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[ffmpeg] / libavcodec / svq1enc.c
1 /*
2  * SVQ1 Encoder
3  * Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
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  */
21
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  */
28
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"
40
41
42 static void svq1_write_header(SVQ1EncContext *s, int frame_type)
43 {
44     int i;
45
46     /* frame code */
47     put_bits(&s->pb, 22, 0x20);
48
49     /* temporal reference (sure hope this is a "don't care") */
50     put_bits(&s->pb, 8, 0x00);
51
52     /* frame type */
53     put_bits(&s->pb, 2, frame_type - 1);
54
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 */
60
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);
65
66         if (i == 7) {
67             put_bits(&s->pb, 12, s->frame_width);
68             put_bits(&s->pb, 12, s->frame_height);
69         }
70     }
71
72     /* no checksum or extra data (next 2 bits get 0) */
73     put_bits(&s->pb, 2, 0);
74 }
75
76 #define QUALITY_THRESHOLD    100
77 #define THRESHOLD_MULTIPLIER 0.6
78
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;
83
84     for (i = 0; i < size; i++)
85         score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
86     return score;
87 }
88
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     int x, y;
250     int i;
251     int block_width, block_height;
252     int level;
253     int threshold[6];
254     uint8_t *src     = s->scratchbuf + stride * 32;
255     const int lambda = (s->quality * s->quality) >>
256                        (2 * FF_LAMBDA_SHIFT);
257
258     /* figure out the acceptable level thresholds in advance */
259     threshold[5] = QUALITY_THRESHOLD;
260     for (level = 4; level >= 0; level--)
261         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
262
263     block_width  = (width  + 15) / 16;
264     block_height = (height + 15) / 16;
265
266     if (s->pict_type == AV_PICTURE_TYPE_P) {
267         s->m.avctx                         = s->avctx;
268         s->m.current_picture_ptr           = &s->m.current_picture;
269         s->m.last_picture_ptr              = &s->m.last_picture;
270         s->m.last_picture.f->data[0]        = ref_plane;
271         s->m.linesize                      =
272         s->m.last_picture.f->linesize[0]    =
273         s->m.new_picture.f->linesize[0]     =
274         s->m.current_picture.f->linesize[0] = stride;
275         s->m.width                         = width;
276         s->m.height                        = height;
277         s->m.mb_width                      = block_width;
278         s->m.mb_height                     = block_height;
279         s->m.mb_stride                     = s->m.mb_width + 1;
280         s->m.b8_stride                     = 2 * s->m.mb_width + 1;
281         s->m.f_code                        = 1;
282         s->m.pict_type                     = s->pict_type;
283         s->m.me_method                     = s->avctx->me_method;
284         s->m.me.scene_change_score         = 0;
285         // s->m.out_format                    = FMT_H263;
286         // s->m.unrestricted_mv               = 1;
287         s->m.lambda                        = s->quality;
288         s->m.qscale                        = s->m.lambda * 139 +
289                                              FF_LAMBDA_SCALE * 64 >>
290                                              FF_LAMBDA_SHIFT + 7;
291         s->m.lambda2                       = s->m.lambda * s->m.lambda +
292                                              FF_LAMBDA_SCALE / 2 >>
293                                              FF_LAMBDA_SHIFT;
294
295         if (!s->motion_val8[plane]) {
296             s->motion_val8[plane]  = av_mallocz((s->m.b8_stride *
297                                                  block_height * 2 + 2) *
298                                                 2 * sizeof(int16_t));
299             s->motion_val16[plane] = av_mallocz((s->m.mb_stride *
300                                                  (block_height + 2) + 1) *
301                                                 2 * sizeof(int16_t));
302             if (!s->motion_val8[plane] || !s->motion_val16[plane])
303                 return AVERROR(ENOMEM);
304         }
305
306         s->m.mb_type = s->mb_type;
307
308         // dummies, to avoid segfaults
309         s->m.current_picture.mb_mean   = (uint8_t *)s->dummy;
310         s->m.current_picture.mb_var    = (uint16_t *)s->dummy;
311         s->m.current_picture.mc_mb_var = (uint16_t *)s->dummy;
312         s->m.current_picture.mb_type = s->dummy;
313
314         s->m.current_picture.motion_val[0]   = s->motion_val8[plane] + 2;
315         s->m.p_mv_table                      = s->motion_val16[plane] +
316                                                s->m.mb_stride + 1;
317         s->m.mecc                            = s->mecc; // move
318         ff_init_me(&s->m);
319
320         s->m.me.dia_size      = s->avctx->dia_size;
321         s->m.first_slice_line = 1;
322         for (y = 0; y < block_height; y++) {
323             s->m.new_picture.f->data[0] = src - y * 16 * stride; // ugly
324             s->m.mb_y                  = y;
325
326             for (i = 0; i < 16 && i + 16 * y < height; i++) {
327                 memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],
328                        width);
329                 for (x = width; x < 16 * block_width; x++)
330                     src[i * stride + x] = src[i * stride + x - 1];
331             }
332             for (; i < 16 && i + 16 * y < 16 * block_height; i++)
333                 memcpy(&src[i * stride], &src[(i - 1) * stride],
334                        16 * block_width);
335
336             for (x = 0; x < block_width; x++) {
337                 s->m.mb_x = x;
338                 init_block_index(&s->m);
339
340                 ff_estimate_p_frame_motion(&s->m, x, y);
341             }
342             s->m.first_slice_line = 0;
343         }
344
345         ff_fix_long_p_mvs(&s->m);
346         ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code,
347                         CANDIDATE_MB_TYPE_INTER, 0);
348     }
349
350     s->m.first_slice_line = 1;
351     for (y = 0; y < block_height; y++) {
352         for (i = 0; i < 16 && i + 16 * y < height; i++) {
353             memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],
354                    width);
355             for (x = width; x < 16 * block_width; x++)
356                 src[i * stride + x] = src[i * stride + x - 1];
357         }
358         for (; i < 16 && i + 16 * y < 16 * block_height; i++)
359             memcpy(&src[i * stride], &src[(i - 1) * stride], 16 * block_width);
360
361         s->m.mb_y = y;
362         for (x = 0; x < block_width; x++) {
363             uint8_t reorder_buffer[2][6][7 * 32];
364             int count[2][6];
365             int offset       = y * 16 * stride + x * 16;
366             uint8_t *decoded = decoded_plane + offset;
367             uint8_t *ref     = ref_plane + offset;
368             int score[4]     = { 0, 0, 0, 0 }, best;
369             uint8_t *temp    = s->scratchbuf;
370
371             if (s->pb.buf_end - s->pb.buf -
372                 (put_bits_count(&s->pb) >> 3) < 3000) { // FIXME: check size
373                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
374                 return -1;
375             }
376
377             s->m.mb_x = x;
378             init_block_index(&s->m);
379
380             if (s->pict_type == AV_PICTURE_TYPE_I ||
381                 (s->m.mb_type[x + y * s->m.mb_stride] &
382                  CANDIDATE_MB_TYPE_INTRA)) {
383                 for (i = 0; i < 6; i++)
384                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i],
385                                   7 * 32);
386                 if (s->pict_type == AV_PICTURE_TYPE_P) {
387                     const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
388                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
389                     score[0] = vlc[1] * lambda;
390                 }
391                 score[0] += encode_block(s, src + 16 * x, NULL, temp, stride,
392                                          5, 64, lambda, 1);
393                 for (i = 0; i < 6; i++) {
394                     count[0][i] = put_bits_count(&s->reorder_pb[i]);
395                     flush_put_bits(&s->reorder_pb[i]);
396                 }
397             } else
398                 score[0] = INT_MAX;
399
400             best = 0;
401
402             if (s->pict_type == AV_PICTURE_TYPE_P) {
403                 const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
404                 int mx, my, pred_x, pred_y, dxy;
405                 int16_t *motion_ptr;
406
407                 motion_ptr = ff_h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
408                 if (s->m.mb_type[x + y * s->m.mb_stride] &
409                     CANDIDATE_MB_TYPE_INTER) {
410                     for (i = 0; i < 6; i++)
411                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i],
412                                       7 * 32);
413
414                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
415
416                     s->m.pb = s->reorder_pb[5];
417                     mx      = motion_ptr[0];
418                     my      = motion_ptr[1];
419                     av_assert1(mx     >= -32 && mx     <= 31);
420                     av_assert1(my     >= -32 && my     <= 31);
421                     av_assert1(pred_x >= -32 && pred_x <= 31);
422                     av_assert1(pred_y >= -32 && pred_y <= 31);
423                     ff_h263_encode_motion(&s->m.pb, mx - pred_x, 1);
424                     ff_h263_encode_motion(&s->m.pb, my - pred_y, 1);
425                     s->reorder_pb[5] = s->m.pb;
426                     score[1]        += lambda * put_bits_count(&s->reorder_pb[5]);
427
428                     dxy = (mx & 1) + 2 * (my & 1);
429
430                     s->hdsp.put_pixels_tab[0][dxy](temp + 16*stride,
431                                                    ref + (mx >> 1) +
432                                                    stride * (my >> 1),
433                                                    stride, 16);
434
435                     score[1] += encode_block(s, src + 16 * x, temp + 16*stride,
436                                              decoded, stride, 5, 64, lambda, 0);
437                     best      = score[1] <= score[0];
438
439                     vlc       = ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
440                     score[2]  = s->mecc.sse[0](NULL, src + 16 * x, ref,
441                                                stride, 16);
442                     score[2] += vlc[1] * lambda;
443                     if (score[2] < score[best] && mx == 0 && my == 0) {
444                         best = 2;
445                         s->hdsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
446                         put_bits(&s->pb, vlc[1], vlc[0]);
447                     }
448                 }
449
450                 if (best == 1) {
451                     for (i = 0; i < 6; i++) {
452                         count[1][i] = put_bits_count(&s->reorder_pb[i]);
453                         flush_put_bits(&s->reorder_pb[i]);
454                     }
455                 } else {
456                     motion_ptr[0]                      =
457                     motion_ptr[1]                      =
458                     motion_ptr[2]                      =
459                     motion_ptr[3]                      =
460                     motion_ptr[0 + 2 * s->m.b8_stride] =
461                     motion_ptr[1 + 2 * s->m.b8_stride] =
462                     motion_ptr[2 + 2 * s->m.b8_stride] =
463                     motion_ptr[3 + 2 * s->m.b8_stride] = 0;
464                 }
465             }
466
467             s->rd_total += score[best];
468
469             if (best != 2)
470             for (i = 5; i >= 0; i--)
471                 avpriv_copy_bits(&s->pb, reorder_buffer[best][i],
472                                  count[best][i]);
473             if (best == 0)
474                 s->hdsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
475         }
476         s->m.first_slice_line = 0;
477     }
478     return 0;
479 }
480
481 static av_cold int svq1_encode_end(AVCodecContext *avctx)
482 {
483     SVQ1EncContext *const s = avctx->priv_data;
484     int i;
485
486     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n",
487            s->rd_total / (double)(avctx->width * avctx->height *
488                                   avctx->frame_number));
489
490     s->m.mb_type = NULL;
491     ff_mpv_common_end(&s->m);
492
493     av_freep(&s->m.me.scratchpad);
494     av_freep(&s->m.me.map);
495     av_freep(&s->m.me.score_map);
496     av_freep(&s->mb_type);
497     av_freep(&s->dummy);
498     av_freep(&s->scratchbuf);
499
500     for (i = 0; i < 3; i++) {
501         av_freep(&s->motion_val8[i]);
502         av_freep(&s->motion_val16[i]);
503     }
504
505     av_frame_free(&s->current_picture);
506     av_frame_free(&s->last_picture);
507
508     return 0;
509 }
510
511 static av_cold int svq1_encode_init(AVCodecContext *avctx)
512 {
513     SVQ1EncContext *const s = avctx->priv_data;
514     int ret;
515
516     ff_hpeldsp_init(&s->hdsp, avctx->flags);
517     ff_me_cmp_init(&s->mecc, avctx);
518     ff_mpegvideoencdsp_init(&s->m.mpvencdsp, avctx);
519
520     s->current_picture = av_frame_alloc();
521     s->last_picture    = av_frame_alloc();
522     if (!s->current_picture || !s->last_picture) {
523         svq1_encode_end(avctx);
524         return AVERROR(ENOMEM);
525     }
526
527     s->frame_width  = avctx->width;
528     s->frame_height = avctx->height;
529
530     s->y_block_width  = (s->frame_width  + 15) / 16;
531     s->y_block_height = (s->frame_height + 15) / 16;
532
533     s->c_block_width  = (s->frame_width  / 4 + 15) / 16;
534     s->c_block_height = (s->frame_height / 4 + 15) / 16;
535
536     s->avctx               = avctx;
537     s->m.avctx             = avctx;
538
539     if ((ret = ff_mpv_common_init(&s->m)) < 0) {
