multi_audio: Add multiple Audio In Feature, implement listed TODO

Signed-off-by: Jérôme Duval <[email protected]>

src/add-ons/media/media-add-ons/multi_audio/Jamfile

@@ -13,6 +13,7 @@ Addon hmulti_audio.media_addon :
 	MultiAudioDevice.cpp
 	MultiAudioNode.cpp
 	MultiAudioUtility.cpp
+	Resampler.cpp
 	TimeComputer.cpp
 	: be media $(TARGET_LIBSUPC++)
 ;

src/add-ons/media/media-add-ons/multi_audio/MultiAudioNode.cpp

@@ -24,12 +24,14 @@
 #	define PRINTING
 #endif
 #include "debug.h"
+#include "Resampler.h"
 
 
 #define PARAMETER_ID_INPUT_FREQUENCY	1
 #define PARAMETER_ID_OUTPUT_FREQUENCY	2
 
 
+//This represent an hardware output
 class node_input {
 public:
 	node_input(media_input& input, media_format format);
@@ -39,12 +41,14 @@ public:
 	media_input			fInput;
 	media_format 		fPreferredFormat;
 	media_format		fFormat;
-	uint32 				fBufferCycle;
+	volatile uint32		fBufferCycle;
 	multi_buffer_info	fOldBufferInfo;
 	BBuffer*			fBuffer;
+	Resampler			*fResampler;
 };
 
 
+//This represent an hardware input
 class node_output {
 public:
 	node_output(media_output& output, media_format format);
@@ -60,6 +64,7 @@ public:
 	uint64 				fSamplesSent;
 	volatile uint32 	fBufferCycle;
 	multi_buffer_info	fOldBufferInfo;
+	Resampler			*fResampler;
 };
 
 
@@ -115,6 +120,7 @@ node_input::node_input(media_input& input, media_format format)
 	fPreferredFormat = format;
 	fBufferCycle = 1;
 	fBuffer = NULL;
+	fResampler = NULL;
 }
 
 
@@ -136,6 +142,7 @@ node_output::node_output(media_output& output, media_format format)
 	fOutput = output;
 	fPreferredFormat = format;
 	fBufferCycle = 1;
+	fResampler = NULL;
 }
 
 
@@ -351,6 +358,10 @@ MultiAudioNode::NodeRegistered()
 			currentInput = new node_input(*input, fOutputPreferredFormat);
 			currentInput->fPreferredFormat.u.raw_audio.channel_count = 1;
 			currentInput->fInput.format = currentInput->fPreferredFormat;
+			delete currentInput->fResampler;
+			currentInput->fResampler = new
+				Resampler(currentInput->fPreferredFormat.AudioFormat(),
+					fOutputPreferredFormat.AudioFormat());
 
 			currentInput->fChannelId = fDevice->Description().channels[i].channel_id;
 			fInputs.AddItem(currentInput);
@@ -397,6 +408,11 @@ MultiAudioNode::NodeRegistered()
 			currentOutput = new node_output(*output, fInputPreferredFormat);
 			currentOutput->fPreferredFormat.u.raw_audio.channel_count = 1;
 			currentOutput->fOutput.format = currentOutput->fPreferredFormat;
+			delete currentOutput->fResampler;
+			currentOutput->fResampler = new
+				Resampler(fInputPreferredFormat.AudioFormat(),
+					currentOutput->fPreferredFormat.AudioFormat());
+
 			currentOutput->fChannelId = fDevice->Description().channels[i].channel_id;
 			fOutputs.AddItem(currentOutput);
 
@@ -1725,8 +1741,6 @@ MultiAudioNode::_OutputThread()
 	CALLED();
 	multi_buffer_info bufferInfo;
 	bufferInfo.info_size = sizeof(multi_buffer_info);
-	bufferInfo._reserved_0 = 0;
-	bufferInfo._reserved_1 = 2;
 	bufferInfo.playback_buffer_cycle = 0;
 	bufferInfo.record_buffer_cycle = 0;
 
@@ -1758,8 +1772,7 @@ MultiAudioNode::_OutputThread()
 		for (int32 i = 0; i < fInputs.CountItems(); i++) {
 			node_input* input = (node_input*)fInputs.ItemAt(i);
 
