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/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)
60 DXGI_FORMAT_R16G16B16A16_TYPELESS = 9,
61 DXGI_FORMAT_R16G16B16A16_FLOAT = 10,
62 DXGI_FORMAT_R16G16B16A16_UNORM = 11,
63 DXGI_FORMAT_R16G16B16A16_UINT = 12,
64 DXGI_FORMAT_R16G16B16A16_SNORM = 13,
65 DXGI_FORMAT_R16G16B16A16_SINT = 14,
67 DXGI_FORMAT_R8G8B8A8_TYPELESS = 27,
68 DXGI_FORMAT_R8G8B8A8_UNORM = 28,
69 DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29,
70 DXGI_FORMAT_R8G8B8A8_UINT = 30,
71 DXGI_FORMAT_R8G8B8A8_SNORM = 31,
72 DXGI_FORMAT_R8G8B8A8_SINT = 32,
74 DXGI_FORMAT_BC1_TYPELESS = 70,
75 DXGI_FORMAT_BC1_UNORM = 71,
76 DXGI_FORMAT_BC1_UNORM_SRGB = 72,
77 DXGI_FORMAT_BC2_TYPELESS = 73,
78 DXGI_FORMAT_BC2_UNORM = 74,
79 DXGI_FORMAT_BC2_UNORM_SRGB = 75,
80 DXGI_FORMAT_BC3_TYPELESS = 76,
81 DXGI_FORMAT_BC3_UNORM = 77,
82 DXGI_FORMAT_BC3_UNORM_SRGB = 78,
83 DXGI_FORMAT_BC4_TYPELESS = 79,
84 DXGI_FORMAT_BC4_UNORM = 80,
85 DXGI_FORMAT_BC4_SNORM = 81,
86 DXGI_FORMAT_BC5_TYPELESS = 82,
87 DXGI_FORMAT_BC5_UNORM = 83,
88 DXGI_FORMAT_BC5_SNORM = 84,
89 DXGI_FORMAT_B5G6R5_UNORM = 85,
90 DXGI_FORMAT_B8G8R8A8_UNORM = 87,
91 DXGI_FORMAT_B8G8R8X8_UNORM = 88,
92 DXGI_FORMAT_B8G8R8A8_TYPELESS = 90,
93 DXGI_FORMAT_B8G8R8A8_UNORM_SRGB = 91,
94 DXGI_FORMAT_B8G8R8X8_TYPELESS = 92,
95 DXGI_FORMAT_B8G8R8X8_UNORM_SRGB = 93,
98 typedef struct DDSContext {
99 TextureDSPContext texdsp;
104 enum DDSPostProc postproc;
106 const uint8_t *tex_data; // Compressed texture
107 int tex_ratio; // Compression ratio
108 int slice_count; // Number of slices for threaded operations
110 /* Pointer to the selected compress or decompress function. */
111 int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
114 static int parse_pixel_format(AVCodecContext *avctx)
116 DDSContext *ctx = avctx->priv_data;
117 GetByteContext *gbc = &ctx->gbc;
119 uint32_t flags, fourcc, gimp_tag;
120 enum DDSDXGIFormat dxgi;
121 int size, bpp, r, g, b, a;
122 int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array;
124 /* Alternative DDS implementations use reserved1 as custom header. */
125 bytestream2_skip(gbc, 4 * 3);
126 gimp_tag = bytestream2_get_le32(gbc);
127 alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P');
128 ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1');
129 ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2');
130 bytestream2_skip(gbc, 4 * 7);
132 /* Now the real DDPF starts. */
133 size = bytestream2_get_le32(gbc);
135 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size);
136 return AVERROR_INVALIDDATA;
138 flags = bytestream2_get_le32(gbc);
139 ctx->compressed = flags & DDPF_FOURCC;
140 ctx->paletted = flags & DDPF_PALETTE;
141 normal_map = flags & DDPF_NORMALMAP;
142 fourcc = bytestream2_get_le32(gbc);
144 if (ctx->compressed && ctx->paletted) {
145 av_log(avctx, AV_LOG_WARNING,
146 "Disabling invalid palette flag for compressed dds.\n");
150 bpp = bytestream2_get_le32(gbc); // rgbbitcount
151 r = bytestream2_get_le32(gbc); // rbitmask
152 g = bytestream2_get_le32(gbc); // gbitmask
153 b = bytestream2_get_le32(gbc); // bbitmask
154 a = bytestream2_get_le32(gbc); // abitmask
