/***************************************************************************
video.c
Core MAME video routines.
****************************************************************************
Copyright Aaron Giles
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#include "emu.h"
#include "emuopts.h"
#include "png.h"
#include "debugger.h"
#include "debugint/debugint.h"
#include "ui.h"
#include "aviio.h"
#include "crsshair.h"
#include "rendersw.c"
#include "snap.lh"
//**************************************************************************
// DEBUGGING
//**************************************************************************
#define LOG_THROTTLE (0)
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// frameskipping tables
const UINT8 video_manager::s_skiptable[FRAMESKIP_LEVELS][FRAMESKIP_LEVELS] =
{
{ 0,0,0,0,0,0,0,0,0,0,0,0 },
{ 0,0,0,0,0,0,0,0,0,0,0,1 },
{ 0,0,0,0,0,1,0,0,0,0,0,1 },
{ 0,0,0,1,0,0,0,1,0,0,0,1 },
{ 0,0,1,0,0,1,0,0,1,0,0,1 },
{ 0,1,0,0,1,0,1,0,0,1,0,1 },
{ 0,1,0,1,0,1,0,1,0,1,0,1 },
{ 0,1,0,1,1,0,1,0,1,1,0,1 },
{ 0,1,1,0,1,1,0,1,1,0,1,1 },
{ 0,1,1,1,0,1,1,1,0,1,1,1 },
{ 0,1,1,1,1,1,0,1,1,1,1,1 },
{ 0,1,1,1,1,1,1,1,1,1,1,1 }
};
//**************************************************************************
// VIDEO MANAGER
//**************************************************************************
//-------------------------------------------------
// video_manager - constructor
//-------------------------------------------------
video_manager::video_manager(running_machine &machine)
: m_machine(machine),
m_screenless_frame_timer(NULL),
m_throttle_last_ticks(0),
m_throttle_realtime(attotime::zero),
m_throttle_emutime(attotime::zero),
m_throttle_history(0),
m_speed_last_realtime(0),
m_speed_last_emutime(attotime::zero),
m_speed_percent(1.0),
m_overall_real_seconds(0),
m_overall_real_ticks(0),
m_overall_emutime(attotime::zero),
m_overall_valid_counter(0),
m_throttle(machine.options().throttle()),
m_fastforward(false),
m_seconds_to_run(machine.options().seconds_to_run()),
m_auto_frameskip(machine.options().auto_frameskip()),
m_speed(original_speed_setting()),
m_empty_skip_count(0),
m_frameskip_level(machine.options().frameskip()),
m_frameskip_counter(0),
m_frameskip_adjust(0),
m_skipping_this_frame(false),
m_average_oversleep(0),
m_snap_target(NULL),
m_snap_native(true),
m_snap_width(0),
m_snap_height(0),
m_mngfile(NULL),
m_avifile(NULL),
m_movie_frame_period(attotime::zero),
m_movie_next_frame_time(attotime::zero),
m_movie_frame(0)
{
// request a callback upon exiting
machine.add_notifier(MACHINE_NOTIFY_EXIT, machine_notify_delegate(FUNC(video_manager::exit), this));
machine.save().register_postload(save_prepost_delegate(FUNC(video_manager::postload), this));
// extract initial execution state from global configuration settings
update_refresh_speed();
// create a render target for snapshots
const char *viewname = machine.options().snap_view();
m_snap_native = (machine.primary_screen != NULL && (viewname[0] == 0 || strcmp(viewname, "native") == 0));
// the native target is hard-coded to our internal layout and has all options disabled
if (m_snap_native)
{
m_snap_target = machine.render().target_alloc(layout_snap, RENDER_CREATE_SINGLE_FILE | RENDER_CREATE_HIDDEN);
m_snap_target->set_backdrops_enabled(false);
m_snap_target->set_overlays_enabled(false);
m_snap_target->set_bezels_enabled(false);
m_snap_target->set_cpanels_enabled(false);
m_snap_target->set_marquees_enabled(false);
m_snap_target->set_screen_overlay_enabled(false);
m_snap_target->set_zoom_to_screen(false);
}
// other targets select the specified view and turn off effects
else
{
m_snap_target = machine.render().target_alloc(NULL, RENDER_CREATE_HIDDEN);
m_snap_target->set_view(m_snap_target->configured_view(viewname, 0, 1));
m_snap_target->set_screen_overlay_enabled(false);
}
// extract snap resolution if present
if (sscanf(machine.options().snap_size(), "%dx%d", &m_snap_width, &m_snap_height) != 2)
m_snap_width = m_snap_height = 0;
// start recording movie if specified
const char *filename = machine.options().mng_write();
if (filename[0] != 0)
begin_recording(filename, MF_MNG);
filename = machine.options().avi_write();
if (filename[0] != 0)
begin_recording(filename, MF_AVI);
// if no screens, create a periodic timer to drive updates
if (machine.primary_screen == NULL)
{
m_screenless_frame_timer = machine.scheduler().timer_alloc(timer_expired_delegate(FUNC(video_manager::screenless_update_callback), this));
m_screenless_frame_timer->adjust(screen_device::DEFAULT_FRAME_PERIOD, 0, screen_device::DEFAULT_FRAME_PERIOD);
}
}
//-------------------------------------------------
// set_frameskip - set the current actual
