Mercurial > almixer_isolated
diff Isolated/LGPL/SDL_sound_minimal.c @ 38:71b465ff0622
Added support files.
author | Eric Wing <ewing@anscamobile.com> |
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date | Thu, 28 Apr 2011 16:22:30 -0700 |
parents | |
children | 96c61ac12446 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Isolated/LGPL/SDL_sound_minimal.c Thu Apr 28 16:22:30 2011 -0700 @@ -0,0 +1,41 @@ +/* + * SDL_sound -- An abstract sound format decoding API. + * Copyright (C) 2001 Ryan C. Gordon. + * + * 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * 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. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + Attention: This is a stripped down file of SDL_endian for our purposes. + This code is licensed under the LGPL. + This means we must not compile this code into anything that we are not willing to + publicly release source code. + You should compile this into a separate dynamic library that is isolated from proprietary code. + */ + + +#include <stdint.h> +#include "SoundDecoder.h" + +uint32_t __Sound_convertMsToBytePos(Sound_AudioInfo *info, uint32_t ms) +{ + /* "frames" == "sample frames" */ + float frames_per_ms = ((float) info->rate) / 1000.0f; + uint32_t frame_offset = (uint32_t) (frames_per_ms * ((float) ms)); + uint32_t frame_size = (uint32_t) ((info->format & 0xFF) / 8) * info->channels; + return(frame_offset * frame_size); +} /* __Sound_convertMsToBytePos */ + +