2 * Renderware TeXture Dictionary (.txd) image decoder
3 * Copyright (c) 2007 Ivo van Poorten
5 * See also: http://wiki.multimedia.cx/index.php?title=TXD
7 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/imgutils.h"
26 #include "bytestream.h"
30 typedef struct TXDContext {
34 static av_cold int txd_init(AVCodecContext *avctx) {
35 TXDContext *s = avctx->priv_data;
37 avcodec_get_frame_defaults(&s->picture);
38 avctx->coded_frame = &s->picture;
43 static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
45 const uint8_t *buf = avpkt->data;
46 const uint8_t *buf_end = avpkt->data + avpkt->size;
47 TXDContext * const s = avctx->priv_data;
48 AVFrame *picture = data;
49 AVFrame * const p = &s->picture;
50 unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags;
53 const uint8_t *cur = buf;
54 const uint32_t *palette = (const uint32_t *)(cur + 88);
57 if (buf_end - cur < 92)
58 return AVERROR_INVALIDDATA;
59 version = AV_RL32(cur);
60 d3d_format = AV_RL32(cur+76);
63 depth = AV_RL8 (cur+84);
64 mipmap_count = AV_RL8 (cur+85);
65 flags = AV_RL8 (cur+87);
68 if (version < 8 || version > 9) {
69 av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
75 avctx->pix_fmt = PIX_FMT_PAL8;
76 if (buf_end - cur < 1024)
77 return AVERROR_INVALIDDATA;
79 } else if (depth == 16 || depth == 32)
80 avctx->pix_fmt = PIX_FMT_RGB32;
82 av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
87 avctx->release_buffer(avctx, p);
89 if (av_image_check_size(w, h, 0, avctx))
91 if (w != avctx->width || h != avctx->height)
92 avcodec_set_dimensions(avctx, w, h);
93 if (avctx->get_buffer(avctx, p) < 0) {
94 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
98 p->pict_type = AV_PICTURE_TYPE_I;
101 stride = p->linesize[0];
104 pal = (uint32_t *) p->data[1];
105 for (y=0; y<256; y++) {
106 v = AV_RB32(palette+y);
107 pal[y] = (v>>8) + (v<<24);
109 if (buf_end - cur < w * h)
110 return AVERROR_INVALIDDATA;
111 for (y=0; y<h; y++) {
116 } else if (depth == 16) {
117 switch (d3d_format) {
122 if (buf_end - cur < (w/4) * (h/4) * 8)
123 return AVERROR_INVALIDDATA;
124 ff_decode_dxt1(cur, ptr, w, h, stride);
127 if (buf_end - cur < (w/4) * (h/4) * 16)
128 return AVERROR_INVALIDDATA;
129 ff_decode_dxt3(cur, ptr, w, h, stride);
134 } else if (depth == 32) {
135 switch (d3d_format) {
138 if (buf_end - cur < h * w * 4)
139 return AVERROR_INVALIDDATA;
140 for (y=0; y<h; y++) {
141 memcpy(ptr, cur, w*4);
151 for (; mipmap_count > 1 && buf_end - cur >= 4; mipmap_count--) {
152 uint32_t length = bytestream_get_le32(&cur);
153 if (buf_end - cur < length)
158 *picture = s->picture;
159 *data_size = sizeof(AVPicture);
164 av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
168 static av_cold int txd_end(AVCodecContext *avctx) {
169 TXDContext *s = avctx->priv_data;
171 if (s->picture.data[0])
172 avctx->release_buffer(avctx, &s->picture);
177 AVCodec ff_txd_decoder = {
179 .type = AVMEDIA_TYPE_VIDEO,
181 .priv_data_size = sizeof(TXDContext),
184 .decode = txd_decode_frame,
185 .capabilities = CODEC_CAP_DR1,
186 .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),