-			if (bufferInfo._reserved_0 == input->fChannelId
+			if (bufferInfo.playback_buffer_cycle >= 0
-				&& bufferInfo.playback_buffer_cycle >= 0
 				&& bufferInfo.playback_buffer_cycle
 						< fDevice->BufferList().return_playback_buffers
 				&& (input->fOldBufferInfo.playback_buffer_cycle
@@ -1814,8 +1827,7 @@ MultiAudioNode::_OutputThread()
 			// buffer
 			if (RunState() == BMediaEventLooper::B_STARTED
 				&& output->fOutput.destination != media_destination::null) {
-				if (bufferInfo._reserved_1 == output->fChannelId
+				if (bufferInfo.record_buffer_cycle >= 0
-					&& bufferInfo.record_buffer_cycle >= 0
 					&& bufferInfo.record_buffer_cycle
 							< fDevice->BufferList().return_record_buffers
 					&& (output->fOldBufferInfo.record_buffer_cycle
@@ -1823,6 +1835,8 @@ MultiAudioNode::_OutputThread()
 						|| fDevice->BufferList().return_record_buffers == 1)) {
 					//PRINT(("record_buffer_cycle ok\n"));
 
+					output->fBufferCycle = bufferInfo.record_buffer_cycle;
+
 					// Get the next buffer of data
 					BBuffer* buffer = _FillNextBuffer(bufferInfo, *output);
 					if (buffer != NULL) {
@@ -1889,6 +1903,17 @@ MultiAudioNode::_WriteZeros(node_input& input, uint32 bufferCycle)
 			}
 			break;
 
+		case media_raw_audio_format::B_AUDIO_DOUBLE:
+			for (uint32 channel = 0; channel < channelCount; channel++) {
+				char* dest = _PlaybackBuffer(bufferCycle,
+					input.fChannelId + channel);
+				for (uint32 i = bufferSize; i > 0; i--) {
+					*(double*)dest = 0;
+					dest += stride;
+				}
+			}
+			break;
+
 		case media_raw_audio_format::B_AUDIO_INT:
 			for (uint32 channel = 0; channel < channelCount; channel++) {
 				char* dest = _PlaybackBuffer(bufferCycle,
@@ -1911,6 +1936,28 @@ MultiAudioNode::_WriteZeros(node_input& input, uint32 bufferCycle)
 			}
 			break;
 
+		case media_raw_audio_format::B_AUDIO_UCHAR:
+			for (uint32 channel = 0; channel < channelCount; channel++) {
+				char* dest = _PlaybackBuffer(bufferCycle,
+					input.fChannelId + channel);
+				for (uint32 i = bufferSize; i > 0; i--) {
+					*(uint8*)dest = 128;
+					dest += stride;
+				}
+			}
+			break;
+
+		case media_raw_audio_format::B_AUDIO_CHAR:
+			for (uint32 channel = 0; channel < channelCount; channel++) {
+				char* dest = _PlaybackBuffer(bufferCycle,
+					input.fChannelId + channel);
+				for (uint32 i = bufferSize; i > 0; i--) {
+					*(int8*)dest = 0;
+					dest += stride;
+				}
+			}
+			break;
+
 		default:
 			fprintf(stderr, "ERROR in WriteZeros format not handled\n");
 	}
@@ -1929,219 +1976,36 @@ MultiAudioNode::_FillWithZeros(node_input& input)
 void
 MultiAudioNode::_FillNextBuffer(node_input& input, BBuffer* buffer)
 {
-	// TODO: simplify this, or put it into a static function to remove
+	uint32 channelCount = input.fInput.format.u.raw_audio.channel_count;
-	// the need for checking all over again
+	size_t inputSampleSize = input.fInput.format.u.raw_audio.format
+			& media_raw_audio_format::B_AUDIO_SIZE_MASK;
 
 	uint32 bufferSize = fDevice->BufferList().return_playback_buffer_size;
 
-	if (buffer->SizeUsed()
+	if (buffer->SizeUsed() / inputSampleSize / channelCount != bufferSize) {
-		/ (input.fInput.format.u.raw_audio.format
-			& media_raw_audio_format::B_AUDIO_SIZE_MASK)
-		/ input.fInput.format.u.raw_audio.channel_count != bufferSize) {
 		_WriteZeros(input, input.fBufferCycle);
 		return;
 	}
 
