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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 | #define FF_SANE_NB_CHANNELS 63U | |
37 | ||
38 | #if HAVE_AVX | |
39 | # define STRIDE_ALIGN 32 | |
40 | #elif HAVE_SIMD_ALIGN_16 | |
41 | # define STRIDE_ALIGN 16 | |
42 | #else | |
43 | # define STRIDE_ALIGN 8 | |
44 | #endif | |
45 | ||
46 | typedef struct FramePool { | |
47 | /** | |
48 | * Pools for each data plane. For audio all the planes have the same size, | |
49 | * so only pools[0] is used. | |
50 | */ | |
51 | AVBufferPool *pools[4]; | |
52 | ||
53 | /* | |
54 | * Pool parameters | |
55 | */ | |
56 | int format; | |
57 | int width, height; | |
58 | int stride_align[AV_NUM_DATA_POINTERS]; | |
59 | int linesize[4]; | |
60 | int planes; | |
61 | int channels; | |
62 | int samples; | |
63 | } FramePool; | |
64 | ||
65 | typedef struct AVCodecInternal { | |
66 | /** | |
67 | * Whether the parent AVCodecContext is a copy of the context which had | |
68 | * init() called on it. | |
69 | * This is used by multithreading - shared tables and picture pointers | |
70 | * should be freed from the original context only. | |
71 | */ | |
72 | int is_copy; | |
73 | ||
74 | /** | |
75 | * Whether to allocate progress for frame threading. | |
76 | * | |
77 | * The codec must set it to 1 if it uses ff_thread_await/report_progress(), | |
78 | * then progress will be allocated in ff_thread_get_buffer(). The frames | |
79 | * then MUST be freed with ff_thread_release_buffer(). | |
80 | * | |
81 | * If the codec does not need to call the progress functions (there are no | |
82 | * dependencies between the frames), it should leave this at 0. Then it can | |
83 | * decode straight to the user-provided frames (which the user will then | |
84 | * free with av_frame_unref()), there is no need to call | |
85 | * ff_thread_release_buffer(). | |
86 | */ | |
87 | int allocate_progress; | |
88 | ||
89 | #if FF_API_OLD_ENCODE_AUDIO | |
90 | /** | |
91 | * Internal sample count used by avcodec_encode_audio() to fabricate pts. | |
92 | * Can be removed along with avcodec_encode_audio(). | |
93 | */ | |
94 | int64_t sample_count; | |
95 | #endif | |
96 | ||
97 | /** | |
98 | * An audio frame with less than required samples has been submitted and | |
99 | * padded with silence. Reject all subsequent frames. | |
100 | */ | |
101 | int last_audio_frame; | |
102 | ||
103 | AVFrame *to_free; | |
104 | ||
105 | FramePool *pool; | |
106 | ||
107 | void *thread_ctx; | |
108 | ||
109 | /** | |
110 | * Current packet as passed into the decoder, to avoid having to pass the | |
111 | * packet into every function. | |
112 | */ | |
113 | AVPacket *pkt; | |
114 | ||
115 | /** | |
116 | * temporary buffer used for encoders to store their bitstream | |
117 | */ | |
118 | uint8_t *byte_buffer; | |
119 | unsigned int byte_buffer_size; | |
120 | ||
121 | void *frame_thread_encoder; | |
122 | ||
123 | /** | |
124 | * Number of audio samples to skip at the start of the next decoded frame | |
125 | */ | |
126 | int skip_samples; | |
127 | ||
128 | /** | |
129 | * hwaccel-specific private data | |
130 | */ | |
131 | void *hwaccel_priv_data; | |
132 | } AVCodecInternal; | |
133 | ||
134 | struct AVCodecDefault { | |
135 | const uint8_t *key; | |
136 | const uint8_t *value; | |
137 | }; | |
138 | ||
139 | extern const uint8_t ff_log2_run[41]; | |
140 | ||
141 | /** | |
142 | * Return the index into tab at which {a,b} match elements {[0],[1]} of tab. | |
143 | * If there is no such matching pair then size is returned. | |
144 | */ | |
145 | int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b); | |
146 | ||
147 | unsigned int avpriv_toupper4(unsigned int x); | |
148 | ||
149 | /** | |
150 | * does needed setup of pkt_pts/pos and such for (re)get_buffer(); | |
151 | */ | |
152 | int ff_init_buffer_info(AVCodecContext *s, AVFrame *frame); | |
153 | ||
154 | ||
155 | void avpriv_color_frame(AVFrame *frame, const int color[4]); | |
156 | ||
157 | extern volatile int ff_avcodec_locked; | |
158 | int ff_lock_avcodec(AVCodecContext *log_ctx); | |
159 | int ff_unlock_avcodec(void); | |
160 | ||
161 | int avpriv_lock_avformat(void); | |
162 | int avpriv_unlock_avformat(void); | |
