20c4638a2e
First patch without camelCase ;) output_buffer_skip() lets us eliminate advanceOutputBufferTo(), and removes yet another external OutputBuffer struct access. git-svn-id: https://svn.musicpd.org/mpd/trunk@7312 09075e82-0dd4-0310-85a5-a0d7c8717e4f
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/* 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 OUTPUT_BUFFER_H
|
|
#define OUTPUT_BUFFER_H
|
|
|
|
#include "pcm_utils.h"
|
|
#include "mpd_types.h"
|
|
#include "decode.h"
|
|
#include "audio.h"
|
|
#include "inputStream.h"
|
|
#include "replayGain.h"
|
|
|
|
#define OUTPUT_BUFFER_DC_STOP -1
|
|
#define OUTPUT_BUFFER_DC_SEEK -2
|
|
|
|
/* pick 1020 since its devisible for 8,16,24, and 32-bit audio */
|
|
#define CHUNK_SIZE 1020
|
|
|
|
typedef struct _OutputBufferChunk {
|
|
volatile mpd_uint16 chunkSize;
|
|
volatile mpd_uint16 bitRate;
|
|
volatile float times;
|
|
char data[CHUNK_SIZE];
|
|
} OutputBufferChunk;
|
|
|
|
/**
|
|
* A ring set of buffers where the decoder appends data after the end,
|
|
* and the player consumes data from the beginning.
|
|
*/
|
|
typedef struct _OutputBuffer {
|
|
OutputBufferChunk *chunks;
|
|
|
|
unsigned int size;
|
|
|
|
/** the index of the first decoded chunk */
|
|
mpd_uint16 volatile begin;
|
|
|
|
/** the index after the last decoded chunk */
|
|
mpd_uint16 volatile end;
|
|
|
|
mpd_sint16 currentChunk;
|
|
|
|
AudioFormat audioFormat;
|
|
ConvState convState;
|
|
} OutputBuffer;
|
|
|
|
void initOutputBuffer(OutputBuffer * cb, unsigned int size);
|
|
|
|
void clearOutputBuffer(OutputBuffer * cb);
|
|
|
|
void flushOutputBuffer(OutputBuffer * cb);
|
|
|
|
/** is the buffer empty? */
|
|
int outputBufferEmpty(const OutputBuffer * cb);
|
|
|
|
void outputBufferShift(OutputBuffer * cb);
|
|
|
|
/**
|
|
* what is the position of the specified chunk number, relative to
|
|
* the first chunk in use?
|
|
*/
|
|
unsigned int outputBufferRelative(const OutputBuffer * cb, unsigned i);
|
|
|
|
/** determine the number of decoded chunks */
|
|
unsigned availableOutputBuffer(const OutputBuffer * cb);
|
|
|
|
/**
|
|
* Get the absolute index of the nth used chunk after the first one.
|
|
* Returns -1 if there is no such chunk.
|
|
*/
|
|
int outputBufferAbsolute(const OutputBuffer * cb, unsigned relative);
|
|
|
|
OutputBufferChunk * outputBufferGetChunk(const OutputBuffer * cb, unsigned i);
|
|
|
|
/* we send inStream for buffering the inputStream while waiting to
|
|
send the next chunk */
|
|
int sendDataToOutputBuffer(OutputBuffer * cb,
|
|
InputStream * inStream,
|
|
DecoderControl * dc,
|
|
int seekable,
|
|
void *data,
|
|
size_t datalen,
|
|
float data_time,
|
|
mpd_uint16 bitRate, ReplayGainInfo * replayGainInfo);
|
|
|
|
void output_buffer_skip(OutputBuffer * cb, unsigned num);
|
|
|
|
#endif
|