-	switch (input.fInput.format.u.raw_audio.format) {
+	if (channelCount != input.fFormat.u.raw_audio.channel_count) {
-		case media_raw_audio_format::B_AUDIO_FLOAT:
+		PRINT(("Channel count is different"));
-			switch (input.fFormat.u.raw_audio.format) {
+		return;
-				case media_raw_audio_format::B_AUDIO_FLOAT:
+	}
-				{
+
-					size_t frameSize = input.fInput.format.u.raw_audio
+	if (input.fResampler != NULL) {
-						.channel_count * sizeof(float);
+		size_t srcStride = channelCount * inputSampleSize;
-					size_t stride = _PlaybackStride(input.fBufferCycle,
+
-						input.fChannelId);
+		for (uint32 channel = 0; channel < channelCount; channel++) {
-					//PRINT(("stride : %i, frame_size : %i, return_playback_buffer_size : %i\n", stride, frame_size, fDevice->BufferList().return_playback_buffer_size));
+			char* src = (char*)buffer->Data() + channel * inputSampleSize;
-					for (uint32 channel = 0; channel
+			char* dst = _PlaybackBuffer(input.fBufferCycle,
-							< input.fInput.format.u.raw_audio.channel_count;
-							channel++) {
-						char* dest = _PlaybackBuffer(input.fBufferCycle,
 							input.fChannelId + channel);
-						char* src = (char*)buffer->Data()
+			size_t dstStride = _PlaybackStride(input.fBufferCycle,
-							+ channel * sizeof(float);
-
-						for (uint32 i = bufferSize; i > 0; i--) {
-							*(float *)dest = *(float *)src;
-							dest += stride;
-							src += frameSize;
-						}
-					}
-					break;
-				}
-
-				case media_raw_audio_format::B_AUDIO_SHORT:
-					if (input.fInput.format.u.raw_audio.channel_count == 2) {
-						int16* dest1 = (int16*)_PlaybackBuffer(
-							input.fBufferCycle, input.fChannelId);
-						int16* dest2 = (int16*)_PlaybackBuffer(
-							input.fBufferCycle, input.fChannelId + 1);
-						float* src = (float*)buffer->Data();
-						if (_PlaybackStride(input.fBufferCycle,
-									input.fChannelId) == sizeof(int16)
-							&& _PlaybackStride(input.fBufferCycle,
-									input.fChannelId + 1) == sizeof(int16)) {
-							//PRINT(("FillNextBuffer : 2 channels strides 2\n"));
-							for (uint32 i = bufferSize; i > 0; i--) {
-								*dest1++ = int16(32767 * *src++);
-								*dest2++ = int16(32767 * *src++);
-							}
-						} else if (_PlaybackStride(input.fBufferCycle,
-									input.fChannelId) == 2 * sizeof(int16)
-							&& _PlaybackStride(input.fBufferCycle,
-									input.fChannelId + 1) == 2 * sizeof(int16)
-							&& dest1 + 1 == dest2) {
-							//PRINT(("FillNextBuffer : 2 channels strides 4\n"));
-							for (uint32 i = 2 * bufferSize; i > 0; i--)
-								*dest1++ = int16(32767 * *src++);
-						} else {
-							//PRINT(("FillNextBuffer : 2 channels strides != 2\n"));
-							size_t stride1 = _PlaybackStride(input.fBufferCycle,
-								input.fChannelId) / sizeof(int16);
-							size_t stride2 = _PlaybackStride(input.fBufferCycle,
-								input.fChannelId + 1) / sizeof(int16);
-							for (uint32 i = bufferSize; i > 0; i--) {
-								*dest1 = int16(32767 * *src++);
-								*dest2 = int16(32767 * *src++);
-								dest1 += stride1;
-								dest2 += stride2;
-							}
-						}
-					} else {
-						size_t frameSize = input.fInput.format.u
-							.raw_audio.channel_count * sizeof(int16);
-						size_t stride = _PlaybackStride(input.fBufferCycle,
-							input.fChannelId);
-						//PRINT(("stride : %i, frame_size : %i, return_playback_buffer_size : %i\n", stride, frame_size, fDevice->BufferList().return_playback_buffer_size));
-						for (uint32 channel = 0; channel <
-								input.fInput.format.u.raw_audio.channel_count;
-								channel++) {
-							char* dest = _PlaybackBuffer(input.fBufferCycle,
 							input.fChannelId + channel);
-							char* src = (char*)buffer->Data()
-								+ channel * sizeof(int16);
 
