GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/cljrenc.c Lines: 29 34 85.3 %
Date: 2019-11-18 18:00:01 Branches: 11 16 68.8 %

Line Branch Exec Source
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/*
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 * Cirrus Logic AccuPak (CLJR) encoder
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 * Copyright (c) 2003 Alex Beregszaszi
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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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 * Cirrus Logic AccuPak encoder.
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 */
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "put_bits.h"
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typedef struct CLJRContext {
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    AVClass        *avclass;
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    int             dither_type;
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} CLJRContext;
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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                        const AVFrame *p, int *got_packet)
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{
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    CLJRContext *a = avctx->priv_data;
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    PutBitContext pb;
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    int x, y, ret;
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    uint32_t dither= avctx->frame_number;
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    static const uint32_t ordered_dither[2][2] =
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    {
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        { 0x10400000, 0x104F0000 },
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        { 0xCB2A0000, 0xCB250000 },
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    };
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    if (avctx->width%4 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
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         av_log(avctx, AV_LOG_ERROR,
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                "Widths which are not a multiple of 4 might fail with some decoders, "
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                "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->width);
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         return AVERROR_EXPERIMENTAL;
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    }
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    if ((ret = ff_alloc_packet2(avctx, pkt, 32*avctx->height*avctx->width/4, 0)) < 0)
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        return ret;
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    init_put_bits(&pb, pkt->data, pkt->size);
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    for (y = 0; y < avctx->height; y++) {
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44900
        uint8_t *luma = &p->data[0][y * p->linesize[0]];
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        uint8_t *cb   = &p->data[1][y * p->linesize[1]];
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        uint8_t *cr   = &p->data[2][y * p->linesize[2]];
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        uint8_t luma_tmp[4];
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3861800
        for (x = 0; x < avctx->width; x += 4) {
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3816900
            switch (a->dither_type) {
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            case 0: dither = 0x492A0000;                       break;
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3816900
            case 1: dither = dither * 1664525 + 1013904223;    break;
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            case 2: dither = ordered_dither[ y&1 ][ (x>>2)&1 ];break;
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            }
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3816900
            if (x+3 >= avctx->width) {
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                memset(luma_tmp, 0, sizeof(luma_tmp));
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                memcpy(luma_tmp, luma, avctx->width - x);
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                luma = luma_tmp;
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            }
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            put_bits(&pb, 5, (249*(luma[3] +  (dither>>29)   )) >> 11);
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            put_bits(&pb, 5, (249*(luma[2] + ((dither>>26)&7))) >> 11);
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            put_bits(&pb, 5, (249*(luma[1] + ((dither>>23)&7))) >> 11);
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            put_bits(&pb, 5, (249*(luma[0] + ((dither>>20)&7))) >> 11);
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            luma += 4;
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            put_bits(&pb, 6, (253*(*(cb++) + ((dither>>18)&3))) >> 10);
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            put_bits(&pb, 6, (253*(*(cr++) + ((dither>>16)&3))) >> 10);
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        }
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    }
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    flush_put_bits(&pb);
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    pkt->size   = put_bits_count(&pb) / 8;
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    pkt->flags |= AV_PKT_FLAG_KEY;
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    *got_packet = 1;
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    return 0;
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}
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#define OFFSET(x) offsetof(CLJRContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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    { "dither_type",   "Dither type",   OFFSET(dither_type),        AV_OPT_TYPE_INT, { .i64=1 }, 0, 2, VE},
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    { NULL },
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};
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static const AVClass cljr_class = {
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    .class_name = "cljr encoder",
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    .item_name  = av_default_item_name,
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    .option     = options,
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    .version    = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_cljr_encoder = {
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    .name           = "cljr",
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    .long_name      = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_CLJR,
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    .priv_data_size = sizeof(CLJRContext),
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    .encode2        = encode_frame,
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    .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
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                                                   AV_PIX_FMT_NONE },
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    .priv_class     = &cljr_class,
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};