2 * DirectDraw Surface image decoder
3 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * https://msdn.microsoft.com/en-us/library/bb943982%28v=vs.85%29.aspx
31 #include "libavutil/libm.h"
32 #include "libavutil/imgutils.h"
35 #include "bytestream.h"
37 #include "texturedsp.h"
40 #define DDPF_FOURCC (1 << 2)
41 #define DDPF_PALETTE (1 << 5)
42 #define DDPF_NORMALMAP (1 << 31)
61 DXGI_FORMAT_R16G16B16A16_TYPELESS = 9,
62 DXGI_FORMAT_R16G16B16A16_FLOAT = 10,
63 DXGI_FORMAT_R16G16B16A16_UNORM = 11,
64 DXGI_FORMAT_R16G16B16A16_UINT = 12,
65 DXGI_FORMAT_R16G16B16A16_SNORM = 13,
66 DXGI_FORMAT_R16G16B16A16_SINT = 14,
68 DXGI_FORMAT_R8G8B8A8_TYPELESS = 27,
69 DXGI_FORMAT_R8G8B8A8_UNORM = 28,
70 DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29,
71 DXGI_FORMAT_R8G8B8A8_UINT = 30,
72 DXGI_FORMAT_R8G8B8A8_SNORM = 31,
73 DXGI_FORMAT_R8G8B8A8_SINT = 32,
75 DXGI_FORMAT_BC1_TYPELESS = 70,
76 DXGI_FORMAT_BC1_UNORM = 71,
77 DXGI_FORMAT_BC1_UNORM_SRGB = 72,
78 DXGI_FORMAT_BC2_TYPELESS = 73,
79 DXGI_FORMAT_BC2_UNORM = 74,
80 DXGI_FORMAT_BC2_UNORM_SRGB = 75,
81 DXGI_FORMAT_BC3_TYPELESS = 76,
82 DXGI_FORMAT_BC3_UNORM = 77,
83 DXGI_FORMAT_BC3_UNORM_SRGB = 78,
84 DXGI_FORMAT_BC4_TYPELESS = 79,
85 DXGI_FORMAT_BC4_UNORM = 80,
86 DXGI_FORMAT_BC4_SNORM = 81,
87 DXGI_FORMAT_BC5_TYPELESS = 82,
88 DXGI_FORMAT_BC5_UNORM = 83,
89 DXGI_FORMAT_BC5_SNORM = 84,
90 DXGI_FORMAT_B5G6R5_UNORM = 85,
91 DXGI_FORMAT_B8G8R8A8_UNORM = 87,
92 DXGI_FORMAT_B8G8R8X8_UNORM = 88,
93 DXGI_FORMAT_B8G8R8A8_TYPELESS = 90,
94 DXGI_FORMAT_B8G8R8A8_UNORM_SRGB = 91,
95 DXGI_FORMAT_B8G8R8X8_TYPELESS = 92,
96 DXGI_FORMAT_B8G8R8X8_UNORM_SRGB = 93,
99 typedef struct DDSContext {
100 TextureDSPContext texdsp;
106 enum DDSPostProc postproc;
108 const uint8_t *tex_data; // Compressed texture
109 int tex_ratio; // Compression ratio
110 int slice_count; // Number of slices for threaded operations
112 /* Pointer to the selected compress or decompress function. */
113 int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
116 static int parse_pixel_format(AVCodecContext *avctx)
118 DDSContext *ctx = avctx->priv_data;
119 GetByteContext *gbc = &ctx->gbc;
121 uint32_t flags, fourcc, gimp_tag;
122 enum DDSDXGIFormat dxgi;
123 int size, bpp, r, g, b, a;
124 int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array;
126 /* Alternative DDS implementations use reserved1 as custom header. */
127 bytestream2_skip(gbc, 4 * 3);
128 gimp_tag = bytestream2_get_le32(gbc);
129 alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P');
130 ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1');
131 ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2');
132 bytestream2_skip(gbc, 4 * 7);
134 /* Now the real DDPF starts. */
135 size = bytestream2_get_le32(gbc);
137 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size);
138 return AVERROR_INVALIDDATA;
140 flags = bytestream2_get_le32(gbc);
141 ctx->compressed = flags & DDPF_FOURCC;
142 ctx->paletted = flags & DDPF_PALETTE;
143 normal_map = flags & DDPF_NORMALMAP;
144 fourcc = bytestream2_get_le32(gbc);
146 if (ctx->compressed && ctx->paletted) {
147 av_log(avctx, AV_LOG_WARNING,
148 "Disabling invalid palette flag for compressed dds.\n");
152 bpp = ctx->bpp = bytestream2_get_le32(gbc); // rgbbitcount
153 r = bytestream2_get_le32(gbc); // rbitmask
154 g = bytestream2_get_le32(gbc); // gbitmask
155 b = bytestream2_get_le32(gbc); // bbitmask
