GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/ffv1.h Lines: 24 24 100.0 %
Date: 2019-11-22 03:34:36 Branches: 12 12 100.0 %

Line Branch Exec Source
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/*
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 * FFV1 codec for libavcodec
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 *
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 * Copyright (c) 2003-2012 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_FFV1_H
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#define AVCODEC_FFV1_H
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/**
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 * @file
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 * FF Video Codec 1 (a lossless codec)
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 */
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#include "libavutil/avassert.h"
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#include "libavutil/crc.h"
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/timer.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "mathops.h"
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#include "put_bits.h"
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#include "rangecoder.h"
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#include "thread.h"
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#ifdef __INTEL_COMPILER
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#undef av_flatten
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#define av_flatten
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#endif
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#define MAX_PLANES 4
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#define CONTEXT_SIZE 32
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#define MAX_QUANT_TABLES 8
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#define MAX_CONTEXT_INPUTS 5
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#define AC_GOLOMB_RICE          0
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#define AC_RANGE_DEFAULT_TAB    1
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#define AC_RANGE_CUSTOM_TAB     2
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#define AC_RANGE_DEFAULT_TAB_FORCE -2
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typedef struct VlcState {
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    int16_t drift;
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    uint16_t error_sum;
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    int8_t bias;
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    uint8_t count;
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} VlcState;
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typedef struct PlaneContext {
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    int16_t quant_table[MAX_CONTEXT_INPUTS][256];
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    int quant_table_index;
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    int context_count;
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    uint8_t (*state)[CONTEXT_SIZE];
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    VlcState *vlc_state;
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    uint8_t interlace_bit_state[2];
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} PlaneContext;
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#define MAX_SLICES 1024
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typedef struct FFV1Context {
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    AVClass *class;
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    AVCodecContext *avctx;
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    RangeCoder c;
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    GetBitContext gb;
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    PutBitContext pb;
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    uint64_t rc_stat[256][2];
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    uint64_t (*rc_stat2[MAX_QUANT_TABLES])[32][2];
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    int version;
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    int micro_version;
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    int width, height;
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    int chroma_planes;
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    int chroma_h_shift, chroma_v_shift;
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    int transparency;
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    int flags;
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    int picture_number;
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    int key_frame;
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    ThreadFrame picture, last_picture;
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    struct FFV1Context *fsrc;
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    AVFrame *cur;
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    int plane_count;
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    int ac;                              ///< 1=range coder <-> 0=golomb rice
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    int ac_byte_count;                   ///< number of bytes used for AC coding
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    PlaneContext plane[MAX_PLANES];
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    int16_t quant_table[MAX_CONTEXT_INPUTS][256];
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    int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256];
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    int context_count[MAX_QUANT_TABLES];
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    uint8_t state_transition[256];
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    uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
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    int run_index;
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    int colorspace;
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    int16_t *sample_buffer;
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    int32_t *sample_buffer32;
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    int use32bit;
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    int ec;
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    int intra;
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    int slice_damaged;
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    int key_frame_ok;
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    int context_model;
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    int bits_per_raw_sample;
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    int packed_at_lsb;
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    int gob_count;
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    int quant_table_count;
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    struct FFV1Context *slice_context[MAX_SLICES];
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    int slice_count;
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    int max_slice_count;
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    int num_v_slices;
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    int num_h_slices;
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    int slice_width;
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    int slice_height;
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    int slice_x;
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    int slice_y;
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    int slice_reset_contexts;
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    int slice_coding_mode;
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    int slice_rct_by_coef;
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    int slice_rct_ry_coef;
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} FFV1Context;
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int ff_ffv1_common_init(AVCodecContext *avctx);
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int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs);
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int ff_ffv1_init_slices_state(FFV1Context *f);
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int ff_ffv1_init_slice_contexts(FFV1Context *f);
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int ff_ffv1_allocate_initial_states(FFV1Context *f);
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void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs);
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int ff_ffv1_close(AVCodecContext *avctx);
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static av_always_inline int fold(int diff, int bits)
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{
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    if (bits == 8)
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        diff = (int8_t)diff;
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    else {
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        diff = sign_extend(diff, bits);
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    }
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    return diff;
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}
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static inline void update_vlc_state(VlcState *const state, const int v)
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{
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    int drift = state->drift;
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    int count = state->count;
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    state->error_sum += FFABS(v);
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    drift            += v;
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    if (count == 128) { // FIXME: variable
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        count            >>= 1;
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        drift            >>= 1;
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        state->error_sum >>= 1;
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    }
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    count++;
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    if (drift <= -count) {
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        state->bias = FFMAX(state->bias - 1, -128);
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        drift = FFMAX(drift + count, -count + 1);
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    } else if (drift > 0) {
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        state->bias = FFMIN(state->bias + 1, 127);
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        drift = FFMIN(drift - count, 0);
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    }
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    state->drift = drift;
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    state->count = count;
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}
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#define TYPE int16_t
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#define RENAME(name) name
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#include "ffv1_template.c"
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#undef TYPE
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#undef RENAME
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#define TYPE int32_t
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#define RENAME(name) name ## 32
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#include "ffv1_template.c"
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#undef TYPE
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#undef RENAME
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#endif /* AVCODEC_FFV1_H */