// frameskip (-1 means autoframeskip)
//-------------------------------------------------
void video_manager::set_frameskip(int frameskip)
{
// -1 means autoframeskip
if (frameskip == -1)
{
m_auto_frameskip = true;
m_frameskip_level = 0;
}
// any other level is a direct control
else if (frameskip >= 0 && frameskip <= MAX_FRAMESKIP)
{
m_auto_frameskip = false;
m_frameskip_level = frameskip;
}
}
//-------------------------------------------------
// frame_update - handle frameskipping and UI,
// plus updating the screen during normal
// operations
//-------------------------------------------------
void video_manager::frame_update(bool debug)
{
// only render sound and video if we're in the running phase
int phase = machine().phase();
bool skipped_it = m_skipping_this_frame;
if (phase == MACHINE_PHASE_RUNNING && (!machine().paused() || machine().options().update_in_pause()))
{
bool anything_changed = finish_screen_updates();
// if none of the screens changed and we haven't skipped too many frames in a row,
// mark this frame as skipped to prevent throttling; this helps for games that
// don't update their screen at the monitor refresh rate
if (!anything_changed && !m_auto_frameskip && m_frameskip_level == 0 && m_empty_skip_count++ < 3)
skipped_it = true;
else
m_empty_skip_count = 0;
}
// draw the user interface
ui_update_and_render(machine(), &machine().render().ui_container());
// update the internal render debugger
debugint_update_during_game(machine());
// if we're throttling, synchronize before rendering
attotime current_time = machine().time();
if (!debug && !skipped_it && effective_throttle())
update_throttle(current_time);
// ask the OSD to update
g_profiler.start(PROFILER_BLIT);
machine().osd().update(!debug && skipped_it);
g_profiler.stop();
// perform tasks for this frame
if (!debug)
machine().call_notifiers(MACHINE_NOTIFY_FRAME);
// update frameskipping
if (!debug)
update_frameskip();
// update speed computations
if (!debug && !skipped_it)
recompute_speed(current_time);
// call the end-of-frame callback
if (phase == MACHINE_PHASE_RUNNING)
{
// reset partial updates if we're paused or if the debugger is active
if (machine().primary_screen != NULL && (machine().paused() || debug || debugger_within_instruction_hook(machine())))
machine().primary_screen->reset_partial_updates();
}
}
//-------------------------------------------------
// speed_text - print the text to be displayed
// into a string buffer
//-------------------------------------------------
astring &video_manager::speed_text(astring &string)
{
string.reset();
// if we're paused, just display Paused
bool paused = machine().paused();
if (paused)
string.cat("paused");
// if we're fast forwarding, just display Fast-forward
else if (m_fastforward)
string.cat("fast ");
// if we're auto frameskipping, display that plus the level
else if (effective_autoframeskip())
string.catprintf("auto%2d/%d", effective_frameskip(), MAX_FRAMESKIP);
// otherwise, just display the frameskip plus the level
else
string.catprintf("skip %d/%d", effective_frameskip(), MAX_FRAMESKIP);
// append the speed for all cases except paused
if (!paused)
string.catprintf("%4d%%", (int)(100 * m_speed_percent + 0.5));
// display the number of partial updates as well
int partials = 0;
screen_device_iterator iter(machine().root_device());
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
partials += screen->partial_updates();
if (partials > 1)
string.catprintf("\n%d partial updates", partials);
return string;
}
//-------------------------------------------------
// save_snapshot - save a snapshot to the given
// file handle
//-------------------------------------------------
void video_manager::save_snapshot(screen_device *screen, emu_file &file)
{
// validate
assert(!m_snap_native || screen != NULL);
// create the bitmap to pass in
create_snapshot_bitmap(screen);
// add two text entries describing the image
astring text1(emulator_info::get_appname(), " ", build_version);
astring text2(machine().system().manufacturer, " ", machine().system().description);
png_info pnginfo = { 0 };
png_add_text(&pnginfo, "Software", text1);
png_add_text(&pnginfo, "System", text2);
// now do the actual work
const rgb_t *palette = (machine().palette != NULL) ? palette_entry_list_adjusted(machine().palette) : NULL;
png_error error = png_write_bitmap(file, &pnginfo, m_snap_bitmap, machine().total_colors(), palette);
if (error != PNGERR_NONE)
mame_printf_error("Error generating PNG for snapshot: png_error = %d\n", error);
// free any data allocated
png_free(&pnginfo);
}
//-------------------------------------------------
// save_active_screen_snapshots - save a
// snapshot of all active screens
