FFmpeg: libswscale/swscale.c Source File

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libswscale

swscale.c

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1 /*

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 */

21 #include <inttypes.h>

22 #include <math.h>

23 #include <stdio.h>

24 #include <string.h>

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"

38 DECLARE_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 };

50 DECLARE_ALIGNED(8, static const uint8_t, sws_pb_64)[8] = {

51 64, 64, 64, 64, 64, 64, 64, 64

52 };

54 static 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 }

65 static 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;

76 if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth_minus1<15)

77 sh= 9;

79 for (i = 0; i < dstW; i++) {

80 int j;

81 int srcPos = filterPos[i];

82 int val = 0;

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 }

92 static 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

118 static 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

134 static 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

153 static 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

162 static 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

171 static 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

178 static 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

185 static 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

196 static 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

207 static 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] = (FFMIN(dst[i], 30189 << 4) * 4769 - (39057361 << 2)) >> 12;

213 }

214

215 static void lumRangeFromJpeg16_c(int16_t *_dst, int width)

216 {

217 int i;

218 int32_t *dst = (int32_t *) _dst;

219 for (i = 0; i < width; i++)

220 dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12;

221 }

222

223 static void hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,

224 const uint8_t *src, int srcW, int xInc)

225 {

226 int i;

227 unsigned int xpos = 0;

228 for (i = 0; i < dstWidth; i++) {

229 register unsigned int xx = xpos >> 16;

230 register unsigned int xalpha = (xpos & 0xFFFF) >> 9;

231 dst[i] = (src[xx] << 7) + (src[xx + 1] - src[xx]) * xalpha;

232 xpos += xInc;

233 }

234 for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--)

235 dst[i] = src[srcW-1]*128;

236 }

237

238 // *** horizontal scale Y line to temp buffer

239 static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,

240 const uint8_t *src_in[4],

241 int srcW, int xInc,

242 const int16_t *hLumFilter,

243 const int32_t *hLumFilterPos,

244 int hLumFilterSize,

245 uint8_t *formatConvBuffer,

246 uint32_t *pal, int isAlpha)

247 {

248 void (*toYV12)(uint8_t *, const uint8_t *, const uint8_t *, const uint8_t *, int, uint32_t *) =

249 isAlpha ? c->alpToYV12 : c->lumToYV12;

250 void (*convertRange)(int16_t *, int) = isAlpha ? NULL : c->lumConvertRange;

251 const uint8_t *src = src_in[isAlpha ? 3 : 0];

252

253 if (toYV12) {

254 toYV12(formatConvBuffer, src, src_in[1], src_in[2], srcW, pal);

255 src = formatConvBuffer;

256 } else if (c->readLumPlanar && !isAlpha) {

257 c->readLumPlanar(formatConvBuffer, src_in, srcW, c->input_rgb2yuv_table);

258 src = formatConvBuffer;

259 } else if (c->readAlpPlanar && isAlpha) {

260 c->readAlpPlanar(formatConvBuffer, src_in, srcW, NULL);

261 src = formatConvBuffer;

262 }

263

264 if (!c->hyscale_fast) {

265 c->hyScale(c, dst, dstWidth, src, hLumFilter,

266 hLumFilterPos, hLumFilterSize);

267 } else { // fast bilinear upscale / crap downscale

268 c->hyscale_fast(c, dst, dstWidth, src, srcW, xInc);

269 }

270

271 if (convertRange)

272 convertRange(dst, dstWidth);

273 }

274

275 static void hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,

276 int dstWidth, const uint8_t *src1,

277 const uint8_t *src2, int srcW, int xInc)

278 {

279 int i;

280 unsigned int xpos = 0;

281 for (i = 0; i < dstWidth; i++) {

282 register unsigned int xx = xpos >> 16;

283 register unsigned int xalpha = (xpos & 0xFFFF) >> 9;

284 dst1[i] = (src1[xx] * (xalpha ^ 127) + src1[xx + 1] * xalpha);

285 dst2[i] = (src2[xx] * (xalpha ^ 127) + src2[xx + 1] * xalpha);

286 xpos += xInc;

287 }

288 for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) {

289 dst1[i] = src1[srcW-1]*128;

290 dst2[i] = src2[srcW-1]*128;

291 }

292 }

293

294 static av_always_inline void hcscale(SwsContext *c, int16_t *dst1,

295 int16_t *dst2, int dstWidth,

296 const uint8_t *src_in[4],

297 int srcW, int xInc,

298 const int16_t *hChrFilter,

299 const int32_t *hChrFilterPos,

300 int hChrFilterSize,

301 uint8_t *formatConvBuffer, uint32_t *pal)

302 {

303 const uint8_t *src1 = src_in[1], *src2 = src_in[2];

