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Imported Debian version 2.5.0~trusty1.1
[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"
f6fa7814 30#include "libavutil/imgutils.h"
2ba45a60
DM		 31#include "libavutil/intreadwrite.h"
32#include "libavutil/mathematics.h"
33#include "libavutil/pixdesc.h"
34#include "config.h"
35#include "rgb2rgb.h"
36#include "swscale_internal.h"
37#include "swscale.h"
38
39DECLARE_ALIGNED(8, const uint8_t, ff_dither_8x8_128)[9][8] = {
40 { 36, 68, 60, 92, 34, 66, 58, 90, },
41 { 100, 4, 124, 28, 98, 2, 122, 26, },
42 { 52, 84, 44, 76, 50, 82, 42, 74, },
43 { 116, 20, 108, 12, 114, 18, 106, 10, },
44 { 32, 64, 56, 88, 38, 70, 62, 94, },
45 { 96, 0, 120, 24, 102, 6, 126, 30, },
46 { 48, 80, 40, 72, 54, 86, 46, 78, },
47 { 112, 16, 104, 8, 118, 22, 110, 14, },
48 { 36, 68, 60, 92, 34, 66, 58, 90, },
49};
50
51DECLARE_ALIGNED(8, static const uint8_t, sws_pb_64)[8] = {
52 64, 64, 64, 64, 64, 64, 64, 64
53};
54
55static av_always_inline void fillPlane(uint8_t *plane, int stride, int width,
56 int height, int y, uint8_t val)
57{
58 int i;
59 uint8_t *ptr = plane + stride * y;
60 for (i = 0; i < height; i++) {
61 memset(ptr, val, width);
62 ptr += stride;
63 }
64}
65
66static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
67 const uint8_t *_src, const int16_t *filter,
68 const int32_t *filterPos, int filterSize)
69{
70 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
71 int i;
72 int32_t *dst = (int32_t *) _dst;
73 const uint16_t *src = (const uint16_t *) _src;
74 int bits = desc->comp[0].depth_minus1;
75 int sh = bits - 4;
76
77 if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth_minus1<15)
78 sh= 9;
79
80 for (i = 0; i < dstW; i++) {
81 int j;
82 int srcPos = filterPos[i];
83 int val = 0;
84
85 for (j = 0; j < filterSize; j++) {
86 val += src[srcPos + j] * filter[filterSize * i + j];
87 }
88 // filter=14 bit, input=16 bit, output=30 bit, >> 11 makes 19 bit
89 dst[i] = FFMIN(val >> sh, (1 << 19) - 1);
90 }
91}
92
93static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
94 const uint8_t *_src, const int16_t *filter,
95 const int32_t *filterPos, int filterSize)
96{
97 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
98 int i;
99 const uint16_t *src = (const uint16_t *) _src;
100 int sh = desc->comp[0].depth_minus1;
101
102 if(sh<15)
103 sh= isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : desc->comp[0].depth_minus1;
104
105 for (i = 0; i < dstW; i++) {
106 int j;
107 int srcPos = filterPos[i];
108 int val = 0;
109
110 for (j = 0; j < filterSize; j++) {
111 val += src[srcPos + j] * filter[filterSize * i + j];
112 }
113 // filter=14 bit, input=16 bit, output=30 bit, >> 15 makes 15 bit
114 dst[i] = FFMIN(val >> sh, (1 << 15) - 1);
115 }
116}
117
118// bilinear / bicubic scaling
119static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW,
120 const uint8_t *src, const int16_t *filter,
121 const int32_t *filterPos, int filterSize)
122{
123 int i;
124 for (i = 0; i < dstW; i++) {
125 int j;
126 int srcPos = filterPos[i];
127 int val = 0;
128 for (j = 0; j < filterSize; j++) {
129 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
130 }
131 dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ...
132 }
133}
134
135static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW,
136 const uint8_t *src, const int16_t *filter,
137 const int32_t *filterPos, int filterSize)
138{
139 int i;
140 int32_t *dst = (int32_t *) _dst;
141 for (i = 0; i < dstW; i++) {
142 int j;
143 int srcPos = filterPos[i];
144 int val = 0;
145 for (j = 0; j < filterSize; j++) {
146 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
147 }
148 dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ...
