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2dc5f580a6
raylib/src/audio.c
raysan5 2dc5f580a6 Removed audio errors register
2016-08-01 12:58:30 +02:00

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/**********************************************************************************************
*
* raylib.audio
*
* Basic functions to manage Audio:
* Manage audio device (init/close)
* Load and Unload audio files
* Play/Stop/Pause/Resume loaded audio
* Manage mixing channels
* Manage raw audio context
*
* Uses external lib:
* OpenAL Soft - Audio device management lib (http://kcat.strangesoft.net/openal.html)
* stb_vorbis - Ogg audio files loading (http://www.nothings.org/stb_vorbis/)
* jar_xm - XM module file loading
* jar_mod - MOD audio file loading
*
* Many thanks to Joshua Reisenauer (github: @kd7tck) for the following additions:
* XM audio module support (jar_xm)
* MOD audio module support (jar_mod)
* Mixing channels support
* Raw audio context support
*
* Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
//#define AUDIO_STANDALONE // NOTE: To use the audio module as standalone lib, just uncomment this line
#if defined(AUDIO_STANDALONE)
#include "audio.h"
#else
#include "raylib.h"
#endif
#include "AL/al.h" // OpenAL basic header
#include "AL/alc.h" // OpenAL context header (like OpenGL, OpenAL requires a context to work)
#include <stdlib.h> // Required for: malloc(), free()
#include <string.h> // Required for: strcmp(), strncmp()
#include <stdio.h> // Required for: FILE, fopen(), fclose(), fread()
// Tokens defined by OpenAL extension: AL_EXT_float32
#ifndef AL_FORMAT_MONO_FLOAT32
#define AL_FORMAT_MONO_FLOAT32 0x10010
#endif
#ifndef AL_FORMAT_STEREO_FLOAT32
#define AL_FORMAT_STEREO_FLOAT32 0x10011
#endif
#if defined(AUDIO_STANDALONE)
#include <stdarg.h> // Required for: va_list, va_start(), vfprintf(), va_end()
#else
#include "utils.h" // Required for: DecompressData()
// NOTE: Includes Android fopen() function map
#endif
//#define STB_VORBIS_HEADER_ONLY
#include "external/stb_vorbis.h" // OGG loading functions
#define JAR_XM_IMPLEMENTATION
#include "external/jar_xm.h" // XM loading functions
#define JAR_MOD_IMPLEMENTATION
#include "external/jar_mod.h" // MOD loading functions
#ifdef _MSC_VER
#undef bool
#endif
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#define MAX_STREAM_BUFFERS 2 // Number of buffers for each audio stream
// NOTE: Music buffer size is defined by number of samples, independent of sample size
// After some math, considering a sampleRate of 48000, a buffer refill rate of 1/60 seconds
// and double-buffering system, I concluded that a 4096 samples buffer should be enough
// In case of music-stalls, just inclease this number
#define AUDIO_BUFFER_SIZE 4096 // PCM data samples (i.e. short: 32Kb)
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
typedef enum { MUSIC_AUDIO_OGG = 0, MUSIC_MODULE_XM, MUSIC_MODULE_MOD } MusicContextType;
// Used to create custom audio streams that are not bound to a specific file.
typedef struct AudioStream {
unsigned int sampleRate; // Frequency (samples per second): default is 48000
unsigned int sampleSize; // BitDepth (bits per sample): 8, 16, 32 (24 not supported)
unsigned int channels; // Number of channels
ALenum format; // OpenAL format specifier
ALuint source; // OpenAL source
ALuint buffers[MAX_STREAM_BUFFERS]; // OpenAL buffers (double buffering)
} AudioStream;
// Music type (file streaming from memory)
typedef struct Music {
MusicContextType ctxType; // Type of music context (OGG, XM, MOD)
stb_vorbis *ctxOgg; // OGG audio context
jar_xm_context_t *ctxXm; // XM chiptune context
jar_mod_context_t ctxMod; // MOD chiptune context
AudioStream stream; // Audio stream
bool loop; // Repeat music after finish (loop)
unsigned int totalSamples; // Total number of samples
unsigned int samplesLeft; // Number of samples left to end
} MusicData, *Music;
#if defined(AUDIO_STANDALONE)
typedef enum { INFO = 0, ERROR, WARNING, DEBUG, OTHER } TraceLogType;
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
// ...