304 if (c->chrToYV12) {

305 uint8_t *buf2 = formatConvBuffer +

306 FFALIGN(srcW*2+78, 16);

307 c->chrToYV12(formatConvBuffer, buf2, src_in[0], src1, src2, srcW, pal);

308 src1= formatConvBuffer;

309 src2= buf2;

310 } else if (c->readChrPlanar) {

311 uint8_t *buf2 = formatConvBuffer +

312 FFALIGN(srcW*2+78, 16);

313 c->readChrPlanar(formatConvBuffer, buf2, src_in, srcW, c->input_rgb2yuv_table);

314 src1 = formatConvBuffer;

315 src2 = buf2;

316 }

317

318 if (!c->hcscale_fast) {

319 c->hcScale(c, dst1, dstWidth, src1, hChrFilter, hChrFilterPos, hChrFilterSize);

320 c->hcScale(c, dst2, dstWidth, src2, hChrFilter, hChrFilterPos, hChrFilterSize);

321 } else { // fast bilinear upscale / crap downscale

322 c->hcscale_fast(c, dst1, dst2, dstWidth, src1, src2, srcW, xInc);

323 }

324

325 if (c->chrConvertRange)

326 c->chrConvertRange(dst1, dst2, dstWidth);

327 }

328

329 #define DEBUG_SWSCALE_BUFFERS 0

330 #define DEBUG_BUFFERS(...) \

331 if (DEBUG_SWSCALE_BUFFERS) \

332 av_log(c, AV_LOG_DEBUG, __VA_ARGS__)

333

334 static int swscale(SwsContext *c, const uint8_t *src[],

335 int srcStride[], int srcSliceY,

336 int srcSliceH, uint8_t *dst[], int dstStride[])

337 {

338 /* load a few things into local vars to make the code more readable?

339 * and faster */

340 const int srcW = c->srcW;

341 const int dstW = c->dstW;

342 const int dstH = c->dstH;

343 const int chrDstW = c->chrDstW;

344 const int chrSrcW = c->chrSrcW;

345 const int lumXInc = c->lumXInc;

346 const int chrXInc = c->chrXInc;

347 const enum AVPixelFormat dstFormat = c->dstFormat;

348 const int flags = c->flags;

349 int32_t *vLumFilterPos = c->vLumFilterPos;

350 int32_t *vChrFilterPos = c->vChrFilterPos;

351 int32_t *hLumFilterPos = c->hLumFilterPos;

352 int32_t *hChrFilterPos = c->hChrFilterPos;

353 int16_t *hLumFilter = c->hLumFilter;

354 int16_t *hChrFilter = c->hChrFilter;

355 int32_t *lumMmxFilter = c->lumMmxFilter;

356 int32_t *chrMmxFilter = c->chrMmxFilter;

357 const int vLumFilterSize = c->vLumFilterSize;

358 const int vChrFilterSize = c->vChrFilterSize;

359 const int hLumFilterSize = c->hLumFilterSize;

360 const int hChrFilterSize = c->hChrFilterSize;

361 int16_t **lumPixBuf = c->lumPixBuf;

362 int16_t **chrUPixBuf = c->chrUPixBuf;

363 int16_t **chrVPixBuf = c->chrVPixBuf;

364 int16_t **alpPixBuf = c->alpPixBuf;

365 const int vLumBufSize = c->vLumBufSize;

366 const int vChrBufSize = c->vChrBufSize;

367 uint8_t *formatConvBuffer = c->formatConvBuffer;

368 uint32_t *pal = c->pal_yuv;

369 yuv2planar1_fn yuv2plane1 = c->yuv2plane1;

370 yuv2planarX_fn yuv2planeX = c->yuv2planeX;

371 yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX;

372 yuv2packed1_fn yuv2packed1 = c->yuv2packed1;

373 yuv2packed2_fn yuv2packed2 = c->yuv2packed2;

374 yuv2packedX_fn yuv2packedX = c->yuv2packedX;

375 yuv2anyX_fn yuv2anyX = c->yuv2anyX;

376 const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;

377 const int chrSrcSliceH = FF_CEIL_RSHIFT(srcSliceH, c->chrSrcVSubSample);

378 int should_dither = is9_OR_10BPS(c->srcFormat) ||

379 is16BPS(c->srcFormat);

380 int lastDstY;

381

382 /* vars which will change and which we need to store back in the context */

383 int dstY = c->dstY;

384 int lumBufIndex = c->lumBufIndex;

385 int chrBufIndex = c->chrBufIndex;

386 int lastInLumBuf = c->lastInLumBuf;

387 int lastInChrBuf = c->lastInChrBuf;

388

389 if (!usePal(c->srcFormat)) {

390 pal = c->input_rgb2yuv_table;