149 }
150}
151
152// FIXME all pal and rgb srcFormats could do this conversion as well
153// FIXME all scalers more complex than bilinear could do half of this transform
154static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
155{
156 int i;
157 for (i = 0; i < width; i++) {
158 dstU[i] = (FFMIN(dstU[i], 30775) * 4663 - 9289992) >> 12; // -264
159 dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264
160 }
161}
162
163static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
164{
165 int i;
166 for (i = 0; i < width; i++) {
167 dstU[i] = (dstU[i] * 1799 + 4081085) >> 11; // 1469
168 dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469
169 }
170}
171
172static void lumRangeToJpeg_c(int16_t *dst, int width)
173{
174 int i;
175 for (i = 0; i < width; i++)
176 dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14;
177}
178
179static void lumRangeFromJpeg_c(int16_t *dst, int width)
180{
181 int i;
182 for (i = 0; i < width; i++)
183 dst[i] = (dst[i] * 14071 + 33561947) >> 14;
184}
185
186static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
187{
188 int i;
189 int32_t *dstU = (int32_t *) _dstU;
190 int32_t *dstV = (int32_t *) _dstV;
191 for (i = 0; i < width; i++) {
192 dstU[i] = (FFMIN(dstU[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
193 dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
194 }
195}
196
197static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
198{
199 int i;
200 int32_t *dstU = (int32_t *) _dstU;
201 int32_t *dstV = (int32_t *) _dstV;
202 for (i = 0; i < width; i++) {
203 dstU[i] = (dstU[i] * 1799 + (4081085 << 4)) >> 11; // 1469
204 dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469
205 }
206}
207
208static void lumRangeToJpeg16_c(int16_t *_dst, int width)
209{
210 int i;
211 int32_t *dst = (int32_t *) _dst;
212 for (i = 0; i < width; i++) {
213 dst[i] = ((int)(FFMIN(dst[i], 30189 << 4) * 4769U - (39057361 << 2))) >> 12;
214 }
215}
216
217static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
218{
219 int i;
220 int32_t *dst = (int32_t *) _dst;
221 for (i = 0; i < width; i++)
222 dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12;
223}
224
225// *** horizontal scale Y line to temp buffer
226static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,
227 const uint8_t *src_in[4],
228 int srcW, int xInc,
229 const int16_t *hLumFilter,
230 const int32_t *hLumFilterPos,
231 int hLumFilterSize,
232 uint8_t *formatConvBuffer,
233 uint32_t *pal, int isAlpha)
234{
235 void (*toYV12)(uint8_t *, const uint8_t *, const uint8_t *, const uint8_t *, int, uint32_t *) =
236 isAlpha ? c->alpToYV12 : c->lumToYV12;
237 void (*convertRange)(int16_t *, int) = isAlpha ? NULL : c->lumConvertRange;
238 const uint8_t *src = src_in[isAlpha ? 3 : 0];
239
240 if (toYV12) {
241 toYV12(formatConvBuffer, src, src_in[1], src_in[2], srcW, pal);
242 src = formatConvBuffer;
243 } else if (c->readLumPlanar && !isAlpha) {
244 c->readLumPlanar(formatConvBuffer, src_in, srcW, c->input_rgb2yuv_table);
245 src = formatConvBuffer;
246 } else if (c->readAlpPlanar && isAlpha) {
247 c->readAlpPlanar(formatConvBuffer, src_in, srcW, NULL);
248 src = formatConvBuffer;
249 }
250
251 if (!c->hyscale_fast) {
252 c->hyScale(c, dst, dstWidth, src, hLumFilter,
253 hLumFilterPos, hLumFilterSize);
254 } else { // fast bilinear upscale / crap downscale
255 c->hyscale_fast(c, dst, dstWidth, src, srcW, xInc);
256 }
257
258 if (convertRange)
259 convertRange(dst, dstWidth);
260}
261
262static av_always_inline void hcscale(SwsContext *c, int16_t *dst1,
263 int16_t *dst2, int dstWidth,
264 const uint8_t *src_in[4],
265 int srcW, int xInc,
266 const int16_t *hChrFilter,
267 const int32_t *hChrFilterPos,
268 int hChrFilterSize,
269 uint8_t *formatConvBuffer, uint32_t *pal)
270{
271 const uint8_t *src1 = src_in[1], *src2 = src_in[2];
272 if (c->chrToYV12) {
273 uint8_t *buf2 = formatConvBuffer +
274 FFALIGN(srcW*2+78, 16);
275 c->chrToYV12(formatConvBuffer, buf2, src_in[0], src1, src2, srcW, pal);
276 src1= formatConvBuffer;
277 src2= buf2;
278 } else if (c->readChrPlanar) {
279 uint8_t *buf2 = formatConvBuffer +
280 FFALIGN(srcW*2+78, 16);
281 c->readChrPlanar(formatConvBuffer, buf2, src_in, srcW, c->input_rgb2yuv_table);
282 src1 = formatConvBuffer;
283 src2 = buf2;
284 }
285
286 if (!c->hcscale_fast) {
287 c->hcScale(c, dst1, dstWidth, src1, hChrFilter, hChrFilterPos, hChrFilterSize);
288 c->hcScale(c, dst2, dstWidth, src2, hChrFilter, hChrFilterPos, hChrFilterSize);
289 } else { // fast bilinear upscale / crap downscale
290 c->hcscale_fast(c, dst1, dst2, dstWidth, src1, src2, srcW, xInc);
291 }
292
293 if (c->chrConvertRange)
294 c->chrConvertRange(dst1, dst2, dstWidth);
295}
296
297#define DEBUG_SWSCALE_BUFFERS 0
298#define DEBUG_BUFFERS(...) \
299 if (DEBUG_SWSCALE_BUFFERS) \
300 av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
301
302static int swscale(SwsContext *c, const uint8_t *src[],
303 int srcStride[], int srcSliceY,
304 int srcSliceH, uint8_t *dst[], int dstStride[])
305{
306 /* load a few things into local vars to make the code more readable?
