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DVDInterface: code cleanup.

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This commit is contained in:
magumagu 2014-05-08 11:47:38 -07:00
parent f123e08731
commit 4f5421ffb5
1 changed files with 14 additions and 12 deletions
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26
Source/Core/Core/HW/DVDInterface.cpp
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@ -677,14 +677,18 @@ void ExecuteCommand()
// and 3MB/sec for reads outside 1MB, acceleated reads // and 3MB/sec for reads outside 1MB, acceleated reads
// within 1MB. We can refine this if someone comes up // within 1MB. We can refine this if someone comes up
// with a more complete model for seek times. // with a more complete model for seek times.
u64 cur_time = CoreTiming::GetTicks(); u64 cur_time = CoreTiming::GetTicks();
// Number of ticks it takes to seek and read directly from the disk.
u64 disk_read_duration = m_DILENGTH.Length *
(SystemTimers::GetTicksPerSecond() / DISC_TRANSFER_RATE_GC) +
SystemTimers::GetTicksPerSecond() / 1000 * DISC_ACCESS_TIME_MS;
if (iDVDOffset + m_DILENGTH.Length - g_last_read_offset > 1024 * 1024) if (iDVDOffset + m_DILENGTH.Length - g_last_read_offset > 1024 * 1024)
{ {
// No buffer; just use the simple seek time + read time. // No buffer; just use the simple seek time + read time.
DEBUG_LOG(DVDINTERFACE, "Seeking %lld bytes", s64(g_last_read_offset) - s64(iDVDOffset)); DEBUG_LOG(DVDINTERFACE, "Seeking %lld bytes", s64(g_last_read_offset) - s64(iDVDOffset));
ticksUntilTC = m_DILENGTH.Length * ticksUntilTC = disk_read_duration;
(SystemTimers::GetTicksPerSecond() / DISC_TRANSFER_RATE_GC);
ticksUntilTC += SystemTimers::GetTicksPerSecond() / 1000 * DISC_ACCESS_TIME_MS;
g_last_read_time = cur_time + ticksUntilTC; g_last_read_time = cur_time + ticksUntilTC;
} }
else else
@ -700,10 +704,6 @@ void ExecuteCommand()
// Number of ticks it takes to transfer the data from the buffer to memory. // Number of ticks it takes to transfer the data from the buffer to memory.
u64 buffer_read_duration = m_DILENGTH.Length * u64 buffer_read_duration = m_DILENGTH.Length *
(SystemTimers::GetTicksPerSecond() / BUFFER_TRANSFER_RATE_GC); (SystemTimers::GetTicksPerSecond() / BUFFER_TRANSFER_RATE_GC);
// Number of ticks it takes to seek and read directly from the disk.
u64 disk_read_duration = m_DILENGTH.Length *
(SystemTimers::GetTicksPerSecond() / DISC_TRANSFER_RATE_GC) +
SystemTimers::GetTicksPerSecond() / 1000 * DISC_ACCESS_TIME_MS;
if (cur_time > buffer_fill_time) if (cur_time > buffer_fill_time)
{ {
@ -719,21 +719,23 @@ void ExecuteCommand()
} }
else else
{ {
DEBUG_LOG(DVDINTERFACE, "Seeking %lld bytes", s64(g_last_read_offset) - s64(iDVDOffset)); DEBUG_LOG(DVDINTERFACE, "Short seek %lld bytes", s64(g_last_read_offset) - s64(iDVDOffset));
ticksUntilTC = disk_read_duration; ticksUntilTC = disk_read_duration;
g_last_read_time = CoreTiming::GetTicks() + ticksUntilTC; g_last_read_time = cur_time + ticksUntilTC;
} }
} }
g_last_read_offset = (iDVDOffset + m_DILENGTH.Length - 2048) & ~2047; g_last_read_offset = (iDVDOffset + m_DILENGTH.Length - 2048) & ~2047;
if (SConfig::GetInstance().m_LocalCoreStartupParameter.bFastDiscSpeed) if (SConfig::GetInstance().m_LocalCoreStartupParameter.bFastDiscSpeed)
{ {
// Make the virtual DVD drive much faster than a physical drive; // Make the virtual DVD drive much faster than a physical drive if
// most games aren't very sensitive to the speed, and everyone // the user requests it; most games aren't very sensitive to the speed,
// likes shorter load times. // and everyone likes shorter load times.
ticksUntilTC /= 8; ticksUntilTC /= 8;
} }
CoreTiming::ScheduleEvent((int)ticksUntilTC, tc); CoreTiming::ScheduleEvent((int)ticksUntilTC, tc);
// Early return; we'll finish executing the command in FinishExecuteRead. // Early return; we'll finish executing the command in FinishExecuteRead.
return; return;
} }