diff options
Diffstat (limited to 'src/audio/oal/stream.cpp')
| -rw-r--r-- | src/audio/oal/stream.cpp | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/src/audio/oal/stream.cpp b/src/audio/oal/stream.cpp new file mode 100644 index 00000000..9bca0546 --- /dev/null +++ b/src/audio/oal/stream.cpp @@ -0,0 +1,520 @@ +#include "stream.h" + +#ifdef AUDIO_OAL +#include "common.h" +#include "sampman.h" + +typedef long ssize_t; + +#include <sndfile.h> +#include <mpg123.h> + +#pragma comment( lib, "libsndfile-1.lib" ) +#pragma comment( lib, "libmpg123.lib" ) + +class CSndFile : public IDecoder +{ + SNDFILE *m_pfSound; + SF_INFO m_soundInfo; +public: + CSndFile(const char *path) : + m_pfSound(nil) + { + memset(&m_soundInfo, 0, sizeof(m_soundInfo)); + m_pfSound = sf_open(path, SFM_READ, &m_soundInfo); + } + + ~CSndFile() + { + if ( m_pfSound ) + { + sf_close(m_pfSound); + m_pfSound = nil; + } + } + + bool IsOpened() + { + return m_pfSound != nil; + } + + uint32 GetSampleSize() + { + return sizeof(uint16); + } + + uint32 GetSampleCount() + { + return m_soundInfo.frames; + } + + uint32 GetSampleRate() + { + return m_soundInfo.samplerate; + } + + uint32 GetChannels() + { + return m_soundInfo.channels; + } + + void Seek(uint32 milliseconds) + { + if ( !IsOpened() ) return; + sf_seek(m_pfSound, ms2samples(milliseconds), SF_SEEK_SET); + } + + uint32 Tell() + { + if ( !IsOpened() ) return 0; + return samples2ms(sf_seek(m_pfSound, 0, SF_SEEK_CUR)); + } + + uint32 Decode(void *buffer) + { + if ( !IsOpened() ) return 0; + return sf_read_short(m_pfSound, (short *)buffer, GetBufferSamples()) * GetSampleSize(); + } +}; + +class CMP3File : public IDecoder +{ + mpg123_handle *m_pMH; + bool m_bOpened; + uint32 m_nRate; + uint32 m_nChannels; +public: + CMP3File(const char *path) : + m_pMH(nil), + m_bOpened(false), + m_nRate(0), + m_nChannels(0) + { + m_pMH = mpg123_new(nil, nil); + if ( m_pMH ) + { + long rate = 0; + int channels = 0; + int encoding = 0; + + m_bOpened = mpg123_open(m_pMH, path) == MPG123_OK + && mpg123_getformat(m_pMH, &rate, &channels, &encoding) == MPG123_OK; + m_nRate = rate; + m_nChannels = channels; + + if ( IsOpened() ) + { + mpg123_format_none(m_pMH); + mpg123_format(m_pMH, rate, channels, encoding); + } + } + } + + ~CMP3File() + { + if ( m_pMH ) + { + mpg123_close(m_pMH); + mpg123_delete(m_pMH); + m_pMH = nil; + } + } + + bool IsOpened() + { + return m_bOpened; + } + + uint32 GetSampleSize() + { + return sizeof(uint16); + } + + uint32 GetSampleCount() + { + if ( !IsOpened() ) return 0; + return mpg123_length(m_pMH); + } + + uint32 GetSampleRate() + { + return m_nRate; + } + + uint32 GetChannels() + { + return m_nChannels; + } + + void Seek(uint32 milliseconds) + { + if ( !IsOpened() ) return; + mpg123_seek(m_pMH, ms2samples(milliseconds)*GetSampleSize(), SEEK_SET); + } + + uint32 Tell() + { + if ( !IsOpened() ) return 0; + return samples2ms(mpg123_tell(m_pMH)/GetSampleSize()); + } + + uint32 Decode(void *buffer) + { + if ( !IsOpened() ) return 0; + + size_t size; + int err = mpg123_read(m_pMH, (unsigned char *)buffer, GetBufferSize(), &size); + if (err != MPG123_OK && err != MPG123_DONE) return 0; + return size; + } +}; + +void CStream::Initialise() +{ + mpg123_init(); +} + +void CStream::Terminate() +{ + mpg123_exit(); +} + +CStream::CStream(char *filename, ALuint &source, ALuint (&buffers)[NUM_STREAMBUFFERS]) : + m_alSource(source), + m_alBuffers(buffers), + m_pBuffer(nil), + m_bPaused(false), + m_bActive(false), + m_pSoundFile(nil), + m_bReset(false), + m_nVolume(0), + m_nPan(0), + m_nPosBeforeReset(0) + +{ + strcpy(m_aFilename, filename); + + DEV("Stream %s\n", m_aFilename); + + if (!strcasecmp(&m_aFilename[strlen(m_aFilename) - strlen(".mp3")], ".mp3")) + m_pSoundFile = new CMP3File(m_aFilename); + else if (!strcasecmp(&m_aFilename[strlen(m_aFilename) - strlen(".wav")], ".wav")) + m_pSoundFile = new CSndFile(m_aFilename); + else + m_pSoundFile = nil; + ASSERT(m_pSoundFile != nil); + if (m_pSoundFile && m_pSoundFile->IsOpened() ) + { + m_pBuffer = malloc(m_pSoundFile->GetBufferSize()); + ASSERT(m_pBuffer!=nil); + + DEV("AvgSamplesPerSec: %d\n", m_pSoundFile->GetAvgSamplesPerSec()); + DEV("SampleCount: %d\n", m_pSoundFile->GetSampleCount()); + DEV("SampleRate: %d\n", m_pSoundFile->GetSampleRate()); + DEV("Channels: %d\n", m_pSoundFile->GetChannels()); + DEV("Buffer Samples: %d\n", m_pSoundFile->GetBufferSamples()); + DEV("Buffer sec: %f\n", (float(m_pSoundFile->GetBufferSamples()) / float(m_pSoundFile->GetChannels())/ float(m_pSoundFile->GetSampleRate()))); + DEV("Length MS: %02d:%02d\n", (m_pSoundFile->GetLength() / 1000) / 60, (m_pSoundFile->GetLength() / 1000) % 60); + + return; + } +} + +CStream::~CStream() +{ + Delete(); +} + +void CStream::Delete() +{ + Stop(); + ClearBuffers(); + + if ( m_pSoundFile ) + { + delete m_pSoundFile; + m_pSoundFile = nil; + } + + if ( m_pBuffer ) + { + free(m_pBuffer); + m_pBuffer = nil; + } +} + +bool CStream::HasSource() +{ + return m_alSource != AL_NONE; +} + +bool CStream::IsOpened() +{ + return m_pSoundFile->IsOpened(); +} + +bool CStream::IsPlaying() +{ + if ( !HasSource() || !IsOpened() ) return false; + + if ( m_pSoundFile->IsOpened() && !m_bPaused ) + { + ALint sourceState; + alGetSourcei(m_alSource, AL_SOURCE_STATE, &sourceState); + if ( m_bActive || sourceState == AL_PLAYING ) + return true; + } + + return false; +} + +void CStream::Pause() +{ + if ( !HasSource() ) return; + ALint sourceState = AL_PAUSED; + alGetSourcei(m_alSource, AL_SOURCE_STATE, &sourceState); + if (sourceState != AL_PAUSED ) + alSourcePause(m_alSource); +} + +void CStream::SetPause(bool bPause) +{ + if ( !HasSource() ) return; + if ( bPause ) + { + Pause(); + m_bPaused = true; + } + else + { + if (m_bPaused) + SetPlay(true); + m_bPaused = false; + } +} + +void CStream::SetPitch(float pitch) +{ + if ( !HasSource() ) return; + alSourcef(m_alSource, AL_PITCH, pitch); +} + +void CStream::SetGain(float gain) +{ + if ( !HasSource() ) return; + alSourcef(m_alSource, AL_GAIN, gain); +} + +void CStream::SetPosition(float x, float y, float z) +{ + if ( !HasSource() ) return; + alSource3f(m_alSource, AL_POSITION, x, y, z); +} + +void CStream::SetVolume(uint32 nVol) +{ + m_nVolume = nVol; + SetGain(ALfloat(nVol) / MAX_VOLUME); +} + +void CStream::SetPan(uint8 nPan) +{ + m_nPan = nPan; + SetPosition((nPan - 63)/64.0f, 0.0f, Sqrt(1.0f-SQR((nPan-63)/64.0f))); +} + +void CStream::SetPosMS(uint32 nPos) +{ + if ( !m_pSoundFile->IsOpened() ) return; + m_pSoundFile->Seek(nPos); + ClearBuffers(); +} + +uint32 CStream::GetPosMS() +{ + if ( !HasSource() ) return 0; + if ( !m_pSoundFile->IsOpened() ) return 0; + + ALint offset; + //alGetSourcei(m_alSource, AL_SAMPLE_OFFSET, &offset); + alGetSourcei(m_alSource, AL_BYTE_OFFSET, &offset); + + return m_pSoundFile->Tell() + - m_pSoundFile->samples2ms(m_pSoundFile->GetBufferSamples() * (NUM_STREAMBUFFERS-1)) + + m_pSoundFile->samples2ms(offset/m_pSoundFile->GetSampleSize()); +} + +uint32 CStream::GetLengthMS() +{ + if ( !m_pSoundFile->IsOpened() ) return 0; + return m_pSoundFile->GetLength(); +} + +bool CStream::FillBuffer(ALuint alBuffer) +{ + if ( !HasSource() ) + return false; + if ( !m_pSoundFile->IsOpened() ) + return false; + if ( !