2 * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 #define RGB2YUV_SHIFT 15
38 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
39 #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
40 #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
41 #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
42 #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
43 #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
44 #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
45 #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
46 #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
48 DECLARE_ALIGNED(8, const uint8_t, dithers)[8][8][8]={
50 { 0, 1, 0, 1, 0, 1, 0, 1,},
51 { 1, 0, 1, 0, 1, 0, 1, 0,},
52 { 0, 1, 0, 1, 0, 1, 0, 1,},
53 { 1, 0, 1, 0, 1, 0, 1, 0,},
54 { 0, 1, 0, 1, 0, 1, 0, 1,},
55 { 1, 0, 1, 0, 1, 0, 1, 0,},
56 { 0, 1, 0, 1, 0, 1, 0, 1,},
57 { 1, 0, 1, 0, 1, 0, 1, 0,},
59 { 1, 2, 1, 2, 1, 2, 1, 2,},
60 { 3, 0, 3, 0, 3, 0, 3, 0,},
61 { 1, 2, 1, 2, 1, 2, 1, 2,},
62 { 3, 0, 3, 0, 3, 0, 3, 0,},
63 { 1, 2, 1, 2, 1, 2, 1, 2,},
64 { 3, 0, 3, 0, 3, 0, 3, 0,},
65 { 1, 2, 1, 2, 1, 2, 1, 2,},
66 { 3, 0, 3, 0, 3, 0, 3, 0,},
68 { 2, 4, 3, 5, 2, 4, 3, 5,},
69 { 6, 0, 7, 1, 6, 0, 7, 1,},
70 { 3, 5, 2, 4, 3, 5, 2, 4,},
71 { 7, 1, 6, 0, 7, 1, 6, 0,},
72 { 2, 4, 3, 5, 2, 4, 3, 5,},
73 { 6, 0, 7, 1, 6, 0, 7, 1,},
74 { 3, 5, 2, 4, 3, 5, 2, 4,},
75 { 7, 1, 6, 0, 7, 1, 6, 0,},
77 { 4, 8, 7, 11, 4, 8, 7, 11,},
78 { 12, 0, 15, 3, 12, 0, 15, 3,},
79 { 6, 10, 5, 9, 6, 10, 5, 9,},
80 { 14, 2, 13, 1, 14, 2, 13, 1,},
81 { 4, 8, 7, 11, 4, 8, 7, 11,},
82 { 12, 0, 15, 3, 12, 0, 15, 3,},
83 { 6, 10, 5, 9, 6, 10, 5, 9,},
84 { 14, 2, 13, 1, 14, 2, 13, 1,},
86 { 9, 17, 15, 23, 8, 16, 14, 22,},
87 { 25, 1, 31, 7, 24, 0, 30, 6,},
88 { 13, 21, 11, 19, 12, 20, 10, 18,},
89 { 29, 5, 27, 3, 28, 4, 26, 2,},
90 { 8, 16, 14, 22, 9, 17, 15, 23,},
91 { 24, 0, 30, 6, 25, 1, 31, 7,},
92 { 12, 20, 10, 18, 13, 21, 11, 19,},
93 { 28, 4, 26, 2, 29, 5, 27, 3,},
95 { 18, 34, 30, 46, 17, 33, 29, 45,},
96 { 50, 2, 62, 14, 49, 1, 61, 13,},
97 { 26, 42, 22, 38, 25, 41, 21, 37,},
98 { 58, 10, 54, 6, 57, 9, 53, 5,},
99 { 16, 32, 28, 44, 19, 35, 31, 47,},
100 { 48, 0, 60, 12, 51, 3, 63, 15,},
101 { 24, 40, 20, 36, 27, 43, 23, 39,},
102 { 56, 8, 52, 4, 59, 11, 55, 7,},
104 { 18, 34, 30, 46, 17, 33, 29, 45,},
105 { 50, 2, 62, 14, 49, 1, 61, 13,},
106 { 26, 42, 22, 38, 25, 41, 21, 37,},
107 { 58, 10, 54, 6, 57, 9, 53, 5,},
108 { 16, 32, 28, 44, 19, 35, 31, 47,},
109 { 48, 0, 60, 12, 51, 3, 63, 15,},
110 { 24, 40, 20, 36, 27, 43, 23, 39,},
111 { 56, 8, 52, 4, 59, 11, 55, 7,},
113 { 36, 68, 60, 92, 34, 66, 58, 90,},
114 { 100, 4,124, 28, 98, 2,122, 26,},
115 { 52, 84, 44, 76, 50, 82, 42, 74,},
116 { 116, 20,108, 12,114, 18,106, 10,},
117 { 32, 64, 56, 88, 38, 70, 62, 94,},
118 { 96, 0,120, 24,102, 6,126, 30,},
119 { 48, 80, 40, 72, 54, 86, 46, 78,},
120 { 112, 16,104, 8,118, 22,110, 14,},
123 static const uint8_t flat64[8]={64,64,64,64,64,64,64,64};
125 const uint16_t dither_scale[15][16]={
126 { 2, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,},
127 { 2, 3, 7, 7, 13, 13, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,},
128 { 3, 3, 4, 15, 15, 29, 57, 57, 57, 113, 113, 113, 113, 113, 113, 113,},
129 { 3, 4, 4, 5, 31, 31, 61, 121, 241, 241, 241, 241, 481, 481, 481, 481,},
130 { 3, 4, 5, 5, 6, 63, 63, 125, 249, 497, 993, 993, 993, 993, 993, 1985,},
131 { 3, 5, 6, 6, 6, 7, 127, 127, 253, 505, 1009, 2017, 4033, 4033, 4033, 4033,},
132 { 3, 5, 6, 7, 7, 7, 8, 255, 255, 509, 1017, 2033, 4065, 8129,16257,16257,},
133 { 3, 5, 6, 8, 8, 8, 8, 9, 511, 511, 1021, 2041, 4081, 8161,16321,32641,},
134 { 3, 5, 7, 8, 9, 9, 9, 9, 10, 1023, 1023, 2045, 4089, 8177,16353,32705,},
135 { 3, 5, 7, 8, 10, 10, 10, 10, 10, 11, 2047, 2047, 4093, 8185,16369,32737,},
136 { 3, 5, 7, 8, 10, 11, 11, 11, 11, 11, 12, 4095, 4095, 8189,16377,32753,},
137 { 3, 5, 7, 9, 10, 12, 12, 12, 12, 12, 12, 13, 8191, 8191,16381,32761,},
138 { 3, 5, 7, 9, 10, 12, 13, 13, 13, 13, 13, 13, 14,16383,16383,32765,},
139 { 3, 5, 7, 9, 10, 12, 14, 14, 14, 14, 14, 14, 14, 15,32767,32767,},
