Fix export, which has been broken since the boost::signals2 changes. Also update Audiographer, bacause of its incomplete sndfile handling. Audiographer is equal to revision 74

git-svn-id: svn://localhost/ardour2/branches/3.0@6760 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 95 insertions, 0 deletions

diff --git a/libs/audiographer/audiographer/general/normalizer.h b/libs/audiographer/audiographer/general/normalizer.h
new file mode 100644
index 0000000000..205f6e70e5
--- /dev/null
+++ b/libs/audiographer/audiographer/general/normalizer.h
@@ -0,0 +1,95 @@
+#ifndef AUDIOGRAPHER_NORMALIZER_H
+#define AUDIOGRAPHER_NORMALIZER_H
+
+#include "audiographer/sink.h"
+#include "audiographer/routines.h"
+#include "audiographer/utils/listed_source.h"
+
+#include <cstring>
+
+namespace AudioGrapher
+{
+
+/// A class for normalizing to a specified target in dB
+class Normalizer
+  : public ListedSource<float>
+  , public Sink<float>
+  , public Throwing<>
+{
+  public:
+	/// Constructs a normalizer with a specific target in dB \n RT safe
+	Normalizer (float target_dB)
+	  : enabled (false)
+	  , buffer (0)
+	  , buffer_size (0)
+	{
+		target = pow (10.0f, target_dB * 0.05f);
+	}
+	
+	~Normalizer()
+	{
+		delete [] buffer;
+	}
+
+	/// Sets the peak found in the material to be normalized \see PeakReader \n RT safe
+	void set_peak (float peak)
+	{
+		if (peak == 0.0f || peak == target) {
+			/* don't even try */
+			enabled = false;
+		} else {
+			enabled = true;
+			gain = target / peak;
+		}
+	}
+
+	/** Allocates a buffer for using with const ProcessContexts
+	  * This function does not need to be called if
+	  * non-const ProcessContexts are given to \a process() .
+	  * \n Not RT safe
+	  */
+	void alloc_buffer(nframes_t frames)
+	{
+		delete [] buffer;
+		buffer = new float[frames];
+		buffer_size = frames;
+	}
+
+	/// Process a const ProcessContext \see alloc_buffer() \n RT safe
+	void process (ProcessContext<float> const & c)
+	{
+		if (throw_level (ThrowProcess) && c.frames() > buffer_size) {
+			throw Exception (*this, "Too many frames given to process()");
+		}
+		
+		if (enabled) {
+			memcpy (buffer, c.data(), c.frames() * sizeof(float));
+			Routines::apply_gain_to_buffer (buffer, c.frames(), gain);
+		}
+		
+		ProcessContext<float> c_out (c, buffer);
+		ListedSource<float>::output (c_out);
+	}
+	
+	/// Process a non-const ProcsesContext in-place \n RT safe
+	void process (ProcessContext<float> & c)
+	{
+		if (enabled) {
+			Routines::apply_gain_to_buffer (c.data(), c.frames(), gain);
+		}
+		ListedSource<float>::output(c);
+	}
+	
+  private:
+	bool      enabled;
+	float     target;
+	float     gain;
+	
+	float *   buffer;
+	nframes_t buffer_size;
+};
+
+
+} // namespace
+
+#endif // AUDIOGRAPHER_NORMALIZER_H