2 * DirectDraw Surface image decoder
3 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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/imgutils.h"
34 #include "bytestream.h"
36 #include "texturedsp.h"
39 #define DDPF_FOURCC (1 << 2)
40 #define DDPF_PALETTE (1 << 5)
41 #define DDPF_NORMALMAP (1 << 31)
59 DXGI_FORMAT_R16G16B16A16_TYPELESS = 9,
60 DXGI_FORMAT_R16G16B16A16_FLOAT = 10,
61 DXGI_FORMAT_R16G16B16A16_UNORM = 11,
62 DXGI_FORMAT_R16G16B16A16_UINT = 12,
63 DXGI_FORMAT_R16G16B16A16_SNORM = 13,
64 DXGI_FORMAT_R16G16B16A16_SINT = 14,
66 DXGI_FORMAT_R8G8B8A8_TYPELESS = 27,
67 DXGI_FORMAT_R8G8B8A8_UNORM = 28,
68 DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29,
69 DXGI_FORMAT_R8G8B8A8_UINT = 30,
70 DXGI_FORMAT_R8G8B8A8_SNORM = 31,
71 DXGI_FORMAT_R8G8B8A8_SINT = 32,
73 DXGI_FORMAT_BC1_TYPELESS = 70,
74 DXGI_FORMAT_BC1_UNORM = 71,
75 DXGI_FORMAT_BC1_UNORM_SRGB = 72,
76 DXGI_FORMAT_BC2_TYPELESS = 73,
77 DXGI_FORMAT_BC2_UNORM = 74,
78 DXGI_FORMAT_BC2_UNORM_SRGB = 75,
79 DXGI_FORMAT_BC3_TYPELESS = 76,
80 DXGI_FORMAT_BC3_UNORM = 77,
81 DXGI_FORMAT_BC3_UNORM_SRGB = 78,
82 DXGI_FORMAT_BC4_TYPELESS = 79,
83 DXGI_FORMAT_BC4_UNORM = 80,
84 DXGI_FORMAT_BC4_SNORM = 81,
85 DXGI_FORMAT_BC5_TYPELESS = 82,
86 DXGI_FORMAT_BC5_UNORM = 83,
87 DXGI_FORMAT_BC5_SNORM = 84,
88 DXGI_FORMAT_B5G6R5_UNORM = 85,
89 DXGI_FORMAT_B8G8R8A8_UNORM = 87,
90 DXGI_FORMAT_B8G8R8X8_UNORM = 88,
91 DXGI_FORMAT_B8G8R8A8_TYPELESS = 90,
92 DXGI_FORMAT_B8G8R8A8_UNORM_SRGB = 91,
93 DXGI_FORMAT_B8G8R8X8_TYPELESS = 92,
94 DXGI_FORMAT_B8G8R8X8_UNORM_SRGB = 93,
97 typedef struct DDSContext {
98 TextureDSPContext texdsp;
103 enum DDSPostProc postproc;
105 const uint8_t *tex_data; // Compressed texture
106 int tex_ratio; // Compression ratio
107 int slice_count; // Number of slices for threaded operations
109 /* Pointer to the selected compress or decompress function. */
110 int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
113 static int parse_pixel_format(AVCodecContext *avctx)
115 DDSContext *ctx = avctx->priv_data;
116 GetByteContext *gbc = &ctx->gbc;
118 uint32_t flags, fourcc, gimp_tag;
119 enum DDSDXGIFormat dxgi;
120 int size, bpp, r, g, b, a;
121 int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array;
123 /* Alternative DDS implementations use reserved1 as custom header. */
124 bytestream2_skip(gbc, 4 * 3);
125 gimp_tag = bytestream2_get_le32(gbc);
126 alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P');
127 ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1');
128 ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2');
129 bytestream2_skip(gbc, 4 * 7);
131 /* Now the real DDPF starts. */
132 size = bytestream2_get_le32(gbc);
134 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size);
135 return AVERROR_INVALIDDATA;
137 flags = bytestream2_get_le32(gbc);
138 ctx->compressed = flags & DDPF_FOURCC;
139 ctx->paletted = flags & DDPF_PALETTE;
140 normal_map = flags & DDPF_NORMALMAP;
141 fourcc = bytestream2_get_le32(gbc);
143 if (ctx->compressed && ctx->paletted) {
144 av_log(avctx, AV_LOG_WARNING,
145 "Disabling invalid palette flag for compressed dds.\n");
149 bpp = bytestream2_get_le32(gbc); // rgbbitcount
150 r = bytestream2_get_le32(gbc); // rbitmask
151 g = bytestream2_get_le32(gbc); // gbitmask
152 b = bytestream2_get_le32(gbc); // bbitmask
