yading@10: /*
yading@10:  * Renderware TeXture Dictionary (.txd) image decoder
yading@10:  * Copyright (c) 2007 Ivo van Poorten
yading@10:  *
yading@10:  * See also: http://wiki.multimedia.cx/index.php?title=TXD
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "libavutil/intreadwrite.h"
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "bytestream.h"
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: #include "s3tc.h"
yading@10: 
yading@10: static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
yading@10:                             AVPacket *avpkt) {
yading@10:     GetByteContext gb;
yading@10:     AVFrame * const p = data;
yading@10:     unsigned int version, w, h, d3d_format, depth, stride, flags;
yading@10:     unsigned int y, v;
yading@10:     uint8_t *ptr;
yading@10:     uint32_t *pal;
yading@10:     int ret;
yading@10: 
yading@10:     bytestream2_init(&gb, avpkt->data, avpkt->size);
yading@10:     version         = bytestream2_get_le32(&gb);
yading@10:     bytestream2_skip(&gb, 72);
yading@10:     d3d_format      = bytestream2_get_le32(&gb);
yading@10:     w               = bytestream2_get_le16(&gb);
yading@10:     h               = bytestream2_get_le16(&gb);
yading@10:     depth           = bytestream2_get_byte(&gb);
yading@10:     bytestream2_skip(&gb, 2);
yading@10:     flags           = bytestream2_get_byte(&gb);
yading@10: 
yading@10:     if (version < 8 || version > 9) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
yading@10:                                                                     version);
yading@10:         return AVERROR_PATCHWELCOME;
yading@10:     }
yading@10: 
yading@10:     if (depth == 8) {
yading@10:         avctx->pix_fmt = AV_PIX_FMT_PAL8;
yading@10:     } else if (depth == 16 || depth == 32) {
yading@10:         avctx->pix_fmt = AV_PIX_FMT_RGB32;
yading@10:     } else {
yading@10:         av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
yading@10:         return AVERROR_PATCHWELCOME;
yading@10:     }
yading@10: 
yading@10:     if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
yading@10:         return ret;
yading@10:     if (w != avctx->width || h != avctx->height)
yading@10:         avcodec_set_dimensions(avctx, w, h);
yading@10:     if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     p->pict_type = AV_PICTURE_TYPE_I;
yading@10: 
yading@10:     ptr    = p->data[0];
yading@10:     stride = p->linesize[0];
yading@10: 
yading@10:     if (depth == 8) {
yading@10:         pal = (uint32_t *) p->data[1];
yading@10:         for (y = 0; y < 256; y++) {
yading@10:             v = bytestream2_get_be32(&gb);
yading@10:             pal[y] = (v >> 8) + (v << 24);
yading@10:         }
yading@10:         if (bytestream2_get_bytes_left(&gb) < w * h)
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         bytestream2_skip(&gb, 4);
yading@10:         for (y=0; y<h; y++) {
yading@10:             bytestream2_get_buffer(&gb, ptr, w);
yading@10:             ptr += stride;
yading@10:         }
yading@10:     } else if (depth == 16) {
yading@10:         bytestream2_skip(&gb, 4);
yading@10:         switch (d3d_format) {
yading@10:         case 0:
yading@10:             if (!(flags & 1))
yading@10:                 goto unsupported;
yading@10:         case FF_S3TC_DXT1:
yading@10:             if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 8)
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             ff_decode_dxt1(&gb, ptr, w, h, stride);
yading@10:             break;
yading@10:         case FF_S3TC_DXT3:
yading@10:             if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 16)
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             ff_decode_dxt3(&gb, ptr, w, h, stride);
yading@10:             break;
yading@10:         default:
yading@10:             goto unsupported;
yading@10:         }
yading@10:     } else if (depth == 32) {
yading@10:         switch (d3d_format) {
yading@10:         case 0x15:
yading@10:         case 0x16:
yading@10:             if (bytestream2_get_bytes_left(&gb) < h * w * 4)
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             for (y=0; y<h; y++) {
yading@10:                 bytestream2_get_buffer(&gb, ptr, w * 4);
yading@10:                 ptr += stride;
yading@10:             }
yading@10:             break;
yading@10:         default:
yading@10:             goto unsupported;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     *got_frame = 1;
yading@10: 
yading@10:     return avpkt->size;
yading@10: 
yading@10: unsupported:
yading@10:     av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
yading@10:     return AVERROR_PATCHWELCOME;
yading@10: }
yading@10: 
yading@10: AVCodec ff_txd_decoder = {
yading@10:     .name           = "txd",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_TXD,
yading@10:     .decode         = txd_decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
yading@10: };