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- /*
- * Renderware TeXture Dictionary (.txd) image decoder
- * Copyright (c) 2007 Ivo van Poorten
- *
- * See also: http://wiki.multimedia.cx/index.php?title=TXD
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #include "libavutil/intreadwrite.h"
- #include "avcodec.h"
- #include "s3tc.h"
- typedef struct TXDContext {
- AVFrame picture;
- } TXDContext;
- static av_cold int txd_init(AVCodecContext *avctx) {
- TXDContext *s = avctx->priv_data;
- avcodec_get_frame_defaults(&s->picture);
- avctx->coded_frame = &s->picture;
- return 0;
- }
- static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- const uint8_t *buf, int buf_size) {
- TXDContext * const s = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame * const p = &s->picture;
- unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags;
- unsigned int y, v;
- uint8_t *ptr;
- const uint8_t *cur = buf;
- const uint32_t *palette = (const uint32_t *)(cur + 88);
- uint32_t *pal;
- version = AV_RL32(cur);
- d3d_format = AV_RL32(cur+76);
- w = AV_RL16(cur+80);
- h = AV_RL16(cur+82);
- depth = AV_RL8 (cur+84);
- mipmap_count = AV_RL8 (cur+85);
- flags = AV_RL8 (cur+87);
- cur += 92;
- if (version < 8 || version > 9) {
- av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
- version);
- return -1;
- }
- if (depth == 8) {
- avctx->pix_fmt = PIX_FMT_PAL8;
- cur += 1024;
- } else if (depth == 16 || depth == 32)
- avctx->pix_fmt = PIX_FMT_RGB32;
- else {
- av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
- return -1;
- }
- if (p->data[0])
- avctx->release_buffer(avctx, p);
- if (avcodec_check_dimensions(avctx, w, h))
- return -1;
- if (w != avctx->width || h != avctx->height)
- avcodec_set_dimensions(avctx, w, h);
- if (avctx->get_buffer(avctx, p) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
- p->pict_type = FF_I_TYPE;
- ptr = p->data[0];
- stride = p->linesize[0];
- if (depth == 8) {
- pal = (uint32_t *) p->data[1];
- for (y=0; y<256; y++) {
- v = AV_RB32(palette+y);
- pal[y] = (v>>8) + (v<<24);
- }
- for (y=0; y<h; y++) {
- memcpy(ptr, cur, w);
- ptr += stride;
- cur += w;
- }
- } else if (depth == 16) {
- switch (d3d_format) {
- case 0:
- if (!flags&1) goto unsupported;
- case FF_S3TC_DXT1:
- ff_decode_dxt1(cur, ptr, w, h, stride);
- break;
- case FF_S3TC_DXT3:
- ff_decode_dxt3(cur, ptr, w, h, stride);
- break;
- default:
- goto unsupported;
- }
- } else if (depth == 32) {
- switch (d3d_format) {
- case 0x15:
- case 0x16:
- for (y=0; y<h; y++) {
- memcpy(ptr, cur, w*4);
- ptr += stride;
- cur += w*4;
- }
- break;
- default:
- goto unsupported;
- }
- }
- for (; mipmap_count > 1; mipmap_count--)
- cur += AV_RL32(cur) + 4;
- *picture = s->picture;
- *data_size = sizeof(AVPicture);
- return cur - buf;
- unsupported:
- av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
- return -1;
- }
- static av_cold int txd_end(AVCodecContext *avctx) {
- TXDContext *s = avctx->priv_data;
- if (s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
- return 0;
- }
- AVCodec txd_decoder = {
- "txd",
- CODEC_TYPE_VIDEO,
- CODEC_ID_TXD,
- sizeof(TXDContext),
- txd_init,
- NULL,
- txd_end,
- txd_decode_frame,
- 0,
- NULL,
- .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
- };
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