2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "swscale_internal.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/cpu.h"
32 #include "libavutil/avutil.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/bswap.h"
35 #include "libavutil/pixdesc.h"
37 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_1)[8][8] = {
38 { 0, 1, 0, 1, 0, 1, 0, 1,},
39 { 1, 0, 1, 0, 1, 0, 1, 0,},
40 { 0, 1, 0, 1, 0, 1, 0, 1,},
41 { 1, 0, 1, 0, 1, 0, 1, 0,},
42 { 0, 1, 0, 1, 0, 1, 0, 1,},
43 { 1, 0, 1, 0, 1, 0, 1, 0,},
44 { 0, 1, 0, 1, 0, 1, 0, 1,},
45 { 1, 0, 1, 0, 1, 0, 1, 0,},
47 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_3)[8][8] = {
48 { 1, 2, 1, 2, 1, 2, 1, 2,},
49 { 3, 0, 3, 0, 3, 0, 3, 0,},
50 { 1, 2, 1, 2, 1, 2, 1, 2,},
51 { 3, 0, 3, 0, 3, 0, 3, 0,},
52 { 1, 2, 1, 2, 1, 2, 1, 2,},
53 { 3, 0, 3, 0, 3, 0, 3, 0,},
54 { 1, 2, 1, 2, 1, 2, 1, 2,},
55 { 3, 0, 3, 0, 3, 0, 3, 0,},
57 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_64)[8][8] = {
58 { 18, 34, 30, 46, 17, 33, 29, 45,},
59 { 50, 2, 62, 14, 49, 1, 61, 13,},
60 { 26, 42, 22, 38, 25, 41, 21, 37,},
61 { 58, 10, 54, 6, 57, 9, 53, 5,},
62 { 16, 32, 28, 44, 19, 35, 31, 47,},
63 { 48, 0, 60, 12, 51, 3, 63, 15,},
64 { 24, 40, 20, 36, 27, 43, 23, 39,},
65 { 56, 8, 52, 4, 59, 11, 55, 7,},
67 extern const uint8_t dither_8x8_128[8][8];
68 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_256)[8][8] = {
69 { 72, 136, 120, 184, 68, 132, 116, 180,},
70 { 200, 8, 248, 56, 196, 4, 244, 52,},
71 { 104, 168, 88, 152, 100, 164, 84, 148,},
72 { 232, 40, 216, 24, 228, 36, 212, 20,},
73 { 64, 128, 102, 176, 76, 140, 124, 188,},
74 { 192, 0, 240, 48, 204, 12, 252, 60,},
75 { 96, 160, 80, 144, 108, 172, 92, 156,},
76 { 224, 32, 208, 16, 236, 44, 220, 28,},
79 #define RGB2YUV_SHIFT 15
80 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
81 #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
82 #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
83 #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
84 #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
85 #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
86 #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
87 #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
88 #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
90 static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,
94 uint8_t *ptr = plane + stride * y;
95 for (i = 0; i < height; i++) {
96 memset(ptr, val, width);
101 static void copyPlane(const uint8_t *src, int srcStride,
102 int srcSliceY, int srcSliceH, int width,
103 uint8_t *dst, int dstStride)
105 dst += dstStride * srcSliceY;
106 if (dstStride == srcStride && srcStride > 0) {
107 memcpy(dst, src, srcSliceH * dstStride);
110 for (i = 0; i < srcSliceH; i++) {
111 memcpy(dst, src, width);
118 static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
119 int srcStride[], int srcSliceY,
120 int srcSliceH, uint8_t *dstParam[],
123 uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;
125 copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
126 dstParam[0], dstStride[0]);
128 if (c->dstFormat == PIX_FMT_NV12)
129 interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,
130 srcStride[1], srcStride[2], dstStride[0]);
132 interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,
133 srcStride[2], srcStride[1], dstStride[0]);
138 static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
139 int srcStride[], int srcSliceY, int srcSliceH,
140 uint8_t *dstParam[], int dstStride[])
142 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
144 yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
145 srcStride[1], dstStride[0]);
150 static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],
151 int srcStride[], int srcSliceY, int srcSliceH,
152 uint8_t *dstParam[], int dstStride[])
154 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
156 yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
157 srcStride[1], dstStride[0]);
162 static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
163 int srcStride[], int srcSliceY, int srcSliceH,
