Frame.cpp/h: Fix a bunch of wrong comments

Best reason not to narrate the code in the comments: The code gets
changed, but the documentation doesn't.

include/Frame.h

@@ -73,17 +73,17 @@ namespace openshot
 	 * There are many ways to create an instance of an openshot::Frame:
 	 * @code
 	 *
-	 * // Most basic: a blank frame (300x200 blank image, 48kHz audio silence)
+	 * // Most basic: a blank frame (all default values)
 	 * Frame();
 	 *
-	 * // Image only settings (48kHz audio silence)
+	 * // Image only settings
 	 * Frame(1, // Frame number
 	 *       720, // Width of image
 	 *       480, // Height of image
 	 *       "#000000" // HTML color code of background color
 	 *       );
 	 *
-	 * // Audio only (300x200 blank image)
+	 * // Audio only
 	 * Frame(number, // Frame number
 	 *       44100, // Sample rate of audio stream
 	 *       2 // Number of audio channels
@@ -131,13 +131,13 @@ namespace openshot
 		bool has_image_data; ///< This frame has been loaded with pixel data
 
 
-		/// Constructor - blank frame (300x200 blank image, 48kHz audio silence)
+		/// Constructor - blank frame
 		Frame();
 
-		/// Constructor - image only (48kHz audio silence)
+		/// Constructor - image only
 		Frame(int64_t number, int width, int height, std::string color);
 
-		/// Constructor - audio only (300x200 blank image)
+		/// Constructor - audio only
 		Frame(int64_t number, int samples, int channels);
 
 		/// Constructor - image & audio

src/Frame.cpp

@@ -33,41 +33,35 @@
 using namespace std;
 using namespace openshot;
 
-// Constructor - blank frame (300x200 blank image, 48kHz audio silence)
+// Constructor - blank frame
 Frame::Frame() : number(1), pixel_ratio(1,1), channels(2), width(1), height(1), color("#000000"),
 		channel_layout(LAYOUT_STEREO), sample_rate(44100), qbuffer(NULL), has_audio_data(false), has_image_data(false),
 		max_audio_sample(0)
 {
-	// Init the image magic and audio buffer
+	// Allocate and zero (fill with silence) the audio buffer
 	audio = std::make_shared<juce::AudioSampleBuffer>(channels, 0);
-
-	// initialize the audio samples to zero (silence)
 	audio->clear();
 }
 
-// Constructor - image only (48kHz audio silence)
+// Constructor - image only
 Frame::Frame(int64_t number, int width, int height, std::string color)
 	: number(number), pixel_ratio(1,1), channels(2), width(width), height(height), color(color),
 	  channel_layout(LAYOUT_STEREO), sample_rate(44100), qbuffer(NULL), has_audio_data(false), has_image_data(false),
 	  max_audio_sample(0)
 {
-	// Init the image magic and audio buffer
+	// Allocate and zero (fill with silence) the audio buffer
 	audio = std::make_shared<juce::AudioSampleBuffer>(channels, 0);
-
-	// initialize the audio samples to zero (silence)
 	audio->clear();
 }
 
-// Constructor - audio only (300x200 blank image)
+// Constructor - audio only
 Frame::Frame(int64_t number, int samples, int channels) :
 		number(number), pixel_ratio(1,1), channels(channels), width(1), height(1), color("#000000"),
 		channel_layout(LAYOUT_STEREO), sample_rate(44100), qbuffer(NULL), has_audio_data(false), has_image_data(false),
 		max_audio_sample(0)
 {
-	// Init the image magic and audio buffer
+	// Allocate and zero (fill with silence) the audio buffer
 	audio = std::make_shared<juce::AudioSampleBuffer>(channels, samples);
-
-	// initialize the audio samples to zero (silence)
 	audio->clear();
 }
 
@@ -77,10 +71,8 @@ Frame::Frame(int64_t number, int width, int height, std::string color, int sampl
 	  channel_layout(LAYOUT_STEREO), sample_rate(44100), qbuffer(NULL), has_audio_data(false), has_image_data(false),
 	  max_audio_sample(0)
 {
-	// Init the image magic and audio buffer
+	// Allocate and zero (fill with silence) the audio buffer
 	audio = std::make_shared<juce::AudioSampleBuffer>(channels, samples);
-
-	// initialize the audio samples to zero (silence)
 	audio->clear();
 }