audioplayer: show cover from id3-tag or folder.jpg in header

if exist a file called folder.jpg in same dir as the audiofile
 or a audiocover is defined in id3-tag it will be displayed in header.

 cover in tag is preferred.

 ported from mohusch. original patch by tangocash. thx!


Origin commit data
------------------
Commit: fe07423ad1
Author: vanhofen <vanhofen@gmx.de>
Date: 2013-11-09 (Sat, 09 Nov 2013)

Origin message was:
------------------
- audioplayer: show cover from id3-tag or folder.jpg in header

 if exist a file called folder.jpg in same dir as the audiofile
 or a audiocover is defined in id3-tag it will be displayed in header.

 cover in tag is preferred.

 ported from mohusch. original patch by tangocash. thx!

src/driver/audiodec/mp3dec.cpp

@@ -944,6 +944,7 @@ bool CMP3Dec::GetMetaData(FILE* in, const bool nice, CAudioMetaData* const m)
 	{
 		res = GetMP3Info(in, nice, m);
 		GetID3(in, m);
+		SaveCover(in, m);
 	}
 	else
 	{
@@ -1344,6 +1345,82 @@ void CMP3Dec::GetID3(FILE* in, CAudioMetaData* const m)
 	}
 }
 
+bool CMP3Dec::SaveCover(FILE * in, CAudioMetaData * const m)
+{
+	struct id3_frame const *frame;
+	const char * coverfile = "/tmp/cover.jpg";
+
+	/* text information */
+	struct id3_file *id3file = id3_file_fdopen(fileno(in), ID3_FILE_MODE_READONLY);
+
+	if(id3file == 0)
+	{
+		printf("CMP3Dec::SaveCover: error open id3 file\n");
+		return false;
+	}
+	else
+	{
+		id3_tag * tag = id3_file_tag(id3file);
+		if(tag)
+		{
+			frame = id3_tag_findframe(tag, "APIC", 0);
+
+			if (frame)
+			{
+				printf("CMP3Dec::SaveCover: Cover found\n");
+				// Picture file data
+				unsigned int j;
+				union id3_field const *field;
+
+				for (j = 0; (field = id3_frame_field(frame, j)); j++)
+				{
+					switch (id3_field_type(field))
+					{
+						case ID3_FIELD_TYPE_BINARYDATA:
+							id3_length_t size;
+							id3_byte_t const *data;
+
+							data = id3_field_getbinarydata(field, &size);
+							if ( data )
+							{
+								m->cover = coverfile;
+								FILE * pFile;
+								pFile = fopen ( coverfile , "wb" );
+								fwrite (data , 1 , size , pFile );
+								fclose (pFile);
+							}
+							break;
+
+						case ID3_FIELD_TYPE_INT8:
+							//pic->type = id3_field_getint(field);
+							break;
+
+						default:
+							break;
+					}
+				}
+			}
+
+			id3_tag_delete(tag);
+		}
+		else
+		{
+			printf("CMP3Dec::SaveCover: error open id3 tag\n");
+			return false;
+		}
+
+		id3_finish_file(id3file);
+	}
+
+	if(0)
+	{
+		printf("CMP3Dec::SaveCover:id3: not enough memory to display tag\n");
+		return false;
+	}
+
+	return true;
+}
+
 // this is a copy of static libid3tag function "finish_file"
 // which cannot be called from outside
 void id3_finish_file(struct id3_file* file)

src/driver/audiodec/mp3dec.h

@@ -73,6 +73,7 @@ public:
 							State* const state, CAudioMetaData* m,
 							time_t* const t, unsigned int* const secondsToSkip);
 	bool GetMetaData(FILE *in, const bool nice, CAudioMetaData* const m);
+	bool SaveCover(FILE*, CAudioMetaData * const m);
 	CMP3Dec(){};
 