156 bytestream2_skip(gbc, 4); // caps
157 bytestream2_skip(gbc, 4); // caps2
158 bytestream2_skip(gbc, 4); // caps3
159 bytestream2_skip(gbc, 4); // caps4
160 bytestream2_skip(gbc, 4); // reserved2
162 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
163 av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d "
164 "r 0x%x g 0x%x b 0x%x a 0x%x\n", buf, bpp, r, g, b, a);
166 av_get_codec_tag_string(buf, sizeof(buf), gimp_tag);
167 av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", buf);
171 avctx->pix_fmt = AV_PIX_FMT_RGBA;
173 if (ctx->compressed) {
175 case MKTAG('D', 'X', 'T', '1'):
177 ctx->tex_funct = ctx->texdsp.dxt1a_block;
179 case MKTAG('D', 'X', 'T', '2'):
181 ctx->tex_funct = ctx->texdsp.dxt2_block;
183 case MKTAG('D', 'X', 'T', '3'):
185 ctx->tex_funct = ctx->texdsp.dxt3_block;
187 case MKTAG('D', 'X', 'T', '4'):
189 ctx->tex_funct = ctx->texdsp.dxt4_block;
191 case MKTAG('D', 'X', 'T', '5'):
194 ctx->tex_funct = ctx->texdsp.dxt5ys_block;
195 else if (ycocg_classic)
196 ctx->tex_funct = ctx->texdsp.dxt5y_block;
198 ctx->tex_funct = ctx->texdsp.dxt5_block;
200 case MKTAG('R', 'X', 'G', 'B'):
202 ctx->tex_funct = ctx->texdsp.dxt5_block;
203 /* This format may be considered as a normal map,
204 * but it is handled differently in a separate postproc. */
205 ctx->postproc = DDS_SWIZZLE_RXGB;
208 case MKTAG('A', 'T', 'I', '1'):
209 case MKTAG('B', 'C', '4', 'U'):
211 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
213 case MKTAG('B', 'C', '4', 'S'):
215 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
217 case MKTAG('A', 'T', 'I', '2'):
218 /* RGT2 variant with swapped R and G (3Dc)*/
220 ctx->tex_funct = ctx->texdsp.dxn3dc_block;
222 case MKTAG('B', 'C', '5', 'U'):
224 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
226 case MKTAG('B', 'C', '5', 'S'):
228 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
230 case MKTAG('U', 'Y', 'V', 'Y'):
232 avctx->pix_fmt = AV_PIX_FMT_UYVY422;
234 case MKTAG('Y', 'U', 'Y', '2'):
236 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
238 case MKTAG('P', '8', ' ', ' '):
239 /* ATI Palette8, same as normal palette */
242 avctx->pix_fmt = AV_PIX_FMT_PAL8;
244 case MKTAG('D', 'X', '1', '0'):
245 /* DirectX 10 extra header */
246 dxgi = bytestream2_get_le32(gbc);
247 bytestream2_skip(gbc, 4); // resourceDimension
248 bytestream2_skip(gbc, 4); // miscFlag
249 array = bytestream2_get_le32(gbc);
250 bytestream2_skip(gbc, 4); // miscFlag2
253 av_log(avctx, AV_LOG_VERBOSE,
254 "Found array of size %d (ignored).\n", array);
256 /* Only BC[1-5] are actually compressed. */
257 ctx->compressed = (dxgi >= 70) && (dxgi <= 84);
259 av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi);
262 case DXGI_FORMAT_R16G16B16A16_TYPELESS:
263 case DXGI_FORMAT_R16G16B16A16_FLOAT:
264 case DXGI_FORMAT_R16G16B16A16_UNORM:
265 case DXGI_FORMAT_R16G16B16A16_UINT:
266 case DXGI_FORMAT_R16G16B16A16_SNORM:
267 case DXGI_FORMAT_R16G16B16A16_SINT:
268 avctx->pix_fmt = AV_PIX_FMT_BGRA64;
270 case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
271 avctx->colorspace = AVCOL_SPC_RGB;
272 case DXGI_FORMAT_R8G8B8A8_TYPELESS:
