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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libswscale / swscale.c
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2ba45a60
DM		 1/*
2 * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21#include <inttypes.h>
22#include <math.h>
23#include <stdio.h>
24#include <string.h>
25
26#include "libavutil/avassert.h"
27#include "libavutil/avutil.h"
28#include "libavutil/bswap.h"
29#include "libavutil/cpu.h"
30#include "libavutil/intreadwrite.h"
31#include "libavutil/mathematics.h"
32#include "libavutil/pixdesc.h"
33#include "config.h"
34#include "rgb2rgb.h"
35#include "swscale_internal.h"
36#include "swscale.h"
37
38DECLARE_ALIGNED(8, const uint8_t, ff_dither_8x8_128)[9][8] = {
39 { 36, 68, 60, 92, 34, 66, 58, 90, },
40 { 100, 4, 124, 28, 98, 2, 122, 26, },
41 { 52, 84, 44, 76, 50, 82, 42, 74, },
42 { 116, 20, 108, 12, 114, 18, 106, 10, },
43 { 32, 64, 56, 88, 38, 70, 62, 94, },
44 { 96, 0, 120, 24, 102, 6, 126, 30, },
45 { 48, 80, 40, 72, 54, 86, 46, 78, },
46 { 112, 16, 104, 8, 118, 22, 110, 14, },
47 { 36, 68, 60, 92, 34, 66, 58, 90, },
48};
49
50DECLARE_ALIGNED(8, static const uint8_t, sws_pb_64)[8] = {
51 64, 64, 64, 64, 64, 64, 64, 64
52};
53
54static av_always_inline void fillPlane(uint8_t *plane, int stride, int width,
55 int height, int y, uint8_t val)
56{
57 int i;
58 uint8_t *ptr = plane + stride * y;
59 for (i = 0; i < height; i++) {
60 memset(ptr, val, width);
61 ptr += stride;
62 }
63}
64
65static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
66 const uint8_t *_src, const int16_t *filter,
67 const int32_t *filterPos, int filterSize)
68{
69 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
70 int i;
71 int32_t *dst = (int32_t *) _dst;
72 const uint16_t *src = (const uint16_t *) _src;
73 int bits = desc->comp[0].depth_minus1;
74 int sh = bits - 4;
75
76 if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth_minus1<15)
77 sh= 9;
78
79 for (i = 0; i < dstW; i++) {
80 int j;
81 int srcPos = filterPos[i];
82 int val = 0;
83
84 for (j = 0; j < filterSize; j++) {
85 val += src[srcPos + j] * filter[filterSize * i + j];
86 }
87 // filter=14 bit, input=16 bit, output=30 bit, >> 11 makes 19 bit
88 dst[i] = FFMIN(val >> sh, (1 << 19) - 1);
89 }
90}
91
92static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
93 const uint8_t *_src, const int16_t *filter,
94 const int32_t *filterPos, int filterSize)
95{
96 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
97 int i;
98 const uint16_t *src = (const uint16_t *) _src;
99 int sh = desc->comp[0].depth_minus1;
100
101 if(sh<15)
102 sh= isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : desc->comp[0].depth_minus1;
103
104 for (i = 0; i < dstW; i++) {
105 int j;
106 int srcPos = filterPos[i];
107 int val = 0;
108
109 for (j = 0; j < filterSize; j++) {
110 val += src[srcPos + j] * filter[filterSize * i + j];
111 }
112 // filter=14 bit, input=16 bit, output=30 bit, >> 15 makes 15 bit
113 dst[i] = FFMIN(val >> sh, (1 << 15) - 1);
114 }
115}
116
117// bilinear / bicubic scaling
118static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW,
119 const uint8_t *src, const int16_t *filter,
120 const int32_t *filterPos, int filterSize)
121{
122 int i;
123 for (i = 0; i < dstW; i++) {
124 int j;
125 int srcPos = filterPos[i];
126 int val = 0;
127 for (j = 0; j < filterSize; j++) {
128 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
129 }
130 dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ...
131 }
132}
133
134static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW,
135 const uint8_t *src, const int16_t *filter,
136 const int32_t *filterPos, int filterSize)
137{
138 int i;
139 int32_t *dst = (int32_t *) _dst;
140 for (i = 0; i < dstW; i++) {
141 int j;
142 int srcPos = filterPos[i];
143 int val = 0;
144 for (j = 0; j < filterSize; j++) {
145 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
146 }
147 dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ...
