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_NEON || ARCH_PPC || HAVE_MMX 41# define STRIDE_ALIGN 16 42#else 43# define STRIDE_ALIGN 8 44#endif 45 46typedef 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 65typedef 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 134struct AVCodecDefault { 135 const uint8_t *key; 136 const uint8_t *value; 137}; 138 139extern 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 */ 145int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b); 146 147unsigned int avpriv_toupper4(unsigned int x); 148 149/** 150 * does needed setup of pkt_pts/pos and such for (re)get_buffer(); 151 */ 152int ff_init_buffer_info(AVCodecContext *s, AVFrame *frame); 153 154 155void avpriv_color_frame(AVFrame *frame, const int color[4]); 156 157extern volatile int ff_avcodec_locked; 158int ff_lock_avcodec(AVCodecContext *log_ctx); 159int ff_unlock_avcodec(void); 160 161int avpriv_lock_avformat(void); 162int 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 */ 188int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size); 189 190int ff_alloc_packet(AVPacket *avpkt, int size); 191 192/** 193 * Rescale from sample rate to AVCodecContext.time_base. 194 */ 195static 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 */ 209int 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 */ 215int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame); 216 217int ff_thread_can_start_frame(AVCodecContext *avctx); 218 219int 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 */ 226int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); 227 228/** 229 * Finalize buf into extradata and set its size appropriately. 230 */ 231int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf); 232 233const 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 */ 241int 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 */ 247int ff_set_sar(AVCodecContext *avctx, AVRational sar); 248 249/** 250 * Add or update AV_FRAME_DATA_MATRIXENCODING side data. 251 */ 252int 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 */ 260int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt); 261 262/** 263 * Set various frame properties from the codec context / packet data. 264 */ 265int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame); 266 267#endif /* AVCODEC_INTERNAL_H */ 268