307 * and faster */
308 const int srcW = c->srcW;
309 const int dstW = c->dstW;
310 const int dstH = c->dstH;
311 const int chrDstW = c->chrDstW;
312 const int chrSrcW = c->chrSrcW;
313 const int lumXInc = c->lumXInc;
314 const int chrXInc = c->chrXInc;
315 const enum AVPixelFormat dstFormat = c->dstFormat;
316 const int flags = c->flags;
317 int32_t *vLumFilterPos = c->vLumFilterPos;
318 int32_t *vChrFilterPos = c->vChrFilterPos;
319 int32_t *hLumFilterPos = c->hLumFilterPos;
320 int32_t *hChrFilterPos = c->hChrFilterPos;
321 int16_t *hLumFilter = c->hLumFilter;
322 int16_t *hChrFilter = c->hChrFilter;
323 int32_t *lumMmxFilter = c->lumMmxFilter;
324 int32_t *chrMmxFilter = c->chrMmxFilter;
325 const int vLumFilterSize = c->vLumFilterSize;
326 const int vChrFilterSize = c->vChrFilterSize;
327 const int hLumFilterSize = c->hLumFilterSize;
328 const int hChrFilterSize = c->hChrFilterSize;
329 int16_t **lumPixBuf = c->lumPixBuf;
330 int16_t **chrUPixBuf = c->chrUPixBuf;
331 int16_t **chrVPixBuf = c->chrVPixBuf;
332 int16_t **alpPixBuf = c->alpPixBuf;
333 const int vLumBufSize = c->vLumBufSize;
334 const int vChrBufSize = c->vChrBufSize;
335 uint8_t *formatConvBuffer = c->formatConvBuffer;
336 uint32_t *pal = c->pal_yuv;
337 yuv2planar1_fn yuv2plane1 = c->yuv2plane1;
338 yuv2planarX_fn yuv2planeX = c->yuv2planeX;
339 yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX;
340 yuv2packed1_fn yuv2packed1 = c->yuv2packed1;
341 yuv2packed2_fn yuv2packed2 = c->yuv2packed2;
342 yuv2packedX_fn yuv2packedX = c->yuv2packedX;
343 yuv2anyX_fn yuv2anyX = c->yuv2anyX;
344 const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;
345 const int chrSrcSliceH = FF_CEIL_RSHIFT(srcSliceH, c->chrSrcVSubSample);
346 int should_dither = is9_OR_10BPS(c->srcFormat) ||
347 is16BPS(c->srcFormat);
348 int lastDstY;
349
350 /* vars which will change and which we need to store back in the context */
351 int dstY = c->dstY;
352 int lumBufIndex = c->lumBufIndex;
353 int chrBufIndex = c->chrBufIndex;
354 int lastInLumBuf = c->lastInLumBuf;
355 int lastInChrBuf = c->lastInChrBuf;
356
357 if (!usePal(c->srcFormat)) {
358 pal = c->input_rgb2yuv_table;
359 }
360
361 if (isPacked(c->srcFormat)) {
362 src[0] =
363 src[1] =
364 src[2] =
365 src[3] = src[0];
366 srcStride[0] =
367 srcStride[1] =
368 srcStride[2] =
369 srcStride[3] = srcStride[0];
370 }
371 srcStride[1] <<= c->vChrDrop;
372 srcStride[2] <<= c->vChrDrop;
373
374 DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
375 src[0], srcStride[0], src[1], srcStride[1],
376 src[2], srcStride[2], src[3], srcStride[3],
377 dst[0], dstStride[0], dst[1], dstStride[1],
378 dst[2], dstStride[2], dst[3], dstStride[3]);
379 DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
380 srcSliceY, srcSliceH, dstY, dstH);
381 DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n",
382 vLumFilterSize, vLumBufSize, vChrFilterSize, vChrBufSize);
383
384 if (dstStride[0]&15 || dstStride[1]&15 ||
385 dstStride[2]&15 || dstStride[3]&15) {
386 static int warnedAlready = 0; // FIXME maybe move this into the context
387 if (flags & SWS_PRINT_INFO && !warnedAlready) {
388 av_log(c, AV_LOG_WARNING,
389 "Warning: dstStride is not aligned!\n"
390 " ->cannot do aligned memory accesses anymore\n");
391 warnedAlready = 1;
392 }
393 }
394
395 if ( (uintptr_t)dst[0]&15 || (uintptr_t)dst[1]&15 || (uintptr_t)dst[2]&15
396 || (uintptr_t)src[0]&15 || (uintptr_t)src[1]&15 || (uintptr_t)src[2]&15
397 || dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15
398 || srcStride[0]&15 || srcStride[1]&15 || srcStride[2]&15 || srcStride[3]&15
399 ) {
400 static int warnedAlready=0;
401 int cpu_flags = av_get_cpu_flags();
402 if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){
403 av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speedloss\n");
404 warnedAlready=1;
405 }
406 }
407
408 /* Note the user might start scaling the picture in the middle so this
409 * will not get executed. This is not really intended but works
410 * currently, so people might do it. */
411 if (srcSliceY == 0) {
412 lumBufIndex = -1;
413 chrBufIndex = -1;
414 dstY = 0;
415 lastInLumBuf = -1;
416 lastInChrBuf = -1;
417 }
418
419 if (!should_dither) {
420 c->chrDither8 = c->lumDither8 = sws_pb_64;
421 }
422 lastDstY = dstY;
423
424 for (; dstY < dstH; dstY++) {
425 const int chrDstY = dstY >> c->chrDstVSubSample;
426 uint8_t *dest[4] = {
427 dst[0] + dstStride[0] * dstY,
428 dst[1] + dstStride[1] * chrDstY,
429 dst[2] + dstStride[2] * chrDstY,
430 (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL,
431 };
432 int use_mmx_vfilter= c->use_mmx_vfilter;
433
434 // First line needed as input