-							for (uint32 i = bufferSize; i > 0; i--) {
+			input.fResampler->Resample(src, srcStride,
-								*(int16*)dest = int16(32767 * *(float*)src);
+				dst, dstStride, bufferSize);
-								dest += stride;
-								src += frameSize;
 		}
 	}
-					}
-					break;
-
-				case media_raw_audio_format::B_AUDIO_INT:
-				default:
-					break;
-			}
-			break;
-
-		case media_raw_audio_format::B_AUDIO_INT:
-			switch (input.fFormat.u.raw_audio.format) {
-				case media_raw_audio_format::B_AUDIO_INT:
-				{
-					size_t frameSize = input.fInput.format.u.raw_audio
-						.channel_count * sizeof(int32);
-					size_t stride = _PlaybackStride(input.fBufferCycle,
-						input.fChannelId);
-					//PRINT(("stride : %i, frame_size : %i, return_playback_buffer_size : %i\n", stride, frame_size, fDevice->BufferList().return_playback_buffer_size));
-					for (uint32 channel = 0; channel
-							< input.fInput.format.u.raw_audio.channel_count;
-							channel++) {
-						char* dest = _PlaybackBuffer(input.fBufferCycle,
-							input.fChannelId + channel);
-						char* src = (char*)buffer->Data()
-							+ channel * sizeof(int32);
-
-						for (uint32 i = bufferSize; i > 0; i--) {
-							*(int32 *)dest = *(int32 *)src;
-							dest += stride;
-							src += frameSize;
-						}
-					}
-					break;
-				}
-				case media_raw_audio_format::B_AUDIO_SHORT:
-				case media_raw_audio_format::B_AUDIO_FLOAT:
-				default:
-					break;
-			}
-			break;
-
-		case media_raw_audio_format::B_AUDIO_SHORT:
-			switch (input.fFormat.u.raw_audio.format) {
-				case media_raw_audio_format::B_AUDIO_SHORT:
-					if (input.fInput.format.u.raw_audio.channel_count == 2) {
-						int16* dest1 = (int16*)_PlaybackBuffer(
-							input.fBufferCycle, input.fChannelId);
-						int16* dest2 = (int16*)_PlaybackBuffer(
-							input.fBufferCycle, input.fChannelId + 1);
-						int16* src = (int16*)buffer->Data();
-						if (_PlaybackStride(input.fBufferCycle,
-								input.fChannelId) == sizeof(int16)
-							&& _PlaybackStride(input.fBufferCycle,
-								input.fChannelId + 1) == sizeof(int16)) {
-							//PRINT(("FillNextBuffer : 2 channels strides 2\n"));
-							for (uint32 i = bufferSize; i > 0; i--) {
-								*dest1++ = *src++;
-								*dest2++ = *src++;
-							}
-						} else if (_PlaybackStride(input.fBufferCycle,
-								input.fChannelId) == 2 * sizeof(int16)
-							&& _PlaybackStride(input.fBufferCycle,
-								input.fChannelId + 1) == 2 * sizeof(int16)
-							&& dest1 + 1 == dest2) {
-								//PRINT(("FillNextBuffer : 2 channels strides 4\n"));
-								memcpy(dest1, src,
-									bufferSize * 2 * sizeof(int16));
-							} else {
-								//PRINT(("FillNextBuffer : 2 channels strides != 2\n"));
-								size_t stride1 = _PlaybackStride(
-									input.fBufferCycle, input.fChannelId) / 2;
-								size_t stride2 = _PlaybackStride(
-									input.fBufferCycle, input.fChannelId + 1)
-									/ 2;
-
-								for (uint32 i = bufferSize; i > 0; i--) {
-									*dest1 = *src++;
-									*dest2 = *src++;
-									dest1 += stride1;
-									dest2 += stride2;
-								}
-							}
-					} else {
-						size_t frameSize = input.fInput.format.u
-							.raw_audio.channel_count * sizeof(int16);
-						size_t stride = _PlaybackStride(input.fBufferCycle,
-							input.fChannelId);
-						//PRINT(("stride : %i, frame_size : %i, return_playback_buffer_size : %i\n", stride, frame_size, fDevice->BufferList().return_playback_buffer_size));
-						for (uint32 channel = 0; channel
-								< input.fInput.format.u.raw_audio.channel_count;
-								channel++) {
-							char* dest = _PlaybackBuffer(input.fBufferCycle,
-								input.fChannelId + channel);
-							char* src = (char*)buffer->Data()
-								+ channel * sizeof(int16);
-
-							for (uint32 i = bufferSize; i > 0; i--) {
-								*(int16*)dest = *(int16*)src;
-								dest += stride;
-								src += frameSize;
-							}
-						}
-					}
-					break;
-
-				case media_raw_audio_format::B_AUDIO_FLOAT:
-				case media_raw_audio_format::B_AUDIO_INT:
-				default:
-					break;
-			}
-			break;
-
-		case media_raw_audio_format::B_AUDIO_UCHAR:
-		default:
-			break;
-	}
 }
 
