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
|
/*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* common internal api header.
*/
#ifndef AVCODEC_INTERNAL_H
#define AVCODEC_INTERNAL_H
#include <stdint.h>
#include "libavutil/mathematics.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
typedef struct InternalBuffer {
uint8_t *base[AV_NUM_DATA_POINTERS];
uint8_t *data[AV_NUM_DATA_POINTERS];
int linesize[AV_NUM_DATA_POINTERS];
int width;
int height;
enum PixelFormat pix_fmt;
uint8_t **extended_data;
int audio_data_size;
int nb_channels;
} InternalBuffer;
typedef struct AVCodecInternal {
/**
* internal buffer count
* used by default get/release/reget_buffer().
*/
int buffer_count;
/**
* internal buffers
* used by default get/release/reget_buffer().
*/
InternalBuffer *buffer;
/**
* Whether the parent AVCodecContext is a copy of the context which had
* init() called on it.
* This is used by multithreading - shared tables and picture pointers
* should be freed from the original context only.
*/
int is_copy;
#if FF_API_OLD_DECODE_AUDIO
/**
* Internal sample count used by avcodec_encode_audio() to fabricate pts.
* Can be removed along with avcodec_encode_audio().
*/
int sample_count;
#endif
} AVCodecInternal;
struct AVCodecDefault {
const uint8_t *key;
const uint8_t *value;
};
/**
* Determine whether pix_fmt is a hardware accelerated format.
*/
int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt);
/**
* Return the hardware accelerated codec for codec codec_id and
* pixel format pix_fmt.
*
* @param codec_id the codec to match
* @param pix_fmt the pixel format to match
* @return the hardware accelerated codec, or NULL if none was found.
*/
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt);
/**
* Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
* If there is no such matching pair then size is returned.
*/
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
unsigned int avpriv_toupper4(unsigned int x);
/**
* does needed setup of pkt_pts/pos and such for (re)get_buffer();
*/
void ff_init_buffer_info(AVCodecContext *s, AVFrame *pic);
/**
* Remove and free all side data from packet.
*/
void ff_packet_free_side_data(AVPacket *pkt);
int avpriv_lock_avformat(void);
int avpriv_unlock_avformat(void);
/**
* Maximum size in bytes of extradata.
* This value was chosen such that every bit of the buffer is
* addressable by a 32-bit signed integer as used by get_bits.
*/
#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
/**
* Check AVPacket size and/or allocate data.
*
* Encoders supporting AVCodec.encode2() can use this as a convenience to
* ensure the output packet data is large enough, whether provided by the user
* or allocated in this function.
*
* @param avpkt the AVPacket
* If avpkt->data is already set, avpkt->size is checked
* to ensure it is large enough.
* If avpkt->data is NULL, a new buffer is allocated.
* avpkt->size is set to the specified size.
* All other AVPacket fields will be reset with av_init_packet().
* @param size the minimum required packet size
* @return 0 on success, negative error code on failure
*/
int ff_alloc_packet(AVPacket *avpkt, int size);
/**
* Rescale from sample rate to AVCodecContext.time_base.
*/
static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
int64_t samples)
{
return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
avctx->time_base);
}
#endif /* AVCODEC_INTERNAL_H */
|
