/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * This project's homepage is: http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef PCM_UTILS_H #define PCM_UTILS_H #include "../config.h" #include "audio_format.h" #include "os_compat.h" #ifdef HAVE_LIBSAMPLERATE #include <samplerate.h> #endif typedef struct _ConvState { #ifdef HAVE_LIBSAMPLERATE SRC_STATE *state; SRC_DATA data; size_t dataInSize; size_t dataOutSize; mpd_sint8 lastChannels; mpd_uint32 lastInSampleRate; mpd_uint32 lastOutSampleRate; #endif /* Strict C99 doesn't allow empty structs */ int error; } ConvState; void pcm_volumeChange(char *buffer, int bufferSize, const AudioFormat * format, int volume); void pcm_mix(char *buffer1, const char *buffer2, size_t bufferSize1, size_t bufferSize2, const AudioFormat * format, float portion1); size_t pcm_convertAudioFormat(const AudioFormat * inFormat, const char *inBuffer, size_t inSize, const AudioFormat * outFormat, char *outBuffer, ConvState *convState); size_t pcm_sizeOfConvBuffer(const AudioFormat * inFormat, size_t inSize, const AudioFormat * outFormat); #endif