 
@@ -2219,7 +2083,7 @@ MultiAudioNode::_UpdateTimeSource(multi_buffer_info& info,
 
 
 BBuffer*
-MultiAudioNode::_FillNextBuffer(multi_buffer_info &info, node_output &channel)
+MultiAudioNode::_FillNextBuffer(multi_buffer_info &info, node_output &output)
 {
 	//CALLED();
 	// get a buffer from our buffer group
@@ -2227,15 +2091,16 @@ MultiAudioNode::_FillNextBuffer(multi_buffer_info &info, node_output &channel)
 	//PRINT(("MBI.record_buffer_cycle : %i\n", MBI.record_buffer_cycle));
 	//PRINT(("MBI.recorded_real_time : %i\n", MBI.recorded_real_time));
 	//PRINT(("MBI.recorded_frames_count : %i\n", MBI.recorded_frames_count));
-	if (!channel.fBufferGroup)
+	if (!output.fBufferGroup)
 		return NULL;
 
-	BBuffer* buffer = channel.fBufferGroup->RequestBuffer(
+	BBuffer* buffer = output.fBufferGroup->RequestBuffer(
-		channel.fOutput.format.u.raw_audio.buffer_size, BufferDuration());
+		output.fOutput.format.u.raw_audio.buffer_size, BufferDuration());
 	if (buffer == NULL) {
 		// If we fail to get a buffer (for example, if the request times out),
 		// we skip this buffer and go on to the next, to avoid locking up the
 		// control thread.
+		fprintf(stderr, "Buffer is null");
 		return NULL;
 	}
 
@@ -2246,17 +2111,34 @@ MultiAudioNode::_FillNextBuffer(multi_buffer_info &info, node_output &channel)
 	if (TimeSource() == NULL)
 		fprintf(stderr, "TimeSource() NULL\n");
 
-	// now fill it with data, continuing where the last buffer left off
+	uint32 channelCount = output.fOutput.format.u.raw_audio.channel_count;
-	memcpy(buffer->Data(),
+	size_t outputSampleSize = output.fOutput.format.u.raw_audio.format
-		fDevice->BufferList().record_buffers[info.record_buffer_cycle]
+		& media_raw_audio_format::B_AUDIO_SIZE_MASK;
-			[channel.fChannelId
+
-				- fDevice->Description().output_channel_count].base,
+	uint32 bufferSize = fDevice->BufferList().return_record_buffer_size;
-		channel.fOutput.format.u.raw_audio.buffer_size);
+
+	if (output.fResampler != NULL) {
+		size_t dstStride = channelCount * outputSampleSize;
+
+		uint32 channelId = output.fChannelId
+			- fDevice->Description().output_channel_count;
+
+		for (uint32 channel = 0; channel < channelCount; channel++) {
+			char* src = _RecordBuffer(output.fBufferCycle,
+									channelId + channel);
+			size_t srcStride = _RecordStride(output.fBufferCycle,
+									channelId + channel);
+			char* dst = (char*)buffer->Data() + channel * outputSampleSize;
+
+			output.fResampler->Resample(src, srcStride, dst, dstStride,
+				bufferSize);
+		}
+	}
 
 	// fill in the buffer header
 	media_header* header = buffer->Header();
 	header->type = B_MEDIA_RAW_AUDIO;
-	header->size_used = channel.fOutput.format.u.raw_audio.buffer_size;
+	header->size_used = output.fOutput.format.u.raw_audio.buffer_size;
 	header->time_source = TimeSource()->ID();
 	header->start_time = PerformanceTimeFor(info.recorded_real_time);
 

src/add-ons/media/media-add-ons/multi_audio/MultiAudioNode.h

@@ -166,6 +166,13 @@ private:
 								{ return fDevice->BufferList().playback_buffers
 									[cycle][channel].stride; }
 