164 uint8_t *dstParam[], int dstStride[])
166 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
168 yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
169 srcStride[1], dstStride[0]);
174 static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],
175 int srcStride[], int srcSliceY, int srcSliceH,
176 uint8_t *dstParam[], int dstStride[])
178 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
180 yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
181 srcStride[1], dstStride[0]);
186 static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
187 int srcStride[], int srcSliceY, int srcSliceH,
188 uint8_t *dstParam[], int dstStride[])
190 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
191 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
192 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
194 yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
195 dstStride[1], srcStride[0]);
198 fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
203 static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
204 int srcStride[], int srcSliceY, int srcSliceH,
205 uint8_t *dstParam[], int dstStride[])
207 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
208 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
209 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
211 yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
212 dstStride[1], srcStride[0]);
217 static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
218 int srcStride[], int srcSliceY, int srcSliceH,
219 uint8_t *dstParam[], int dstStride[])
221 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
222 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
223 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
225 uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
226 dstStride[1], srcStride[0]);
229 fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
234 static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
235 int srcStride[], int srcSliceY, int srcSliceH,
236 uint8_t *dstParam[], int dstStride[])
238 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
239 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
240 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
242 uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
243 dstStride[1], srcStride[0]);
248 static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,
249 const uint8_t *palette)
252 for (i = 0; i < num_pixels; i++)
253 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);
256 static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,
257 const uint8_t *palette)
261 for (i = 0; i < num_pixels; i++)
262 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];
265 static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,
266 const uint8_t *palette)
270 for (i = 0; i < num_pixels; i++) {
272 dst[0] = palette[src[i << 1] * 4 + 0];
273 dst[1] = palette[src[i << 1] * 4 + 1];
274 dst[2] = palette[src[i << 1] * 4 + 2];
279 static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
280 int srcStride[], int srcSliceY, int srcSliceH,
281 uint8_t *dst[], int dstStride[])
284 int srcstr = srcStride[0] >> 1;
285 int dststr = dstStride[0] >> 1;
286 uint16_t *dstPtr = (uint16_t *) dst[0];
287 const uint16_t *srcPtr = (const uint16_t *) src[0];
288 int min_stride = FFMIN(srcstr, dststr);
290 for (i = 0; i < srcSliceH; i++) {
291 for (j = 0; j < min_stride; j++) {
292 dstPtr[j] = av_bswap16(srcPtr[j]);
301 static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
302 int srcSliceY, int srcSliceH, uint8_t *dst[],
305 const enum PixelFormat srcFormat = c->srcFormat;
306 const enum PixelFormat dstFormat = c->dstFormat;
307 void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
308 const uint8_t *palette) = NULL;
310 uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
311 const uint8_t *srcPtr = src[0];
313 if (srcFormat == PIX_FMT_Y400A) {
315 case PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
316 case PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
317 case PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
