104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* Copyright 2008-2013 Various Authors
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* Copyright 2004 Timo Hirvonen
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CMUS_NOMAD_H
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#define CMUS_NOMAD_H
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#include <sys/types.h>
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#ifndef __GNUC__
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#include <unistd.h>
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#endif
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/* default callbacks use read, lseek, close */
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struct nomad_callbacks {
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ssize_t (*read)(void *datasource, void *buffer, size_t count);
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off_t (*lseek)(void *datasource, off_t offset, int whence);
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int (*close)(void *datasource);
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};
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enum {
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XING_FRAMES = 0x00000001L,
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XING_BYTES = 0x00000002L,
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XING_TOC = 0x00000004L,
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XING_SCALE = 0x00000008L
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};
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struct nomad_xing {
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unsigned int is_info : 1;
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unsigned int flags;
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unsigned int nr_frames;
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unsigned int bytes;
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unsigned int scale;
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unsigned char toc[100];
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};
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struct nomad_lame {
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char encoder[10]; /* 9 byte encoder name/version ("LAME3.97b") */
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int vbr_method; /* VBR method */
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float peak; /* replaygain peak */
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float trackGain; /* replaygain track gain */
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float albumGain; /* replaygain album gain */
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int encoderDelay; /* # of added samples at start of mp3 */
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int encoderPadding; /* # of added samples at end of mp3 */
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};
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/* always 16-bit signed little-endian */
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struct nomad_info {
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double duration;
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int sample_rate;
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int channels;
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int nr_frames;
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int layer;
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/* guessed */
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int vbr;
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/* guessed */
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int avg_bitrate;
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/* -1 if file not seekable */
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off_t filesize;
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unsigned int joint_stereo : 1;
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unsigned int dual_channel : 1;
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};
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enum {
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NOMAD_ERROR_SUCCESS,
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NOMAD_ERROR_ERRNO,
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NOMAD_ERROR_FILE_FORMAT
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};
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struct nomad;
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/* -NOMAD_ERROR_ERRNO -NOMAD_ERROR_FILE_FORMAT */
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int nomad_open_callbacks(struct nomad **nomadp, void *datasource,
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struct nomad_callbacks *cbs);
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void nomad_close(struct nomad *nomad);
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/* -NOMAD_ERROR_ERRNO */
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int nomad_read(struct nomad *nomad, char *buffer, int count);
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/* -NOMAD_ERROR_ERRNO */
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int nomad_time_seek(struct nomad *nomad, double pos);
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const struct nomad_xing *nomad_xing(struct nomad *nomad);
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const struct nomad_lame *nomad_lame(struct nomad *nomad);
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const struct nomad_info *nomad_info(struct nomad *nomad);
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long nomad_current_bitrate(struct nomad *nomad);
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#endif
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