156 a = bytestream2_get_le32(gbc); // abitmask
158 bytestream2_skip(gbc, 4); // caps
159 bytestream2_skip(gbc, 4); // caps2
160 bytestream2_skip(gbc, 4); // caps3
161 bytestream2_skip(gbc, 4); // caps4
162 bytestream2_skip(gbc, 4); // reserved2
164 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
165 av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d "
166 "r 0x%x g 0x%x b 0x%x a 0x%x\n", buf, bpp, r, g, b, a);
168 av_get_codec_tag_string(buf, sizeof(buf), gimp_tag);
169 av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", buf);
173 avctx->pix_fmt = AV_PIX_FMT_RGBA;
175 if (ctx->compressed) {
177 case MKTAG('D', 'X', 'T', '1'):
179 ctx->tex_funct = ctx->texdsp.dxt1a_block;
181 case MKTAG('D', 'X', 'T', '2'):
183 ctx->tex_funct = ctx->texdsp.dxt2_block;
185 case MKTAG('D', 'X', 'T', '3'):
187 ctx->tex_funct = ctx->texdsp.dxt3_block;
189 case MKTAG('D', 'X', 'T', '4'):
191 ctx->tex_funct = ctx->texdsp.dxt4_block;
193 case MKTAG('D', 'X', 'T', '5'):
196 ctx->tex_funct = ctx->texdsp.dxt5ys_block;
197 else if (ycocg_classic)
198 ctx->tex_funct = ctx->texdsp.dxt5y_block;
200 ctx->tex_funct = ctx->texdsp.dxt5_block;
202 case MKTAG('R', 'X', 'G', 'B'):
204 ctx->tex_funct = ctx->texdsp.dxt5_block;
205 /* This format may be considered as a normal map,
206 * but it is handled differently in a separate postproc. */
207 ctx->postproc = DDS_SWIZZLE_RXGB;
210 case MKTAG('A', 'T', 'I', '1'):
211 case MKTAG('B', 'C', '4', 'U'):
213 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
215 case MKTAG('B', 'C', '4', 'S'):
217 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
219 case MKTAG('A', 'T', 'I', '2'):
220 /* RGT2 variant with swapped R and G (3Dc)*/
222 ctx->tex_funct = ctx->texdsp.dxn3dc_block;
224 case MKTAG('B', 'C', '5', 'U'):
226 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
228 case MKTAG('B', 'C', '5', 'S'):
230 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
232 case MKTAG('U', 'Y', 'V', 'Y'):
234 avctx->pix_fmt = AV_PIX_FMT_UYVY422;
236 case MKTAG('Y', 'U', 'Y', '2'):
238 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
240 case MKTAG('P', '8', ' ', ' '):
241 /* ATI Palette8, same as normal palette */
244 avctx->pix_fmt = AV_PIX_FMT_PAL8;
246 case MKTAG('G', '1', ' ', ' '):
248 avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
250 case MKTAG('D', 'X', '1', '0'):
251 /* DirectX 10 extra header */
252 dxgi = bytestream2_get_le32(gbc);
253 bytestream2_skip(gbc, 4); // resourceDimension
254 bytestream2_skip(gbc, 4); // miscFlag
255 array = bytestream2_get_le32(gbc);
256 bytestream2_skip(gbc, 4); // miscFlag2
259 av_log(avctx, AV_LOG_VERBOSE,
260 "Found array of size %d (ignored).\n", array);
262 /* Only BC[1-5] are actually compressed. */
263 ctx->compressed = (dxgi >= 70) && (dxgi <= 84);
265 av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi);
268 case DXGI_FORMAT_R16G16B16A16_TYPELESS:
269 case DXGI_FORMAT_R16G16B16A16_FLOAT:
270 case DXGI_FORMAT_R16G16B16A16_UNORM:
271 case DXGI_FORMAT_R16G16B16A16_UINT:
272 case DXGI_FORMAT_R16G16B16A16_SNORM:
273 case DXGI_FORMAT_R16G16B16A16_SINT:
274 avctx->pix_fmt = AV_PIX_FMT_BGRA64;
276 case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
277 avctx->colorspace = AVCOL_SPC_RGB;
278 case DXGI_FORMAT_R8G8B8A8_TYPELESS:
279 case DXGI_FORMAT_R8G8B8A8_UNORM:
280 case DXGI_FORMAT_R8G8B8A8_UINT:
281 case DXGI_FORMAT_R8G8B8A8_SNORM:
