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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*******************************************************************************
lqt_codecapi.h
libquicktime - A library for reading and writing quicktime/avi/mp4 files.
http://libquicktime.sourceforge.net
Copyright (C) 2002 Heroine Virtual Ltd.
Copyright (C) 2002-2011 Members of the libquicktime project.
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2.1 of the License, or (at your option)
any later version.
This library 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 Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*******************************************************************************/
#ifndef _LQT_CODECAPI_H_
#define _LQT_CODECAPI_H_
#pragma GCC visibility push(default)
#include <config.h>
#include <quicktime/lqt_version.h>
#include <quicktime/lqt.h>
#include <quicktime/qtprivate.h>
#include <quicktime/compression.h>
#ifdef HAVE_GCC_VISIBILITY
#define LQT_EXTERN __attribute__ ((visibility("default")))
#else
#define LQT_EXTERN extern
#endif
#define LQT_WAV_ID_NONE -1
/*
* Functions and datatypes for exclusive
* use by codec modules
*/
/*
* This defines the actual codec creation function,
* which should be returned by get_codec()
*/
typedef void (* lqt_init_codec_func_t)(quicktime_codec_t * codec,
quicktime_audio_map_t *,
quicktime_video_map_t *);
typedef struct
{
/* Parameter name (to be passed to quicktime_set_parameter() ) */
char * name;
char * real_name; /* Other name (for making dialogs) */
lqt_parameter_type_t type;
lqt_parameter_value_t val_default;
/*
* Minimum and maximum values:
* These are only valid for numeric types and if val_min < val_max
*/
lqt_parameter_value_t val_min;
lqt_parameter_value_t val_max;
int num_digits; /*!< Number of digits for floating point parameters */
/*
* Possible options (only valid for LQT_STRINGLIST)
* NULL terminated
*/
char ** stringlist_options;
char ** stringlist_labels;
char * help_string;
} lqt_parameter_info_static_t;
typedef struct
{
int width;
int height;
} lqt_image_size_static_t;
/*
* This holds the parts of the codec_info structure,
* which can be defined statically in the codec source
*/
typedef struct
{
int compatibility_flags;
char * name; /* Name of the codec */
char * long_name; /* Long name of the codec */
char * description; /* Description */
/* Fourccs, NULL terminated */
char ** fourccs;
/* WAV IDs, terminated with LQT_WAV_ID_NONE */
int * wav_ids;
lqt_codec_type type;
lqt_codec_direction direction;
lqt_parameter_info_static_t * encoding_parameters;
lqt_parameter_info_static_t * decoding_parameters;
char * gettext_domain; /*!< First argument to bindtextdomain(). Must be set only for externally packaged codecs */
char * gettext_directory; /*!< Second argument to bindtextdomain(). Must be set only for externally packaged codecs */
int * encoding_colormodels;
lqt_image_size_static_t * image_sizes;
lqt_compression_id_t compression_id;
} lqt_codec_info_static_t;
/*
* Return the codec api version. This function will be defined in every
* sourcefile, which includes it. This means, that each module must
* have exactly one sourcefile which includes it.
* This file will be the lqt_* interface file of the module.
*/
#ifndef LQT_LIBQUICKTIME
int get_codec_api_version(void);
int get_codec_api_version(void) { return LQT_CODEC_API_VERSION; }
/* Declarations for the codec functions */
LQT_EXTERN int get_num_codecs();
LQT_EXTERN lqt_codec_info_static_t * get_codec_info(int index);
LQT_EXTERN lqt_init_codec_func_t get_codec(int index);
#endif
/*
* Create a lqt_codec_info_t structure from statically defined data
*
* Typically, you will define the lqt_codec_info_static_t as well
* as arrays for the (en/de)coding parameters for each codec in the
* module.
*
* The get_codec_info() function in your module will then call the
codec->decode_buffer * function below to create a lqt_codec_info_t from the argument.
* All data are copied, so the returned structure can be used after
* closing the module.
*
*/
lqt_codec_info_t *
lqt_create_codec_info(const lqt_codec_info_static_t * template);
/* Some audio stuff */
int16_t ** lqt_audio_buffer_create_int16(int num_channels, int num_samples);
float ** lqt_audio_buffer_create_float(int num_channels, int num_samples);
/* An extremely useful function for audio decoders */
/*
* It copies the smaller one of src_size and dst_size
* from src_pos in the source to dst_pos in the destination
* either src_i or src_f can be NULL. Same for dst_i and
* dst_f. But here, you can also set individual channels to NULL.
*/
int lqt_copy_audio(int16_t ** dst_i, float ** dst_f,
int16_t ** src_i, float ** src_f,
int dst_pos, int src_pos,
int dst_size, int src_size, int num_channels);
/*
* Read one audio chunk
* buffer will be realloced if too small and buffer_alloc will be the
* new allocated size. Return value is the number of valid bytes,
* which might be smaller than buffer_alloc.
*/
int lqt_read_audio_chunk(quicktime_t * file, int track,
long chunk,
uint8_t ** buffer, int * buffer_alloc, int * samples);
int lqt_append_audio_chunk(quicktime_t * file, int track,
long chunk,
uint8_t ** buffer, int * buffer_alloc,
int initial_bytes);
/*
* Read VBR audio packets
*/
/* Check if VBR reading should be enabled */
int lqt_audio_is_vbr(quicktime_t * file, int track);
/* Determine the number of VBR packets (=samples) in one chunk */
LQT_EXTERN int lqt_audio_num_vbr_packets(quicktime_t * file, int track, long chunk, int * samples);
/* Read one VBR packet */
int lqt_audio_read_vbr_packet(quicktime_t * file,
int track, long chunk, int packet,
uint8_t ** buffer, int * buffer_alloc,
int * samples);
#pragma GCC visibility pop
#endif // _LQT_CODECAPI_H_
|
