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 == AV_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 AVPixelFormat srcFormat = c->srcFormat;
306 const enum AVPixelFormat 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 == AV_PIX_FMT_Y400A) {
315 case AV_PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
316 case AV_PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
317 case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
318 case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
319 case AV_PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
320 case AV_PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
322 } else if (usePal(srcFormat)) {
324 case AV_PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
325 case AV_PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
326 case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
327 case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
328 case AV_PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
329 case AV_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 const uint8_t *src102[] = { src[1], src[0], src[2] };
400 const uint8_t *src201[] = { src[2], src[0], src[1] };
401 int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };
402 int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };
404 if (c->srcFormat != AV_PIX_FMT_GBRP) {
405 av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
406 av_get_pix_fmt_name(c->srcFormat),
407 av_get_pix_fmt_name(c->dstFormat));
411 switch (c->dstFormat) {
412 case AV_PIX_FMT_BGR24:
413 gbr24ptopacked24(src102, stride102,
414 dst[0] + srcSliceY * dstStride[0], dstStride[0],
418 case AV_PIX_FMT_RGB24:
419 gbr24ptopacked24(src201, stride201,
420 dst[0] + srcSliceY * dstStride[0], dstStride[0],
424 case AV_PIX_FMT_ARGB:
426 case AV_PIX_FMT_RGBA:
427 gbr24ptopacked32(src201, stride201,
428 dst[0] + srcSliceY * dstStride[0], dstStride[0],
429 srcSliceH, alpha_first, c->srcW);
432 case AV_PIX_FMT_ABGR:
434 case AV_PIX_FMT_BGRA:
435 gbr24ptopacked32(src102, stride102,
436 dst[0] + srcSliceY * dstStride[0], dstStride[0],
437 srcSliceH, alpha_first, c->srcW);
441 av_log(c, AV_LOG_ERROR,
442 "unsupported planar RGB conversion %s -> %s\n",
443 av_get_pix_fmt_name(c->srcFormat),
444 av_get_pix_fmt_name(c->dstFormat));
450 #define isRGBA32(x) ( \
451 (x) == AV_PIX_FMT_ARGB \
452 || (x) == AV_PIX_FMT_RGBA \
453 || (x) == AV_PIX_FMT_BGRA \
454 || (x) == AV_PIX_FMT_ABGR \
457 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
458 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
459 static rgbConvFn findRgbConvFn(SwsContext *c)
461 const enum AVPixelFormat srcFormat = c->srcFormat;
462 const enum AVPixelFormat dstFormat = c->dstFormat;
463 const int srcId = c->srcFormatBpp;
464 const int dstId = c->dstFormatBpp;
465 rgbConvFn conv = NULL;
466 const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(srcFormat);
467 const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(dstFormat);
469 #define IS_NOT_NE(bpp, desc) \
470 (((bpp + 7) >> 3) == 2 && \
471 (!(desc->flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
473 /* if this is non-native rgb444/555/565, don't handle it here. */
474 if (IS_NOT_NE(srcId, desc_src) || IS_NOT_NE(dstId, desc_dst))
477 #define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
479 if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
480 if ( CONV_IS(ABGR, RGBA)
481 || CONV_IS(ARGB, BGRA)
482 || CONV_IS(BGRA, ARGB)
483 || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
484 else if (CONV_IS(ABGR, ARGB)
485 || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
486 else if (CONV_IS(ABGR, BGRA)
487 || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
488 else if (CONV_IS(BGRA, RGBA)
489 || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
490 else if (CONV_IS(BGRA, ABGR)
491 || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
494 if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
495 (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