282 case DXGI_FORMAT_R8G8B8A8_SINT:
283 avctx->pix_fmt = AV_PIX_FMT_BGRA;
285 case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
286 avctx->colorspace = AVCOL_SPC_RGB;
287 case DXGI_FORMAT_B8G8R8A8_TYPELESS:
288 case DXGI_FORMAT_B8G8R8A8_UNORM:
289 avctx->pix_fmt = AV_PIX_FMT_RGBA;
291 case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
292 avctx->colorspace = AVCOL_SPC_RGB;
293 case DXGI_FORMAT_B8G8R8X8_TYPELESS:
294 case DXGI_FORMAT_B8G8R8X8_UNORM:
295 avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
297 case DXGI_FORMAT_B5G6R5_UNORM:
298 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
301 case DXGI_FORMAT_BC1_UNORM_SRGB:
302 avctx->colorspace = AVCOL_SPC_RGB;
303 case DXGI_FORMAT_BC1_TYPELESS:
304 case DXGI_FORMAT_BC1_UNORM:
306 ctx->tex_funct = ctx->texdsp.dxt1a_block;
308 case DXGI_FORMAT_BC2_UNORM_SRGB:
309 avctx->colorspace = AVCOL_SPC_RGB;
310 case DXGI_FORMAT_BC2_TYPELESS:
311 case DXGI_FORMAT_BC2_UNORM:
313 ctx->tex_funct = ctx->texdsp.dxt3_block;
315 case DXGI_FORMAT_BC3_UNORM_SRGB:
316 avctx->colorspace = AVCOL_SPC_RGB;
317 case DXGI_FORMAT_BC3_TYPELESS:
318 case DXGI_FORMAT_BC3_UNORM:
320 ctx->tex_funct = ctx->texdsp.dxt5_block;
322 case DXGI_FORMAT_BC4_TYPELESS:
323 case DXGI_FORMAT_BC4_UNORM:
325 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
327 case DXGI_FORMAT_BC4_SNORM:
329 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
331 case DXGI_FORMAT_BC5_TYPELESS:
332 case DXGI_FORMAT_BC5_UNORM:
334 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
336 case DXGI_FORMAT_BC5_SNORM:
338 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
341 av_log(avctx, AV_LOG_ERROR,
342 "Unsupported DXGI format %d.\n", dxgi);
343 return AVERROR_INVALIDDATA;
347 av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", buf);
348 return AVERROR_INVALIDDATA;
350 } else if (ctx->paletted) {
352 avctx->pix_fmt = AV_PIX_FMT_PAL8;
354 av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp);
355 return AVERROR_INVALIDDATA;
359 if (bpp == 4 && r == 0 && g == 0 && b == 0 && a == 0)
360 avctx->pix_fmt = AV_PIX_FMT_PAL8;
362 else if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0)
363 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
364 else if (bpp == 8 && r == 0 && g == 0 && b == 0 && a == 0xff)
365 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
367 else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00)
368 avctx->pix_fmt = AV_PIX_FMT_YA8;
369 else if (bpp == 16 && r == 0xff00 && g == 0 && b == 0 && a == 0xff) {
370 avctx->pix_fmt = AV_PIX_FMT_YA8;
371 ctx->postproc = DDS_SWAP_ALPHA;
373 else if (bpp == 16 && r == 0xffff && g == 0 && b == 0 && a == 0)
374 avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
375 else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0)
376 avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
377 else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0x8000)
378 avctx->pix_fmt = AV_PIX_FMT_RGB555LE; // alpha ignored
379 else if (bpp == 16 && r == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0)
380 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
382 else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
383 avctx->pix_fmt = AV_PIX_FMT_BGR24;
385 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
386 avctx->pix_fmt = AV_PIX_FMT_BGR0; // opaque
387 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0)
