now supports endian adjustment at the output

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3760 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/media/media-add-ons/mixer/MixerCore.cpp

@@ -508,14 +508,15 @@ MixerCore::MixThread()
 			}
 			PRINT(4, "send buffer, inframes %ld, outframes %ld\n", fMixBufferFrameCount, frames_per_buffer(fOutput->MediaOutput().format.u.raw_audio));
 			
-			// swap byte order if necessary
-
 			// fill in the buffer header
 			media_header* hdr = buf->Header();
 			hdr->type = B_MEDIA_RAW_AUDIO;
 			hdr->size_used = fOutput->MediaOutput().format.u.raw_audio.buffer_size;
 			hdr->time_source = fTimeSource->ID();
 			hdr->start_time = event_time;
+			
+			// swap byte order if necessary
+			fOutput->AdjustByteOrder(buf);
 		
 			// send the buffer
 			if (B_OK != fNode->SendBuffer(buf, fOutput->MediaOutput().destination)) {

src/add-ons/media/media-add-ons/mixer/MixerOutput.cpp

@@ -8,18 +8,21 @@ MixerOutput::MixerOutput(MixerCore *core, const media_output &output)
  :	fCore(core),
 	fOutput(output),
 	fOutputChannelCount(0),
-	fOutputChannelInfo(0)
+	fOutputChannelInfo(0),
+	fOutputByteSwap(0)
 {
 	fix_multiaudio_format(&fOutput.format.u.raw_audio);
 	PRINT_OUTPUT("MixerOutput::MixerOutput", fOutput);
 	PRINT_CHANNEL_MASK(fOutput.format);
 
 	UpdateOutputChannels();
+	UpdateByteOrderSwap();
 }
 
 MixerOutput::~MixerOutput()
 {
 	delete fOutputChannelInfo;
+	delete fOutputByteSwap;
 }
 
 media_output &
@@ -38,6 +41,23 @@ MixerOutput::ChangeFormat(const media_multi_audio_format &format)
 	PRINT_CHANNEL_MASK(fOutput.format);
 
 	UpdateOutputChannels();
+	UpdateByteOrderSwap();
+}
+
+void
+MixerOutput::UpdateByteOrderSwap()
+{
+	delete fOutputByteSwap;
+	fOutputByteSwap = 0;
+
+	// perhaps we need byte swapping
+	if (fOutput.format.u.raw_audio.byte_order != B_MEDIA_HOST_ENDIAN) {
+		if (	fOutput.format.u.raw_audio.format == media_raw_audio_format::B_AUDIO_FLOAT
+			 ||	fOutput.format.u.raw_audio.format == media_raw_audio_format::B_AUDIO_INT
+			 ||	fOutput.format.u.raw_audio.format == media_raw_audio_format::B_AUDIO_SHORT) {
+			fOutputByteSwap = new ByteSwap(fOutput.format.u.raw_audio.format);
+		}
+	}
 }
 
 void

src/add-ons/media/media-add-ons/mixer/MixerOutput.h

@@ -2,6 +2,8 @@
 #define _MIXER_OUTPUT_H
 
 #include "debug.h"
+#include "ByteSwap.h"
+#include <Buffer.h>
 
 #define MAX_SOURCES 20
 
@@ -31,8 +33,10 @@ public:
 
 	// only for use by MixerCore
 	void GetMixerChannelInfo(int channel, int index, int *type, float *gain);
+	void AdjustByteOrder(BBuffer *buffer);
 
 private:
+	void UpdateByteOrderSwap();
 	void UpdateOutputChannels();
 	void AssignDefaultSources();
 	
@@ -50,6 +54,7 @@ private:
 	
 	uint32				fOutputChannelCount;
 	output_chan_info 	*fOutputChannelInfo; //array
+	ByteSwap			*fOutputByteSwap;
 };
 
 inline uint32 MixerOutput::GetOutputChannelCount()
@@ -79,4 +84,10 @@ inline void MixerOutput::GetMixerChannelInfo(int channel, int index, int *type,
 	*gain = fOutputChannelInfo[channel].source_gain[index];
 }
 
+inline void MixerOutput::AdjustByteOrder(BBuffer *buffer)
+{
+	if (fOutputByteSwap)
+		fOutputByteSwap->Swap(buffer->Data(), buffer->SizeUsed());
+}
+
 #endif