forked from KolibriOS/kolibrios
721 lines
26 KiB
C
721 lines
26 KiB
C
/*
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* DirectDraw Surface image decoder
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* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* DDS decoder
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*
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* https://msdn.microsoft.com/en-us/library/bb943982%28v=vs.85%29.aspx
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*/
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#include <stdint.h>
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "texturedsp.h"
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#include "thread.h"
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#define DDPF_FOURCC (1 << 2)
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#define DDPF_PALETTE (1 << 5)
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#define DDPF_NORMALMAP (1 << 31)
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enum DDSPostProc {
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DDS_NONE = 0,
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DDS_ALPHA_EXP,
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DDS_NORMAL_MAP,
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DDS_RAW_YCOCG,
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DDS_SWAP_ALPHA,
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DDS_SWIZZLE_A2XY,
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DDS_SWIZZLE_RBXG,
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DDS_SWIZZLE_RGXB,
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DDS_SWIZZLE_RXBG,
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DDS_SWIZZLE_RXGB,
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DDS_SWIZZLE_XGBR,
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DDS_SWIZZLE_XRBG,
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DDS_SWIZZLE_XGXR,
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};
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enum DDSDXGIFormat {
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DXGI_FORMAT_R16G16B16A16_TYPELESS = 9,
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DXGI_FORMAT_R16G16B16A16_FLOAT = 10,
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DXGI_FORMAT_R16G16B16A16_UNORM = 11,
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DXGI_FORMAT_R16G16B16A16_UINT = 12,
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DXGI_FORMAT_R16G16B16A16_SNORM = 13,
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DXGI_FORMAT_R16G16B16A16_SINT = 14,
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DXGI_FORMAT_R8G8B8A8_TYPELESS = 27,
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DXGI_FORMAT_R8G8B8A8_UNORM = 28,
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DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29,
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DXGI_FORMAT_R8G8B8A8_UINT = 30,
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DXGI_FORMAT_R8G8B8A8_SNORM = 31,
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DXGI_FORMAT_R8G8B8A8_SINT = 32,
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DXGI_FORMAT_BC1_TYPELESS = 70,
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DXGI_FORMAT_BC1_UNORM = 71,
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DXGI_FORMAT_BC1_UNORM_SRGB = 72,
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DXGI_FORMAT_BC2_TYPELESS = 73,
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DXGI_FORMAT_BC2_UNORM = 74,
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DXGI_FORMAT_BC2_UNORM_SRGB = 75,
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DXGI_FORMAT_BC3_TYPELESS = 76,
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DXGI_FORMAT_BC3_UNORM = 77,
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DXGI_FORMAT_BC3_UNORM_SRGB = 78,
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DXGI_FORMAT_BC4_TYPELESS = 79,
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DXGI_FORMAT_BC4_UNORM = 80,
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DXGI_FORMAT_BC4_SNORM = 81,
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DXGI_FORMAT_BC5_TYPELESS = 82,
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DXGI_FORMAT_BC5_UNORM = 83,
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DXGI_FORMAT_BC5_SNORM = 84,
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DXGI_FORMAT_B5G6R5_UNORM = 85,
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DXGI_FORMAT_B8G8R8A8_UNORM = 87,
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DXGI_FORMAT_B8G8R8X8_UNORM = 88,
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DXGI_FORMAT_B8G8R8A8_TYPELESS = 90,
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DXGI_FORMAT_B8G8R8A8_UNORM_SRGB = 91,
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DXGI_FORMAT_B8G8R8X8_TYPELESS = 92,
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DXGI_FORMAT_B8G8R8X8_UNORM_SRGB = 93,
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};
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typedef struct DDSContext {
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TextureDSPContext texdsp;
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GetByteContext gbc;
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int compressed;
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int paletted;
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enum DDSPostProc postproc;
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const uint8_t *tex_data; // Compressed texture
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int tex_ratio; // Compression ratio
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int slice_count; // Number of slices for threaded operations
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/* Pointer to the selected compress or decompress function. */
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int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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} DDSContext;
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static int parse_pixel_format(AVCodecContext *avctx)
