mpegvideo_enc: drop support for reusing the input motion vectors.
[libav.git] / libavcodec / internal.h
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dbbec0c2 1/*
2912e87a 2 * This file is part of Libav.
dbbec0c2 3 *
2912e87a 4 * Libav is free software; you can redistribute it and/or
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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,
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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
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16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19/**
ba87f080 20 * @file
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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"
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31#include "avcodec.h"
32
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33#define FF_SANE_NB_CHANNELS 128U
34
f3a29b75 35typedef struct InternalBuffer {
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36 uint8_t *base[AV_NUM_DATA_POINTERS];
37 uint8_t *data[AV_NUM_DATA_POINTERS];
38 int linesize[AV_NUM_DATA_POINTERS];
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39 int width;
40 int height;
716d413c 41 enum AVPixelFormat pix_fmt;
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42} InternalBuffer;
43
44typedef struct AVCodecInternal {
45 /**
46 * internal buffer count
47 * used by default get/release/reget_buffer().
48 */
49 int buffer_count;
50
51 /**
52 * internal buffers
53 * used by default get/release/reget_buffer().
54 */
55 InternalBuffer *buffer;
56
57 /**
58 * Whether the parent AVCodecContext is a copy of the context which had
59 * init() called on it.
60 * This is used by multithreading - shared tables and picture pointers
61 * should be freed from the original context only.
62 */
63 int is_copy;
b2c75b6e 64
5a4e9fe8 65#if FF_API_OLD_ENCODE_AUDIO
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66 /**
67 * Internal sample count used by avcodec_encode_audio() to fabricate pts.
68 * Can be removed along with avcodec_encode_audio().
69 */
70 int sample_count;
71#endif
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72
73 /**
74 * An audio frame with less than required samples has been submitted and
75 * padded with silence. Reject all subsequent frames.
76 */
77 int last_audio_frame;
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78
79 /**
80 * The data for the last allocated audio frame.
81 * Stored here so we can free it.
82 */
83 uint8_t *audio_data;
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84} AVCodecInternal;
85
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86struct AVCodecDefault {
87 const uint8_t *key;
88 const uint8_t *value;
89};
90
dbbec0c2 91/**
49bd8e4b 92 * Return the hardware accelerated codec for codec codec_id and
bf7e799c 93 * pixel format pix_fmt.
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94 *
95 * @param codec_id the codec to match
96 * @param pix_fmt the pixel format to match
97 * @return the hardware accelerated codec, or NULL if none was found.
98 */
716d413c 99AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt);
a05aa821 100
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101/**
102 * Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
103 * If there is no such matching pair then size is returned.
104 */
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105int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
106
0842d589 107unsigned int avpriv_toupper4(unsigned int x);
603a5f04 108
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109int avpriv_lock_avformat(void);
110int avpriv_unlock_avformat(void);
111
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112/**
113 * Maximum size in bytes of extradata.
114 * This value was chosen such that every bit of the buffer is
115 * addressable by a 32-bit signed integer as used by get_bits.
116 */
117#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
118
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119/**
120 * Check AVPacket size and/or allocate data.
121 *
122 * Encoders supporting AVCodec.encode2() can use this as a convenience to
123 * ensure the output packet data is large enough, whether provided by the user
124 * or allocated in this function.
125 *
126 * @param avpkt the AVPacket
127 * If avpkt->data is already set, avpkt->size is checked
128 * to ensure it is large enough.
129 * If avpkt->data is NULL, a new buffer is allocated.
1a670973 130 * avpkt->size is set to the specified size.
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131 * All other AVPacket fields will be reset with av_init_packet().
132 * @param size the minimum required packet size
133 * @return 0 on success, negative error code on failure
134 */
135int ff_alloc_packet(AVPacket *avpkt, int size);
136
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137/**
138 * Rescale from sample rate to AVCodecContext.time_base.
139 */
140static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
141 int64_t samples)
142{
143 return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
144 avctx->time_base);
145}
146
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147/**
148 * Get a buffer for a frame. This is a wrapper around
149 * AVCodecContext.get_buffer() and should be used instead calling get_buffer()
150 * directly.
151 */
152int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame);
153
dbbec0c2 154#endif /* AVCODEC_INTERNAL_H */