internal.h

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/*
 * 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
 */

#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"

#define FF_CODEC_CAP_INIT_THREADSAFE        (1 << 0)

#define FF_CODEC_CAP_INIT_CLEANUP           (1 << 1)

#define FF_CODEC_CAP_SETS_PKT_DTS           (1 << 2)

#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM  (1 << 3)

#define FF_CODEC_CAP_EXPORTS_CROPPING       (1 << 4)

#define FF_CODEC_CAP_SLICE_THREAD_HAS_MF    (1 << 5)

#ifdef TRACE
#   define ff_tlog(ctx, ...) av_log(ctx, AV_LOG_TRACE, __VA_ARGS__)
#else
#   define ff_tlog(ctx, ...) do { } while(0)
#endif


#define FF_DEFAULT_QUANT_BIAS 999999

#define FF_QSCALE_TYPE_MPEG1 0
#define FF_QSCALE_TYPE_MPEG2 1
#define FF_QSCALE_TYPE_H264  2
#define FF_QSCALE_TYPE_VP56  3

#define FF_SANE_NB_CHANNELS 64U

#define FF_SIGNBIT(x) ((x) >> CHAR_BIT * sizeof(x) - 1)

#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 FramePool {
    AVBufferPool *pools[4];

    /*
     * Pool parameters
     */
    int format;
    int width, height;
    int stride_align[AV_NUM_DATA_POINTERS];
    int linesize[4];
    int planes;
    int channels;
    int samples;
} FramePool;

typedef struct DecodeSimpleContext {
    AVPacket *in_pkt;
    AVFrame  *out_frame;
} DecodeSimpleContext;

typedef struct DecodeFilterContext {
    AVBSFContext **bsfs;
    int         nb_bsfs;
} DecodeFilterContext;

typedef struct AVCodecInternal {
    int is_copy;

    int allocate_progress;

    int last_audio_frame;

    AVFrame *to_free;

    FramePool *pool;

    void *thread_ctx;

    DecodeSimpleContext ds;
    DecodeFilterContext filter;

    AVPacket *last_pkt_props;

    uint8_t *byte_buffer;
    unsigned int byte_buffer_size;

    void *frame_thread_encoder;

    int skip_samples;

    void *hwaccel_priv_data;

    int draining;

    AVPacket *buffer_pkt;
    int buffer_pkt_valid; // encoding: packet without data can be valid
    AVFrame *buffer_frame;
    int draining_done;
    /* set to 1 when the caller is using the old decoding API */
    int compat_decode;
    int compat_decode_warned;
    /* this variable is set by the decoder internals to signal to the old
     * API compat wrappers the amount of data consumed from the last packet */
    size_t compat_decode_consumed;
    /* when a partial packet has been consumed, this stores the remaining size
     * of the packet (that should be submitted in the next decode call */
    size_t compat_decode_partial_size;
    AVFrame *compat_decode_frame;

    int showed_multi_packet_warning;

    int skip_samples_multiplier;

    /* to prevent infinite loop on errors when draining */
    int nb_draining_errors;
} AVCodecInternal;

struct AVCodecDefault {
    const uint8_t *key;
    const uint8_t *value;
};

extern const uint8_t ff_log2_run[41];

int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);

unsigned int avpriv_toupper4(unsigned int x);

void ff_color_frame(AVFrame *frame, const int color[4]);

#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - AV_INPUT_BUFFER_PADDING_SIZE)

int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size);

attribute_deprecated int ff_alloc_packet(AVPacket *avpkt, int size);

static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
                                                        int64_t samples)
{
    if(samples == AV_NOPTS_VALUE)
        return AV_NOPTS_VALUE;
    return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
                        avctx->time_base);
}

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 ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags);

int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame);

int ff_thread_can_start_frame(AVCodecContext *avctx);

int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx);

int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);

int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf);

const uint8_t *avpriv_find_start_code(const uint8_t *p,
                                      const uint8_t *end,
                                      uint32_t *state);

int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec);

int ff_set_dimensions(AVCodecContext *s, int width, int height);

int ff_set_sar(AVCodecContext *avctx, AVRational sar);

int ff_side_data_update_matrix_encoding(AVFrame *frame,
                                        enum AVMatrixEncoding matrix_encoding);

int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt);

int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame);

AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx);

int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type);

int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len,
                     void **data, size_t *sei_size);

int64_t ff_guess_coded_bitrate(AVCodecContext *avctx);

#if defined(_WIN32) && CONFIG_SHARED && !defined(BUILDING_avcodec)
#    define av_export_avcodec __declspec(dllimport)
#else
#    define av_export_avcodec
#endif

#endif /* AVCODEC_INTERNAL_H */