mirror of https://git.ffmpeg.org/ffmpeg.git
137 lines
4.2 KiB
C
137 lines
4.2 KiB
C
/*
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "s3tc.h"
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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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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 ret;
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bytestream2_init(&gb, avpkt->data, avpkt->size);
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version = bytestream2_get_le32(&gb);
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bytestream2_skip(&gb, 72);
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d3d_format = bytestream2_get_le32(&gb);
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w = bytestream2_get_le16(&gb);
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h = bytestream2_get_le16(&gb);
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depth = bytestream2_get_byte(&gb);
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bytestream2_skip(&gb, 2);
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flags = bytestream2_get_byte(&gb);
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if (version < 8 || version > 9) {
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av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
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version);
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return AVERROR_PATCHWELCOME;
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}
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if (depth == 8) {
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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} else if (depth == 16 || depth == 32) {
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avctx->pix_fmt = AV_PIX_FMT_RGB32;
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} else {
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av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
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return AVERROR_PATCHWELCOME;
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}
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if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
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return ret;
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if (w != avctx->width || h != avctx->height)
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avcodec_set_dimensions(avctx, w, h);
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return ret;
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}
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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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if (depth == 8) {
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pal = (uint32_t *) p->data[1];
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for (y = 0; y < 256; y++) {
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v = bytestream2_get_be32(&gb);
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pal[y] = (v >> 8) + (v << 24);
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}
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bytestream2_skip(&gb, 4);
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for (y=0; y<h; y++) {
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bytestream2_get_buffer(&gb, ptr, w);
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ptr += stride;
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}
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} else if (depth == 16) {
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bytestream2_skip(&gb, 4);
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switch (d3d_format) {
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case 0:
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if (!(flags & 1))
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goto unsupported;
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case FF_S3TC_DXT1:
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ff_decode_dxt1(&gb, ptr, w, h, stride);
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break;
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case FF_S3TC_DXT3:
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ff_decode_dxt3(&gb, ptr, w, h, stride);
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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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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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*got_frame = 1;
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return avpkt->size;
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unsupported:
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av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", 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 = CODEC_CAP_DR1,
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};
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