388 avctx->pix_fmt = AV_PIX_FMT_RGB0; // opaque
389 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000)
390 avctx->pix_fmt = AV_PIX_FMT_BGRA;
391 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000)
392 avctx->pix_fmt = AV_PIX_FMT_RGBA;
395 av_log(avctx, AV_LOG_ERROR, "Unknown pixel format "
396 "[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a);
397 return AVERROR_INVALIDDATA;
401 /* Set any remaining post-proc that should happen before frame is ready. */
403 ctx->postproc = DDS_ALPHA_EXP;
405 ctx->postproc = DDS_NORMAL_MAP;
406 else if (ycocg_classic && !ctx->compressed)
407 ctx->postproc = DDS_RAW_YCOCG;
409 /* ATI/NVidia variants sometimes add swizzling in bpp. */
411 case MKTAG('A', '2', 'X', 'Y'):
412 ctx->postproc = DDS_SWIZZLE_A2XY;
414 case MKTAG('x', 'G', 'B', 'R'):
415 ctx->postproc = DDS_SWIZZLE_XGBR;
417 case MKTAG('x', 'R', 'B', 'G'):
418 ctx->postproc = DDS_SWIZZLE_XRBG;
420 case MKTAG('R', 'B', 'x', 'G'):
421 ctx->postproc = DDS_SWIZZLE_RBXG;
423 case MKTAG('R', 'G', 'x', 'B'):
424 ctx->postproc = DDS_SWIZZLE_RGXB;
426 case MKTAG('R', 'x', 'B', 'G'):
427 ctx->postproc = DDS_SWIZZLE_RXBG;
429 case MKTAG('x', 'G', 'x', 'R'):
430 ctx->postproc = DDS_SWIZZLE_XGXR;
432 case MKTAG('A', '2', 'D', '5'):
433 ctx->postproc = DDS_NORMAL_MAP;
440 static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
441 int slice, int thread_nb)
443 DDSContext *ctx = avctx->priv_data;
444 AVFrame *frame = arg;
445 const uint8_t *d = ctx->tex_data;
446 int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
447 int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
449 int start_slice, end_slice;
450 int base_blocks_per_slice = h_block / ctx->slice_count;
451 int remainder_blocks = h_block % ctx->slice_count;
453 /* When the frame height (in blocks) doesn't divide evenly between the
454 * number of slices, spread the remaining blocks evenly between the first
456 start_slice = slice * base_blocks_per_slice;
457 /* Add any extra blocks (one per slice) that have been added before this slice */
458 start_slice += FFMIN(slice, remainder_blocks);
460 end_slice = start_slice + base_blocks_per_slice;
461 /* Add an extra block if there are still remainder blocks to be accounted for */
462 if (slice < remainder_blocks)
465 for (y = start_slice; y < end_slice; y++) {
466 uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
467 int off = y * w_block;
468 for (x = 0; x < w_block; x++) {
469 ctx->tex_funct(p + x * 16, frame->linesize[0],
470 d + (off + x) * ctx->tex_ratio);
477 static void do_swizzle(AVFrame *frame, int x, int y)
480 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
481 uint8_t *src = frame->data[0] + i;
482 FFSWAP(uint8_t, src[x], src[y]);
486 static void run_postproc(AVCodecContext *avctx, AVFrame *frame)
488 DDSContext *ctx = avctx->priv_data;
491 switch (ctx->postproc) {
493 /* Alpha-exponential mode divides each channel by the maximum
494 * R, G or B value, and stores the multiplying factor in the
496 av_log(avctx, AV_LOG_DEBUG, "Post-processing alpha exponent.\n");
498 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
499 uint8_t *src = frame->data[0] + i;
505 src[0] = r * a / 255;
506 src[1] = g * a / 255;
507 src[2] = b * a / 255;
512 /* Normal maps work in the XYZ color space and they encode
513 * X in R or in A, depending on the texture type, Y in G and
514 * derive Z with a square root of the distance.