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{
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DDSContext *ctx = avctx->priv_data;
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GetByteContext *gbc = &ctx->gbc;
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char buf[32];
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uint32_t flags, fourcc, gimp_tag;
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enum DDSDXGIFormat dxgi;
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int size, bpp, r, g, b, a;
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int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array;
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/* Alternative DDS implementations use reserved1 as custom header. */
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bytestream2_skip(gbc, 4 * 3);
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gimp_tag = bytestream2_get_le32(gbc);
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alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P');
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ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1');
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ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2');
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bytestream2_skip(gbc, 4 * 7);
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/* Now the real DDPF starts. */
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size = bytestream2_get_le32(gbc);
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if (size != 32) {
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av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size);
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return AVERROR_INVALIDDATA;
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}
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flags = bytestream2_get_le32(gbc);
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ctx->compressed = flags & DDPF_FOURCC;
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ctx->paletted = flags & DDPF_PALETTE;
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normal_map = flags & DDPF_NORMALMAP;
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fourcc = bytestream2_get_le32(gbc);
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if (ctx->compressed && ctx->paletted) {
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av_log(avctx, AV_LOG_WARNING,
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"Disabling invalid palette flag for compressed dds.\n");
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ctx->paletted = 0;
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}
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bpp = bytestream2_get_le32(gbc); // rgbbitcount
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r = bytestream2_get_le32(gbc); // rbitmask
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g = bytestream2_get_le32(gbc); // gbitmask
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b = bytestream2_get_le32(gbc); // bbitmask
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a = bytestream2_get_le32(gbc); // abitmask
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bytestream2_skip(gbc, 4); // caps
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bytestream2_skip(gbc, 4); // caps2
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bytestream2_skip(gbc, 4); // caps3
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bytestream2_skip(gbc, 4); // caps4
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bytestream2_skip(gbc, 4); // reserved2
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av_get_codec_tag_string(buf, sizeof(buf), fourcc);
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av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d "
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"r 0x%x g 0x%x b 0x%x a 0x%x\n", buf, bpp, r, g, b, a);
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if (gimp_tag) {
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av_get_codec_tag_string(buf, sizeof(buf), gimp_tag);
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av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", buf);
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}
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if (ctx->compressed)
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avctx->pix_fmt = AV_PIX_FMT_RGBA;
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if (ctx->compressed) {
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switch (fourcc) {
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case MKTAG('D', 'X', 'T', '1'):
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ctx->tex_ratio = 8;
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ctx->tex_funct = ctx->texdsp.dxt1a_block;
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break;
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case MKTAG('D', 'X', 'T', '2'):
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxt2_block;
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break;
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case MKTAG('D', 'X', 'T', '3'):
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxt3_block;
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break;
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case MKTAG('D', 'X', 'T', '4'):
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxt4_block;
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break;
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case MKTAG('D', 'X', 'T', '5'):
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ctx->tex_ratio = 16;
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if (ycocg_scaled)
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ctx->tex_funct = ctx->texdsp.dxt5ys_block;
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else if (ycocg_classic)
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ctx->tex_funct = ctx->texdsp.dxt5y_block;
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else
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ctx->tex_funct = ctx->texdsp.dxt5_block;
