89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
/************************************************************************
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* Copyright (c) 2005-2007 tok@openlinux.org.uk *
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* *
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* This software is provided as-is, without any express or implied *
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* warranty. In no event will the authors be held liable for any *
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* damages arising from the use of this software. *
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* *
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* Permission is granted to anyone to use this software for any purpose, *
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* including commercial applications, and to alter it and redistribute *
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* it freely, subject to the following restrictions: *
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* *
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* 1. The origin of this software must not be misrepresented; you must *
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* not claim that you wrote the original software. If you use this *
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* software in a product, an acknowledgment in the product documentation *
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* would be appreciated but is not required. *
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* *
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* 2. Altered source versions must be plainly marked as such, and must *
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* not be misrepresented as being the original software. *
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* *
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* 3. This notice may not be removed or altered from any source *
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* distribution. *
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************************************************************************/
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#ifdef WITH_SOUND
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#include <string>
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#include "m_exceptions.h"
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#include "sound_music_player.h"
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namespace Audio {
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bool MusicPlayerCtrl::isPlaying = false;
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Sound_Sample * MusicPlayerCtrl::music = 0;
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MusicFinishedCallbackType MusicPlayerCtrl::musicFinishedCB;
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void MusicPlayerCtrl::clear() {
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if (MusicPlayerCtrl::isPlaying)
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MusicPlayerCtrl::isPlaying = false;
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if (MusicPlayerCtrl::music) {
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Sound_FreeSample(MusicPlayerCtrl::music);
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MusicPlayerCtrl::music = 0;
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}
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if (MusicPlayerCtrl::musicFinishedCB)
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MusicPlayerCtrl::musicFinishedCB();
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}
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// taken from an example on the web, can't remember where...
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// slightly simplified: removed looping
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void musicPlayerFunc(void *udata, Uint8 *stream, int len) {
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int i,act=0;
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Sint16 *ptr2;
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if (stream == 0)
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throw E_INVALIDFORMAT("Encountered a zero music stream while playing :-(");
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ptr2=(Sint16 *)stream;
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if (MusicPlayerCtrl::isPlaying) {
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while (act < len) {
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if (MusicPlayerCtrl::music != 0) {
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if ((MusicPlayerCtrl::music->flags&SOUND_SAMPLEFLAG_EOF)) {
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MusicPlayerCtrl::clear();
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}
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else {
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/* In the middle of the file: */
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int decoded=0;
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Sint16 *ptr;
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Sound_SetBufferSize(MusicPlayerCtrl::music, len-act);
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decoded=Sound_Decode(MusicPlayerCtrl::music);
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ptr=(Sint16 *)MusicPlayerCtrl::music->buffer;
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for(i=0;i<decoded;i+=2,ptr++,ptr2++) {
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*ptr2=((Sint32(*ptr)*Sint32(music_volume))/127);
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} /* for */
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act+=decoded;
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}
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}
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else {
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for(i=act;i<len;i++) stream[i]=0;
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act=len;
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}
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}
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}
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else { // not playing; fill with zero
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for(i=0;i<len;i++) stream[i]=0;
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}
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}
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}
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#endif
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