148 }
149}
150
151// FIXME all pal and rgb srcFormats could do this conversion as well
152// FIXME all scalers more complex than bilinear could do half of this transform
153static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
154{
155 int i;
156 for (i = 0; i < width; i++) {
157 dstU[i] = (FFMIN(dstU[i], 30775) * 4663 - 9289992) >> 12; // -264
158 dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264
159 }
160}
161
162static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
163{
164 int i;
165 for (i = 0; i < width; i++) {
166 dstU[i] = (dstU[i] * 1799 + 4081085) >> 11; // 1469
167 dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469
168 }
169}
170
171static void lumRangeToJpeg_c(int16_t *dst, int width)
172{
173 int i;
174 for (i = 0; i < width; i++)
175 dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14;
176}
177
178static void lumRangeFromJpeg_c(int16_t *dst, int width)
179{
180 int i;
181 for (i = 0; i < width; i++)
182 dst[i] = (dst[i] * 14071 + 33561947) >> 14;
183}
184
185static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
186{
187 int i;
188 int32_t *dstU = (int32_t *) _dstU;
189 int32_t *dstV = (int32_t *) _dstV;
190 for (i = 0; i < width; i++) {
191 dstU[i] = (FFMIN(dstU[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
192 dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
193 }
194}
195
196static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
197{
198 int i;
199 int32_t *dstU = (int32_t *) _dstU;
200 int32_t *dstV = (int32_t *) _dstV;
201 for (i = 0; i < width; i++) {
202 dstU[i] = (dstU[i] * 1799 + (4081085 << 4)) >> 11; // 1469
203 dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469
204 }
205}
206
207static void lumRangeToJpeg16_c(int16_t *_dst, int width)
208{
209 int i;
210 int32_t *dst = (int32_t *) _dst;
211 for (i = 0; i < width; i++) {
212 dst[i] = ((int)(FFMIN(dst[i], 30189 << 4) * 4769U - (39057361 << 2))) >> 12;
213 }
214}
215
216static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
217{
218 int i;
219 int32_t *dst = (int32_t *) _dst;
220 for (i = 0; i < width; i++)
221 dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12;
222}
223
224// *** horizontal scale Y line to temp buffer
225static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,
226 const uint8_t *src_in[4],
227 int srcW, int xInc,
228 const int16_t *hLumFilter,
229 const int32_t *hLumFilterPos,
230 int hLumFilterSize,
231 uint8_t *formatConvBuffer,
232 uint32_t *pal, int isAlpha)
233{
234 void (*toYV12)(uint8_t *, const uint8_t *, const uint8_t *, const uint8_t *, int, uint32_t *) =
235 isAlpha ? c->alpToYV12 : c->lumToYV12;
236 void (*convertRange)(int16_t *, int) = isAlpha ? NULL : c->lumConvertRange;
237 const uint8_t *src = src_in[isAlpha ? 3 : 0];
238
239 if (toYV12) {
240 toYV12(formatConvBuffer, src, src_in[1], src_in[2], srcW, pal);
241 src = formatConvBuffer;
242 } else if (c->readLumPlanar && !isAlpha) {
243 c->readLumPlanar(formatConvBuffer, src_in, srcW, c->input_rgb2yuv_table);
244 src = formatConvBuffer;
245 } else if (c->readAlpPlanar && isAlpha) {
246 c->readAlpPlanar(formatConvBuffer, src_in, srcW, NULL);
247 src = formatConvBuffer;
248 }
249
250 if (!c->hyscale_fast) {
251 c->hyScale(c, dst, dstWidth, src, hLumFilter,
252 hLumFilterPos, hLumFilterSize);
253 } else { // fast bilinear upscale / crap downscale
254 c->hyscale_fast(c, dst, dstWidth, src, srcW, xInc);
255 }
256
257 if (convertRange)
258 convertRange(dst, dstWidth);
259}
260
261static av_always_inline void hcscale(SwsContext *c, int16_t *dst1,
262 int16_t *dst2, int dstWidth,
263 const uint8_t *src_in[4],
264 int srcW, int xInc,
265 const int16_t *hChrFilter,
266 const int32_t *hChrFilterPos,
267 int hChrFilterSize,
268 uint8_t *formatConvBuffer, uint32_t *pal)
269{
270 const uint8_t *src1 = src_in[1], *src2 = src_in[2];
271 if (c->chrToYV12) {
272 uint8_t *buf2 = formatConvBuffer +
273 FFALIGN(srcW*2+78, 16);
274 c->chrToYV12(formatConvBuffer, buf2, src_in[0], src1, src2, srcW, pal);
275 src1= formatConvBuffer;
276 src2= buf2;
277 } else if (c->readChrPlanar) {
278 uint8_t *buf2 = formatConvBuffer +
279 FFALIGN(srcW*2+78, 16);
280 c->readChrPlanar(formatConvBuffer, buf2, src_in, srcW, c->input_rgb2yuv_table);
281 src1 = formatConvBuffer;
282 src2 = buf2;
283 }
284
285 if (!c->hcscale_fast) {
286 c->hcScale(c, dst1, dstWidth, src1, hChrFilter, hChrFilterPos, hChrFilterSize);
287 c->hcScale(c, dst2, dstWidth, src2, hChrFilter, hChrFilterPos, hChrFilterSize);
288 } else { // fast bilinear upscale / crap downscale
289 c->hcscale_fast(c, dst1, dst2, dstWidth, src1, src2, srcW, xInc);
290 }
291
292 if (c->chrConvertRange)
293 c->chrConvertRange(dst1, dst2, dstWidth);
294}
295
296#define DEBUG_SWSCALE_BUFFERS 0
297#define DEBUG_BUFFERS(...) \
298 if (DEBUG_SWSCALE_BUFFERS) \
299 av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
300
301static int swscale(SwsContext *c, const uint8_t *src[],
302 int srcStride[], int srcSliceY,
303 int srcSliceH, uint8_t *dst[], int dstStride[])
304{
305 /* load a few things into local vars to make the code more readable?
