| /* |
| * DirectDraw Surface image decoder |
| * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com> |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * DDS decoder |
| * |
| * https://msdn.microsoft.com/en-us/library/bb943982%28v=vs.85%29.aspx |
| */ |
| |
| #include <stdint.h> |
| |
| #include "libavutil/libm.h" |
| #include "libavutil/imgutils.h" |
| |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "internal.h" |
| #include "texturedsp.h" |
| #include "thread.h" |
| |
| #define DDPF_FOURCC (1 << 2) |
| #define DDPF_PALETTE (1 << 5) |
| #define DDPF_NORMALMAP (1U << 31) |
| |
| enum DDSPostProc { |
| DDS_NONE = 0, |
| DDS_ALPHA_EXP, |
| DDS_NORMAL_MAP, |
| DDS_RAW_YCOCG, |
| DDS_SWAP_ALPHA, |
| DDS_SWIZZLE_A2XY, |
| DDS_SWIZZLE_RBXG, |
| DDS_SWIZZLE_RGXB, |
| DDS_SWIZZLE_RXBG, |
| DDS_SWIZZLE_RXGB, |
| DDS_SWIZZLE_XGBR, |
| DDS_SWIZZLE_XRBG, |
| DDS_SWIZZLE_XGXR, |
| }; |
| |
| enum DDSDXGIFormat { |
| DXGI_FORMAT_R16G16B16A16_TYPELESS = 9, |
| DXGI_FORMAT_R16G16B16A16_FLOAT = 10, |
| DXGI_FORMAT_R16G16B16A16_UNORM = 11, |
| DXGI_FORMAT_R16G16B16A16_UINT = 12, |
| DXGI_FORMAT_R16G16B16A16_SNORM = 13, |
| DXGI_FORMAT_R16G16B16A16_SINT = 14, |
| |
| DXGI_FORMAT_R8G8B8A8_TYPELESS = 27, |
| DXGI_FORMAT_R8G8B8A8_UNORM = 28, |
| DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29, |
| DXGI_FORMAT_R8G8B8A8_UINT = 30, |
| DXGI_FORMAT_R8G8B8A8_SNORM = 31, |
| DXGI_FORMAT_R8G8B8A8_SINT = 32, |
| |
| DXGI_FORMAT_BC1_TYPELESS = 70, |
| DXGI_FORMAT_BC1_UNORM = 71, |
| DXGI_FORMAT_BC1_UNORM_SRGB = 72, |
| DXGI_FORMAT_BC2_TYPELESS = 73, |
| DXGI_FORMAT_BC2_UNORM = 74, |
| DXGI_FORMAT_BC2_UNORM_SRGB = 75, |
| DXGI_FORMAT_BC3_TYPELESS = 76, |
| DXGI_FORMAT_BC3_UNORM = 77, |
| DXGI_FORMAT_BC3_UNORM_SRGB = 78, |
| DXGI_FORMAT_BC4_TYPELESS = 79, |
| DXGI_FORMAT_BC4_UNORM = 80, |
| DXGI_FORMAT_BC4_SNORM = 81, |
| DXGI_FORMAT_BC5_TYPELESS = 82, |
| DXGI_FORMAT_BC5_UNORM = 83, |
| DXGI_FORMAT_BC5_SNORM = 84, |
| DXGI_FORMAT_B5G6R5_UNORM = 85, |
| DXGI_FORMAT_B8G8R8A8_UNORM = 87, |
| DXGI_FORMAT_B8G8R8X8_UNORM = 88, |
| DXGI_FORMAT_B8G8R8A8_TYPELESS = 90, |
| DXGI_FORMAT_B8G8R8A8_UNORM_SRGB = 91, |
| DXGI_FORMAT_B8G8R8X8_TYPELESS = 92, |
| DXGI_FORMAT_B8G8R8X8_UNORM_SRGB = 93, |
| }; |
| |
| typedef struct DDSContext { |
| TextureDSPContext texdsp; |
| GetByteContext gbc; |
| |
| int compressed; |
| int paletted; |
| int bpp; |
| enum DDSPostProc postproc; |
| |
| const uint8_t *tex_data; // Compressed texture |
| int tex_ratio; // Compression ratio |
| int slice_count; // Number of slices for threaded operations |
| |
| /* Pointer to the selected compress or decompress function. */ |
| int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); |
| } DDSContext; |
| |
| static int parse_pixel_format(AVCodecContext *avctx) |
| { |
| DDSContext *ctx = avctx->priv_data; |
| GetByteContext *gbc = &ctx->gbc; |
| uint32_t flags, fourcc, gimp_tag; |
| enum DDSDXGIFormat dxgi; |
| int size, bpp, r, g, b, a; |
| int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array; |
| |
| /* Alternative DDS implementations use reserved1 as custom header. */ |
| bytestream2_skip(gbc, 4 * 3); |
| gimp_tag = bytestream2_get_le32(gbc); |
| alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P'); |
| ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1'); |
| ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2'); |
| bytestream2_skip(gbc, 4 * 7); |
| |
| /* Now the real DDPF starts. */ |
| size = bytestream2_get_le32(gbc); |
| if (size != 32) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size); |
| return AVERROR_INVALIDDATA; |
| } |
| flags = bytestream2_get_le32(gbc); |
| ctx->compressed = flags & DDPF_FOURCC; |