153 a = bytestream2_get_le32(gbc); // abitmask
155 bytestream2_skip(gbc, 4); // caps
156 bytestream2_skip(gbc, 4); // caps2
157 bytestream2_skip(gbc, 4); // caps3
158 bytestream2_skip(gbc, 4); // caps4
159 bytestream2_skip(gbc, 4); // reserved2
161 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
162 av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d "
163 "r 0x%x g 0x%x b 0x%x a 0x%x\n", buf, bpp, r, g, b, a);
165 av_get_codec_tag_string(buf, sizeof(buf), gimp_tag);
166 av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", buf);
170 avctx->pix_fmt = AV_PIX_FMT_RGBA;
172 if (ctx->compressed) {
174 case MKTAG('D', 'X', 'T', '1'):
176 ctx->tex_funct = ctx->texdsp.dxt1a_block;
178 case MKTAG('D', 'X', 'T', '2'):
180 ctx->tex_funct = ctx->texdsp.dxt2_block;
182 case MKTAG('D', 'X', 'T', '3'):
184 ctx->tex_funct = ctx->texdsp.dxt3_block;
186 case MKTAG('D', 'X', 'T', '4'):
188 ctx->tex_funct = ctx->texdsp.dxt4_block;
190 case MKTAG('D', 'X', 'T', '5'):
193 ctx->tex_funct = ctx->texdsp.dxt5ys_block;
194 else if (ycocg_classic)
195 ctx->tex_funct = ctx->texdsp.dxt5y_block;
197 ctx->tex_funct = ctx->texdsp.dxt5_block;
199 case MKTAG('R', 'X', 'G', 'B'):
201 ctx->tex_funct = ctx->texdsp.dxt5_block;
202 /* This format may be considered as a normal map,
203 * but it is handled differently in a separate postproc. */
204 ctx->postproc = DDS_SWIZZLE_RXGB;
207 case MKTAG('A', 'T', 'I', '1'):
208 case MKTAG('B', 'C', '4', 'U'):
210 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
212 case MKTAG('B', 'C', '4', 'S'):
214 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
216 case MKTAG('A', 'T', 'I', '2'):
217 /* RGT2 variant with swapped R and G (3Dc)*/
219 ctx->tex_funct = ctx->texdsp.dxn3dc_block;
221 case MKTAG('B', 'C', '5', 'U'):
223 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
225 case MKTAG('B', 'C', '5', 'S'):
227 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
229 case MKTAG('U', 'Y', 'V', 'Y'):
231 avctx->pix_fmt = AV_PIX_FMT_UYVY422;
233 case MKTAG('Y', 'U', 'Y', '2'):
235 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
237 case MKTAG('P', '8', ' ', ' '):
238 /* ATI Palette8, same as normal palette */
241 avctx->pix_fmt = AV_PIX_FMT_PAL8;
243 case MKTAG('G', '1', ' ', ' '):
245 avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
247 case MKTAG('D', 'X', '1', '0'):
248 /* DirectX 10 extra header */
249 dxgi = bytestream2_get_le32(gbc);
250 bytestream2_skip(gbc, 4); // resourceDimension
251 bytestream2_skip(gbc, 4); // miscFlag
252 array = bytestream2_get_le32(gbc);
253 bytestream2_skip(gbc, 4); // miscFlag2
256 av_log(avctx, AV_LOG_VERBOSE,
257 "Found array of size %d (ignored).\n", array);
259 /* Only BC[1-5] are actually compressed. */
260 ctx->compressed = (dxgi >= 70) && (dxgi <= 84);
262 av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi);
265 case DXGI_FORMAT_R16G16B16A16_TYPELESS:
266 case DXGI_FORMAT_R16G16B16A16_FLOAT:
267 case DXGI_FORMAT_R16G16B16A16_UNORM:
268 case DXGI_FORMAT_R16G16B16A16_UINT:
269 case DXGI_FORMAT_R16G16B16A16_SNORM:
270 case DXGI_FORMAT_R16G16B16A16_SINT:
271 avctx->pix_fmt = AV_PIX_FMT_BGRA64;
273 case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
274 avctx->colorspace = AVCOL_SPC_RGB;
275 case DXGI_FORMAT_R8G8B8A8_TYPELESS:
276 case DXGI_FORMAT_R8G8B8A8_UNORM:
