58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: http://www.musicpd.org
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*
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* This program 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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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PCM_UTILS_H
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#define PCM_UTILS_H
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#include "../config.h"
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#include "audio.h"
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#include "os_compat.h"
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#ifdef HAVE_LIBSAMPLERATE
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#include <samplerate.h>
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#endif
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typedef struct _ConvState {
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#ifdef HAVE_LIBSAMPLERATE
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SRC_STATE *state;
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SRC_DATA data;
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size_t dataInSize;
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size_t dataOutSize;
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mpd_sint8 lastChannels;
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mpd_uint32 lastInSampleRate;
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mpd_uint32 lastOutSampleRate;
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#endif
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/* Strict C99 doesn't allow empty structs */
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int error;
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} ConvState;
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void pcm_volumeChange(char *buffer, int bufferSize, AudioFormat * format,
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int volume);
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void pcm_mix(char *buffer1, const char *buffer2, size_t bufferSize1,
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size_t bufferSize2, const AudioFormat * format, float portion1);
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size_t pcm_convertAudioFormat(AudioFormat * inFormat, const char *inBuffer,
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size_t inSize, AudioFormat * outFormat,
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char *outBuffer, ConvState *convState);
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size_t pcm_sizeOfConvBuffer(const AudioFormat * inFormat, size_t inSize,
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const AudioFormat * outFormat);
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#endif
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