140 { 3, 5, 7, 9, 11, 12, 14, 15, 15, 15, 15, 15, 15, 15, 16,65535,},
144 static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,
148 uint8_t *ptr = plane + stride * y;
149 for (i = 0; i < height; i++) {
150 memset(ptr, val, width);
155 static void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
159 uint8_t *ptr = plane + stride * y;
160 int v = alpha ? -1 : (1<<bits);
161 for (i = 0; i < height; i++) {
162 for (j = 0; j < width; j++) {
169 static void copyPlane(const uint8_t *src, int srcStride,
170 int srcSliceY, int srcSliceH, int width,
171 uint8_t *dst, int dstStride)
173 dst += dstStride * srcSliceY;
174 if (dstStride == srcStride && srcStride > 0) {
175 memcpy(dst, src, srcSliceH * dstStride);
178 for (i = 0; i < srcSliceH; i++) {
179 memcpy(dst, src, width);
186 static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
187 int srcStride[], int srcSliceY,
188 int srcSliceH, uint8_t *dstParam[],
191 uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;
193 copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
194 dstParam[0], dstStride[0]);
196 if (c->dstFormat == PIX_FMT_NV12)
197 interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,
198 srcStride[1], srcStride[2], dstStride[0]);
200 interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,
201 srcStride[2], srcStride[1], dstStride[0]);
206 static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
207 int srcStride[], int srcSliceY, int srcSliceH,
208 uint8_t *dstParam[], int dstStride[])
210 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
212 yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
213 srcStride[1], dstStride[0]);
218 static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],
219 int srcStride[], int srcSliceY, int srcSliceH,
220 uint8_t *dstParam[], int dstStride[])
222 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
224 yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
225 srcStride[1], dstStride[0]);
230 static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
231 int srcStride[], int srcSliceY, int srcSliceH,
232 uint8_t *dstParam[], int dstStride[])
234 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
236 yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
237 srcStride[1], dstStride[0]);
242 static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],
243 int srcStride[], int srcSliceY, int srcSliceH,
244 uint8_t *dstParam[], int dstStride[])
246 uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
248 yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
249 srcStride[1], dstStride[0]);
254 static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
255 int srcStride[], int srcSliceY, int srcSliceH,
256 uint8_t *dstParam[], int dstStride[])
258 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
259 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
260 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
262 yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
263 dstStride[1], srcStride[0]);
266 fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
271 static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
272 int srcStride[], int srcSliceY, int srcSliceH,
273 uint8_t *dstParam[], int dstStride[])
275 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
276 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
277 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
279 yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
280 dstStride[1], srcStride[0]);
285 static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
286 int srcStride[], int srcSliceY, int srcSliceH,
287 uint8_t *dstParam[], int dstStride[])
289 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
290 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
291 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
293 uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
294 dstStride[1], srcStride[0]);
297 fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
302 static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
303 int srcStride[], int srcSliceY, int srcSliceH,
