mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-22 01:05:05 +02:00
170 lines
4.8 KiB
C
170 lines
4.8 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 "s3tc.h"
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typedef struct TXDContext {
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AVFrame picture;
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} TXDContext;
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static av_cold int txd_init(AVCodecContext *avctx) {
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TXDContext *s = avctx->priv_data;
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avcodec_get_frame_defaults(&s->picture);
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avctx->coded_frame = &s->picture;
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return 0;
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}
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static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
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AVPacket *avpkt) {
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const uint8_t *buf = avpkt->data;
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TXDContext * const s = avctx->priv_data;
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AVFrame *picture = data;
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AVFrame * const p = &s->picture;
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unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags;
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unsigned int y, v;
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uint8_t *ptr;
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const uint8_t *cur = buf;
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const uint32_t *palette = (const uint32_t *)(cur + 88);
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uint32_t *pal;
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version = AV_RL32(cur);
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d3d_format = AV_RL32(cur+76);
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w = AV_RL16(cur+80);
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h = AV_RL16(cur+82);
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depth = AV_RL8 (cur+84);
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mipmap_count = AV_RL8 (cur+85);
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flags = AV_RL8 (cur+87);
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cur += 92;
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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 -1;
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}
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if (depth == 8) {
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avctx->pix_fmt = PIX_FMT_PAL8;
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cur += 1024;
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} else if (depth == 16 || depth == 32)
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avctx->pix_fmt = 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 -1;
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}
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if (p->data[0])
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avctx->release_buffer(avctx, p);
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if (av_image_check_size(w, h, 0, avctx))
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return -1;
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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 (avctx->get_buffer(avctx, p) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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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 = AV_RB32(palette+y);
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pal[y] = (v>>8) + (v<<24);
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}
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for (y=0; y<h; y++) {
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memcpy(ptr, cur, w);
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ptr += stride;
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cur += w;
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}
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} else if (depth == 16) {
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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(cur, ptr, w, h, stride);
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break;
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case FF_S3TC_DXT3:
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ff_decode_dxt3(cur, 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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memcpy(ptr, cur, w*4);
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ptr += stride;
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cur += w*4;
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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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for (; mipmap_count > 1; mipmap_count--)
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cur += AV_RL32(cur) + 4;
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*picture = s->picture;
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*data_size = sizeof(AVPicture);
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return cur - buf;
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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 -1;
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}
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static av_cold int txd_end(AVCodecContext *avctx) {
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TXDContext *s = avctx->priv_data;
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if (s->picture.data[0])
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avctx->release_buffer(avctx, &s->picture);
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return 0;
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}
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AVCodec ff_txd_decoder = {
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.name = "txd",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_TXD,
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.priv_data_size = sizeof(TXDContext),
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.init = txd_init,
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.close = txd_end,
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.decode = txd_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
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};
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