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
static Wave LoadWAV(const char *fileName); // Load WAV file
static Wave LoadOGG(char *fileName); // Load OGG file
static void UnloadWave(Wave wave); // Unload wave data
static AudioStream InitAudioStream(unsigned int sampleRate, unsigned int sampleSize, unsigned int channels);
static void CloseAudioStream(AudioStream stream); // Frees mix channel
static int BufferAudioStream(AudioStream stream, void *data, int numberElements); // Pushes more audio data into mix channel
static bool BufferMusicStream(Music music, int numBuffersToProcess); // Fill music buffers with data
#if defined(AUDIO_STANDALONE)
const char *GetExtension(const char *fileName); // Get the extension for a filename
void TraceLog(int msgType, const char *text, ...); // Outputs a trace log message (INFO, ERROR, WARNING)
#endif
//----------------------------------------------------------------------------------
// Module Functions Definition - Audio Device initialization and Closing
//----------------------------------------------------------------------------------
// Initialize audio device
void InitAudioDevice(void)
{
// Open and initialize a device with default settings
ALCdevice *device = alcOpenDevice(NULL);
if (!device) TraceLog(ERROR, "Audio device could not be opened");
else
{
ALCcontext *context = alcCreateContext(device, NULL);
if ((context == NULL) || (alcMakeContextCurrent(context) == ALC_FALSE))
{
if (context != NULL) alcDestroyContext(context);
alcCloseDevice(device);
TraceLog(ERROR, "Could not initialize audio context");
}
else
{
TraceLog(INFO, "Audio device and context initialized successfully: %s", alcGetString(device, ALC_DEVICE_SPECIFIER));
// Listener definition (just for 2D)
alListener3f(AL_POSITION, 0, 0, 0);
alListener3f(AL_VELOCITY, 0, 0, 0);
alListener3f(AL_ORIENTATION, 0, 0, -1);
}
}
}
// Close the audio device for all contexts
void CloseAudioDevice(void)
{
ALCdevice *device;
ALCcontext *context = alcGetCurrentContext();
if (context == NULL) TraceLog(WARNING, "Could not get current audio context for closing");
device = alcGetContextsDevice(context);
alcMakeContextCurrent(NULL);
alcDestroyContext(context);
alcCloseDevice(device);
}
// Check if device has been initialized successfully
bool IsAudioDeviceReady(void)
{
ALCcontext *context = alcGetCurrentContext();
if (context == NULL) return false;
else
{
ALCdevice *device = alcGetContextsDevice(context);
if (device == NULL) return false;
else return true;
}
}
//----------------------------------------------------------------------------------
// Module Functions Definition - Sounds loading and playing (.WAV)
//----------------------------------------------------------------------------------
// Load sound to memory
// NOTE: The entire file is loaded to memory to be played (no-streaming)
Sound LoadSound(char *fileName)
{
Wave wave = { 0 };
if (strcmp(GetExtension(fileName), "wav") == 0) wave = LoadWAV(fileName);
else if (strcmp(GetExtension(fileName), "ogg") == 0) wave = LoadOGG(fileName);
else TraceLog(WARNING, "[%s] Sound extension not recognized, it can't be loaded", fileName);
Sound sound = LoadSoundFromWave(wave);
// Sound is loaded, we can unload wave
UnloadWave(wave);
return sound;
}
// Load sound from wave data
// NOTE: Wave data must be unallocated manually
Sound LoadSoundFromWave(Wave wave)
{
Sound sound = { 0 };
if (wave.data != NULL)
{
ALenum format = 0;
// The OpenAL format is worked out by looking at the number of channels and the bits per sample
if (wave.channels == 1)
{
if (wave.bitsPerSample == 8 ) format = AL_FORMAT_MONO8;
else if (wave.bitsPerSample == 16) format = AL_FORMAT_MONO16;
}
else if (wave.channels == 2)
{
if (wave.bitsPerSample == 8 ) format = AL_FORMAT_STEREO8;
else if (wave.bitsPerSample == 16) format = AL_FORMAT_STEREO16;
}
// Create an audio source
ALuint source;
alGenSources(1, &source); // Generate pointer to audio source
alSourcef(source, AL_PITCH, 1);
alSourcef(source, AL_GAIN, 1);
alSource3f(source, AL_POSITION, 0, 0, 0);
alSource3f(source, AL_VELOCITY, 0, 0, 0);
alSourcei(source, AL_LOOPING, AL_FALSE);
// Convert loaded data to OpenAL buffer
//----------------------------------------
ALuint buffer;
alGenBuffers(1, &buffer); // Generate pointer to buffer
// Upload sound data to buffer
alBufferData(buffer, format, wave.data, wave.dataSize, wave.sampleRate);
// Attach sound buffer to source
alSourcei(source, AL_BUFFER, buffer);
TraceLog(INFO, "[SND ID %i][BUFR ID %i] Sound data loaded successfully (SampleRate: %i, BitRate: %i, Channels: %i)", source, buffer, wave.sampleRate, wave.bitsPerSample, wave.channels);
sound.source = source;
sound.buffer = buffer;
}
return sound;
}
// Load sound to memory from rRES file (raylib Resource)
// TODO: Maybe rresName could be directly a char array with all the data?
