame-stalls
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// NOTE: On RPI and Android should be lower to avoid frame-stalls
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@@ -95,9 +96,9 @@ typedef struct Music {
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// a dedicated mix channel.
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// a dedicated mix channel.
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typedef struct AudioContext_t {
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typedef struct AudioContext_t {
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unsigned short sampleRate; // default is 48000
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unsigned short sampleRate; // default is 48000
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- BPS bitsPerSample; // 16 is default
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- mix_t mixChannel; // 0-3 or mixA-mixD, each mix channel can receive up to one dedicated audio stream
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- channel_t channels; // 1=mono, 2=stereo
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+ unsigned char bitsPerSample; // 16 is default
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+ unsigned char mixChannel; // 0-3 or mixA-mixD, each mix channel can receive up to one dedicated audio stream
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+ unsigned char channels; // 1=mono, 2=stereo
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ALenum alFormat; // openAL format specifier
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ALenum alFormat; // openAL format specifier
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ALuint alSource; // openAL source
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ALuint alSource; // openAL source
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ALuint alBuffer[2]; // openAL sample buffer
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ALuint alBuffer[2]; // openAL sample buffer
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@@ -110,10 +111,10 @@ typedef enum { INFO = 0, ERROR, WARNING, DEBUG, OTHER } TraceLogType;
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//----------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------
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// Global Variables Definition
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// Global Variables Definition
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//----------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------
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-static AudioContext_t* mixChannelsActive_g[4]; // What mix channels are currently active
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+static AudioContext_t* mixChannelsActive_g[MAX_AUDIO_CONTEXTS]; // What mix channels are currently active
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static bool musicEnabled = false;
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static bool musicEnabled = false;
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-static Music currentMusic; // Current music loaded
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- // NOTE: Only one music file playing at a time
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+static Music currentMusic; // Current music loaded
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+ // NOTE: Only one music file playing at a time
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//----------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------
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// Module specific Functions Declaration
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// Module specific Functions Declaration
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@@ -179,7 +180,7 @@ void CloseAudioDevice(void)
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}
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}
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// True if call to InitAudioDevice() was successful and CloseAudioDevice() has not been called yet
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// True if call to InitAudioDevice() was successful and CloseAudioDevice() has not been called yet
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-bool AudioDeviceReady(void)
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+bool IsAudioDeviceReady(void)
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{
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{
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ALCcontext *context = alcGetCurrentContext();
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ALCcontext *context = alcGetCurrentContext();
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if (context == NULL) return false;
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if (context == NULL) return false;
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@@ -195,11 +196,12 @@ bool AudioDeviceReady(void)
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//----------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------
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// Audio contexts are for outputing custom audio waveforms, This will shut down any other sound sources currently playing
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// Audio contexts are for outputing custom audio waveforms, This will shut down any other sound sources currently playing
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-// The mix_t is what mix channel you want to operate on, mixA->mixD are the ones available. Each mix channel can only be used one at a time.
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-// exmple usage is InitAudioContext(48000, sixteenBPS, mixA, stereo);
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-AudioContext InitAudioContext(unsigned short sampleRate, BPS bitsPerSample, mix_t mixChannel, channel_t channels)
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+// The mixChannel is what mix channel you want to operate on, 0-3 are the ones available. Each mix channel can only be used one at a time.
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+// exmple usage is InitAudioContext(48000, 16, 0, 2); // stereo, mixchannel 1, 16bit, 48khz
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+AudioContext InitAudioContext(unsigned short sampleRate, unsigned char bitsPerSample, unsigned char mixChannel, unsigned char channels)
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{
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{
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- if(!AudioDeviceReady()) InitAudioDevice();
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+ if(mixChannel > MAX_AUDIO_CONTEXTS) return NULL;
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+ if(!IsAudioDeviceReady()) InitAudioDevice();
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else StopMusicStream();
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else StopMusicStream();
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if(!mixChannelsActive_g[mixChannel]){
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if(!mixChannelsActive_g[mixChannel]){
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@@ -211,15 +213,15 @@ AudioContext InitAudioContext(unsigned short sampleRate, BPS bitsPerSample, mix_
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mixChannelsActive_g[mixChannel] = ac;
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mixChannelsActive_g[mixChannel] = ac;
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// setup openAL format
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// setup openAL format
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- if (channels == mono)
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+ if (channels == 1)
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{
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{
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- if (bitsPerSample == eightBPS ) ac->alFormat = AL_FORMAT_MONO8;
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- else if (bitsPerSample == sixteenBPS) ac->alFormat = AL_FORMAT_MONO16;
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+ if (bitsPerSample == 8 ) ac->alFormat = AL_FORMAT_MONO8;
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+ else if (bitsPerSample == 16) ac->alFormat = AL_FORMAT_MONO16;
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}
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}
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- else if (channels == stereo)
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+ else if (channels == 2)
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{
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{
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- if (bitsPerSample == eightBPS ) ac->alFormat = AL_FORMAT_STEREO8;
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- else if (bitsPerSample == sixteenBPS) ac->alFormat = AL_FORMAT_STEREO16;
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+ if (bitsPerSample == 8 ) ac->alFormat = AL_FORMAT_STEREO8;
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+ else if (bitsPerSample == 16) ac->alFormat = AL_FORMAT_STEREO16;
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}
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}
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// Create an audio source
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// Create an audio source
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