318 case PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
319 case PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
320 case PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
322 } else if (usePal(srcFormat)) {
324 case PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
325 case PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
326 case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
327 case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
328 case PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
329 case PIX_FMT_BGR24 : conv = sws_convertPalette8ToPacked24; break;
334 av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
335 sws_format_name(srcFormat), sws_format_name(dstFormat));
337 for (i = 0; i < srcSliceH; i++) {
338 conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
339 srcPtr += srcStride[0];
340 dstPtr += dstStride[0];
347 static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],
348 uint8_t *dst, int dstStride, int srcSliceH,
352 for (h = 0; h < srcSliceH; h++) {
353 uint8_t *dest = dst + dstStride * h;
354 for (x = 0; x < width; x++) {
360 for (i = 0; i < 3; i++)
361 src[i] += srcStride[i];
365 static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],
366 uint8_t *dst, int dstStride, int srcSliceH,
367 int alpha_first, int width)
370 for (h = 0; h < srcSliceH; h++) {
371 uint8_t *dest = dst + dstStride * h;
374 for (x = 0; x < width; x++) {
381 for (x = 0; x < width; x++) {
389 for (i = 0; i < 3; i++)
390 src[i] += srcStride[i];
394 static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
395 int srcStride[], int srcSliceY, int srcSliceH,
396 uint8_t *dst[], int dstStride[])
399 if (c->srcFormat != PIX_FMT_GBRP) {
400 av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
401 av_get_pix_fmt_name(c->srcFormat),
402 av_get_pix_fmt_name(c->dstFormat));
406 switch (c->dstFormat) {
408 gbr24ptopacked24((const uint8_t *[]) { src[1], src[0], src[2] },
409 (int []) { srcStride[1], srcStride[0], srcStride[2] },
410 dst[0] + srcSliceY * dstStride[0], dstStride[0],
415 gbr24ptopacked24((const uint8_t *[]) { src[2], src[0], src[1] },
416 (int []) { srcStride[2], srcStride[0], srcStride[1] },
417 dst[0] + srcSliceY * dstStride[0], dstStride[0],
424 gbr24ptopacked32((const uint8_t *[]) { src[2], src[0], src[1] },
425 (int []) { srcStride[2], srcStride[0], srcStride[1] },
426 dst[0] + srcSliceY * dstStride[0], dstStride[0],
427 srcSliceH, alpha_first, c->srcW);
433 gbr24ptopacked32((const uint8_t *[]) { src[1], src[0], src[2] },
434 (int []) { srcStride[1], srcStride[0], srcStride[2] },
435 dst[0] + srcSliceY * dstStride[0], dstStride[0],
436 srcSliceH, alpha_first, c->srcW);
440 av_log(c, AV_LOG_ERROR,
441 "unsupported planar RGB conversion %s -> %s\n",
442 av_get_pix_fmt_name(c->srcFormat),
443 av_get_pix_fmt_name(c->dstFormat));
449 #define isRGBA32(x) ( \
450 (x) == PIX_FMT_ARGB \
451 || (x) == PIX_FMT_RGBA \
452 || (x) == PIX_FMT_BGRA \
453 || (x) == PIX_FMT_ABGR \
456 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
457 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
458 static rgbConvFn findRgbConvFn(SwsContext *c)
460 const enum PixelFormat srcFormat = c->srcFormat;
461 const enum PixelFormat dstFormat = c->dstFormat;
462 const int srcId = c->srcFormatBpp;
463 const int dstId = c->dstFormatBpp;
464 rgbConvFn conv = NULL;
466 #define IS_NOT_NE(bpp, fmt) \
467 (((bpp + 7) >> 3) == 2 && \
468 (!(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
470 /* if this is non-native rgb444/555/565, don't handle it here. */
471 if (IS_NOT_NE(srcId, srcFormat) || IS_NOT_NE(dstId, dstFormat))
474 #define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)
476 if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
477 if ( CONV_IS(ABGR, RGBA)
478 || CONV_IS(ARGB, BGRA)
479 || CONV_IS(BGRA, ARGB)
480 || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
481 else if (CONV_IS(ABGR, ARGB)
482 || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
483 else if (CONV_IS(ABGR, BGRA)