//-------------------------------------------------
void video_manager::save_active_screen_snapshots()
{
// if we're native, then write one snapshot per visible screen
if (m_snap_native)
{
// write one snapshot per visible screen
screen_device_iterator iter(machine().root_device());
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
if (machine().render().is_live(*screen))
{
emu_file file(machine().options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
file_error filerr = open_next(file, "png");
if (filerr == FILERR_NONE)
save_snapshot(screen, file);
}
}
// otherwise, just write a single snapshot
else
{
emu_file file(machine().options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
file_error filerr = open_next(file, "png");
if (filerr == FILERR_NONE)
save_snapshot(NULL, file);
}
}
//-------------------------------------------------
// begin_recording - begin recording of a movie
//-------------------------------------------------
void video_manager::begin_recording(const char *name, movie_format format)
{
// stop any existign recording
end_recording();
// create a snapshot bitmap so we know what the target size is
create_snapshot_bitmap(NULL);
// reset the state
m_movie_frame = 0;
m_movie_next_frame_time = machine().time();
// start up an AVI recording
if (format == MF_AVI)
{
// build up information about this new movie
avi_movie_info info;
info.video_format = 0;
info.video_timescale = 1000 * ((machine().primary_screen != NULL) ? ATTOSECONDS_TO_HZ(machine().primary_screen->frame_period().attoseconds) : screen_device::DEFAULT_FRAME_RATE);
info.video_sampletime = 1000;
info.video_numsamples = 0;
info.video_width = m_snap_bitmap.width();
info.video_height = m_snap_bitmap.height();
info.video_depth = 24;
info.audio_format = 0;
info.audio_timescale = machine().sample_rate();
info.audio_sampletime = 1;
info.audio_numsamples = 0;
info.audio_channels = 2;
info.audio_samplebits = 16;
info.audio_samplerate = machine().sample_rate();
// create a new temporary movie file
file_error filerr;
astring fullpath;
{
emu_file tempfile(machine().options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
if (name != NULL)
filerr = tempfile.open(name);
else
filerr = open_next(tempfile, "avi");
// compute the frame time
m_movie_frame_period = attotime::from_seconds(1000) / info.video_timescale;
// if we succeeded, make a copy of the name and create the real file over top
if (filerr == FILERR_NONE)
fullpath = tempfile.fullpath();
}
if (filerr == FILERR_NONE)
{
// create the file and free the string
avi_error avierr = avi_create(fullpath, &info, &m_avifile);
if (avierr != AVIERR_NONE)
mame_printf_error("Error creating AVI: %s\n", avi_error_string(avierr));
}
}
// start up a MNG recording
else if (format == MF_MNG)
{
// create a new movie file and start recording
m_mngfile = auto_alloc(machine(), emu_file(machine().options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS));
file_error filerr;
if (name != NULL)
filerr = m_mngfile->open(name);
else
filerr = open_next(*m_mngfile, "mng");
if (filerr == FILERR_NONE)
{
// start the capture
int rate = (machine().primary_screen != NULL) ? ATTOSECONDS_TO_HZ(machine().primary_screen->frame_period().attoseconds) : screen_device::DEFAULT_FRAME_RATE;
png_error pngerr = mng_capture_start(*m_mngfile, m_snap_bitmap, rate);
if (pngerr != PNGERR_NONE)
return end_recording();
// compute the frame time
m_movie_frame_period = attotime::from_hz(rate);
}
else
{
mame_printf_error("Error creating MNG\n");
global_free(m_mngfile);
m_mngfile = NULL;
}
}
}
//-------------------------------------------------
// end_recording - stop recording of a movie
//-------------------------------------------------
void video_manager::end_recording()
{
// close the file if it exists
if (m_avifile != NULL)
{
avi_close(m_avifile);
m_avifile = NULL;
}
// close the file if it exists
if (m_mngfile != NULL)
{
mng_capture_stop(*m_mngfile);
auto_free(machine(), m_mngfile);
m_mngfile = NULL;
}
// reset the state
m_movie_frame = 0;
}
//-------------------------------------------------
// add_sound_to_recording - add sound to a movie
// recording
//-------------------------------------------------
void video_manager::add_sound_to_recording(const INT16 *sound, int numsamples)
{
// only record if we have a file
if (m_avifile != NULL)
{
g_profiler.start(PROFILER_MOVIE_REC);
// write the next frame
avi_error avierr = avi_append_sound_samples(m_avifile, 0, sound + 0, numsamples, 1);
if (avierr == AVIERR_NONE)
avierr = avi_append_sound_samples(m_avifile, 1, sound + 1, numsamples, 1);
if (avierr != AVIERR_NONE)
end_recording();
g_profiler.stop();
}
}
//-------------------------------------------------
