int lua_AudioBuffer_addRef(lua_State* state)
{
// Get the number of parameters.
int paramCount = lua_gettop(state);
// Attempt to match the parameters to a valid binding.
switch (paramCount)
{
case 1:
{
if ((lua_type(state, 1) == LUA_TUSERDATA))
{
AudioBuffer* instance = getInstance(state);
instance->addRef();
return 0;
}
lua_pushstring(state, "lua_AudioBuffer_addRef - Failed to match the given parameters to a valid function signature.");
lua_error(state);
break;
}
default:
{
lua_pushstring(state, "Invalid number of parameters (expected 1).");
lua_error(state);
break;
}
}
return 0;
}
AudioBuffer* AudioBuffer::create(const char* path)
{
GP_ASSERT(path);
// Search the cache for a stream from this file.
unsigned int bufferCount = (unsigned int)__buffers.size();
AudioBuffer* buffer = NULL;
for (unsigned int i = 0; i < bufferCount; i++)
{
buffer = __buffers[i];
GP_ASSERT(buffer);
if (buffer->_filePath.compare(path) == 0)
{
buffer->addRef();
return buffer;
}
}
ALuint alBuffer;
// Load audio data into a buffer.
AL_CHECK( alGenBuffers(1, &alBuffer) );
if (AL_LAST_ERROR())
{
GP_ERROR("Failed to create OpenAL buffer; alGenBuffers error: %d", AL_LAST_ERROR());
AL_CHECK( alDeleteBuffers(1, &alBuffer) );
return NULL;
}
// Load sound file.
std::auto_ptr<Stream> stream(FileSystem::open(path));
if (stream.get() == NULL || !stream->canRead())
{
GP_ERROR("Failed to load audio file %s.", path);
goto cleanup;
}
// Read the file header
char header[12];
if (stream->read(header, 1, 12) != 12)
{
GP_ERROR("Invalid header for audio file %s.", path);
goto cleanup;
}
// Check the file format
if (memcmp(header, "RIFF", 4) == 0)
{
if (!AudioBuffer::loadWav(stream.get(), alBuffer))
{
GP_ERROR("Invalid wave file: %s", path);
goto cleanup;
}
}
else if (memcmp(header, "OggS", 4) == 0)
{
if (!AudioBuffer::loadOgg(stream.get(), alBuffer))
{
GP_ERROR("Invalid ogg file: %s", path);
goto cleanup;
}
}
else
{
GP_ERROR("Unsupported audio file: %s", path);
goto cleanup;
}
buffer = new AudioBuffer(path, alBuffer);
// Add the buffer to the cache.
__buffers.push_back(buffer);
return buffer;
cleanup:
if (alBuffer)
AL_CHECK( alDeleteBuffers(1, &alBuffer) );
return NULL;
}
AudioBuffer* AudioBuffer::create(const char* path, bool streamed)
{
GP_ASSERT(path);
AudioBuffer* buffer = NULL;
if (!streamed)
{
unsigned int bufferCount = (unsigned int)__buffers.size();
for (unsigned int i = 0; i < bufferCount; i++)
{
buffer = __buffers[i];
GP_ASSERT(buffer);
if (buffer->_filePath.compare(path) == 0)
{
buffer->addRef();
return buffer;
}
}
}
ALuint alBuffer[STREAMING_BUFFER_QUEUE_SIZE];
memset(alBuffer, 0, sizeof(alBuffer));
// Create 1 buffer for non-streamed sounds or full queue for streamed ones.
unsigned int queueSize = streamed ? STREAMING_BUFFER_QUEUE_SIZE : 1;
for (unsigned int i = 0; i < queueSize; i++)
{
// Load audio data into a buffer.
AL_CHECK(alGenBuffers(1, &alBuffer[i]));
if (AL_LAST_ERROR())
{
GP_ERROR("Failed to create OpenAL buffer; alGenBuffers error: %d", AL_LAST_ERROR());
AL_CHECK(alDeleteBuffers(1, &alBuffer[i]));
return NULL;
}
}
std::unique_ptr<AudioStreamStateWav> streamStateWav;
std::unique_ptr<AudioStreamStateOgg> streamStateOgg;
// Load sound file.
std::unique_ptr<Stream> stream(FileSystem::open(path));
if (stream.get() == NULL || !stream->canRead())
{
GP_ERROR("Failed to load audio file %s.", path);
goto cleanup;
}
// Read the file header
char header[12];
if (stream->read(header, 1, 12) != 12)
{
GP_ERROR("Invalid header for audio file %s.", path);
goto cleanup;
}
// Check the file format
if (memcmp(header, "RIFF", 4) == 0)
{
// Fill at least one buffer with sound data.
streamStateWav.reset(new AudioStreamStateWav());
if (!AudioBuffer::loadWav(stream.get(), alBuffer[0], streamed, streamStateWav.get()))
{
GP_ERROR("Invalid wave file: %s", path);
goto cleanup;
}
}
else if (memcmp(header, "OggS", 4) == 0)
{
// Fill at least one buffer with sound data.
streamStateOgg.reset(new AudioStreamStateOgg());
if (!AudioBuffer::loadOgg(stream.get(), alBuffer[0], streamed, streamStateOgg.get()))
{
GP_ERROR("Invalid ogg file: %s", path);
goto cleanup;
}
}
else
{
GP_ERROR("Unsupported audio file: %s", path);
goto cleanup;
}
buffer = new AudioBuffer(path, alBuffer, streamed);
buffer->_fileStream.reset(stream.release());
buffer->_streamStateWav.reset(streamStateWav.release());
buffer->_streamStateOgg.reset(streamStateOgg.release());
if (buffer->_streamStateWav.get())
buffer->_buffersNeededCount = (buffer->_streamStateWav->dataSize + STREAMING_BUFFER_SIZE - 1) / STREAMING_BUFFER_SIZE;
else if (buffer->_streamStateOgg.get())
buffer->_buffersNeededCount = (buffer->_streamStateOgg->dataSize + STREAMING_BUFFER_SIZE - 1) / STREAMING_BUFFER_SIZE;
if (!streamed)
__buffers.push_back(buffer);
return buffer;
cleanup:
for (unsigned int i = 0; i < STREAMING_BUFFER_QUEUE_SIZE; i++)
{
if (alBuffer[i])
AL_CHECK(alDeleteBuffers(1, &alBuffer[i]));
}
return NULL;
}