+			char*			_RecordBuffer(int32 cycle, int32 channel)
+								{ return fDevice->BufferList().record_buffers
+									[cycle][channel].base; }
+			uint32			_RecordStride(int32 cycle, int32 channel)
+								{ return fDevice->BufferList().record_buffers
+									[cycle][channel].stride; }
+
 			void			_WriteZeros(node_input& input, uint32 bufferCycle);
 			void			_FillWithZeros(node_input& input);
 			void			_FillNextBuffer(node_input& channel,
@@ -178,7 +185,7 @@ private:
 
 			void 			_AllocateBuffers(node_output& channel);
 			BBuffer* 		_FillNextBuffer(multi_buffer_info& info,
-								node_output& channel);
+								node_output& output);
 			void			_UpdateTimeSource(multi_buffer_info& info,
 								multi_buffer_info& oldInfo, node_input& input);
 

src/add-ons/media/media-add-ons/multi_audio/Resampler.cpp

@@ -0,0 +1,645 @@
+/*
+ * Copyright 2012 Jérôme Leveque
+ * Copyright 2012 Jérôme Duval
+ * Copyright 2003 Marcus Overhagen
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "Resampler.h"
+#include "MultiAudioUtility.h"
+#include "debug.h"
+
+
+/*!	A simple resampling class for the multi_audio add-ons.
+	You pick the conversion function on object creation,
+	and then call the Resample() function, specifying data pointer,
+	offset (in bytes) to the next sample, and count of samples.
+*/
+
+
+Resampler::Resampler(uint32 sourceFormat, uint32 destFormat)
+	:
+	fFunc(NULL)
+{
+	PRINT(("Resampler() in 0x%x, out 0x%x\n", (unsigned int)sourceFormat,
+		(unsigned int)destFormat));
+
+	switch (sourceFormat) {
+		case media_raw_audio_format::B_AUDIO_FLOAT:
+			switch (destFormat) {
+				case media_raw_audio_format::B_AUDIO_FLOAT:
+					fFunc = &Resampler::_CopyType2Type<float>;
+					break;
+				case media_raw_audio_format::B_AUDIO_DOUBLE:
+					fFunc = &Resampler::_CopyFloat2Double;
+					break;
+				case media_raw_audio_format::B_AUDIO_INT:
+					fFunc = &Resampler::_CopyFloat2Int;
+					break;
+				case media_raw_audio_format::B_AUDIO_SHORT:
+					fFunc = &Resampler::_CopyFloat2Short;
+					break;
+				case media_raw_audio_format::B_AUDIO_UCHAR:
+					fFunc = &Resampler::_CopyFloat2UChar;
+					break;
+				case media_raw_audio_format::B_AUDIO_CHAR:
+					fFunc = &Resampler::_CopyFloat2Char;
+					break;
+			}
+			break;
+
+		case media_raw_audio_format::B_AUDIO_DOUBLE:
+			switch (destFormat) {
+				case media_raw_audio_format::B_AUDIO_FLOAT:
+					fFunc = &Resampler::_CopyDouble2Float;
+					break;
+				case media_raw_audio_format::B_AUDIO_DOUBLE:
+					fFunc = &Resampler::_CopyType2Type<double>;
+					break;
+				case media_raw_audio_format::B_AUDIO_INT:
+					fFunc = &Resampler::_CopyDouble2Int;
+					break;
+				case media_raw_audio_format::B_AUDIO_SHORT:
+					fFunc = &Resampler::_CopyDouble2Short;
+					break;
+				case media_raw_audio_format::B_AUDIO_UCHAR:
+					fFunc = &Resampler::_CopyDouble2UChar;
+					break;
+				case media_raw_audio_format::B_AUDIO_CHAR:
+					fFunc = &Resampler::_CopyDouble2Char;
+					break;
+			}
+			break;
+
+		case media_raw_audio_format::B_AUDIO_INT:
+			switch (destFormat) {
+				case media_raw_audio_format::B_AUDIO_FLOAT:
+					fFunc = &Resampler::_CopyInt2Float;
+					break;
+				case media_raw_audio_format::B_AUDIO_DOUBLE:
+					fFunc = &Resampler::_CopyInt2Double;
+					break;
+				case media_raw_audio_format::B_AUDIO_INT:
+					fFunc = &Resampler::_CopyType2Type<int32>;
+					break;
+				case media_raw_audio_format::B_AUDIO_SHORT:
+					fFunc = &Resampler::_CopyInt2Short;
+					break;
+				case media_raw_audio_format::B_AUDIO_UCHAR:
+					fFunc = &Resampler::_CopyInt2UChar;
+					break;
+				case media_raw_audio_format::B_AUDIO_CHAR:
+					fFunc = &Resampler::_CopyInt2Char;
+					break;
+			}
+			break;
+
+		case media_raw_audio_format::B_AUDIO_SHORT:
+			switch (destFormat) {
+				case media_raw_audio_format::B_AUDIO_FLOAT:
+					fFunc = &Resampler::_CopyShort2Float;
+					break;
+				case media_raw_audio_format::B_AUDIO_DOUBLE:
+					fFunc = &Resampler::_CopyShort2Double;
+					break;
+				case media_raw_audio_format::B_AUDIO_INT:
+					fFunc = &Resampler::_CopyShort2Int;
+					break;
+				case media_raw_audio_format::B_AUDIO_SHORT:
+					fFunc = &Resampler::_CopyType2Type<int16>;
+					break;
+				case media_raw_audio_format::B_AUDIO_UCHAR:
+					fFunc = &Resampler::_CopyShort2UChar;
+					break;
+				case media_raw_audio_format::B_AUDIO_CHAR:
+					fFunc = &Resampler::_CopyShort2Char;
+					break;
+			}
+			break;
+
+		case media_raw_audio_format::B_AUDIO_UCHAR:
+			switch (destFormat) {
+				case media_raw_audio_format::B_AUDIO_FLOAT:
+					fFunc = &Resampler::_CopyUChar2Float;
+					break;
+				case media_raw_audio_format::B_AUDIO_DOUBLE:
+					fFunc = &Resampler::_CopyUChar2Double;
+					break;
+				case media_raw_audio_format::B_AUDIO_INT:
+					fFunc = &Resampler::_CopyUChar2Int;
+					break;
+				case media_raw_audio_format::B_AUDIO_SHORT:
+					fFunc = &Resampler::_CopyUChar2Short;
+					break;
+				case media_raw_audio_format::B_AUDIO_UCHAR:
+					fFunc = &Resampler::_CopyType2Type<uint8>;
+					break;
+				case media_raw_audio_format::B_AUDIO_CHAR:
+					fFunc = &Resampler::_CopyUChar2Char;
+					break;
+			}
+			break;
+
+		case media_raw_audio_format::B_AUDIO_CHAR:
+			switch (destFormat) {
+				case media_raw_audio_format::B_AUDIO_FLOAT:
+					fFunc = &Resampler::_CopyChar2Float;
+					break;
+				case media_raw_audio_format::B_AUDIO_DOUBLE:
+					fFunc = &Resampler::_CopyChar2Double;
+					break;
+				case media_raw_audio_format::B_AUDIO_INT:
+					fFunc = &Resampler::_CopyChar2Int;
+					break;
+				case media_raw_audio_format::B_AUDIO_SHORT:
+					fFunc = &Resampler::_CopyChar2Short;
+					break;
+				case media_raw_audio_format::B_AUDIO_UCHAR:
+					fFunc = &Resampler::_CopyChar2UChar;
+					break;
+				case media_raw_audio_format::B_AUDIO_CHAR:
+					fFunc = &Resampler::_CopyType2Type<int8>;
