From de5eaf3c4bfa323116a23a148ef878d7b856c948 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@zeromus.org>
Date: Wed, 10 Dec 2014 19:39:19 +0000
Subject: [PATCH] discsystem bugfixes: create TOCRaw for CUE files, fix Q
 subchannel generation Control field, make Read_2048 support multiple modes
 (but im not sure how great an idea it is now); add copious warnings about
 unsafe junk that needs rewriting

---
 BizHawk.Emulation.DiscSystem/Disc.cs          | 32 ++++++++++++++++---
 .../SectorInterfaces.cs                       | 13 +++++++-
 .../TOC/DiscStructure.cs                      |  4 +++
 3 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/BizHawk.Emulation.DiscSystem/Disc.cs b/BizHawk.Emulation.DiscSystem/Disc.cs
index b135493420..690e7907aa 100644
--- a/BizHawk.Emulation.DiscSystem/Disc.cs
+++ b/BizHawk.Emulation.DiscSystem/Disc.cs
@@ -205,7 +205,8 @@ FILE ""xarp.barp.marp.farp"" BINARY
 			var ret = new Disc();
 			ret.FromCuePathInternal(cuePath, prefs);
 			ret.Structure.Synthesize_TOCPointsFromSessions();
-			ret.Synthesize_SubcodeFromCurrentTOC();
+			ret.Synthesize_SubcodeFromStructure();
+			ret.Synthesize_TOCRawFromStructure();
 			return ret;
 		}
 
@@ -223,15 +224,38 @@ FILE ""xarp.barp.marp.farp"" BINARY
 			var ret = new Disc();
 			ret.FromIsoPathInternal(isoPath);
 			ret.Structure.Synthesize_TOCPointsFromSessions();
-			ret.Synthesize_SubcodeFromCurrentTOC();
+			ret.Synthesize_SubcodeFromStructure();
 			return ret;
 		}
 
+		/// <summary>
+		/// Synthesizes a crudely estimated TOCRaw from the disc structure.
+		/// </summary>
+		public void Synthesize_TOCRawFromStructure()
+		{
+			TOCRaw = new DiscTOCRaw();
+			TOCRaw.FirstRecordedTrackNumber = 1;
+			TOCRaw.LastRecordedTrackNumber = Structure.Sessions[0].Tracks.Count;
+			int lastEnd = 0;
+			for (int i = 0; i < Structure.Sessions[0].Tracks.Count; i++)
+			{
+				var track = Structure.Sessions[0].Tracks[i];
+				TOCRaw.TOCItems[i + 1].Control = track.Control;
+				TOCRaw.TOCItems[i + 1].Exists = true;
+				//TOCRaw.TOCItems[i + 1].LBATimestamp = new Timestamp(track.Start_ABA - 150); //AUGH. see comment in Start_ABA
+				//TOCRaw.TOCItems[i + 1].LBATimestamp = new Timestamp(track.Indexes[1].LBA);  //ZOUNDS!
+				TOCRaw.TOCItems[i + 1].LBATimestamp = new Timestamp(track.Indexes[1].LBA + 150); //WHATEVER, I DONT KNOW. MAKES IT MATCH THE CCD, BUT THERES MORE PROBLEMS
+				lastEnd = track.LengthInSectors + track.Indexes[1].LBA;
+			}
+
+			TOCRaw.LeadoutTimestamp = new Timestamp(lastEnd);
+		}
+
 		/// <summary>
 		/// Creates the subcode (really, just subchannel Q) for this disc from its current TOC.
 		/// Depends on the TOCPoints existing in the structure
 		/// </summary>
-		void Synthesize_SubcodeFromCurrentTOC()
+		void Synthesize_SubcodeFromStructure()
 		{
 			int aba = 0;
 			int dpIndex = 0;
@@ -249,7 +273,7 @@ FILE ""xarp.barp.marp.farp"" BINARY
 
 				var se = Sectors[aba];
 
-				EControlQ control = EControlQ.None;
+				EControlQ control = dp.Track.Control;
 				
 				//we always use ADR=1 (mode-1 q block)
 				//this could be more sophisticated but it is almost useless for emulation (only useful for catalog/ISRC numbers)
diff --git a/BizHawk.Emulation.DiscSystem/SectorInterfaces.cs b/BizHawk.Emulation.DiscSystem/SectorInterfaces.cs
index 6c7d0da9b3..2f16075679 100644
--- a/BizHawk.Emulation.DiscSystem/SectorInterfaces.cs
+++ b/BizHawk.Emulation.DiscSystem/SectorInterfaces.cs
@@ -31,7 +31,18 @@ namespace BizHawk.Emulation.DiscSystem
 		}
 		public int Read_2048(byte[] buffer, int offset)
 		{
-			return Blob.Read(Offset, buffer, offset, 2048);
+			//this depends on CD-XA mode and such. so we need to read the mode bytes
+			//HEY!!!!!! SHOULD THIS BE DONE BASED ON THE CLAIMED TRACK TYPE, OR ON WHATS IN THE SECTOR?
+			//this is kind of a function of the CD reader.. it's not clear how this function should work.
+			//YIKES!!!!!!!!!!!!!!
+			//well, we need to scrutinize it for CCD files anyway, so...
+			//this sucks.
+			Blob.Read(Offset + 16, buffer, 0, 1);
+			byte mode = buffer[0];
+			if(mode == 1)
+				return Blob.Read(Offset + 16, buffer, offset, 2048);
+			else
+				return Blob.Read(Offset + 24, buffer, offset, 2048);
 		}
 	}
 
diff --git a/BizHawk.Emulation.DiscSystem/TOC/DiscStructure.cs b/BizHawk.Emulation.DiscSystem/TOC/DiscStructure.cs
index 429d94851a..4b0a044711 100644
--- a/BizHawk.Emulation.DiscSystem/TOC/DiscStructure.cs
+++ b/BizHawk.Emulation.DiscSystem/TOC/DiscStructure.cs
@@ -187,6 +187,10 @@ namespace BizHawk.Emulation.DiscSystem
 
 			/// <summary>
 			/// The beginning ABA of the track (index 1). This isn't well-supported, yet
+			/// WHAT? IS THIS NOT AN ABA SOMETIMES?
+			/// IS IT THE INDEX 0 OF THE TRACK? THATS FUCKED UP. COMPARE TO TOCRAW ENTRIES. IT SHOULD BE MATCHING THAT
+			/// HEY??? SHOULD THIS EVEN BE HERE? YOURE SUPPOSED TO USE THE INDEXES INSTEAD.
+			/// WELL, IF WE KEEP THIS THE MEANING SHOULD BE  SAME AS INDEX[1].LBA (or ABA) SO BE SURE TO WRITE THAT COMMENT HERE
 			/// </summary>
 			public int Start_ABA;