1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* Copyright (C) 2008 Max Kellermann <max@duempel.org>
* 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 DECODER_API_H
#define DECODER_API_H
/*
* This is the public API which is used by decoder plugins to
* communicate with the mpd core.
*
*/
#include "inputStream.h"
#include "replayGain.h"
#include "tag.h"
#include "playerData.h"
/* valid values for streamTypes in the InputPlugin struct: */
#define INPUT_PLUGIN_STREAM_FILE 0x01
#define INPUT_PLUGIN_STREAM_URL 0x02
struct decoder;
/* optional, set this to NULL if the InputPlugin doesn't have/need one
* this must return < 0 if there is an error and >= 0 otherwise */
typedef int (*decoder_init_func) (void);
/* optional, set this to NULL if the InputPlugin doesn't have/need one */
typedef void (*decoder_finish_func) (void);
/* boolean return value, returns 1 if the InputStream is decodable by
* the InputPlugin, 0 if not */
typedef unsigned int (*decoder_try_decode_func) (InputStream *);
/* this will be used to decode InputStreams, and is recommended for files
* and networked (HTTP) connections.
*
* returns -1 on error, 0 on success */
typedef int (*decoder_stream_decode_func) (struct decoder *, InputStream *);
/* use this if and only if your InputPlugin can only be passed a filename or
* handle as input, and will not allow callbacks to be set (like Ogg-Vorbis
* and FLAC libraries allow)
*
* returns -1 on error, 0 on success */
typedef int (*decoder_file_decode_func) (struct decoder *, char *path);
/* file should be the full path! Returns NULL if a tag cannot be found
* or read */
typedef MpdTag *(*decoder_tag_dup_func) (char *file);
struct decoder_plugin {
const char *name;
decoder_init_func initFunc;
decoder_finish_func finishFunc;
decoder_try_decode_func tryDecodeFunc;
decoder_stream_decode_func streamDecodeFunc;
decoder_file_decode_func fileDecodeFunc;
decoder_tag_dup_func tagDupFunc;
/* one or more of the INPUT_PLUGIN_STREAM_* values OR'd together */
unsigned char streamTypes;
/* last element in these arrays must always be a NULL: */
const char *const*suffixes;
const char *const*mimeTypes;
};
/**
* Opaque handle which the decoder plugin passes to the functions in
* this header.
*/
struct decoder;
/**
* Notify the player thread that it has finished initialization and
* that it has read the song's meta data.
*/
void decoder_initialized(struct decoder * decoder,
const AudioFormat * audio_format,
float total_time);
const char *decoder_get_url(struct decoder * decoder, char * buffer);
enum decoder_command decoder_get_command(struct decoder * decoder);
/**
* Called by the decoder when it has performed the requested command
* (dc->command). This function resets dc->command and wakes up the
* player thread.
*/
void decoder_command_finished(struct decoder * decoder);
double decoder_seek_where(struct decoder * decoder);
void decoder_seek_error(struct decoder * decoder);
/**
* This function is called by the decoder plugin when it has
* successfully decoded block of input data.
*
* We send inStream for buffering the inputStream while waiting to
* send the next chunk
*/
enum decoder_command
decoder_data(struct decoder *decoder, InputStream * inStream, int seekable,
void *data, size_t datalen, float data_time, mpd_uint16 bitRate,
ReplayGainInfo * replayGainInfo);
void decoder_flush(struct decoder *decoder);
void decoder_clear(struct decoder *decoder);
#endif
|
