From 997e4b1f9cd7ccfc704b7c035051da7f60d831e7 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 17 Mar 2008 20:54:03 +0000
Subject: merge with 2.0-ongoing @ rev 3147

git-svn-id: svn://localhost/ardour2/branches/3.0@3152 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/caimportable.cc | 118 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 libs/ardour/caimportable.cc

(limited to 'libs/ardour/caimportable.cc')

diff --git a/libs/ardour/caimportable.cc b/libs/ardour/caimportable.cc
new file mode 100644
index 0000000000..229bfa8809
--- /dev/null
+++ b/libs/ardour/caimportable.cc
@@ -0,0 +1,118 @@
+#include <ardour/caimportable.h>
+#include <sndfile.h>
+#include <pbd/error.h>
+
+#include "i18n.h"
+
+using namespace ARDOUR;
+using namespace std;
+using namespace PBD;
+
+CAImportableSource::CAImportableSource (const string& path)
+{
+	try {
+		af.Open (path.c_str());
+
+		CAStreamBasicDescription file_format (af.GetFileDataFormat());
+		CAStreamBasicDescription client_format (file_format);
+
+		/* set canonial form (PCM, native float packed, 32 bit, with the correct number of channels
+		   and interleaved (since we plan to deinterleave ourselves)
+		*/
+
+		client_format.SetCanonical(client_format.NumberChannels(), true);
+		af.SetClientFormat (client_format);
+
+	} catch (CAXException& cax) {
+		error << string_compose ("CAImportable: %1", cax.mOperation) << endmsg;
+		throw failed_constructor ();
+	}
+
+}
+
+CAImportableSource::~CAImportableSource ()
+{
+}
+
+nframes_t
+CAImportableSource::read (Sample* buffer, nframes_t nframes) 
+{
+	nframes_t nread = 0;
+	AudioBufferList abl;
+	nframes_t per_channel;
+	bool at_end = false;
+
+	abl.mNumberBuffers = 1;
+	abl.mBuffers[0].mNumberChannels = channels();
+
+	per_channel = nframes / abl.mBuffers[0].mNumberChannels;
+
+	while (nread < per_channel) {
+		
+		UInt32 new_cnt = per_channel - nread;
+		
+		abl.mBuffers[0].mDataByteSize = new_cnt * abl.mBuffers[0].mNumberChannels * sizeof(Sample);
+		abl.mBuffers[0].mData = buffer + nread;
+			
+		try {
+			af.Read (new_cnt, &abl);
+		} catch (CAXException& cax) {
+			error << string_compose("CAImportable: %1", cax.mOperation);
+			return -1;
+		}
+
+		if (new_cnt == 0) {
+			/* EOF */
+			at_end = true;
+			break;
+		}
+
+		nread += new_cnt;
+	}
+
+	if (!at_end && nread < per_channel) {
+		return 0;
+	} else {
+		return nread * 	abl.mBuffers[0].mNumberChannels;
+	}
+}
+
+uint
+CAImportableSource::channels () const 
+{
+	return af.GetFileDataFormat().NumberChannels();
+}
+
+nframes_t
+CAImportableSource::length () const 
+{
+	return af.GetNumberFrames();
+}
+
+nframes_t
+CAImportableSource::samplerate() const
+{
+	CAStreamBasicDescription client_asbd;
+
+	try {
+		client_asbd = af.GetClientDataFormat ();
+	} catch (CAXException& cax) {
+		error << string_compose ("CAImportable: %1", cax.mOperation) << endmsg;
+		return 0.0;
+	}
+
+	return client_asbd.mSampleRate;
+}
+
+void
+CAImportableSource::seek (nframes_t pos)
+{
+	try {
+		af.Seek (pos);
+	} catch (CAXException& cax) {
+		error << string_compose ("CAImportable: %1 to %2", cax.mOperation, pos) << endmsg;
+	}
+}
+
+	
+
-- 
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