X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_frame.h;h=bd586a74b35622ba095d1fac2aad1e4fb9801a38;hb=4112170ce8053261b9c67f58df87c2a3573b6602;hp=941d8ff44b860f169526fbf2b194fb71ae917f0f;hpb=d33f444d4ef4c7bc4074d07a49eca0ab7d108394;p=melted

diff --git a/src/framework/mlt_frame.h b/src/framework/mlt_frame.h
index 941d8ff..bd586a7 100644
--- a/src/framework/mlt_frame.h
+++ b/src/framework/mlt_frame.h
@@ -1,7 +1,10 @@
-/*
- * mlt_frame.h -- interface for all frame classes
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
+/**
+ * \file mlt_frame.h
+ * \brief interface for all frame classes
+ * \see mlt_frame_s
+ *
+ * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
+ * \author Charles Yates <charles.yates@pandora.be>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -25,9 +28,30 @@
 #include "mlt_deque.h"
 #include "mlt_service.h"
 
+/** callback function to get video data
+ *
+ */
+
 typedef int ( *mlt_get_image )( mlt_frame self, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable );
+
+/** callback function to get audio data
+ *
+ */
+
 typedef int ( *mlt_get_audio )( mlt_frame self, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
 
+/** \brief Frame class
+ *
+ * \properties \em test_image set if the frame holds a "test card" image
+ * \properties \em test_audio set if the frame holds "test card" audio
+ * \properties \em _producer holds a reference to the frame's end producer
+ * \properties \em _speed the current speed of the producer that generated the frame
+ * \properties \em _position the position of the frame
+ * \properties \em meta.* holds metadata
+ * \properties \em hide set to 1 to hide the video, 2 to mute the audio
+ * \properties \em last_track a flag to indicate an end-of-tracks frame
+ */
+
 struct mlt_frame_s
 {
 	/* We're extending properties here */
@@ -35,7 +59,7 @@ struct mlt_frame_s
 
 	/* Virtual methods */
 	uint8_t * ( *get_alpha_mask )( mlt_frame self );
-	
+
 	/* Private properties */
 	mlt_deque stack_image;
 	mlt_deque stack_audio;
@@ -90,13 +114,13 @@ extern int mlt_frame_combine_audio( mlt_frame self, mlt_frame that, int16_t **bu
 extern int mlt_sample_calculator( float fps, int frequency, int64_t position );
 extern int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t position );
 
-/* this macro scales rgb into the yuv gamut, y is scaled by 219/255 and uv by 224/255 */
+/** This macro scales rgb into the yuv gamut - y is scaled by 219/255 and uv by 224/255. */
 #define RGB2YUV(r, g, b, y, u, v)\
   y = ((263*r + 516*g + 100*b) >> 10) + 16;\
   u = ((-152*r - 298*g + 450*b) >> 10) + 128;\
   v = ((450*r - 377*g - 73*b) >> 10) + 128;
 
-/* this macro assumes the user has already scaled their rgb down into the broadcast limits */
+/** This macro assumes the user has already scaled their rgb down into the broadcast limits. **/
 #define RGB2YUV_UNSCALED(r, g, b, y, u, v)\
   y = (299*r + 587*g + 114*b) >> 10;\
   u = ((-169*r - 331*g + 500*b) >> 10) + 128;\
@@ -108,6 +132,7 @@ extern int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t p
   u = u > 240 ? 240 : u;\
   v = v > 240 ? 240 : v
 
+/** This macro converts a YUV value to the RGB color space. */
 #define YUV2RGB( y, u, v, r, g, b ) \
   r = ((1192 * ( y - 16 ) + 1634 * ( v - 128 ) ) >> 10 ); \
   g = ((1192 * ( y - 16 ) - 832 * ( v - 128 ) - 400 * ( u - 128 ) ) >> 10 ); \