304 uint8_t *dstParam[], int dstStride[])
306 uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
307 uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
308 uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
310 uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
311 dstStride[1], srcStride[0]);
316 static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,
317 const uint8_t *palette)
320 for (i = 0; i < num_pixels; i++)
321 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);
324 static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,
325 const uint8_t *palette)
329 for (i = 0; i < num_pixels; i++)
330 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];
333 static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,
334 const uint8_t *palette)
338 for (i = 0; i < num_pixels; i++) {
340 dst[0] = palette[src[i << 1] * 4 + 0];
341 dst[1] = palette[src[i << 1] * 4 + 1];
342 dst[2] = palette[src[i << 1] * 4 + 2];
347 static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
348 int srcStride[], int srcSliceY, int srcSliceH,
349 uint8_t *dst[], int dstStride[])
352 int srcstr = srcStride[0] >> 1;
353 int dststr = dstStride[0] >> 1;
354 uint16_t *dstPtr = (uint16_t *) dst[0];
355 const uint16_t *srcPtr = (const uint16_t *) src[0];
356 int min_stride = FFMIN(srcstr, dststr);
358 for (i = 0; i < srcSliceH; i++) {
359 for (j = 0; j < min_stride; j++) {
360 dstPtr[j] = av_bswap16(srcPtr[j]);
369 static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
370 int srcSliceY, int srcSliceH, uint8_t *dst[],
373 const enum PixelFormat srcFormat = c->srcFormat;
374 const enum PixelFormat dstFormat = c->dstFormat;
375 void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
376 const uint8_t *palette) = NULL;
378 uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
379 const uint8_t *srcPtr = src[0];
381 if (srcFormat == PIX_FMT_GRAY8A) {
383 case PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
384 case PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
385 case PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
386 case PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
387 case PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
388 case PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
390 } else if (usePal(srcFormat)) {
392 case PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
393 case PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
394 case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
395 case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
396 case PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
397 case PIX_FMT_BGR24 : conv = sws_convertPalette8ToPacked24; break;
402 av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
403 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
405 for (i = 0; i < srcSliceH; i++) {
406 conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
407 srcPtr += srcStride[0];
408 dstPtr += dstStride[0];
415 static void gbr24ptopacked24(const uint8_t* src[], int srcStride[], uint8_t* dst, int dstStride, int srcSliceH, int width)
418 for (h = 0; h < srcSliceH; h++) {
419 uint8_t *dest = dst + dstStride * h;
420 for (x = 0; x < width; x++) {
426 for (i = 0; i < 3; i++)
427 src[i] += srcStride[i];
431 static void gbr24ptopacked32(const uint8_t* src[], int srcStride[], uint8_t* dst, int dstStride, int srcSliceH, int alpha_first, int width)
434 for (h = 0; h < srcSliceH; h++) {
435 uint8_t *dest = dst + dstStride * h;
438 for (x = 0; x < width; x++) {
445 for (x = 0; x < width; x++) {
453 for (i = 0; i < 3; i++)
454 src[i] += srcStride[i];
458 static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
459 int srcSliceH, uint8_t* dst[], int dstStride[])
462 if (c->srcFormat != PIX_FMT_GBR24P) {
463 av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
464 av_get_pix_fmt_name(c->srcFormat), av_get_pix_fmt_name(c->dstFormat));
468 switch (c->dstFormat) {
470 gbr24ptopacked24((const uint8_t* []) {src[1], src[0], src[2]}, (int []) {srcStride[1], srcStride[0], srcStride[2]},
