Add new information to the format properties side bar

Improve InputStream and LibAvHandle to detect the stream
duration in order to present it on the side bar
Improvements in the LibAvHandle to return NOFMT if format is unknown

source/lib/ffmpeg/LibAvContextHandle.cpp

@@ -81,7 +81,7 @@ Void LibAvContextHandle::closeAvFormat()
   m_bHasStream = false;
 }
 
-Bool LibAvContextHandle::initAvFormat( char* filename, UInt& width, UInt& height, Int& pixel_format, UInt& frame_rate )
+Bool LibAvContextHandle::initAvFormat( char* filename, UInt& width, UInt& height, Int& pixel_format, UInt& frame_rate, UInt64& num_frames )
 {
   int ret = 0;
 
@@ -152,9 +152,7 @@ Bool LibAvContextHandle::initAvFormat( char* filename, UInt& width, UInt& height
     video_dst_bufsize = ret;
   }
 
-
   const char *codec_name = avcodec_get_name(video_dec_ctx->codec_id);
-
   sprintf(m_acCodecName, "%s", codec_name);
 
   Double fr = 30;
@@ -171,6 +169,18 @@ Bool LibAvContextHandle::initAvFormat( char* filename, UInt& width, UInt& height
 
   frame_rate = ( UInt )fr;
 
+  if( fmt_ctx->duration != AV_NOPTS_VALUE )
+  {
+    Int64 duration = fmt_ctx->duration + 5000;
+    m_uiSecs = duration / AV_TIME_BASE;
+    num_frames = m_uiSecs * frame_rate;
+    m_uiMicroSec = duration % AV_TIME_BASE;
+  }
+  else
+  {
+    num_frames = 0;
+  }
+
   width = video_dec_ctx->width;
   height = video_dec_ctx->height;
   switch( video_dec_ctx->pix_fmt )
@@ -191,6 +201,7 @@ Bool LibAvContextHandle::initAvFormat( char* filename, UInt& width, UInt& height
     pixel_format = PlaYUVerFrame::RGB8;
     break;
   default:
+    pixel_format = PlaYUVerFrame::NO_FMT;
     break;
   }
 
@@ -269,7 +280,7 @@ Bool LibAvContextHandle::decodeAvFormat()
 
 Void LibAvContextHandle::seekAvFormat( UInt64 frame_num )
 {
-  av_seek_frame( fmt_ctx, video_stream_idx, frame_num, AVSEEK_FLAG_ANY );
+  av_seek_frame( fmt_ctx, video_stream_idx, frame_num, AVSEEK_FLAG_FRAME );
 }
 
 }  // NAMESPACE