// video_exit - close down the video system
//-------------------------------------------------
void video_manager::exit()
{
// stop recording any movie
end_recording();
// free all the graphics elements
for (int i = 0; i < MAX_GFX_ELEMENTS; i++)
auto_free(machine(), machine().gfx[i]);
// free the snapshot target
machine().render().target_free(m_snap_target);
m_snap_bitmap.reset();
// print a final result if we have at least 2 seconds' worth of data
if (m_overall_emutime.seconds >= 1)
{
osd_ticks_t tps = osd_ticks_per_second();
double final_real_time = (double)m_overall_real_seconds + (double)m_overall_real_ticks / (double)tps;
double final_emu_time = m_overall_emutime.as_double();
mame_printf_info("Average speed: %.2f%% (%d seconds)\n", 100 * final_emu_time / final_real_time, (m_overall_emutime + attotime(0, ATTOSECONDS_PER_SECOND / 2)).seconds);
}
}
//-------------------------------------------------
// screenless_update_callback - update generator
// when there are no screens to drive it
//-------------------------------------------------
void video_manager::screenless_update_callback(void *ptr, int param)
{
// force an update
frame_update(false);
}
//-------------------------------------------------
// postload - callback for resetting things after
// state has been loaded
//-------------------------------------------------
void video_manager::postload()
{
m_movie_next_frame_time = machine().time();
}
//-------------------------------------------------
// effective_autoframeskip - return the effective
// autoframeskip value, accounting for fast
// forward
//-------------------------------------------------
inline int video_manager::effective_autoframeskip() const
{
// if we're fast forwarding or paused, autoframeskip is disabled
if (m_fastforward || machine().paused())
return false;
// otherwise, it's up to the user
return m_auto_frameskip;
}
//-------------------------------------------------
// effective_frameskip - return the effective
// frameskip value, accounting for fast
// forward
//-------------------------------------------------
inline int video_manager::effective_frameskip() const
{
// if we're fast forwarding, use the maximum frameskip
if (m_fastforward)
return FRAMESKIP_LEVELS - 1;
// otherwise, it's up to the user
return m_frameskip_level;
}
//-------------------------------------------------
// effective_throttle - return the effective
// throttle value, accounting for fast
// forward and user interface
//-------------------------------------------------
inline bool video_manager::effective_throttle() const
{
// if we're paused, or if the UI is active, we always throttle
if (machine().paused() || ui_is_menu_active())
return true;
// if we're fast forwarding, we don't throttle
if (m_fastforward)
return false;
// otherwise, it's up to the user
return m_throttle;
}
//-------------------------------------------------
// original_speed_setting - return the original
// speed setting
//-------------------------------------------------
inline int video_manager::original_speed_setting() const
{
return machine().options().speed() * 1000.0 + 0.5;
}
//-------------------------------------------------
// finish_screen_updates - finish updating all
// the screens
//-------------------------------------------------
bool video_manager::finish_screen_updates()
{
// finish updating the screens
screen_device_iterator iter(machine().root_device());
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
screen->update_partial(screen->visible_area().max_y);
// now add the quads for all the screens
bool anything_changed = false;
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
if (screen->update_quads())
anything_changed = true;
// update our movie recording and burn-in state
if (!machine().paused())
{
record_frame();
// iterate over screens and update the burnin for the ones that care
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
screen->update_burnin();
}
// draw any crosshairs
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
crosshair_render(*screen);
return anything_changed;
}
//-------------------------------------------------
// update_throttle - throttle to the game's
// natural speed
//-------------------------------------------------
void video_manager::update_throttle(attotime emutime)
{
/*
Throttling theory:
This routine is called periodically with an up-to-date emulated time.
The idea is to synchronize real time with emulated time. We do this
by "throttling", or waiting for real time to catch up with emulated
time.
In an ideal world, it will take less real time to emulate and render
each frame than the emulated time, so we need to slow things down to
get both times in sync.
