GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/speedhqenc.c Lines: 0 131 0.0 %
Date: 2021-04-18 10:33:33 Branches: 0 40 0.0 %

Line Branch Exec Source
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/*
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 * SpeedHQ encoder
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 * Copyright (c) 2000, 2001 Fabrice Bellard
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 * Copyright (c) 2003 Alex Beregszaszi
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 * Copyright (c) 2003-2004 Michael Niedermayer
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 * Copyright (c) 2020 FFmpeg
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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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/**
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 * @file
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 * SpeedHQ encoder.
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 */
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#include "libavutil/pixdesc.h"
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#include "libavutil/thread.h"
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#include "avcodec.h"
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#include "mpeg12.h"
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#include "mpegvideo.h"
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#include "speedhqenc.h"
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extern RLTable ff_rl_speedhq;
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static uint8_t speedhq_static_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3];
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static uint16_t mpeg12_vlc_dc_lum_code_reversed[12];
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static uint16_t mpeg12_vlc_dc_chroma_code_reversed[12];
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/* simple include everything table for dc, first byte is bits
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 * number next 3 are code */
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static uint32_t speedhq_lum_dc_uni[512];
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static uint32_t speedhq_chr_dc_uni[512];
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static uint8_t uni_speedhq_ac_vlc_len[64 * 64 * 2];
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static uint32_t reverse(uint32_t num, int bits)
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{
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    return bitswap_32(num) >> (32 - bits);
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}
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static void reverse_code(const uint16_t *code, const uint8_t *bits,
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                         uint16_t *reversed_code, int num_entries)
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{
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    for (int i = 0; i < num_entries; i++)
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        reversed_code[i] = reverse(code[i], bits[i]);
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}
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static av_cold void speedhq_init_static_data(void)
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{
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    /* Exactly the same as MPEG-2, except little-endian. */
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    reverse_code(ff_mpeg12_vlc_dc_lum_code,
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                 ff_mpeg12_vlc_dc_lum_bits,
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                 mpeg12_vlc_dc_lum_code_reversed,
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                 12);
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    reverse_code(ff_mpeg12_vlc_dc_chroma_code,
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                 ff_mpeg12_vlc_dc_chroma_bits,
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                 mpeg12_vlc_dc_chroma_code_reversed,
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                 12);
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    ff_rl_init(&ff_rl_speedhq, speedhq_static_rl_table_store);
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    /* build unified dc encoding tables */
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    for (int i = -255; i < 256; i++) {
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        int adiff, index;
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        int bits, code;
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        int diff = i;
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        adiff = FFABS(diff);
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        if (diff < 0)
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            diff--;
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        index = av_log2(2 * adiff);
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        bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
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        code = mpeg12_vlc_dc_lum_code_reversed[index] +
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                (av_mod_uintp2(diff, index) << ff_mpeg12_vlc_dc_lum_bits[index]);
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        speedhq_lum_dc_uni[i + 255] = bits + (code << 8);
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        bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
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        code = mpeg12_vlc_dc_chroma_code_reversed[index] +
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                (av_mod_uintp2(diff, index) << ff_mpeg12_vlc_dc_chroma_bits[index]);
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        speedhq_chr_dc_uni[i + 255] = bits + (code << 8);
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    }
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    ff_mpeg1_init_uni_ac_vlc(&ff_rl_speedhq, uni_speedhq_ac_vlc_len);
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}
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av_cold int ff_speedhq_encode_init(MpegEncContext *s)
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{
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    static AVOnce init_static_once = AV_ONCE_INIT;
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    av_assert0(s->slice_context_count == 1);
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    if (s->width > 65500 || s->height > 65500) {
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        av_log(s, AV_LOG_ERROR, "SpeedHQ does not support resolutions above 65500x65500\n");
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        return AVERROR(EINVAL);
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    }
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    s->min_qcoeff = -2048;
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    s->max_qcoeff = 2047;
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    ff_thread_once(&init_static_once, speedhq_init_static_data);
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    s->intra_ac_vlc_length      =
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    s->intra_ac_vlc_last_length =
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    s->intra_chroma_ac_vlc_length      =
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    s->intra_chroma_ac_vlc_last_length = uni_speedhq_ac_vlc_len;
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    switch (s->avctx->pix_fmt) {
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    case AV_PIX_FMT_YUV420P:
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        s->avctx->codec_tag = MKTAG('S','H','Q','0');
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        break;
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    case AV_PIX_FMT_YUV422P:
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        s->avctx->codec_tag = MKTAG('S','H','Q','2');
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        break;
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    case AV_PIX_FMT_YUV444P:
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        s->avctx->codec_tag = MKTAG('S','H','Q','4');
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        break;
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    default:
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        av_assert0(0);
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    }
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    return 0;
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}
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void ff_speedhq_encode_picture_header(MpegEncContext *s)
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{
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    put_bits_le(&s->pb, 8, 100 - s->qscale * 2);  /* FIXME why doubled */
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    put_bits_le(&s->pb, 24, 4);  /* no second field */
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    /* length of first slice, will be filled out later */
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    s->slice_start = 4;
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    put_bits_le(&s->pb, 24, 0);
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}
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void ff_speedhq_end_slice(MpegEncContext *s)
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{
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    int slice_len;
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    flush_put_bits_le(&s->pb);
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    slice_len = s->pb.buf_ptr - (s->pb.buf + s->slice_start);
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    AV_WL24(s->pb.buf + s->slice_start, slice_len);
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    /* length of next slice, will be filled out later */
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    s->slice_start = s->pb.buf_ptr - s->pb.buf;
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    put_bits_le(&s->pb, 24, 0);
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}
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static inline void encode_dc(PutBitContext *pb, int diff, int component)
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{
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    unsigned int diff_u = diff + 255;
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    if (diff_u >= 511) {
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        int index;
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        if (diff < 0) {