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break;
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case MKTAG('R', 'X', 'G', 'B'):
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxt5_block;
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/* This format may be considered as a normal map,
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* but it is handled differently in a separate postproc. */
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ctx->postproc = DDS_SWIZZLE_RXGB;
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normal_map = 0;
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break;
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case MKTAG('A', 'T', 'I', '1'):
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case MKTAG('B', 'C', '4', 'U'):
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ctx->tex_ratio = 8;
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ctx->tex_funct = ctx->texdsp.rgtc1u_block;
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break;
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case MKTAG('B', 'C', '4', 'S'):
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ctx->tex_ratio = 8;
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ctx->tex_funct = ctx->texdsp.rgtc1s_block;
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break;
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case MKTAG('A', 'T', 'I', '2'):
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/* RGT2 variant with swapped R and G (3Dc)*/
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxn3dc_block;
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break;
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case MKTAG('B', 'C', '5', 'U'):
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.rgtc2u_block;
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break;
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case MKTAG('B', 'C', '5', 'S'):
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.rgtc2s_block;
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break;
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case MKTAG('U', 'Y', 'V', 'Y'):
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ctx->compressed = 0;
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avctx->pix_fmt = AV_PIX_FMT_UYVY422;
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break;
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case MKTAG('Y', 'U', 'Y', '2'):
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ctx->compressed = 0;
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avctx->pix_fmt = AV_PIX_FMT_YUYV422;
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break;
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case MKTAG('P', '8', ' ', ' '):
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/* ATI Palette8, same as normal palette */
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ctx->compressed = 0;
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ctx->paletted = 1;
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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break;
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case MKTAG('D', 'X', '1', '0'):
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/* DirectX 10 extra header */
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dxgi = bytestream2_get_le32(gbc);
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bytestream2_skip(gbc, 4); // resourceDimension
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bytestream2_skip(gbc, 4); // miscFlag
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array = bytestream2_get_le32(gbc);
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bytestream2_skip(gbc, 4); // miscFlag2
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if (array != 0)
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av_log(avctx, AV_LOG_VERBOSE,
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"Found array of size %d (ignored).\n", array);
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/* Only BC[1-5] are actually compressed. */
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ctx->compressed = (dxgi >= 70) && (dxgi <= 84);
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av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi);
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switch (dxgi) {
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/* RGB types. */
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case DXGI_FORMAT_R16G16B16A16_TYPELESS:
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case DXGI_FORMAT_R16G16B16A16_FLOAT:
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case DXGI_FORMAT_R16G16B16A16_UNORM:
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case DXGI_FORMAT_R16G16B16A16_UINT:
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case DXGI_FORMAT_R16G16B16A16_SNORM:
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case DXGI_FORMAT_R16G16B16A16_SINT:
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avctx->pix_fmt = AV_PIX_FMT_BGRA64;
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break;
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case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
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avctx->colorspace = AVCOL_SPC_RGB;
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case DXGI_FORMAT_R8G8B8A8_TYPELESS:
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case DXGI_FORMAT_R8G8B8A8_UNORM:
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case DXGI_FORMAT_R8G8B8A8_UINT:
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case DXGI_FORMAT_R8G8B8A8_SNORM:
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case DXGI_FORMAT_R8G8B8A8_SINT:
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avctx->pix_fmt = AV_PIX_FMT_BGRA;
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break;
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case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
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avctx->colorspace = AVCOL_SPC_RGB;
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case DXGI_FORMAT_B8G8R8A8_TYPELESS:
