394 lines
7.9 KiB
C
394 lines
7.9 KiB
C
/*
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This file is part of Warzone 2100.
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Copyright (C) 1999-2004 Eidos Interactive
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Copyright (C) 2005-2007 Warzone Resurrection Project
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Warzone 2100 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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Warzone 2100 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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You should have received a copy of the GNU General Public License
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along with Warzone 2100; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include <physfs.h>
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#include "lib/framework/frame.h"
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#ifndef WZ_NOSOUND
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# ifdef WZ_OS_MAC
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# include <OpenAL/al.h>
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# else
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# include <AL/al.h>
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# endif
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#endif
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#include "audio.h"
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#include "cdaudio.h"
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#include "mixer.h"
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#include "playlist.h"
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#include "oggvorbis.h"
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extern BOOL openal_initialized;
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#define NB_BUFFERS 16
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static const size_t bufferSize = 16 * 1024;
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static BOOL music_initialized;
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static PHYSFS_file* music_file = NULL;
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enum { WZ_NONE,
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WZ_OGG } music_file_format;
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static unsigned int music_track = 0;
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#ifndef WZ_NOSOUND
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static ALfloat music_volume = 0.5;
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#endif
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#ifndef WZ_NOSOUND
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static ALuint music_buffers[NB_BUFFERS];
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static ALuint music_source;
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#endif
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struct OggVorbisDecoderState* decoder = NULL;
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static inline unsigned int numProcessedBuffers(void)
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{
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#ifndef WZ_NOSOUND
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int count;
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alGetSourcei(music_source, AL_BUFFERS_PROCESSED, &count);
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return count;
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#else
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return 0;
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#endif
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}
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static inline unsigned int numQueuedBuffers(void)
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{
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#ifndef WZ_NOSOUND
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int count;
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alGetSourcei(music_source, AL_BUFFERS_QUEUED, &count);
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return count;
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#else
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return 0;
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#endif
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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BOOL cdAudio_Open( const char* user_musicdir )
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{
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if (!openal_initialized) {
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return FALSE;
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}
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#ifndef WZ_NOSOUND
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alGenBuffers(NB_BUFFERS, music_buffers);
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alGenSources(1, &music_source);
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alSourcef (music_source, AL_GAIN, music_volume);
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alSource3f(music_source, AL_POSITION, 0.0, 0.0, 0.0);
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alSource3f(music_source, AL_VELOCITY, 0.0, 0.0, 0.0);
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alSourcef (music_source, AL_ROLLOFF_FACTOR, 0.0);
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alSourcei (music_source, AL_SOURCE_RELATIVE, AL_TRUE);
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#endif
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PlayList_Init();
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if ((user_musicdir == NULL
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|| !PlayList_Read(user_musicdir))
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&& !PlayList_Read("music"))
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{
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return FALSE;
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}
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music_initialized = TRUE;
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return TRUE;
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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BOOL cdAudio_Close( void )
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{
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#ifndef WZ_NOSOUND
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alDeleteBuffers(NB_BUFFERS, music_buffers);
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alDeleteSources(1, &music_source);
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#endif
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PlayList_Quit();
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return TRUE;
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}
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static BOOL cdAudio_OpenTrack(const char* filename) {
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if (!music_initialized) {
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return FALSE;
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}
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if (music_file != NULL) {
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PHYSFS_close(music_file);
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}
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music_file_format = WZ_NONE;
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#ifndef WZ_NOSOUND
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if (strncasecmp(filename+strlen(filename)-4, ".ogg", 4) == 0)
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{
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music_file = PHYSFS_openRead(filename);
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if (music_file == NULL) {
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debug( LOG_SOUND, "Failed opening %s: %s\n", filename, PHYSFS_getLastError() );
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return FALSE;
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}
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decoder = sound_CreateOggVorbisDecoder(music_file, FALSE);
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if (decoder == NULL)
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{
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debug(LOG_ERROR, "cdAudio_OpenTrack: Failed to construct a decoder object\n");
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PHYSFS_close(music_file);
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music_file = NULL;
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return FALSE;
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}
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music_file_format = WZ_OGG;
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return TRUE;
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}
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#endif
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return FALSE; // unhandled
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}
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static BOOL cdAudio_CloseTrack(void) {
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if (music_track != 0)
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{
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#ifndef WZ_NOSOUND
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unsigned int bufferCount;
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alSourceStop(music_source);
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for(bufferCount = numQueuedBuffers() + numProcessedBuffers(); bufferCount != 0; --bufferCount)
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{
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ALuint buffer;
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alSourceUnqueueBuffers(music_source, 1, &buffer);
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alDeleteBuffers(1, &buffer);
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}
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#endif
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sound_DestroyOggVorbisDecoder(decoder);
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decoder = NULL;
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PHYSFS_close(music_file);
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music_file = NULL;