496 switch (srcId | (dstId << 16)) {
497 case 0x000F000C: conv = rgb12to15; break;
498 case 0x000F0010: conv = rgb16to15; break;
499 case 0x000F0018: conv = rgb24to15; break;
500 case 0x000F0020: conv = rgb32to15; break;
501 case 0x0010000F: conv = rgb15to16; break;
502 case 0x00100018: conv = rgb24to16; break;
503 case 0x00100020: conv = rgb32to16; break;
504 case 0x0018000F: conv = rgb15to24; break;
505 case 0x00180010: conv = rgb16to24; break;
506 case 0x00180020: conv = rgb32to24; break;
507 case 0x0020000F: conv = rgb15to32; break;
508 case 0x00200010: conv = rgb16to32; break;
509 case 0x00200018: conv = rgb24to32; break;
511 } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
512 (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
513 switch (srcId | (dstId << 16)) {
514 case 0x000C000C: conv = rgb12tobgr12; break;
515 case 0x000F000F: conv = rgb15tobgr15; break;
516 case 0x000F0010: conv = rgb16tobgr15; break;
517 case 0x000F0018: conv = rgb24tobgr15; break;
518 case 0x000F0020: conv = rgb32tobgr15; break;
519 case 0x0010000F: conv = rgb15tobgr16; break;
520 case 0x00100010: conv = rgb16tobgr16; break;
521 case 0x00100018: conv = rgb24tobgr16; break;
522 case 0x00100020: conv = rgb32tobgr16; break;
523 case 0x0018000F: conv = rgb15tobgr24; break;
524 case 0x00180010: conv = rgb16tobgr24; break;
525 case 0x00180018: conv = rgb24tobgr24; break;
526 case 0x00180020: conv = rgb32tobgr24; break;
527 case 0x0020000F: conv = rgb15tobgr32; break;
528 case 0x00200010: conv = rgb16tobgr32; break;
529 case 0x00200018: conv = rgb24tobgr32; break;
536 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
537 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
538 int srcSliceY, int srcSliceH, uint8_t *dst[],
542 const enum AVPixelFormat srcFormat = c->srcFormat;
543 const enum AVPixelFormat dstFormat = c->dstFormat;
544 const int srcBpp = (c->srcFormatBpp + 7) >> 3;
545 const int dstBpp = (c->dstFormatBpp + 7) >> 3;
546 rgbConvFn conv = findRgbConvFn(c);
549 av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
550 sws_format_name(srcFormat), sws_format_name(dstFormat));
552 const uint8_t *srcPtr = src[0];
553 uint8_t *dstPtr = dst[0];
554 if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
555 !isRGBA32(dstFormat))
556 srcPtr += ALT32_CORR;
558 if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
559 !isRGBA32(srcFormat))
560 dstPtr += ALT32_CORR;
562 if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
563 !(srcStride[0] % srcBpp))
564 conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
565 srcSliceH * srcStride[0]);
568 dstPtr += dstStride[0] * srcSliceY;
570 for (i = 0; i < srcSliceH; i++) {
571 conv(srcPtr, dstPtr, c->srcW * srcBpp);
572 srcPtr += srcStride[0];
573 dstPtr += dstStride[0];
580 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
581 int srcStride[], int srcSliceY, int srcSliceH,
582 uint8_t *dst[], int dstStride[])
586 dst[0] + srcSliceY * dstStride[0],
587 dst[1] + (srcSliceY >> 1) * dstStride[1],
588 dst[2] + (srcSliceY >> 1) * dstStride[2],
590 dstStride[0], dstStride[1], srcStride[0]);
592 fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
596 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
597 int srcStride[], int srcSliceY, int srcSliceH,
598 uint8_t *dst[], int dstStride[])
600 copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
601 dst[0], dstStride[0]);
603 planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
604 srcSliceH >> 2, srcStride[1], dstStride[1]);
605 planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
606 srcSliceH >> 2, srcStride[2], dstStride[2]);
608 fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
612 /* unscaled copy like stuff (assumes nearly identical formats) */
613 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
614 int srcStride[], int srcSliceY, int srcSliceH,
615 uint8_t *dst[], int dstStride[])
617 if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
618 memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