There are many complications to this model:
* some games run too slow, so each frame we get further and
further behind real time; our only choice here is to not
throttle
* some games have very uneven frame rates; one frame will take
a long time to emulate, and the next frame may be very fast
* we run on top of multitasking OSes; sometimes execution time
is taken away from us, and this means we may not get enough
time to emulate one frame
* we may be paused, and emulated time may not be marching
forward
* emulated time could jump due to resetting the machine or
restoring from a saved state
*/
static const UINT8 popcount[256] =
{
0,1,1,2,1,2,2,3, 1,2,2,3,2,3,3,4, 1,2,2,3,2,3,3,4, 2,3,3,4,3,4,4,5,
1,2,2,3,2,3,3,4, 2,3,3,4,3,4,4,5, 2,3,3,4,3,4,4,5, 3,4,4,5,4,5,5,6,
1,2,2,3,2,3,3,4, 2,3,3,4,3,4,4,5, 2,3,3,4,3,4,4,5, 3,4,4,5,4,5,5,6,
2,3,3,4,3,4,4,5, 3,4,4,5,4,5,5,6, 3,4,4,5,4,5,5,6, 4,5,5,6,5,6,6,7,
1,2,2,3,2,3,3,4, 2,3,3,4,3,4,4,5, 2,3,3,4,3,4,4,5, 3,4,4,5,4,5,5,6,
2,3,3,4,3,4,4,5, 3,4,4,5,4,5,5,6, 3,4,4,5,4,5,5,6, 4,5,5,6,5,6,6,7,
2,3,3,4,3,4,4,5, 3,4,4,5,4,5,5,6, 3,4,4,5,4,5,5,6, 4,5,5,6,5,6,6,7,
3,4,4,5,4,5,5,6, 4,5,5,6,5,6,6,7, 4,5,5,6,5,6,6,7, 5,6,6,7,6,7,7,8
};
// outer scope so we can break out in case of a resync
while (1)
{
// apply speed factor to emu time
if (m_speed != 0 && m_speed != 1000)
{
// multiply emutime by 1000, then divide by the global speed factor
emutime = (emutime * 1000) / m_speed;
}
// compute conversion factors up front
osd_ticks_t ticks_per_second = osd_ticks_per_second();
attoseconds_t attoseconds_per_tick = ATTOSECONDS_PER_SECOND / ticks_per_second;
// if we're paused, emutime will not advance; instead, we subtract a fixed
// amount of time (1/60th of a second) from the emulated time that was passed in,
// and explicitly reset our tracked real and emulated timers to that value ...
// this means we pretend that the last update was exactly 1/60th of a second
// ago, and was in sync in both real and emulated time
if (machine().paused())
{
m_throttle_emutime = emutime - attotime(0, ATTOSECONDS_PER_SECOND / PAUSED_REFRESH_RATE);
m_throttle_realtime = m_throttle_emutime;
}
// attempt to detect anomalies in the emulated time by subtracting the previously
// reported value from our current value; this should be a small value somewhere
// between 0 and 1/10th of a second ... anything outside of this range is obviously
// wrong and requires a resync
attoseconds_t emu_delta_attoseconds = (emutime - m_throttle_emutime).as_attoseconds();
if (emu_delta_attoseconds < 0 || emu_delta_attoseconds > ATTOSECONDS_PER_SECOND / 10)
{
if (LOG_THROTTLE)
logerror("Resync due to weird emutime delta: %s\n", attotime(0, emu_delta_attoseconds).as_string(18));
break;
}
// now determine the current real time in OSD-specified ticks; we have to be careful
// here because counters can wrap, so we only use the difference between the last
// read value and the current value in our computations
osd_ticks_t diff_ticks = osd_ticks() - m_throttle_last_ticks;
m_throttle_last_ticks += diff_ticks;
// if it has been more than a full second of real time since the last call to this
// function, we just need to resynchronize
if (diff_ticks >= ticks_per_second)
{
if (LOG_THROTTLE)
logerror("Resync due to real time advancing by more than 1 second\n");
break;
}
// convert this value into attoseconds for easier comparison
attoseconds_t real_delta_attoseconds = diff_ticks * attoseconds_per_tick;
// now update our real and emulated timers with the current values
m_throttle_emutime = emutime;
m_throttle_realtime += attotime(0, real_delta_attoseconds);
// keep a history of whether or not emulated time beat real time over the last few
// updates; this can be used for future heuristics
m_throttle_history = (m_throttle_history << 1) | (emu_delta_attoseconds > real_delta_attoseconds);
// determine how far ahead real time is versus emulated time; note that we use the
// accumulated times for this instead of the deltas for the current update because
// we want to track time over a longer duration than a single update
attoseconds_t real_is_ahead_attoseconds = (m_throttle_emutime - m_throttle_realtime).as_attoseconds();
// if we're more than 1/10th of a second out, or if we are behind at all and emulation
// is taking longer than the real frame, we just need to resync
if (real_is_ahead_attoseconds < -ATTOSECONDS_PER_SECOND / 10 ||
(real_is_ahead_attoseconds < 0 && popcount[m_throttle_history & 0xff] < 6))
{
if (LOG_THROTTLE)
logerror("Resync due to being behind: %s (history=%08X)\n", attotime(0, -real_is_ahead_attoseconds).as_string(18), m_throttle_history);
break;
}
// if we're behind, it's time to just get out
if (real_is_ahead_attoseconds < 0)
return;
// compute the target real time, in ticks, where we want to be