(alBuffer != AL_NONE && alIsBuffer(alBuffer)) ) + return false; + + uint32 size = m_pSoundFile->Decode(m_pBuffer); + if( size == 0 ) + return false; + + alBufferData(alBuffer, m_pSoundFile->GetChannels() == 1 ? AL_FORMAT_MONO16 : AL_FORMAT_STEREO16, + m_pBuffer, size, m_pSoundFile->GetSampleRate()); + + return true; +} + +int32 CStream::FillBuffers() +{ + int32 i = 0; + for ( i = 0; i < NUM_STREAMBUFFERS; i++ ) + { + if ( !FillBuffer(m_alBuffers[i]) ) + break; + alSourceQueueBuffers(m_alSource, 1, &m_alBuffers[i]); + } + + return i; +} + +void CStream::ClearBuffers() +{ + if ( !HasSource() ) return; + + ALint buffersQueued; + alGetSourcei(m_alSource, AL_BUFFERS_QUEUED, &buffersQueued); + + ALuint value; + while (buffersQueued--) + alSourceUnqueueBuffers(m_alSource, 1, &value); +} + +bool CStream::Setup() +{ + if ( m_pSoundFile->IsOpened() ) + { + m_pSoundFile->Seek(0); + alSourcei(m_alSource, AL_SOURCE_RELATIVE, AL_TRUE); + //SetPosition(0.0f, 0.0f, 0.0f); + SetPitch(1.0f); + //SetPan(m_nPan); + //SetVolume(100); + } + + return IsOpened(); +} + +void CStream::SetPlay(bool state) +{ + if ( !HasSource() ) return; + if ( state ) + { + ALint sourceState = AL_PLAYING; + alGetSourcei(m_alSource, AL_SOURCE_STATE, &sourceState); + if (sourceState != AL_PLAYING ) + alSourcePlay(m_alSource); + m_bActive = true; + } + else + { + ALint sourceState = AL_STOPPED; + alGetSourcei(m_alSource, AL_SOURCE_STATE, &sourceState); + if (sourceState != AL_STOPPED ) + alSourceStop(m_alSource); + m_bActive = false; + } +} + +void CStream::Start() +{ + if ( !HasSource() ) return; + if ( FillBuffers() != 0 ) + SetPlay(true); +} + +void CStream::Stop() +{ + if ( !HasSource() ) return; + SetPlay(false); +} + +void CStream::Update() +{ + if ( !IsOpened() ) + return; + + if ( !HasSource() ) + return; + + if ( m_bReset ) + return; + + if ( !m_bPaused ) + { + ALint sourceState; + ALint buffersProcessed = 0; + + alGetSourcei(m_alSource, AL_SOURCE_STATE, &sourceState); + alGetSourcei(m_alSource, AL_BUFFERS_PROCESSED, &buffersProcessed); + + ALint looping = AL_FALSE; + alGetSourcei(m_alSource, AL_LOOPING, &looping); + + if ( looping == AL_TRUE ) + { + TRACE("stream set looping"); + alSourcei(m_alSource, AL_LOOPING, AL_TRUE); + } + + while( buffersProcessed-- ) + { + ALuint buffer; + + alSourceUnqueueBuffers(m_alSource, 1, &buffer); + + if ( m_bActive && FillBuffer(buffer) ) + alSourceQueueBuffers(m_alSource, 1, &buffer); + } + + if ( sourceState != AL_PLAYING ) + { + alGetSourcei(m_alSource, AL_BUFFERS_PROCESSED, &buffersProcessed); + SetPlay(buffersProcessed!=0); + } + } +} + +void CStream::ProviderInit() +{ + if ( m_bReset ) + { + if ( Setup() ) + { + SetPan(m_nPan); + SetVolume(m_nVolume); + SetPosMS(m_nPosBeforeReset); + if (m_bActive) + FillBuffers(); + SetPlay(m_bActive); + if ( m_bPaused ) + Pause(); + } + + m_bReset = false; + } +} + +void CStream::ProviderTerm() +{ + m_bReset = true; + m_nPosBeforeReset = GetPosMS(); + + ClearBuffers(); +} + +#endif
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