| 1 | /* |
| 2 | * Renderware TeXture Dictionary (.txd) image decoder |
| 3 | * Copyright (c) 2007 Ivo van Poorten |
| 4 | * |
| 5 | * See also: http://wiki.multimedia.cx/index.php?title=TXD |
| 6 | * |
| 7 | * This file is part of FFmpeg. |
| 8 | * |
| 9 | * FFmpeg is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2.1 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * FFmpeg is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with FFmpeg; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | #include "libavutil/intreadwrite.h" |
| 25 | #include "libavutil/imgutils.h" |
| 26 | #include "bytestream.h" |
| 27 | #include "avcodec.h" |
| 28 | #include "internal.h" |
| 29 | #include "s3tc.h" |
| 30 | |
| 31 | static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 32 | AVPacket *avpkt) { |
| 33 | GetByteContext gb; |
| 34 | AVFrame * const p = data; |
| 35 | unsigned int version, w, h, d3d_format, depth, stride, flags; |
| 36 | unsigned int y, v; |
| 37 | uint8_t *ptr; |
| 38 | uint32_t *pal; |
| 39 | int ret; |
| 40 | |
| 41 | bytestream2_init(&gb, avpkt->data, avpkt->size); |
| 42 | version = bytestream2_get_le32(&gb); |
| 43 | bytestream2_skip(&gb, 72); |
| 44 | d3d_format = bytestream2_get_le32(&gb); |
| 45 | w = bytestream2_get_le16(&gb); |
| 46 | h = bytestream2_get_le16(&gb); |
| 47 | depth = bytestream2_get_byte(&gb); |
| 48 | bytestream2_skip(&gb, 2); |
| 49 | flags = bytestream2_get_byte(&gb); |
| 50 | |
| 51 | if (version < 8 || version > 9) { |
| 52 | av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n", |
| 53 | version); |
| 54 | return AVERROR_PATCHWELCOME; |
| 55 | } |
| 56 | |
| 57 | if (depth == 8) { |
| 58 | avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| 59 | } else if (depth == 16 || depth == 32) { |
| 60 | avctx->pix_fmt = AV_PIX_FMT_RGB32; |
| 61 | } else { |
| 62 | av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth); |
| 63 | return AVERROR_PATCHWELCOME; |
| 64 | } |
| 65 | |
| 66 | if ((ret = ff_set_dimensions(avctx, w, h)) < 0) |
| 67 | return ret; |
| 68 | |
| 69 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
| 70 | return ret; |
| 71 | |
| 72 | p->pict_type = AV_PICTURE_TYPE_I; |
| 73 | |
| 74 | ptr = p->data[0]; |
| 75 | stride = p->linesize[0]; |
| 76 | |
| 77 | if (depth == 8) { |
| 78 | pal = (uint32_t *) p->data[1]; |
| 79 | for (y = 0; y < 256; y++) { |
| 80 | v = bytestream2_get_be32(&gb); |
| 81 | pal[y] = (v >> 8) + (v << 24); |
| 82 | } |
| 83 | if (bytestream2_get_bytes_left(&gb) < w * h) |
| 84 | return AVERROR_INVALIDDATA; |
| 85 | bytestream2_skip(&gb, 4); |
| 86 | for (y=0; y<h; y++) { |
| 87 | bytestream2_get_buffer(&gb, ptr, w); |
| 88 | ptr += stride; |
| 89 | } |
| 90 | } else if (depth == 16) { |
| 91 | bytestream2_skip(&gb, 4); |
| 92 | switch (d3d_format) { |
| 93 | case 0: |
| 94 | if (!(flags & 1)) |
| 95 | goto unsupported; |
| 96 | case FF_S3TC_DXT1: |
| 97 | if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 8) |
| 98 | return AVERROR_INVALIDDATA; |
| 99 | ff_decode_dxt1(&gb, ptr, w, h, stride); |
| 100 | break; |
| 101 | case FF_S3TC_DXT3: |
| 102 | if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 16) |
| 103 | return AVERROR_INVALIDDATA; |
| 104 | ff_decode_dxt3(&gb, ptr, w, h, stride); |
| 105 | break; |
| 106 | default: |
| 107 | goto unsupported; |
| 108 | } |
| 109 | } else if (depth == 32) { |
| 110 | switch (d3d_format) { |
| 111 | case 0x15: |
| 112 | case 0x16: |
| 113 | if (bytestream2_get_bytes_left(&gb) < h * w * 4) |
| 114 | return AVERROR_INVALIDDATA; |
| 115 | for (y=0; y<h; y++) { |
| 116 | bytestream2_get_buffer(&gb, ptr, w * 4); |
| 117 | ptr += stride; |
| 118 | } |
| 119 | break; |
| 120 | default: |
| 121 | goto unsupported; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | *got_frame = 1; |
| 126 | |
| 127 | return avpkt->size; |
| 128 | |
| 129 | unsupported: |
| 130 | av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format); |
| 131 | return AVERROR_PATCHWELCOME; |
| 132 | } |
| 133 | |
| 134 | AVCodec ff_txd_decoder = { |
| 135 | .name = "txd", |
| 136 | .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"), |
| 137 | .type = AVMEDIA_TYPE_VIDEO, |
| 138 | .id = AV_CODEC_ID_TXD, |
| 139 | .decode = txd_decode_frame, |
| 140 | .capabilities = CODEC_CAP_DR1, |
| 141 | }; |