391 }

392

393 if (isPacked(c->srcFormat)) {

394 src[0] =

395 src[1] =

396 src[2] =

397 src[3] = src[0];

398 srcStride[0] =

399 srcStride[1] =

400 srcStride[2] =

401 srcStride[3] = srcStride[0];

402 }

403 srcStride[1] <<= c->vChrDrop;

404 srcStride[2] <<= c->vChrDrop;

405

406 DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",

407 src[0], srcStride[0], src[1], srcStride[1],

408 src[2], srcStride[2], src[3], srcStride[3],

409 dst[0], dstStride[0], dst[1], dstStride[1],

410 dst[2], dstStride[2], dst[3], dstStride[3]);

411 DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",

412 srcSliceY, srcSliceH, dstY, dstH);

413 DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n",

414 vLumFilterSize, vLumBufSize, vChrFilterSize, vChrBufSize);

415

416 if (dstStride[0]%16 !=0 || dstStride[1]%16 !=0 ||

417 dstStride[2]%16 !=0 || dstStride[3]%16 != 0) {

418 static int warnedAlready = 0; // FIXME maybe move this into the context

419 if (flags & SWS_PRINT_INFO && !warnedAlready) {

420 av_log(c, AV_LOG_WARNING,

421 "Warning: dstStride is not aligned!\n"

422 " ->cannot do aligned memory accesses anymore\n");

423 warnedAlready = 1;

424 }

425 }

426

427 if ( (uintptr_t)dst[0]%16 || (uintptr_t)dst[1]%16 || (uintptr_t)dst[2]%16

428 || (uintptr_t)src[0]%16 || (uintptr_t)src[1]%16 || (uintptr_t)src[2]%16

429 || dstStride[0]%16 || dstStride[1]%16 || dstStride[2]%16 || dstStride[3]%16

430 || srcStride[0]%16 || srcStride[1]%16 || srcStride[2]%16 || srcStride[3]%16

431 ) {

432 static int warnedAlready=0;

433 int cpu_flags = av_get_cpu_flags();

434 if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){

435 av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speedloss\n");

436 warnedAlready=1;

437 }

438 }

439

440 /* Note the user might start scaling the picture in the middle so this

441 * will not get executed. This is not really intended but works

442 * currently, so people might do it. */

443 if (srcSliceY == 0) {

444 lumBufIndex = -1;

445 chrBufIndex = -1;

446 dstY = 0;

447 lastInLumBuf = -1;

448 lastInChrBuf = -1;

449 }

450

451 if (!should_dither) {

452 c->chrDither8 = c->lumDither8 = sws_pb_64;

453 }

454 lastDstY = dstY;

455

456 for (; dstY < dstH; dstY++) {

457 const int chrDstY = dstY >> c->chrDstVSubSample;

458 uint8_t *dest[4] = {

459 dst[0] + dstStride[0] * dstY,

460 dst[1] + dstStride[1] * chrDstY,

461 dst[2] + dstStride[2] * chrDstY,

462 (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL,

463 };

464 int use_mmx_vfilter= c->use_mmx_vfilter;

465

466 // First line needed as input

467 const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);

468 const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);

469 // First line needed as input

470 const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);

471

472 // Last line needed as input

473 int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;

474 int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1;

475 int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1;

476 int enough_lines;

477

478 // handle holes (FAST_BILINEAR & weird filters)

479 if (firstLumSrcY > lastInLumBuf)

480 lastInLumBuf = firstLumSrcY - 1;

481 if (firstChrSrcY > lastInChrBuf)

482 lastInChrBuf = firstChrSrcY - 1;

483 av_assert0(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);

484 av_assert0(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);

485

486 DEBUG_BUFFERS("dstY: %d\n", dstY);

487 DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",

488 firstLumSrcY, lastLumSrcY, lastInLumBuf);

489 DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",

490 firstChrSrcY, lastChrSrcY, lastInChrBuf);

491

492 // Do we have enough lines in this slice to output the dstY line

493 enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&

494 lastChrSrcY < FF_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample);

495

496 if (!enough_lines) {

497 lastLumSrcY = srcSliceY + srcSliceH - 1;

498 lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;

499 DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",

500 lastLumSrcY, lastChrSrcY);

501 }

502

503 // Do horizontal scaling

504 while (lastInLumBuf < lastLumSrcY) {

505 const uint8_t *src1[4] = {

506 src[0] + (lastInLumBuf + 1 - srcSliceY) * srcStride[0],

507 src[1] + (lastInLumBuf + 1 - srcSliceY) * srcStride[1],

508 src[2] + (lastInLumBuf + 1 - srcSliceY) * srcStride[2],

509 src[3] + (lastInLumBuf + 1 - srcSliceY) * srcStride[3],

510 };

