Wrapper around SF_INFO and AudioFileBasicDescription.

git-svn-id: svn://localhost/trunk/ardour2@357 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/SConscript

@@ -163,8 +163,8 @@ if conf.CheckCHeader('/System/Library/Frameworks/CoreMIDI.framework/Headers/Core
     ardour.Append(LINKFLAGS="-framework CoreMIDI")
 
 if conf.CheckCHeader('/System/Library/Frameworks/AudioToolbox.framework/Headers/ExtendedAudioFile.h'):
-	ardour.Append(LINKFLAGS="-framework AudioToolbox")
-	extra_sources += coreaudio_files
+    ardour.Append(CXXFLAGS="-DHAVE_COREAUDIO")    
+    extra_sources += coreaudio_files
 
 ardour = conf.Finish ()
 

libs/ardour/ardour/sndfile_helpers.h

@@ -35,4 +35,13 @@ int sndfile_data_width (int format);
 string sndfile_major_format(int);
 string sndfile_minor_format(int);
 
+struct SoundFileInfo {
+	float    samplerate;
+	uint16_t channels;
+	int64_t length;
+	std::string format_name;
+};
+
+bool get_soundfile_info (string path, SoundFileInfo& _info);
+
 #endif /* __sndfile_helpers_h__ */

libs/ardour/sndfile_helpers.cc

@@ -4,6 +4,11 @@
 #include <sndfile.h>
 #include <ardour/sndfile_helpers.h>
 
+#ifdef HAVE_COREAUDIO
+#include <AudioToolbox/ExtendedAudioFile.h>
+#include <AudioToolbox/AudioFormat.h>
+#endif // HAVE_COREAUDIO
+
 #include "i18n.h"
 
 using std::map;
@@ -191,3 +196,102 @@ sndfile_minor_format(int format)
 		return "-Unknown-";
 	}
 }
+
+#ifdef HAVE_COREAUDIO
+std::string 
+CFStringRefToStdString(CFStringRef stringRef)
+{
+	CFIndex size = 
+		CFStringGetMaximumSizeForEncoding(CFStringGetLength(stringRef) , 
+		kCFStringEncodingASCII);
+	    char *buf = new char[size];
+	
+	std::string result;
+
+	if(CFStringGetCString(stringRef, buf, size, kCFStringEncodingASCII)) {
+	    result = buf;
+	}
+	delete [] buf;
+	return result;
+}
+#endif // HAVE_COREAUDIO
+
+bool
+get_soundfile_info (string path, SoundFileInfo& _info)
+{
+#ifdef HAVE_COREAUDIO
+	OSStatus err = noErr;
+    FSRef* ref; 
+	ExtAudioFileRef af = 0;
+	size_t size;
+    CFStringRef name;
+
+    err = FSPathMakeRef ((UInt8*)path.c_str(), ref, 0);
+	if (err != noErr) {
+        ExtAudioFileDispose (af);
+		goto libsndfile;
+	}
+
+	err = ExtAudioFileOpen(ref, &af);
+	if (err != noErr) {
+        ExtAudioFileDispose (af);
+		goto libsndfile;
+	}
+
+	AudioStreamBasicDescription absd;
+	memset(&absd, 0, sizeof(absd));
+	size = sizeof(AudioStreamBasicDescription);
+	err = ExtAudioFileGetProperty(af,
+			kExtAudioFileProperty_FileDataFormat, &size, &absd);
+	if (err != noErr) {
+        ExtAudioFileDispose (af);
+		goto libsndfile;
+	}
+
+	_info.samplerate = absd.mSampleRate;
+	_info.channels   = absd.mChannelsPerFrame;
+
+    size = sizeof(_info.length);
+    err = ExtAudioFileGetProperty(af, kExtAudioFileProperty_FileLengthFrames, &size, &_info.length);
+    if (err != noErr) {
+        ExtAudioFileDispose (af);
+		goto libsndfile;
+    }
+
+	size = sizeof(CFStringRef);
+	err = AudioFormatGetProperty(
+			kAudioFormatProperty_FormatName, sizeof(absd), &absd, &size, &name);
+	if (err != noErr) {
+        ExtAudioFileDispose (af);
+		goto libsndfile;
+	}
+
+	_info.format_name = CFStringRefToStdString(name);
+
+    ExtAudioFileDispose (af);
+	return true;
+	
+libsndfile:
+#endif // HAVE_COREAUDIO
+
+	SNDFILE *sf;
+	SF_INFO sf_info;
+
+	sf_info.format = 0; // libsndfile says to clear this before sf_open().
+
+	if ((sf = sf_open ((char*) path.c_str(), SFM_READ, &sf_info)) < 0) { 
+		return false;
+	}
+
+	sf_close (sf);
+
+	_info.samplerate  = sf_info.samplerate;
+	_info.channels    = sf_info.channels;
+	_info.length      = sf_info.frames;
+	_info.format_name = string_compose("Format: %1, %2",
+			sndfile_major_format(sf_info.format),
+			sndfile_minor_format(sf_info.format));
+
+	return true;
+}
+