Remove pointless #undefs of previously forbidden functions.
[libav.git] / libavcodec / internal.h
CommitLineData
dbbec0c2 1/*
2912e87a 2 * This file is part of Libav.
dbbec0c2 3 *
2912e87a 4 * Libav is free software; you can redistribute it and/or
dbbec0c2
SS
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
2912e87a 9 * Libav is distributed in the hope that it will be useful,
dbbec0c2
SS
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
2912e87a 15 * License along with Libav; if not, write to the Free Software
dbbec0c2
SS
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19/**
ba87f080 20 * @file
dbbec0c2
SS
21 * common internal api header.
22 */
23
24#ifndef AVCODEC_INTERNAL_H
25#define AVCODEC_INTERNAL_H
26
a05aa821 27#include <stdint.h>
f3a29b75 28
91a28b0e 29#include "libavutil/mathematics.h"
f3a29b75 30#include "libavutil/pixfmt.h"
a05aa821
MN
31#include "avcodec.h"
32
bb6941af
JR
33#define FF_SANE_NB_CHANNELS 128U
34
f3a29b75 35typedef struct InternalBuffer {
0eea2129
JR
36 uint8_t *base[AV_NUM_DATA_POINTERS];
37 uint8_t *data[AV_NUM_DATA_POINTERS];
38 int linesize[AV_NUM_DATA_POINTERS];
f3a29b75
JR
39 int width;
40 int height;
716d413c 41 enum AVPixelFormat pix_fmt;
0eea2129
JR
42 uint8_t **extended_data;
43 int audio_data_size;
44 int nb_channels;
f3a29b75
JR
45} InternalBuffer;
46
47typedef struct AVCodecInternal {
48 /**
49 * internal buffer count
50 * used by default get/release/reget_buffer().
51 */
52 int buffer_count;
53
54 /**
55 * internal buffers
56 * used by default get/release/reget_buffer().
57 */
58 InternalBuffer *buffer;
59
60 /**
61 * Whether the parent AVCodecContext is a copy of the context which had
62 * init() called on it.
63 * This is used by multithreading - shared tables and picture pointers
64 * should be freed from the original context only.
65 */
66 int is_copy;
b2c75b6e
JR
67
68#if FF_API_OLD_DECODE_AUDIO
69 /**
70 * Internal sample count used by avcodec_encode_audio() to fabricate pts.
71 * Can be removed along with avcodec_encode_audio().
72 */
73 int sample_count;
74#endif
a5117a24
AK
75
76 /**
77 * An audio frame with less than required samples has been submitted and
78 * padded with silence. Reject all subsequent frames.
79 */
80 int last_audio_frame;
f3a29b75
JR
81} AVCodecInternal;
82
84626b36
AK
83struct AVCodecDefault {
84 const uint8_t *key;
85 const uint8_t *value;
86};
87
dbbec0c2 88/**
49bd8e4b 89 * Return the hardware accelerated codec for codec codec_id and
bf7e799c 90 * pixel format pix_fmt.
a05aa821
MN
91 *
92 * @param codec_id the codec to match
93 * @param pix_fmt the pixel format to match
94 * @return the hardware accelerated codec, or NULL if none was found.
95 */
716d413c 96AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt);
a05aa821 97
9e2e8214
MN
98/**
99 * Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
100 * If there is no such matching pair then size is returned.
101 */
6c060b55
MN
102int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
103
0842d589 104unsigned int avpriv_toupper4(unsigned int x);
603a5f04 105
2d1b6fb7
MS
106int avpriv_lock_avformat(void);
107int avpriv_unlock_avformat(void);
108
4df30f71
AC
109/**
110 * Maximum size in bytes of extradata.
111 * This value was chosen such that every bit of the buffer is
112 * addressable by a 32-bit signed integer as used by get_bits.
113 */
114#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
115
b2c75b6e
JR
116/**
117 * Check AVPacket size and/or allocate data.
118 *
119 * Encoders supporting AVCodec.encode2() can use this as a convenience to
120 * ensure the output packet data is large enough, whether provided by the user
121 * or allocated in this function.
122 *
123 * @param avpkt the AVPacket
124 * If avpkt->data is already set, avpkt->size is checked
125 * to ensure it is large enough.
126 * If avpkt->data is NULL, a new buffer is allocated.
1a670973 127 * avpkt->size is set to the specified size.
b2c75b6e
JR
128 * All other AVPacket fields will be reset with av_init_packet().
129 * @param size the minimum required packet size
130 * @return 0 on success, negative error code on failure
131 */
132int ff_alloc_packet(AVPacket *avpkt, int size);
133
91a28b0e
JR
134/**
135 * Rescale from sample rate to AVCodecContext.time_base.
136 */
137static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
138 int64_t samples)
139{
140 return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
141 avctx->time_base);
142}
143
dbbec0c2 144#endif /* AVCODEC_INTERNAL_H */