115 lines
2.6 KiB
C++
115 lines
2.6 KiB
C++
/*
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* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "pbd/windows_timer_utils.h"
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#include <windows.h>
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#include <mmsystem.h>
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#include "pbd/compose.h"
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#include "pbd/debug.h"
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#include "pbd/error.h"
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#include "pbd/i18n.h"
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#define DEBUG_TIMING(msg) DEBUG_TRACE (PBD::DEBUG::Timing, msg);
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namespace {
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static
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UINT&
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timer_resolution ()
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{
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static UINT timer_res_ms = 0;
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return timer_res_ms;
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}
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} // namespace
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namespace PBD {
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namespace MMTIMERS {
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bool
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get_min_resolution (uint32_t& min_resolution_ms)
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{
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TIMECAPS caps;
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if (timeGetDevCaps (&caps, sizeof(TIMECAPS)) != TIMERR_NOERROR) {
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DEBUG_TIMING ("Could not get timer device capabilities.\n");
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return false;
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}
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min_resolution_ms = caps.wPeriodMin;
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return true;
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}
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bool
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set_min_resolution ()
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{
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uint32_t min_resolution = 0;
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if (!get_min_resolution (min_resolution)) {
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return false;
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}
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if (!set_resolution (min_resolution)) {
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return false;
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}
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return true;
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}
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bool
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set_resolution (uint32_t timer_resolution_ms)
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{
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if (timer_resolution() != 0) {
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DEBUG_TIMING(
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"Timer resolution must be reset before setting new resolution.\n");
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}
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if (timeBeginPeriod(timer_resolution_ms) != TIMERR_NOERROR) {
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DEBUG_TIMING(
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string_compose("Could not set timer resolution to %1(ms)\n",
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timer_resolution_ms));
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return false;
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}
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timer_resolution() = timer_resolution_ms;
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DEBUG_TIMING (string_compose ("Multimedia timer resolution set to %1(ms)\n",
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timer_resolution_ms));
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return true;
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}
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bool
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reset_resolution ()
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{
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// You must match calls to timeBegin/EndPeriod with the same resolution
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if (timeEndPeriod(timer_resolution()) != TIMERR_NOERROR) {
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DEBUG_TIMING("Could not reset the Timer resolution.\n");
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return false;
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}
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DEBUG_TIMING("Reset the Timer resolution.\n");
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timer_resolution() = 0;
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return true;
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}
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} // namespace MMTIMERS
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} // namespace PBD
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