mirror of https://github.com/PCSX2/pcsx2.git
508 lines
13 KiB
C++
508 lines
13 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2014 David Quintana [gigaherz]
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "CDVD.h"
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#include <cstdio>
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#include <atomic>
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#include <condition_variable>
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#include <thread>
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#include "svnrev.h"
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Settings g_settings;
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static std::string s_config_file{"inis/cdvdGigaherz.ini"};
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void (*newDiscCB)();
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static std::mutex s_keepalive_lock;
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static std::condition_variable s_keepalive_cv;
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static std::thread s_keepalive_thread;
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// State Information //
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u8 strack;
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u8 etrack;
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track tracks[100];
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int curDiskType;
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int curTrayStatus;
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int csector;
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int cmode;
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// Plugin Interface //
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#ifndef PCSX2_DEBUG
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static std::string s_libname("cdvdGigaherz " + std::to_string(SVN_REV));
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#else
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static std::string s_libname("cdvdGigaherz Debug " + std::to_string(SVN_REV));
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#endif
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const unsigned char version = PS2E_CDVD_VERSION;
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const unsigned char revision = 0;
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const unsigned char build = 11;
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EXPORT const char *CALLBACK PS2EgetLibName()
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{
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return s_libname.c_str();
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}
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EXPORT u32 CALLBACK PS2EgetLibType()
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{
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return PS2E_LT_CDVD;
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}
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EXPORT u32 CALLBACK PS2EgetLibVersion2(u32 type)
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{
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return (version << 16) | (revision << 8) | build;
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// Utility Functions //
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inline u8 dec_to_bcd(u8 dec)
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{
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return ((dec / 10) << 4) | (dec % 10);
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}
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inline void lsn_to_msf(u8 *minute, u8 *second, u8 *frame, u32 lsn)
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{
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*frame = dec_to_bcd(lsn % 75);
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lsn /= 75;
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*second = dec_to_bcd(lsn % 60);
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lsn /= 60;
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*minute = dec_to_bcd(lsn % 100);
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}
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void ReadSettings()
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{
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g_settings.Load(s_config_file);
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}
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void WriteSettings()
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{
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g_settings.Save(s_config_file);
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// CDVD processing functions //
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std::atomic<bool> s_keepalive_is_open;
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bool disc_has_changed = false;
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bool weAreInNewDiskCB = false;
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std::unique_ptr<IOCtlSrc> src;
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extern u32 g_last_sector_block_lsn;
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///////////////////////////////////////////////////////////////////////////////
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// keepAliveThread throws a read event regularly to prevent drive spin down //
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void keepAliveThread()
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{
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u8 throwaway[2352];
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printf(" * CDVD: KeepAlive thread started...\n");
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std::unique_lock<std::mutex> guard(s_keepalive_lock);
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while (!s_keepalive_cv.wait_for(guard, std::chrono::seconds(30),
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[]() { return !s_keepalive_is_open; })) {
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//printf(" * keepAliveThread: polling drive.\n");
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if (src->GetMediaType() >= 0)
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src->ReadSectors2048(g_last_sector_block_lsn, 1, throwaway);
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else
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src->ReadSectors2352(g_last_sector_block_lsn, 1, throwaway);
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}
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printf(" * CDVD: KeepAlive thread finished.\n");
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}
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bool StartKeepAliveThread()
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{
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s_keepalive_is_open = true;
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try {
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s_keepalive_thread = std::thread(keepAliveThread);
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} catch (std::system_error &) {
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s_keepalive_is_open = false;
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}
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return s_keepalive_is_open;
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}
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void StopKeepAliveThread()
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{
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if (!s_keepalive_thread.joinable())
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return;
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{
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std::lock_guard<std::mutex> guard(s_keepalive_lock);
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s_keepalive_is_open = false;
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}
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s_keepalive_cv.notify_one();
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s_keepalive_thread.join();
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// CDVD Pluin Interface //
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EXPORT void CALLBACK CDVDsetSettingsDir(const char *dir)
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{
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s_config_file = std::string(dir ? dir : "inis") + "/cdvdGigaherz.ini";
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}
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EXPORT s32 CALLBACK CDVDinit()
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{
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return 0;
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}
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EXPORT s32 CALLBACK CDVDopen(const char *pTitleFilename)
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{
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ReadSettings();
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auto drive = GetValidDrive();
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if (drive.empty())
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return -1;
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// open device file
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try {
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src = std::unique_ptr<IOCtlSrc>(new IOCtlSrc(drive));
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} catch (std::runtime_error &ex) {
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fputs(ex.what(), stdout);