471 dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, c->srcW);
475 gbr24ptopacked24((const uint8_t* []) {src[2], src[0], src[1]}, (int []) {srcStride[2], srcStride[0], srcStride[1]},
476 dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, c->srcW);
482 gbr24ptopacked32((const uint8_t* []) {src[2], src[0], src[1]}, (int []) {srcStride[2], srcStride[0], srcStride[1]},
483 dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, alpha_first, c->srcW);
489 gbr24ptopacked32((const uint8_t* []) {src[1], src[0], src[2]}, (int []) {srcStride[1], srcStride[0], srcStride[2]},
490 dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, alpha_first, c->srcW);
494 av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
495 av_get_pix_fmt_name(c->srcFormat), av_get_pix_fmt_name(c->dstFormat));
501 #define isRGBA32(x) ( \
502 (x) == PIX_FMT_ARGB \
503 || (x) == PIX_FMT_RGBA \
504 || (x) == PIX_FMT_BGRA \
505 || (x) == PIX_FMT_ABGR \
508 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
509 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
510 static rgbConvFn findRgbConvFn(SwsContext *c)
512 const enum PixelFormat srcFormat = c->srcFormat;
513 const enum PixelFormat dstFormat = c->dstFormat;
514 const int srcId = c->srcFormatBpp;
515 const int dstId = c->dstFormatBpp;
516 rgbConvFn conv = NULL;
518 #define IS_NOT_NE(bpp, fmt) \
519 (((bpp + 7) >> 3) == 2 && \
520 (!(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
522 /* if this is non-native rgb444/555/565, don't handle it here. */
523 if (IS_NOT_NE(srcId, srcFormat) || IS_NOT_NE(dstId, dstFormat))
526 #define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)
528 if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
529 if ( CONV_IS(ABGR, RGBA)
530 || CONV_IS(ARGB, BGRA)
531 || CONV_IS(BGRA, ARGB)
532 || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
533 else if (CONV_IS(ABGR, ARGB)
534 || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
535 else if (CONV_IS(ABGR, BGRA)
536 || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
537 else if (CONV_IS(BGRA, RGBA)
538 || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
539 else if (CONV_IS(BGRA, ABGR)
540 || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
543 if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
544 (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
545 switch (srcId | (dstId << 16)) {
546 case 0x000F000C: conv = rgb12to15; break;
547 case 0x000F0010: conv = rgb16to15; break;
548 case 0x000F0018: conv = rgb24to15; break;
549 case 0x000F0020: conv = rgb32to15; break;
550 case 0x0010000F: conv = rgb15to16; break;
551 case 0x00100018: conv = rgb24to16; break;
552 case 0x00100020: conv = rgb32to16; break;
553 case 0x0018000F: conv = rgb15to24; break;
554 case 0x00180010: conv = rgb16to24; break;
555 case 0x00180020: conv = rgb32to24; break;
556 case 0x0020000F: conv = rgb15to32; break;
557 case 0x00200010: conv = rgb16to32; break;
558 case 0x00200018: conv = rgb24to32; break;
560 } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
561 (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
562 switch (srcId | (dstId << 16)) {
563 case 0x000C000C: conv = rgb12tobgr12; break;
564 case 0x000F000F: conv = rgb15tobgr15; break;
565 case 0x000F0010: conv = rgb16tobgr15; break;
566 case 0x000F0018: conv = rgb24tobgr15; break;
567 case 0x000F0020: conv = rgb32tobgr15; break;
568 case 0x0010000F: conv = rgb15tobgr16; break;
569 case 0x00100010: conv = rgb16tobgr16; break;
570 case 0x00100018: conv = rgb24tobgr16; break;
571 case 0x00100020: conv = rgb32tobgr16; break;
572 case 0x0018000F: conv = rgb15tobgr24; break;
573 case 0x00180010: conv = rgb16tobgr24; break;
574 case 0x00180018: conv = rgb24tobgr24; break;
575 case 0x00180020: conv = rgb32tobgr24; break;
576 case 0x0020000F: conv = rgb15tobgr32; break;
577 case 0x00200010: conv = rgb16tobgr32; break;
578 case 0x00200018: conv = rgb24tobgr32; break;
585 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
586 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
587 int srcSliceY, int srcSliceH, uint8_t *dst[],
591 const enum PixelFormat srcFormat = c->srcFormat;