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case DXGI_FORMAT_B8G8R8A8_UNORM:
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avctx->pix_fmt = AV_PIX_FMT_RGBA;
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break;
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case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
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avctx->colorspace = AVCOL_SPC_RGB;
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case DXGI_FORMAT_B8G8R8X8_TYPELESS:
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case DXGI_FORMAT_B8G8R8X8_UNORM:
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avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
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break;
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case DXGI_FORMAT_B5G6R5_UNORM:
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avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
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break;
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/* Texture types. */
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case DXGI_FORMAT_BC1_UNORM_SRGB:
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avctx->colorspace = AVCOL_SPC_RGB;
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case DXGI_FORMAT_BC1_TYPELESS:
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case DXGI_FORMAT_BC1_UNORM:
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ctx->tex_ratio = 8;
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ctx->tex_funct = ctx->texdsp.dxt1a_block;
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break;
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case DXGI_FORMAT_BC2_UNORM_SRGB:
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avctx->colorspace = AVCOL_SPC_RGB;
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case DXGI_FORMAT_BC2_TYPELESS:
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case DXGI_FORMAT_BC2_UNORM:
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxt3_block;
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break;
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case DXGI_FORMAT_BC3_UNORM_SRGB:
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avctx->colorspace = AVCOL_SPC_RGB;
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case DXGI_FORMAT_BC3_TYPELESS:
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case DXGI_FORMAT_BC3_UNORM:
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.dxt5_block;
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break;
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case DXGI_FORMAT_BC4_TYPELESS:
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case DXGI_FORMAT_BC4_UNORM:
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ctx->tex_ratio = 8;
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ctx->tex_funct = ctx->texdsp.rgtc1u_block;
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break;
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case DXGI_FORMAT_BC4_SNORM:
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ctx->tex_ratio = 8;
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ctx->tex_funct = ctx->texdsp.rgtc1s_block;
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break;
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case DXGI_FORMAT_BC5_TYPELESS:
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case DXGI_FORMAT_BC5_UNORM:
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.rgtc2u_block;
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break;
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case DXGI_FORMAT_BC5_SNORM:
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ctx->tex_ratio = 16;
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ctx->tex_funct = ctx->texdsp.rgtc2s_block;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR,
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"Unsupported DXGI format %d.\n", dxgi);
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return AVERROR_INVALIDDATA;
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}
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", buf);
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return AVERROR_INVALIDDATA;
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}
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} else if (ctx->paletted) {
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if (bpp == 8) {
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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} else {
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av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp);
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return AVERROR_INVALIDDATA;
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}
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} else {
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/* 8 bpp */
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if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0)
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avctx->pix_fmt = AV_PIX_FMT_GRAY8;
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/* 16 bpp */
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else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00)
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avctx->pix_fmt = AV_PIX_FMT_YA8;
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else if (bpp == 16 && r == 0xffff && g == 0 && b == 0 && a == 0)
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avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
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else if (bpp == 16 && r == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0)
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avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
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/* 24 bpp */
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else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
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avctx->pix_fmt = AV_PIX_FMT_BGR24;
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/* 32 bpp */