273 case DXGI_FORMAT_R8G8B8A8_UNORM:
274 case DXGI_FORMAT_R8G8B8A8_UINT:
275 case DXGI_FORMAT_R8G8B8A8_SNORM:
276 case DXGI_FORMAT_R8G8B8A8_SINT:
277 avctx->pix_fmt = AV_PIX_FMT_BGRA;
279 case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
280 avctx->colorspace = AVCOL_SPC_RGB;
281 case DXGI_FORMAT_B8G8R8A8_TYPELESS:
282 case DXGI_FORMAT_B8G8R8A8_UNORM:
283 avctx->pix_fmt = AV_PIX_FMT_RGBA;
285 case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
286 avctx->colorspace = AVCOL_SPC_RGB;
287 case DXGI_FORMAT_B8G8R8X8_TYPELESS:
288 case DXGI_FORMAT_B8G8R8X8_UNORM:
289 avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
291 case DXGI_FORMAT_B5G6R5_UNORM:
292 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
295 case DXGI_FORMAT_BC1_UNORM_SRGB:
296 avctx->colorspace = AVCOL_SPC_RGB;
297 case DXGI_FORMAT_BC1_TYPELESS:
298 case DXGI_FORMAT_BC1_UNORM:
300 ctx->tex_funct = ctx->texdsp.dxt1a_block;
302 case DXGI_FORMAT_BC2_UNORM_SRGB:
303 avctx->colorspace = AVCOL_SPC_RGB;
304 case DXGI_FORMAT_BC2_TYPELESS:
305 case DXGI_FORMAT_BC2_UNORM:
307 ctx->tex_funct = ctx->texdsp.dxt3_block;
309 case DXGI_FORMAT_BC3_UNORM_SRGB:
310 avctx->colorspace = AVCOL_SPC_RGB;
311 case DXGI_FORMAT_BC3_TYPELESS:
312 case DXGI_FORMAT_BC3_UNORM:
314 ctx->tex_funct = ctx->texdsp.dxt5_block;
316 case DXGI_FORMAT_BC4_TYPELESS:
317 case DXGI_FORMAT_BC4_UNORM:
319 ctx->tex_funct = ctx->texdsp.rgtc1u_block;
321 case DXGI_FORMAT_BC4_SNORM:
323 ctx->tex_funct = ctx->texdsp.rgtc1s_block;
325 case DXGI_FORMAT_BC5_TYPELESS:
326 case DXGI_FORMAT_BC5_UNORM:
328 ctx->tex_funct = ctx->texdsp.rgtc2u_block;
330 case DXGI_FORMAT_BC5_SNORM:
332 ctx->tex_funct = ctx->texdsp.rgtc2s_block;
335 av_log(avctx, AV_LOG_ERROR,
336 "Unsupported DXGI format %d.\n", dxgi);
337 return AVERROR_INVALIDDATA;
341 av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", buf);
342 return AVERROR_INVALIDDATA;
344 } else if (ctx->paletted) {
346 avctx->pix_fmt = AV_PIX_FMT_PAL8;
348 av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp);
349 return AVERROR_INVALIDDATA;
353 if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0)
354 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
356 else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00)
357 avctx->pix_fmt = AV_PIX_FMT_YA8;
358 else if (bpp == 16 && r == 0xffff && g == 0 && b == 0 && a == 0)
359 avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
360 else if (bpp == 16 && r == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0)
361 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
363 else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
364 avctx->pix_fmt = AV_PIX_FMT_BGR24;
366 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
367 avctx->pix_fmt = AV_PIX_FMT_BGR0; // opaque
368 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0)
369 avctx->pix_fmt = AV_PIX_FMT_RGB0; // opaque
370 else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000)
371 avctx->pix_fmt = AV_PIX_FMT_BGRA;
372 else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000)
373 avctx->pix_fmt = AV_PIX_FMT_RGBA;
376 av_log(avctx, AV_LOG_ERROR, "Unknown pixel format "
377 "[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a);