277 case DXGI_FORMAT_R8G8B8A8_UINT:
278 case DXGI_FORMAT_R8G8B8A8_SNORM:
279 case DXGI_FORMAT_R8G8B8A8_SINT:
280 avctx->pix_fmt = AV_PIX_FMT_BGRA;
282 case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
283 avctx->colorspace = AVCOL_SPC_RGB;
284 case DXGI_FORMAT_B8G8R8A8_TYPELESS:
285 case DXGI_FORMAT_B8G8R8A8_UNORM:
286 avctx->pix_fmt = AV_PIX_FMT_RGBA;
288 case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
289 avctx->colorspace = AVCOL_SPC_RGB;
290 case DXGI_FORMAT_B8G8R8X8_TYPELESS:
291 case DXGI_FORMAT_B8G8R8X8_UNORM:
292 avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
294 case DXGI_FORMAT_B5G6R5_UNORM:
295 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
298 case DXGI_FORMAT_BC1_UNORM_SRGB:
299 avctx->colorspace = AVCOL_SPC_RGB;
300 case DXGI_FORMAT_BC1_TYPELESS:
301 case DXGI_FORMAT_BC1_UNORM:
303 ctx->tex_funct = ctx->texdsp.dxt1a_block;
305 case DXGI_FORMAT_BC2_UNORM_SRGB:
306 avctx->colorspace = AVCOL_SPC_RGB;
307 case DXGI_FORMAT_BC2_TYPELESS:
308 case DXGI_FORMAT_BC2_UNORM:
310 ctx->tex_funct = ctx->texdsp.dxt3_block;
312 case DXGI_FORMAT_BC3_UNORM_SRGB:
313 avctx->colorspace = AVCOL_SPC_RGB;
314 case DXGI_FORMAT_BC3_TYPELESS:
315 case DXGI_FORMAT_BC3_UNORM:
317 ctx->tex_funct = ctx->texdsp.dxt5_block;
319 case DXGI_FORMAT_BC4_TYPELESS:
320 case DXGI_FORMAT_BC4_UNORM:
322 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
324 case DXGI_FORMAT_BC4_SNORM:
326 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
328 case DXGI_FORMAT_BC5_TYPELESS:
329 case DXGI_FORMAT_BC5_UNORM:
331 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
333 case DXGI_FORMAT_BC5_SNORM:
335 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
338 av_log(avctx, AV_LOG_ERROR,
339 "Unsupported DXGI format %d.\n", dxgi);
340 return AVERROR_INVALIDDATA;
344 av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", buf);
345 return AVERROR_INVALIDDATA;
347 } else if (ctx->paletted) {
349 avctx->pix_fmt = AV_PIX_FMT_PAL8;
351 av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp);
352 return AVERROR_INVALIDDATA;
356 if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0)
357 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
358 else if (bpp == 8 && r == 0 && g == 0 && b == 0 && a == 0xff)
359 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
361 else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00)
362 avctx->pix_fmt = AV_PIX_FMT_YA8;
363 else if (bpp == 16 && r == 0xffff && g == 0 && b == 0 && a == 0)
364 avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
365 else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0)
366 avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
367 else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0x8000)
368 avctx->pix_fmt = AV_PIX_FMT_RGB555LE; // alpha ignored
369 else if (bpp == 16 && r == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0)
370 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
372 else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
373 avctx->pix_fmt = AV_PIX_FMT_BGR24;
375 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
376 avctx->pix_fmt = AV_PIX_FMT_BGRA; // opaque
377 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0)
378 avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
379 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000)