| ctx->paletted = flags & DDPF_PALETTE; |
| normal_map = flags & DDPF_NORMALMAP; |
| fourcc = bytestream2_get_le32(gbc); |
| |
| if (ctx->compressed && ctx->paletted) { |
| av_log(avctx, AV_LOG_WARNING, |
| "Disabling invalid palette flag for compressed dds.\n"); |
| ctx->paletted = 0; |
| } |
| |
| bpp = ctx->bpp = bytestream2_get_le32(gbc); // rgbbitcount |
| r = bytestream2_get_le32(gbc); // rbitmask |
| g = bytestream2_get_le32(gbc); // gbitmask |
| b = bytestream2_get_le32(gbc); // bbitmask |
| a = bytestream2_get_le32(gbc); // abitmask |
| |
| bytestream2_skip(gbc, 4); // caps |
| bytestream2_skip(gbc, 4); // caps2 |
| bytestream2_skip(gbc, 4); // caps3 |
| bytestream2_skip(gbc, 4); // caps4 |
| bytestream2_skip(gbc, 4); // reserved2 |
| |
| av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d " |
| "r 0x%x g 0x%x b 0x%x a 0x%x\n", av_fourcc2str(fourcc), bpp, r, g, b, a); |
| if (gimp_tag) |
| av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", av_fourcc2str(gimp_tag)); |
| |
| if (ctx->compressed) |
| avctx->pix_fmt = AV_PIX_FMT_RGBA; |
| |
| if (ctx->compressed) { |
| switch (fourcc) { |
| case MKTAG('D', 'X', 'T', '1'): |
| ctx->tex_ratio = 8; |
| ctx->tex_funct = ctx->texdsp.dxt1a_block; |
| break; |
| case MKTAG('D', 'X', 'T', '2'): |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxt2_block; |
| break; |
| case MKTAG('D', 'X', 'T', '3'): |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxt3_block; |
| break; |
| case MKTAG('D', 'X', 'T', '4'): |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxt4_block; |
| break; |
| case MKTAG('D', 'X', 'T', '5'): |
| ctx->tex_ratio = 16; |
| if (ycocg_scaled) |
| ctx->tex_funct = ctx->texdsp.dxt5ys_block; |
| else if (ycocg_classic) |
| ctx->tex_funct = ctx->texdsp.dxt5y_block; |
| else |
| ctx->tex_funct = ctx->texdsp.dxt5_block; |
| break; |
| case MKTAG('R', 'X', 'G', 'B'): |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxt5_block; |
| /* This format may be considered as a normal map, |
| * but it is handled differently in a separate postproc. */ |
| ctx->postproc = DDS_SWIZZLE_RXGB; |
| normal_map = 0; |
| break; |
| case MKTAG('A', 'T', 'I', '1'): |
| case MKTAG('B', 'C', '4', 'U'): |
| ctx->tex_ratio = 8; |
| ctx->tex_funct = ctx->texdsp.rgtc1u_block; |
| break; |
| case MKTAG('B', 'C', '4', 'S'): |
| ctx->tex_ratio = 8; |
| ctx->tex_funct = ctx->texdsp.rgtc1s_block; |
| break; |
| case MKTAG('A', 'T', 'I', '2'): |
| /* RGT2 variant with swapped R and G (3Dc)*/ |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxn3dc_block; |
| break; |
| case MKTAG('B', 'C', '5', 'U'): |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.rgtc2u_block; |
| break; |
| case MKTAG('B', 'C', '5', 'S'): |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.rgtc2s_block; |
| break; |
| case MKTAG('U', 'Y', 'V', 'Y'): |
| ctx->compressed = 0; |
| avctx->pix_fmt = AV_PIX_FMT_UYVY422; |
| break; |
| case MKTAG('Y', 'U', 'Y', '2'): |
| ctx->compressed = 0; |
| avctx->pix_fmt = AV_PIX_FMT_YUYV422; |
| break; |
| case MKTAG('P', '8', ' ', ' '): |
| /* ATI Palette8, same as normal palette */ |
| ctx->compressed = 0; |
| ctx->paletted = 1; |
| avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| break; |
| case MKTAG('G', '1', ' ', ' '): |
| ctx->compressed = 0; |
| avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; |
| break; |
| case MKTAG('D', 'X', '1', '0'): |
| /* DirectX 10 extra header */ |
| dxgi = bytestream2_get_le32(gbc); |
| bytestream2_skip(gbc, 4); // resourceDimension |
| bytestream2_skip(gbc, 4); // miscFlag |
| array = bytestream2_get_le32(gbc); |
| bytestream2_skip(gbc, 4); // miscFlag2 |
| |
| if (array != 0) |