435 const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);
436 const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);
437 // First line needed as input
438 const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);
439
440 // Last line needed as input
441 int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;
442 int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1;
443 int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1;
444 int enough_lines;
445
446 // handle holes (FAST_BILINEAR & weird filters)
447 if (firstLumSrcY > lastInLumBuf)
448 lastInLumBuf = firstLumSrcY - 1;
449 if (firstChrSrcY > lastInChrBuf)
450 lastInChrBuf = firstChrSrcY - 1;
451 av_assert0(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);
452 av_assert0(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
453
454 DEBUG_BUFFERS("dstY: %d\n", dstY);
455 DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
456 firstLumSrcY, lastLumSrcY, lastInLumBuf);
457 DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
458 firstChrSrcY, lastChrSrcY, lastInChrBuf);
459
460 // Do we have enough lines in this slice to output the dstY line
461 enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&
462 lastChrSrcY < FF_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample);
463
464 if (!enough_lines) {
465 lastLumSrcY = srcSliceY + srcSliceH - 1;
466 lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
467 DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
468 lastLumSrcY, lastChrSrcY);
469 }
470
471 // Do horizontal scaling
472 while (lastInLumBuf < lastLumSrcY) {
473 const uint8_t *src1[4] = {
474 src[0] + (lastInLumBuf + 1 - srcSliceY) * srcStride[0],
475 src[1] + (lastInLumBuf + 1 - srcSliceY) * srcStride[1],
476 src[2] + (lastInLumBuf + 1 - srcSliceY) * srcStride[2],
477 src[3] + (lastInLumBuf + 1 - srcSliceY) * srcStride[3],
478 };
479 lumBufIndex++;
480 av_assert0(lumBufIndex < 2 * vLumBufSize);
481 av_assert0(lastInLumBuf + 1 - srcSliceY < srcSliceH);
482 av_assert0(lastInLumBuf + 1 - srcSliceY >= 0);
483 hyscale(c, lumPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc,
484 hLumFilter, hLumFilterPos, hLumFilterSize,
485 formatConvBuffer, pal, 0);
486 if (CONFIG_SWSCALE_ALPHA && alpPixBuf)
487 hyscale(c, alpPixBuf[lumBufIndex], dstW, src1, srcW,
488 lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize,
489 formatConvBuffer, pal, 1);
490 lastInLumBuf++;
491 DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
492 lumBufIndex, lastInLumBuf);
493 }
494 while (lastInChrBuf < lastChrSrcY) {
495 const uint8_t *src1[4] = {
496 src[0] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[0],
497 src[1] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[1],
498 src[2] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[2],
499 src[3] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[3],
500 };
501 chrBufIndex++;
502 av_assert0(chrBufIndex < 2 * vChrBufSize);
503 av_assert0(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH));
504 av_assert0(lastInChrBuf + 1 - chrSrcSliceY >= 0);
505 // FIXME replace parameters through context struct (some at least)
506
507 if (c->needs_hcscale)
508 hcscale(c, chrUPixBuf[chrBufIndex], chrVPixBuf[chrBufIndex],
509 chrDstW, src1, chrSrcW, chrXInc,
510 hChrFilter, hChrFilterPos, hChrFilterSize,
511 formatConvBuffer, pal);
512 lastInChrBuf++;
513 DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",
514 chrBufIndex, lastInChrBuf);
515 }
516 // wrap buf index around to stay inside the ring buffer
517 if (lumBufIndex >= vLumBufSize)
518 lumBufIndex -= vLumBufSize;
519 if (chrBufIndex >= vChrBufSize)
520 chrBufIndex -= vChrBufSize;
521 if (!enough_lines)
522 break; // we can't output a dstY line so let's try with the next slice
523
524#if HAVE_MMX_INLINE
525 updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex,
526 lastInLumBuf, lastInChrBuf);
527#endif
528 if (should_dither) {
529 c->chrDither8 = ff_dither_8x8_128[chrDstY & 7];
530 c->lumDither8 = ff_dither_8x8_128[dstY & 7];
531 }
532 if (dstY >= dstH - 2) {
533 /* hmm looks like we can't use MMX here without overwriting
534 * this array's tail */
535 ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,
536 &yuv2packed1, &yuv2packed2, &yuv2packedX, &yuv2anyX);
537 use_mmx_vfilter= 0;
538 }
539
540 {
541 const int16_t **lumSrcPtr = (const int16_t **)(void*) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
542 const int16_t **chrUSrcPtr = (const int16_t **)(void*) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
543 const int16_t **chrVSrcPtr = (const int16_t **)(void*) chrVPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
544 const int16_t **alpSrcPtr = (CONFIG_SWSCALE_ALPHA && alpPixBuf) ?
