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/*
* 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 "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) {
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = avpkt->data + avpkt->size;
TXDContext * const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame * const p = &s->picture;
unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags;
unsigned int y, v;
uint8_t *ptr;
const uint8_t *cur = buf;
const uint32_t *palette = (const uint32_t *)(cur + 88);
uint32_t *pal;
if (buf_end - cur < 92)
return AVERROR_INVALIDDATA;
version = AV_RL32(cur);
d3d_format = AV_RL32(cur+76);
w = AV_RL16(cur+80);
h = AV_RL16(cur+82);
depth = AV_RL8 (cur+84);
mipmap_count = AV_RL8 (cur+85);
flags = AV_RL8 (cur+87);
cur += 92;
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;
if (buf_end - cur < 1024)
return AVERROR_INVALIDDATA;
cur += 1024;
} 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 = AV_RB32(palette+y);
pal[y] = (v>>8) + (v<<24);
}
if (buf_end - cur < w * h)
return AVERROR_INVALIDDATA;
for (y=0; y<h; y++) {
memcpy(ptr, cur, w);
ptr += stride;
cur += w;
}
} else if (depth == 16) {
switch (d3d_format) {
case 0:
if (!flags&1) goto unsupported;
case FF_S3TC_DXT1:
if (buf_end - cur < (w/4) * (h/4) * 8)
return AVERROR_INVALIDDATA;
ff_decode_dxt1(cur, ptr, w, h, stride);
break;
case FF_S3TC_DXT3:
if (buf_end - cur < (w/4) * (h/4) * 16)
return AVERROR_INVALIDDATA;
ff_decode_dxt3(cur, ptr, w, h, stride);
break;
default:
goto unsupported;
}
} else if (depth == 32) {
switch (d3d_format) {
case 0x15:
case 0x16:
if (buf_end - cur < h * w * 4)
return AVERROR_INVALIDDATA;
for (y=0; y<h; y++) {
memcpy(ptr, cur, w*4);
ptr += stride;
cur += w*4;
}
break;
default:
goto unsupported;
}
}
for (; mipmap_count > 1 && buf_end - cur >= 4; mipmap_count--) {
uint32_t length = bytestream_get_le32(&cur);
if (buf_end - cur < length)
break;
cur += length;
}
*picture = s->picture;
*data_size = sizeof(AVPicture);
return cur - buf;
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 = {
"txd",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_TXD,
sizeof(TXDContext),
txd_init,
NULL,
txd_end,
txd_decode_frame,
CODEC_CAP_DR1,
NULL,
.long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
};
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