| av_log(avctx, AV_LOG_VERBOSE, |
| "Found array of size %d (ignored).\n", array); |
| |
| /* Only BC[1-5] are actually compressed. */ |
| ctx->compressed = (dxgi >= 70) && (dxgi <= 84); |
| |
| av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi); |
| switch (dxgi) { |
| /* RGB types. */ |
| case DXGI_FORMAT_R16G16B16A16_TYPELESS: |
| case DXGI_FORMAT_R16G16B16A16_FLOAT: |
| case DXGI_FORMAT_R16G16B16A16_UNORM: |
| case DXGI_FORMAT_R16G16B16A16_UINT: |
| case DXGI_FORMAT_R16G16B16A16_SNORM: |
| case DXGI_FORMAT_R16G16B16A16_SINT: |
| avctx->pix_fmt = AV_PIX_FMT_BGRA64; |
| break; |
| case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB: |
| avctx->colorspace = AVCOL_SPC_RGB; |
| case DXGI_FORMAT_R8G8B8A8_TYPELESS: |
| case DXGI_FORMAT_R8G8B8A8_UNORM: |
| case DXGI_FORMAT_R8G8B8A8_UINT: |
| case DXGI_FORMAT_R8G8B8A8_SNORM: |
| case DXGI_FORMAT_R8G8B8A8_SINT: |
| avctx->pix_fmt = AV_PIX_FMT_BGRA; |
| break; |
| case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB: |
| avctx->colorspace = AVCOL_SPC_RGB; |
| case DXGI_FORMAT_B8G8R8A8_TYPELESS: |
| case DXGI_FORMAT_B8G8R8A8_UNORM: |
| avctx->pix_fmt = AV_PIX_FMT_RGBA; |
| break; |
| case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB: |
| avctx->colorspace = AVCOL_SPC_RGB; |
| case DXGI_FORMAT_B8G8R8X8_TYPELESS: |
| case DXGI_FORMAT_B8G8R8X8_UNORM: |
| avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque |
| break; |
| case DXGI_FORMAT_B5G6R5_UNORM: |
| avctx->pix_fmt = AV_PIX_FMT_RGB565LE; |
| break; |
| /* Texture types. */ |
| case DXGI_FORMAT_BC1_UNORM_SRGB: |
| avctx->colorspace = AVCOL_SPC_RGB; |
| case DXGI_FORMAT_BC1_TYPELESS: |
| case DXGI_FORMAT_BC1_UNORM: |
| ctx->tex_ratio = 8; |
| ctx->tex_funct = ctx->texdsp.dxt1a_block; |
| break; |
| case DXGI_FORMAT_BC2_UNORM_SRGB: |
| avctx->colorspace = AVCOL_SPC_RGB; |
| case DXGI_FORMAT_BC2_TYPELESS: |
| case DXGI_FORMAT_BC2_UNORM: |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxt3_block; |
| break; |
| case DXGI_FORMAT_BC3_UNORM_SRGB: |
| avctx->colorspace = AVCOL_SPC_RGB; |
| case DXGI_FORMAT_BC3_TYPELESS: |
| case DXGI_FORMAT_BC3_UNORM: |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.dxt5_block; |
| break; |
| case DXGI_FORMAT_BC4_TYPELESS: |
| case DXGI_FORMAT_BC4_UNORM: |
| ctx->tex_ratio = 8; |
| ctx->tex_funct = ctx->texdsp.rgtc1u_block; |
| break; |
| case DXGI_FORMAT_BC4_SNORM: |
| ctx->tex_ratio = 8; |
| ctx->tex_funct = ctx->texdsp.rgtc1s_block; |
| break; |
| case DXGI_FORMAT_BC5_TYPELESS: |
| case DXGI_FORMAT_BC5_UNORM: |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.rgtc2u_block; |
| break; |
| case DXGI_FORMAT_BC5_SNORM: |
| ctx->tex_ratio = 16; |
| ctx->tex_funct = ctx->texdsp.rgtc2s_block; |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, |
| "Unsupported DXGI format %d.\n", dxgi); |
| return AVERROR_INVALIDDATA; |
| } |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", av_fourcc2str(fourcc)); |
| return AVERROR_INVALIDDATA; |
| } |
| } else if (ctx->paletted) { |
| if (bpp == 8) { |
| avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| } else { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp); |
| return AVERROR_INVALIDDATA; |
| } |
| } else { |
| /* 4 bpp */ |
| if (bpp == 4 && r == 0 && g == 0 && b == 0 && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| /* 8 bpp */ |
| else if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
| else if (bpp == 8 && r == 0 && g == 0 && b == 0 && a == 0xff) |
| avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
| /* 16 bpp */ |
| else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00) |
| avctx->pix_fmt = AV_PIX_FMT_YA8; |
| else if (bpp == 16 && r == 0xff00 && g == 0 && b == 0 && a == 0xff) { |