545 (const int16_t **)(void*) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
546 int16_t *vLumFilter = c->vLumFilter;
547 int16_t *vChrFilter = c->vChrFilter;
548
549 if (isPlanarYUV(dstFormat) ||
550 (isGray(dstFormat) && !isALPHA(dstFormat))) { // YV12 like
551 const int chrSkipMask = (1 << c->chrDstVSubSample) - 1;
552
553 vLumFilter += dstY * vLumFilterSize;
554 vChrFilter += chrDstY * vChrFilterSize;
555
556// av_assert0(use_mmx_vfilter != (
557// yuv2planeX == yuv2planeX_10BE_c
558// || yuv2planeX == yuv2planeX_10LE_c
559// || yuv2planeX == yuv2planeX_9BE_c
560// || yuv2planeX == yuv2planeX_9LE_c
561// || yuv2planeX == yuv2planeX_16BE_c
562// || yuv2planeX == yuv2planeX_16LE_c
563// || yuv2planeX == yuv2planeX_8_c) || !ARCH_X86);
564
565 if(use_mmx_vfilter){
566 vLumFilter= (int16_t *)c->lumMmxFilter;
567 vChrFilter= (int16_t *)c->chrMmxFilter;
568 }
569
570 if (vLumFilterSize == 1) {
571 yuv2plane1(lumSrcPtr[0], dest[0], dstW, c->lumDither8, 0);
572 } else {
573 yuv2planeX(vLumFilter, vLumFilterSize,
574 lumSrcPtr, dest[0],
575 dstW, c->lumDither8, 0);
576 }
577
578 if (!((dstY & chrSkipMask) || isGray(dstFormat))) {
579 if (yuv2nv12cX) {
580 yuv2nv12cX(c, vChrFilter,
581 vChrFilterSize, chrUSrcPtr, chrVSrcPtr,
582 dest[1], chrDstW);
583 } else if (vChrFilterSize == 1) {
584 yuv2plane1(chrUSrcPtr[0], dest[1], chrDstW, c->chrDither8, 0);
585 yuv2plane1(chrVSrcPtr[0], dest[2], chrDstW, c->chrDither8, 3);
586 } else {
587 yuv2planeX(vChrFilter,
588 vChrFilterSize, chrUSrcPtr, dest[1],
589 chrDstW, c->chrDither8, 0);
590 yuv2planeX(vChrFilter,
591 vChrFilterSize, chrVSrcPtr, dest[2],
592 chrDstW, c->chrDither8, use_mmx_vfilter ? (c->uv_offx2 >> 1) : 3);
593 }
594 }
595
596 if (CONFIG_SWSCALE_ALPHA && alpPixBuf) {
597 if(use_mmx_vfilter){
598 vLumFilter= (int16_t *)c->alpMmxFilter;
599 }
600 if (vLumFilterSize == 1) {
601 yuv2plane1(alpSrcPtr[0], dest[3], dstW,
602 c->lumDither8, 0);
603 } else {
604 yuv2planeX(vLumFilter,
605 vLumFilterSize, alpSrcPtr, dest[3],
606 dstW, c->lumDither8, 0);
607 }
608 }
609 } else if (yuv2packedX) {
610 av_assert1(lumSrcPtr + vLumFilterSize - 1 < (const int16_t **)lumPixBuf + vLumBufSize * 2);
611 av_assert1(chrUSrcPtr + vChrFilterSize - 1 < (const int16_t **)chrUPixBuf + vChrBufSize * 2);
612 if (c->yuv2packed1 && vLumFilterSize == 1 &&
613 vChrFilterSize <= 2) { // unscaled RGB
614 int chrAlpha = vChrFilterSize == 1 ? 0 : vChrFilter[2 * dstY + 1];
615 yuv2packed1(c, *lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
616 alpPixBuf ? *alpSrcPtr : NULL,
617 dest[0], dstW, chrAlpha, dstY);
618 } else if (c->yuv2packed2 && vLumFilterSize == 2 &&
619 vChrFilterSize == 2) { // bilinear upscale RGB
620 int lumAlpha = vLumFilter[2 * dstY + 1];
621 int chrAlpha = vChrFilter[2 * dstY + 1];
622 lumMmxFilter[2] =
623 lumMmxFilter[3] = vLumFilter[2 * dstY] * 0x10001;
624 chrMmxFilter[2] =
625 chrMmxFilter[3] = vChrFilter[2 * chrDstY] * 0x10001;
626 yuv2packed2(c, lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
627 alpPixBuf ? alpSrcPtr : NULL,
628 dest[0], dstW, lumAlpha, chrAlpha, dstY);
629 } else { // general RGB
630 yuv2packedX(c, vLumFilter + dstY * vLumFilterSize,
631 lumSrcPtr, vLumFilterSize,
632 vChrFilter + dstY * vChrFilterSize,
633 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
634 alpSrcPtr, dest[0], dstW, dstY);
635 }
636 } else {
637 av_assert1(!yuv2packed1 && !yuv2packed2);
638 yuv2anyX(c, vLumFilter + dstY * vLumFilterSize,
639 lumSrcPtr, vLumFilterSize,
640 vChrFilter + dstY * vChrFilterSize,
641 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
642 alpSrcPtr, dest, dstW, dstY);
643 }
644 }
645 }
646 if (isPlanar(dstFormat) && isALPHA(dstFormat) && !alpPixBuf) {
647 int length = dstW;
648 int height = dstY - lastDstY;
649
650 if (is16BPS(dstFormat) || isNBPS(dstFormat)) {
651 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
652 fillPlane16(dst[3], dstStride[3], length, height, lastDstY,
653 1, desc->comp[3].depth_minus1,
654 isBE(dstFormat));
655 } else
656 fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255);
657 }
658
659#if HAVE_MMXEXT_INLINE
660 if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT)
661 __asm__ volatile ("sfence" ::: "memory");
662#endif
663 emms_c();
664
665 /* store changed local vars back in the context */
666 c->dstY = dstY;
667 c->lumBufIndex = lumBufIndex;