378 return AVERROR_INVALIDDATA;
382 /* Set any remaining post-proc that should happen before frame is ready. */
384 ctx->postproc = DDS_ALPHA_EXP;
386 ctx->postproc = DDS_NORMAL_MAP;
387 else if (ycocg_classic && !ctx->compressed)
388 ctx->postproc = DDS_RAW_YCOCG;
389 else if (avctx->pix_fmt == AV_PIX_FMT_YA8)
390 ctx->postproc = DDS_SWAP_ALPHA;
392 /* ATI/NVidia variants sometimes add swizzling in bpp. */
394 case MKTAG('A', '2', 'X', 'Y'):
395 ctx->postproc = DDS_SWIZZLE_A2XY;
397 case MKTAG('x', 'G', 'B', 'R'):
398 ctx->postproc = DDS_SWIZZLE_XGBR;
400 case MKTAG('x', 'R', 'B', 'G'):
401 ctx->postproc = DDS_SWIZZLE_XRBG;
403 case MKTAG('R', 'B', 'x', 'G'):
404 ctx->postproc = DDS_SWIZZLE_RBXG;
406 case MKTAG('R', 'G', 'x', 'B'):
407 ctx->postproc = DDS_SWIZZLE_RGXB;
409 case MKTAG('R', 'x', 'B', 'G'):
410 ctx->postproc = DDS_SWIZZLE_RXBG;
412 case MKTAG('x', 'G', 'x', 'R'):
413 ctx->postproc = DDS_SWIZZLE_XGXR;
415 case MKTAG('A', '2', 'D', '5'):
416 ctx->postproc = DDS_NORMAL_MAP;
423 static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
424 int slice, int thread_nb)
426 DDSContext *ctx = avctx->priv_data;
427 AVFrame *frame = arg;
428 const uint8_t *d = ctx->tex_data;
429 int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
430 int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
432 int start_slice, end_slice;
433 int base_blocks_per_slice = h_block / ctx->slice_count;
434 int remainder_blocks = h_block % ctx->slice_count;
436 /* When the frame height (in blocks) doesn't divide evenly between the
437 * number of slices, spread the remaining blocks evenly between the first
439 start_slice = slice * base_blocks_per_slice;
440 /* Add any extra blocks (one per slice) that have been added before this slice */
441 start_slice += FFMIN(slice, remainder_blocks);
443 end_slice = start_slice + base_blocks_per_slice;
444 /* Add an extra block if there are still remainder blocks to be accounted for */
445 if (slice < remainder_blocks)
448 for (y = start_slice; y < end_slice; y++) {
449 uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
450 int off = y * w_block;
451 for (x = 0; x < w_block; x++) {
452 ctx->tex_funct(p + x * 16, frame->linesize[0],
453 d + (off + x) * ctx->tex_ratio);
460 static void do_swizzle(AVFrame *frame, int x, int y)
463 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
464 uint8_t *src = frame->data[0] + i;
465 FFSWAP(uint8_t, src[x], src[y]);
469 static void run_postproc(AVCodecContext *avctx, AVFrame *frame)
471 DDSContext *ctx = avctx->priv_data;
474 switch (ctx->postproc) {
476 /* Alpha-exponential mode divides each channel by the maximum
477 * R, G or B value, and stores the multiplying factor in the
479 av_log(avctx, AV_LOG_DEBUG, "Post-processing alpha exponent.\n");
481 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
482 uint8_t *src = frame->data[0] + i;
488 src[0] = r * a / 255;
489 src[1] = g * a / 255;
490 src[2] = b * a / 255;
495 /* Normal maps work in the XYZ color space and they encode
496 * X in R or in A, depending on the texture type, Y in G and
497 * derive Z with a square root of the distance.