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return -1;
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}
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//setup threading manager
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if (!cdvdStartThread()) {
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src.reset();
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return -1;
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}
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StartKeepAliveThread();
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return cdvdRefreshData();
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}
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EXPORT void CALLBACK CDVDclose()
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{
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StopKeepAliveThread();
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cdvdStopThread();
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//close device
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src.reset();
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}
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EXPORT void CALLBACK CDVDshutdown()
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{
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//nothing to do here
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}
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EXPORT s32 CALLBACK CDVDgetDualInfo(s32 *dualType, u32 *_layer1start)
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{
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switch (src->GetMediaType()) {
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case 1:
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*dualType = 1;
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*_layer1start = src->GetLayerBreakAddress() + 1;
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return 0;
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case 2:
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*dualType = 2;
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*_layer1start = src->GetLayerBreakAddress() + 1;
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return 0;
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case 0:
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*dualType = 0;
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*_layer1start = 0;
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return 0;
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}
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return -1;
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}
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int lastReadInNewDiskCB = 0;
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u8 directReadSectorBuffer[2448];
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EXPORT s32 CALLBACK CDVDreadSector(u8 *buffer, u32 lsn, int mode)
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{
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return cdvdDirectReadSector(lsn, mode, buffer);
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}
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EXPORT s32 CALLBACK CDVDreadTrack(u32 lsn, int mode)
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{
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csector = lsn;
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cmode = mode;
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if (weAreInNewDiskCB) {
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int ret = cdvdDirectReadSector(lsn, mode, directReadSectorBuffer);
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if (ret == 0)
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lastReadInNewDiskCB = 1;
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return ret;
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}
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return lsn < src->GetSectorCount() ? cdvdRequestSector(lsn, mode) : -1;
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}
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// return can be NULL (for async modes)
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EXPORT u8 *CALLBACK CDVDgetBuffer()
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{
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if (lastReadInNewDiskCB) {
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lastReadInNewDiskCB = 0;
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return directReadSectorBuffer;
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}
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return cdvdGetSector(csector, cmode);
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}
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// return can be NULL (for async modes)
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EXPORT int CALLBACK CDVDgetBuffer2(u8 *dest)
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{
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int csize = 2352;
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switch (cmode) {
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case CDVD_MODE_2048:
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csize = 2048;
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break;
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case CDVD_MODE_2328:
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csize = 2328;
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break;
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case CDVD_MODE_2340:
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csize = 2340;
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break;
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}
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if (lastReadInNewDiskCB) {
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lastReadInNewDiskCB = 0;
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memcpy(dest, directReadSectorBuffer, csize);
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return 0;
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}
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memcpy(dest, cdvdGetSector(csector, cmode), csize);
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return 0;
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}
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EXPORT s32 CALLBACK CDVDreadSubQ(u32 lsn, cdvdSubQ *subq)
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{
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// the formatted subq command returns: control/adr, track, index, trk min, trk sec, trk frm, 0x00, abs min, abs sec, abs frm
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if (lsn >= src->GetSectorCount())
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return -1;
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memset(subq, 0, sizeof(cdvdSubQ));
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lsn_to_msf(&subq->discM, &subq->discS, &subq->discF, lsn + 150);
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u8 i = strack;
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while (i < etrack && lsn >= tracks[i + 1].start_lba)
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++i;
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lsn -= tracks[i].start_lba;
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lsn_to_msf(&subq->trackM, &subq->trackS, &subq->trackF, lsn);
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subq->mode = 1;
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subq->ctrl = tracks[i].type;
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subq->trackNum = i;
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subq->trackIndex = 1;
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return 0;
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}
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EXPORT s32 CALLBACK CDVDgetTN(cdvdTN *Buffer)
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{
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Buffer->strack = strack;
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Buffer->etrack = etrack;
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return 0;
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}
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EXPORT s32 CALLBACK CDVDgetTD(u8 Track, cdvdTD *Buffer)
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{
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if (Track == 0) {
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Buffer->lsn = src->GetSectorCount();
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Buffer->type = 0;
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return 0;
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}
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if (Track < strack)
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return -1;
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if (Track > etrack)
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return -1;
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Buffer->lsn = tracks[Track].start_lba;
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Buffer->type = tracks[Track].type;
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return 0;
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}
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EXPORT s32 CALLBACK CDVDgetTOC(void *toc)
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{
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u8 *tocBuff = static_cast<u8 *>(toc);
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if (curDiskType == CDVD_TYPE_NODISC)
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return -1;
