GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/012v.c Lines: 69 80 86.2 %
Date: 2019-11-20 04:07:19 Branches: 21 36 58.3 %

Line Branch Exec Source
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/*
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 * 012v decoder
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 *
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 * Copyright (C) 2012 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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#include "libavutil/intreadwrite.h"
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2
static av_cold int zero12v_decode_init(AVCodecContext *avctx)
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{
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2
    avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
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2
    avctx->bits_per_raw_sample = 10;
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2
    if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
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        avpriv_request_sample(avctx, "transparency");
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2
    return 0;
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}
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1
static int zero12v_decode_frame(AVCodecContext *avctx, void *data,
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                                int *got_frame, AVPacket *avpkt)
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{
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    int line, ret;
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1
    const int width = avctx->width;
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1
    AVFrame *pic = data;
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    uint16_t *y, *u, *v;
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1
    const uint8_t *line_end, *src = avpkt->data;
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1
    int stride = avctx->width * 8 / 3;
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    if (width <= 1 || avctx->height <= 0) {
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        av_log(avctx, AV_LOG_ERROR, "Dimensions %dx%d not supported.\n", width, avctx->height);
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        return AVERROR_INVALIDDATA;
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    }
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1
    if (   avctx->codec_tag == MKTAG('0', '1', '2', 'v')
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1
        && avpkt->size % avctx->height == 0
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1
        && avpkt->size / avctx->height * 3 >= width * 8)
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1
        stride = avpkt->size / avctx->height;
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1
    if (avpkt->size < avctx->height * stride) {
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        av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
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               avpkt->size, avctx->height * stride);
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        return AVERROR_INVALIDDATA;
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    }
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1
    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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        return ret;
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1
    pic->pict_type = AV_PICTURE_TYPE_I;
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1
    pic->key_frame = 1;
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1
    line_end = avpkt->data + stride;
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241
    for (line = 0; line < avctx->height; line++) {
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240
        uint16_t y_temp[6] = {0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000};
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240
        uint16_t u_temp[3] = {0x8000, 0x8000, 0x8000};
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240
        uint16_t v_temp[3] = {0x8000, 0x8000, 0x8000};
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        int x;
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240
        y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
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240
        u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
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240
        v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
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12720
        for (x = 0; x < width; x += 6) {
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            uint32_t t;
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12720
            if (width - x < 6 || line_end - src < 16) {
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240
                y = y_temp;
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240
                u = u_temp;
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240
                v = v_temp;
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            }
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12720
            if (line_end - src < 4)
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                break;
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12720
            t = AV_RL32(src);
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12720
            src += 4;
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12720
            *u++ = t <<  6 & 0xFFC0;
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12720
            *y++ = t >>  4 & 0xFFC0;
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12720
            *v++ = t >> 14 & 0xFFC0;
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12720
            if (line_end - src < 4)
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                break;
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12720
            t = AV_RL32(src);
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12720
            src += 4;
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12720
            *y++ = t <<  6 & 0xFFC0;
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12720
            *u++ = t >>  4 & 0xFFC0;
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12720
            *y++ = t >> 14 & 0xFFC0;
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12720
            if (line_end - src < 4)
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                break;
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12720
            t = AV_RL32(src);
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12720
            src += 4;
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12720
            *v++ = t <<  6 & 0xFFC0;
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12720
            *y++ = t >>  4 & 0xFFC0;
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12720
            *u++ = t >> 14 & 0xFFC0;
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12720
            if (line_end - src < 4)
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                break;
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12720
            t = AV_RL32(src);
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12720
            src += 4;
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12720
            *y++ = t <<  6 & 0xFFC0;
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12720
            *v++ = t >>  4 & 0xFFC0;
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12720
            *y++ = t >> 14 & 0xFFC0;
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12720
            if (width - x < 6)
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240
                break;
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        }
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        if (x < width) {
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            y = x   + (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
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            u = x/2 + (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
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            v = x/2 + (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
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            memcpy(y, y_temp, sizeof(*y) * (width - x));
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            memcpy(u, u_temp, sizeof(*u) * (width - x + 1) / 2);
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            memcpy(v, v_temp, sizeof(*v) * (width - x + 1) / 2);
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        }
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        line_end += stride;
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        src = line_end - stride;
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    }
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1
    *got_frame = 1;
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1
    return avpkt->size;
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}
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AVCodec ff_zero12v_decoder = {
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    .name           = "012v",
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    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_012V,
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    .init           = zero12v_decode_init,
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    .decode         = zero12v_decode_frame,
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    .capabilities   = AV_CODEC_CAP_DR1,
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};