511 lumBufIndex++;

512 av_assert0(lumBufIndex < 2 * vLumBufSize);

513 av_assert0(lastInLumBuf + 1 - srcSliceY < srcSliceH);

514 av_assert0(lastInLumBuf + 1 - srcSliceY >= 0);

515 hyscale(c, lumPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc,

516 hLumFilter, hLumFilterPos, hLumFilterSize,

517 formatConvBuffer, pal, 0);

518 if (CONFIG_SWSCALE_ALPHA && alpPixBuf)

519 hyscale(c, alpPixBuf[lumBufIndex], dstW, src1, srcW,

520 lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize,

521 formatConvBuffer, pal, 1);

522 lastInLumBuf++;

523 DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",

524 lumBufIndex, lastInLumBuf);

525 }

526 while (lastInChrBuf < lastChrSrcY) {

527 const uint8_t *src1[4] = {

528 src[0] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[0],

529 src[1] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[1],

530 src[2] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[2],

531 src[3] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[3],

532 };

533 chrBufIndex++;

534 av_assert0(chrBufIndex < 2 * vChrBufSize);

535 av_assert0(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH));

536 av_assert0(lastInChrBuf + 1 - chrSrcSliceY >= 0);

537 // FIXME replace parameters through context struct (some at least)

538

539 if (c->needs_hcscale)

540 hcscale(c, chrUPixBuf[chrBufIndex], chrVPixBuf[chrBufIndex],

541 chrDstW, src1, chrSrcW, chrXInc,

542 hChrFilter, hChrFilterPos, hChrFilterSize,

543 formatConvBuffer, pal);

544 lastInChrBuf++;

545 DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",

546 chrBufIndex, lastInChrBuf);

547 }

548 // wrap buf index around to stay inside the ring buffer

549 if (lumBufIndex >= vLumBufSize)

550 lumBufIndex -= vLumBufSize;

551 if (chrBufIndex >= vChrBufSize)

552 chrBufIndex -= vChrBufSize;

553 if (!enough_lines)

554 break; // we can't output a dstY line so let's try with the next slice

555

556 #if HAVE_MMX_INLINE

557 updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex,

558 lastInLumBuf, lastInChrBuf);

559 #endif

560 if (should_dither) {

561 c->chrDither8 = ff_dither_8x8_128[chrDstY & 7];

562 c->lumDither8 = ff_dither_8x8_128[dstY & 7];

563 }

564 if (dstY >= dstH - 2) {

565 /* hmm looks like we can't use MMX here without overwriting

566 * this array's tail */

567 ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,

568 &yuv2packed1, &yuv2packed2, &yuv2packedX, &yuv2anyX);

569 use_mmx_vfilter= 0;

570 }

571

572 {

573 const int16_t **lumSrcPtr = (const int16_t **)(void*) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;

574 const int16_t **chrUSrcPtr = (const int16_t **)(void*) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;

575 const int16_t **chrVSrcPtr = (const int16_t **)(void*) chrVPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;

576 const int16_t **alpSrcPtr = (CONFIG_SWSCALE_ALPHA && alpPixBuf) ?

577 (const int16_t **)(void*) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;

578 int16_t *vLumFilter = c->vLumFilter;

579 int16_t *vChrFilter = c->vChrFilter;

580

581 if (isPlanarYUV(dstFormat) ||

582 (isGray(dstFormat) && !isALPHA(dstFormat))) { // YV12 like

583 const int chrSkipMask = (1 << c->chrDstVSubSample) - 1;

584

585 vLumFilter += dstY * vLumFilterSize;

586 vChrFilter += chrDstY * vChrFilterSize;

587

588 // av_assert0(use_mmx_vfilter != (

589 // yuv2planeX == yuv2planeX_10BE_c

590 // || yuv2planeX == yuv2planeX_10LE_c

591 // || yuv2planeX == yuv2planeX_9BE_c

592 // || yuv2planeX == yuv2planeX_9LE_c

593 // || yuv2planeX == yuv2planeX_16BE_c

594 // || yuv2planeX == yuv2planeX_16LE_c

595 // || yuv2planeX == yuv2planeX_8_c) || !ARCH_X86);

596

597 if(use_mmx_vfilter){

598 vLumFilter= (int16_t *)c->lumMmxFilter;

599 vChrFilter= (int16_t *)c->chrMmxFilter;

600 }

601

602 if (vLumFilterSize == 1) {

603 yuv2plane1(lumSrcPtr[0], dest[0], dstW, c->lumDither8, 0);

604 } else {

605 yuv2planeX(vLumFilter, vLumFilterSize,

606 lumSrcPtr, dest[0],

607 dstW, c->lumDither8, 0);

608 }

609

610 if (!((dstY & chrSkipMask) || isGray(dstFormat))) {

611 if (yuv2nv12cX) {

612 yuv2nv12cX(c, vChrFilter,

613 vChrFilterSize, chrUSrcPtr, chrVSrcPtr,

614 dest[1], chrDstW);

615 } else if (vChrFilterSize == 1) {

616 yuv2plane1(chrUSrcPtr[0], dest[1], chrDstW, c->chrDither8, 0);

617 yuv2plane1(chrVSrcPtr[0], dest[2], chrDstW, c->chrDither8, 3);

618 } else {

619 yuv2planeX(vChrFilter,

620 vChrFilterSize, chrUSrcPtr, dest[1],

621 chrDstW, c->chrDither8, 0);

622 yuv2planeX(vChrFilter,

623 vChrFilterSize, chrVSrcPtr, dest[2],

624 chrDstW, c->chrDither8, use_mmx_vfilter ? (c->uv_offx2 >> 1) : 3);

625 }

626 }

627

628 if (CONFIG_SWSCALE_ALPHA && alpPixBuf) {

629 if(use_mmx_vfilter){

630 vLumFilter= (int16_t *)c->alpMmxFilter;

631 }

632 if (vLumFilterSize == 1) {

633 yuv2plane1(alpSrcPtr[0], dest[3], dstW,

634 c->lumDither8, 0);

635 } else {

636 yuv2planeX(vLumFilter,

637 vLumFilterSize, alpSrcPtr, dest[3],

638 dstW, c->lumDither8, 0);

639 }

640 }

641 } else if (yuv2packedX) {

642 av_assert1(lumSrcPtr + vLumFilterSize - 1 < (const int16_t **)lumPixBuf + vLumBufSize * 2);

643 av_assert1(chrUSrcPtr + vChrFilterSize - 1 < (const int16_t **)chrUPixBuf + vChrBufSize * 2);

644 if (c->yuv2packed1 && vLumFilterSize == 1 &&

645 vChrFilterSize <= 2) { // unscaled RGB

646 int chrAlpha = vChrFilterSize == 1 ? 0 : vChrFilter[2 * dstY + 1];

647 yuv2packed1(c, *lumSrcPtr, chrUSrcPtr, chrVSrcPtr,

648 alpPixBuf ? *alpSrcPtr : NULL,

649 dest[0], dstW, chrAlpha, dstY);

650 } else if (c->yuv2packed2 && vLumFilterSize == 2 &&

651 vChrFilterSize == 2) { // bilinear upscale RGB

652 int lumAlpha = vLumFilter[2 * dstY + 1];

653 int chrAlpha = vChrFilter[2 * dstY + 1];

654 lumMmxFilter[2] =

655 lumMmxFilter[3] = vLumFilter[2 * dstY] * 0x10001;

656 chrMmxFilter[2] =

657 chrMmxFilter[3] = vChrFilter[2 * chrDstY] * 0x10001;

658 yuv2packed2(c, lumSrcPtr, chrUSrcPtr, chrVSrcPtr,

659 alpPixBuf ? alpSrcPtr : NULL,

660 dest[0], dstW, lumAlpha, chrAlpha, dstY);

661 } else { // general RGB

662 yuv2packedX(c, vLumFilter + dstY * vLumFilterSize,

663 lumSrcPtr, vLumFilterSize,

664 vChrFilter + dstY * vChrFilterSize,

665 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,

666 alpSrcPtr, dest[0], dstW, dstY);

667 }

668 } else {

669 av_assert1(!yuv2packed1 && !yuv2packed2);

670 yuv2anyX(c, vLumFilter + dstY * vLumFilterSize,

671 lumSrcPtr, vLumFilterSize,

672 vChrFilter + dstY * vChrFilterSize,

673 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,

674 alpSrcPtr, dest, dstW, dstY);

675 }

676 }

677 }

678 if (isPlanar(dstFormat) && isALPHA(dstFormat) && !alpPixBuf) {

679 int length = dstW;

680 int height = dstY - lastDstY;

681

682 if (is16BPS(dstFormat) || isNBPS(dstFormat)) {

683 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);

684 fillPlane16(dst[3], dstStride[3], length, height, lastDstY,

685 1, desc->comp[3].depth_minus1,

686 isBE(dstFormat));

687 } else

688 fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255);

689 }

690

691 #if HAVE_MMXEXT_INLINE

692 if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT)

693 __asm__ volatile ("sfence" ::: "memory");

694 #endif

695 emms_c();

696

697 /* store changed local vars back in the context */

698 c->dstY = dstY;

699 c->lumBufIndex = lumBufIndex;