621 const uint8_t *srcPtr = src[0];
622 uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
625 /* universal length finder */
626 while (length + c->srcW <= FFABS(dstStride[0]) &&
627 length + c->srcW <= FFABS(srcStride[0]))
631 for (i = 0; i < srcSliceH; i++) {
632 memcpy(dstPtr, srcPtr, length);
633 srcPtr += srcStride[0];
634 dstPtr += dstStride[0];
640 #define clip9(x) av_clip_uintp2(x, 9)
641 #define clip10(x) av_clip_uintp2(x, 10)
642 #define DITHER_COPY(dst, dstStride, wfunc, src, srcStride, rfunc, dithers, shift, clip) \
643 for (i = 0; i < height; i++) { \
644 const uint8_t *dither = dithers[i & 7]; \
645 for (j = 0; j < length - 7; j += 8) { \
646 wfunc(&dst[j + 0], clip((rfunc(&src[j + 0]) + dither[0]) >> shift)); \
647 wfunc(&dst[j + 1], clip((rfunc(&src[j + 1]) + dither[1]) >> shift)); \
648 wfunc(&dst[j + 2], clip((rfunc(&src[j + 2]) + dither[2]) >> shift)); \
649 wfunc(&dst[j + 3], clip((rfunc(&src[j + 3]) + dither[3]) >> shift)); \
650 wfunc(&dst[j + 4], clip((rfunc(&src[j + 4]) + dither[4]) >> shift)); \
651 wfunc(&dst[j + 5], clip((rfunc(&src[j + 5]) + dither[5]) >> shift)); \
652 wfunc(&dst[j + 6], clip((rfunc(&src[j + 6]) + dither[6]) >> shift)); \
653 wfunc(&dst[j + 7], clip((rfunc(&src[j + 7]) + dither[7]) >> shift)); \
655 for (; j < length; j++) \
656 wfunc(&dst[j], (rfunc(&src[j]) + dither[j & 7]) >> shift); \
661 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
662 int srcStride[], int srcSliceY, int srcSliceH,
663 uint8_t *dst[], int dstStride[])
665 const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
666 const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
668 for (plane = 0; plane < 4; plane++) {
669 int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
670 int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
671 int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
672 const uint8_t *srcPtr = src[plane];
673 uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
677 // ignore palette for GRAY8
678 if (plane == 1 && !dst[2]) continue;
679 if (!src[plane] || (plane == 1 && !src[2])) {
680 if (is16BPS(c->dstFormat))
682 fillPlane(dst[plane], dstStride[plane], length, height, y,
683 (plane == 3) ? 255 : 128);
685 if (is9_OR_10BPS(c->srcFormat)) {
686 const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
687 const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
688 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
690 if (is16BPS(c->dstFormat)) {
691 uint16_t *dstPtr2 = (uint16_t *) dstPtr;
692 #define COPY9_OR_10TO16(rfunc, wfunc) \
693 for (i = 0; i < height; i++) { \
694 for (j = 0; j < length; j++) { \
695 int srcpx = rfunc(&srcPtr2[j]); \
696 wfunc(&dstPtr2[j], (srcpx << (16 - src_depth)) | (srcpx >> (2 * src_depth - 16))); \
698 dstPtr2 += dstStride[plane] / 2; \
699 srcPtr2 += srcStride[plane] / 2; \
701 if (isBE(c->dstFormat)) {
702 if (isBE(c->srcFormat)) {
703 COPY9_OR_10TO16(AV_RB16, AV_WB16);
705 COPY9_OR_10TO16(AV_RL16, AV_WB16);
708 if (isBE(c->srcFormat)) {
709 COPY9_OR_10TO16(AV_RB16, AV_WL16);
711 COPY9_OR_10TO16(AV_RL16, AV_WL16);
714 } else if (is9_OR_10BPS(c->dstFormat)) {
715 uint16_t *dstPtr2 = (uint16_t *) dstPtr;
716 #define COPY9_OR_10TO9_OR_10(loop) \
717 for (i = 0; i < height; i++) { \
718 for (j = 0; j < length; j++) { \
721 dstPtr2 += dstStride[plane] / 2; \
722 srcPtr2 += srcStride[plane] / 2; \
724 #define COPY9_OR_10TO9_OR_10_2(rfunc, wfunc) \
725 if (dst_depth > src_depth) { \
726 COPY9_OR_10TO9_OR_10(int srcpx = rfunc(&srcPtr2[j]); \
727 wfunc(&dstPtr2[j], (srcpx << 1) | (srcpx >> 9))); \
728 } else if (dst_depth < src_depth) { \
729 DITHER_COPY(dstPtr2, dstStride[plane] / 2, wfunc, \
730 srcPtr2, srcStride[plane] / 2, rfunc, \
731 dither_8x8_1, 1, clip9); \
733 COPY9_OR_10TO9_OR_10(wfunc(&dstPtr2[j], rfunc(&srcPtr2[j]))); \
735 if (isBE(c->dstFormat)) {
736 if (isBE(c->srcFormat)) {
737 COPY9_OR_10TO9_OR_10_2(AV_RB16, AV_WB16);
739 COPY9_OR_10TO9_OR_10_2(AV_RL16, AV_WB16);
742 if (isBE(c->srcFormat)) {