592 const enum PixelFormat dstFormat = c->dstFormat;
593 const int srcBpp = (c->srcFormatBpp + 7) >> 3;
594 const int dstBpp = (c->dstFormatBpp + 7) >> 3;
595 rgbConvFn conv = findRgbConvFn(c);
598 av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
599 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
601 const uint8_t *srcPtr = src[0];
602 uint8_t *dstPtr = dst[0];
603 if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) &&
604 !isRGBA32(dstFormat))
605 srcPtr += ALT32_CORR;
607 if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) &&
608 !isRGBA32(srcFormat))
609 dstPtr += ALT32_CORR;
611 if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
612 !(srcStride[0] % srcBpp))
613 conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
614 srcSliceH * srcStride[0]);
617 dstPtr += dstStride[0] * srcSliceY;
619 for (i = 0; i < srcSliceH; i++) {
620 conv(srcPtr, dstPtr, c->srcW * srcBpp);
621 srcPtr += srcStride[0];
622 dstPtr += dstStride[0];
629 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
630 int srcStride[], int srcSliceY, int srcSliceH,
631 uint8_t *dst[], int dstStride[])
635 dst[0] + srcSliceY * dstStride[0],
636 dst[1] + (srcSliceY >> 1) * dstStride[1],
637 dst[2] + (srcSliceY >> 1) * dstStride[2],
639 dstStride[0], dstStride[1], srcStride[0]);
641 fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
645 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
646 int srcStride[], int srcSliceY, int srcSliceH,
647 uint8_t *dst[], int dstStride[])
649 copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
650 dst[0], dstStride[0]);
652 planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
653 srcSliceH >> 2, srcStride[1], dstStride[1]);
654 planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
655 srcSliceH >> 2, srcStride[2], dstStride[2]);
657 fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
661 /* unscaled copy like stuff (assumes nearly identical formats) */
662 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
663 int srcStride[], int srcSliceY, int srcSliceH,
664 uint8_t *dst[], int dstStride[])
666 if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
667 memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
670 const uint8_t *srcPtr = src[0];
671 uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
674 /* universal length finder */
675 while (length + c->srcW <= FFABS(dstStride[0]) &&
676 length + c->srcW <= FFABS(srcStride[0]))
680 for (i = 0; i < srcSliceH; i++) {
681 memcpy(dstPtr, srcPtr, length);
682 srcPtr += srcStride[0];
683 dstPtr += dstStride[0];
689 #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
690 uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
691 int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
692 for (i = 0; i < height; i++) {\
693 const uint8_t *dither= dithers[src_depth-9][i&7];\
694 for (j = 0; j < length-7; j+=8){\
695 dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
696 dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
697 dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
698 dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
699 dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
700 dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
701 dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
702 dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
704 for (; j < length; j++)\
705 dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
710 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
711 int srcStride[], int srcSliceY, int srcSliceH,
712 uint8_t *dst[], int dstStride[])
715 for (plane = 0; plane < 4; plane++) {
716 int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
717 int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
718 int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
719 const uint8_t *srcPtr = src[plane];
720 uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
721 int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
725 // ignore palette for GRAY8
726 if (plane == 1 && !dst[2]) continue;
