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/*
* Copyright 2008-2013 Various Authors
* Copyright 2004 Timo Hirvonen
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef CMUS_NOMAD_H
#define CMUS_NOMAD_H
#include <sys/types.h>
#ifndef __GNUC__
#include <unistd.h>
#endif
/* default callbacks use read, lseek, close */
struct nomad_callbacks {
ssize_t (*read)(void *datasource, void *buffer, size_t count);
off_t (*lseek)(void *datasource, off_t offset, int whence);
int (*close)(void *datasource);
};
enum {
XING_FRAMES = 0x00000001L,
XING_BYTES = 0x00000002L,
XING_TOC = 0x00000004L,
XING_SCALE = 0x00000008L
};
struct nomad_xing {
unsigned int is_info : 1;
unsigned int flags;
unsigned int nr_frames;
unsigned int bytes;
unsigned int scale;
unsigned char toc[100];
};
struct nomad_lame {
char encoder[10]; /* 9 byte encoder name/version ("LAME3.97b") */
int vbr_method; /* VBR method */
float peak; /* replaygain peak */
float trackGain; /* replaygain track gain */
float albumGain; /* replaygain album gain */
int encoderDelay; /* # of added samples at start of mp3 */
int encoderPadding; /* # of added samples at end of mp3 */
};
/* always 16-bit signed little-endian */
struct nomad_info {
double duration;
int sample_rate;
int channels;
int nr_frames;
int layer;
/* guessed */
int vbr;
/* guessed */
int avg_bitrate;
/* -1 if file not seekable */
off_t filesize;
unsigned int joint_stereo : 1;
unsigned int dual_channel : 1;
};
enum {
NOMAD_ERROR_SUCCESS,
NOMAD_ERROR_ERRNO,
NOMAD_ERROR_FILE_FORMAT
};
struct nomad;
/* -NOMAD_ERROR_ERRNO -NOMAD_ERROR_FILE_FORMAT */
int nomad_open_callbacks(struct nomad **nomadp, void *datasource,
struct nomad_callbacks *cbs);
void nomad_close(struct nomad *nomad);
/* -NOMAD_ERROR_ERRNO */
int nomad_read(struct nomad *nomad, char *buffer, int count);
/* -NOMAD_ERROR_ERRNO */
int nomad_time_seek(struct nomad *nomad, double pos);
const struct nomad_xing *nomad_xing(struct nomad *nomad);
const struct nomad_lame *nomad_lame(struct nomad *nomad);
const struct nomad_info *nomad_info(struct nomad *nomad);
long nomad_current_bitrate(struct nomad *nomad);
#endif
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