+					break;
+			}
+			break;
+	}
+}
+
+
+Resampler::~Resampler()
+{
+}
+
+
+status_t
+Resampler::InitCheck() const
+{
+	return fFunc != NULL ? B_OK : B_ERROR;
+}
+
+
+template<typename T>
+void
+Resampler::_CopyType2Type(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(T*)outputData = *(const T*)inputData;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyFloat2Double(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(double*)outputData = *(const float*)inputData;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyFloat2Int(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int32*)outputData = (int32)(*(const float*)inputData * 2147483647.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+void
+Resampler::_CopyFloat2Short(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int16*)outputData = (int16)(*(const float*)inputData * 32767.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyFloat2UChar(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(uint8*)outputData = (uint8)(128.0f + *(const float*)inputData * 127.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyFloat2Char(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int8*)outputData = (int8)(*(const float*)inputData * 127.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyDouble2Float(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(float*)outputData = *(const double*)inputData;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyDouble2Int(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int32*)outputData = (int32)(*(const double*)inputData * 2147483647.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyDouble2Short(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int16*)outputData = (int16)(*(const double*)inputData * 32767.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyDouble2UChar(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(uint8*)outputData = (uint8)(128.0f + *(const double*)inputData * 127.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyDouble2Char(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int8*)outputData = (int8)(*(const double*)inputData * 127.0f);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyShort2Float(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(float*)outputData = *(const int16*)inputData / 32767.0f;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyShort2Double(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(double*)outputData = *(const int16*)inputData / 32767.0;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyShort2Int(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int32*)outputData = (int32)*(const int16*)inputData << 16;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyShort2UChar(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(uint8*)outputData = 128 + (*(const int16*)inputData >> 8);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyShort2Char(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int8*)outputData = *(const int16*)inputData >> 8;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyInt2Float(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(float*)outputData = *(const int32*)inputData / 2147483647.0f;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyInt2Double(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(double*)outputData = *(const int32*)inputData / 2147483647.0;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyInt2Short(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int16*)outputData = *(const int32*)inputData >> 16;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyInt2UChar(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(uint8*)outputData = 128 + (*(const int32*)inputData >> 24);
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyInt2Char(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(uint8*)outputData = *(const int32*)inputData >> 24;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyUChar2Float(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(float*)outputData = (*(const uint8*)inputData - 128) / 127.0f;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyUChar2Double(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(double*)outputData = (*(const uint8*)inputData - 128) / 127.0;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyUChar2Short(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int16*)outputData = (int16)(*(const uint8*)inputData - 128) << 8;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyUChar2Int(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int32*)outputData = (int32)(*(const uint8*)inputData - 128) << 24;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyUChar2Char(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int8*)outputData = *(const uint8*)inputData - 128;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyChar2Float(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(float*)outputData = *(const int8*)inputData / 127.0f;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyChar2Double(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(double*)outputData = *(const int8*)inputData / 127.0;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyChar2Short(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int16*)outputData = ((int16)*(const int8*)inputData) << 8;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyChar2Int(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(int32*)outputData = ((int16)*(const int8*)inputData) << 24;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+
+
+void
+Resampler::_CopyChar2UChar(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	while (sampleCount > 0) {
+		*(uint8*)outputData = *(const int8*)inputData + 128;
+
+		outputData = (void*)((uint8*)outputData + outputStride);
+		inputData = (void*)((uint8*)inputData + inputStride);
+
+		sampleCount--;
+	}
+}
+