727 if (!src[plane] || (plane == 1 && !src[2])) {
728 if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
729 fillPlane16(dst[plane], dstStride[plane], length, height, y,
730 plane == 3, av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1);
732 fillPlane(dst[plane], dstStride[plane], length, height, y,
733 (plane == 3) ? 255 : 128);
736 if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
737 || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
739 const int src_depth = av_pix_fmt_descriptors[c->srcFormat].comp[plane].depth_minus1 + 1;
740 const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1 + 1;
741 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
742 uint16_t *dstPtr2 = (uint16_t*)dstPtr;
744 if (dst_depth == 8) {
745 if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
746 DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
748 DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
750 } else if (src_depth == 8) {
751 for (i = 0; i < height; i++) {
754 for (j = 0; j < length; j++)\
755 w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
757 for (j = 0; j < length; j++)\
758 w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
759 (srcPtr[j]>>(2*8-dst_depth)));\
761 if(isBE(c->dstFormat)){
766 dstPtr2 += dstStride[plane]/2;
767 srcPtr += srcStride[plane];
769 } else if (src_depth <= dst_depth) {
770 for (i = 0; i < height; i++) {
771 #define COPY_UP(r,w) \
773 for (j = 0; j < length; j++){ \
774 unsigned int v= r(&srcPtr2[j]);\
775 w(&dstPtr2[j], v<<(dst_depth-src_depth));\
778 for (j = 0; j < length; j++){ \
779 unsigned int v= r(&srcPtr2[j]);\
780 w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
781 (v>>(2*src_depth-dst_depth)));\
784 if(isBE(c->srcFormat)){
785 if(isBE(c->dstFormat)){
786 COPY_UP(AV_RB16, AV_WB16)
788 COPY_UP(AV_RB16, AV_WL16)
791 if(isBE(c->dstFormat)){
792 COPY_UP(AV_RL16, AV_WB16)
794 COPY_UP(AV_RL16, AV_WL16)
797 dstPtr2 += dstStride[plane]/2;
798 srcPtr2 += srcStride[plane]/2;
801 if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
802 if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
803 DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
805 DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
808 if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
809 DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
811 DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
815 } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
816 isBE(c->srcFormat) != isBE(c->dstFormat)) {
818 for (i = 0; i < height; i++) {
819 for (j = 0; j < length; j++)
820 ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
821 srcPtr += srcStride[plane];
822 dstPtr += dstStride[plane];
824 } else if (dstStride[plane] == srcStride[plane] &&
825 srcStride[plane] > 0 && srcStride[plane] == length) {
826 memcpy(dst[plane] + dstStride[plane] * y, src[plane],
827 height * dstStride[plane]);
829 if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
831 else if (!av_pix_fmt_descriptors[c->srcFormat].comp[0].depth_minus1)
832 length >>= 3; // monowhite/black
833 for (i = 0; i < height; i++) {
834 memcpy(dstPtr, srcPtr, length);
835 srcPtr += srcStride[plane];
836 dstPtr += dstStride[plane];
845 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
846 ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
847 (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
850 void ff_get_unscaled_swscale(SwsContext *c)
852 const enum PixelFormat srcFormat = c->srcFormat;
853 const enum PixelFormat dstFormat = c->dstFormat;
854 const int flags = c->flags;
855 const int dstH = c->dstH;
858 needsDither = isAnyRGB(dstFormat) &&
859 c->dstFormatBpp < 24 &&
860 (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
863 if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) &&
864 (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {
865 c->swScale = planarToNv12Wrapper;
868 if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUV422P ||
869 srcFormat == PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
870 !(flags & SWS_ACCURATE_RND) && !(dstH & 1)) {
871 c->swScale = ff_yuv2rgb_get_func_ptr(c);