668 c->chrBufIndex = chrBufIndex;
669 c->lastInLumBuf = lastInLumBuf;
670 c->lastInChrBuf = lastInChrBuf;
671
672 return dstY - lastDstY;
673}
674
675av_cold void ff_sws_init_range_convert(SwsContext *c)
676{
677 c->lumConvertRange = NULL;
678 c->chrConvertRange = NULL;
679 if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
680 if (c->dstBpc <= 14) {
681 if (c->srcRange) {
682 c->lumConvertRange = lumRangeFromJpeg_c;
683 c->chrConvertRange = chrRangeFromJpeg_c;
684 } else {
685 c->lumConvertRange = lumRangeToJpeg_c;
686 c->chrConvertRange = chrRangeToJpeg_c;
687 }
688 } else {
689 if (c->srcRange) {
690 c->lumConvertRange = lumRangeFromJpeg16_c;
691 c->chrConvertRange = chrRangeFromJpeg16_c;
692 } else {
693 c->lumConvertRange = lumRangeToJpeg16_c;
694 c->chrConvertRange = chrRangeToJpeg16_c;
695 }
696 }
697 }
698}
699
700static av_cold void sws_init_swscale(SwsContext *c)
701{
702 enum AVPixelFormat srcFormat = c->srcFormat;
703
704 ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX,
705 &c->yuv2nv12cX, &c->yuv2packed1,
706 &c->yuv2packed2, &c->yuv2packedX, &c->yuv2anyX);
707
708 ff_sws_init_input_funcs(c);
709
710
711 if (c->srcBpc == 8) {
712 if (c->dstBpc <= 14) {
713 c->hyScale = c->hcScale = hScale8To15_c;
714 if (c->flags & SWS_FAST_BILINEAR) {
715 c->hyscale_fast = ff_hyscale_fast_c;
716 c->hcscale_fast = ff_hcscale_fast_c;
717 }
718 } else {
719 c->hyScale = c->hcScale = hScale8To19_c;
720 }
721 } else {
722 c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c
723 : hScale16To15_c;
724 }
725
726 ff_sws_init_range_convert(c);
727
728 if (!(isGray(srcFormat) || isGray(c->dstFormat) ||
729 srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE))
730 c->needs_hcscale = 1;
731}
732
733SwsFunc ff_getSwsFunc(SwsContext *c)
734{
735 sws_init_swscale(c);
736
737 if (ARCH_PPC)
738 ff_sws_init_swscale_ppc(c);
739 if (ARCH_X86)
740 ff_sws_init_swscale_x86(c);
741
742 return swscale;
743}
744
745static void reset_ptr(const uint8_t *src[], int format)
746{
747 if (!isALPHA(format))
748 src[3] = NULL;
749 if (!isPlanar(format)) {
750 src[3] = src[2] = NULL;
751
752 if (!usePal(format))
753 src[1] = NULL;
754 }
755}
756
757static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt,
758 const int linesizes[4])
759{
760 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
761 int i;
762
763 for (i = 0; i < 4; i++) {
764 int plane = desc->comp[i].plane;
765 if (!data[plane] || !linesizes[plane])
766 return 0;
767 }
768
769 return 1;
770}
771
772static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst,
773 const uint16_t *src, int stride, int h)
774{
775 int xp,yp;
776 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
777
778 for (yp=0; yp<h; yp++) {
779 for (xp=0; xp+2<stride; xp+=3) {
780 int x, y, z, r, g, b;
781
782 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
783 x = AV_RB16(src + xp + 0);
784 y = AV_RB16(src + xp + 1);
785 z = AV_RB16(src + xp + 2);
786 } else {
787 x = AV_RL16(src + xp + 0);
788 y = AV_RL16(src + xp + 1);
789 z = AV_RL16(src + xp + 2);
790 }
791
792 x = c->xyzgamma[x>>4];
793 y = c->xyzgamma[y>>4];
794 z = c->xyzgamma[z>>4];
795
796 // convert from XYZlinear to sRGBlinear
797 r = c->xyz2rgb_matrix[0][0] * x +
798 c->xyz2rgb_matrix[0][1] * y +
799 c->xyz2rgb_matrix[0][2] * z >> 12;
800 g = c->xyz2rgb_matrix[1][0] * x +
801 c->xyz2rgb_matrix[1][1] * y +
802 c->xyz2rgb_matrix[1][2] * z >> 12;
803 b = c->xyz2rgb_matrix[2][0] * x +
804 c->xyz2rgb_matrix[2][1] * y +
805 c->xyz2rgb_matrix[2][2] * z >> 12;
806
807 // limit values to 12-bit depth
f6fa7814
DM		 808 r = av_clip(r, 0, 4095);
809 g = av_clip(g, 0, 4095);
810 b = av_clip(b, 0, 4095);
2ba45a60
DM		 811
812 // convert from sRGBlinear to RGB and scale from 12bit to 16bit
813 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
814 AV_WB16(dst + xp + 0, c->rgbgamma[r] << 4);
815 AV_WB16(dst + xp + 1, c->rgbgamma[g] << 4);
816 AV_WB16(dst + xp + 2, c->rgbgamma[b] << 4);
817 } else {
818 AV_WL16(dst + xp + 0, c->rgbgamma[r] << 4);
819 AV_WL16(dst + xp + 1, c->rgbgamma[g] << 4);
820 AV_WL16(dst + xp + 2, c->rgbgamma[b] << 4);
821 }
822 }
823 src += stride;
824 dst += stride;
825 }
826}
827
828static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst,
829 const uint16_t *src, int stride, int h)
830{
831 int xp,yp;
832 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->dstFormat);
833