743 COPY9_OR_10TO9_OR_10_2(AV_RB16, AV_WL16);
745 COPY9_OR_10TO9_OR_10_2(AV_RL16, AV_WL16);
749 #define W8(a, b) { *(a) = (b); }
750 #define COPY9_OR_10TO8(rfunc) \
751 if (src_depth == 9) { \
752 DITHER_COPY(dstPtr, dstStride[plane], W8, \
753 srcPtr2, srcStride[plane] / 2, rfunc, \
754 dither_8x8_1, 1, av_clip_uint8); \
756 DITHER_COPY(dstPtr, dstStride[plane], W8, \
757 srcPtr2, srcStride[plane] / 2, rfunc, \
758 dither_8x8_3, 2, av_clip_uint8); \
760 if (isBE(c->srcFormat)) {
761 COPY9_OR_10TO8(AV_RB16);
763 COPY9_OR_10TO8(AV_RL16);
766 } else if (is9_OR_10BPS(c->dstFormat)) {
767 const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
768 uint16_t *dstPtr2 = (uint16_t *) dstPtr;
770 if (is16BPS(c->srcFormat)) {
771 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
772 #define COPY16TO9_OR_10(rfunc, wfunc) \
773 if (dst_depth == 9) { \
774 DITHER_COPY(dstPtr2, dstStride[plane] / 2, wfunc, \
775 srcPtr2, srcStride[plane] / 2, rfunc, \
776 dither_8x8_128, 7, clip9); \
778 DITHER_COPY(dstPtr2, dstStride[plane] / 2, wfunc, \
779 srcPtr2, srcStride[plane] / 2, rfunc, \
780 dither_8x8_64, 6, clip10); \
782 if (isBE(c->dstFormat)) {
783 if (isBE(c->srcFormat)) {
784 COPY16TO9_OR_10(AV_RB16, AV_WB16);
786 COPY16TO9_OR_10(AV_RL16, AV_WB16);
789 if (isBE(c->srcFormat)) {
790 COPY16TO9_OR_10(AV_RB16, AV_WL16);
792 COPY16TO9_OR_10(AV_RL16, AV_WL16);
796 #define COPY8TO9_OR_10(wfunc) \
797 for (i = 0; i < height; i++) { \
798 for (j = 0; j < length; j++) { \
799 const int srcpx = srcPtr[j]; \
800 wfunc(&dstPtr2[j], (srcpx << (dst_depth - 8)) | (srcpx >> (16 - dst_depth))); \
802 dstPtr2 += dstStride[plane] / 2; \
803 srcPtr += srcStride[plane]; \
805 if (isBE(c->dstFormat)) {
806 COPY8TO9_OR_10(AV_WB16);
808 COPY8TO9_OR_10(AV_WL16);
811 } else if (is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)) {
812 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
813 #define COPY16TO8(rfunc) \
814 DITHER_COPY(dstPtr, dstStride[plane], W8, \
815 srcPtr2, srcStride[plane] / 2, rfunc, \
816 dither_8x8_256, 8, av_clip_uint8);
817 if (isBE(c->srcFormat)) {
822 } else if (!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)) {
823 for (i = 0; i < height; i++) {
824 for (j = 0; j < length; j++) {
825 dstPtr[ j << 1 ] = srcPtr[j];
826 dstPtr[(j << 1) + 1] = srcPtr[j];
828 srcPtr += srcStride[plane];
829 dstPtr += dstStride[plane];
831 } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
832 isBE(c->srcFormat) != isBE(c->dstFormat)) {
834 for (i = 0; i < height; i++) {
835 for (j = 0; j < length; j++)
836 ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
837 srcPtr += srcStride[plane];
838 dstPtr += dstStride[plane];
840 } else if (dstStride[plane] == srcStride[plane] &&
841 srcStride[plane] > 0 && srcStride[plane] == length) {
842 memcpy(dst[plane] + dstStride[plane] * y, src[plane],
843 height * dstStride[plane]);
845 if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
847 else if (!desc_src->comp[0].depth_minus1)
848 length >>= 3; // monowhite/black
849 for (i = 0; i < height; i++) {
850 memcpy(dstPtr, srcPtr, length);
851 srcPtr += srcStride[plane];
852 dstPtr += dstStride[plane];
861 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
862 ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
863 (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
866 void ff_get_unscaled_swscale(SwsContext *c)
868 const enum AVPixelFormat srcFormat = c->srcFormat;
869 const enum AVPixelFormat dstFormat = c->dstFormat;
870 const int flags = c->flags;
871 const int dstH = c->dstH;
874 needsDither = isAnyRGB(dstFormat) &&
875 c->dstFormatBpp < 24 &&
876 (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
879 if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
880 (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
881 c->swScale = planarToNv12Wrapper;
884 if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
885 srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
886 !(flags & SWS_ACCURATE_RND) && !(dstH & 1)) {