874 if (srcFormat == PIX_FMT_YUV410P &&
875 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&
876 !(flags & SWS_BITEXACT)) {
877 c->swScale = yvu9ToYv12Wrapper;
881 if (srcFormat == PIX_FMT_BGR24 &&
882 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&
883 !(flags & SWS_ACCURATE_RND))
884 c->swScale = bgr24ToYv12Wrapper;
886 /* RGB/BGR -> RGB/BGR (no dither needed forms) */
887 if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
888 && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
889 c->swScale= rgbToRgbWrapper;
891 #define isByteRGB(f) (\
892 f == PIX_FMT_RGB32 ||\
893 f == PIX_FMT_RGB32_1 ||\
894 f == PIX_FMT_RGB24 ||\
895 f == PIX_FMT_BGR32 ||\
896 f == PIX_FMT_BGR32_1 ||\
899 if (isAnyRGB(srcFormat) && isPlanar(srcFormat) && isByteRGB(dstFormat))
900 c->swScale= planarRgbToRgbWrapper;
902 /* bswap 16 bits per pixel/component packed formats */
903 if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR444) ||
904 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR48) ||
905 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR555) ||
906 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR565) ||
907 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_GRAY16) ||
908 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB444) ||
909 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB48) ||
910 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB555) ||
911 IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB565))
912 c->swScale = packed_16bpc_bswap;
914 if (usePal(srcFormat) && isByteRGB(dstFormat))
915 c->swScale = palToRgbWrapper;
917 if (srcFormat == PIX_FMT_YUV422P) {
918 if (dstFormat == PIX_FMT_YUYV422)
919 c->swScale = yuv422pToYuy2Wrapper;
920 else if (dstFormat == PIX_FMT_UYVY422)
921 c->swScale = yuv422pToUyvyWrapper;
924 /* LQ converters if -sws 0 or -sws 4*/
925 if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
927 if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {
928 if (dstFormat == PIX_FMT_YUYV422)
929 c->swScale = planarToYuy2Wrapper;
930 else if (dstFormat == PIX_FMT_UYVY422)
931 c->swScale = planarToUyvyWrapper;
934 if (srcFormat == PIX_FMT_YUYV422 &&
935 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
936 c->swScale = yuyvToYuv420Wrapper;
937 if (srcFormat == PIX_FMT_UYVY422 &&
938 (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
939 c->swScale = uyvyToYuv420Wrapper;
940 if (srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)
941 c->swScale = yuyvToYuv422Wrapper;
942 if (srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
943 c->swScale = uyvyToYuv422Wrapper;
945 #define isPlanarGray(x) (isGray(x) && (x) != PIX_FMT_GRAY8A)
947 if ( srcFormat == dstFormat ||
948 (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P) ||
949 (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P) ||
950 (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
951 (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
952 (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
953 (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
954 c->chrDstHSubSample == c->chrSrcHSubSample &&
955 c->chrDstVSubSample == c->chrSrcVSubSample &&
956 dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21 &&
957 srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))
959 if (isPacked(c->srcFormat))
960 c->swScale = packedCopyWrapper;
961 else /* Planar YUV or gray */
962 c->swScale = planarCopyWrapper;
966 ff_bfin_get_unscaled_swscale(c);
968 ff_swscale_get_unscaled_altivec(c);
971 static void reset_ptr(const uint8_t *src[], int format)
973 if (!isALPHA(format))
975 if (!isPlanar(format)) {
976 src[3] = src[2] = NULL;
983 static int check_image_pointers(const uint8_t * const data[4], enum PixelFormat pix_fmt,
984 const int linesizes[4])
986 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
989 for (i = 0; i < 4; i++) {
990 int plane = desc->comp[i].plane;
991 if (!data[plane] || !linesizes[plane])
999 * swscale wrapper, so we don't need to export the SwsContext.
1000 * Assumes planar YUV to be in YUV order instead of YVU.
