GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/txd.c Lines: 57 84 67.9 %
Date: 2020-10-23 17:01:47 Branches: 29 52 55.8 %

Line Branch Exec Source
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/*
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 * Renderware TeXture Dictionary (.txd) image decoder
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 * Copyright (c) 2007 Ivo van Poorten
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 *
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 * See also: http://wiki.multimedia.cx/index.php?title=TXD
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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/intreadwrite.h"
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#include "libavutil/imgutils.h"
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#include "bytestream.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "texturedsp.h"
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#define TXD_DXT1 0x31545844
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#define TXD_DXT3 0x33545844
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static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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                            AVPacket *avpkt) {
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    GetByteContext gb;
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    TextureDSPContext dxtc;
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16
    AVFrame * const p = data;
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    unsigned int version, w, h, d3d_format, depth, stride, flags;
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    unsigned int y, v;
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    uint8_t *ptr;
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    uint32_t *pal;
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    int i, j;
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    int ret;
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16
    if (avpkt->size < 88)
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        return AVERROR_INVALIDDATA;
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16
    ff_texturedsp_init(&dxtc);
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51
16
    bytestream2_init(&gb, avpkt->data, avpkt->size);
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16
    version         = bytestream2_get_le32(&gb);
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16
    bytestream2_skip(&gb, 72);
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16
    d3d_format      = bytestream2_get_le32(&gb);
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16
    w               = bytestream2_get_le16(&gb);
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16
    h               = bytestream2_get_le16(&gb);
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16
    depth           = bytestream2_get_byte(&gb);
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16
    bytestream2_skip(&gb, 2);
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16
    flags           = bytestream2_get_byte(&gb);
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61

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    if (version < 8 || version > 9) {
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        avpriv_report_missing_feature(avctx, "Texture data version %u", version);
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        return AVERROR_PATCHWELCOME;
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    }
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16
    if (depth == 8) {
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2
        avctx->pix_fmt = AV_PIX_FMT_PAL8;
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14
    } else if (depth == 16 || depth == 32) {
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14
        avctx->pix_fmt = AV_PIX_FMT_RGBA;
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    } else {
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        avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
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        return AVERROR_PATCHWELCOME;
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    }
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75
16
    if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
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        return ret;
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78
16
    avctx->coded_width  = FFALIGN(w, 4);
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16
    avctx->coded_height = FFALIGN(h, 4);
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81
16
    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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        return ret;
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84
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    p->pict_type = AV_PICTURE_TYPE_I;
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86
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    ptr    = p->data[0];
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16
    stride = p->linesize[0];
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89
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    if (depth == 8) {
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2
        pal = (uint32_t *) p->data[1];
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514
        for (y = 0; y < 256; y++) {
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512
            v = bytestream2_get_be32(&gb);
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512
            pal[y] = (v >> 8) + (v << 24);
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        }
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2
        if (bytestream2_get_bytes_left(&gb) < w * h)
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            return AVERROR_INVALIDDATA;
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2
        bytestream2_skip(&gb, 4);
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1026
        for (y=0; y<h; y++) {
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1024
            bytestream2_get_buffer(&gb, ptr, w);
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1024
            ptr += stride;
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        }
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14
    } else if (depth == 16) {
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14
        bytestream2_skip(&gb, 4);
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        switch (d3d_format) {
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12
        case 0:
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12
            if (!(flags & 1))
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                goto unsupported;
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        case TXD_DXT1:
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12
            if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8)
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                return AVERROR_INVALIDDATA;
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            for (j = 0; j < avctx->height; j += 4) {
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3264
                for (i = 0; i < avctx->width; i += 4) {
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3072
                    uint8_t *p = ptr + i * 4 + j * stride;
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3072
                    int step = dxtc.dxt1_block(p, stride, gb.buffer);
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3072
                    bytestream2_skip(&gb, step);
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                }
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            }
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12
            break;
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2
        case TXD_DXT3:
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2
            if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16)
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                return AVERROR_INVALIDDATA;
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128
            for (j = 0; j < avctx->height; j += 4) {
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12348
                for (i = 0; i < avctx->width; i += 4) {
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12222
                    uint8_t *p = ptr + i * 4 + j * stride;
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12222
                    int step = dxtc.dxt3_block(p, stride, gb.buffer);
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12222
                    bytestream2_skip(&gb, step);
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                }
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            }
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2
            break;
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        default:
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            goto unsupported;
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        }
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    } else if (depth == 32) {
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        switch (d3d_format) {
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        case 0x15:
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        case 0x16:
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            if (bytestream2_get_bytes_left(&gb) < h * w * 4)
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                return AVERROR_INVALIDDATA;
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            for (y=0; y<h; y++) {
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                bytestream2_get_buffer(&gb, ptr, w * 4);
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                ptr += stride;
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            }
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            break;
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        default:
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            goto unsupported;
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        }
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    }
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149
16
    *got_frame = 1;
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151
16
    return avpkt->size;
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153
unsupported:
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    avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
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    return AVERROR_PATCHWELCOME;
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}
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AVCodec ff_txd_decoder = {
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    .name           = "txd",
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    .long_name      = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_TXD,
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    .decode         = txd_decode_frame,
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    .capabilities   = AV_CODEC_CAP_DR1,
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};