Sound LoadSoundFromRES(const char *rresName, int resId)
{
Sound sound = { 0 };
#if defined(AUDIO_STANDALONE)
TraceLog(WARNING, "Sound loading from rRES resource file not supported on standalone mode");
#else
bool found = false;
char id[4]; // rRES file identifier
unsigned char version; // rRES file version and subversion
char useless; // rRES header reserved data
short numRes;
ResInfoHeader infoHeader;
FILE *rresFile = fopen(rresName, "rb");
if (rresFile == NULL) TraceLog(WARNING, "[%s] rRES raylib resource file could not be opened", rresName);
else
{
// Read rres file (basic file check - id)
fread(&id[0], sizeof(char), 1, rresFile);
fread(&id[1], sizeof(char), 1, rresFile);
fread(&id[2], sizeof(char), 1, rresFile);
fread(&id[3], sizeof(char), 1, rresFile);
fread(&version, sizeof(char), 1, rresFile);
fread(&useless, sizeof(char), 1, rresFile);
if ((id[0] != 'r') && (id[1] != 'R') && (id[2] != 'E') &&(id[3] != 'S'))
{
TraceLog(WARNING, "[%s] This is not a valid raylib resource file", rresName);
}
else
{
// Read number of resources embedded
fread(&numRes, sizeof(short), 1, rresFile);
for (int i = 0; i < numRes; i++)
{
fread(&infoHeader, sizeof(ResInfoHeader), 1, rresFile);
if (infoHeader.id == resId)
{
found = true;
// Check data is of valid SOUND type
if (infoHeader.type == 1) // SOUND data type
{
// TODO: Check data compression type
// NOTE: We suppose compression type 2 (DEFLATE - default)
// Reading SOUND parameters
Wave wave;
short sampleRate, bps;
char channels, reserved;
fread(&sampleRate, sizeof(short), 1, rresFile); // Sample rate (frequency)
fread(&bps, sizeof(short), 1, rresFile); // Bits per sample
fread(&channels, 1, 1, rresFile); // Channels (1 - mono, 2 - stereo)
fread(&reserved, 1, 1, rresFile); // <reserved>
wave.sampleRate = sampleRate;
wave.dataSize = infoHeader.srcSize;
wave.bitsPerSample = bps;
wave.channels = (short)channels;
unsigned char *data = malloc(infoHeader.size);
fread(data, infoHeader.size, 1, rresFile);
wave.data = DecompressData(data, infoHeader.size, infoHeader.srcSize);
free(data);
sound = LoadSoundFromWave(wave);
// Sound is loaded, we can unload wave data
UnloadWave(wave);
}
else TraceLog(WARNING, "[%s] Required resource do not seem to be a valid SOUND resource", rresName);
}
else
{
// Depending on type, skip the right amount of parameters
switch (infoHeader.type)
{
case 0: fseek(rresFile, 6, SEEK_CUR); break; // IMAGE: Jump 6 bytes of parameters
case 1: fseek(rresFile, 6, SEEK_CUR); break; // SOUND: Jump 6 bytes of parameters
case 2: fseek(rresFile, 5, SEEK_CUR); break; // MODEL: Jump 5 bytes of parameters (TODO: Review)
case 3: break; // TEXT: No parameters
case 4: break; // RAW: No parameters
default: break;
}
// Jump DATA to read next infoHeader
fseek(rresFile, infoHeader.size, SEEK_CUR);
}
}
}
fclose(rresFile);
}
if (!found) TraceLog(WARNING, "[%s] Required resource id [%i] could not be found in the raylib resource file", rresName, resId);
#endif
return sound;
}
// Unload sound
void UnloadSound(Sound sound)
{
alDeleteSources(1, &sound.source);
alDeleteBuffers(1, &sound.buffer);
TraceLog(INFO, "[SND ID %i][BUFR ID %i] Unloaded sound data from RAM", sound.source, sound.buffer);
}
// Play a sound
void PlaySound(Sound sound)
{
alSourcePlay(sound.source); // Play the sound
//TraceLog(INFO, "Playing sound");
// Find the current position of the sound being played
// NOTE: Only work when the entire file is in a single buffer
//int byteOffset;
//alGetSourcei(sound.source, AL_BYTE_OFFSET, &byteOffset);
//
//int sampleRate;
//alGetBufferi(sound.buffer, AL_FREQUENCY, &sampleRate); // AL_CHANNELS, AL_BITS (bps)
//float seconds = (float)byteOffset / sampleRate; // Number of seconds since the beginning of the sound
//or
//float result;
//alGetSourcef(sound.source, AL_SEC_OFFSET, &result); // AL_SAMPLE_OFFSET
}
// Pause a sound
void PauseSound(Sound sound)
{
alSourcePause(sound.source);
}
// Resume a paused sound
void ResumeSound(Sound sound)
{
ALenum state;
alGetSourcei(sound.source, AL_SOURCE_STATE, &state);
if (state == AL_PAUSED) alSourcePlay(sound.source);
}
// Stop reproducing a sound
void StopSound(Sound sound)
{
alSourceStop(sound.source);
}
// Check if a sound is playing
bool IsSoundPlaying(Sound sound)
{
bool playing = false;
ALint state;
alGetSourcei(sound.source, AL_SOURCE_STATE, &state);
if (state == AL_PLAYING) playing = true;
return playing;
}
// Set volume for a sound
void SetSoundVolume(Sound sound, float volume)
{
alSourcef(sound.source, AL_GAIN, volume);
}
// Set pitch for a sound
void SetSoundPitch(Sound sound, float pitch)
{
alSourcef(sound.source, AL_PITCH, pitch);
}
//----------------------------------------------------------------------------------
// Module Functions Definition - Music loading and stream playing (.OGG)
//----------------------------------------------------------------------------------
// Load music stream from file
Music LoadMusicStream(char *fileName)
{
Music music = (MusicData *)malloc(sizeof(MusicData));
if (strcmp(GetExtension(fileName), "ogg") == 0)
{
// Open ogg audio stream
music->ctxOgg = stb_vorbis_open_filename(fileName, NULL, NULL);
if (music->ctxOgg == NULL)
{
TraceLog(WARNING, "[%s] OGG audio file could not be opened", fileName);
}
else
{
stb_vorbis_info info = stb_vorbis_get_info(music->ctxOgg); // Get Ogg file info
TraceLog(DEBUG, "[%s] Ogg sample rate: %i", fileName, info.sample_rate);
TraceLog(DEBUG, "[%s] Ogg channels: %i", fileName, info.channels);
TraceLog(DEBUG, "[%s] Temp memory required: %i", fileName, info.temp_memory_required);
// TODO: Support 32-bit sampleSize OGGs
music->stream = InitAudioStream(info.sample_rate, 16, info.channels);
music->totalSamples = (unsigned int)stb_vorbis_stream_length_in_samples(music->ctxOgg)*info.channels;
music->samplesLeft = music->totalSamples;
//float totalLengthSeconds = stb_vorbis_stream_length_in_seconds(music->ctxOgg);
music->ctxType = MUSIC_AUDIO_OGG;
music->loop = true; // We loop by default
}
}
else if (strcmp(GetExtension(fileName), "xm") == 0)
{
int result = jar_xm_create_context_from_file(&music->ctxXm, 48000, fileName);
if (!result) // XM context created successfully
{
jar_xm_set_max_loop_count(music->ctxXm, 0); // Set infinite number of loops
music->totalSamples = (unsigned int)jar_xm_get_remaining_samples(music->ctxXm);
music->samplesLeft = music->totalSamples;
TraceLog(INFO, "[%s] XM number of samples: %i", fileName, music->totalSamples);
TraceLog(INFO, "[%s] XM track length: %11.6f sec", fileName, (float)music->totalSamples/48000.0f);
// NOTE: Only stereo is supported for XM
music->stream = InitAudioStream(48000, 32, 2);
music->ctxType = MUSIC_MODULE_XM;
music->loop = true;
}
else TraceLog(WARNING, "[%s] XM file could not be opened", fileName);
}
else if (strcmp(GetExtension(fileName), "mod") == 0)
{
jar_mod_init(&music->ctxMod);
if (jar_mod_load_file(&music->ctxMod, fileName))
{
music->totalSamples = (unsigned int)jar_mod_max_samples(&music->ctxMod);
music->samplesLeft = music->totalSamples;
TraceLog(INFO, "[%s] MOD number of samples: %i", fileName, music->samplesLeft);
TraceLog(INFO, "[%s] MOD track length: %11.6f sec", fileName, (float)music->totalSamples/48000.0f);
music->stream = InitAudioStream(48000, 16, 2);
music->ctxType = MUSIC_MODULE_MOD;
music->loop = true;
}
else TraceLog(WARNING, "[%s] MOD file could not be opened", fileName);
}
else TraceLog(WARNING, "[%s] Music extension not recognized, it can't be loaded", fileName);
return music;
}
// Unload music stream
void UnloadMusicStream(Music music)
{
CloseAudioStream(music->stream);
if (music->ctxType == MUSIC_AUDIO_OGG) stb_vorbis_close(music->ctxOgg);
else if (music->ctxType == MUSIC_MODULE_XM) jar_xm_free_context(music->ctxXm);
else if (music->ctxType == MUSIC_MODULE_MOD) jar_mod_unload(&music->ctxMod);
free(music);
}
// Start music playing (open stream)
void PlayMusicStream(Music music)
{
alSourcePlay(music->stream.source);
}
// Pause music playing
void PauseMusicStream(Music music)
{
alSourcePause(music->stream.source);
}
// Resume music playing
void ResumeMusicStream(Music music)
{
ALenum state;
alGetSourcei(music->stream.source, AL_SOURCE_STATE, &state);
if (state == AL_PAUSED) alSourcePlay(music->stream.source);
}
// Stop music playing (close stream)
void StopMusicStream(Music music)
{
alSourceStop(music->stream.source);
}
// Update (re-fill) music buffers if data already processed
void UpdateMusicStream(Music music)
{
ALenum state;
bool active = true;
ALint processed = 0;
// Determine if music stream is ready to be written
alGetSourcei(music->stream.source, AL_BUFFERS_PROCESSED, &processed);
if (processed > 0)
{
active = BufferMusicStream(music, processed);
if (!active && music->loop)
{
// Restart music context (if required)
if (music->ctxType == MUSIC_MODULE_MOD) jar_mod_seek_start(&music->ctxMod);
else if (music->ctxType == MUSIC_AUDIO_OGG) stb_vorbis_seek_start(music->ctxOgg);
music->samplesLeft = music->totalSamples;
// Determine if music stream is ready to be written
alGetSourcei(music->stream.source, AL_BUFFERS_PROCESSED, &processed);
active = BufferMusicStream(music, processed);
}
if (alGetError() != AL_NO_ERROR) TraceLog(WARNING, "Error buffering data...");
alGetSourcei(music->stream.source, AL_SOURCE_STATE, &state);
if (state != AL_PLAYING && active) alSourcePlay(music->stream.source);
if (!active) StopMusicStream(music);
}
}
// Check if any music is playing
bool IsMusicPlaying(Music music)
{
bool playing = false;
ALint state;
alGetSourcei(music->stream.source, AL_SOURCE_STATE, &state);
if (state == AL_PLAYING) playing = true;
return playing;
}
// Set volume for music
void SetMusicVolume(Music music, float volume)
{
alSourcef(music->stream.source, AL_GAIN, volume);
}
// Set pitch for music
void SetMusicPitch(Music music, float pitch)
{
alSourcef(music->stream.source, AL_PITCH, pitch);
}
// Get music time length (in seconds)
float GetMusicTimeLength(Music music)
{
float totalSeconds = (float)music->totalSamples/music->stream.sampleRate;
return totalSeconds;
}
// Get current music time played (in seconds)
float GetMusicTimePlayed(Music music)
{
float secondsPlayed = 0.0f;
if (music->ctxType == MUSIC_MODULE_XM)
{
uint64_t samplesPlayed;
jar_xm_get_position(music->ctxXm, NULL, NULL, NULL, &samplesPlayed);
// TODO: Not sure if this is the correct value
secondsPlayed = (float)samplesPlayed/(music->stream.sampleRate*music->stream.channels);
}
else if (music->ctxType == MUSIC_MODULE_MOD)
{
long samplesPlayed = jar_mod_current_samples(&music->ctxMod);
secondsPlayed = (float)samplesPlayed/music->stream.sampleRate;
}
else if (music->ctxType == MUSIC_AUDIO_OGG)
{
unsigned int samplesPlayed = music->totalSamples - music->samplesLeft;
secondsPlayed = (float)samplesPlayed/(music->stream.sampleRate*music->stream.channels);
}
return secondsPlayed;
}
//----------------------------------------------------------------------------------
// Module specific Functions Definition
//----------------------------------------------------------------------------------
// Init audio stream (to stream audio pcm data)
static AudioStream InitAudioStream(unsigned int sampleRate, unsigned int sampleSize, unsigned int channels)
{
AudioStream stream = { 0 };
stream.sampleRate = sampleRate;
stream.sampleSize = sampleSize;
stream.channels = channels;
// Setup OpenAL format
if (channels == 1)
{
switch (sampleSize)
{
case 8: stream.format = AL_FORMAT_MONO8; break;
case 16: stream.format = AL_FORMAT_MONO16; break;
case 32: stream.format = AL_FORMAT_MONO_FLOAT32; break;
default: TraceLog(WARNING, "Init audio stream: Sample size not supported: %i", sampleSize); break;
}
}
else if (channels == 2)
{
switch (sampleSize)
{
case 8: stream.format = AL_FORMAT_STEREO8; break;
case 16: stream.format = AL_FORMAT_STEREO16; break;
case 32: stream.format = AL_FORMAT_STEREO_FLOAT32; break;
default: TraceLog(WARNING, "Init audio stream: Sample size not supported: %i", sampleSize); break;
}
}
else TraceLog(WARNING, "Init audio stream: Number of channels not supported: %i", channels);
// Create an audio source
alGenSources(1, &stream.source);
alSourcef(stream.source, AL_PITCH, 1);
alSourcef(stream.source, AL_GAIN, 1);
alSource3f(stream.source, AL_POSITION, 0, 0, 0);
alSource3f(stream.source, AL_VELOCITY, 0, 0, 0);
// Create Buffers
alGenBuffers(MAX_STREAM_BUFFERS, stream.buffers);
// Initialize buffer with zeros by default
for (int i = 0; i < MAX_STREAM_BUFFERS; i++)
{
if (stream.sampleSize == 8)
{
unsigned char pcm[AUDIO_BUFFER_SIZE] = { 0 };
alBufferData(stream.buffers[i], stream.format, pcm, AUDIO_BUFFER_SIZE*sizeof(unsigned char), stream.sampleRate);
}
else if (stream.sampleSize == 16)
{
short pcm[AUDIO_BUFFER_SIZE] = { 0 };
alBufferData(stream.buffers[i], stream.format, pcm, AUDIO_BUFFER_SIZE*sizeof(short), stream.sampleRate);
}
else if (stream.sampleSize == 32)
{
float pcm[AUDIO_BUFFER_SIZE] = { 0.0f };
alBufferData(stream.buffers[i], stream.format, pcm, AUDIO_BUFFER_SIZE*sizeof(float), stream.sampleRate);
}
}
alSourceQueueBuffers(stream.source, MAX_STREAM_BUFFERS, stream.buffers);
TraceLog(INFO, "[AUD ID %i] Audio stream loaded successfully", stream.source);
return stream;
}
// Close audio stream and free memory
static void CloseAudioStream(AudioStream stream)
{
// Stop playing channel
alSourceStop(stream.source);
// Flush out all queued buffers
int queued = 0;
alGetSourcei(stream.source, AL_BUFFERS_QUEUED, &queued);
ALuint buffer = 0;
while (queued > 0)
{
alSourceUnqueueBuffers(stream.source, 1, &buffer);
queued--;
}
// Delete source and buffers
alDeleteSources(1, &stream.source);
alDeleteBuffers(MAX_STREAM_BUFFERS, stream.buffers);
TraceLog(INFO, "[AUD ID %i] Unloaded audio stream data", stream.source);
}
// Push more audio data into audio stream, only one buffer per call
// NOTE: Returns number of samples that were processed
static int BufferAudioStream(AudioStream stream, void *data, int numberElements)
{
if (!data || !numberElements)
{
// Pauses audio until data is given
alSourcePause(stream.source);
return 0;
}
ALuint buffer = 0;
alSourceUnqueueBuffers(stream.source, 1, &buffer);
if (!buffer) return 0;
// Reference
//void alBufferData(ALuint bufferName, ALenum format, const ALvoid *data, ALsizei size, ALsizei frequency);
// ALuint bufferName: buffer id
// ALenum format: Valid formats are
// AL_FORMAT_MONO8, // unsigned char
// AL_FORMAT_MONO16, // short
// AL_FORMAT_STEREO8,
// AL_FORMAT_STEREO16 // stereo data is interleaved: left+right channels sample
// AL_FORMAT_MONO_FLOAT32 (extension)
// AL_FORMAT_STEREO_FLOAT32 (extension)
// ALsizei size: Number of bytes, must be coherent with format
// ALsizei frequency: sample rate
if (stream.sampleSize == 8) alBufferData(buffer, stream.format, (unsigned char *)data, numberElements*sizeof(unsigned char), stream.sampleRate);
else if (stream.sampleSize == 16) alBufferData(buffer, stream.format, (short *)data, numberElements*sizeof(short), stream.sampleRate);
else if (stream.sampleSize == 32) alBufferData(buffer, stream.format, (float *)data, numberElements*sizeof(float), stream.sampleRate);
alSourceQueueBuffers(stream.source, 1, &buffer);
return numberElements;
}
// Fill music buffers with new data from music stream
static bool BufferMusicStream(Music music, int numBuffersToProcess)
{
short pcm[AUDIO_BUFFER_SIZE];
float pcmf[AUDIO_BUFFER_SIZE];
int size = 0; // Total size of data steamed in L+R samples for xm floats, individual L or R for ogg shorts
bool active = true; // We can get more data from stream (not finished)
if (music->ctxType == MUSIC_MODULE_XM) // There is no end of stream for xmfiles, once the end is reached zeros are generated for non looped chiptunes.
{
for (int i = 0; i < numBuffersToProcess; i++)
{
if (music->samplesLeft >= AUDIO_BUFFER_SIZE) size = AUDIO_BUFFER_SIZE/2;
else size = music->samplesLeft/2;
// Read 2*shorts and moves them to buffer+size memory location
jar_xm_generate_samples(music->ctxXm, pcmf, size);
BufferAudioStream(music->stream, pcmf, size*2);
music->samplesLeft -= size;
if (music->samplesLeft <= 0)
{
active = false;
break;
}
}
}
else if (music->ctxType == MUSIC_MODULE_MOD)
{
for (int i = 0; i < numBuffersToProcess; i++)
{
if (music->samplesLeft >= AUDIO_BUFFER_SIZE) size = AUDIO_BUFFER_SIZE/2;
else size = music->samplesLeft/2;
jar_mod_fillbuffer(&music->ctxMod, pcm, size, 0);
BufferAudioStream(music->stream, pcm, size*2);
music->samplesLeft -= size;
if (music->samplesLeft <= 0)
{
active = false;
break;
}
}
}
else if (music->ctxType == MUSIC_AUDIO_OGG)
{
if (music->samplesLeft >= AUDIO_BUFFER_SIZE) size = AUDIO_BUFFER_SIZE;
else size = music->samplesLeft;
for (int i = 0; i < numBuffersToProcess; i++)
{
// NOTE: Returns the number of samples stored per channel
int numSamples = stb_vorbis_get_samples_short_interleaved(music->ctxOgg, music->stream.channels, pcm, size);
BufferAudioStream(music->stream, pcm, numSamples*music->stream.channels);
music->samplesLeft -= (numSamples*music->stream.channels);
if (music->samplesLeft <= 0)
{
active = false;
break;
}
}
}
return active;
}
// Load WAV file into Wave structure
static Wave LoadWAV(const char *fileName)
{
// Basic WAV headers structs
typedef struct {
char chunkID[4];
int chunkSize;
char format[4];
} RiffHeader;
typedef struct {
char subChunkID[4];
int subChunkSize;
short audioFormat;
short numChannels;
int sampleRate;
int byteRate;
short blockAlign;
short bitsPerSample;
} WaveFormat;
typedef struct {
char subChunkID[4];
int subChunkSize;
} WaveData;
RiffHeader riffHeader;
WaveFormat waveFormat;
WaveData waveData;
Wave wave = { 0 };
FILE *wavFile;
wavFile = fopen(fileName, "rb");
if (wavFile == NULL)
{
TraceLog(WARNING, "[%s] WAV file could not be opened", fileName);
wave.data = NULL;
}
else
{
// Read in the first chunk into the struct
fread(&riffHeader, sizeof(RiffHeader), 1, wavFile);
// Check for RIFF and WAVE tags
if (strncmp(riffHeader.chunkID, "RIFF", 4) ||
strncmp(riffHeader.format, "WAVE", 4))
{
TraceLog(WARNING, "[%s] Invalid RIFF or WAVE Header", fileName);
}
else
{
// Read in the 2nd chunk for the wave info
fread(&waveFormat, sizeof(WaveFormat), 1, wavFile);
// Check for fmt tag
if ((waveFormat.subChunkID[0] != 'f') || (waveFormat.subChunkID[1] != 'm') ||
(waveFormat.subChunkID[2] != 't') || (waveFormat.subChunkID[3] != ' '))
{
TraceLog(WARNING, "[%s] Invalid Wave format", fileName);
}
else
{
// Check for extra parameters;
if (waveFormat.subChunkSize > 16) fseek(wavFile, sizeof(short), SEEK_CUR);
// Read in the the last byte of data before the sound file
fread(&waveData, sizeof(WaveData), 1, wavFile);
// Check for data tag
if ((waveData.subChunkID[0] != 'd') || (waveData.subChunkID[1] != 'a') ||
(waveData.subChunkID[2] != 't') || (waveData.subChunkID[3] != 'a'))
{
TraceLog(WARNING, "[%s] Invalid data header", fileName);
}
else
{
// Allocate memory for data
wave.data = (unsigned char *)malloc(sizeof(unsigned char) * waveData.subChunkSize);
// Read in the sound data into the soundData variable
fread(wave.data, waveData.subChunkSize, 1, wavFile);
// Now we set the variables that we need later
wave.dataSize = waveData.subChunkSize;
wave.sampleRate = waveFormat.sampleRate;
wave.channels = waveFormat.numChannels;
wave.bitsPerSample = waveFormat.bitsPerSample;
TraceLog(INFO, "[%s] WAV file loaded successfully (SampleRate: %i, BitRate: %i, Channels: %i)", fileName, wave.sampleRate, wave.bitsPerSample, wave.channels);
}
}
}
fclose(wavFile);
}
return wave;
}
// Load OGG file into Wave structure
// NOTE: Using stb_vorbis library
static Wave LoadOGG(char *fileName)
{
Wave wave;
stb_vorbis *oggFile = stb_vorbis_open_filename(fileName, NULL, NULL);
if (oggFile == NULL)
{
TraceLog(WARNING, "[%s] OGG file could not be opened", fileName);
wave.data = NULL;
}
else
{
stb_vorbis_info info = stb_vorbis_get_info(oggFile);
wave.sampleRate = info.sample_rate;
wave.bitsPerSample = 16;
wave.channels = info.channels;
TraceLog(DEBUG, "[%s] Ogg sample rate: %i", fileName, info.sample_rate);
TraceLog(DEBUG, "[%s] Ogg channels: %i", fileName, info.channels);
int totalSamplesLength = (stb_vorbis_stream_length_in_samples(oggFile)*info.channels);
wave.dataSize = totalSamplesLength*sizeof(short); // Size must be in bytes
TraceLog(DEBUG, "[%s] Samples length: %i", fileName, totalSamplesLength);
float totalSeconds = stb_vorbis_stream_length_in_seconds(oggFile);
TraceLog(DEBUG, "[%s] Total seconds: %f", fileName, totalSeconds);
if (totalSeconds > 10) TraceLog(WARNING, "[%s] Ogg audio lenght is larger than 10 seconds (%f), that's a big file in memory, consider music streaming", fileName, totalSeconds);
int totalSamples = totalSeconds*info.sample_rate*info.channels;
TraceLog(DEBUG, "[%s] Total samples calculated: %i", fileName, totalSamples);
wave.data = malloc(sizeof(short)*totalSamplesLength);
int samplesObtained = stb_vorbis_get_samples_short_interleaved(oggFile, info.channels, wave.data, totalSamplesLength);
TraceLog(DEBUG, "[%s] Samples obtained: %i", fileName, samplesObtained);
TraceLog(INFO, "[%s] OGG file loaded successfully (SampleRate: %i, BitRate: %i, Channels: %i)", fileName, wave.sampleRate, wave.bitsPerSample, wave.channels);
stb_vorbis_close(oggFile);
}
return wave;
}
// Unload Wave data
static void UnloadWave(Wave wave)
{
free(wave.data);
TraceLog(INFO, "Unloaded wave data from RAM");
}
// Some required functions for audio standalone module version
#if defined(AUDIO_STANDALONE)
// Get the extension for a filename
const char *GetExtension(const char *fileName)
{
const char *dot = strrchr(fileName, '.');
if(!dot || dot == fileName) return "";
return (dot + 1);
}
// Outputs a trace log message (INFO, ERROR, WARNING)
// NOTE: If a file has been init, output log is written there
void TraceLog(int msgType, const char *text, ...)
{
va_list args;
int traceDebugMsgs = 0;
#ifdef DO_NOT_TRACE_DEBUG_MSGS
traceDebugMsgs = 0;
#endif
switch(msgType)
{
case INFO: fprintf(stdout, "INFO: "); break;
case ERROR: fprintf(stdout, "ERROR: "); break;
case WARNING: fprintf(stdout, "WARNING: "); break;
case DEBUG: if (traceDebugMsgs) fprintf(stdout, "DEBUG: "); break;
default: break;
}
if ((msgType != DEBUG) || ((msgType == DEBUG) && (traceDebugMsgs)))
{
va_start(args, text);
vfprintf(stdout, text, args);
va_end(args);
fprintf(stdout, "\n");
}
if (msgType == ERROR) exit(1); // If ERROR message, exit program
}
#endif
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