| avctx->pix_fmt = AV_PIX_FMT_YA8; |
| ctx->postproc = DDS_SWAP_ALPHA; |
| } |
| else if (bpp == 16 && r == 0xffff && g == 0 && b == 0 && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_GRAY16LE; |
| else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_RGB555LE; |
| else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0x8000) |
| avctx->pix_fmt = AV_PIX_FMT_RGB555LE; // alpha ignored |
| else if (bpp == 16 && r == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_RGB565LE; |
| /* 24 bpp */ |
| else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_BGR24; |
| /* 32 bpp */ |
| else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_BGR0; // opaque |
| else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0) |
| avctx->pix_fmt = AV_PIX_FMT_RGB0; // opaque |
| else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000) |
| avctx->pix_fmt = AV_PIX_FMT_BGRA; |
| else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000) |
| avctx->pix_fmt = AV_PIX_FMT_RGBA; |
| /* give up */ |
| else { |
| av_log(avctx, AV_LOG_ERROR, "Unknown pixel format " |
| "[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| /* Set any remaining post-proc that should happen before frame is ready. */ |
| if (alpha_exponent) |
| ctx->postproc = DDS_ALPHA_EXP; |
| else if (normal_map) |
| ctx->postproc = DDS_NORMAL_MAP; |
| else if (ycocg_classic && !ctx->compressed) |
| ctx->postproc = DDS_RAW_YCOCG; |
| |
| /* ATI/NVidia variants sometimes add swizzling in bpp. */ |
| switch (bpp) { |
| case MKTAG('A', '2', 'X', 'Y'): |
| ctx->postproc = DDS_SWIZZLE_A2XY; |
| break; |
| case MKTAG('x', 'G', 'B', 'R'): |
| ctx->postproc = DDS_SWIZZLE_XGBR; |
| break; |
| case MKTAG('x', 'R', 'B', 'G'): |
| ctx->postproc = DDS_SWIZZLE_XRBG; |
| break; |
| case MKTAG('R', 'B', 'x', 'G'): |
| ctx->postproc = DDS_SWIZZLE_RBXG; |
| break; |
| case MKTAG('R', 'G', 'x', 'B'): |
| ctx->postproc = DDS_SWIZZLE_RGXB; |
| break; |
| 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 = lrint(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; |
| int width, height; |
| |
| 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).\n", |
| 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.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| bytestream2_skip(gbc, 4); // flags |
| |
| height = bytestream2_get_le32(gbc); |
| width = bytestream2_get_le32(gbc); |
| ret = ff_set_dimensions(avctx, width, height); |
| 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 if (!ctx->paletted && ctx->bpp == 4 && avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
| uint8_t *dst = frame->data[0]; |
| int x, y, i; |
| |
| /* Use the first 64 bytes as palette, then copy the rest. */ |
| bytestream2_get_buffer(gbc, frame->data[1], 16 * 4); |
| for (i = 0; i < 16; 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)+ |
| ((unsigned)frame->data[1][3+i*4]<<24) |
| ); |
| } |
| frame->palette_has_changed = 1; |
| |
| if (bytestream2_get_bytes_left(gbc) < frame->height * frame->width / 2) { |
| av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n", |
| bytestream2_get_bytes_left(gbc), frame->height * frame->width / 2); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| for (y = 0; y < frame->height; y++) { |
| for (x = 0; x < frame->width; x += 2) { |
| uint8_t val = bytestream2_get_byte(gbc); |
| dst[x ] = val & 0xF; |
| dst[x + 1] = val >> 4; |
| } |
| dst += frame->linesize[0]; |
| } |
| } 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)+ |
| ((unsigned)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 (ctx->postproc != DDS_NONE) |
| 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 |
| }; |