306 * and faster */
307 const int srcW = c->srcW;
308 const int dstW = c->dstW;
309 const int dstH = c->dstH;
310 const int chrDstW = c->chrDstW;
311 const int chrSrcW = c->chrSrcW;
312 const int lumXInc = c->lumXInc;
313 const int chrXInc = c->chrXInc;
314 const enum AVPixelFormat dstFormat = c->dstFormat;
315 const int flags = c->flags;
316 int32_t *vLumFilterPos = c->vLumFilterPos;
317 int32_t *vChrFilterPos = c->vChrFilterPos;
318 int32_t *hLumFilterPos = c->hLumFilterPos;
319 int32_t *hChrFilterPos = c->hChrFilterPos;
320 int16_t *hLumFilter = c->hLumFilter;
321 int16_t *hChrFilter = c->hChrFilter;
322 int32_t *lumMmxFilter = c->lumMmxFilter;
323 int32_t *chrMmxFilter = c->chrMmxFilter;
324 const int vLumFilterSize = c->vLumFilterSize;
325 const int vChrFilterSize = c->vChrFilterSize;
326 const int hLumFilterSize = c->hLumFilterSize;
327 const int hChrFilterSize = c->hChrFilterSize;
328 int16_t **lumPixBuf = c->lumPixBuf;
329 int16_t **chrUPixBuf = c->chrUPixBuf;
330 int16_t **chrVPixBuf = c->chrVPixBuf;
331 int16_t **alpPixBuf = c->alpPixBuf;
332 const int vLumBufSize = c->vLumBufSize;
333 const int vChrBufSize = c->vChrBufSize;
334 uint8_t *formatConvBuffer = c->formatConvBuffer;
335 uint32_t *pal = c->pal_yuv;
336 yuv2planar1_fn yuv2plane1 = c->yuv2plane1;
337 yuv2planarX_fn yuv2planeX = c->yuv2planeX;
338 yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX;
339 yuv2packed1_fn yuv2packed1 = c->yuv2packed1;
340 yuv2packed2_fn yuv2packed2 = c->yuv2packed2;
341 yuv2packedX_fn yuv2packedX = c->yuv2packedX;
342 yuv2anyX_fn yuv2anyX = c->yuv2anyX;
343 const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;
344 const int chrSrcSliceH = FF_CEIL_RSHIFT(srcSliceH, c->chrSrcVSubSample);
345 int should_dither = is9_OR_10BPS(c->srcFormat) ||
346 is16BPS(c->srcFormat);
347 int lastDstY;
348
349 /* vars which will change and which we need to store back in the context */
350 int dstY = c->dstY;
351 int lumBufIndex = c->lumBufIndex;
352 int chrBufIndex = c->chrBufIndex;
353 int lastInLumBuf = c->lastInLumBuf;
354 int lastInChrBuf = c->lastInChrBuf;
355
356 if (!usePal(c->srcFormat)) {
357 pal = c->input_rgb2yuv_table;
358 }
359
360 if (isPacked(c->srcFormat)) {
361 src[0] =
362 src[1] =
363 src[2] =
364 src[3] = src[0];
365 srcStride[0] =
366 srcStride[1] =
367 srcStride[2] =
368 srcStride[3] = srcStride[0];
369 }
370 srcStride[1] <<= c->vChrDrop;
371 srcStride[2] <<= c->vChrDrop;
372
373 DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
374 src[0], srcStride[0], src[1], srcStride[1],
375 src[2], srcStride[2], src[3], srcStride[3],
376 dst[0], dstStride[0], dst[1], dstStride[1],
377 dst[2], dstStride[2], dst[3], dstStride[3]);
378 DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
379 srcSliceY, srcSliceH, dstY, dstH);
380 DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n",
381 vLumFilterSize, vLumBufSize, vChrFilterSize, vChrBufSize);
382
383 if (dstStride[0]&15 || dstStride[1]&15 ||
384 dstStride[2]&15 || dstStride[3]&15) {
385 static int warnedAlready = 0; // FIXME maybe move this into the context
386 if (flags & SWS_PRINT_INFO && !warnedAlready) {
387 av_log(c, AV_LOG_WARNING,
388 "Warning: dstStride is not aligned!\n"
389 " ->cannot do aligned memory accesses anymore\n");
390 warnedAlready = 1;
391 }
392 }
393
394 if ( (uintptr_t)dst[0]&15 || (uintptr_t)dst[1]&15 || (uintptr_t)dst[2]&15
395 || (uintptr_t)src[0]&15 || (uintptr_t)src[1]&15 || (uintptr_t)src[2]&15
396 || dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15
397 || srcStride[0]&15 || srcStride[1]&15 || srcStride[2]&15 || srcStride[3]&15
398 ) {
399 static int warnedAlready=0;
400 int cpu_flags = av_get_cpu_flags();
401 if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){
402 av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speedloss\n");
403 warnedAlready=1;
404 }
405 }
406
407 /* Note the user might start scaling the picture in the middle so this
408 * will not get executed. This is not really intended but works
409 * currently, so people might do it. */
410 if (srcSliceY == 0) {
411 lumBufIndex = -1;
412 chrBufIndex = -1;
413 dstY = 0;
414 lastInLumBuf = -1;
415 lastInChrBuf = -1;
416 }
417
418 if (!should_dither) {
419 c->chrDither8 = c->lumDither8 = sws_pb_64;
420 }
421 lastDstY = dstY;
422
423 for (; dstY < dstH; dstY++) {
424 const int chrDstY = dstY >> c->chrDstVSubSample;
425 uint8_t *dest[4] = {
426 dst[0] + dstStride[0] * dstY,
427 dst[1] + dstStride[1] * chrDstY,
428 dst[2] + dstStride[2] * chrDstY,
429 (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL,
430 };
431 int use_mmx_vfilter= c->use_mmx_vfilter;
432
433 // First line needed as input