700 c->chrBufIndex = chrBufIndex;

701 c->lastInLumBuf = lastInLumBuf;

702 c->lastInChrBuf = lastInChrBuf;

703

704 return dstY - lastDstY;

705 }

706

707 static av_cold void sws_init_swscale(SwsContext *c)

708 {

709 enum AVPixelFormat srcFormat = c->srcFormat;

710

711 ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX,

712 &c->yuv2nv12cX, &c->yuv2packed1,

713 &c->yuv2packed2, &c->yuv2packedX, &c->yuv2anyX);

714

715 ff_sws_init_input_funcs(c);

716

717

718 if (c->srcBpc == 8) {

719 if (c->dstBpc <= 14) {

720 c->hyScale = c->hcScale = hScale8To15_c;

721 if (c->flags & SWS_FAST_BILINEAR) {

722 c->hyscale_fast = hyscale_fast_c;

723 c->hcscale_fast = hcscale_fast_c;

724 }

725 } else {

726 c->hyScale = c->hcScale = hScale8To19_c;

727 }

728 } else {

729 c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c

730 : hScale16To15_c;

731 }

732

733 if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {

734 if (c->dstBpc <= 14) {

735 if (c->srcRange) {

736 c->lumConvertRange = lumRangeFromJpeg_c;

737 c->chrConvertRange = chrRangeFromJpeg_c;

738 } else {

739 c->lumConvertRange = lumRangeToJpeg_c;

740 c->chrConvertRange = chrRangeToJpeg_c;

741 }

742 } else {

743 if (c->srcRange) {

744 c->lumConvertRange = lumRangeFromJpeg16_c;

745 c->chrConvertRange = chrRangeFromJpeg16_c;

746 } else {

747 c->lumConvertRange = lumRangeToJpeg16_c;

748 c->chrConvertRange = chrRangeToJpeg16_c;

749 }

750 }

751 }

752

753 if (!(isGray(srcFormat) || isGray(c->dstFormat) ||

754 srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE))

755 c->needs_hcscale = 1;

756 }

757

758 SwsFunc ff_getSwsFunc(SwsContext *c)

759 {

760 sws_init_swscale(c);

761

762 if (ARCH_PPC)

763 ff_sws_init_swscale_ppc(c);

764 if (ARCH_X86)

765 ff_sws_init_swscale_x86(c);

766

767 return swscale;

768 }

769

770 static void reset_ptr(const uint8_t *src[], int format)

771 {

772 if (!isALPHA(format))

773 src[3] = NULL;

774 if (!isPlanar(format)) {

775 src[3] = src[2] = NULL;

776

777 if (!usePal(format))

778 src[1] = NULL;

779 }

780 }

781

782 static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt,

783 const int linesizes[4])

784 {

785 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);

786 int i;

787

788 for (i = 0; i < 4; i++) {

789 int plane = desc->comp[i].plane;

790 if (!data[plane] || !linesizes[plane])

791 return 0;

792 }

793

794 return 1;

795 }

796

797 static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst,

798 const uint16_t *src, int stride, int h)

799 {

800 int xp,yp;

801 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);

802

803 for (yp=0; yp<h; yp++) {

804 for (xp=0; xp+2<stride; xp+=3) {

805 int x, y, z, r, g, b;

806

807 if (desc->flags & AV_PIX_FMT_FLAG_BE) {

808 x = AV_RB16(src + xp + 0);

809 y = AV_RB16(src + xp + 1);

810 z = AV_RB16(src + xp + 2);

811 } else {

812 x = AV_RL16(src + xp + 0);

813 y = AV_RL16(src + xp + 1);

814 z = AV_RL16(src + xp + 2);

815 }

816

817 x = c->xyzgamma[x>>4];

818 y = c->xyzgamma[y>>4];

819 z = c->xyzgamma[z>>4];

820

821 // convert from XYZlinear to sRGBlinear

822 r = c->xyz2rgb_matrix[0][0] * x +

823 c->xyz2rgb_matrix[0][1] * y +

824 c->xyz2rgb_matrix[0][2] * z >> 12;

825 g = c->xyz2rgb_matrix[1][0] * x +

826 c->xyz2rgb_matrix[1][1] * y +

827 c->xyz2rgb_matrix[1][2] * z >> 12;

828 b = c->xyz2rgb_matrix[2][0] * x +

829 c->xyz2rgb_matrix[2][1] * y +

830 c->xyz2rgb_matrix[2][2] * z >> 12;

831

832 // limit values to 12-bit depth

833 r = av_clip_c(r,0,4095);

834 g = av_clip_c(g,0,4095);

835 b = av_clip_c(b,0,4095);