484 || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
485 else if (CONV_IS(BGRA, RGBA)
486 || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
487 else if (CONV_IS(BGRA, ABGR)
488 || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
491 if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
492 (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
493 switch (srcId | (dstId << 16)) {
494 case 0x000F000C: conv = rgb12to15; break;
495 case 0x000F0010: conv = rgb16to15; break;
496 case 0x000F0018: conv = rgb24to15; break;
497 case 0x000F0020: conv = rgb32to15; break;
498 case 0x0010000F: conv = rgb15to16; break;
499 case 0x00100018: conv = rgb24to16; break;
500 case 0x00100020: conv = rgb32to16; break;
501 case 0x0018000F: conv = rgb15to24; break;
502 case 0x00180010: conv = rgb16to24; break;
503 case 0x00180020: conv = rgb32to24; break;
504 case 0x0020000F: conv = rgb15to32; break;
505 case 0x00200010: conv = rgb16to32; break;
506 case 0x00200018: conv = rgb24to32; break;
508 } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
509 (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
510 switch (srcId | (dstId << 16)) {
511 case 0x000C000C: conv = rgb12tobgr12; break;
512 case 0x000F000F: conv = rgb15tobgr15; break;
513 case 0x000F0010: conv = rgb16tobgr15; break;
514 case 0x000F0018: conv = rgb24tobgr15; break;
515 case 0x000F0020: conv = rgb32tobgr15; break;
516 case 0x0010000F: conv = rgb15tobgr16; break;
517 case 0x00100010: conv = rgb16tobgr16; break;
518 case 0x00100018: conv = rgb24tobgr16; break;
519 case 0x00100020: conv = rgb32tobgr16; break;
520 case 0x0018000F: conv = rgb15tobgr24; break;
521 case 0x00180010: conv = rgb16tobgr24; break;
522 case 0x00180018: conv = rgb24tobgr24; break;
523 case 0x00180020: conv = rgb32tobgr24; break;
524 case 0x0020000F: conv = rgb15tobgr32; break;
525 case 0x00200010: conv = rgb16tobgr32; break;
526 case 0x00200018: conv = rgb24tobgr32; break;
533 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
534 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
535 int srcSliceY, int srcSliceH, uint8_t *dst[],
539 const enum PixelFormat srcFormat = c->srcFormat;
540 const enum PixelFormat dstFormat = c->dstFormat;
541 const int srcBpp = (c->srcFormatBpp + 7) >> 3;
542 const int dstBpp = (c->dstFormatBpp + 7) >> 3;
543 rgbConvFn conv = findRgbConvFn(c);
546 av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
547 sws_format_name(srcFormat), sws_format_name(dstFormat));
549 const uint8_t *srcPtr = src[0];
550 uint8_t *dstPtr = dst[0];
551 if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) &&
552 !isRGBA32(dstFormat))
553 srcPtr += ALT32_CORR;
555 if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) &&
556 !isRGBA32(srcFormat))
557 dstPtr += ALT32_CORR;
559 if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
560 !(srcStride[0] % srcBpp))
561 conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
562 srcSliceH * srcStride[0]);
565 dstPtr += dstStride[0] * srcSliceY;
567 for (i = 0; i < srcSliceH; i++) {
568 conv(srcPtr, dstPtr, c->srcW * srcBpp);
569 srcPtr += srcStride[0];
570 dstPtr += dstStride[0];
577 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
578 int srcStride[], int srcSliceY, int srcSliceH,
579 uint8_t *dst[], int dstStride[])
583 dst[0] + srcSliceY * dstStride[0],
584 dst[1] + (srcSliceY >> 1) * dstStride[1],
585 dst[2] + (srcSliceY >> 1) * dstStride[2],
587 dstStride[0], dstStride[1], srcStride[0]);
589 fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
593 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
594 int srcStride[], int srcSliceY, int srcSliceH,
595 uint8_t *dst[], int dstStride[])
597 copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
598 dst[0], dstStride[0]);
600 planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
601 srcSliceH >> 2, srcStride[1], dstStride[1]);
602 planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
603 srcSliceH >> 2, srcStride[2], dstStride[2]);
605 fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
609 /* unscaled copy like stuff (assumes nearly identical formats) */