516 * http://www.realtimecollisiondetection.net/blog/?p=28 */
517 av_log(avctx, AV_LOG_DEBUG, "Post-processing normal map.\n");
519 x_off = ctx->tex_ratio == 8 ? 0 : 3;
520 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
521 uint8_t *src = frame->data[0] + i;
526 int d = (255 * 255 - x * x - y * y) / 2;
537 /* Data is Y-Co-Cg-A and not RGBA, but they are represented
538 * with the same masks in the DDPF header. */
539 av_log(avctx, AV_LOG_DEBUG, "Post-processing raw YCoCg.\n");
541 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
542 uint8_t *src = frame->data[0] + i;
544 int cg = src[1] - 128;
545 int co = src[2] - 128;
548 src[0] = av_clip_uint8(y + co - cg);
549 src[1] = av_clip_uint8(y + cg);
550 src[2] = av_clip_uint8(y - co - cg);
555 /* Alpha and Luma are stored swapped. */
556 av_log(avctx, AV_LOG_DEBUG, "Post-processing swapped Luma/Alpha.\n");
558 for (i = 0; i < frame->linesize[0] * frame->height; i += 2) {
559 uint8_t *src = frame->data[0] + i;
560 FFSWAP(uint8_t, src[0], src[1]);
563 case DDS_SWIZZLE_A2XY:
564 /* Swap R and G, often used to restore a standard RGTC2. */
565 av_log(avctx, AV_LOG_DEBUG, "Post-processing A2XY swizzle.\n");
566 do_swizzle(frame, 0, 1);
568 case DDS_SWIZZLE_RBXG:
569 /* Swap G and A, then B and new A (G). */
570 av_log(avctx, AV_LOG_DEBUG, "Post-processing RBXG swizzle.\n");
571 do_swizzle(frame, 1, 3);
572 do_swizzle(frame, 2, 3);
574 case DDS_SWIZZLE_RGXB:
576 av_log(avctx, AV_LOG_DEBUG, "Post-processing RGXB swizzle.\n");
577 do_swizzle(frame, 2, 3);
579 case DDS_SWIZZLE_RXBG:
581 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXBG swizzle.\n");
582 do_swizzle(frame, 1, 3);
584 case DDS_SWIZZLE_RXGB:
585 /* Swap R and A (misleading name). */
586 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXGB swizzle.\n");
587 do_swizzle(frame, 0, 3);
589 case DDS_SWIZZLE_XGBR:
590 /* Swap B and A, then R and new A (B). */
591 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGBR swizzle.\n");
592 do_swizzle(frame, 2, 3);
593 do_swizzle(frame, 0, 3);
595 case DDS_SWIZZLE_XGXR:
596 /* Swap G and A, then R and new A (G), then new R (G) and new G (A).
597 * This variant does not store any B component. */
598 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGXR swizzle.\n");
599 do_swizzle(frame, 1, 3);
600 do_swizzle(frame, 0, 3);
601 do_swizzle(frame, 0, 1);
603 case DDS_SWIZZLE_XRBG:
604 /* Swap G and A, then R and new A (G). */
605 av_log(avctx, AV_LOG_DEBUG, "Post-processing XRBG swizzle.\n");
606 do_swizzle(frame, 1, 3);
607 do_swizzle(frame, 0, 3);
612 static int dds_decode(AVCodecContext *avctx, void *data,
613 int *got_frame, AVPacket *avpkt)
615 DDSContext *ctx = avctx->priv_data;
616 GetByteContext *gbc = &ctx->gbc;
617 AVFrame *frame = data;
621 ff_texturedsp_init(&ctx->texdsp);
622 bytestream2_init(gbc, avpkt->data, avpkt->size);
624 if (bytestream2_get_bytes_left(gbc) < 128) {
625 av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n",
626 bytestream2_get_bytes_left(gbc));
627 return AVERROR_INVALIDDATA;
630 if (bytestream2_get_le32(gbc) != MKTAG('D', 'D', 'S', ' ') ||
631 bytestream2_get_le32(gbc) != 124) { // header size
632 av_log(avctx, AV_LOG_ERROR, "Invalid DDS header.\n");
633 return AVERROR_INVALIDDATA;
636 bytestream2_skip(gbc, 4); // flags
638 avctx->height = bytestream2_get_le32(gbc);
639 avctx->width = bytestream2_get_le32(gbc);
640 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
642 av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