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music_track = 0;
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}
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return TRUE;
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}
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#ifndef WZ_NOSOUND
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static BOOL cdAudio_FillBuffer(ALuint buffer)
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{
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ALenum format;
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soundDataBuffer* pcm;
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if (decoder == NULL)
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{
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return FALSE;
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}
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pcm = sound_DecodeOggVorbis(decoder, bufferSize);
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if (pcm == NULL)
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{
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return FALSE;
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}
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if (pcm->size < bufferSize)
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{
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const char* filename = PlayList_NextSong();
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cdAudio_CloseTrack();
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if (filename == NULL)
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{
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music_track = 0;
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}
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if (cdAudio_OpenTrack(filename))
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{
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debug( LOG_SOUND, "Now playing %s\n", filename );
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}
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}
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if (pcm->size == 0)
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{
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free(pcm);
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return FALSE;
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}
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// Determine PCM data format
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format = (pcm->channelCount == 1) ? AL_FORMAT_MONO16 : AL_FORMAT_STEREO16;
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// fill the OpenAL buffer with the decoded data
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alBufferData(buffer, format, pcm->data, pcm->size, pcm->frequency);
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free(pcm);
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return TRUE;
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}
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#endif
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//*
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// ======================================================================
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// ======================================================================
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//
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BOOL cdAudio_PlayTrack( SDWORD iTrack )
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{
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#ifndef WZ_NOSOUND
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unsigned int i;
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#endif
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cdAudio_CloseTrack();
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PlayList_SetTrack(iTrack);
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{
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const char* filename = PlayList_CurrentSong();
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for (;;) {
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if (filename == NULL) {
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music_track = 0;
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return FALSE;
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}
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if (cdAudio_OpenTrack(filename)) {
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music_track = iTrack;
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break;
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} else {
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return FALSE; // break out to avoid infinite loops
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}
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filename = PlayList_NextSong();
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}
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}
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#ifndef WZ_NOSOUND
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for (i = 0; i < NB_BUFFERS; ++i) {
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if (!cdAudio_FillBuffer(music_buffers[i])) {
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return FALSE;
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}
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}
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alSourceQueueBuffers(music_source, NB_BUFFERS, music_buffers);
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alSourcePlay(music_source);
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#endif
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return TRUE;
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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BOOL cdAudio_Stop( void )
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{
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cdAudio_CloseTrack();
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return TRUE;
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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BOOL cdAudio_Pause( void )
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{
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return TRUE;
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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BOOL cdAudio_Resume( void )
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{
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return TRUE;
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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void cdAudio_Update( void )
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{
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#ifndef WZ_NOSOUND
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if (music_track != 0 && music_volume != 0.0)
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{
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unsigned int update;
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for (update = numProcessedBuffers(); update != 0; --update)
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{
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ALuint buffer;
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alSourceUnqueueBuffers(music_source, 1, &buffer);
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cdAudio_FillBuffer(buffer);
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alSourceQueueBuffers(music_source, 1, &buffer);
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}
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{
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ALenum state;
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alGetSourcei(music_source, AL_SOURCE_STATE, &state);
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if (state != AL_PLAYING) {
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alSourcePlay(music_source);
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}
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}
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}
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#endif
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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float sound_GetMusicVolume()
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{
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#ifndef WZ_NOSOUND
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return music_volume;
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#else
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return 0;
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#endif
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}
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//*
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// ======================================================================
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// ======================================================================
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//
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void sound_SetMusicVolume(float volume)
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{
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#ifndef WZ_NOSOUND
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music_volume = volume;
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// Keep volume in the range of 0.0 - 1.0
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if (music_volume < 0.0)
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{
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music_volume = 0.0;
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}
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else if (music_volume > 1.0)
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{
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music_volume = 1.0;
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}
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// Set the volume on the OpenAL source playing our music stream
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alSourcef(music_source, AL_GAIN, music_volume);
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#endif
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}
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