610 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
611 int srcStride[], int srcSliceY, int srcSliceH,
612 uint8_t *dst[], int dstStride[])
614 if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
615 memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
618 const uint8_t *srcPtr = src[0];
619 uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
622 /* universal length finder */
623 while (length + c->srcW <= FFABS(dstStride[0]) &&
624 length + c->srcW <= FFABS(srcStride[0]))
628 for (i = 0; i < srcSliceH; i++) {
629 memcpy(dstPtr, srcPtr, length);
630 srcPtr += srcStride[0];
631 dstPtr += dstStride[0];
637 #define clip9(x) av_clip_uintp2(x, 9)
638 #define clip10(x) av_clip_uintp2(x, 10)
639 #define DITHER_COPY(dst, dstStride, wfunc, src, srcStride, rfunc, dithers, shift, clip) \
640 for (i = 0; i < height; i++) { \
641 const uint8_t *dither = dithers[i & 7]; \
642 for (j = 0; j < length - 7; j += 8) { \
643 wfunc(&dst[j + 0], clip((rfunc(&src[j + 0]) + dither[0]) >> shift)); \
644 wfunc(&dst[j + 1], clip((rfunc(&src[j + 1]) + dither[1]) >> shift)); \
645 wfunc(&dst[j + 2], clip((rfunc(&src[j + 2]) + dither[2]) >> shift)); \
646 wfunc(&dst[j + 3], clip((rfunc(&src[j + 3]) + dither[3]) >> shift)); \
647 wfunc(&dst[j + 4], clip((rfunc(&src[j + 4]) + dither[4]) >> shift)); \
648 wfunc(&dst[j + 5], clip((rfunc(&src[j + 5]) + dither[5]) >> shift)); \
649 wfunc(&dst[j + 6], clip((rfunc(&src[j + 6]) + dither[6]) >> shift)); \
650 wfunc(&dst[j + 7], clip((rfunc(&src[j + 7]) + dither[7]) >> shift)); \
652 for (; j < length; j++) \
653 wfunc(&dst[j], (rfunc(&src[j]) + dither[j & 7]) >> shift); \
658 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
659 int srcStride[], int srcSliceY, int srcSliceH,
660 uint8_t *dst[], int dstStride[])
663 for (plane = 0; plane < 4; plane++) {
664 int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
665 int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
666 int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
667 const uint8_t *srcPtr = src[plane];
668 uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
672 // ignore palette for GRAY8
673 if (plane == 1 && !dst[2]) continue;
674 if (!src[plane] || (plane == 1 && !src[2])) {
675 if (is16BPS(c->dstFormat))
677 fillPlane(dst[plane], dstStride[plane], length, height, y,
678 (plane == 3) ? 255 : 128);
680 if (is9_OR_10BPS(c->srcFormat)) {
681 const int src_depth = av_pix_fmt_descriptors[c->srcFormat].comp[plane].depth_minus1 + 1;
682 const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1 + 1;
683 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
685 if (is16BPS(c->dstFormat)) {
686 uint16_t *dstPtr2 = (uint16_t *) dstPtr;
687 #define COPY9_OR_10TO16(rfunc, wfunc) \
688 for (i = 0; i < height; i++) { \
689 for (j = 0; j < length; j++) { \
690 int srcpx = rfunc(&srcPtr2[j]); \
691 wfunc(&dstPtr2[j], (srcpx << (16 - src_depth)) | (srcpx >> (2 * src_depth - 16))); \
693 dstPtr2 += dstStride[plane] / 2; \
694 srcPtr2 += srcStride[plane] / 2; \
696 if (isBE(c->dstFormat)) {
697 if (isBE(c->srcFormat)) {
698 COPY9_OR_10TO16(AV_RB16, AV_WB16);
700 COPY9_OR_10TO16(AV_RL16, AV_WB16);
703 if (isBE(c->srcFormat)) {
704 COPY9_OR_10TO16(AV_RB16, AV_WL16);
706 COPY9_OR_10TO16(AV_RL16, AV_WL16);
709 } else if (is9_OR_10BPS(c->dstFormat)) {
710 uint16_t *dstPtr2 = (uint16_t *) dstPtr;
711 #define COPY9_OR_10TO9_OR_10(loop) \
712 for (i = 0; i < height; i++) { \
713 for (j = 0; j < length; j++) { \
716 dstPtr2 += dstStride[plane] / 2; \
717 srcPtr2 += srcStride[plane] / 2; \
719 #define COPY9_OR_10TO9_OR_10_2(rfunc, wfunc) \
720 if (dst_depth > src_depth) { \
721 COPY9_OR_10TO9_OR_10(int srcpx = rfunc(&srcPtr2[j]); \
722 wfunc(&dstPtr2[j], (srcpx << 1) | (srcpx >> 9))); \
723 } else if (dst_depth < src_depth) { \
724 DITHER_COPY(dstPtr2, dstStride[plane] / 2, wfunc, \
725 srcPtr2, srcStride[plane] / 2, rfunc, \
726 dither_8x8_1, 1, clip9); \
728 COPY9_OR_10TO9_OR_10(wfunc(&dstPtr2[j], rfunc(&srcPtr2[j]))); \
730 if (isBE(c->dstFormat)) {
731 if (isBE(c->srcFormat)) {
732 COPY9_OR_10TO9_OR_10_2(AV_RB16, AV_WB16);
734 COPY9_OR_10TO9_OR_10_2(AV_RL16, AV_WB16);
737 if (isBE(c->srcFormat)) {
738 COPY9_OR_10TO9_OR_10_2(AV_RB16, AV_WL16);
740 COPY9_OR_10TO9_OR_10_2(AV_RL16, AV_WL16);
744 #define W8(a, b) { *(a) = (b); }
745 #define COPY9_OR_10TO8(rfunc) \
746 if (src_depth == 9) { \
747 DITHER_COPY(dstPtr, dstStride[plane], W8, \
748 srcPtr2, srcStride[plane] / 2, rfunc, \
749 dither_8x8_1, 1, av_clip_uint8); \
751 DITHER_COPY(dstPtr, dstStride[plane], W8, \
752 srcPtr2, srcStride[plane] / 2, rfunc, \
753 dither_8x8_3, 2, av_clip_uint8); \
755 if (isBE(c->srcFormat)) {
756 COPY9_OR_10TO8(AV_RB16);
758 COPY9_OR_10TO8(AV_RL16);
761 } else if (is9_OR_10BPS(c->dstFormat)) {
762 const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1 + 1;
763 uint16_t *dstPtr2 = (uint16_t *) dstPtr;
765 if (is16BPS(c->srcFormat)) {
766 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
767 #define COPY16TO9_OR_10(rfunc, wfunc) \
768 if (dst_depth == 9) { \
769 DITHER_COPY(dstPtr2, dstStride[plane] / 2, wfunc, \
770 srcPtr2, srcStride[plane] / 2, rfunc, \
771 dither_8x8_128, 7, clip9); \
773 DITHER_COPY(dstPtr2, dstStride[plane] / 2, wfunc, \
774 srcPtr2, srcStride[plane] / 2, rfunc, \
775 dither_8x8_64, 6, clip10); \
777 if (isBE(c->dstFormat)) {
778 if (isBE(c->srcFormat)) {
779 COPY16TO9_OR_10(AV_RB16, AV_WB16);
781 COPY16TO9_OR_10(AV_RL16, AV_WB16);
784 if (isBE(c->srcFormat)) {
785 COPY16TO9_OR_10(AV_RB16, AV_WL16);
787 COPY16TO9_OR_10(AV_RL16, AV_WL16);
791 #define COPY8TO9_OR_10(wfunc) \
792 for (i = 0; i < height; i++) { \
793 for (j = 0; j < length; j++) { \
794 const int srcpx = srcPtr[j]; \
795 wfunc(&dstPtr2[j], (srcpx << (dst_depth - 8)) | (srcpx >> (16 - dst_depth))); \
797 dstPtr2 += dstStride[plane] / 2; \
798 srcPtr += srcStride[plane]; \
800 if (isBE(c->dstFormat)) {
801 COPY8TO9_OR_10(AV_WB16);
803 COPY8TO9_OR_10(AV_WL16);
806 } else if (is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)) {
807 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
808 #define COPY16TO8(rfunc) \
809 DITHER_COPY(dstPtr, dstStride[plane], W8, \
810 srcPtr2, srcStride[plane] / 2, rfunc, \
811 dither_8x8_256, 8, av_clip_uint8);
812 if (isBE(c->srcFormat)) {
817 } else if (!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)) {
818 for (i = 0; i < height; i++) {
819 for (j = 0; j < length; j++) {
820 dstPtr[ j << 1 ] = srcPtr[j];
821 dstPtr[(j << 1) + 1] = srcPtr[j];
823 srcPtr += srcStride[plane];
824 dstPtr += dstStride[plane];
826 } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
827 isBE(c->srcFormat) != isBE(c->dstFormat)) {
829 for (i = 0; i < height; i++) {
830 for (j = 0; j < length; j++)
831 ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
832 srcPtr += srcStride[plane];
833 dstPtr += dstStride[plane];
835 } else if (dstStride[plane] == srcStride[plane] &&
836 srcStride[plane] > 0 && srcStride[plane] == length) {
837 memcpy(dst[plane] + dstStride[plane] * y, src[plane],
838 height * dstStride[plane]);
840 if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
842 else if (!av_pix_fmt_descriptors[c->srcFormat].comp[0].depth_minus1)
843 length >>= 3; // monowhite/black
844 for (i = 0; i < height; i++) {
845 memcpy(dstPtr, srcPtr, length);
846 srcPtr += srcStride[plane];
847 dstPtr += dstStride[plane];
856 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
857 ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
858 (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
861 void ff_get_unscaled_swscale(SwsContext *c)
863 const enum PixelFormat srcFormat = c->srcFormat;
864 const enum PixelFormat dstFormat = c->dstFormat;
865 const int flags = c->flags;
866 const int dstH = c->dstH;
869 needsDither = isAnyRGB(dstFormat) &&
870 c->dstFormatBpp < 24 &&
871 (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
874 if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) &&
875 (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {
876 c->swScale = planarToNv12Wrapper;
879 if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUV422P ||
