GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/yuv4dec.c Lines: 26 29 89.7 %
Date: 2020-10-23 17:01:47 Branches: 6 8 75.0 %

Line Branch Exec Source
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/*
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 * libquicktime yuv4 decoder
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 *
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 * Copyright (c) 2011 Carl Eugen Hoyos
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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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#include "avcodec.h"
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#include "internal.h"
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static av_cold int yuv4_decode_init(AVCodecContext *avctx)
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{
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    avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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    return 0;
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}
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static int yuv4_decode_frame(AVCodecContext *avctx, void *data,
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                             int *got_frame, AVPacket *avpkt)
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{
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    AVFrame *pic = data;
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    const uint8_t *src = avpkt->data;
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    uint8_t *y, *u, *v;
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    int i, j, ret;
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    if (avpkt->size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) {
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        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
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        return AVERROR(EINVAL);
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    }
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    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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        return ret;
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    pic->key_frame = 1;
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    pic->pict_type = AV_PICTURE_TYPE_I;
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    y = pic->data[0];
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    u = pic->data[1];
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    v = pic->data[2];
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    for (i = 0; i < (avctx->height + 1) >> 1; i++) {
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        for (j = 0; j < (avctx->width + 1) >> 1; j++) {
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            u[j] = *src++ ^ 0x80;
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            v[j] = *src++ ^ 0x80;
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            y[                   2 * j    ] = *src++;
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            y[                   2 * j + 1] = *src++;
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            y[pic->linesize[0] + 2 * j    ] = *src++;
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            y[pic->linesize[0] + 2 * j + 1] = *src++;
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        }
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        y += 2 * pic->linesize[0];
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        u +=     pic->linesize[1];
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        v +=     pic->linesize[2];
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    }
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    *got_frame = 1;
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    return avpkt->size;
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}
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AVCodec ff_yuv4_decoder = {
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    .name         = "yuv4",
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    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
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    .type         = AVMEDIA_TYPE_VIDEO,
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    .id           = AV_CODEC_ID_YUV4,
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    .init         = yuv4_decode_init,
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    .decode       = yuv4_decode_frame,
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    .capabilities = AV_CODEC_CAP_DR1,
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};