499 * http://www.realtimecollisiondetection.net/blog/?p=28 */
500 av_log(avctx, AV_LOG_DEBUG, "Post-processing normal map.\n");
502 x_off = ctx->tex_ratio == 8 ? 0 : 3;
503 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
504 uint8_t *src = frame->data[0] + i;
509 int d = (255 * 255 - x * x - y * y) / 2;
520 /* Data is Y-Co-Cg-A and not RGBA, but they are represented
521 * with the same masks in the DDPF header. */
522 av_log(avctx, AV_LOG_DEBUG, "Post-processing raw YCoCg.\n");
524 for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
525 uint8_t *src = frame->data[0] + i;
527 int cg = src[1] - 128;
528 int co = src[2] - 128;
531 src[0] = av_clip_uint8(y + co - cg);
532 src[1] = av_clip_uint8(y + cg);
533 src[2] = av_clip_uint8(y - co - cg);
538 /* Alpha and Luma are stored swapped. */
539 av_log(avctx, AV_LOG_DEBUG, "Post-processing swapped Luma/Alpha.\n");
541 for (i = 0; i < frame->linesize[0] * frame->height; i += 2) {
542 uint8_t *src = frame->data[0] + i;
543 FFSWAP(uint8_t, src[0], src[1]);
546 case DDS_SWIZZLE_A2XY:
547 /* Swap R and G, often used to restore a standard RGTC2. */
548 av_log(avctx, AV_LOG_DEBUG, "Post-processing A2XY swizzle.\n");
549 do_swizzle(frame, 0, 1);
551 case DDS_SWIZZLE_RBXG:
552 /* Swap G and A, then B and new A (G). */
553 av_log(avctx, AV_LOG_DEBUG, "Post-processing RBXG swizzle.\n");
554 do_swizzle(frame, 1, 3);
555 do_swizzle(frame, 2, 3);
557 case DDS_SWIZZLE_RGXB:
559 av_log(avctx, AV_LOG_DEBUG, "Post-processing RGXB swizzle.\n");
560 do_swizzle(frame, 2, 3);
562 case DDS_SWIZZLE_RXBG:
564 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXBG swizzle.\n");
565 do_swizzle(frame, 1, 3);
567 case DDS_SWIZZLE_RXGB:
568 /* Swap R and A (misleading name). */
569 av_log(avctx, AV_LOG_DEBUG, "Post-processing RXGB swizzle.\n");
570 do_swizzle(frame, 0, 3);
572 case DDS_SWIZZLE_XGBR:
573 /* Swap B and A, then R and new A (B). */
574 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGBR swizzle.\n");
575 do_swizzle(frame, 2, 3);
576 do_swizzle(frame, 0, 3);
578 case DDS_SWIZZLE_XGXR:
579 /* Swap G and A, then R and new A (G), then new R (G) and new G (A).