380 avctx->pix_fmt = AV_PIX_FMT_BGRA;
381 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000)
382 avctx->pix_fmt = AV_PIX_FMT_RGBA;
385 av_log(avctx, AV_LOG_ERROR, "Unknown pixel format "
386 "[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a);
387 return AVERROR_INVALIDDATA;
391 /* Set any remaining post-proc that should happen before frame is ready. */
393 ctx->postproc = DDS_ALPHA_EXP;
395 ctx->postproc = DDS_NORMAL_MAP;
396 else if (ycocg_classic && !ctx->compressed)
397 ctx->postproc = DDS_RAW_YCOCG;
399 /* ATI/NVidia variants sometimes add swizzling in bpp. */
401 case MKTAG('A', '2', 'X', 'Y'):
402 ctx->postproc = DDS_SWIZZLE_A2XY;
404 case MKTAG('x', 'G', 'B', 'R'):
405 ctx->postproc = DDS_SWIZZLE_XGBR;
407 case MKTAG('x', 'R', 'B', 'G'):
408 ctx->postproc = DDS_SWIZZLE_XRBG;
410 case MKTAG('R', 'B', 'x', 'G'):
411 ctx->postproc = DDS_SWIZZLE_RBXG;
413 case MKTAG('R', 'G', 'x', 'B'):
414 ctx->postproc = DDS_SWIZZLE_RGXB;
416 case MKTAG('R', 'x', 'B', 'G'):
417 ctx->postproc = DDS_SWIZZLE_RXBG;
419 case MKTAG('x', 'G', 'x', 'R'):
420 ctx->postproc = DDS_SWIZZLE_XGXR;
422 case MKTAG('A', '2', 'D', '5'):
423 ctx->postproc = DDS_NORMAL_MAP;
430 static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
431 int slice, int thread_nb)
433 DDSContext *ctx = avctx->priv_data;
434 AVFrame *frame = arg;
435 const uint8_t *d = ctx->tex_data;
436 int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
437 int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
439 int start_slice, end_slice;
440 int base_blocks_per_slice = h_block / ctx->slice_count;
441 int remainder_blocks = h_block % ctx->slice_count;
443 /* When the frame height (in blocks) doesn't divide evenly between the
444 * number of slices, spread the remaining blocks evenly between the first
446 start_slice = slice * base_blocks_per_slice;
447 /* Add any extra blocks (one per slice) that have been added before this slice */
448 start_slice += FFMIN(slice, remainder_blocks);
450 end_slice = start_slice + base_blocks_per_slice;
451 /* Add an extra block if there are still remainder blocks to be accounted for */
452 if (slice < remainder_blocks)
455 for (y = start_slice; y < end_slice; y++) {
456 uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
457 int off = y * w_block;
458 for (x = 0; x < w_block; x++) {
459 ctx->tex_funct(p + x * 16, frame->linesize[0],
460 d + (off + x) * ctx->tex_ratio);
467 static void do_swizzle(AVFrame *frame, int x, int y)
470 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
471 uint8_t *src = frame->data[0] + i;
472 FFSWAP(uint8_t, src[x], src[y]);
476 static void run_postproc(AVCodecContext *avctx, AVFrame *frame)
478 DDSContext *ctx = avctx->priv_data;
481 switch (ctx->postproc) {
483 /* Alpha-exponential mode divides each channel by the maximum
484 * R, G or B value, and stores the multiplying factor in the
486 av_log(avctx, AV_LOG_DEBUG, "Post-processing alpha exponent.\n");
488 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
489 uint8_t *src = frame->data[0] + i;
495 src[0] = r * a / 255;
496 src[1] = g * a / 255;
497 src[2] = b * a / 255;
502 /* Normal maps work in the XYZ color space and they encode
503 * X in R or in A, depending on the texture type, Y in G and
504 * derive Z with a square root of the distance.
506 * http://www.realtimecollisiondetection.net/blog/?p=28 */
507 av_log(avctx, AV_LOG_DEBUG, "Post-processing normal map.\n");
509 x_off = ctx->tex_ratio == 8 ? 0 : 3;
510 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
511 uint8_t *src = frame->data[0] + i;
516 int d = (255 * 255 - x * x - y * y) / 2;
527 /* Data is Y-Co-Cg-A and not RGBA, but they are represented
528 * with the same masks in the DDPF header. */
529 av_log(avctx, AV_LOG_DEBUG, "Post-processing raw YCoCg.\n");
531 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
532 uint8_t *src = frame->data[0] + i;
534 int cg = src[1] - 128;
535 int co = src[2] - 128;
538 src[0] = av_clip_uint8(y + co - cg);
539 src[1] = av_clip_uint8(y + cg);
540 src[2] = av_clip_uint8(y - co - cg);
544 case DDS_SWIZZLE_A2XY:
545 /* Swap R and G, often used to restore a standard RGTC2. */
546 av_log(avctx, AV_LOG_DEBUG, "Post-processing A2XY swizzle.\n");
547 do_swizzle(frame, 0, 1);
549 case DDS_SWIZZLE_RBXG:
550 /* Swap G and A, then B and new A (G). */
551 av_log(avctx, AV_LOG_DEBUG, "Post-processing RBXG swizzle.\n");
552 do_swizzle(frame, 1, 3);
553 do_swizzle(frame, 2, 3);
555 case DDS_SWIZZLE_RGXB:
557 av_log(avctx, AV_LOG_DEBUG, "Post-processing RGXB swizzle.\n");
558 do_swizzle(frame, 2, 3);
560 case DDS_SWIZZLE_RXBG:
562 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXBG swizzle.\n");
563 do_swizzle(frame, 1, 3);
565 case DDS_SWIZZLE_RXGB:
566 /* Swap R and A (misleading name). */
567 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXGB swizzle.\n");
568 do_swizzle(frame, 0, 3);
570 case DDS_SWIZZLE_XGBR:
571 /* Swap B and A, then R and new A (B). */
572 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGBR swizzle.\n");
573 do_swizzle(frame, 2, 3);
574 do_swizzle(frame, 0, 3);
576 case DDS_SWIZZLE_XGXR:
577 /* Swap G and A, then R and new A (G), then new R (G) and new G (A).