887 c->swScale = ff_yuv2rgb_get_func_ptr(c);
890 if (srcFormat == AV_PIX_FMT_YUV410P &&
891 (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
892 !(flags & SWS_BITEXACT)) {
893 c->swScale = yvu9ToYv12Wrapper;
897 if (srcFormat == AV_PIX_FMT_BGR24 &&
898 (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
899 !(flags & SWS_ACCURATE_RND))
900 c->swScale = bgr24ToYv12Wrapper;
902 /* RGB/BGR -> RGB/BGR (no dither needed forms) */
903 if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
904 && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
905 c->swScale= rgbToRgbWrapper;
907 if (isPlanarRGB(srcFormat) && isPackedRGB(dstFormat))
908 c->swScale = planarRgbToRgbWrapper;
910 /* bswap 16 bits per pixel/component packed formats */
911 if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
912 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||
913 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
914 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
915 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
916 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
917 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48) ||
918 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
919 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))
920 c->swScale = packed_16bpc_bswap;
922 if ((usePal(srcFormat) && (
923 dstFormat == AV_PIX_FMT_RGB32 ||
924 dstFormat == AV_PIX_FMT_RGB32_1 ||
925 dstFormat == AV_PIX_FMT_RGB24 ||
926 dstFormat == AV_PIX_FMT_BGR32 ||
927 dstFormat == AV_PIX_FMT_BGR32_1 ||
928 dstFormat == AV_PIX_FMT_BGR24)))
929 c->swScale = palToRgbWrapper;
931 if (srcFormat == AV_PIX_FMT_YUV422P) {
932 if (dstFormat == AV_PIX_FMT_YUYV422)
933 c->swScale = yuv422pToYuy2Wrapper;
934 else if (dstFormat == AV_PIX_FMT_UYVY422)
935 c->swScale = yuv422pToUyvyWrapper;
938 /* LQ converters if -sws 0 or -sws 4*/
939 if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
941 if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
942 if (dstFormat == AV_PIX_FMT_YUYV422)
943 c->swScale = planarToYuy2Wrapper;
944 else if (dstFormat == AV_PIX_FMT_UYVY422)
945 c->swScale = planarToUyvyWrapper;
948 if (srcFormat == AV_PIX_FMT_YUYV422 &&
949 (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
950 c->swScale = yuyvToYuv420Wrapper;
951 if (srcFormat == AV_PIX_FMT_UYVY422 &&
952 (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
953 c->swScale = uyvyToYuv420Wrapper;
954 if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
955 c->swScale = yuyvToYuv422Wrapper;
956 if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
957 c->swScale = uyvyToYuv422Wrapper;
960 if ( srcFormat == dstFormat ||
961 (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
962 (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
963 (isPlanarYUV(srcFormat) && isGray(dstFormat)) ||
964 (isPlanarYUV(dstFormat) && isGray(srcFormat)) ||
965 (isGray(dstFormat) && isGray(srcFormat)) ||
966 (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
967 c->chrDstHSubSample == c->chrSrcHSubSample &&
968 c->chrDstVSubSample == c->chrSrcVSubSample &&
969 dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
970 srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
972 if (isPacked(c->srcFormat))
973 c->swScale = packedCopyWrapper;
974 else /* Planar YUV or gray */
975 c->swScale = planarCopyWrapper;
979 ff_bfin_get_unscaled_swscale(c);
981 ff_swscale_get_unscaled_altivec(c);
984 static void reset_ptr(const uint8_t *src[], int format)
986 if (!isALPHA(format))
988 if (!isPlanar(format)) {
989 src[3] = src[2] = NULL;
996 static int check_image_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt,
997 const int linesizes[4])
999 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
1002 for (i = 0; i < 4; i++) {
1003 int plane = desc->comp[i].plane;
1004 if (!data[plane] || !linesizes[plane])
1012 * swscale wrapper, so we don't need to export the SwsContext.
1013 * Assumes planar YUV to be in YUV order instead of YVU.
1015 int attribute_align_arg sws_scale(struct SwsContext *c,
1016 const uint8_t * const srcSlice[],
1017 const int srcStride[], int srcSliceY,
1018 int srcSliceH, uint8_t *const dst[],
1019 const int dstStride[])
1022 const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] };
1023 uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] };
1025 // do not mess up sliceDir if we have a "trailing" 0-size slice
1029 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
1030 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
1033 if (!check_image_pointers(dst, c->dstFormat, dstStride)) {
1034 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
1038 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
1039 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
1042 if (c->sliceDir == 0) {
1043 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
1046 if (usePal(c->srcFormat)) {
1047 for (i = 0; i < 256; i++) {
1048 int p, r, g, b, y, u, v;
1049 if (c->srcFormat == AV_PIX_FMT_PAL8) {
1050 p = ((const uint32_t *)(srcSlice[1]))[i];
1051 r = (p >> 16) & 0xFF;
1052 g = (p >> 8) & 0xFF;
1054 } else if (c->srcFormat == AV_PIX_FMT_RGB8) {
1055 r = ( i >> 5 ) * 36;
1056 g = ((i >> 2) & 7) * 36;
1058 } else if (c->srcFormat == AV_PIX_FMT_BGR8) {
1059 b = ( i >> 6 ) * 85;
1060 g = ((i >> 3) & 7) * 36;
1062 } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {
1063 r = ( i >> 3 ) * 255;
1064 g = ((i >> 1) & 3) * 85;
1066 } else if (c->srcFormat == AV_PIX_FMT_GRAY8 ||
1067 c->srcFormat == AV_PIX_FMT_Y400A) {
1070 assert(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);
1071 b = ( i >> 3 ) * 255;
1072 g = ((i >> 1) & 3) * 85;
1075 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1076 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1077 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1078 c->pal_yuv[i] = y + (u << 8) + (v << 16);
1080 switch (c->dstFormat) {
1081 case AV_PIX_FMT_BGR32:
1083 case AV_PIX_FMT_RGB24:
1085 c->pal_rgb[i] = r + (g << 8) + (b << 16);
1087 case AV_PIX_FMT_BGR32_1:
1089 case AV_PIX_FMT_BGR24:
1091 c->pal_rgb[i] = (r + (g << 8) + (b << 16)) << 8;
1093 case AV_PIX_FMT_RGB32_1:
1095 case AV_PIX_FMT_RGB24:
1097 c->pal_rgb[i] = (b + (g << 8) + (r << 16)) << 8;
1099 case AV_PIX_FMT_RGB32:
1101 case AV_PIX_FMT_BGR24:
1104 c->pal_rgb[i] = b + (g << 8) + (r << 16);
1109 // copy strides, so they can safely be modified
1110 if (c->sliceDir == 1) {
1111 // slices go from top to bottom
1112 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
1114 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
1117 reset_ptr(src2, c->srcFormat);
1118 reset_ptr((const uint8_t **) dst2, c->dstFormat);
1120 /* reset slice direction at end of frame */
1121 if (srcSliceY + srcSliceH == c->srcH)
1124 return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
1127 // slices go from bottom to top => we flip the image internally
1128 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
1130 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
1133 src2[0] += (srcSliceH - 1) * srcStride[0];
1134 if (!usePal(c->srcFormat))
1135 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
1136 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
1137 src2[3] += (srcSliceH - 1) * srcStride[3];
1138 dst2[0] += ( c->dstH - 1) * dstStride[0];
1139 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
1140 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
1141 dst2[3] += ( c->dstH - 1) * dstStride[3];
1143 reset_ptr(src2, c->srcFormat);
1144 reset_ptr((const uint8_t **) dst2, c->dstFormat);
1146 /* reset slice direction at end of frame */
1150 return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
1151 srcSliceH, dst2, dstStride2);
1155 /* Convert the palette to the same packed 32-bit format as the palette */
1156 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1157 int num_pixels, const uint8_t *palette)
1161 for (i = 0; i < num_pixels; i++)
1162 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1165 /* Palette format: ABCD -> dst format: ABC */
1166 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1167 int num_pixels, const uint8_t *palette)
1171 for (i = 0; i < num_pixels; i++) {
1173 dst[0] = palette[src[i] * 4 + 0];
1174 dst[1] = palette[src[i] * 4 + 1];
1175 dst[2] = palette[src[i] * 4 + 2];