880 srcFormat == PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
881 !(flags & SWS_ACCURATE_RND) && !(dstH & 1)) {
882 c->swScale = ff_yuv2rgb_get_func_ptr(c);
885 if (srcFormat == PIX_FMT_YUV410P &&
886 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&
887 !(flags & SWS_BITEXACT)) {
888 c->swScale = yvu9ToYv12Wrapper;
892 if (srcFormat == PIX_FMT_BGR24 &&
893 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&
894 !(flags & SWS_ACCURATE_RND))
895 c->swScale = bgr24ToYv12Wrapper;
897 /* RGB/BGR -> RGB/BGR (no dither needed forms) */
898 if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
899 && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
900 c->swScale= rgbToRgbWrapper;
902 if (isPlanarRGB(srcFormat) && isPackedRGB(dstFormat))
903 c->swScale = planarRgbToRgbWrapper;
905 /* bswap 16 bits per pixel/component packed formats */
906 if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR444) ||
907 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR48) ||
908 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR555) ||
909 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR565) ||
910 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_GRAY16) ||
911 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB444) ||
912 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB48) ||
913 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB555) ||
914 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB565))
915 c->swScale = packed_16bpc_bswap;
917 if ((usePal(srcFormat) && (
918 dstFormat == PIX_FMT_RGB32 ||
919 dstFormat == PIX_FMT_RGB32_1 ||
920 dstFormat == PIX_FMT_RGB24 ||
921 dstFormat == PIX_FMT_BGR32 ||
922 dstFormat == PIX_FMT_BGR32_1 ||
923 dstFormat == PIX_FMT_BGR24)))
924 c->swScale = palToRgbWrapper;
926 if (srcFormat == PIX_FMT_YUV422P) {
927 if (dstFormat == PIX_FMT_YUYV422)
928 c->swScale = yuv422pToYuy2Wrapper;
929 else if (dstFormat == PIX_FMT_UYVY422)
930 c->swScale = yuv422pToUyvyWrapper;
933 /* LQ converters if -sws 0 or -sws 4*/
934 if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
936 if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {
937 if (dstFormat == PIX_FMT_YUYV422)
938 c->swScale = planarToYuy2Wrapper;
939 else if (dstFormat == PIX_FMT_UYVY422)
940 c->swScale = planarToUyvyWrapper;
943 if (srcFormat == PIX_FMT_YUYV422 &&
944 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
945 c->swScale = yuyvToYuv420Wrapper;
946 if (srcFormat == PIX_FMT_UYVY422 &&
947 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
948 c->swScale = uyvyToYuv420Wrapper;
949 if (srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)
950 c->swScale = yuyvToYuv422Wrapper;
951 if (srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
952 c->swScale = uyvyToYuv422Wrapper;
955 if ( srcFormat == dstFormat ||
956 (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P) ||
957 (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P) ||
958 (isPlanarYUV(srcFormat) && isGray(dstFormat)) ||
959 (isPlanarYUV(dstFormat) && isGray(srcFormat)) ||
960 (isGray(dstFormat) && isGray(srcFormat)) ||
961 (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
962 c->chrDstHSubSample == c->chrSrcHSubSample &&
963 c->chrDstVSubSample == c->chrSrcVSubSample &&
964 dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21 &&
965 srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))
967 if (isPacked(c->srcFormat))
968 c->swScale = packedCopyWrapper;
969 else /* Planar YUV or gray */
970 c->swScale = planarCopyWrapper;
974 ff_bfin_get_unscaled_swscale(c);
976 ff_swscale_get_unscaled_altivec(c);
979 static void reset_ptr(const uint8_t *src[], int format)
981 if (!isALPHA(format))
983 if (!isPlanar(format)) {
984 src[3] = src[2] = NULL;
991 static int check_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt,
992 const int linesizes[4])
994 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
997 for (i = 0; i < 4; i++) {
998 int plane = desc->comp[i].plane;
999 if (!data[plane] || !linesizes[plane])
1007 * swscale wrapper, so we don't need to export the SwsContext.
