| 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 */ |