src/add-ons/media/media-add-ons/multi_audio/Resampler.h

@@ -0,0 +1,145 @@
+/*
+ * Copyright 2012 Jérôme Leveque
+ * Copyright 2003 Marcus Overhagen
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _MULTI_AUDIO_RESAMPLER_H
+#define _MULTI_AUDIO_RESAMPLER_H
+
+
+#include <MediaDefs.h>
+
+
+class Resampler {
+public:
+								Resampler(uint32 sourceFormat,
+									uint32 destFormat);
+
+	virtual						~Resampler();
+
+			status_t			InitCheck() const;
+
+			void				Resample(const void *inputData,
+									uint32 inputStride, void *outputData,
+									uint32 outputStride, uint32 sampleCount);
+
+protected:
+	//static functions for converting datas
+	template<typename T> void _CopyType2Type(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyFloat2Double(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyFloat2Short(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyFloat2Int(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyFloat2UChar(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyFloat2Char(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+
+	virtual  void			_CopyDouble2Float(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyDouble2Short(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyDouble2Int(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyDouble2UChar(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyDouble2Char(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+
+	virtual  void			_CopyInt2Float(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyInt2Double(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyInt2Short(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyInt2UChar(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyInt2Char(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+
+	virtual  void			_CopyShort2Float(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyShort2Double(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyShort2Int(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyShort2UChar(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyShort2Char(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+
+	virtual  void			_CopyUChar2Float(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyUChar2Double(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyUChar2Short(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyUChar2Int(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyUChar2Char(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+
+	virtual  void			_CopyChar2Float(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyChar2Double(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyChar2Short(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyChar2Int(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+	virtual  void			_CopyChar2UChar(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+
+private:
+			void			(Resampler::*fFunc)(const void *inputData,
+								uint32 inputStride, void *outputData,
+								uint32 outputStride, uint32 sampleCount);
+};
+
+
+inline void
+Resampler::Resample(const void *inputData, uint32 inputStride,
+	void *outputData, uint32 outputStride, uint32 sampleCount)
+{
+	if (this->InitCheck() != B_OK)
+		return;
+	(this->*fFunc)(inputData, inputStride, outputData, outputStride,
+		sampleCount);
+}
+
+
+#endif // _MULTI_AUDIO_RESAMPLER_H