578 * This variant does not store any B component. */
579 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGXR swizzle.\n");
580 do_swizzle(frame, 1, 3);
581 do_swizzle(frame, 0, 3);
582 do_swizzle(frame, 0, 1);
584 case DDS_SWIZZLE_XRBG:
585 /* Swap G and A, then R and new A (G). */
586 av_log(avctx, AV_LOG_DEBUG, "Post-processing XRBG swizzle.\n");
587 do_swizzle(frame, 1, 3);
588 do_swizzle(frame, 0, 3);
593 static int dds_decode(AVCodecContext *avctx, void *data,
594 int *got_frame, AVPacket *avpkt)
596 DDSContext *ctx = avctx->priv_data;
597 GetByteContext *gbc = &ctx->gbc;
598 AVFrame *frame = data;
602 ff_texturedsp_init(&ctx->texdsp);
603 bytestream2_init(gbc, avpkt->data, avpkt->size);
605 if (bytestream2_get_bytes_left(gbc) < 128) {
606 av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n",
607 bytestream2_get_bytes_left(gbc));
608 return AVERROR_INVALIDDATA;
611 if (bytestream2_get_le32(gbc) != MKTAG('D', 'D', 'S', ' ') ||
612 bytestream2_get_le32(gbc) != 124) { // header size
613 av_log(avctx, AV_LOG_ERROR, "Invalid DDS header.\n");
614 return AVERROR_INVALIDDATA;
617 bytestream2_skip(gbc, 4); // flags
619 avctx->height = bytestream2_get_le32(gbc);
620 avctx->width = bytestream2_get_le32(gbc);
621 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
623 av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
624 avctx->width, avctx->height);
628 /* Since codec is based on 4x4 blocks, size is aligned to 4. */
629 avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
630 avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
632 bytestream2_skip(gbc, 4); // pitch
633 bytestream2_skip(gbc, 4); // depth
634 mipmap = bytestream2_get_le32(gbc);
636 av_log(avctx, AV_LOG_VERBOSE, "Found %d mipmaps (ignored).\n", mipmap);
638 /* Extract pixel format information, considering additional elements
639 * in reserved1 and reserved2. */
640 ret = parse_pixel_format(avctx);
644 ret = ff_get_buffer(avctx, frame, 0);
648 if (ctx->compressed) {
649 int size = (avctx->coded_height / TEXTURE_BLOCK_H) *
650 (avctx->coded_width / TEXTURE_BLOCK_W) * ctx->tex_ratio;
651 ctx->slice_count = av_clip(avctx->thread_count, 1,
652 avctx->coded_height / TEXTURE_BLOCK_H);
654 if (bytestream2_get_bytes_left(gbc) < size) {
655 av_log(avctx, AV_LOG_ERROR,
656 "Compressed Buffer is too small (%d < %d).\n",
657 bytestream2_get_bytes_left(gbc), size);
658 return AVERROR_INVALIDDATA;
661 /* Use the decompress function on the texture, one block per thread. */
662 ctx->tex_data = gbc->buffer;
663 avctx->execute2(avctx, decompress_texture_thread, frame, NULL, ctx->slice_count);
665 int linesize = av_image_get_linesize(avctx->pix_fmt, frame->width, 0);
669 uint32_t *p = (uint32_t*) frame->data[1];
671 /* Use the first 1024 bytes as palette, then copy the rest. */
672 for (i = 0; i < 256; i++) {
674 rgba |= bytestream2_get_byte(gbc) << 16;
675 rgba |= bytestream2_get_byte(gbc) << 8;
676 rgba |= bytestream2_get_byte(gbc) << 0;
677 rgba |= bytestream2_get_byte(gbc) << 24;
681 frame->palette_has_changed = 1;
684 if (bytestream2_get_bytes_left(gbc) < frame->height * linesize) {
685 av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
686 bytestream2_get_bytes_left(gbc), frame->height * linesize);
687 return AVERROR_INVALIDDATA;
690 av_image_copy_plane(frame->data[0], frame->linesize[0],
691 gbc->buffer, linesize,
692 linesize, frame->height);
695 /* Run any post processing here if needed. */
696 if (ctx->postproc != DDS_NONE)
697 run_postproc(avctx, frame);
699 /* Frame is ready to be output. */
700 frame->pict_type = AV_PICTURE_TYPE_I;
701 frame->key_frame = 1;
707 AVCodec ff_dds_decoder = {
709 .long_name = NULL_IF_CONFIG_SMALL("DirectDraw Surface image decoder"),
710 .type = AVMEDIA_TYPE_VIDEO,
711 .id = AV_CODEC_ID_DDS,
712 .decode = dds_decode,
713 .priv_data_size = sizeof(DDSContext),
714 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
715 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE