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;
105 enum DDSPostProc postproc;
107 const uint8_t *tex_data; // Compressed texture
108 int tex_ratio; // Compression ratio
109 int slice_count; // Number of slices for threaded operations
111 /* Pointer to the selected compress or decompress function. */
112 int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
115 static int parse_pixel_format(AVCodecContext *avctx)
117 DDSContext *ctx = avctx->priv_data;
118 GetByteContext *gbc = &ctx->gbc;
120 uint32_t flags, fourcc, gimp_tag;
121 enum DDSDXGIFormat dxgi;
122 int size, bpp, r, g, b, a;
123 int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array;
125 /* Alternative DDS implementations use reserved1 as custom header. */
126 bytestream2_skip(gbc, 4 * 3);
127 gimp_tag = bytestream2_get_le32(gbc);
128 alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P');
129 ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1');
130 ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2');
131 bytestream2_skip(gbc, 4 * 7);
133 /* Now the real DDPF starts. */
134 size = bytestream2_get_le32(gbc);
136 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size);
137 return AVERROR_INVALIDDATA;
139 flags = bytestream2_get_le32(gbc);
140 ctx->compressed = flags & DDPF_FOURCC;
141 ctx->paletted = flags & DDPF_PALETTE;
142 normal_map = flags & DDPF_NORMALMAP;
143 fourcc = bytestream2_get_le32(gbc);
145 if (ctx->compressed && ctx->paletted) {
146 av_log(avctx, AV_LOG_WARNING,
147 "Disabling invalid palette flag for compressed dds.\n");
151 bpp = bytestream2_get_le32(gbc); // rgbbitcount
152 r = bytestream2_get_le32(gbc); // rbitmask
153 g = bytestream2_get_le32(gbc); // gbitmask
154 b = bytestream2_get_le32(gbc); // bbitmask
155 a = bytestream2_get_le32(gbc); // abitmask
157 bytestream2_skip(gbc, 4); // caps
158 bytestream2_skip(gbc, 4); // caps2
159 bytestream2_skip(gbc, 4); // caps3
160 bytestream2_skip(gbc, 4); // caps4
161 bytestream2_skip(gbc, 4); // reserved2
163 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
164 av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d "
165 "r 0x%x g 0x%x b 0x%x a 0x%x\n", buf, bpp, r, g, b, a);
167 av_get_codec_tag_string(buf, sizeof(buf), gimp_tag);
168 av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", buf);
172 avctx->pix_fmt = AV_PIX_FMT_RGBA;
174 if (ctx->compressed) {
176 case MKTAG('D', 'X', 'T', '1'):
178 ctx->tex_funct = ctx->texdsp.dxt1a_block;
180 case MKTAG('D', 'X', 'T', '2'):
182 ctx->tex_funct = ctx->texdsp.dxt2_block;
184 case MKTAG('D', 'X', 'T', '3'):
186 ctx->tex_funct = ctx->texdsp.dxt3_block;
188 case MKTAG('D', 'X', 'T', '4'):
190 ctx->tex_funct = ctx->texdsp.dxt4_block;
192 case MKTAG('D', 'X', 'T', '5'):
195 ctx->tex_funct = ctx->texdsp.dxt5ys_block;
196 else if (ycocg_classic)
197 ctx->tex_funct = ctx->texdsp.dxt5y_block;
199 ctx->tex_funct = ctx->texdsp.dxt5_block;
201 case MKTAG('R', 'X', 'G', 'B'):
203 ctx->tex_funct = ctx->texdsp.dxt5_block;
204 /* This format may be considered as a normal map,
205 * but it is handled differently in a separate postproc. */
206 ctx->postproc = DDS_SWIZZLE_RXGB;
209 case MKTAG('A', 'T', 'I', '1'):
210 case MKTAG('B', 'C', '4', 'U'):
212 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
214 case MKTAG('B', 'C', '4', 'S'):
216 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
218 case MKTAG('A', 'T', 'I', '2'):
219 /* RGT2 variant with swapped R and G (3Dc)*/
221 ctx->tex_funct = ctx->texdsp.dxn3dc_block;
223 case MKTAG('B', 'C', '5', 'U'):
225 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
227 case MKTAG('B', 'C', '5', 'S'):
229 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
231 case MKTAG('U', 'Y', 'V', 'Y'):
233 avctx->pix_fmt = AV_PIX_FMT_UYVY422;
235 case MKTAG('Y', 'U', 'Y', '2'):
237 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
239 case MKTAG('P', '8', ' ', ' '):
240 /* ATI Palette8, same as normal palette */
243 avctx->pix_fmt = AV_PIX_FMT_PAL8;
245 case MKTAG('D', 'X', '1', '0'):
246 /* DirectX 10 extra header */
247 dxgi = bytestream2_get_le32(gbc);
248 bytestream2_skip(gbc, 4); // resourceDimension
249 bytestream2_skip(gbc, 4); // miscFlag
250 array = bytestream2_get_le32(gbc);
251 bytestream2_skip(gbc, 4); // miscFlag2
254 av_log(avctx, AV_LOG_VERBOSE,
255 "Found array of size %d (ignored).\n", array);
257 /* Only BC[1-5] are actually compressed. */
258 ctx->compressed = (dxgi >= 70) && (dxgi <= 84);
260 av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi);
263 case DXGI_FORMAT_R16G16B16A16_TYPELESS:
264 case DXGI_FORMAT_R16G16B16A16_FLOAT:
265 case DXGI_FORMAT_R16G16B16A16_UNORM:
266 case DXGI_FORMAT_R16G16B16A16_UINT:
267 case DXGI_FORMAT_R16G16B16A16_SNORM:
268 case DXGI_FORMAT_R16G16B16A16_SINT:
269 avctx->pix_fmt = AV_PIX_FMT_BGRA64;
271 case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
272 avctx->colorspace = AVCOL_SPC_RGB;
273 case DXGI_FORMAT_R8G8B8A8_TYPELESS:
274 case DXGI_FORMAT_R8G8B8A8_UNORM:
275 case DXGI_FORMAT_R8G8B8A8_UINT:
276 case DXGI_FORMAT_R8G8B8A8_SNORM:
277 case DXGI_FORMAT_R8G8B8A8_SINT:
278 avctx->pix_fmt = AV_PIX_FMT_BGRA;
280 case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
281 avctx->colorspace = AVCOL_SPC_RGB;
282 case DXGI_FORMAT_B8G8R8A8_TYPELESS:
283 case DXGI_FORMAT_B8G8R8A8_UNORM:
284 avctx->pix_fmt = AV_PIX_FMT_RGBA;
286 case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
287 avctx->colorspace = AVCOL_SPC_RGB;
288 case DXGI_FORMAT_B8G8R8X8_TYPELESS:
289 case DXGI_FORMAT_B8G8R8X8_UNORM:
290 avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
292 case DXGI_FORMAT_B5G6R5_UNORM:
293 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
296 case DXGI_FORMAT_BC1_UNORM_SRGB:
297 avctx->colorspace = AVCOL_SPC_RGB;
298 case DXGI_FORMAT_BC1_TYPELESS:
299 case DXGI_FORMAT_BC1_UNORM:
301 ctx->tex_funct = ctx->texdsp.dxt1a_block;
303 case DXGI_FORMAT_BC2_UNORM_SRGB:
304 avctx->colorspace = AVCOL_SPC_RGB;
305 case DXGI_FORMAT_BC2_TYPELESS:
306 case DXGI_FORMAT_BC2_UNORM:
308 ctx->tex_funct = ctx->texdsp.dxt3_block;
310 case DXGI_FORMAT_BC3_UNORM_SRGB:
311 avctx->colorspace = AVCOL_SPC_RGB;
312 case DXGI_FORMAT_BC3_TYPELESS:
313 case DXGI_FORMAT_BC3_UNORM:
315 ctx->tex_funct = ctx->texdsp.dxt5_block;
317 case DXGI_FORMAT_BC4_TYPELESS:
318 case DXGI_FORMAT_BC4_UNORM:
320 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
322 case DXGI_FORMAT_BC4_SNORM:
324 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
326 case DXGI_FORMAT_BC5_TYPELESS:
327 case DXGI_FORMAT_BC5_UNORM:
329 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
331 case DXGI_FORMAT_BC5_SNORM:
333 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
336 av_log(avctx, AV_LOG_ERROR,
337 "Unsupported DXGI format %d.\n", dxgi);
338 return AVERROR_INVALIDDATA;
342 av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", buf);
343 return AVERROR_INVALIDDATA;
345 } else if (ctx->paletted) {
347 avctx->pix_fmt = AV_PIX_FMT_PAL8;
349 av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp);
350 return AVERROR_INVALIDDATA;
354 if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0)
355 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
357 else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00)
358 avctx->pix_fmt = AV_PIX_FMT_YA8;
359 else if (bpp == 16 && r == 0xff00 && g == 0 && b == 0 && a == 0xff) {
360 avctx->pix_fmt = AV_PIX_FMT_YA8;
361 ctx->postproc = DDS_SWAP_ALPHA;
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 == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0)
366 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
368 else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
369 avctx->pix_fmt = AV_PIX_FMT_BGR24;
371 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
372 avctx->pix_fmt = AV_PIX_FMT_BGR0; // opaque
373 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0)
374 avctx->pix_fmt = AV_PIX_FMT_RGB0; // opaque
375 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000)
376 avctx->pix_fmt = AV_PIX_FMT_BGRA;
377 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000)
378 avctx->pix_fmt = AV_PIX_FMT_RGBA;
381 av_log(avctx, AV_LOG_ERROR, "Unknown pixel format "
382 "[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a);
383 return AVERROR_INVALIDDATA;
387 /* Set any remaining post-proc that should happen before frame is ready. */
389 ctx->postproc = DDS_ALPHA_EXP;
391 ctx->postproc = DDS_NORMAL_MAP;
392 else if (ycocg_classic && !ctx->compressed)
393 ctx->postproc = DDS_RAW_YCOCG;
395 /* ATI/NVidia variants sometimes add swizzling in bpp. */
397 case MKTAG('A', '2', 'X', 'Y'):
398 ctx->postproc = DDS_SWIZZLE_A2XY;
400 case MKTAG('x', 'G', 'B', 'R'):
401 ctx->postproc = DDS_SWIZZLE_XGBR;
403 case MKTAG('x', 'R', 'B', 'G'):
404 ctx->postproc = DDS_SWIZZLE_XRBG;
406 case MKTAG('R', 'B', 'x', 'G'):
407 ctx->postproc = DDS_SWIZZLE_RBXG;
409 case MKTAG('R', 'G', 'x', 'B'):
410 ctx->postproc = DDS_SWIZZLE_RGXB;
412 case MKTAG('R', 'x', 'B', 'G'):
413 ctx->postproc = DDS_SWIZZLE_RXBG;
415 case MKTAG('x', 'G', 'x', 'R'):
416 ctx->postproc = DDS_SWIZZLE_XGXR;
418 case MKTAG('A', '2', 'D', '5'):
419 ctx->postproc = DDS_NORMAL_MAP;
426 static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
427 int slice, int thread_nb)
429 DDSContext *ctx = avctx->priv_data;
430 AVFrame *frame = arg;
431 const uint8_t *d = ctx->tex_data;
432 int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
433 int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
435 int start_slice, end_slice;
436 int base_blocks_per_slice = h_block / ctx->slice_count;
437 int remainder_blocks = h_block % ctx->slice_count;
439 /* When the frame height (in blocks) doesn't divide evenly between the
440 * number of slices, spread the remaining blocks evenly between the first
442 start_slice = slice * base_blocks_per_slice;
443 /* Add any extra blocks (one per slice) that have been added before this slice */
444 start_slice += FFMIN(slice, remainder_blocks);
446 end_slice = start_slice + base_blocks_per_slice;
447 /* Add an extra block if there are still remainder blocks to be accounted for */
448 if (slice < remainder_blocks)
451 for (y = start_slice; y < end_slice; y++) {
452 uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
453 int off = y * w_block;
454 for (x = 0; x < w_block; x++) {
455 ctx->tex_funct(p + x * 16, frame->linesize[0],
456 d + (off + x) * ctx->tex_ratio);
463 static void do_swizzle(AVFrame *frame, int x, int y)
466 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
467 uint8_t *src = frame->data[0] + i;
468 FFSWAP(uint8_t, src[x], src[y]);
472 static void run_postproc(AVCodecContext *avctx, AVFrame *frame)
474 DDSContext *ctx = avctx->priv_data;
477 switch (ctx->postproc) {
479 /* Alpha-exponential mode divides each channel by the maximum
480 * R, G or B value, and stores the multiplying factor in the
482 av_log(avctx, AV_LOG_DEBUG, "Post-processing alpha exponent.\n");
484 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
485 uint8_t *src = frame->data[0] + i;
491 src[0] = r * a / 255;
492 src[1] = g * a / 255;
493 src[2] = b * a / 255;
498 /* Normal maps work in the XYZ color space and they encode
499 * X in R or in A, depending on the texture type, Y in G and
500 * derive Z with a square root of the distance.