836

837 // convert from sRGBlinear to RGB and scale from 12bit to 16bit

838 if (desc->flags & AV_PIX_FMT_FLAG_BE) {

839 AV_WB16(dst + xp + 0, c->rgbgamma[r] << 4);

840 AV_WB16(dst + xp + 1, c->rgbgamma[g] << 4);

841 AV_WB16(dst + xp + 2, c->rgbgamma[b] << 4);

842 } else {

843 AV_WL16(dst + xp + 0, c->rgbgamma[r] << 4);

844 AV_WL16(dst + xp + 1, c->rgbgamma[g] << 4);

845 AV_WL16(dst + xp + 2, c->rgbgamma[b] << 4);

846 }

847 }

848 src += stride;

849 dst += stride;

850 }

851 }

852

853 static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst,

854 const uint16_t *src, int stride, int h)

855 {

856 int xp,yp;

857 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);

858

859 for (yp=0; yp<h; yp++) {

860 for (xp=0; xp+2<stride; xp+=3) {

861 int x, y, z, r, g, b;

862

863 if (desc->flags & AV_PIX_FMT_FLAG_BE) {

864 r = AV_RB16(src + xp + 0);

865 g = AV_RB16(src + xp + 1);

866 b = AV_RB16(src + xp + 2);

867 } else {

868 r = AV_RL16(src + xp + 0);

869 g = AV_RL16(src + xp + 1);

870 b = AV_RL16(src + xp + 2);

871 }

872

873 r = c->rgbgammainv[r>>4];

874 g = c->rgbgammainv[g>>4];

875 b = c->rgbgammainv[b>>4];

876

877 // convert from sRGBlinear to XYZlinear

878 x = c->rgb2xyz_matrix[0][0] * r +

879 c->rgb2xyz_matrix[0][1] * g +

880 c->rgb2xyz_matrix[0][2] * b >> 12;

881 y = c->rgb2xyz_matrix[1][0] * r +

882 c->rgb2xyz_matrix[1][1] * g +

883 c->rgb2xyz_matrix[1][2] * b >> 12;

884 z = c->rgb2xyz_matrix[2][0] * r +

885 c->rgb2xyz_matrix[2][1] * g +

886 c->rgb2xyz_matrix[2][2] * b >> 12;

887

888 // limit values to 12-bit depth

889 x = av_clip_c(x,0,4095);

890 y = av_clip_c(y,0,4095);

891 z = av_clip_c(z,0,4095);

892

893 // convert from XYZlinear to X'Y'Z' and scale from 12bit to 16bit

894 if (desc->flags & AV_PIX_FMT_FLAG_BE) {

895 AV_WB16(dst + xp + 0, c->xyzgammainv[x] << 4);

896 AV_WB16(dst + xp + 1, c->xyzgammainv[y] << 4);

897 AV_WB16(dst + xp + 2, c->xyzgammainv[z] << 4);

898 } else {

899 AV_WL16(dst + xp + 0, c->xyzgammainv[x] << 4);

900 AV_WL16(dst + xp + 1, c->xyzgammainv[y] << 4);

901 AV_WL16(dst + xp + 2, c->xyzgammainv[z] << 4);

902 }

903 }

904 src += stride;

905 dst += stride;

906 }

907 }

908

909 /**

910 * swscale wrapper, so we don't need to export the SwsContext.

911 * Assumes planar YUV to be in YUV order instead of YVU.

912 */

913 int attribute_align_arg sws_scale(struct SwsContext *c,

914 const uint8_t * const srcSlice[],

915 const int srcStride[], int srcSliceY,

916 int srcSliceH, uint8_t *const dst[],

917 const int dstStride[])

918 {

919 int i, ret;

920 const uint8_t *src2[4];

921 uint8_t *dst2[4];

922 uint8_t *rgb0_tmp = NULL;

923

924 if (!srcSlice || !dstStride || !dst || !srcSlice) {

925 av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");

926 return 0;

927 }

928 memcpy(src2, srcSlice, sizeof(src2));

929 memcpy(dst2, dst, sizeof(dst2));

930

931 // do not mess up sliceDir if we have a "trailing" 0-size slice

932 if (srcSliceH == 0)

933 return 0;

934

935 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {

936 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");

937 return 0;

938 }

939 if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {

940 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");

941 return 0;

942 }

943

944 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

945 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

946 return 0;

947 }

948 if (c->sliceDir == 0) {

949 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

950 }

951

952 if (usePal(c->srcFormat)) {

953 for (i = 0; i < 256; i++) {

954 int p, r, g, b, y, u, v, a = 0xff;

955 if (c->srcFormat == AV_PIX_FMT_PAL8) {

956 p = ((const uint32_t *)(srcSlice[1]))[i];

957 a = (p >> 24) & 0xFF;

