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FFmpeg/libavcodec/txd.c
Andreas Rheinhardt 20f9727018 avcodec/codec_internal: Add FFCodec, hide internal part of AVCodec
Up until now, codec.h contains both public and private parts
of AVCodec. This exposes the internals of AVCodec to users
and leads them into the temptation of actually using them
and forces us to forward-declare structures and types that
users can't use at all.

This commit changes this by adding a new structure FFCodec to
codec_internal.h that extends AVCodec, i.e. contains the public
AVCodec as first member; the private fields of AVCodec are moved
to this structure, leaving codec.h clean.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-03-21 01:33:09 +01:00

175 lines
5.4 KiB
C

/*
* 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 "codec_internal.h"
#include "internal.h"
#include "texturedsp.h"
#define TXD_DXT1 0x31545844
#define TXD_DXT3 0x33545844
static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt) {
GetByteContext gb;
TextureDSPContext dxtc;
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 i, j;
int ret;
if (avpkt->size < 88)
return AVERROR_INVALIDDATA;
ff_texturedsp_init(&dxtc);
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) {
avpriv_report_missing_feature(avctx, "Texture data version %u", version);
return AVERROR_PATCHWELCOME;
}
if (depth == 8) {
avctx->pix_fmt = AV_PIX_FMT_PAL8;
if (bytestream2_get_bytes_left(&gb) < w * h + 4 * 256)
return AVERROR_INVALIDDATA;
} else if (depth == 16) {
avctx->pix_fmt = AV_PIX_FMT_RGBA;
switch (d3d_format) {
case 0:
if (!(flags & 1))
goto unsupported;
case TXD_DXT1:
if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8 + 4)
return AVERROR_INVALIDDATA;
break;
case TXD_DXT3:
if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16 + 4)
return AVERROR_INVALIDDATA;
}
} else if (depth == 32) {
avctx->pix_fmt = AV_PIX_FMT_RGBA;
if (bytestream2_get_bytes_left(&gb) < h * w * 4)
return AVERROR_INVALIDDATA;
} else {
avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
return AVERROR_PATCHWELCOME;
}
if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
return ret;
avctx->coded_width = FFALIGN(w, 4);
avctx->coded_height = FFALIGN(h, 4);
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);
}
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:
case TXD_DXT1:
for (j = 0; j < avctx->height; j += 4) {
for (i = 0; i < avctx->width; i += 4) {
uint8_t *p = ptr + i * 4 + j * stride;
int step = dxtc.dxt1_block(p, stride, gb.buffer);
bytestream2_skip(&gb, step);
}
}
break;
case TXD_DXT3:
for (j = 0; j < avctx->height; j += 4) {
for (i = 0; i < avctx->width; i += 4) {
uint8_t *p = ptr + i * 4 + j * stride;
int step = dxtc.dxt3_block(p, stride, gb.buffer);
bytestream2_skip(&gb, step);
}
}
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;
}
}
*got_frame = 1;
return avpkt->size;
unsupported:
avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
return AVERROR_PATCHWELCOME;
}
const FFCodec ff_txd_decoder = {
.p.name = "txd",
.p.long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_TXD,
.p.capabilities = AV_CODEC_CAP_DR1,
.decode = txd_decode_frame,
};