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else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
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avctx->pix_fmt = AV_PIX_FMT_BGR0; // opaque
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else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0)
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avctx->pix_fmt = AV_PIX_FMT_RGB0; // opaque
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else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000)
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avctx->pix_fmt = AV_PIX_FMT_BGRA;
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else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000)
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avctx->pix_fmt = AV_PIX_FMT_RGBA;
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/* give up */
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else {
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av_log(avctx, AV_LOG_ERROR, "Unknown pixel format "
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"[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a);
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return AVERROR_INVALIDDATA;
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}
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}
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/* Set any remaining post-proc that should happen before frame is ready. */
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if (alpha_exponent)
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ctx->postproc = DDS_ALPHA_EXP;
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else if (normal_map)
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ctx->postproc = DDS_NORMAL_MAP;
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else if (ycocg_classic && !ctx->compressed)
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ctx->postproc = DDS_RAW_YCOCG;
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else if (avctx->pix_fmt == AV_PIX_FMT_YA8)
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ctx->postproc = DDS_SWAP_ALPHA;
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/* ATI/NVidia variants sometimes add swizzling in bpp. */
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switch (bpp) {
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case MKTAG('A', '2', 'X', 'Y'):
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ctx->postproc = DDS_SWIZZLE_A2XY;
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break;
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case MKTAG('x', 'G', 'B', 'R'):
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ctx->postproc = DDS_SWIZZLE_XGBR;
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break;
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case MKTAG('x', 'R', 'B', 'G'):
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ctx->postproc = DDS_SWIZZLE_XRBG;
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break;
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case MKTAG('R', 'B', 'x', 'G'):
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ctx->postproc = DDS_SWIZZLE_RBXG;
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break;
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case MKTAG('R', 'G', 'x', 'B'):
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ctx->postproc = DDS_SWIZZLE_RGXB;
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break;
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case MKTAG('R', 'x', 'B', 'G'):
|
|
ctx->postproc = DDS_SWIZZLE_RXBG;
|
|
break;
|
|
case MKTAG('x', 'G', 'x', 'R'):
|
|
ctx->postproc = DDS_SWIZZLE_XGXR;
|
|
break;
|
|
case MKTAG('A', '2', 'D', '5'):
|
|
ctx->postproc = DDS_NORMAL_MAP;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
|
|
int slice, int thread_nb)
|
|
{
|
|
DDSContext *ctx = avctx->priv_data;
|
|
AVFrame *frame = arg;
|
|
const uint8_t *d = ctx->tex_data;
|
|
int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
|
|
int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
|
|
int x, y;
|
|
int start_slice, end_slice;
|
|
int base_blocks_per_slice = h_block / ctx->slice_count;
|
|
int remainder_blocks = h_block % ctx->slice_count;
|
|
|
|
/* When the frame height (in blocks) doesn't divide evenly between the
|
|
* number of slices, spread the remaining blocks evenly between the first
|
|
* operations */
|
|
start_slice = slice * base_blocks_per_slice;
|
|
/* Add any extra blocks (one per slice) that have been added before this slice */
|
|
start_slice += FFMIN(slice, remainder_blocks);
|
|
|
|
end_slice = start_slice + base_blocks_per_slice;
|
|
/* Add an extra block if there are still remainder blocks to be accounted for */
|
|
if (slice < remainder_blocks)
|
|
end_slice++;
|
|
|
|
for (y = start_slice; y < end_slice; y++) {
|
|
uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
|
|
int off = y * w_block;
|
|
for (x = 0; x < w_block; x++) {
|
|
ctx->tex_funct(p + x * 16, frame->linesize[0],
|
|
d + (off + x) * ctx->tex_ratio);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void do_swizzle(AVFrame *frame, int x, int y)
|
|
{
|
|
int i;
|
|
for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
|
|
uint8_t *src = frame->data[0] + i;
|
|
FFSWAP(uint8_t, src[x], src[y]);
|
|
}
|
|
}
|
|
|
|
static void run_postproc(AVCodecContext *avctx, AVFrame *frame)
|
|
{
|
|
DDSContext *ctx = avctx->priv_data;
|
|
int i, x_off;
|
|
|
|
switch (ctx->postproc) {
|
|
case DDS_ALPHA_EXP:
|
|
/* Alpha-exponential mode divides each channel by the maximum
|
|
* R, G or B value, and stores the multiplying factor in the
|
|
* alpha channel. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing alpha exponent.\n");
|
|
|
|
for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
|
|
uint8_t *src = frame->data[0] + i;
|
|
int r = src[0];
|
|
int g = src[1];
|
|
int b = src[2];
|
|
int a = src[3];
|
|
|
|
src[0] = r * a / 255;
|
|
src[1] = g * a / 255;
|
|
src[2] = b * a / 255;
|
|
src[3] = 255;
|
|
}
|
|
break;
|
|
case DDS_NORMAL_MAP:
|
|
/* Normal maps work in the XYZ color space and they encode
|
|
* X in R or in A, depending on the texture type, Y in G and
|
|
* derive Z with a square root of the distance.