 };

src/driver/audiometadata.cpp

@@ -51,7 +51,7 @@ CAudioMetaData::CAudioMetaData( const CAudioMetaData& src )
 	audio_start_pos( src.audio_start_pos ), vbr( src.vbr ),
 	hasInfoOrXingTag( src.hasInfoOrXingTag ), artist( src.artist ),
 	title( src.title ), album( src.album ), sc_station( src.sc_station ),
-	date( src.date ), genre( src.genre ), track( src.track ),
+	date( src.date ), genre( src.genre ), track( src.track ),cover(src.cover),
 	changed( src.changed )
 {
 }
@@ -81,6 +81,7 @@ void CAudioMetaData::operator=( const CAudioMetaData& src )
 	date = src.date;
 	genre = src.genre;
 	track = src.track;
+	cover = src.cover;
 	sc_station = src.sc_station;
 	changed = src.changed;
 }
@@ -104,5 +105,6 @@ void CAudioMetaData::clear()
 	date.clear();
 	genre.clear();
 	track.clear();
+	cover.clear();
 	changed=false;
 }

src/driver/audiometadata.h

@@ -84,6 +84,7 @@ public:
 	std::string date;
 	std::string genre;
 	std::string track;
+	std::string cover;
 	bool changed;
 };
 #endif /* __AUDIO_METADATA__ */

src/gui/audioplayer.cpp

@@ -66,6 +66,7 @@
 #include <gui/widget/stringinput_ext.h>
 
 #include "gui/pictureviewer.h"
+extern CPictureViewer * g_PicViewer;
 
 #include <system/settings.h>
 #include <system/helpers.h>
@@ -2169,6 +2170,25 @@ void CAudioPlayerGui::updateMetaData(bool screen_saver)
 			m_curr_audiofile.MetaData.album = meta.sc_station;
 			updateLcd = true;
 		}
+
+		std::string cover = m_curr_audiofile.Filename.substr(0, m_curr_audiofile.Filename.rfind('/')) + "/folder.jpg";
+
+		if (!meta.cover.empty())
+			cover = "/tmp/cover.jpg";
+
+		if ((access(cover.c_str(), F_OK) == 0) && !screen_saver)
+		{
+			g_PicViewer->DisplayImage(cover, m_x + 2, m_y + 2, m_title_height - 14, m_title_height - 14, m_frameBuffer->TM_NONE);
+
+			if(g_settings.rounded_corners)
+			{
+				//repaint frame to cover up the corners of the cover; FIXME
+				if (!m_show_playlist)
+					m_frameBuffer->paintBoxFrame(m_x, m_y, m_width, m_title_height - 10 - m_fheight, 2, COL_MENUCONTENT_PLUS_6, RADIUS_MID);
+				else
+					m_frameBuffer->paintBoxFrame(m_x, m_y, m_width, m_title_height - 10, 2, COL_MENUCONTENT_PLUS_6, RADIUS_MID);
+			}
+		}
 	}
 	//if (CAudioPlayer::getInstance()->getScBuffered() != 0)
 	if (CAudioPlayer::getInstance()->hasMetaDataChanged() != 0)
@@ -2183,8 +2203,7 @@ void CAudioPlayerGui::updateMetaData(bool screen_saver)
 	
 	if (updateMeta || updateScreen)
 	{
-		m_frameBuffer->paintBoxRel(m_x + 10, m_y + 4 + 2*m_fheight, m_width - 20,
+		m_frameBuffer->paintBoxRel(m_x + 10 + m_title_height, m_y + 4 + 2*m_fheight, m_width - 20 - m_title_height, m_sheight, COL_MENUCONTENTSELECTED_PLUS_0);
-					   m_sheight, COL_MENUCONTENTSELECTED_PLUS_0);
 		int xstart = ((m_width - 20 - g_Font[SNeutrinoSettings::FONT_TYPE_INFOBAR_SMALL]->getRenderWidth(m_metainfo))/2)+10;
 		g_Font[SNeutrinoSettings::FONT_TYPE_INFOBAR_SMALL]
 		->RenderString(m_x + xstart, m_y + 4 + 2*m_fheight + m_sheight,