502 * http://www.realtimecollisiondetection.net/blog/?p=28 */
503 av_log(avctx, AV_LOG_DEBUG, "Post-processing normal map.\n");
505 x_off = ctx->tex_ratio == 8 ? 0 : 3;
506 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
507 uint8_t *src = frame->data[0] + i;
512 int d = (255 * 255 - x * x - y * y) / 2;
523 /* Data is Y-Co-Cg-A and not RGBA, but they are represented
524 * with the same masks in the DDPF header. */
525 av_log(avctx, AV_LOG_DEBUG, "Post-processing raw YCoCg.\n");
527 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
528 uint8_t *src = frame->data[0] + i;
530 int cg = src[1] - 128;
531 int co = src[2] - 128;
534 src[0] = av_clip_uint8(y + co - cg);
535 src[1] = av_clip_uint8(y + cg);
536 src[2] = av_clip_uint8(y - co - cg);
541 /* Alpha and Luma are stored swapped. */
542 av_log(avctx, AV_LOG_DEBUG, "Post-processing swapped Luma/Alpha.\n");
544 for (i = 0; i < frame->linesize[0] * frame->height; i += 2) {
545 uint8_t *src = frame->data[0] + i;
546 FFSWAP(uint8_t, src[0], src[1]);
549 case DDS_SWIZZLE_A2XY:
550 /* Swap R and G, often used to restore a standard RGTC2. */
551 av_log(avctx, AV_LOG_DEBUG, "Post-processing A2XY swizzle.\n");
552 do_swizzle(frame, 0, 1);
554 case DDS_SWIZZLE_RBXG:
555 /* Swap G and A, then B and new A (G). */
556 av_log(avctx, AV_LOG_DEBUG, "Post-processing RBXG swizzle.\n");
557 do_swizzle(frame, 1, 3);
558 do_swizzle(frame, 2, 3);
560 case DDS_SWIZZLE_RGXB:
562 av_log(avctx, AV_LOG_DEBUG, "Post-processing RGXB swizzle.\n");
563 do_swizzle(frame, 2, 3);
565 case DDS_SWIZZLE_RXBG:
567 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXBG swizzle.\n");
568 do_swizzle(frame, 1, 3);
570 case DDS_SWIZZLE_RXGB:
571 /* Swap R and A (misleading name). */
572 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXGB swizzle.\n");
573 do_swizzle(frame, 0, 3);
575 case DDS_SWIZZLE_XGBR:
576 /* Swap B and A, then R and new A (B). */
577 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGBR swizzle.\n");
578 do_swizzle(frame, 2, 3);
579 do_swizzle(frame, 0, 3);
581 case DDS_SWIZZLE_XGXR:
582 /* Swap G and A, then R and new A (G), then new R (G) and new G (A).