|
|
*
|
|
* http://www.realtimecollisiondetection.net/blog/?p=28 */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing normal map.\n");
|
|
|
|
x_off = ctx->tex_ratio == 8 ? 0 : 3;
|
|
for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
|
|
uint8_t *src = frame->data[0] + i;
|
|
int x = src[x_off];
|
|
int y = src[1];
|
|
int z = 127;
|
|
|
|
int d = (255 * 255 - x * x - y * y) / 2;
|
|
if (d > 0)
|
|
z = rint(sqrtf(d));
|
|
|
|
src[0] = x;
|
|
src[1] = y;
|
|
src[2] = z;
|
|
src[3] = 255;
|
|
}
|
|
break;
|
|
case DDS_RAW_YCOCG:
|
|
/* Data is Y-Co-Cg-A and not RGBA, but they are represented
|
|
* with the same masks in the DDPF header. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing raw YCoCg.\n");
|
|
|
|
for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
|
|
uint8_t *src = frame->data[0] + i;
|
|
int a = src[0];
|
|
int cg = src[1] - 128;
|
|
int co = src[2] - 128;
|
|
int y = src[3];
|
|
|
|
src[0] = av_clip_uint8(y + co - cg);
|
|
src[1] = av_clip_uint8(y + cg);
|
|
src[2] = av_clip_uint8(y - co - cg);
|
|
src[3] = a;
|
|
}
|
|
break;
|
|
case DDS_SWAP_ALPHA:
|
|
/* Alpha and Luma are stored swapped. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing swapped Luma/Alpha.\n");
|
|
|
|
for (i = 0; i < frame->linesize[0] * frame->height; i += 2) {
|
|
uint8_t *src = frame->data[0] + i;
|
|
FFSWAP(uint8_t, src[0], src[1]);
|
|
}
|
|
break;
|
|
case DDS_SWIZZLE_A2XY:
|
|
/* Swap R and G, often used to restore a standard RGTC2. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing A2XY swizzle.\n");
|
|
do_swizzle(frame, 0, 1);
|
|
break;
|
|
case DDS_SWIZZLE_RBXG:
|
|
/* Swap G and A, then B and new A (G). */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing RBXG swizzle.\n");
|
|
do_swizzle(frame, 1, 3);
|
|
do_swizzle(frame, 2, 3);
|
|
break;
|
|
case DDS_SWIZZLE_RGXB:
|
|
/* Swap B and A. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing RGXB swizzle.\n");
|
|
do_swizzle(frame, 2, 3);
|
|
break;
|
|
case DDS_SWIZZLE_RXBG:
|
|
/* Swap G and A. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing RXBG swizzle.\n");
|
|
do_swizzle(frame, 1, 3);
|
|
break;
|
|
case DDS_SWIZZLE_RXGB:
|
|
/* Swap R and A (misleading name). */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing RXGB swizzle.\n");
|
|
do_swizzle(frame, 0, 3);
|
|
break;
|
|
case DDS_SWIZZLE_XGBR:
|
|
/* Swap B and A, then R and new A (B). */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing XGBR swizzle.\n");
|
|
do_swizzle(frame, 2, 3);
|
|
do_swizzle(frame, 0, 3);
|
|
break;
|
|
case DDS_SWIZZLE_XGXR:
|
|
/* Swap G and A, then R and new A (G), then new R (G) and new G (A).
|
|
* This variant does not store any B component. */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing XGXR swizzle.\n");
|
|
do_swizzle(frame, 1, 3);
|
|
do_swizzle(frame, 0, 3);
|
|
do_swizzle(frame, 0, 1);
|
|
break;
|
|
case DDS_SWIZZLE_XRBG:
|
|
/* Swap G and A, then R and new A (G). */
|
|
av_log(avctx, AV_LOG_DEBUG, "Post-processing XRBG swizzle.\n");
|
|
do_swizzle(frame, 1, 3);
|
|
do_swizzle(frame, 0, 3);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int dds_decode(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
DDSContext *ctx = avctx->priv_data;
|
|
GetByteContext *gbc = &ctx->gbc;
|
|
AVFrame *frame = data;
|
|
int mipmap;
|
|
int ret;
|
|
|
|
ff_texturedsp_init(&ctx->texdsp);
|
|
bytestream2_init(gbc, avpkt->data, avpkt->size);
|
|
|
|
if (bytestream2_get_bytes_left(gbc) < 128) {
|
|
av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).",
|
|
bytestream2_get_bytes_left(gbc));