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            index = av_log2_16bit(-2 * diff);
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            diff--;
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        } else {
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            index = av_log2_16bit(2 * diff);
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        }
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        if (component == 0)
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            put_bits_le(pb,
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                        ff_mpeg12_vlc_dc_lum_bits[index] + index,
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                        mpeg12_vlc_dc_lum_code_reversed[index] +
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                        (av_mod_uintp2(diff, index) << ff_mpeg12_vlc_dc_lum_bits[index]));
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        else
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            put_bits_le(pb,
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                        ff_mpeg12_vlc_dc_chroma_bits[index] + index,
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                        mpeg12_vlc_dc_chroma_code_reversed[index] +
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                        (av_mod_uintp2(diff, index) << ff_mpeg12_vlc_dc_chroma_bits[index]));
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    } else {
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        if (component == 0)
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            put_bits_le(pb,
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                        speedhq_lum_dc_uni[diff + 255] & 0xFF,
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                        speedhq_lum_dc_uni[diff + 255] >> 8);
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        else
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            put_bits_le(pb,
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                        speedhq_chr_dc_uni[diff + 255] & 0xFF,
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                        speedhq_chr_dc_uni[diff + 255] >> 8);
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    }
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}
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static void encode_block(MpegEncContext *s, int16_t *block, int n)
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{
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    int alevel, level, last_non_zero, dc, i, j, run, last_index, sign;
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    int code;
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    int component, val;
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    /* DC coef */
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    component = (n <= 3 ? 0 : (n&1) + 1);
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    dc = block[0]; /* overflow is impossible */
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    val = s->last_dc[component] - dc;  /* opposite of most codecs */
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    encode_dc(&s->pb, val, component);
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    s->last_dc[component] = dc;
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    /* now quantify & encode AC coefs */
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    last_non_zero = 0;
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    last_index = s->block_last_index[n];
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    for (i = 1; i <= last_index; i++) {
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        j     = s->intra_scantable.permutated[i];
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        level = block[j];
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        /* encode using VLC */
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        if (level != 0) {
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            run = i - last_non_zero - 1;
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            alevel = level;
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            MASK_ABS(sign, alevel);
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            sign &= 1;
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            if (alevel <= ff_rl_speedhq.max_level[0][run]) {
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                code = ff_rl_speedhq.index_run[0][run] + alevel - 1;
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                /* store the VLC & sign at once */
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                put_bits_le(&s->pb, ff_rl_speedhq.table_vlc[code][1] + 1,
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                            ff_rl_speedhq.table_vlc[code][0] + (sign << ff_rl_speedhq.table_vlc[code][1]));
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            } else {
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                /* escape seems to be pretty rare <5% so I do not optimize it */
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                put_bits_le(&s->pb, ff_rl_speedhq.table_vlc[121][1], ff_rl_speedhq.table_vlc[121][0]);
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                /* escape: only clip in this case */
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                put_bits_le(&s->pb, 6, run);
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                put_bits_le(&s->pb, 12, level + 2048);
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            }
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            last_non_zero = i;
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        }
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    }
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    /* end of block */
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    put_bits_le(&s->pb, ff_rl_speedhq.table_vlc[122][1], ff_rl_speedhq.table_vlc[122][0]);
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}
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void ff_speedhq_encode_mb(MpegEncContext *s, int16_t block[12][64])
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{
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    int i;
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    for(i=0;i<6;i++) {
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        encode_block(s, block[i], i);
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    }
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    if (s->chroma_format == CHROMA_444) {
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        encode_block(s, block[8], 8);
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        encode_block(s, block[9], 9);
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        encode_block(s, block[6], 6);
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        encode_block(s, block[7], 7);
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        encode_block(s, block[10], 10);
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        encode_block(s, block[11], 11);
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    } else if (s->chroma_format == CHROMA_422) {
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        encode_block(s, block[6], 6);
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        encode_block(s, block[7], 7);
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    }
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    s->i_tex_bits += get_bits_diff(s);
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}
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static int ff_speedhq_mb_rows_in_slice(int slice_num, int mb_height)
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{
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    return mb_height / 4 + (slice_num < (mb_height % 4));
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}
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int ff_speedhq_mb_y_order_to_mb(int mb_y_order, int mb_height, int *first_in_slice)
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{
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    int slice_num = 0;
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    while (mb_y_order >= ff_speedhq_mb_rows_in_slice(slice_num, mb_height)) {
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         mb_y_order -= ff_speedhq_mb_rows_in_slice(slice_num, mb_height);
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         slice_num++;
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    }
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    *first_in_slice = (mb_y_order == 0);
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    return mb_y_order * 4 + slice_num;
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}
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#if CONFIG_SPEEDHQ_ENCODER
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static const AVClass speedhq_class = {
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    .class_name = "speedhq encoder",
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    .item_name  = av_default_item_name,
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    .option     = ff_mpv_generic_options,
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    .version    = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_speedhq_encoder = {
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    .name           = "speedhq",
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    .long_name      = NULL_IF_CONFIG_SMALL("NewTek SpeedHQ"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_SPEEDHQ,
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    .priv_data_size = sizeof(MpegEncContext),
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    .init           = ff_mpv_encode_init,
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    .encode2        = ff_mpv_encode_picture,
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    .close          = ff_mpv_encode_end,
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    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
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    .pix_fmts       = (const enum AVPixelFormat[]) {
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        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
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        AV_PIX_FMT_NONE
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    },
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    .priv_class     = &speedhq_class,
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};
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#endif