958 r = (p >> 16) & 0xFF;

959 g = (p >> 8) & 0xFF;

960 b = p & 0xFF;

961 } else if (c->srcFormat == AV_PIX_FMT_RGB8) {

962 r = ( i >> 5 ) * 36;

963 g = ((i >> 2) & 7) * 36;

964 b = ( i & 3) * 85;

965 } else if (c->srcFormat == AV_PIX_FMT_BGR8) {

966 b = ( i >> 6 ) * 85;

967 g = ((i >> 3) & 7) * 36;

968 r = ( i & 7) * 36;

969 } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {

970 r = ( i >> 3 ) * 255;

971 g = ((i >> 1) & 3) * 85;

972 b = ( i & 1) * 255;

973 } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) {

974 r = g = b = i;

975 } else {

976 av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);

977 b = ( i >> 3 ) * 255;

978 g = ((i >> 1) & 3) * 85;

979 r = ( i & 1) * 255;

980 }

981 #define RGB2YUV_SHIFT 15

982 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

983 #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

984 #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

985 #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

986 #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

987 #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

988 #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

989 #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

990 #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

991

992 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);

993 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);

994 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);

995 c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24);

996

997 switch (c->dstFormat) {

998 case AV_PIX_FMT_BGR32:

999 #if !HAVE_BIGENDIAN

1000 case AV_PIX_FMT_RGB24:

1001 #endif

1002 c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24);

1003 break;

1004 case AV_PIX_FMT_BGR32_1:

1005 #if HAVE_BIGENDIAN

1006 case AV_PIX_FMT_BGR24:

1007 #endif

1008 c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24);

1009 break;

1010 case AV_PIX_FMT_RGB32_1:

1011 #if HAVE_BIGENDIAN

1012 case AV_PIX_FMT_RGB24:

1013 #endif

1014 c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24);

1015 break;

1016 case AV_PIX_FMT_RGB32:

1017 #if !HAVE_BIGENDIAN

1018 case AV_PIX_FMT_BGR24:

1019 #endif

1020 default:

1021 c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24);

1022 }

1023 }

1024 }

1025

1026 if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {

1027 uint8_t *base;

1028 int x,y;

1029 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);

1030 if (!rgb0_tmp)

1031 return AVERROR(ENOMEM);

1032

1033 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;

1034 for (y=0; y<srcSliceH; y++){

1035 memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);

1036 for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {

1037 base[ srcStride[0]*y + x] = 0xFF;

1038 }

1039 }

1040 src2[0] = base;

1041 }

1042

1043 if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {

1044 uint8_t *base;

1045 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);

1046 if (!rgb0_tmp)

1047 return AVERROR(ENOMEM);

1048

1049 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;

1050

1051 xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH);

1052 src2[0] = base;

1053 }

1054

1055 if (!srcSliceY && (c->flags & SWS_BITEXACT) && c->dither == SWS_DITHER_ED && c->dither_error[0])

1056 for (i = 0; i < 4; i++)

1057 memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2));

1058

1059

1060 // copy strides, so they can safely be modified

1061 if (c->sliceDir == 1) {

1062 // slices go from top to bottom

1063 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],

1064 srcStride[3] };

1065 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],

1066 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 + srcSliceH == c->srcH)

1073 c->sliceDir = 0;

1074

1075 ret = c->swscale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,

1076 dstStride2);

1077 } else {

1078 // slices go from bottom to top => we flip the image internally

1079 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],

1080 -srcStride[3] };

1081 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],

1082 -dstStride[3] };

1083

1084 src2[0] += (srcSliceH - 1) * srcStride[0];

1085 if (!usePal(c->srcFormat))

1086 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];

1087 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];

1088 src2[3] += (srcSliceH - 1) * srcStride[3];

1089 dst2[0] += ( c->dstH - 1) * dstStride[0];

1090 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];

1091 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];

1092 dst2[3] += ( c->dstH - 1) * dstStride[3];

1093

1094 reset_ptr(src2, c->srcFormat);

1095 reset_ptr((void*)dst2, c->dstFormat);

1096

1097 /* reset slice direction at end of frame */

1098 if (!srcSliceY)

1099 c->sliceDir = 0;

1100

1101 ret = c->swscale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,

1102 srcSliceH, dst2, dstStride2);

1103 }

1104

1105

1106 if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {

1107 /* replace on the same data */

1108 rgb48Toxyz12(c, (uint16_t*)dst2[0], (const uint16_t*)dst2[0], dstStride[0]/2, ret);

1109 }

1110

1111 av_free(rgb0_tmp);

1112 return ret;

1113 }

1114

Generated on Sat Jan 25 2014 19:52:07 for FFmpeg by doxygen 1.8.2