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (bytestream2_get_le32(gbc) != MKTAG('D', 'D', 'S', ' ') ||
|
|
bytestream2_get_le32(gbc) != 124) { // header size
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid DDS header.");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
bytestream2_skip(gbc, 4); // flags
|
|
|
|
avctx->height = bytestream2_get_le32(gbc);
|
|
avctx->width = bytestream2_get_le32(gbc);
|
|
ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
|
|
if (ret < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
|
|
avctx->width, avctx->height);
|
|
return ret;
|
|
}
|
|
|
|
/* Since codec is based on 4x4 blocks, size is aligned to 4. */
|
|
avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
|
|
avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
|
|
|
|
bytestream2_skip(gbc, 4); // pitch
|
|
bytestream2_skip(gbc, 4); // depth
|
|
mipmap = bytestream2_get_le32(gbc);
|
|
if (mipmap != 0)
|
|
av_log(avctx, AV_LOG_VERBOSE, "Found %d mipmaps (ignored).\n", mipmap);
|
|
|
|
/* Extract pixel format information, considering additional elements
|
|
* in reserved1 and reserved2. */
|
|
ret = parse_pixel_format(avctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = ff_get_buffer(avctx, frame, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ctx->compressed) {
|
|
int size = (avctx->coded_height / TEXTURE_BLOCK_H) *
|
|
(avctx->coded_width / TEXTURE_BLOCK_W) * ctx->tex_ratio;
|
|
ctx->slice_count = av_clip(avctx->thread_count, 1,
|
|
avctx->coded_height / TEXTURE_BLOCK_H);
|
|
|
|
if (bytestream2_get_bytes_left(gbc) < size) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Compressed Buffer is too small (%d < %d).\n",
|
|
bytestream2_get_bytes_left(gbc), size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* Use the decompress function on the texture, one block per thread. */
|
|
ctx->tex_data = gbc->buffer;
|
|
avctx->execute2(avctx, decompress_texture_thread, frame, NULL, ctx->slice_count);
|
|
} else {
|
|
int linesize = av_image_get_linesize(avctx->pix_fmt, frame->width, 0);
|
|
|
|
if (ctx->paletted) {
|
|
int i;
|
|
/* Use the first 1024 bytes as palette, then copy the rest. */
|
|
bytestream2_get_buffer(gbc, frame->data[1], 256 * 4);
|
|
for (i = 0; i < 256; i++)
|
|
AV_WN32(frame->data[1] + i*4,
|
|
(frame->data[1][2+i*4]<<0)+
|
|
(frame->data[1][1+i*4]<<8)+
|
|
(frame->data[1][0+i*4]<<16)+
|
|
(frame->data[1][3+i*4]<<24)
|
|
);
|
|
|
|
frame->palette_has_changed = 1;
|
|
}
|
|
|
|
if (bytestream2_get_bytes_left(gbc) < frame->height * linesize) {
|
|
av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
|
|
bytestream2_get_bytes_left(gbc), frame->height * linesize);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
av_image_copy_plane(frame->data[0], frame->linesize[0],
|
|
gbc->buffer, linesize,
|
|
linesize, frame->height);
|
|
}
|
|
|
|
/* Run any post processing here if needed. */
|
|
if (avctx->pix_fmt == AV_PIX_FMT_BGRA ||
|
|
avctx->pix_fmt == AV_PIX_FMT_RGBA ||
|
|
avctx->pix_fmt == AV_PIX_FMT_RGB0 ||
|
|
avctx->pix_fmt == AV_PIX_FMT_BGR0 ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YA8)
|
|
run_postproc(avctx, frame);
|
|
|
|
/* Frame is ready to be output. */
|
|
frame->pict_type = AV_PICTURE_TYPE_I;
|
|
frame->key_frame = 1;
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
AVCodec ff_dds_decoder = {
|
|
.name = "dds",
|
|
.long_name = NULL_IF_CONFIG_SMALL("DirectDraw Surface image decoder"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_DDS,
|
|
.decode = dds_decode,
|
|
.priv_data_size = sizeof(DDSContext),
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE
|
|
};
|