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if (curDiskType == CDVD_TYPE_DETCTDVDS || curDiskType == CDVD_TYPE_DETCTDVDD) {
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memset(tocBuff, 0, 2048);
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s32 mt = src->GetMediaType();
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if (mt < 0)
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return -1;
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if (mt == 0) { //single layer
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// fake it
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tocBuff[0] = 0x04;
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tocBuff[1] = 0x02;
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tocBuff[2] = 0xF2;
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tocBuff[3] = 0x00;
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tocBuff[4] = 0x86;
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tocBuff[5] = 0x72;
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tocBuff[16] = 0x00; // first sector for layer 0
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tocBuff[17] = 0x03;
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tocBuff[18] = 0x00;
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tocBuff[19] = 0x00;
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} else if (mt == 1) { //PTP
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u32 layer1start = src->GetLayerBreakAddress() + 0x30000;
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// dual sided
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tocBuff[0] = 0x24;
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tocBuff[1] = 0x02;
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tocBuff[2] = 0xF2;
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tocBuff[3] = 0x00;
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tocBuff[4] = 0x41;
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tocBuff[5] = 0x95;
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tocBuff[14] = 0x61; // PTP
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tocBuff[16] = 0x00;
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tocBuff[17] = 0x03;
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tocBuff[18] = 0x00;
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tocBuff[19] = 0x00;
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tocBuff[20] = (layer1start >> 24);
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tocBuff[21] = (layer1start >> 16) & 0xff;
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tocBuff[22] = (layer1start >> 8) & 0xff;
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tocBuff[23] = (layer1start >> 0) & 0xff;
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} else { //OTP
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u32 layer1start = src->GetLayerBreakAddress() + 0x30000;
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// dual sided
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tocBuff[0] = 0x24;
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tocBuff[1] = 0x02;
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tocBuff[2] = 0xF2;
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tocBuff[3] = 0x00;
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tocBuff[4] = 0x41;
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tocBuff[5] = 0x95;
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tocBuff[14] = 0x71; // OTP
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tocBuff[16] = 0x00;
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tocBuff[17] = 0x03;
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tocBuff[18] = 0x00;
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tocBuff[19] = 0x00;
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tocBuff[24] = (layer1start >> 24);
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tocBuff[25] = (layer1start >> 16) & 0xff;
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tocBuff[26] = (layer1start >> 8) & 0xff;
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tocBuff[27] = (layer1start >> 0) & 0xff;
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}
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} else if (curDiskType == CDVD_TYPE_DETCTCD) {
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// cd toc
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// (could be replaced by 1 command that reads the full toc)
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u8 min, sec, frm, i;
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s32 err;
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cdvdTN diskInfo;
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cdvdTD trackInfo;
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memset(tocBuff, 0, 1024);
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if (CDVDgetTN(&diskInfo) == -1) {
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diskInfo.etrack = 0;
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diskInfo.strack = 1;
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}
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if (CDVDgetTD(0, &trackInfo) == -1)
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trackInfo.lsn = 0;
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tocBuff[0] = 0x41;
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tocBuff[1] = 0x00;
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//Number of FirstTrack
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tocBuff[2] = 0xA0;
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tocBuff[7] = dec_to_bcd(diskInfo.strack);
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//Number of LastTrack
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tocBuff[12] = 0xA1;
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tocBuff[17] = dec_to_bcd(diskInfo.etrack);
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//DiskLength
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lba_to_msf(trackInfo.lsn, &min, &sec, &frm);
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tocBuff[22] = 0xA2;
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tocBuff[27] = dec_to_bcd(min);
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tocBuff[28] = dec_to_bcd(sec);
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tocBuff[29] = dec_to_bcd(frm);
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fprintf(stderr, "Track 0: %u mins %u secs %u frames\n", min, sec, frm);
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for (i = diskInfo.strack; i <= diskInfo.etrack; i++) {
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err = CDVDgetTD(i, &trackInfo);
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lba_to_msf(trackInfo.lsn, &min, &sec, &frm);
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tocBuff[i * 10 + 30] = trackInfo.type;
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tocBuff[i * 10 + 32] = err == -1 ? 0 : dec_to_bcd(i); //number
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tocBuff[i * 10 + 37] = dec_to_bcd(min);
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tocBuff[i * 10 + 38] = dec_to_bcd(sec);
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tocBuff[i * 10 + 39] = dec_to_bcd(frm);
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fprintf(stderr, "Track %u: %u mins %u secs %u frames\n", i, min, sec, frm);
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}
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} else
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return -1;
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return 0;
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}
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EXPORT s32 CALLBACK CDVDgetDiskType()
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{
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return curDiskType;
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}
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EXPORT s32 CALLBACK CDVDgetTrayStatus()
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{
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return curTrayStatus;
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}
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EXPORT s32 CALLBACK CDVDctrlTrayOpen()
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{
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curTrayStatus = CDVD_TRAY_OPEN;
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return 0;
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}
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EXPORT s32 CALLBACK CDVDctrlTrayClose()
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{
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curTrayStatus = CDVD_TRAY_CLOSE;
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return 0;
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}
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EXPORT void CALLBACK CDVDnewDiskCB(void (*callback)())
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{
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newDiscCB = callback;
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}
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EXPORT void CALLBACK CDVDconfigure()
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{
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configure();
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}
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EXPORT s32 CALLBACK CDVDtest()
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{
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return 0;
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}
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