583 * This variant does not store any B component. */
584 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGXR swizzle.\n");
585 do_swizzle(frame, 1, 3);
586 do_swizzle(frame, 0, 3);
587 do_swizzle(frame, 0, 1);
589 case DDS_SWIZZLE_XRBG:
590 /* Swap G and A, then R and new A (G). */
591 av_log(avctx, AV_LOG_DEBUG, "Post-processing XRBG swizzle.\n");
592 do_swizzle(frame, 1, 3);
593 do_swizzle(frame, 0, 3);
598 static int dds_decode(AVCodecContext *avctx, void *data,
599 int *got_frame, AVPacket *avpkt)
601 DDSContext *ctx = avctx->priv_data;
602 GetByteContext *gbc = &ctx->gbc;
603 AVFrame *frame = data;
607 ff_texturedsp_init(&ctx->texdsp);
608 bytestream2_init(gbc, avpkt->data, avpkt->size);
610 if (bytestream2_get_bytes_left(gbc) < 128) {
611 av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n",
612 bytestream2_get_bytes_left(gbc));
613 return AVERROR_INVALIDDATA;
616 if (bytestream2_get_le32(gbc) != MKTAG('D', 'D', 'S', ' ') ||
617 bytestream2_get_le32(gbc) != 124) { // header size
618 av_log(avctx, AV_LOG_ERROR, "Invalid DDS header.\n");
619 return AVERROR_INVALIDDATA;
622 bytestream2_skip(gbc, 4); // flags
624 avctx->height = bytestream2_get_le32(gbc);
625 avctx->width = bytestream2_get_le32(gbc);
626 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
628 av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
629 avctx->width, avctx->height);
633 /* Since codec is based on 4x4 blocks, size is aligned to 4. */
634 avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
635 avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
637 bytestream2_skip(gbc, 4); // pitch
638 bytestream2_skip(gbc, 4); // depth
639 mipmap = bytestream2_get_le32(gbc);
641 av_log(avctx, AV_LOG_VERBOSE, "Found %d mipmaps (ignored).\n", mipmap);
643 /* Extract pixel format information, considering additional elements
644 * in reserved1 and reserved2. */
645 ret = parse_pixel_format(avctx);
649 ret = ff_get_buffer(avctx, frame, 0);
653 if (ctx->compressed) {
654 int size = (avctx->coded_height / TEXTURE_BLOCK_H) *
655 (avctx->coded_width / TEXTURE_BLOCK_W) * ctx->tex_ratio;
656 ctx->slice_count = av_clip(avctx->thread_count, 1,
657 avctx->coded_height / TEXTURE_BLOCK_H);
659 if (bytestream2_get_bytes_left(gbc) < size) {
660 av_log(avctx, AV_LOG_ERROR,
661 "Compressed Buffer is too small (%d < %d).\n",
662 bytestream2_get_bytes_left(gbc), size);
663 return AVERROR_INVALIDDATA;
666 /* Use the decompress function on the texture, one block per thread. */
667 ctx->tex_data = gbc->buffer;
668 avctx->execute2(avctx, decompress_texture_thread, frame, NULL, ctx->slice_count);
670 int linesize = av_image_get_linesize(avctx->pix_fmt, frame->width, 0);
674 /* Use the first 1024 bytes as palette, then copy the rest. */
675 bytestream2_get_buffer(gbc, frame->data[1], 256 * 4);
676 for (i = 0; i < 256; i++)
677 AV_WN32(frame->data[1] + i*4,
678 (frame->data[1][2+i*4]<<0)+
679 (frame->data[1][1+i*4]<<8)+
680 (frame->data[1][0+i*4]<<16)+
681 (frame->data[1][3+i*4]<<24)
684 frame->palette_has_changed = 1;
687 if (bytestream2_get_bytes_left(gbc) < frame->height * linesize) {
688 av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
689 bytestream2_get_bytes_left(gbc), frame->height * linesize);
690 return AVERROR_INVALIDDATA;
693 av_image_copy_plane(frame->data[0], frame->linesize[0],
694 gbc->buffer, linesize,
695 linesize, frame->height);
698 /* Run any post processing here if needed. */
699 if (avctx->pix_fmt == AV_PIX_FMT_BGRA ||
700 avctx->pix_fmt == AV_PIX_FMT_RGBA ||
701 avctx->pix_fmt == AV_PIX_FMT_RGB0 ||
702 avctx->pix_fmt == AV_PIX_FMT_BGR0 ||
703 avctx->pix_fmt == AV_PIX_FMT_YA8)
704 run_postproc(avctx, frame);
706 /* Frame is ready to be output. */
707 frame->pict_type = AV_PICTURE_TYPE_I;
708 frame->key_frame = 1;
714 AVCodec ff_dds_decoder = {
716 .long_name = NULL_IF_CONFIG_SMALL("DirectDraw Surface image decoder"),
717 .type = AVMEDIA_TYPE_VIDEO,
718 .id = AV_CODEC_ID_DDS,
719 .decode = dds_decode,
720 .priv_data_size = sizeof(DDSContext),
721 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
722 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE