test_openal.zip_openAL

#include "SoundFile.h" #include <vorbis/vorbisfile.h> typedef struct { char szRIFF[4]; unsigned long ulRIFFSize; char szWAVE[4]; } WAVEFILEHEADER; typedef struct { char szChunkName[4]; unsigned long ulChunkSize; } RIFFCHUNK; typedef struct { unsigned short usFormatTag; unsigned short usChannels; unsigned long ulSamplesPerSec; unsigned long ulAvgBytesPerSec; unsigned short usBlockAlign; unsigned short usBitsPerSample; unsigned short usSize; unsigned short usReserved; unsigned long ulChannelMask; GUID guidSubFormat; } WAVEFMT; size_t read_func(void *ptr, size_t size, size_t nmemb, void *datasource) { return ((IDevice*)datasource)->Read((uint8*)ptr, size*nmemb); } int seek_func(void *datasource, ogg_int64_t offset, int whence) { return ((IDevice*)datasource)->Seek(offset, whence); } int close_func(void *datasource) { return 0; } long tell_func(void* datasource) { return ((IDevice*)datasource)->Tell(); } ov_callbacks g_ovc = { read_func, seek_func, close_func, tell_func }; SoundFile::SoundFile() { _buffer = 0; _source = 0; _data = NULL; } SoundFile::~SoundFile() { if (0 != _source) { alDeleteSources(1, &_source); _source = 0; } if(0 != _buffer) { alDeleteBuffers(1, &_buffer); _buffer = 0; } if (_data) { free(_data); _data = 0; } } bool_t SoundFile::Load(IDevice& device) { if (!device.IsValid()) return FALSE; uint32 head; if (4 != device.Read((uint8*)&head, 4)) return FALSE; //wBitsPerSample == 8 ? AL_FORMAT_MONO8 : AL_FORMAT_MONO16 ALenum format = AL_FORMAT_MONO16; ALsizei freq = 0; device.Seek(0); // TODO: add big endian, little endian if (0x46464952 == head) // RIFF { uint_t data_off = 0; uint_t data_size = 0; WAVEFILEHEADER wfh; device.Read((uint8*)&wfh, sizeof(WAVEFILEHEADER)); assert(!_strnicmp(wfh.szRIFF, "RIFF", 4) && !_strnicmp(wfh.szWAVE, "WAVE", 4)); RIFFCHUNK rc; while (sizeof(RIFFCHUNK) == device.Read((uint8*)&rc, sizeof(RIFFCHUNK))) { if (!_strnicmp(rc.szChunkName, "fmt ", 4)) { if (rc.ulChunkSize <= sizeof(WAVEFMT)) { WAVEFMT wf; device.Read((uint8*)&wf, rc.ulChunkSize); assert(wf.usFormatTag == WAVE_FORMAT_PCM ); if (8 == wf.usBitsPerSample) format = AL_FORMAT_MONO8; freq = wf.ulSamplesPerSec; } else { device.Seek(rc.ulChunkSize, SEEK_CUR); } } else if (!_strnicmp(rc.szChunkName, "data", 4)) { data_size = rc.ulChunkSize; data_off = device.Tell(); device.Seek(rc.ulChunkSize, SEEK_CUR); } else { device.Seek( rc.ulChunkSize, SEEK_CUR); } if (rc.ulChunkSize & 1) device.Seek(1, SEEK_CUR); } if(_data) free(_data); _data = (uint8*)malloc(data_size); assert(_data); device.Seek(data_off, SEEK_SET); device.Read(_data, data_size); alGenBuffers( 1, &_buffer); assert( _buffer != AL_INVALID_VALUE && _buffer != AL_OUT_OF_MEMORY ); alBufferData(_buffer, format, _data, data_size, freq); } else if(0x5367674f == head) // OggS { OggVorbis_File ogg; if (0 != ov_open_callbacks(&device, &ogg, NULL, 0, g_ovc)) return FALSE; vorbis_info* info = ov_info(&ogg, -1); if (info->channels > 1) format = AL_FORMAT_STEREO16; int_t len = ov_pcm_total(&ogg, -1) * info->channels * 2; if(_data) free(_data); _data = (uint8*)malloc(len); int bs = -1; int_t todo = len; uint8* bufpt = _data; while (todo) { int read = ov_read(&ogg, (char *) bufpt, todo, 0 /*OGG_ENDIAN*/, 2, 1, &bs); todo -= read; bufpt += read; } alGenBuffers( 1, &_buffer); assert( _buffer != AL_INVALID_VALUE && _buffer != AL_OUT_OF_MEMORY ); alBufferData(_buffer, format, _data, len, info->rate); ov_clear(&ogg); } else return FALSE; alGenSources(1, &_source); alSourcei(_source, AL_BUFFER, _buffer); return TRUE; } bool_t SoundFile::Play(int_t type) { if(PLAY_LOOP == type) alSourcei (_source, AL_LOOPING, AL_TRUE); alSourcePlay(_source); return TRUE; } bool_t SoundFile::Stop() { alSourceStop(_source); return TRUE; } bool_t SoundFile::IsPlaying() { ALint state = 0; alGetSourcei(_source, AL_SOURCE_STATE, &state); return AL_PLAYING == state; }