osd_ticks_t target_ticks = m_throttle_last_ticks + real_is_ahead_attoseconds / attoseconds_per_tick;
// throttle until we read the target, and update real time to match the final time
diff_ticks = throttle_until_ticks(target_ticks) - m_throttle_last_ticks;
m_throttle_last_ticks += diff_ticks;
m_throttle_realtime += attotime(0, diff_ticks * attoseconds_per_tick);
return;
}
// reset realtime and emutime to the same value
m_throttle_realtime = m_throttle_emutime = emutime;
}
//-------------------------------------------------
// throttle_until_ticks - spin until the
// specified target time, calling the OSD code
// to sleep if possible
//-------------------------------------------------
osd_ticks_t video_manager::throttle_until_ticks(osd_ticks_t target_ticks)
{
// we're allowed to sleep via the OSD code only if we're configured to do so
// and we're not frameskipping due to autoframeskip, or if we're paused
bool allowed_to_sleep = false;
if (machine().options().sleep() && (!effective_autoframeskip() || effective_frameskip() == 0))
allowed_to_sleep = true;
if (machine().paused())
allowed_to_sleep = true;
// loop until we reach our target
g_profiler.start(PROFILER_IDLE);
osd_ticks_t minimum_sleep = osd_ticks_per_second() / 1000;
osd_ticks_t current_ticks = osd_ticks();
while (current_ticks < target_ticks)
{
// compute how much time to sleep for, taking into account the average oversleep
osd_ticks_t delta = (target_ticks - current_ticks) * 1000 / (1000 + m_average_oversleep);
// see if we can sleep
bool slept = false;
if (allowed_to_sleep && delta >= minimum_sleep)
{
osd_sleep(delta);
slept = true;
}
// read the new value
osd_ticks_t new_ticks = osd_ticks();
// keep some metrics on the sleeping patterns of the OSD layer
if (slept)
{
// if we overslept, keep an average of the amount
osd_ticks_t actual_ticks = new_ticks - current_ticks;
if (actual_ticks > delta)
{
// take 90% of the previous average plus 10% of the new value
osd_ticks_t oversleep_milliticks = 1000 * (actual_ticks - delta) / delta;
m_average_oversleep = (m_average_oversleep * 99 + oversleep_milliticks) / 100;
if (LOG_THROTTLE)
logerror("Slept for %d ticks, got %d ticks, avgover = %d\n", (int)delta, (int)actual_ticks, (int)m_average_oversleep);
}
}
current_ticks = new_ticks;
}
g_profiler.stop();
return current_ticks;
}
//-------------------------------------------------
// update_frameskip - update frameskipping
// counters and periodically update autoframeskip
//-------------------------------------------------
void video_manager::update_frameskip()
{
// if we're throttling and autoframeskip is on, adjust
if (effective_throttle() && effective_autoframeskip() && m_frameskip_counter == 0)
{
// if we're too fast, attempt to increase the frameskip
double speed = m_speed * 0.001;
if (m_speed_percent >= 0.995 * speed)
{
// but only after 3 consecutive frames where we are too fast
if (++m_frameskip_adjust >= 3)
{
m_frameskip_adjust = 0;
if (m_frameskip_level > 0)
m_frameskip_level--;
}
}
// if we're too slow, attempt to increase the frameskip
else
{
// if below 80% speed, be more aggressive
if (m_speed_percent < 0.80 * speed)
m_frameskip_adjust -= (0.90 * speed - m_speed_percent) / 0.05;
// if we're close, only force it up to frameskip 8
else if (m_frameskip_level < 8)
m_frameskip_adjust--;
// perform the adjustment
while (m_frameskip_adjust <= -2)
{
m_frameskip_adjust += 2;
if (m_frameskip_level < MAX_FRAMESKIP)
m_frameskip_level++;
}
}
}
// increment the frameskip counter and determine if we will skip the next frame
m_frameskip_counter = (m_frameskip_counter + 1) % FRAMESKIP_LEVELS;
m_skipping_this_frame = s_skiptable[effective_frameskip()][m_frameskip_counter];
}
//-------------------------------------------------
// update_refresh_speed - update the m_speed
// based on the maximum refresh rate supported
//-------------------------------------------------
void video_manager::update_refresh_speed()
{
// only do this if the refreshspeed option is used
if (machine().options().refresh_speed())
{
float minrefresh = machine().render().max_update_rate();
if (minrefresh != 0)
{
// find the screen with the shortest frame period (max refresh rate)
// note that we first check the token since this can get called before all screens are created
attoseconds_t min_frame_period = ATTOSECONDS_PER_SECOND;
screen_device_iterator iter(machine().root_device());
for (screen_device *screen = iter.first(); screen != NULL; screen = iter.next())
{
attoseconds_t period = screen->frame_period().attoseconds;
if (period != 0)
min_frame_period = MIN(min_frame_period, period);
}
// compute a target speed as an integral percentage
// note that we lop 0.25Hz off of the minrefresh when doing the computation to allow for
// the fact that most refresh rates are not accurate to 10 digits...