834 for (yp=0; yp<h; yp++) {
835 for (xp=0; xp+2<stride; xp+=3) {
836 int x, y, z, r, g, b;
837
838 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
839 r = AV_RB16(src + xp + 0);
840 g = AV_RB16(src + xp + 1);
841 b = AV_RB16(src + xp + 2);
842 } else {
843 r = AV_RL16(src + xp + 0);
844 g = AV_RL16(src + xp + 1);
845 b = AV_RL16(src + xp + 2);
846 }
847
848 r = c->rgbgammainv[r>>4];
849 g = c->rgbgammainv[g>>4];
850 b = c->rgbgammainv[b>>4];
851
852 // convert from sRGBlinear to XYZlinear
853 x = c->rgb2xyz_matrix[0][0] * r +
854 c->rgb2xyz_matrix[0][1] * g +
855 c->rgb2xyz_matrix[0][2] * b >> 12;
856 y = c->rgb2xyz_matrix[1][0] * r +
857 c->rgb2xyz_matrix[1][1] * g +
858 c->rgb2xyz_matrix[1][2] * b >> 12;
859 z = c->rgb2xyz_matrix[2][0] * r +
860 c->rgb2xyz_matrix[2][1] * g +
861 c->rgb2xyz_matrix[2][2] * b >> 12;
862
863 // limit values to 12-bit depth
f6fa7814
DM		 864 x = av_clip(x, 0, 4095);
865 y = av_clip(y, 0, 4095);
866 z = av_clip(z, 0, 4095);
2ba45a60
DM		 867
868 // convert from XYZlinear to X'Y'Z' and scale from 12bit to 16bit
869 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
870 AV_WB16(dst + xp + 0, c->xyzgammainv[x] << 4);
871 AV_WB16(dst + xp + 1, c->xyzgammainv[y] << 4);
872 AV_WB16(dst + xp + 2, c->xyzgammainv[z] << 4);
873 } else {
874 AV_WL16(dst + xp + 0, c->xyzgammainv[x] << 4);
875 AV_WL16(dst + xp + 1, c->xyzgammainv[y] << 4);
876 AV_WL16(dst + xp + 2, c->xyzgammainv[z] << 4);
877 }
878 }
879 src += stride;
880 dst += stride;
881 }
882}
883
884/**
885 * swscale wrapper, so we don't need to export the SwsContext.
886 * Assumes planar YUV to be in YUV order instead of YVU.
887 */
888int attribute_align_arg sws_scale(struct SwsContext *c,
889 const uint8_t * const srcSlice[],
890 const int srcStride[], int srcSliceY,
891 int srcSliceH, uint8_t *const dst[],
892 const int dstStride[])
893{
894 int i, ret;
895 const uint8_t *src2[4];
896 uint8_t *dst2[4];
897 uint8_t *rgb0_tmp = NULL;
898
899 if (!srcStride || !dstStride || !dst || !srcSlice) {
900 av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
901 return 0;
902 }
f6fa7814
DM		 903 if (c->cascaded_context[0] && srcSliceY == 0 && srcSliceH == c->cascaded_context[0]->srcH) {
904 ret = sws_scale(c->cascaded_context[0],
905 srcSlice, srcStride, srcSliceY, srcSliceH,
906 c->cascaded_tmp, c->cascaded_tmpStride);
907 if (ret < 0)
908 return ret;
909 ret = sws_scale(c->cascaded_context[1],
910 (const uint8_t * const * )c->cascaded_tmp, c->cascaded_tmpStride, 0, c->cascaded_context[0]->dstH,
911 dst, dstStride);
912 return ret;
913 }
914
2ba45a60
DM		 915 memcpy(src2, srcSlice, sizeof(src2));
916 memcpy(dst2, dst, sizeof(dst2));
917
918 // do not mess up sliceDir if we have a "trailing" 0-size slice
919 if (srcSliceH == 0)
920 return 0;
921
922 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
923 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
924 return 0;
925 }
926 if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
927 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
928 return 0;
929 }
930
931 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
932 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
933 return 0;
934 }
935 if (c->sliceDir == 0) {
936 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
937 }
938
939 if (usePal(c->srcFormat)) {
940 for (i = 0; i < 256; i++) {
941 int r, g, b, y, u, v, a = 0xff;
942 if (c->srcFormat == AV_PIX_FMT_PAL8) {
943 uint32_t p = ((const uint32_t *)(srcSlice[1]))[i];
944 a = (p >> 24) & 0xFF;
945 r = (p >> 16) & 0xFF;
946 g = (p >> 8) & 0xFF;
947 b = p & 0xFF;
948 } else if (c->srcFormat == AV_PIX_FMT_RGB8) {
949 r = ( i >> 5 ) * 36;
950 g = ((i >> 2) & 7) * 36;
951 b = ( i & 3) * 85;
952 } else if (c->srcFormat == AV_PIX_FMT_BGR8) {
953 b = ( i >> 6 ) * 85;
954 g = ((i >> 3) & 7) * 36;
955 r = ( i & 7) * 36;
956 } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {
957 r = ( i >> 3 ) * 255;
958 g = ((i >> 1) & 3) * 85;
959 b = ( i & 1) * 255;
960 } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) {
961 r = g = b = i;
962 } else {
963 av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);
964 b = ( i >> 3 ) * 255;
965 g = ((i >> 1) & 3) * 85;
966 r = ( i & 1) * 255;
967 }
968#define RGB2YUV_SHIFT 15
969#define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
970#define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
