diff options
Diffstat (limited to 'ffmpeg1/libavcodec/txd.c')
| -rw-r--r-- | ffmpeg1/libavcodec/txd.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/txd.c b/ffmpeg1/libavcodec/txd.c new file mode 100644 index 0000000..e8d483f --- /dev/null +++ b/ffmpeg1/libavcodec/txd.c @@ -0,0 +1,142 @@ +/* + * 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 "libavutil/imgutils.h" +#include "bytestream.h" +#include "avcodec.h" +#include "internal.h" +#include "s3tc.h" + +static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) { + GetByteContext gb; + AVFrame * const p = data; + unsigned int version, w, h, d3d_format, depth, stride, flags; + unsigned int y, v; + uint8_t *ptr; + uint32_t *pal; + int ret; + + 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 AVERROR_PATCHWELCOME; + } + + if (depth == 8) { + avctx->pix_fmt = AV_PIX_FMT_PAL8; + } else if (depth == 16 || depth == 32) { + avctx->pix_fmt = AV_PIX_FMT_RGB32; + } else { + av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth); + return AVERROR_PATCHWELCOME; + } + + if ((ret = av_image_check_size(w, h, 0, avctx)) < 0) + return ret; + if (w != avctx->width || h != avctx->height) + avcodec_set_dimensions(avctx, w, h); + if ((ret = ff_get_buffer(avctx, p, 0)) < 0) + return ret; + + 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); + } + if (bytestream2_get_bytes_left(&gb) < w * h) + return AVERROR_INVALIDDATA; + 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: + if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 8) + return AVERROR_INVALIDDATA; + ff_decode_dxt1(&gb, ptr, w, h, stride); + break; + case FF_S3TC_DXT3: + if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 16) + return AVERROR_INVALIDDATA; + ff_decode_dxt3(&gb, ptr, w, h, stride); + break; + default: + goto unsupported; + } + } else if (depth == 32) { + switch (d3d_format) { + case 0x15: + case 0x16: + if (bytestream2_get_bytes_left(&gb) < h * w * 4) + return AVERROR_INVALIDDATA; + for (y=0; y<h; y++) { + bytestream2_get_buffer(&gb, ptr, w * 4); + ptr += stride; + } + break; + default: + goto unsupported; + } + } + + *got_frame = 1; + + return avpkt->size; + +unsupported: + av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format); + return AVERROR_PATCHWELCOME; +} + +AVCodec ff_txd_decoder = { + .name = "txd", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_TXD, + .decode = txd_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"), +}; |