UINT32 target_speed = floor((minrefresh - 0.25f) * 1000.0 / ATTOSECONDS_TO_HZ(min_frame_period));
UINT32 original_speed = original_speed_setting();
target_speed = MIN(target_speed, original_speed);
// if we changed, log that verbosely
if (target_speed != m_speed)
{
mame_printf_verbose("Adjusting target speed to %.1f%% (hw=%.2fHz, game=%.2fHz, adjusted=%.2fHz)\n", target_speed / 10.0, minrefresh, ATTOSECONDS_TO_HZ(min_frame_period), ATTOSECONDS_TO_HZ(min_frame_period * 1000.0 / target_speed));
m_speed = target_speed;
}
}
}
}
//-------------------------------------------------
// recompute_speed - recompute the current
// overall speed; we assume this is called only
// if we did not skip a frame
//-------------------------------------------------
void video_manager::recompute_speed(attotime emutime)
{
// if we don't have a starting time yet, or if we're paused, reset our starting point
if (m_speed_last_realtime == 0 || machine().paused())
{
m_speed_last_realtime = osd_ticks();
m_speed_last_emutime = emutime;
}
// if it has been more than the update interval, update the time
attotime delta_emutime = emutime - m_speed_last_emutime;
if (delta_emutime > attotime(0, ATTOSECONDS_PER_SPEED_UPDATE))
{
// convert from ticks to attoseconds
osd_ticks_t realtime = osd_ticks();
osd_ticks_t delta_realtime = realtime - m_speed_last_realtime;
osd_ticks_t tps = osd_ticks_per_second();
m_speed_percent = delta_emutime.as_double() * (double)tps / (double)delta_realtime;
// remember the last times
m_speed_last_realtime = realtime;
m_speed_last_emutime = emutime;
// if we're throttled, this time period counts for overall speed; otherwise, we reset the counter
if (!m_fastforward)
m_overall_valid_counter++;
else
m_overall_valid_counter = 0;
// if we've had at least 4 consecutive valid periods, accumulate stats
if (m_overall_valid_counter >= 4)
{
m_overall_real_ticks += delta_realtime;
while (m_overall_real_ticks >= tps)
{
m_overall_real_ticks -= tps;
m_overall_real_seconds++;
}
m_overall_emutime += delta_emutime;
}
}
// if we're past the "time-to-execute" requested, signal an exit
if (m_seconds_to_run != 0 && emutime.seconds >= m_seconds_to_run)
{
if (machine().primary_screen != NULL)
{
// create a final screenshot
emu_file file(machine().options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
file_error filerr = file.open(machine().basename(), PATH_SEPARATOR "final.png");
if (filerr == FILERR_NONE)
save_snapshot(machine().primary_screen, file);
}
// schedule our demise
machine().schedule_exit();
}
}
//-------------------------------------------------
// create_snapshot_bitmap - creates a
// bitmap containing the screenshot for the
// given screen
//-------------------------------------------------
void video_manager::create_snapshot_bitmap(screen_device *screen)
{
// select the appropriate view in our dummy target
if (m_snap_native && screen != NULL)
{
screen_device_iterator iter(machine().root_device());
int view_index = iter.indexof(*screen);
assert(view_index != -1);
m_snap_target->set_view(view_index);
}
// get the minimum width/height and set it on the target
INT32 width = m_snap_width;
INT32 height = m_snap_height;
if (width == 0 || height == 0)
m_snap_target->compute_minimum_size(width, height);
m_snap_target->set_bounds(width, height);
// if we don't have a bitmap, or if it's not the right size, allocate a new one
if (!m_snap_bitmap.valid() || width != m_snap_bitmap.width() || height != m_snap_bitmap.height())
m_snap_bitmap.allocate(width, height);
// render the screen there
render_primitive_list &primlist = m_snap_target->get_primitives();
primlist.acquire_lock();
software_renderer<UINT32, 0,0,0, 16,8,0, false, true>::draw_primitives(primlist, &m_snap_bitmap.pix32(0), width, height, m_snap_bitmap.rowpixels());
primlist.release_lock();
}
//-------------------------------------------------
// open_next - open the next non-existing file of
// type filetype according to our numbering
// scheme
//-------------------------------------------------
file_error video_manager::open_next(emu_file &file, const char *extension)
{
UINT32 origflags = file.openflags();
// handle defaults
const char *snapname = machine().options().snap_name();
if (snapname == NULL || snapname[0] == 0)
snapname = "%g/%i";
astring snapstr(snapname);
// strip any extension in the provided name
int index = snapstr.rchr(0, '.');
if (index != -1)
snapstr.substr(0, index);
// handle %d in the template (for image devices)
astring snapdev("%d_");
int pos = snapstr.find(0, snapdev);
if (pos != -1)
