CDVD: CHD cue support for audio CDs

experimental and will blow out your ears

pcsx2/CDVD/CDVDcommon.h

@@ -66,6 +66,14 @@ struct cdvdTN
 	u8 etrack; //number of the last track
 };
 
+struct toc_entry
+{
+	u32 lba;
+	u8 track;
+	u8 adr : 4;
+	u8 control : 4;
+};
+
 // SpindleCtrl Masks
 #define CDVD_SPINDLE_SPEED 0x7 // Speed ranges from 0-3 (1, 2, 3, 4x for DVD) and 0-5 (1, 2, 4, 12, 24x for CD)
 #define CDVD_SPINDLE_NOMINAL 0x40 // Changes the speed to be constant (CLV) based on current speed

pcsx2/CDVD/CDVDdiscReader.h

@@ -21,14 +21,6 @@ class Error;
 extern int curDiskType;
 extern int curTrayStatus;
 
-struct toc_entry
-{
-	u32 lba;
-	u8 track;
-	u8 adr : 4;
-	u8 control : 4;
-};
-
 class IOCtlSrc
 {
 	IOCtlSrc(const IOCtlSrc&) = delete;

pcsx2/CDVD/CDVDisoReader.cpp

@@ -18,6 +18,44 @@ static int pmode, cdtype;
 static s32 layer1start = -1;
 static bool layer1searched = false;
 
+static void ISOParseTOC()
+{
+	tracks.fill(cdvdTrack{});
+	if (iso.GetType() != ISOTYPE_AUDIO)
+	{
+		strack = 1;
+		etrack = 1;
+		return;
+	}
+
+	strack = 0xFF;
+	etrack = 0;
+	// Audio CD
+	for (const auto& entry : iso.ReadTOC())
+	{
+		const u8 track = entry.track;
+		if (track < 1 || track >= tracks.size())
+		{
+			Console.Warning("CDVD: Invalid track index %u, ignoring\n", track);
+			continue;
+		}
+		strack = std::min(strack, track);
+		etrack = std::max(etrack, track);
+		tracks[track].start_lba = entry.lba;
+
+		if ((entry.control & 0x0C) == 0x04)
+		{
+				Console.Warning("CDVD: Unsupported data track reading. Assuming MODE1?\n");
+				tracks[track].type = CDVD_MODE1_TRACK;
+		}
+		else
+		{
+			tracks[track].type = CDVD_AUDIO_TRACK;
+		}
+	}
+
+}
+
 static void ISOclose()
 {
 	iso.Close();
@@ -49,6 +87,8 @@ static bool ISOopen(std::string filename, Error* error)
 			break;
 	}
 
+	ISOParseTOC();
+
 	layer1start = -1;
 	layer1searched = false;
 
@@ -60,34 +100,56 @@ static bool ISOprecache(ProgressCallback* progress, Error* error)
 	return iso.Precache(progress, error);
 }
 
+static void lsn_to_msf(u8* minute, u8* second, u8* frame, u32 lsn)
+{
+	*frame = itob(lsn % 75);
+	lsn /= 75;
+	*second = itob(lsn % 60);
+	lsn /= 60;
+	*minute = itob(lsn % 100);
+}
+
 static s32 ISOreadSubQ(u32 lsn, cdvdSubQ* subq)
 {
 	// fake it
-	u8 min, sec, frm;
-	subq->ctrl = 4;
-	subq->adr = 1;
-	subq->trackNum = itob(1);
-	subq->trackIndex = itob(1);
+
 
-	lba_to_msf(lsn, &min, &sec, &frm);
-	subq->trackM = itob(min);
-	subq->trackS = itob(sec);
-	subq->trackF = itob(frm);
+	memset(subq, 0, sizeof(cdvdSubQ));
 
-	subq->pad = 0;
+	lsn_to_msf(&subq->discM, &subq->discS, &subq->discF, lsn + 150);
 
-	lba_to_msf(lsn + (2 * 75), &min, &sec, &frm);
-	subq->discM = itob(min);
-	subq->discS = itob(sec);
-	subq->discF = itob(frm);
+	// FIXME: Verify this is correct for ISOTYPE_CD :S
+	if (iso.GetType() != ISOTYPE_AUDIO && iso.GetType() != ISOTYPE_CD)
+	{
+		subq->ctrl = 4;
+		subq->adr = 1;
+		subq->trackNum = itob(1);
+		subq->trackIndex = itob(1);
+	}
+	else
+	{
+		u8 i = strack;
+		while (i < etrack && lsn >= tracks[i + 1].start_lba)
+			++i;
 