434 const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);
435 const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);
436 // First line needed as input
437 const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);
438
439 // Last line needed as input
440 int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;
441 int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1;
442 int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1;
443 int enough_lines;
444
445 // handle holes (FAST_BILINEAR & weird filters)
446 if (firstLumSrcY > lastInLumBuf)
447 lastInLumBuf = firstLumSrcY - 1;
448 if (firstChrSrcY > lastInChrBuf)
449 lastInChrBuf = firstChrSrcY - 1;
450 av_assert0(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);
451 av_assert0(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
452
453 DEBUG_BUFFERS("dstY: %d\n", dstY);
454 DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
455 firstLumSrcY, lastLumSrcY, lastInLumBuf);
456 DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
457 firstChrSrcY, lastChrSrcY, lastInChrBuf);
458
459 // Do we have enough lines in this slice to output the dstY line
460 enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&
461 lastChrSrcY < FF_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample);
462
463 if (!enough_lines) {
464 lastLumSrcY = srcSliceY + srcSliceH - 1;
465 lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
466 DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
467 lastLumSrcY, lastChrSrcY);
468 }
469
470 // Do horizontal scaling
471 while (lastInLumBuf < lastLumSrcY) {
472 const uint8_t *src1[4] = {
473 src[0] + (lastInLumBuf + 1 - srcSliceY) * srcStride[0],
474 src[1] + (lastInLumBuf + 1 - srcSliceY) * srcStride[1],
475 src[2] + (lastInLumBuf + 1 - srcSliceY) * srcStride[2],
476 src[3] + (lastInLumBuf + 1 - srcSliceY) * srcStride[3],
477 };
478 lumBufIndex++;
479 av_assert0(lumBufIndex < 2 * vLumBufSize);
480 av_assert0(lastInLumBuf + 1 - srcSliceY < srcSliceH);
481 av_assert0(lastInLumBuf + 1 - srcSliceY >= 0);
482 hyscale(c, lumPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc,
483 hLumFilter, hLumFilterPos, hLumFilterSize,
484 formatConvBuffer, pal, 0);
485 if (CONFIG_SWSCALE_ALPHA && alpPixBuf)
486 hyscale(c, alpPixBuf[lumBufIndex], dstW, src1, srcW,
487 lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize,
488 formatConvBuffer, pal, 1);
489 lastInLumBuf++;
490 DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
491 lumBufIndex, lastInLumBuf);
492 }
493 while (lastInChrBuf < lastChrSrcY) {
494 const uint8_t *src1[4] = {
495 src[0] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[0],
496 src[1] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[1],
497 src[2] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[2],
498 src[3] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[3],
499 };
500 chrBufIndex++;
501 av_assert0(chrBufIndex < 2 * vChrBufSize);
502 av_assert0(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH));
503 av_assert0(lastInChrBuf + 1 - chrSrcSliceY >= 0);
504 // FIXME replace parameters through context struct (some at least)
505
506 if (c->needs_hcscale)
507 hcscale(c, chrUPixBuf[chrBufIndex], chrVPixBuf[chrBufIndex],
508 chrDstW, src1, chrSrcW, chrXInc,
509 hChrFilter, hChrFilterPos, hChrFilterSize,
510 formatConvBuffer, pal);
511 lastInChrBuf++;
512 DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",
513 chrBufIndex, lastInChrBuf);
514 }
515 // wrap buf index around to stay inside the ring buffer
516 if (lumBufIndex >= vLumBufSize)
517 lumBufIndex -= vLumBufSize;
518 if (chrBufIndex >= vChrBufSize)
519 chrBufIndex -= vChrBufSize;
520 if (!enough_lines)
521 break; // we can't output a dstY line so let's try with the next slice
522
523#if HAVE_MMX_INLINE
524 updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex,
525 lastInLumBuf, lastInChrBuf);
526#endif
527 if (should_dither) {
528 c->chrDither8 = ff_dither_8x8_128[chrDstY & 7];
529 c->lumDither8 = ff_dither_8x8_128[dstY & 7];
530 }
531 if (dstY >= dstH - 2) {
532 /* hmm looks like we can't use MMX here without overwriting
533 * this array's tail */
534 ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,
535 &yuv2packed1, &yuv2packed2, &yuv2packedX, &yuv2anyX);
536 use_mmx_vfilter= 0;
537 }
538
539 {
540 const int16_t **lumSrcPtr = (const int16_t **)(void*) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
541 const int16_t **chrUSrcPtr = (const int16_t **)(void*) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
542 const int16_t **chrVSrcPtr = (const int16_t **)(void*) chrVPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
543 const int16_t **alpSrcPtr = (CONFIG_SWSCALE_ALPHA && alpPixBuf) ?