{
// if more %d are found, revert to default and ignore them all
if (snapstr.find(pos + 3, snapdev) != -1)
snapstr.cpy("%g/%i");
// else if there is a single %d, try to create the correct snapname
else
{
int name_found = 0;
// find length of the device name
int end1 = snapstr.find(pos + 3, "/");
int end2 = snapstr.find(pos + 3, "%");
int end = -1;
if ((end1 != -1) && (end2 != -1))
end = MIN(end1, end2);
else if (end1 != -1)
end = end1;
else if (end2 != -1)
end = end2;
else
end = snapstr.len();
if (end - pos < 3)
fatalerror("Something very wrong is going on!!!\n");
// copy the device name to an astring
astring snapdevname;
snapdevname.cpysubstr(snapstr, pos + 3, end - pos - 3);
//printf("check template: %s\n", snapdevname.cstr());
// verify that there is such a device for this system
image_interface_iterator iter(machine().root_device());
for (device_image_interface *image = iter.first(); image != NULL; image = iter.next())
{
// get the device name
astring tempdevname(image->brief_instance_name());
//printf("check device: %s\n", tempdevname.cstr());
if (snapdevname.cmp(tempdevname) == 0)
{
// verify that such a device has an image mounted
if (image->basename() != NULL)
{
astring filename(image->basename());
// strip extension
filename.substr(0, filename.rchr(0, '.'));
// setup snapname and remove the %d_
snapstr.replace(0, snapdevname, filename);
snapstr.del(pos, 3);
//printf("check image: %s\n", filename.cstr());
name_found = 1;
}
}
}
// or fallback to default
if (name_found == 0)
snapstr.cpy("%g/%i");
}
}
// add our own extension
snapstr.cat(".").cat(extension);
// substitute path and gamename up front
snapstr.replace(0, "/", PATH_SEPARATOR);
snapstr.replace(0, "%g", machine().basename());
// determine if the template has an index; if not, we always use the same name
astring fname;
if (snapstr.find(0, "%i") == -1)
fname.cpy(snapstr);
// otherwise, we scan for the next available filename
else
{
// try until we succeed
astring seqtext;
file.set_openflags(OPEN_FLAG_READ);
for (int seq = 0; ; seq++)
{
// build up the filename
fname.cpy(snapstr).replace(0, "%i", seqtext.format("%04d", seq).cstr());
// try to open the file; stop when we fail
file_error filerr = file.open(fname);
if (filerr != FILERR_NONE)
break;
}
}
// create the final file
file.set_openflags(origflags);
return file.open(fname);
}
//-------------------------------------------------
// record_frame - record a frame of a movie
//-------------------------------------------------
void video_manager::record_frame()
{
// ignore if nothing to do
if (m_mngfile == NULL && m_avifile == NULL)
return;
// start the profiler and get the current time
g_profiler.start(PROFILER_MOVIE_REC);
attotime curtime = machine().time();
// create the bitmap
create_snapshot_bitmap(NULL);
// loop until we hit the right time
while (m_movie_next_frame_time <= curtime)
{
// handle an AVI recording
if (m_avifile != NULL)
{
// write the next frame
avi_error avierr = avi_append_video_frame(m_avifile, m_snap_bitmap);
if (avierr != AVIERR_NONE)
{
g_profiler.stop();
return end_recording();
}
}
// handle a MNG recording
if (m_mngfile != NULL)
{
// set up the text fields in the movie info
png_info pnginfo = { 0 };
if (m_movie_frame == 0)
{
astring text1(emulator_info::get_appname(), " ", build_version);
astring text2(machine().system().manufacturer, " ", machine().system().description);
png_add_text(&pnginfo, "Software", text1);
png_add_text(&pnginfo, "System", text2);
}
// write the next frame
const rgb_t *palette = (machine().palette != NULL) ? palette_entry_list_adjusted(machine().palette) : NULL;
png_error error = mng_capture_frame(*m_mngfile, &pnginfo, m_snap_bitmap, machine().total_colors(), palette);
png_free(&pnginfo);
if (error != PNGERR_NONE)
{
g_profiler.stop();
return end_recording();
}
}
// advance time
m_movie_next_frame_time += m_movie_frame_period;
m_movie_frame++;
}
g_profiler.stop();
}
/*-------------------------------------------------
video_assert_out_of_range_pixels - assert if
any pixels in the given bitmap contain an
invalid palette index
-------------------------------------------------*/
bool video_assert_out_of_range_pixels(running_machine &machine, bitmap_ind16 &bitmap)
{
#ifdef MAME_DEBUG
// iterate over rows
int maxindex = palette_get_max_index(machine.palette);
for (int y = 0; y < bitmap.height(); y++)
{
UINT16 *rowbase = &bitmap.pix16(y);
for (int x = 0; x < bitmap.width(); x++)
if (rowbase[x] > maxindex)
{
osd_break_into_debugger("Out of range pixel");
return true;
}
}
#endif
return false;
}