/* * 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 Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/intreadwrite.h" #include "libavutil/imgutils.h" #include "avcodec.h" #include "bytestream.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, AVPacket *avpkt) { TXDContext * const s = avctx->priv_data; GetByteContext gb; AVFrame *picture = data; AVFrame * const p = &s->picture; unsigned int version, w, h, d3d_format, depth, stride, flags; unsigned int y, v; uint8_t *ptr; uint32_t *pal; bytestream2_init(&gb, avpkt->data, avpkt->size); version = bytestream2_get_le32(&gb); bytestream2_skip(&gb, 72); d3d_format = bytestream2_get_le32(&gb); w = bytestream2_get_le16(&gb); h = bytestream2_get_le16(&gb); depth = bytestream2_get_byte(&gb); bytestream2_skip(&gb, 2); flags = bytestream2_get_byte(&gb); 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; } 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 (av_image_check_size(w, h, 0, avctx)) 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 = AV_PICTURE_TYPE_I; ptr = p->data[0]; stride = p->linesize[0]; if (depth == 8) { pal = (uint32_t *) p->data[1]; for (y = 0; y < 256; y++) { v = bytestream2_get_be32(&gb); pal[y] = (v >> 8) + (v << 24); } bytestream2_skip(&gb, 4); for (y=0; y<h; y++) { bytestream2_get_buffer(&gb, ptr, w); ptr += stride; } } else if (depth == 16) { bytestream2_skip(&gb, 4); switch (d3d_format) { case 0: if (!(flags & 1)) goto unsupported; case FF_S3TC_DXT1: ff_decode_dxt1(&gb, ptr, w, h, stride); break; case FF_S3TC_DXT3: ff_decode_dxt3(&gb, 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++) { bytestream2_get_buffer(&gb, ptr, w * 4); ptr += stride; } break; default: goto unsupported; } } *picture = s->picture; *data_size = sizeof(AVPicture); return avpkt->size; 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 ff_txd_decoder = { .name = "txd", .type = AVMEDIA_TYPE_VIDEO, .id = CODEC_ID_TXD, .priv_data_size = sizeof(TXDContext), .init = txd_init, .close = txd_end, .decode = txd_decode_frame, .capabilities = CODEC_CAP_DR1, .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"), };