580 * This variant does not store any B component. */
581 av_log(avctx, AV_LOG_DEBUG, "Post-processing XGXR swizzle.\n");
582 do_swizzle(frame, 1, 3);
583 do_swizzle(frame, 0, 3);
584 do_swizzle(frame, 0, 1);
586 case DDS_SWIZZLE_XRBG:
587 /* Swap G and A, then R and new A (G). */
588 av_log(avctx, AV_LOG_DEBUG, "Post-processing XRBG swizzle.\n");
589 do_swizzle(frame, 1, 3);
590 do_swizzle(frame, 0, 3);
595 static int dds_decode(AVCodecContext *avctx, void *data,
596 int *got_frame, AVPacket *avpkt)
598 DDSContext *ctx = avctx->priv_data;
599 GetByteContext *gbc = &ctx->gbc;
600 AVFrame *frame = data;
604 ff_texturedsp_init(&ctx->texdsp);
605 bytestream2_init(gbc, avpkt->data, avpkt->size);
607 if (bytestream2_get_bytes_left(gbc) < 128) {
608 av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n",
609 bytestream2_get_bytes_left(gbc));
610 return AVERROR_INVALIDDATA;
613 if (bytestream2_get_le32(gbc) != MKTAG('D', 'D', 'S', ' ') ||
614 bytestream2_get_le32(gbc) != 124) { // header size
615 av_log(avctx, AV_LOG_ERROR, "Invalid DDS header.\n");
616 return AVERROR_INVALIDDATA;
619 bytestream2_skip(gbc, 4); // flags
621 avctx->height = bytestream2_get_le32(gbc);
622 avctx->width = bytestream2_get_le32(gbc);
623 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
625 av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
626 avctx->width, avctx->height);
630 /* Since codec is based on 4x4 blocks, size is aligned to 4. */
631 avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
632 avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
634 bytestream2_skip(gbc, 4); // pitch
635 bytestream2_skip(gbc, 4); // depth
636 mipmap = bytestream2_get_le32(gbc);
638 av_log(avctx, AV_LOG_VERBOSE, "Found %d mipmaps (ignored).\n", mipmap);
640 /* Extract pixel format information, considering additional elements
641 * in reserved1 and reserved2. */
642 ret = parse_pixel_format(avctx);
646 ret = ff_get_buffer(avctx, frame, 0);
650 if (ctx->compressed) {
651 int size = (avctx->coded_height / TEXTURE_BLOCK_H) *
652 (avctx->coded_width / TEXTURE_BLOCK_W) * ctx->tex_ratio;
653 ctx->slice_count = av_clip(avctx->thread_count, 1,
654 avctx->coded_height / TEXTURE_BLOCK_H);
656 if (bytestream2_get_bytes_left(gbc) < size) {
657 av_log(avctx, AV_LOG_ERROR,
658 "Compressed Buffer is too small (%d < %d).\n",
659 bytestream2_get_bytes_left(gbc), size);
660 return AVERROR_INVALIDDATA;
663 /* Use the decompress function on the texture, one block per thread. */
664 ctx->tex_data = gbc->buffer;
665 avctx->execute2(avctx, decompress_texture_thread, frame, NULL, ctx->slice_count);
667 int linesize = av_image_get_linesize(avctx->pix_fmt, frame->width, 0);
671 /* Use the first 1024 bytes as palette, then copy the rest. */
672 bytestream2_get_buffer(gbc, frame->data[1], 256 * 4);
673 for (i = 0; i < 256; i++)
674 AV_WN32(frame->data[1] + i*4,
675 (frame->data[1][2+i*4]<<0)+
676 (frame->data[1][1+i*4]<<8)+
677 (frame->data[1][0+i*4]<<16)+
678 (frame->data[1][3+i*4]<<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 (avctx->pix_fmt == AV_PIX_FMT_BGRA ||
697 avctx->pix_fmt == AV_PIX_FMT_RGBA ||
698 avctx->pix_fmt == AV_PIX_FMT_RGB0 ||
699 avctx->pix_fmt == AV_PIX_FMT_BGR0 ||
700 avctx->pix_fmt == AV_PIX_FMT_YA8)
701 run_postproc(avctx, frame);
703 /* Frame is ready to be output. */
704 frame->pict_type = AV_PICTURE_TYPE_I;
705 frame->key_frame = 1;
711 AVCodec ff_dds_decoder = {
713 .long_name = NULL_IF_CONFIG_SMALL("DirectDraw Surface image decoder"),
714 .type = AVMEDIA_TYPE_VIDEO,
715 .id = AV_CODEC_ID_DDS,
716 .decode = dds_decode,
717 .priv_data_size = sizeof(DDSContext),
718 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
719 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE