FFmpeg: libavcodec/svq1enc.c Source File

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svq1enc.c

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1 /*

2 * SVQ1 Encoder

4 *

5 * This file is part of FFmpeg.

6 *

7 * FFmpeg is free software; you can redistribute it and/or

8 * modify it under the terms of the GNU Lesser General Public

9 * License as published by the Free Software Foundation; either

10 * version 2.1 of the License, or (at your option) any later version.

11 *

12 * FFmpeg is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

15 * Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public

18 * License along with FFmpeg; if not, write to the Free Software

19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

22 /**

23 * @file

24 * Sorenson Vector Quantizer #1 (SVQ1) video codec.

25 * For more information of the SVQ1 algorithm, visit:

26 * http://www.pcisys.net/~melanson/codecs/

27 */

29 #include "avcodec.h"

30 #include "hpeldsp.h"

31 #include "me_cmp.h"

32 #include "mpegvideo.h"

33 #include "h263.h"

34 #include "internal.h"

35 #include "mpegutils.h"

36 #include "svq1.h"

37 #include "svq1enc.h"

38 #include "svq1enc_cb.h"

39 #include "libavutil/avassert.h"

42 static void svq1_write_header(SVQ1EncContext *s, int frame_type)

43 {

44 int i;

46 /* frame code */

47 put_bits(&s->pb, 22, 0x20);

49 /* temporal reference (sure hope this is a "don't care") */

50 put_bits(&s->pb, 8, 0x00);

52 /* frame type */

53 put_bits(&s->pb, 2, frame_type - 1);

55 if (frame_type == AV_PICTURE_TYPE_I) {

56 /* no checksum since frame code is 0x20 */

57 /* no embedded string either */

58 /* output 5 unknown bits (2 + 2 + 1) */

59 put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */

61 i = ff_match_2uint16((void*)ff_svq1_frame_size_table,

62 FF_ARRAY_ELEMS(ff_svq1_frame_size_table),

63 s->frame_width, s->frame_height);

64 put_bits(&s->pb, 3, i);

66 if (i == 7) {

67 put_bits(&s->pb, 12, s->frame_width);

68 put_bits(&s->pb, 12, s->frame_height);

69 }

70 }

72 /* no checksum or extra data (next 2 bits get 0) */

73 put_bits(&s->pb, 2, 0);

74 }

76 #define QUALITY_THRESHOLD 100

77 #define THRESHOLD_MULTIPLIER 0.6

79 static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2,

80 intptr_t size)

81 {

82 int score = 0, i;

84 for (i = 0; i < size; i++)

85 score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);

86 return score;

87 }

89 static int encode_block(SVQ1EncContext *s, uint8_t *src, uint8_t *ref,

90 uint8_t *decoded, int stride, int level,

91 int threshold, int lambda, int intra)

92 {

93 int count, y, x, i, j, split, best_mean, best_score, best_count;

94 int best_vector[6];

95 int block_sum[7] = { 0, 0, 0, 0, 0, 0 };

96 int w = 2 << (level + 2 >> 1);

97 int h = 2 << (level + 1 >> 1);

98 int size = w * h;

99 int16_t (*block)[256] = s->encoded_block_levels[level];

100 const int8_t *codebook_sum, *codebook;

101 const uint16_t(*mean_vlc)[2];

102 const uint8_t(*multistage_vlc)[2];

103

104 best_score = 0;

105 // FIXME: Optimize, this does not need to be done multiple times.

106 if (intra) {

107 codebook_sum = svq1_intra_codebook_sum[level];

108 codebook = ff_svq1_intra_codebooks[level];

109 mean_vlc = ff_svq1_intra_mean_vlc;

110 multistage_vlc = ff_svq1_intra_multistage_vlc[level];

111 for (y = 0; y < h; y++) {

112 for (x = 0; x < w; x++) {

113 int v = src[x + y * stride];

114 block[0][x + w * y] = v;

115 best_score += v * v;

116 block_sum[0] += v;

117 }

118 }

119 } else {

120 codebook_sum = svq1_inter_codebook_sum[level];

121 codebook = ff_svq1_inter_codebooks[level];

122 mean_vlc = ff_svq1_inter_mean_vlc + 256;

123 multistage_vlc = ff_svq1_inter_multistage_vlc[level];

124 for (y = 0; y < h; y++) {

125 for (x = 0; x < w; x++) {

126 int v = src[x + y * stride] - ref[x + y * stride];

127 block[0][x + w * y] = v;

128 best_score += v * v;

129 block_sum[0] += v;

130 }

131 }

132 }

133

134 best_count = 0;

135 best_score -= (int)((unsigned)block_sum[0] * block_sum[0] >> (level + 3));

136 best_mean = block_sum[0] + (size >> 1) >> (level + 3);

137

138 if (level < 4) {

139 for (count = 1; count < 7; count++) {

140 int best_vector_score = INT_MAX;

141 int best_vector_sum = -999, best_vector_mean = -999;

142 const int stage = count - 1;

143 const int8_t *vector;

144

145 for (i = 0; i < 16; i++) {

146 int sum = codebook_sum[stage * 16 + i];

147 int sqr, diff, score;

148

149 vector = codebook + stage * size * 16 + i * size;

150 sqr = s->ssd_int8_vs_int16(vector, block[stage], size);

151 diff = block_sum[stage] - sum;

152 score = sqr - (diff * (int64_t)diff >> (level + 3)); // FIXME: 64bit slooow

153 if (score < best_vector_score) {

154 int mean = diff + (size >> 1) >> (level + 3);

155 av_assert2(mean > -300 && mean < 300);

156 mean = av_clip(mean, intra ? 0 : -256, 255);

157 best_vector_score = score;

158 best_vector[stage] = i;

159 best_vector_sum = sum;

160 best_vector_mean = mean;

161 }

162 }

163 av_assert0(best_vector_mean != -999);

164 vector = codebook + stage * size * 16 + best_vector[stage] * size;

165 for (j = 0; j < size; j++)

166 block[stage + 1][j] = block[stage][j] - vector[j];

167 block_sum[stage + 1] = block_sum[stage] - best_vector_sum;

168 best_vector_score += lambda *

169 (+1 + 4 * count +

170 multistage_vlc[1 + count][1]

171 + mean_vlc[best_vector_mean][1]);

172

173 if (best_vector_score < best_score) {

174 best_score = best_vector_score;

175 best_count = count;

176 best_mean = best_vector_mean;

177 }

178 }

179 }

180

181 split = 0;

182 if (best_score > threshold && level) {

183 int score = 0;

184 int offset = level & 1 ? stride * h / 2 : w / 2;

185 PutBitContext backup[6];

186

187 for (i = level - 1; i >= 0; i--)

188 backup[i] = s->reorder_pb[i];

189 score += encode_block(s, src, ref, decoded, stride, level - 1,

190 threshold >> 1, lambda, intra);

191 score += encode_block(s, src + offset, ref + offset, decoded + offset,

192 stride, level - 1, threshold >> 1, lambda, intra);

193 score += lambda;

194

195 if (score < best_score) {

196 best_score = score;

197 split = 1;

198 } else {

199 for (i = level - 1; i >= 0; i--)

200 s->reorder_pb[i] = backup[i];

201 }

202 }

203 if (level > 0)

204 put_bits(&s->reorder_pb[level], 1, split);

205

206 if (!split) {

207 av_assert1(best_mean >= 0 && best_mean < 256 || !intra);

208 av_assert1(best_mean >= -256 && best_mean < 256);

209 av_assert1(best_count >= 0 && best_count < 7);

210 av_assert1(level < 4 || best_count == 0);

211

212 /* output the encoding */

213 put_bits(&s->reorder_pb[level],

214 multistage_vlc[1 + best_count][1],

215 multistage_vlc[1 + best_count][0]);

216 put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],

217 mean_vlc[best_mean][0]);

218

219 for (i = 0; i < best_count; i++) {

220 av_assert2(best_vector[i] >= 0 && best_vector[i] < 16);

221 put_bits(&s->reorder_pb[level], 4, best_vector[i]);

222 }

223

224 for (y = 0; y < h; y++)

225 for (x = 0; x < w; x++)

226 decoded[x + y * stride] = src[x + y * stride] -

227 block[best_count][x + w * y] +

228 best_mean;

229 }

230

231 return best_score;

232 }

233

234 static void init_block_index(MpegEncContext *s){

235 s->block_index[0]= s->b8_stride*(s->mb_y*2 ) + s->mb_x*2;

236 s->block_index[1]= s->b8_stride*(s->mb_y*2 ) + 1 + s->mb_x*2;

237 s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) + s->mb_x*2;

238 s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) + 1 + s->mb_x*2;

239 s->block_index[4]= s->mb_stride*(s->mb_y + 1) + s->b8_stride*s->mb_height*2 + s->mb_x;

240 s->block_index[5]= s->mb_stride*(s->mb_y + s->mb_height + 2) + s->b8_stride*s->mb_height*2 + s->mb_x;

241 }

242

243 static int svq1_encode_plane(SVQ1EncContext *s, int plane,

244 unsigned char *src_plane,

245 unsigned char *ref_plane,

246 unsigned char *decoded_plane,

247 int width, int height, int src_stride, int stride)

248 {

249 const AVFrame *f = s->avctx->coded_frame;

250 int x, y;

251 int i;

252 int block_width, block_height;

253 int level;

254 int threshold[6];

255 uint8_t *src = s->scratchbuf + stride * 32;

256 const int lambda = (f->quality * f->quality) >>

257 (2 * FF_LAMBDA_SHIFT);

258

259 /* figure out the acceptable level thresholds in advance */

260 threshold[5] = QUALITY_THRESHOLD;

261 for (level = 4; level >= 0; level--)

262 threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;

263

264 block_width = (width + 15) / 16;

265 block_height = (height + 15) / 16;

266

267 if (f->pict_type == AV_PICTURE_TYPE_P) {

268 s->m.avctx = s->avctx;

269 s->m.current_picture_ptr = &s->m.current_picture;

270 s->m.last_picture_ptr = &s->m.last_picture;

271 s->m.last_picture.f->data[0] = ref_plane;

272 s->m.linesize =

273 s->m.last_picture.f->linesize[0] =

274 s->m.new_picture.f->linesize[0] =

275 s->m.current_picture.f->linesize[0] = stride;

276 s->m.width = width;

277 s->m.height = height;

278 s->m.mb_width = block_width;

279 s->m.mb_height = block_height;

280 s->m.mb_stride = s->m.mb_width + 1;

281 s->m.b8_stride = 2 * s->m.mb_width + 1;

282 s->m.f_code = 1;

283 s->m.pict_type = f->pict_type;

284 s->m.me_method = s->avctx->me_method;

285 s->m.me.scene_change_score = 0;

286 s->m.flags = s->avctx->flags;

287 // s->m.out_format = FMT_H263;

288 // s->m.unrestricted_mv = 1;

289 s->m.lambda = f->quality;

290 s->m.qscale = s->m.lambda * 139 +

291 FF_LAMBDA_SCALE * 64 >>

292 FF_LAMBDA_SHIFT + 7;

293 s->m.lambda2 = s->m.lambda * s->m.lambda +

294 FF_LAMBDA_SCALE / 2 >>

295 FF_LAMBDA_SHIFT;

296

297 if (!s->motion_val8[plane]) {

298 s->motion_val8[plane] = av_mallocz((s->m.b8_stride *

299 block_height * 2 + 2) *

300 2 * sizeof(int16_t));

301 s->motion_val16[plane] = av_mallocz((s->m.mb_stride *

302 (block_height + 2) + 1) *

303 2 * sizeof(int16_t));

304 if (!s->motion_val8[plane] || !s->motion_val16[plane])

305 return AVERROR(ENOMEM);

306 }

307

308 s->m.mb_type = s->mb_type;

309

310 // dummies, to avoid segfaults

311 s->m.current_picture.mb_mean = (uint8_t *)s->dummy;

312 s->m.current_picture.mb_var = (uint16_t *)s->dummy;

313 s->m.current_picture.mc_mb_var = (uint16_t *)s->dummy;

314 s->m.current_picture.mb_type = s->dummy;

315

316 s->m.current_picture.motion_val[0] = s->motion_val8[plane] + 2;

317 s->m.p_mv_table = s->motion_val16[plane] +

318 s->m.mb_stride + 1;

319 s->m.mecc = s->mecc; // move

320 ff_init_me(&s->m);

321

322 s->m.me.dia_size = s->avctx->dia_size;

323 s->m.first_slice_line = 1;

324 for (y = 0; y < block_height; y++) {

325 s->m.new_picture.f->data[0] = src - y * 16 * stride; // ugly

326 s->m.mb_y = y;

327

328 for (i = 0; i < 16 && i + 16 * y < height; i++) {

329 memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],

330 width);

331 for (x = width; x < 16 * block_width; x++)

332 src[i * stride + x] = src[i * stride + x - 1];

333 }

334 for (; i < 16 && i + 16 * y < 16 * block_height; i++)

335 memcpy(&src[i * stride], &src[(i - 1) * stride],

336 16 * block_width);

337

338 for (x = 0; x < block_width; x++) {

339 s->m.mb_x = x;

340 init_block_index(&s->m);

341

342 ff_estimate_p_frame_motion(&s->m, x, y);

343 }

344 s->m.first_slice_line = 0;

345 }

346

347 ff_fix_long_p_mvs(&s->m);

348 ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code,

349 CANDIDATE_MB_TYPE_INTER, 0);

350 }

351

352 s->m.first_slice_line = 1;

353 for (y = 0; y < block_height; y++) {

354 for (i = 0; i < 16 && i + 16 * y < height; i++) {

355 memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],

356 width);

357 for (x = width; x < 16 * block_width; x++)

358 src[i * stride + x] = src[i * stride + x - 1];

359 }

360 for (; i < 16 && i + 16 * y < 16 * block_height; i++)

361 memcpy(&src[i * stride], &src[(i - 1) * stride], 16 * block_width);

362

363 s->m.mb_y = y;

364 for (x = 0; x < block_width; x++) {

365 uint8_t reorder_buffer[2][6][7 * 32];

366 int count[2][6];

367 int offset = y * 16 * stride + x * 16;

368 uint8_t *decoded = decoded_plane + offset;

369 uint8_t *ref = ref_plane + offset;

370 int score[4] = { 0, 0, 0, 0 }, best;

371 uint8_t *temp = s->scratchbuf;

372

373 if (s->pb.buf_end - s->pb.buf -

374 (put_bits_count(&s->pb) >> 3) < 3000) { // FIXME: check size

375 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

376 return -1;

377 }

378

379 s->m.mb_x = x;

380 init_block_index(&s->m);

381

382 if (f->pict_type == AV_PICTURE_TYPE_I ||

383 (s->m.mb_type[x + y * s->m.mb_stride] &

384 CANDIDATE_MB_TYPE_INTRA)) {

385 for (i = 0; i < 6; i++)

386 init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i],

387 7 * 32);

388 if (f->pict_type == AV_PICTURE_TYPE_P) {

389 const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];

390 put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);

391 score[0] = vlc[1] * lambda;

392 }

393 score[0] += encode_block(s, src + 16 * x, NULL, temp, stride,

394 5, 64, lambda, 1);

395 for (i = 0; i < 6; i++) {

396 count[0][i] = put_bits_count(&s->reorder_pb[i]);

397 flush_put_bits(&s->reorder_pb[i]);

398 }

399 } else

400 score[0] = INT_MAX;

401

402 best = 0;

403

404 if (f->pict_type == AV_PICTURE_TYPE_P) {

405 const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];

406 int mx, my, pred_x, pred_y, dxy;

407 int16_t *motion_ptr;

408

409 motion_ptr = ff_h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);

410 if (s->m.mb_type[x + y * s->m.mb_stride] &

411 CANDIDATE_MB_TYPE_INTER) {

412 for (i = 0; i < 6; i++)

413 init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i],

414 7 * 32);

415

416 put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);

417

418 s->m.pb = s->reorder_pb[5];

419 mx = motion_ptr[0];

420 my = motion_ptr[1];

421 av_assert1(mx >= -32 && mx <= 31);

422 av_assert1(my >= -32 && my <= 31);

423 av_assert1(pred_x >= -32 && pred_x <= 31);

424 av_assert1(pred_y >= -32 && pred_y <= 31);

425 ff_h263_encode_motion(&s->m, mx - pred_x, 1);

426 ff_h263_encode_motion(&s->m, my - pred_y, 1);

427 s->reorder_pb[5] = s->m.pb;

428 score[1] += lambda * put_bits_count(&s->reorder_pb[5]);

429

430 dxy = (mx & 1) + 2 * (my & 1);

431

432 s->hdsp.put_pixels_tab[0][dxy](temp + 16*stride,

433 ref + (mx >> 1) +

434 stride * (my >> 1),

435 stride, 16);

436

437 score[1] += encode_block(s, src + 16 * x, temp + 16*stride,

438 decoded, stride, 5, 64, lambda, 0);

439 best = score[1] <= score[0];

440

441 vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];

442 score[2] = s->mecc.sse[0](NULL, src + 16 * x, ref,

443 stride, 16);

444 score[2] += vlc[1] * lambda;

445 if (score[2] < score[best] && mx == 0 && my == 0) {

446 best = 2;

447 s->hdsp.put_pixels_tab[0][0](decoded, ref, stride, 16);

448 put_bits(&s->pb, vlc[1], vlc[0]);

449 }

450 }

451

452 if (best == 1) {

453 for (i = 0; i < 6; i++) {

454 count[1][i] = put_bits_count(&s->reorder_pb[i]);

455 flush_put_bits(&s->reorder_pb[i]);

456 }

457 } else {

458 motion_ptr[0] =

459 motion_ptr[1] =

460 motion_ptr[2] =

461 motion_ptr[3] =

462 motion_ptr[0 + 2 * s->m.b8_stride] =

463 motion_ptr[1 + 2 * s->m.b8_stride] =

464 motion_ptr[2 + 2 * s->m.b8_stride] =

465 motion_ptr[3 + 2 * s->m.b8_stride] = 0;

466 }

467 }

468

469 s->rd_total += score[best];

470

471 if (best != 2)

472 for (i = 5; i >= 0; i--)

473 avpriv_copy_bits(&s->pb, reorder_buffer[best][i],

474 count[best][i]);

475 if (best == 0)

476 s->hdsp.put_pixels_tab[0][0](decoded, temp, stride, 16);

477 }

478 s->m.first_slice_line = 0;

479 }

480 return 0;

481 }

482

483 static av_cold int svq1_encode_end(AVCodecContext *avctx)

484 {

485 SVQ1EncContext *const s = avctx->priv_data;

486 int i;

487

488 av_log(avctx, AV_LOG_DEBUG, "RD: %f\n",

489 s->rd_total / (double)(avctx->width * avctx->height *

490 avctx->frame_number));

491

492 s->m.mb_type = NULL;

493 ff_mpv_common_end(&s->m);

494

495 av_freep(&s->m.me.scratchpad);

496 av_freep(&s->m.me.map);

497 av_freep(&s->m.me.score_map);

498 av_freep(&s->mb_type);

499 av_freep(&s->dummy);

500 av_freep(&s->scratchbuf);

501

502 for (i = 0; i < 3; i++) {

503 av_freep(&s->motion_val8[i]);

504 av_freep(&s->motion_val16[i]);

505 }

506

507 av_frame_free(&s->current_picture);

508 av_frame_free(&s->last_picture);

509 av_frame_free(&avctx->coded_frame);

510

511 return 0;

512 }

513

514 static av_cold int svq1_encode_init(AVCodecContext *avctx)

515 {

516 SVQ1EncContext *const s = avctx->priv_data;

517 int ret;

518

519 ff_hpeldsp_init(&s->hdsp, avctx->flags);

520 ff_me_cmp_init(&s->mecc, avctx);

521 ff_mpegvideoencdsp_init(&s->m.mpvencdsp, avctx);

522

523 avctx->coded_frame = av_frame_alloc();

524 s->current_picture = av_frame_alloc();

525 s->last_picture = av_frame_alloc();

526 if (!avctx->coded_frame || !s->current_picture || !s->last_picture) {

527 svq1_encode_end(avctx);

528 return AVERROR(ENOMEM);

529 }

530

531 s->frame_width = avctx->width;

532 s->frame_height = avctx->height;

533

534 s->y_block_width = (s->frame_width + 15) / 16;

535 s->y_block_height = (s->frame_height + 15) / 16;

536

537 s->c_block_width = (s->frame_width / 4 + 15) / 16;

538 s->c_block_height = (s->frame_height / 4 + 15) / 16;

539

540 s->avctx = avctx;

541 s->m.avctx = avctx;

542

543 if ((ret = ff_mpv_common_init(&s->m)) < 0) {

544 svq1_encode_end(avctx);

545 return ret;

546 }

547

548 s->m.picture_structure = PICT_FRAME;

549 s->m.me.temp =

550 s->m.me.scratchpad = av_mallocz((avctx->width + 64) *

551 2 * 16 * 2 * sizeof(uint8_t));

552 s->m.me.map = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));

553 s->m.me.score_map = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));

554 s->mb_type = av_mallocz((s->y_block_width + 1) *

555 s->y_block_height * sizeof(int16_t));

556 s->dummy = av_mallocz((s->y_block_width + 1) *

557 s->y_block_height * sizeof(int32_t));

558 s->ssd_int8_vs_int16 = ssd_int8_vs_int16_c;

559

560 if (!s->m.me.scratchpad || !s->m.me.map || !s->m.me.score_map ||

561 !s->mb_type || !s->dummy) {

562 svq1_encode_end(avctx);

563 return AVERROR(ENOMEM);

564 }

565

566 if (ARCH_PPC)

567 ff_svq1enc_init_ppc(s);

568 if (ARCH_X86)

569 ff_svq1enc_init_x86(s);

570

571 ff_h263_encode_init(&s->m); // mv_penalty

572

573 return 0;

574 }

575

576 static int svq1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,

577 const AVFrame *pict, int *got_packet)

578 {

579 SVQ1EncContext *const s = avctx->priv_data;

580 AVFrame *const p = avctx->coded_frame;

581 int i, ret;

582

583 if ((ret = ff_alloc_packet2(avctx, pkt, s->y_block_width * s->y_block_height *

584 MAX_MB_BYTES*3 + FF_MIN_BUFFER_SIZE)) < 0)

585 return ret;

586

587 if (avctx->pix_fmt != AV_PIX_FMT_YUV410P) {

588 av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");

589 return -1;

590 }

591

592 if (!s->current_picture->data[0]) {

593 if ((ret = ff_get_buffer(avctx, s->current_picture, 0)) < 0) {

594 return ret;

595 }

596 }

597 if (!s->last_picture->data[0]) {

598 ret = ff_get_buffer(avctx, s->last_picture, 0);

599 if (ret < 0)

600 return ret;

601 }

602 if (!s->scratchbuf) {

603 s->scratchbuf = av_malloc_array(s->current_picture->linesize[0], 16 * 3);

604 if (!s->scratchbuf)

605 return AVERROR(ENOMEM);

606 }

607

608 FFSWAP(AVFrame*, s->current_picture, s->last_picture);

609

610 init_put_bits(&s->pb, pkt->data, pkt->size);

611

612 p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ?

613 AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;

614 p->key_frame = p->pict_type == AV_PICTURE_TYPE_I;

615 p->quality = pict->quality;

616

617 svq1_write_header(s, p->pict_type);

618 for (i = 0; i < 3; i++)

619 if (svq1_encode_plane(s, i,

620 pict->data[i],

621 s->last_picture->data[i],

622 s->current_picture->data[i],

623 s->frame_width / (i ? 4 : 1),

624 s->frame_height / (i ? 4 : 1),

625 pict->linesize[i],

626 s->current_picture->linesize[i]) < 0)

627 return -1;

628

629 // avpriv_align_put_bits(&s->pb);

630 while (put_bits_count(&s->pb) & 31)

631 put_bits(&s->pb, 1, 0);

632

633 flush_put_bits(&s->pb);

634

635 pkt->size = put_bits_count(&s->pb) / 8;

636 if (p->pict_type == AV_PICTURE_TYPE_I)

637 pkt->flags |= AV_PKT_FLAG_KEY;

638 *got_packet = 1;

639

640 return 0;

641 }

642

643 AVCodec ff_svq1_encoder = {

644 .name = "svq1",

645 .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),

646 .type = AVMEDIA_TYPE_VIDEO,

647 .id = AV_CODEC_ID_SVQ1,

648 .priv_data_size = sizeof(SVQ1EncContext),

649 .init = svq1_encode_init,

650 .encode2 = svq1_encode_frame,

651 .close = svq1_encode_end,

652 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,

653 AV_PIX_FMT_NONE },

654 };

Generated on Sun Mar 8 2015 02:35:00 for FFmpeg by doxygen 1.8.2