GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/ptx.c Lines: 27 37 73.0 %
Date: 2019-11-18 18:00:01 Branches: 11 20 55.0 %

Line Branch Exec Source
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/*
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 * V.Flash PTX (.ptx) image decoder
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 * Copyright (c) 2007 Ivo van Poorten
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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 "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "internal.h"
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static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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                            AVPacket *avpkt) {
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    const uint8_t *buf = avpkt->data;
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    const uint8_t *buf_end = avpkt->data + avpkt->size;
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    AVFrame * const p = data;
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    unsigned int offset, w, h, y, stride, bytes_per_pixel;
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    int ret;
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    uint8_t *ptr;
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    if (buf_end - buf < 14)
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        return AVERROR_INVALIDDATA;
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    offset          = AV_RL16(buf);
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    w               = AV_RL16(buf+8);
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    h               = AV_RL16(buf+10);
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    bytes_per_pixel = AV_RL16(buf+12) >> 3;
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    if (bytes_per_pixel != 2) {
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        avpriv_request_sample(avctx, "Image format not RGB15");
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        return AVERROR_PATCHWELCOME;
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    }
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    avctx->pix_fmt = AV_PIX_FMT_BGR555LE;
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    if (buf_end - buf < offset)
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        return AVERROR_INVALIDDATA;
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    if (offset != 0x2c)
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        avpriv_request_sample(avctx, "offset != 0x2c");
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    buf += offset;
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    if (buf_end - buf < w * bytes_per_pixel)
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        return AVERROR_INVALIDDATA;
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    if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
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        return ret;
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    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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        return ret;
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    p->pict_type = AV_PICTURE_TYPE_I;
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    ptr    = p->data[0];
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    stride = p->linesize[0];
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    for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) {
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        memcpy(ptr, buf, w*bytes_per_pixel);
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        ptr += stride;
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        buf += w*bytes_per_pixel;
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    }
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    *got_frame = 1;
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    if (y < h) {
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        av_log(avctx, AV_LOG_WARNING, "incomplete packet\n");
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        return avpkt->size;
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    }
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    return offset + w*h*bytes_per_pixel;
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}
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AVCodec ff_ptx_decoder = {
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    .name           = "ptx",
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    .long_name      = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_PTX,
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    .decode         = ptx_decode_frame,
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    .capabilities   = AV_CODEC_CAP_DR1,
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};