643 avctx->width, avctx->height);
647 /* Since codec is based on 4x4 blocks, size is aligned to 4. */
648 avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
649 avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
651 bytestream2_skip(gbc, 4); // pitch
652 bytestream2_skip(gbc, 4); // depth
653 mipmap = bytestream2_get_le32(gbc);
655 av_log(avctx, AV_LOG_VERBOSE, "Found %d mipmaps (ignored).\n", mipmap);
657 /* Extract pixel format information, considering additional elements
658 * in reserved1 and reserved2. */
659 ret = parse_pixel_format(avctx);
663 ret = ff_get_buffer(avctx, frame, 0);
667 if (ctx->compressed) {
668 int size = (avctx->coded_height / TEXTURE_BLOCK_H) *
669 (avctx->coded_width / TEXTURE_BLOCK_W) * ctx->tex_ratio;
670 ctx->slice_count = av_clip(avctx->thread_count, 1,
671 avctx->coded_height / TEXTURE_BLOCK_H);
673 if (bytestream2_get_bytes_left(gbc) < size) {
674 av_log(avctx, AV_LOG_ERROR,
675 "Compressed Buffer is too small (%d < %d).\n",
676 bytestream2_get_bytes_left(gbc), size);
677 return AVERROR_INVALIDDATA;
680 /* Use the decompress function on the texture, one block per thread. */
681 ctx->tex_data = gbc->buffer;
682 avctx->execute2(avctx, decompress_texture_thread, frame, NULL, ctx->slice_count);
683 } else if (!ctx->paletted && ctx->bpp == 4) {
684 uint8_t *dst = frame->data[0];
687 /* Use the first 64 bytes as palette, then copy the rest. */
688 bytestream2_get_buffer(gbc, frame->data[1], 16 * 4);
689 for (i = 0; i < 16; i++) {
690 AV_WN32(frame->data[1] + i*4,
691 (frame->data[1][2+i*4]<<0)+
692 (frame->data[1][1+i*4]<<8)+
693 (frame->data[1][0+i*4]<<16)+
694 (frame->data[1][3+i*4]<<24)
697 frame->palette_has_changed = 1;
699 if (bytestream2_get_bytes_left(gbc) < frame->height * frame->width / 2) {
700 av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
701 bytestream2_get_bytes_left(gbc), frame->height * frame->width / 2);
702 return AVERROR_INVALIDDATA;
705 for (y = 0; y < frame->height; y++) {
706 for (x = 0; x < frame->width; x += 2) {
707 uint8_t val = bytestream2_get_byte(gbc);
709 dst[x + 1] = val >> 4;
711 dst += frame->linesize[0];
714 int linesize = av_image_get_linesize(avctx->pix_fmt, frame->width, 0);
718 /* Use the first 1024 bytes as palette, then copy the rest. */
719 bytestream2_get_buffer(gbc, frame->data[1], 256 * 4);
720 for (i = 0; i < 256; i++)
721 AV_WN32(frame->data[1] + i*4,
722 (frame->data[1][2+i*4]<<0)+
723 (frame->data[1][1+i*4]<<8)+
724 (frame->data[1][0+i*4]<<16)+
725 (frame->data[1][3+i*4]<<24)
728 frame->palette_has_changed = 1;
731 if (bytestream2_get_bytes_left(gbc) < frame->height * linesize) {
732 av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
733 bytestream2_get_bytes_left(gbc), frame->height * linesize);
734 return AVERROR_INVALIDDATA;
737 av_image_copy_plane(frame->data[0], frame->linesize[0],
738 gbc->buffer, linesize,
739 linesize, frame->height);
742 /* Run any post processing here if needed. */
743 if (ctx->postproc != DDS_NONE)
744 run_postproc(avctx, frame);
746 /* Frame is ready to be output. */
747 frame->pict_type = AV_PICTURE_TYPE_I;
748 frame->key_frame = 1;
754 AVCodec ff_dds_decoder = {
756 .long_name = NULL_IF_CONFIG_SMALL("DirectDraw Surface image decoder"),
757 .type = AVMEDIA_TYPE_VIDEO,
758 .id = AV_CODEC_ID_DDS,
759 .decode = dds_decode,
760 .priv_data_size = sizeof(DDSContext),
761 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
762 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE