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Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/internal.h | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/internal.h b/media/ffvpx/libavcodec/internal.h new file mode 100644 index 0000000000..a283c52e01 --- /dev/null +++ b/media/ffvpx/libavcodec/internal.h @@ -0,0 +1,247 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * common internal api header. + */ + +#ifndef AVCODEC_INTERNAL_H +#define AVCODEC_INTERNAL_H + +#include <stdint.h> + +#include "libavutil/buffer.h" +#include "libavutil/channel_layout.h" +#include "libavutil/mathematics.h" +#include "libavutil/pixfmt.h" +#include "avcodec.h" +#include "config.h" + +#if CONFIG_LCMS2 +# include "fflcms2.h" +#endif + +#define FF_SANE_NB_CHANNELS 512U + +#if HAVE_SIMD_ALIGN_64 +# define STRIDE_ALIGN 64 /* AVX-512 */ +#elif HAVE_SIMD_ALIGN_32 +# define STRIDE_ALIGN 32 +#elif HAVE_SIMD_ALIGN_16 +# define STRIDE_ALIGN 16 +#else +# define STRIDE_ALIGN 8 +#endif + +typedef struct AVCodecInternal { + /** + * When using frame-threaded decoding, this field is set for the first + * worker thread (e.g. to decode extradata just once). + */ + int is_copy; + + /** + * An audio frame with less than required samples has been submitted (and + * potentially padded with silence). Reject all subsequent frames. + */ + int last_audio_frame; + + /** + * Audio encoders can set this flag during init to indicate that they + * want the small last frame to be padded to a multiple of pad_samples. + */ + int pad_samples; + + AVBufferRef *pool; + + void *thread_ctx; + + /** + * This packet is used to hold the packet given to decoders + * implementing the .decode API; it is unused by the generic + * code for decoders implementing the .receive_frame API and + * may be freely used (but not freed) by them with the caveat + * that the packet will be unreferenced generically in + * avcodec_flush_buffers(). + */ + AVPacket *in_pkt; + struct AVBSFContext *bsf; + + /** + * Properties (timestamps+side data) extracted from the last packet passed + * for decoding. + */ + AVPacket *last_pkt_props; + + /** + * temporary buffer used for encoders to store their bitstream + */ + uint8_t *byte_buffer; + unsigned int byte_buffer_size; + + /** + * This is set to AV_PKT_FLAG_KEY for encoders that encode intra-only + * formats (i.e. whose codec descriptor has AV_CODEC_PROP_INTRA_ONLY set). + * This is used to set said flag generically for said encoders. + */ + int intra_only_flag; + + void *frame_thread_encoder; + + /** + * The input frame is stored here for encoders implementing the simple + * encode API. + * + * Not allocated in other cases. + */ + AVFrame *in_frame; + + /** + * When the AV_CODEC_FLAG_RECON_FRAME flag is used. the encoder should store + * here the reconstructed frame corresponding to the last returned packet. + * + * Not allocated in other cases. + */ + AVFrame *recon_frame; + + /** + * If this is set, then FFCodec->close (if existing) needs to be called + * for the parent AVCodecContext. + */ + int needs_close; + + /** + * Number of audio samples to skip at the start of the next decoded frame + */ + int skip_samples; + + /** + * hwaccel-specific private data + */ + void *hwaccel_priv_data; + + /** + * checks API usage: after codec draining, flush is required to resume operation + */ + int draining; + + /** + * Temporary buffers for newly received or not yet output packets/frames. + */ + AVPacket *buffer_pkt; + AVFrame *buffer_frame; + int draining_done; + + int showed_multi_packet_warning; + + /* to prevent infinite loop on errors when draining */ + int nb_draining_errors; + + /* used when avctx flag AV_CODEC_FLAG_DROPCHANGED is set */ + int changed_frames_dropped; + int initial_format; + int initial_width, initial_height; + int initial_sample_rate; + AVChannelLayout initial_ch_layout; + +#if CONFIG_LCMS2 + FFIccContext icc; /* used to read and write embedded ICC profiles */ +#endif +} AVCodecInternal; + +/** + * Return the index into tab at which {a,b} match elements {[0],[1]} of tab. + * If there is no such matching pair then size is returned. + */ +int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b); + +unsigned int ff_toupper4(unsigned int x); + +void ff_color_frame(AVFrame *frame, const int color[4]); + +/** + * Maximum size in bytes of extradata. + * This value was chosen such that every bit of the buffer is + * addressable by a 32-bit signed integer as used by get_bits. + */ +#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - AV_INPUT_BUFFER_PADDING_SIZE) + +/** + * 2^(x) for integer x + * @return correctly rounded float + */ +static av_always_inline float ff_exp2fi(int x) { + /* Normal range */ + if (-126 <= x && x <= 128) + return av_int2float((x+127) << 23); + /* Too large */ + else if (x > 128) + return INFINITY; + /* Subnormal numbers */ + else if (x > -150) + return av_int2float(1 << (x+149)); + /* Negligibly small */ + else + return 0; +} + +int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx); + +int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec); + +/** + * Add a CPB properties side data to an encoding context. + */ +AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx); + +/** + * Check AVFrame for S12M timecode side data and allocate and fill TC SEI message with timecode info + * + * @param frame Raw frame to get S12M timecode side data from + * @param rate The frame rate + * @param prefix_len Number of bytes to allocate before SEI message + * @param data Pointer to a variable to store allocated memory + * Upon return the variable will hold NULL on error or if frame has no S12M timecode info. + * Otherwise it will point to prefix_len uninitialized bytes followed by + * *sei_size SEI message + * @param sei_size Pointer to a variable to store generated SEI message length + * @return Zero on success, negative error code on failure + */ +int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_len, + void **data, size_t *sei_size); + +/** + * Get an estimated video bitrate based on frame size, frame rate and coded + * bits per pixel. + */ +int64_t ff_guess_coded_bitrate(AVCodecContext *avctx); + +/** + * Check if a value is in the list. If not, return the default value + * + * @param ctx Context for the log msg + * @param val_name Name of the checked value, for log msg + * @param array_valid_values Array of valid int, ended with INT_MAX + * @param default_value Value return if checked value is not in the array + * @return Value or default_value. + */ +int ff_int_from_list_or_default(void *ctx, const char * val_name, int val, + const int * array_valid_values, int default_value); + +#endif /* AVCODEC_INTERNAL_H */ |