1008 * Assumes planar YUV to be in YUV order instead of YVU.
1010 int attribute_align_arg sws_scale(struct SwsContext *c,
1011 const uint8_t * const srcSlice[],
1012 const int srcStride[], int srcSliceY,
1013 int srcSliceH, uint8_t *const dst[],
1014 const int dstStride[])
1017 const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] };
1018 uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] };
1020 // do not mess up sliceDir if we have a "trailing" 0-size slice
1024 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
1025 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
1028 if (!check_image_pointers(dst, c->dstFormat, dstStride)) {
1029 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
1033 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
1034 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
1037 if (c->sliceDir == 0) {
1038 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
1041 if (usePal(c->srcFormat)) {
1042 for (i = 0; i < 256; i++) {
1043 int p, r, g, b, y, u, v;
1044 if (c->srcFormat == PIX_FMT_PAL8) {
1045 p = ((const uint32_t *)(srcSlice[1]))[i];
1046 r = (p >> 16) & 0xFF;
1047 g = (p >> 8) & 0xFF;
1049 } else if (c->srcFormat == PIX_FMT_RGB8) {
1050 r = ( i >> 5 ) * 36;
1051 g = ((i >> 2) & 7) * 36;
1053 } else if (c->srcFormat == PIX_FMT_BGR8) {
1054 b = ( i >> 6 ) * 85;
1055 g = ((i >> 3) & 7) * 36;
1057 } else if (c->srcFormat == PIX_FMT_RGB4_BYTE) {
1058 r = ( i >> 3 ) * 255;
1059 g = ((i >> 1) & 3) * 85;
1061 } else if (c->srcFormat == PIX_FMT_GRAY8 ||
1062 c->srcFormat == PIX_FMT_Y400A) {
1065 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
1066 b = ( i >> 3 ) * 255;
1067 g = ((i >> 1) & 3) * 85;
1070 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1071 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1072 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1073 c->pal_yuv[i] = y + (u << 8) + (v << 16);
1075 switch (c->dstFormat) {
1080 c->pal_rgb[i] = r + (g << 8) + (b << 16);
1082 case PIX_FMT_BGR32_1:
1086 c->pal_rgb[i] = (r + (g << 8) + (b << 16)) << 8;
1088 case PIX_FMT_RGB32_1:
1092 c->pal_rgb[i] = (b + (g << 8) + (r << 16)) << 8;
1099 c->pal_rgb[i] = b + (g << 8) + (r << 16);
1104 // copy strides, so they can safely be modified
1105 if (c->sliceDir == 1) {
1106 // slices go from top to bottom
1107 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
1109 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
1112 reset_ptr(src2, c->srcFormat);
1113 reset_ptr((const uint8_t **) dst2, c->dstFormat);
1115 /* reset slice direction at end of frame */
1116 if (srcSliceY + srcSliceH == c->srcH)
1119 return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
1122 // slices go from bottom to top => we flip the image internally
1123 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
1125 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
1128 src2[0] += (srcSliceH - 1) * srcStride[0];
1129 if (!usePal(c->srcFormat))
1130 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
1131 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
1132 src2[3] += (srcSliceH - 1) * srcStride[3];
1133 dst2[0] += ( c->dstH - 1) * dstStride[0];
1134 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
1135 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
1136 dst2[3] += ( c->dstH - 1) * dstStride[3];
1138 reset_ptr(src2, c->srcFormat);
1139 reset_ptr((const uint8_t **) dst2, c->dstFormat);
1141 /* reset slice direction at end of frame */
1145 return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
1146 srcSliceH, dst2, dstStride2);
1150 /* Convert the palette to the same packed 32-bit format as the palette */
1151 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1152 int num_pixels, const uint8_t *palette)
1156 for (i = 0; i < num_pixels; i++)
1157 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1160 /* Palette format: ABCD -> dst format: ABC */
1161 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1162 int num_pixels, const uint8_t *palette)
1166 for (i = 0; i < num_pixels; i++) {
1168 dst[0] = palette[src[i] * 4 + 0];
1169 dst[1] = palette[src[i] * 4 + 1];
1170 dst[2] = palette[src[i] * 4 + 2];