163 | ||
164 | /** | |
165 | * Maximum size in bytes of extradata. | |
166 | * This value was chosen such that every bit of the buffer is | |
167 | * addressable by a 32-bit signed integer as used by get_bits. | |
168 | */ | |
169 | #define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE) | |
170 | ||
171 | /** | |
172 | * Check AVPacket size and/or allocate data. | |
173 | * | |
174 | * Encoders supporting AVCodec.encode2() can use this as a convenience to | |
175 | * ensure the output packet data is large enough, whether provided by the user | |
176 | * or allocated in this function. | |
177 | * | |
178 | * @param avctx the AVCodecContext of the encoder | |
179 | * @param avpkt the AVPacket | |
180 | * If avpkt->data is already set, avpkt->size is checked | |
181 | * to ensure it is large enough. | |
182 | * If avpkt->data is NULL, a new buffer is allocated. | |
183 | * avpkt->size is set to the specified size. | |
184 | * All other AVPacket fields will be reset with av_init_packet(). | |
185 | * @param size the minimum required packet size | |
186 | * @return 0 on success, negative error code on failure | |
187 | */ | |
188 | int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size); | |
189 | ||
190 | int ff_alloc_packet(AVPacket *avpkt, int size); | |
191 | ||
192 | /** | |
193 | * Rescale from sample rate to AVCodecContext.time_base. | |
194 | */ | |
195 | static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx, | |
196 | int64_t samples) | |
197 | { | |
198 | if(samples == AV_NOPTS_VALUE) | |
199 | return AV_NOPTS_VALUE; | |
200 | return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate }, | |
201 | avctx->time_base); | |
202 | } | |
203 | ||
204 | /** | |
205 | * Get a buffer for a frame. This is a wrapper around | |
206 | * AVCodecContext.get_buffer() and should be used instead calling get_buffer() | |
207 | * directly. | |
208 | */ | |
209 | int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags); | |
210 | ||
211 | /** | |
212 | * Identical in function to av_frame_make_writable(), except it uses | |
213 | * ff_get_buffer() to allocate the buffer when needed. | |
214 | */ | |
215 | int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame); | |
216 | ||
217 | int ff_thread_can_start_frame(AVCodecContext *avctx); | |
218 | ||
219 | int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx); | |
220 | ||
221 | /** | |
222 | * Call avcodec_open2 recursively by decrementing counter, unlocking mutex, | |
223 | * calling the function and then restoring again. Assumes the mutex is | |
224 | * already locked | |
225 | */ | |
226 | int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); | |
227 | ||
228 | /** | |
229 | * Finalize buf into extradata and set its size appropriately. | |
230 | */ | |
231 | int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf); | |
232 | ||
233 | const uint8_t *avpriv_find_start_code(const uint8_t *p, | |
234 | const uint8_t *end, | |
235 | uint32_t *state); | |
236 | ||
237 | /** | |
238 | * Check that the provided frame dimensions are valid and set them on the codec | |
239 | * context. | |
240 | */ | |
241 | int ff_set_dimensions(AVCodecContext *s, int width, int height); | |
242 | ||
243 | /** | |
244 | * Check that the provided sample aspect ratio is valid and set it on the codec | |
245 | * context. | |
246 | */ | |
247 | int ff_set_sar(AVCodecContext *avctx, AVRational sar); | |
248 | ||
249 | /** | |
250 | * Add or update AV_FRAME_DATA_MATRIXENCODING side data. | |
251 | */ | |
252 | int ff_side_data_update_matrix_encoding(AVFrame *frame, | |
253 | enum AVMatrixEncoding matrix_encoding); | |
254 | ||
255 | /** | |
256 | * Select the (possibly hardware accelerated) pixel format. | |
257 | * This is a wrapper around AVCodecContext.get_format() and should be used | |
258 | * instead of calling get_format() directly. | |
259 | */ | |
260 | int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt); | |
261 | ||
262 | /** | |
263 | * Set various frame properties from the codec context / packet data. | |
264 | */ | |
265 | int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame); | |
266 | ||
267 | #endif /* AVCODEC_INTERNAL_H */ |