971#define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
972#define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
973#define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
974#define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
975#define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
976#define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
977#define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
978
979 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
980 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
981 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
982 c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24);
983
984 switch (c->dstFormat) {
985 case AV_PIX_FMT_BGR32:
986#if !HAVE_BIGENDIAN
987 case AV_PIX_FMT_RGB24:
988#endif
989 c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24);
990 break;
991 case AV_PIX_FMT_BGR32_1:
992#if HAVE_BIGENDIAN
993 case AV_PIX_FMT_BGR24:
994#endif
995 c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24);
996 break;
997 case AV_PIX_FMT_RGB32_1:
998#if HAVE_BIGENDIAN
999 case AV_PIX_FMT_RGB24:
1000#endif
1001 c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24);
1002 break;
1003 case AV_PIX_FMT_RGB32:
1004#if !HAVE_BIGENDIAN
1005 case AV_PIX_FMT_BGR24:
1006#endif
1007 default:
1008 c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24);
1009 }
1010 }
1011 }
1012
1013 if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
1014 uint8_t *base;
1015 int x,y;
1016 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
1017 if (!rgb0_tmp)
1018 return AVERROR(ENOMEM);
1019
1020 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
1021 for (y=0; y<srcSliceH; y++){
1022 memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
1023 for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
1024 base[ srcStride[0]*y + x] = 0xFF;
1025 }
1026 }
1027 src2[0] = base;
1028 }
1029
1030 if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
1031 uint8_t *base;
1032 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
1033 if (!rgb0_tmp)
1034 return AVERROR(ENOMEM);
1035
1036 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
1037
1038 xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH);
1039 src2[0] = base;
1040 }
1041
1042 if (!srcSliceY && (c->flags & SWS_BITEXACT) && c->dither == SWS_DITHER_ED && c->dither_error[0])
1043 for (i = 0; i < 4; i++)
1044 memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2));
1045
1046
1047 // copy strides, so they can safely be modified
1048 if (c->sliceDir == 1) {
1049 // slices go from top to bottom
1050 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
1051 srcStride[3] };
1052 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
1053 dstStride[3] };
1054
1055 reset_ptr(src2, c->srcFormat);
1056 reset_ptr((void*)dst2, c->dstFormat);
1057
1058 /* reset slice direction at end of frame */
1059 if (srcSliceY + srcSliceH == c->srcH)
1060 c->sliceDir = 0;
1061
1062 ret = c->swscale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
1063 dstStride2);
1064 } else {
1065 // slices go from bottom to top => we flip the image internally
1066 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
1067 -srcStride[3] };
1068 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
1069 -dstStride[3] };
1070
1071 src2[0] += (srcSliceH - 1) * srcStride[0];
1072 if (!usePal(c->srcFormat))
1073 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
1074 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
1075 src2[3] += (srcSliceH - 1) * srcStride[3];
1076 dst2[0] += ( c->dstH - 1) * dstStride[0];
1077 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
1078 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
1079 dst2[3] += ( c->dstH - 1) * dstStride[3];
1080
1081 reset_ptr(src2, c->srcFormat);
1082 reset_ptr((void*)dst2, c->dstFormat);
1083
1084 /* reset slice direction at end of frame */
1085 if (!srcSliceY)
1086 c->sliceDir = 0;
1087
1088 ret = c->swscale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
1089 srcSliceH, dst2, dstStride2);
1090 }
1091
1092
1093 if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
1094 /* replace on the same data */
1095 rgb48Toxyz12(c, (uint16_t*)dst2[0], (const uint16_t*)dst2[0], dstStride[0]/2, ret);
1096 }
1097
1098 av_free(rgb0_tmp);
1099 return ret;
1100}
1101
ffmpeg Piment Noir Debian package repository