544 (const int16_t **)(void*) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
545 int16_t *vLumFilter = c->vLumFilter;
546 int16_t *vChrFilter = c->vChrFilter;
547
548 if (isPlanarYUV(dstFormat) ||
549 (isGray(dstFormat) && !isALPHA(dstFormat))) { // YV12 like
550 const int chrSkipMask = (1 << c->chrDstVSubSample) - 1;
551
552 vLumFilter += dstY * vLumFilterSize;
553 vChrFilter += chrDstY * vChrFilterSize;
554
555// av_assert0(use_mmx_vfilter != (
556// yuv2planeX == yuv2planeX_10BE_c
557// || yuv2planeX == yuv2planeX_10LE_c
558// || yuv2planeX == yuv2planeX_9BE_c
559// || yuv2planeX == yuv2planeX_9LE_c
560// || yuv2planeX == yuv2planeX_16BE_c
561// || yuv2planeX == yuv2planeX_16LE_c
562// || yuv2planeX == yuv2planeX_8_c) || !ARCH_X86);
563
564 if(use_mmx_vfilter){
565 vLumFilter= (int16_t *)c->lumMmxFilter;
566 vChrFilter= (int16_t *)c->chrMmxFilter;
567 }
568
569 if (vLumFilterSize == 1) {
570 yuv2plane1(lumSrcPtr[0], dest[0], dstW, c->lumDither8, 0);
571 } else {
572 yuv2planeX(vLumFilter, vLumFilterSize,
573 lumSrcPtr, dest[0],
574 dstW, c->lumDither8, 0);
575 }
576
577 if (!((dstY & chrSkipMask) || isGray(dstFormat))) {
578 if (yuv2nv12cX) {
579 yuv2nv12cX(c, vChrFilter,
580 vChrFilterSize, chrUSrcPtr, chrVSrcPtr,
581 dest[1], chrDstW);
582 } else if (vChrFilterSize == 1) {
583 yuv2plane1(chrUSrcPtr[0], dest[1], chrDstW, c->chrDither8, 0);
584 yuv2plane1(chrVSrcPtr[0], dest[2], chrDstW, c->chrDither8, 3);
585 } else {
586 yuv2planeX(vChrFilter,
587 vChrFilterSize, chrUSrcPtr, dest[1],
588 chrDstW, c->chrDither8, 0);
589 yuv2planeX(vChrFilter,
590 vChrFilterSize, chrVSrcPtr, dest[2],
591 chrDstW, c->chrDither8, use_mmx_vfilter ? (c->uv_offx2 >> 1) : 3);
592 }
593 }
594
595 if (CONFIG_SWSCALE_ALPHA && alpPixBuf) {
596 if(use_mmx_vfilter){
597 vLumFilter= (int16_t *)c->alpMmxFilter;
598 }
599 if (vLumFilterSize == 1) {
600 yuv2plane1(alpSrcPtr[0], dest[3], dstW,
601 c->lumDither8, 0);
602 } else {
603 yuv2planeX(vLumFilter,
604 vLumFilterSize, alpSrcPtr, dest[3],
605 dstW, c->lumDither8, 0);
606 }
607 }
608 } else if (yuv2packedX) {
609 av_assert1(lumSrcPtr + vLumFilterSize - 1 < (const int16_t **)lumPixBuf + vLumBufSize * 2);
610 av_assert1(chrUSrcPtr + vChrFilterSize - 1 < (const int16_t **)chrUPixBuf + vChrBufSize * 2);
611 if (c->yuv2packed1 && vLumFilterSize == 1 &&
612 vChrFilterSize <= 2) { // unscaled RGB
613 int chrAlpha = vChrFilterSize == 1 ? 0 : vChrFilter[2 * dstY + 1];
614 yuv2packed1(c, *lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
615 alpPixBuf ? *alpSrcPtr : NULL,
616 dest[0], dstW, chrAlpha, dstY);
617 } else if (c->yuv2packed2 && vLumFilterSize == 2 &&
618 vChrFilterSize == 2) { // bilinear upscale RGB
619 int lumAlpha = vLumFilter[2 * dstY + 1];
620 int chrAlpha = vChrFilter[2 * dstY + 1];
621 lumMmxFilter[2] =
622 lumMmxFilter[3] = vLumFilter[2 * dstY] * 0x10001;
623 chrMmxFilter[2] =
624 chrMmxFilter[3] = vChrFilter[2 * chrDstY] * 0x10001;
625 yuv2packed2(c, lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
626 alpPixBuf ? alpSrcPtr : NULL,
627 dest[0], dstW, lumAlpha, chrAlpha, dstY);
628 } else { // general RGB
629 yuv2packedX(c, vLumFilter + dstY * vLumFilterSize,
630 lumSrcPtr, vLumFilterSize,
631 vChrFilter + dstY * vChrFilterSize,
632 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
633 alpSrcPtr, dest[0], dstW, dstY);
634 }
635 } else {
636 av_assert1(!yuv2packed1 && !yuv2packed2);
637 yuv2anyX(c, vLumFilter + dstY * vLumFilterSize,
638 lumSrcPtr, vLumFilterSize,
639 vChrFilter + dstY * vChrFilterSize,
640 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
641 alpSrcPtr, dest, dstW, dstY);
642 }
643 }
644 }
645 if (isPlanar(dstFormat) && isALPHA(dstFormat) && !alpPixBuf) {
646 int length = dstW;
647 int height = dstY - lastDstY;
648
649 if (is16BPS(dstFormat) || isNBPS(dstFormat)) {
650 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
651 fillPlane16(dst[3], dstStride[3], length, height, lastDstY,
652 1, desc->comp[3].depth_minus1,
653 isBE(dstFormat));
654 } else
655 fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255);
656 }
657
658#if HAVE_MMXEXT_INLINE
659 if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT)
660 __asm__ volatile ("sfence" ::: "memory");
661#endif
662 emms_c();
663
664 /* store changed local vars back in the context */
665 c->dstY = dstY;
666 c->lumBufIndex = lumBufIndex;
667 c->chrBufIndex = chrBufIndex;
668 c->lastInLumBuf = lastInLumBuf;
669 c->lastInChrBuf = lastInChrBuf;
670
671 return dstY - lastDstY;
672}
673
674av_cold void ff_sws_init_range_convert(SwsContext *c)
675{
676 c->lumConvertRange = NULL;
677 c->chrConvertRange = NULL;
678 if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
679 if (c->dstBpc <= 14) {
680 if (c->srcRange) {
681 c->lumConvertRange = lumRangeFromJpeg_c;
682 c->chrConvertRange = chrRangeFromJpeg_c;
683 } else {
684 c->lumConvertRange = lumRangeToJpeg_c;
685 c->chrConvertRange = chrRangeToJpeg_c;
686 }
687 } else {
688 if (c->srcRange) {
689 c->lumConvertRange = lumRangeFromJpeg16_c;
690 c->chrConvertRange = chrRangeFromJpeg16_c;
691 } else {
692 c->lumConvertRange = lumRangeToJpeg16_c;
693 c->chrConvertRange = chrRangeToJpeg16_c;
694 }
695 }
696 }
697}
698
699static av_cold void sws_init_swscale(SwsContext *c)
700{
701 enum AVPixelFormat srcFormat = c->srcFormat;
702
703 ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX,
704 &c->yuv2nv12cX, &c->yuv2packed1,
705 &c->yuv2packed2, &c->yuv2packedX, &c->yuv2anyX);
706
707 ff_sws_init_input_funcs(c);
708
709
710 if (c->srcBpc == 8) {
711 if (c->dstBpc <= 14) {
712 c->hyScale = c->hcScale = hScale8To15_c;
713 if (c->flags & SWS_FAST_BILINEAR) {
714 c->hyscale_fast = ff_hyscale_fast_c;
715 c->hcscale_fast = ff_hcscale_fast_c;
716 }
717 } else {
718 c->hyScale = c->hcScale = hScale8To19_c;
719 }
720 } else {
721 c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c
722 : hScale16To15_c;
723 }
724
725 ff_sws_init_range_convert(c);
726
727 if (!(isGray(srcFormat) || isGray(c->dstFormat) ||
728 srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE))
729 c->needs_hcscale = 1;
730}
731
732SwsFunc ff_getSwsFunc(SwsContext *c)
733{
734 sws_init_swscale(c);
735
736 if (ARCH_PPC)
737 ff_sws_init_swscale_ppc(c);
738 if (ARCH_X86)
739 ff_sws_init_swscale_x86(c);
740
741 return swscale;
742}
743
744static void reset_ptr(const uint8_t *src[], int format)
745{
746 if (!isALPHA(format))
747 src[3] = NULL;
748 if (!isPlanar(format)) {
749 src[3] = src[2] = NULL;
750
751 if (!usePal(format))
752 src[1] = NULL;
753 }
754}
755
756static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt,
757 const int linesizes[4])
758{
759 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
760 int i;
761
762 for (i = 0; i < 4; i++) {
763 int plane = desc->comp[i].plane;
764 if (!data[plane] || !linesizes[plane])
765 return 0;
766 }
767
768 return 1;
769}
770
771static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst,
772 const uint16_t *src, int stride, int h)
773{
774 int xp,yp;
775 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
776
777 for (yp=0; yp<h; yp++) {
778 for (xp=0; xp+2<stride; xp+=3) {
779 int x, y, z, r, g, b;
780
781 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
782 x = AV_RB16(src + xp + 0);
783 y = AV_RB16(src + xp + 1);
784 z = AV_RB16(src + xp + 2);
785 } else {
786 x = AV_RL16(src + xp + 0);
787 y = AV_RL16(src + xp + 1);
788 z = AV_RL16(src + xp + 2);
789 }
790
791 x = c->xyzgamma[x>>4];
792 y = c->xyzgamma[y>>4];
793 z = c->xyzgamma[z>>4];
794
795 // convert from XYZlinear to sRGBlinear
796 r = c->xyz2rgb_matrix[0][0] * x +
797 c->xyz2rgb_matrix[0][1] * y +
798 c->xyz2rgb_matrix[0][2] * z >> 12;
799 g = c->xyz2rgb_matrix[1][0] * x +
800 c->xyz2rgb_matrix[1][1] * y +
801 c->xyz2rgb_matrix[1][2] * z >> 12;
802 b = c->xyz2rgb_matrix[2][0] * x +
803 c->xyz2rgb_matrix[2][1] * y +
804 c->xyz2rgb_matrix[2][2] * z >> 12;
805
806 // limit values to 12-bit depth
807 r = av_clip_c(r,0,4095);
808 g = av_clip_c(g,0,4095);
809 b = av_clip_c(b,0,4095);
810
811 // convert from sRGBlinear to RGB and scale from 12bit to 16bit
812 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
813 AV_WB16(dst + xp + 0, c->rgbgamma[r] << 4);
814 AV_WB16(dst + xp + 1, c->rgbgamma[g] << 4);
815 AV_WB16(dst + xp + 2, c->rgbgamma[b] << 4);
816 } else {
817 AV_WL16(dst + xp + 0, c->rgbgamma[r] << 4);
818 AV_WL16(dst + xp + 1, c->rgbgamma[g] << 4);
819 AV_WL16(dst + xp + 2, c->rgbgamma[b] << 4);
820 }
821 }
822 src += stride;
823 dst += stride;
824 }
825}
826
827static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst,
828 const uint16_t *src, int stride, int h)
829{
830 int xp,yp;
831 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->dstFormat);
832
833 for (yp=0; yp<h; yp++) {
834 for (xp=0; xp+2<stride; xp+=3) {
835 int x, y, z, r, g, b;
836
837 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
838 r = AV_RB16(src + xp + 0);
839 g = AV_RB16(src + xp + 1);
840 b = AV_RB16(src + xp + 2);
841 } else {
842 r = AV_RL16(src + xp + 0);
843 g = AV_RL16(src + xp + 1);
844 b = AV_RL16(src + xp + 2);
845 }
846
847 r = c->rgbgammainv[r>>4];
848 g = c->rgbgammainv[g>>4];
849 b = c->rgbgammainv[b>>4];
850
851 // convert from sRGBlinear to XYZlinear
852 x = c->rgb2xyz_matrix[0][0] * r +
853 c->rgb2xyz_matrix[0][1] * g +
854 c->rgb2xyz_matrix[0][2] * b >> 12;
855 y = c->rgb2xyz_matrix[1][0] * r +
856 c->rgb2xyz_matrix[1][1] * g +
857 c->rgb2xyz_matrix[1][2] * b >> 12;
858 z = c->rgb2xyz_matrix[2][0] * r +
859 c->rgb2xyz_matrix[2][1] * g +
860 c->rgb2xyz_matrix[2][2] * b >> 12;
861
862 // limit values to 12-bit depth
863 x = av_clip_c(x,0,4095);
864 y = av_clip_c(y,0,4095);
865 z = av_clip_c(z,0,4095);
866
867 // convert from XYZlinear to X'Y'Z' and scale from 12bit to 16bit
868 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
869 AV_WB16(dst + xp + 0, c->xyzgammainv[x] << 4);
870 AV_WB16(dst + xp + 1, c->xyzgammainv[y] << 4);
871 AV_WB16(dst + xp + 2, c->xyzgammainv[z] << 4);
872 } else {
873 AV_WL16(dst + xp + 0, c->xyzgammainv[x] << 4);
874 AV_WL16(dst + xp + 1, c->xyzgammainv[y] << 4);
875 AV_WL16(dst + xp + 2, c->xyzgammainv[z] << 4);
876 }
877 }
878 src += stride;
879 dst += stride;
880 }
881}
882
883/**
884 * swscale wrapper, so we don't need to export the SwsContext.
885 * Assumes planar YUV to be in YUV order instead of YVU.
