diff options
Diffstat (limited to 'indra/media_plugins/winmmshim/winmm_shim.cpp')
| -rw-r--r-- | indra/media_plugins/winmmshim/winmm_shim.cpp | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/indra/media_plugins/winmmshim/winmm_shim.cpp b/indra/media_plugins/winmmshim/winmm_shim.cpp index 9563a3b664..f7df3b19a0 100644 --- a/indra/media_plugins/winmmshim/winmm_shim.cpp +++ b/indra/media_plugins/winmmshim/winmm_shim.cpp @@ -2,25 +2,31 @@ * @file winmmshim.cpp * @brief controls volume level of process by intercepting calls to winmm.dll * - * $LicenseInfo:firstyear=2010&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2010, Linden Research, Inc. + * $LicenseInfo:firstyear=2010&license=viewergpl$ + * + * Copyright (c) 2010, Linden Research, Inc. * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License only. + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at + * http://secondlifegrid.net/programs/open_source/licensing/flossexception * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #include "forwarding_api.h" @@ -114,8 +120,8 @@ extern "C" { // zero out the audio buffer when muted memset(pwh->lpData, 0, pwh->dwBufferLength); } - else if (sVolumeLevel != 1.f) - { // need to apply volume level + else + { wave_out_map_t::iterator found_it = sWaveOuts.find(hwo); if (found_it != sWaveOuts.end()) { @@ -138,11 +144,10 @@ extern "C" // copy volume level 4 times into 64 bit MMX register __m64 volume_64 = _mm_set_pi16(volume_16, volume_16, volume_16, volume_16); - __m64* sample_64; - __m64* last_sample_64 = (__m64*)(pwh->lpData + pwh->dwBufferLength - sizeof(__m64)); + __m64 *sample_64; // for everything that can be addressed in 64 bit multiples... for (sample_64 = (__m64*)pwh->lpData; - sample_64 <= last_sample_64; + sample_64 < (__m64*)(pwh->lpData + pwh->dwBufferLength); ++sample_64) { //...multiply the samples by the volume... @@ -157,11 +162,10 @@ extern "C" // the captain has turned off the MMX sign, you are now free to use floating point registers _mm_empty(); - // finish remaining samples that didn't fit into 64 bit register for (short* sample_16 = (short*)sample_64; sample_16 < (short*)(pwh->lpData + pwh->dwBufferLength); ++sample_16) - { + { // finish remaining samples that didn't fit into 64 bit register *sample_16 = (*sample_16 * volume_16) >> 15; } |