540         svq1_encode_end(avctx);
541         return ret;
542     }
543
544     s->m.picture_structure = PICT_FRAME;
545     s->m.me.temp           =
546     s->m.me.scratchpad     = av_mallocz((avctx->width + 64) *
547                                         2 * 16 * 2 * sizeof(uint8_t));
548     s->m.me.map            = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));
549     s->m.me.score_map      = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));
550     s->mb_type             = av_mallocz((s->y_block_width + 1) *
551                                         s->y_block_height * sizeof(int16_t));
552     s->dummy               = av_mallocz((s->y_block_width + 1) *
553                                         s->y_block_height * sizeof(int32_t));
554     s->ssd_int8_vs_int16   = ssd_int8_vs_int16_c;
555
556     if (!s->m.me.temp || !s->m.me.scratchpad || !s->m.me.map ||
557         !s->m.me.score_map || !s->mb_type || !s->dummy) {
558         svq1_encode_end(avctx);
559         return AVERROR(ENOMEM);
560     }
561
562     if (ARCH_PPC)
563         ff_svq1enc_init_ppc(s);
564     if (ARCH_X86)
565         ff_svq1enc_init_x86(s);
566
567     ff_h263_encode_init(&s->m); // mv_penalty
568
569     return 0;
570 }
571
572 static int svq1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
573                              const AVFrame *pict, int *got_packet)
574 {
575     SVQ1EncContext *const s = avctx->priv_data;
576     int i, ret;
577
578     if ((ret = ff_alloc_packet2(avctx, pkt, s->y_block_width * s->y_block_height *
579                              MAX_MB_BYTES*3 + FF_MIN_BUFFER_SIZE, 0)) < 0)
580         return ret;
581
582     if (avctx->pix_fmt != AV_PIX_FMT_YUV410P) {
583         av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
584         return -1;
585     }
586
587     if (!s->current_picture->data[0]) {
588         if ((ret = ff_get_buffer(avctx, s->current_picture, 0)) < 0) {
589             return ret;
590         }
591     }
592     if (!s->last_picture->data[0]) {
593         ret = ff_get_buffer(avctx, s->last_picture, 0);
594         if (ret < 0)
595             return ret;
596     }
597     if (!s->scratchbuf) {
598         s->scratchbuf = av_malloc_array(s->current_picture->linesize[0], 16 * 3);
599         if (!s->scratchbuf)
600             return AVERROR(ENOMEM);
601     }
602
603     FFSWAP(AVFrame*, s->current_picture, s->last_picture);
604
605     init_put_bits(&s->pb, pkt->data, pkt->size);
606
607     if (avctx->gop_size && (avctx->frame_number % avctx->gop_size))
608         s->pict_type = AV_PICTURE_TYPE_P;
609     else
610         s->pict_type = AV_PICTURE_TYPE_I;
611     s->quality = pict->quality;
612
613 #if FF_API_CODED_FRAME
614 FF_DISABLE_DEPRECATION_WARNINGS
615     avctx->coded_frame->pict_type = s->pict_type;
616     avctx->coded_frame->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
617 FF_ENABLE_DEPRECATION_WARNINGS
618 #endif
619
620     ff_side_data_set_encoder_stats(pkt, pict->quality, NULL, 0, s->pict_type);
621
622     svq1_write_header(s, s->pict_type);
623     for (i = 0; i < 3; i++)
624         if (svq1_encode_plane(s, i,
625                               pict->data[i],
626                               s->last_picture->data[i],
627                               s->current_picture->data[i],
628                               s->frame_width  / (i ? 4 : 1),
629                               s->frame_height / (i ? 4 : 1),
630                               pict->linesize[i],
631                               s->current_picture->linesize[i]) < 0) {
632             int j;
633             for (j = 0; j < i; j++) {
634                 av_freep(&s->motion_val8[j]);
635                 av_freep(&s->motion_val16[j]);
636             }
637             av_freep(&s->scratchbuf);
638             return -1;
639         }
640
641     // avpriv_align_put_bits(&s->pb);
642     while (put_bits_count(&s->pb) & 31)
643         put_bits(&s->pb, 1, 0);
644
645     flush_put_bits(&s->pb);
646
647     pkt->size = put_bits_count(&s->pb) / 8;
648     if (s->pict_type == AV_PICTURE_TYPE_I)
649         pkt->flags |= AV_PKT_FLAG_KEY;
650     *got_packet = 1;
651
652     return 0;
653 }
654
655 AVCodec ff_svq1_encoder = {
656     .name           = "svq1",
657     .long_name      = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
658     .type           = AVMEDIA_TYPE_VIDEO,
659     .id             = AV_CODEC_ID_SVQ1,
660     .priv_data_size = sizeof(SVQ1EncContext),
661     .init           = svq1_encode_init,
662     .encode2        = svq1_encode_frame,
663     .close          = svq1_encode_end,
664     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
665                                                      AV_PIX_FMT_NONE },
666 };