1002 int attribute_align_arg sws_scale(struct SwsContext *c,
1003 const uint8_t * const srcSlice[],
1004 const int srcStride[], int srcSliceY,
1005 int srcSliceH, uint8_t *const dst[],
1006 const int dstStride[])
1009 const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] };
1010 uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] };
1011 uint8_t *rgb0_tmp = NULL;
1013 // do not mess up sliceDir if we have a "trailing" 0-size slice
1017 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
1018 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
1021 if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
1022 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
1026 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
1027 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
1030 if (c->sliceDir == 0) {
1031 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
1034 if (usePal(c->srcFormat)) {
1035 for (i = 0; i < 256; i++) {
1036 int p, r, g, b, y, u, v, a = 0xff;
1037 if (c->srcFormat == PIX_FMT_PAL8) {
1038 p = ((const uint32_t *)(srcSlice[1]))[i];
1039 a = (p >> 24) & 0xFF;
1040 r = (p >> 16) & 0xFF;
1041 g = (p >> 8) & 0xFF;
1043 } else if (c->srcFormat == PIX_FMT_RGB8) {
1044 r = ( i >> 5 ) * 36;
1045 g = ((i >> 2) & 7) * 36;
1047 } else if (c->srcFormat == PIX_FMT_BGR8) {
1048 b = ( i >> 6 ) * 85;
1049 g = ((i >> 3) & 7) * 36;
1051 } else if (c->srcFormat == PIX_FMT_RGB4_BYTE) {
1052 r = ( i >> 3 ) * 255;
1053 g = ((i >> 1) & 3) * 85;
1055 } else if (c->srcFormat == PIX_FMT_GRAY8 || c->srcFormat == PIX_FMT_GRAY8A) {
1058 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
1059 b = ( i >> 3 ) * 255;
1060 g = ((i >> 1) & 3) * 85;
1063 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1064 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1065 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
1066 c->pal_yuv[i]= y + (u<<8) + (v<<16) + (a<<24);
1068 switch (c->dstFormat) {
1073 c->pal_rgb[i]= r + (g<<8) + (b<<16) + (a<<24);
1075 case PIX_FMT_BGR32_1:
1079 c->pal_rgb[i]= a + (r<<8) + (g<<16) + (b<<24);
1081 case PIX_FMT_RGB32_1:
1085 c->pal_rgb[i]= a + (b<<8) + (g<<16) + (r<<24);
1092 c->pal_rgb[i]= b + (g<<8) + (r<<16) + (a<<24);
1097 if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
1100 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
1101 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
1102 for (y=0; y<srcSliceH; y++){
1103 memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
1104 for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
1105 base[ srcStride[0]*y + x] = 0xFF;
1111 // copy strides, so they can safely be modified
1112 if (c->sliceDir == 1) {
1113 // slices go from top to bottom
1114 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
1116 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
1119 reset_ptr(src2, c->srcFormat);
1120 reset_ptr((void*)dst2, c->dstFormat);
1122 /* reset slice direction at end of frame */
1123 if (srcSliceY + srcSliceH == c->srcH)
1126 ret = c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
1129 // slices go from bottom to top => we flip the image internally
1130 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
1132 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
1135 src2[0] += (srcSliceH - 1) * srcStride[0];
1136 if (!usePal(c->srcFormat))
1137 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
1138 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
1139 src2[3] += (srcSliceH - 1) * srcStride[3];
1140 dst2[0] += ( c->dstH - 1) * dstStride[0];
1141 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
1142 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
1143 dst2[3] += ( c->dstH - 1) * dstStride[3];
1145 reset_ptr(src2, c->srcFormat);
1146 reset_ptr((void*)dst2, c->dstFormat);
1148 /* reset slice direction at end of frame */
1152 ret = c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
1153 srcSliceH, dst2, dstStride2);
1160 /* Convert the palette to the same packed 32-bit format as the palette */
1161 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1162 int num_pixels, const uint8_t *palette)
1166 for (i = 0; i < num_pixels; i++)
1167 ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1170 /* Palette format: ABCD -> dst format: ABC */
1171 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1172 int num_pixels, const uint8_t *palette)
1176 for (i = 0; i < num_pixels; i++) {
1178 dst[0] = palette[src[i] * 4 + 0];
1179 dst[1] = palette[src[i] * 4 + 1];
1180 dst[2] = palette[src[i] * 4 + 2];