Prepare to support audio encoders that only support specific bit-depths.

src/Config.h

@@ -30,7 +30,7 @@
 #define VER_LAMEXP_MINOR_LO					4
 #define VER_LAMEXP_TYPE						Alpha
 #define VER_LAMEXP_PATCH					11
-#define VER_LAMEXP_BUILD					822
+#define VER_LAMEXP_BUILD					823
 
 ///////////////////////////////////////////////////////////////////////////////
 // Tool versions (minimum expected versions!)

src/Encoder_AC3.cpp

@@ -179,7 +179,7 @@ QString AC3Encoder::extension(void)
 	return "ac3";
 }
 
-const unsigned int *AC3Encoder::requiresDownsample(void)
+const unsigned int *AC3Encoder::supportedSamplerates(void)
 {
 	static const unsigned int supportedRates[] = {48000, 44100, 32000, NULL};
 	return supportedRates;

src/Encoder_AC3.h

@@ -36,7 +36,7 @@ public:
 	virtual bool encode(const QString &sourceFile, const AudioFileModel &metaInfo, const QString &outputFile, volatile bool *abortFlag);
 	virtual bool isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion);
 	virtual QString extension(void);
-	virtual const unsigned int *requiresDownsample(void);
+	virtual const unsigned int *supportedSamplerates(void);
 
 	//Advanced options
 	virtual void setAudioCodingMode(int value);

src/Encoder_Abstract.cpp

@@ -53,7 +53,13 @@ bool AbstractEncoder::requiresDownmix(void)
 }
 
 // Does encoder require the input to be downsampled? (NULL-terminated array of supported sampling rates)
-const unsigned int *AbstractEncoder::requiresDownsample(void)
+const unsigned int *AbstractEncoder::supportedSamplerates(void)
+{
+	return NULL;
+}
+
+// What bitdepths does the encoder support as input? (NULL-terminated array of supported bits per sample)
+const unsigned int *AbstractEncoder::supportedBitdepths(void)
 {
 	return NULL;
 }

src/Encoder_Abstract.h

@@ -41,7 +41,8 @@ public:
 	virtual bool isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion) = 0;
 	virtual QString extension(void) = 0;
 	virtual bool requiresDownmix(void);
-	virtual const unsigned int *requiresDownsample(void);
+	virtual const unsigned int *supportedSamplerates(void);
+	virtual const unsigned int *supportedBitdepths(void);
 
 	//Common setter methods
 	void setBitrate(int bitrate);

src/Thread_Process.cpp

@@ -128,18 +128,6 @@ void ProcessThread::processFile()
 		return;
 	}
 
-	//Do we need to take care of downsampling the input?
-	if(m_encoder->requiresDownsample())
-	{
-		insertDownsampleFilter();
-	}
-
-	//Do we need Stereo downmix?
-	if(m_encoder->requiresDownmix())
-	{
-		insertDownmixFilter();
-	}
-
 	QString sourceFile = m_audioFile.filePath();
 
 	//Decode source file
@@ -173,6 +161,28 @@ void ProcessThread::processFile()
 		}
 	}
 
+	//Check audio properties
+	if(bSuccess)
+	{
+		//Do we need to take care of downsampling the input?
+		if(m_encoder->supportedSamplerates())
+		{
+			insertDownsampleFilter();
+		}
+
+		//Do we need to change the bits per sample of the input?
+		if(m_encoder->supportedBitdepths())
+		{
+			insertBitdepthFilter();
+		}
+
+		//Do we need Stereo downmix?
+		if(m_encoder->requiresDownmix())
+		{
+			insertDownmixFilter();
+		}
+	}
+
 	//Apply all audio filters
 	if(bSuccess)
 	{
@@ -370,7 +380,7 @@ void ProcessThread::insertDownsampleFilter(void)
 	//Now add the downsampling filter, if needed
 	if(applyDownsampling)
 	{
-		const unsigned int *supportedRates = m_encoder->requiresDownsample();
+		const unsigned int *supportedRates = m_encoder->supportedSamplerates();
 		const unsigned int inputRate = m_audioFile.formatAudioSamplerate();
 		unsigned int currentDiff = UINT_MAX, minimumDiff = UINT_MAX, bestRate = UINT_MAX;
 
@@ -393,6 +403,11 @@ void ProcessThread::insertDownsampleFilter(void)
 	}
 }
 
+void ProcessThread::insertBitdepthFilter(void)
+{
+	qFatal("ProcessThread::insertBitdepthFilter not implemented yet!");
+}
+
 void ProcessThread::insertDownmixFilter(void)
 {
 	bool applyDownmixing = true;

src/Thread_Process.h

@@ -70,6 +70,7 @@ private:
 	QString generateTempFileName(void);
 	void insertDownsampleFilter(void);
 	void insertDownmixFilter(void);
+	void insertBitdepthFilter(void);
 	
 	const QUuid m_jobId;
 	AudioFileModel m_audioFile;