886 */
887int attribute_align_arg sws_scale(struct SwsContext *c,
888 const uint8_t * const srcSlice[],
889 const int srcStride[], int srcSliceY,
890 int srcSliceH, uint8_t *const dst[],
891 const int dstStride[])
892{
893 int i, ret;
894 const uint8_t *src2[4];
895 uint8_t *dst2[4];
896 uint8_t *rgb0_tmp = NULL;
897
898 if (!srcStride || !dstStride || !dst || !srcSlice) {
899 av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
900 return 0;
901 }
902 memcpy(src2, srcSlice, sizeof(src2));
903 memcpy(dst2, dst, sizeof(dst2));
904
905 // do not mess up sliceDir if we have a "trailing" 0-size slice
906 if (srcSliceH == 0)
907 return 0;
908
909 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
910 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
911 return 0;
912 }
913 if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
914 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
915 return 0;
916 }
917
918 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
919 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
920 return 0;
921 }
922 if (c->sliceDir == 0) {
923 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
924 }
925
926 if (usePal(c->srcFormat)) {
927 for (i = 0; i < 256; i++) {
928 int r, g, b, y, u, v, a = 0xff;
929 if (c->srcFormat == AV_PIX_FMT_PAL8) {
930 uint32_t p = ((const uint32_t *)(srcSlice[1]))[i];
931 a = (p >> 24) & 0xFF;
932 r = (p >> 16) & 0xFF;
933 g = (p >> 8) & 0xFF;
934 b = p & 0xFF;
935 } else if (c->srcFormat == AV_PIX_FMT_RGB8) {
936 r = ( i >> 5 ) * 36;
937 g = ((i >> 2) & 7) * 36;
938 b = ( i & 3) * 85;
939 } else if (c->srcFormat == AV_PIX_FMT_BGR8) {
940 b = ( i >> 6 ) * 85;
941 g = ((i >> 3) & 7) * 36;
942 r = ( i & 7) * 36;
943 } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {
944 r = ( i >> 3 ) * 255;
945 g = ((i >> 1) & 3) * 85;
946 b = ( i & 1) * 255;
947 } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) {
948 r = g = b = i;
949 } else {
950 av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);
951 b = ( i >> 3 ) * 255;
952 g = ((i >> 1) & 3) * 85;
953 r = ( i & 1) * 255;
954 }
955#define RGB2YUV_SHIFT 15
956#define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
957#define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
958#define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
959#define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
960#define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
961#define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
962#define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
963#define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
964#define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
965
966 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
967 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
968 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
969 c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24);
970
971 switch (c->dstFormat) {
972 case AV_PIX_FMT_BGR32:
973#if !HAVE_BIGENDIAN
974 case AV_PIX_FMT_RGB24:
975#endif
976 c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24);
977 break;
978 case AV_PIX_FMT_BGR32_1:
979#if HAVE_BIGENDIAN
980 case AV_PIX_FMT_BGR24:
981#endif
982 c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24);
983 break;
984 case AV_PIX_FMT_RGB32_1:
985#if HAVE_BIGENDIAN
986 case AV_PIX_FMT_RGB24:
987#endif
988 c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24);
989 break;
990 case AV_PIX_FMT_RGB32:
991#if !HAVE_BIGENDIAN
992 case AV_PIX_FMT_BGR24:
993#endif
994 default:
995 c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24);
996 }
997 }
998 }
999
1000 if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
1001 uint8_t *base;
1002 int x,y;
1003 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
1004 if (!rgb0_tmp)
1005 return AVERROR(ENOMEM);
1006
1007 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
1008 for (y=0; y<srcSliceH; y++){
1009 memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
1010 for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
1011 base[ srcStride[0]*y + x] = 0xFF;
1012 }
1013 }
1014 src2[0] = base;
1015 }
1016
1017 if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
1018 uint8_t *base;
1019 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
1020 if (!rgb0_tmp)
1021 return AVERROR(ENOMEM);
1022
1023 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
1024
1025 xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH);
1026 src2[0] = base;
1027 }
1028
1029 if (!srcSliceY && (c->flags & SWS_BITEXACT) && c->dither == SWS_DITHER_ED && c->dither_error[0])
1030 for (i = 0; i < 4; i++)
1031 memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2));
1032
1033
1034 // copy strides, so they can safely be modified
1035 if (c->sliceDir == 1) {
1036 // slices go from top to bottom
1037 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
1038 srcStride[3] };
1039 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
1040 dstStride[3] };
1041
1042 reset_ptr(src2, c->srcFormat);
1043 reset_ptr((void*)dst2, c->dstFormat);
1044
1045 /* reset slice direction at end of frame */
1046 if (srcSliceY + srcSliceH == c->srcH)
1047 c->sliceDir = 0;
1048
1049 ret = c->swscale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
1050 dstStride2);
1051 } else {
1052 // slices go from bottom to top => we flip the image internally
1053 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
1054 -srcStride[3] };
1055 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
1056 -dstStride[3] };
1057
1058 src2[0] += (srcSliceH - 1) * srcStride[0];
1059 if (!usePal(c->srcFormat))
1060 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
1061 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
1062 src2[3] += (srcSliceH - 1) * srcStride[3];
1063 dst2[0] += ( c->dstH - 1) * dstStride[0];
1064 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
1065 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
1066 dst2[3] += ( c->dstH - 1) * dstStride[3];
1067
1068 reset_ptr(src2, c->srcFormat);
1069 reset_ptr((void*)dst2, c->dstFormat);
1070
1071 /* reset slice direction at end of frame */
1072 if (!srcSliceY)
1073 c->sliceDir = 0;
1074
1075 ret = c->swscale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
1076 srcSliceH, dst2, dstStride2);
1077 }
1078
1079
1080 if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
1081 /* replace on the same data */
1082 rgb48Toxyz12(c, (uint16_t*)dst2[0], (const uint16_t*)dst2[0], dstStride[0]/2, ret);
1083 }
1084
1085 av_free(rgb0_tmp);
1086 return ret;
1087}
1088
ffmpeg Piment Noir Debian package repository