+		lsn -= tracks[i].start_lba;
+
+		subq->ctrl = 1;
+		subq->adr = 1;
+		subq->trackNum = i;
+		subq->trackIndex = 1; // FIXME ???
+	}
+
+	lsn_to_msf(&subq->trackM, &subq->trackS, &subq->trackF, lsn);
+
+	Console.Warning("CDVD: SubQ M %02x S %02x F %02x\n", subq->trackM, subq->trackS, subq->trackF);
 	return 0;
 }
 
 static s32 ISOgetTN(cdvdTN* Buffer)
 {
-	Buffer->strack = 1;
-	Buffer->etrack = 1;
+	Buffer->strack = strack;
+	Buffer->etrack = etrack;
 
 	return 0;
 }
@@ -97,13 +159,15 @@ static s32 ISOgetTD(u8 Track, cdvdTD* Buffer)
 	if (Track == 0)
 	{
 		Buffer->lsn = iso.GetBlockCount();
+		Buffer->type = 0;
+		return 0;
 	}
-	else
-	{
-		Buffer->type = CDVD_MODE1_TRACK;
-		Buffer->lsn = 0;
-	}
-
+
+	if (Track < strack || Track > etrack)
+		return -1;
+
+	Buffer->lsn = tracks[Track].start_lba;
+	Buffer->type = tracks[Track].type;
 	return 0;
 }
 
@@ -299,11 +363,12 @@ static s32 ISOgetTOC(void* toc)
 		{
 			err = ISOgetTD(i, &trackInfo);
 			lba_to_msf(trackInfo.lsn, &min, &sec, &frm);
-			tocBuff[i * 10 + 30] = trackInfo.type;
-			tocBuff[i * 10 + 32] = err == -1 ? 0 : itob(i); //number
-			tocBuff[i * 10 + 37] = itob(min);
-			tocBuff[i * 10 + 38] = itob(sec);
-			tocBuff[i * 10 + 39] = itob(frm);
+			const u8 tocIndex = i - diskInfo.strack;
+			tocBuff[tocIndex * 10 + 30] = trackInfo.type;
+			tocBuff[tocIndex * 10 + 32] = err == -1 ? 0 : itob(i); //number
+			tocBuff[tocIndex * 10 + 37] = itob(min);
+			tocBuff[tocIndex * 10 + 38] = itob(sec);
+			tocBuff[tocIndex * 10 + 39] = itob(frm);
 		}
 	}
 	else

pcsx2/CDVD/ChdFileReader.cpp

@@ -176,8 +176,9 @@ bool ChdFileReader::Open2(std::string filename, Error* error)
 
 	// The file size in the header is incorrect, each track gets padded to a multiple of 4 frames.
 	// (see chdman.cpp from MAME). Instead, we pull the real frame count from the TOC.
+	std::vector<toc_entry> entries;
 	u64 total_frames;
-	if (ParseTOC(&total_frames))
+	if (ParseTOC(&total_frames, entries))
 	{
 		file_size = total_frames * static_cast<u64>(chd_header->unitbytes);
 	}
@@ -216,6 +217,21 @@ bool ChdFileReader::Precache2(ProgressCallback* progress, Error* error)
 	return true;
 }
 
+std::vector<toc_entry> ChdFileReader::ReadTOC()
+{
+	u64 total_frames;
+	std::vector<toc_entry> entries;
+	if (ParseTOC(&total_frames, entries))
+	{
+		return entries;
+	}
+	else
+	{
+		Console.Warning("Failed to parse CHD TOC, file size may be incorrect.");
+		return {};
+	}
+}
+
 ThreadedFileReader::Chunk ChdFileReader::ChunkForOffset(u64 offset)
 {
 	Chunk chunk = {0};
@@ -261,7 +277,7 @@ u32 ChdFileReader::GetBlockCount() const
 	return (file_size - m_dataoffset) / m_internalBlockSize;
 }
 
-bool ChdFileReader::ParseTOC(u64* out_frame_count)
+bool ChdFileReader::ParseTOC(u64* out_frame_count, std::vector<toc_entry>& entries)
 {
 	u64 total_frames = 0;
 	int max_found_track = -1;
@@ -305,15 +321,29 @@ bool ChdFileReader::ParseTOC(u64* out_frame_count)
 			}
 		}
 
-		DevCon.WriteLn(fmt::format("CHD Track {}: frames:{} pregap:{} postgap:{} type:{} sub:{} pgtype:{} pgsub:{}",
+		Console.WriteLn(fmt::format("CHD Track {}: frames:{} pregap:{} postgap:{} type:{} sub:{} pgtype:{} pgsub:{}",
 			track_num, frames, pregap_frames, postgap_frames, type_str, subtype_str, pgtype_str, pgsub_str));
 
