FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/internal.h
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 3 8 37.5%
Functions: 1 1 100.0%
Branches: 2 8 25.0%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
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 *
9 * FFmpeg is distributed in the hope that it will be useful,
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
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /**
20 * @file
21 * common internal api header.
22 */
23
24 #ifndef AVCODEC_INTERNAL_H
25 #define AVCODEC_INTERNAL_H
26
27 #include <stdint.h>
28
29 #include "libavutil/buffer.h"
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/pixfmt.h"
33 #include "avcodec.h"
34 #include "config.h"
35
36 #if CONFIG_LCMS2
37 # include "fflcms2.h"
38 #endif
39
40 #define FF_SANE_NB_CHANNELS 512U
41
42 #if HAVE_SIMD_ALIGN_64
43 # define STRIDE_ALIGN 64 /* AVX-512 */
44 #elif HAVE_SIMD_ALIGN_32
45 # define STRIDE_ALIGN 32
46 #elif HAVE_SIMD_ALIGN_16
47 # define STRIDE_ALIGN 16
48 #else
49 # define STRIDE_ALIGN 8
50 #endif
51
52 typedef struct AVCodecInternal {
53 /**
54 * When using frame-threaded decoding, this field is set for the first
55 * worker thread (e.g. to decode extradata just once).
56 */
57 int is_copy;
58
59 /**
60 * Audio encoders can set this flag during init to indicate that they
61 * want the small last frame to be padded to a multiple of pad_samples.
62 */
63 int pad_samples;
64
65 struct FramePool *pool;
66
67 void *thread_ctx;
68
69 /**
70 * This packet is used to hold the packet given to decoders
71 * implementing the .decode API; it is unused by the generic
72 * code for decoders implementing the .receive_frame API and
73 * may be freely used (but not freed) by them with the caveat
74 * that the packet will be unreferenced generically in
75 * avcodec_flush_buffers().
76 */
77 AVPacket *in_pkt;
78 struct AVBSFContext *bsf;
79
80 /**
81 * Properties (timestamps+side data) extracted from the last packet passed
82 * for decoding.
83 */
84 AVPacket *last_pkt_props;
85
86 /**
87 * temporary buffer used for encoders to store their bitstream
88 */
89 uint8_t *byte_buffer;
90 unsigned int byte_buffer_size;
91
92 void *frame_thread_encoder;
93
94 /**
95 * The input frame is stored here for encoders implementing the simple
96 * encode API.
97 *
98 * Not allocated in other cases.
99 */
100 AVFrame *in_frame;
101
102 /**
103 * When the AV_CODEC_FLAG_RECON_FRAME flag is used. the encoder should store
104 * here the reconstructed frame corresponding to the last returned packet.
105 *
106 * Not allocated in other cases.
107 */
108 AVFrame *recon_frame;
109
110 /**
111 * If this is set, then FFCodec->close (if existing) needs to be called
112 * for the parent AVCodecContext.
113 */
114 int needs_close;
115
116 /**
117 * Number of audio samples to skip at the start of the next decoded frame
118 */
119 int skip_samples;
120
121 /**
122 * hwaccel-specific private data
123 */
124 void *hwaccel_priv_data;
125
126 /**
127 * checks API usage: after codec draining, flush is required to resume operation
128 */
129 int draining;
130
131 /**
132 * Temporary buffers for newly received or not yet output packets/frames.
133 */
134 AVPacket *buffer_pkt;
135 AVFrame *buffer_frame;
136 int draining_done;
137
138 #if FF_API_DROPCHANGED
139 /* used when avctx flag AV_CODEC_FLAG_DROPCHANGED is set */
140 int changed_frames_dropped;
141 int initial_format;
142 int initial_width, initial_height;
143 int initial_sample_rate;
144 AVChannelLayout initial_ch_layout;
145 #endif
146
147 #if CONFIG_LCMS2
148 FFIccContext icc; /* used to read and write embedded ICC profiles */
149 #endif
150 } AVCodecInternal;
151
152 /**
153 * Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
154 * If there is no such matching pair then size is returned.
155 */
156 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
157
158 unsigned int ff_toupper4(unsigned int x);
159
160 /**
161 * 2^(x) for integer x
162 * @return correctly rounded float
163 */
164 178768 static av_always_inline float ff_exp2fi(int x) {
165 /* Normal range */
166
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178768 if (-126 <= x && x <= 128)
167 178768 return av_int2float((x+127) << 23);
168 /* Too large */
169 else if (x > 128)
170 return INFINITY;
171 /* Subnormal numbers */
172 else if (x > -150)
173 return av_int2float(1 << (x+149));
174 /* Negligibly small */
175 else
176 return 0;
177 }
178
179 int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx);
180
181 int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec);
182
183 /**
184 * Check AVFrame for S12M timecode side data and allocate and fill TC SEI message with timecode info
185 *
186 * @param frame Raw frame to get S12M timecode side data from
187 * @param rate The frame rate
188 * @param prefix_len Number of bytes to allocate before SEI message
189 * @param data Pointer to a variable to store allocated memory
190 * Upon return the variable will hold NULL on error or if frame has no S12M timecode info.
191 * Otherwise it will point to prefix_len uninitialized bytes followed by
192 * *sei_size SEI message
193 * @param sei_size Pointer to a variable to store generated SEI message length
194 * @return Zero on success, negative error code on failure
195 */
196 int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_len,
197 void **data, size_t *sei_size);
198
199 /**
200 * Get an estimated video bitrate based on frame size, frame rate and coded
201 * bits per pixel.
202 */
203 int64_t ff_guess_coded_bitrate(AVCodecContext *avctx);
204
205 #endif /* AVCODEC_INTERNAL_H */
206