-		// PCSX2 doesn't currently support multiple tracks for CDs.
-		if (track_num != 1)
+		if (track_num != 0)
+		{
+			toc_entry entry{};
+			entry.lba = static_cast<u32>(total_frames);
+			entry.track = static_cast<u8>(track_num);
+			entry.adr = 1;
+			entry.control = 0;
+
+			//FIXME: DATA track?
+			if (strncmp(type_str, "AUDIO", 5) != 0)
+				entry.control |= 0x04;
+
+			entries.push_back(entry);
+		}
+		// PCSX2 doesn't currently support multiple tracks for CDs. 
+		/* if (track_num != 1)
 		{
 			Console.Warning(fmt::format("  Ignoring track {} in CHD.", track_num, frames));
 			continue;
-		}
+		}*/
 
 		total_frames += static_cast<u64>(pregap_frames) + static_cast<u64>(frames) + static_cast<u64>(postgap_frames);
 		max_found_track = std::max(max_found_track, track_num);

pcsx2/CDVD/ChdFileReader.h

@@ -19,14 +19,16 @@ class ChdFileReader final : public ThreadedFileReader
 
 	bool Precache2(ProgressCallback* progress, Error* error) override;
 
+	std::vector<toc_entry> ReadTOC() override;
+
 	Chunk ChunkForOffset(u64 offset) override;
 	int ReadChunk(void* dst, s64 blockID) override;
 
 	void Close2(void) override;
 	uint GetBlockCount(void) const override;
 
 private:
-	bool ParseTOC(u64* out_frame_count);
+	bool ParseTOC(u64* out_frame_count, std::vector<toc_entry>& entries);
 
 	chd_file* ChdFile = nullptr;
 	u64 file_size = 0;

pcsx2/CDVD/InputIsoFile.cpp

@@ -163,6 +163,17 @@ int InputIsoFile::FinishRead3(u8* dst, uint mode)
 	return 0;
 }
 
+std::vector<toc_entry> InputIsoFile::ReadTOC() const
+{
+	std::vector<toc_entry> toc;
+
+	if (m_type == ISOTYPE_ILLEGAL)
+		return toc;
+
+	toc = m_reader->ReadTOC();
+	return toc;
+}
+
 InputIsoFile::InputIsoFile()
 {
 	_init();
@@ -271,7 +282,7 @@ bool InputIsoFile::tryIsoType(u32 size, u32 offset, u32 blockofs)
 // Returns true if the image is valid/known/supported, or false if not (type == ISOTYPE_ILLEGAL).
 bool InputIsoFile::Detect(bool readType)
 {
-	m_type = ISOTYPE_ILLEGAL;
+ 	m_type = ISOTYPE_ILLEGAL;
 
 	// First sanity check: no sane CD image has less than 16 sectors, since that's what
 	// we need simply to contain a TOC.  So if the file size is not large enough to

pcsx2/CDVD/IsoFileFormats.h

@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include "CDVDcommon.h"
 #include "CDVD/CDVD.h"
 #include "CDVD/ThreadedFileReader.h"
 #include <memory>
@@ -75,6 +76,8 @@ class InputIsoFile final
 	void BeginRead2(uint lsn);
 	int FinishRead3(u8* dest, uint mode);
 
+	std::vector<toc_entry> ReadTOC() const;
+
 protected:
 	void _init();
 

pcsx2/CDVD/ThreadedFileReader.cpp

@@ -264,6 +264,12 @@ bool ThreadedFileReader::Precache2(ProgressCallback* progress, Error* error)
 	return false;
 }
 
+std::vector<toc_entry> ThreadedFileReader::ReadTOC()
+{
+	return {};
+}
+
+
 bool ThreadedFileReader::CheckAvailableMemoryForPrecaching(u64 required_size, Error* error)
 {
 	// Don't allow precaching to use more than 50% of system memory.

pcsx2/CDVD/ThreadedFileReader.h

@@ -4,6 +4,7 @@
 #pragma once
 
 #include "common/Pcsx2Defs.h"
+#include "CDVDcommon.h"
 
 #include <thread>
 #include <mutex>
@@ -117,6 +118,7 @@ class ThreadedFileReader
 
 	bool Open(std::string filename, Error* error);
 	bool Precache(ProgressCallback* progress, Error* error);
+	virtual std::vector<toc_entry> ReadTOC();
 	int ReadSync(void* pBuffer, u32 sector, u32 count);
 	void BeginRead(void* pBuffer, u32 sector, u32 count);
 	int FinishRead();