/*
  * SVQ1 Encoder
  * Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**

  * @file

  * Sorenson Vector Quantizer #1 (SVQ1) video codec.
  * For more information of the SVQ1 algorithm, visit:
  *   http://www.pcisys.net/~melanson/codecs/
  */
 
 #include "avcodec.h"

 #include "hpeldsp.h"

 #include "me_cmp.h"

 #include "mpegvideo.h"

 #include "h263.h"

 #include "internal.h"

 #include "mpegutils.h"

 #include "svq1.h"

 #include "svq1enc.h"

 #include "svq1enc_cb.h"

 #include "libavutil/avassert.h"

 static void svq1_write_header(SVQ1EncContext *s, int frame_type)

 {
     int i;
 
     /* frame code */
     put_bits(&s->pb, 22, 0x20);
 
     /* temporal reference (sure hope this is a "don't care") */
     put_bits(&s->pb, 8, 0x00);
 
     /* frame type */
     put_bits(&s->pb, 2, frame_type - 1);
 

     if (frame_type == AV_PICTURE_TYPE_I) {

         /* no checksum since frame code is 0x20 */
         /* no embedded string either */
         /* output 5 unknown bits (2 + 2 + 1) */
         put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
 

         i = ff_match_2uint16((void*)ff_svq1_frame_size_table,

                              FF_ARRAY_ELEMS(ff_svq1_frame_size_table),
                              s->frame_width, s->frame_height);

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

         if (i == 7) {
             put_bits(&s->pb, 12, s->frame_width);
             put_bits(&s->pb, 12, s->frame_height);

         }
     }
 
     /* no checksum or extra data (next 2 bits get 0) */
     put_bits(&s->pb, 2, 0);
 }
 

 #define QUALITY_THRESHOLD    100

 #define THRESHOLD_MULTIPLIER 0.6
 

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

                                intptr_t size)

 {
     int score = 0, i;
 
     for (i = 0; i < size; i++)
         score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
     return score;
 }
 

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

                         uint8_t *decoded, int stride, int level,
                         int threshold, int lambda, int intra)
 {

     int count, y, x, i, j, split, best_mean, best_score, best_count;
     int best_vector[6];

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

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

     int size         = w * h;

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

     const int8_t *codebook_sum, *codebook;

     const uint16_t(*mean_vlc)[2];
     const uint8_t(*multistage_vlc)[2];
 
     best_score = 0;
     // FIXME: Optimize, this does not need to be done multiple times.
     if (intra) {

         // level is 5 when encode_block is called from svq1_encode_plane
         // and always < 4 when called recursively from this function.
         codebook_sum   = level < 4 ? svq1_intra_codebook_sum[level] : NULL;

         codebook       = ff_svq1_intra_codebooks[level];
         mean_vlc       = ff_svq1_intra_mean_vlc;
         multistage_vlc = ff_svq1_intra_multistage_vlc[level];
         for (y = 0; y < h; y++) {
             for (x = 0; x < w; x++) {
                 int v = src[x + y * stride];
                 block[0][x + w * y] = v;
                 best_score         += v * v;
                 block_sum[0]       += v;

             }
         }

     } else {

         // level is 5 or < 4, see above for details.
         codebook_sum   = level < 4 ? svq1_inter_codebook_sum[level] : NULL;

         codebook       = ff_svq1_inter_codebooks[level];
         mean_vlc       = ff_svq1_inter_mean_vlc + 256;
         multistage_vlc = ff_svq1_inter_multistage_vlc[level];
         for (y = 0; y < h; y++) {
             for (x = 0; x < w; x++) {
                 int v = src[x + y * stride] - ref[x + y * stride];
                 block[0][x + w * y] = v;
                 best_score         += v * v;
                 block_sum[0]       += v;

             }
         }
     }
 

     best_count  = 0;

     best_score -= (int)((unsigned)block_sum[0] * block_sum[0] >> (level + 3));
     best_mean   = block_sum[0] + (size >> 1) >> (level + 3);

     if (level < 4) {
         for (count = 1; count < 7; count++) {
             int best_vector_score = INT_MAX;
             int best_vector_sum   = -999, best_vector_mean = -999;
             const int stage       = count - 1;

             const int8_t *vector;
 

             for (i = 0; i < 16; i++) {
                 int sum = codebook_sum[stage * 16 + i];

                 int sqr, diff, score;
 

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

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

                 diff   = block_sum[stage] - sum;

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

                 if (score < best_vector_score) {

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

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

                     mean               = av_clip(mean, intra ? 0 : -256, 255);
                     best_vector_score  = score;
                     best_vector[stage] = i;
                     best_vector_sum    = sum;
                     best_vector_mean   = mean;

                 }
             }

             av_assert0(best_vector_mean != -999);

             vector = codebook + stage * size * 16 + best_vector[stage] * size;
             for (j = 0; j < size; j++)
                 block[stage + 1][j] = block[stage][j] - vector[j];
             block_sum[stage + 1] = block_sum[stage] - best_vector_sum;
             best_vector_score   += lambda *
                                    (+1 + 4 * count +
                                     multistage_vlc[1 + count][1]
                                     + mean_vlc[best_vector_mean][1]);
 
             if (best_vector_score < best_score) {
                 best_score = best_vector_score;
                 best_count = count;
                 best_mean  = best_vector_mean;

             }
         }
     }
 

     split = 0;
     if (best_score > threshold && level) {
         int score  = 0;

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

         PutBitContext backup[6];
 

         for (i = level - 1; i >= 0; i--)
             backup[i] = s->reorder_pb[i];
         score += encode_block(s, src, ref, decoded, stride, level - 1,
                               threshold >> 1, lambda, intra);
         score += encode_block(s, src + offset, ref + offset, decoded + offset,
                               stride, level - 1, threshold >> 1, lambda, intra);

         score += lambda;
 

         if (score < best_score) {
             best_score = score;
             split      = 1;
         } else {
             for (i = level - 1; i >= 0; i--)
                 s->reorder_pb[i] = backup[i];

         }
     }
     if (level > 0)
         put_bits(&s->reorder_pb[level], 1, split);
 

     if (!split) {

         av_assert1(best_mean >= 0 && best_mean < 256 || !intra);
         av_assert1(best_mean >= -256 && best_mean < 256);
         av_assert1(best_count >= 0 && best_count < 7);
         av_assert1(level < 4 || best_count == 0);

 
         /* output the encoding */
         put_bits(&s->reorder_pb[level],

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

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

                  mean_vlc[best_mean][0]);

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

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

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

         for (y = 0; y < h; y++)
             for (x = 0; x < w; x++)
                 decoded[x + y * stride] = src[x + y * stride] -
                                           block[best_count][x + w * y] +
                                           best_mean;

     }
 
     return best_score;
 }
 

 static void init_block_index(MpegEncContext *s){
     s->block_index[0]= s->b8_stride*(s->mb_y*2    )     + s->mb_x*2;
     s->block_index[1]= s->b8_stride*(s->mb_y*2    ) + 1 + s->mb_x*2;
     s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1)     + s->mb_x*2;
     s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) + 1 + s->mb_x*2;
     s->block_index[4]= s->mb_stride*(s->mb_y + 1)                + s->b8_stride*s->mb_height*2 + s->mb_x;
     s->block_index[5]= s->mb_stride*(s->mb_y + s->mb_height + 2) + s->b8_stride*s->mb_height*2 + s->mb_x;
 }
 

 static int svq1_encode_plane(SVQ1EncContext *s, int plane,

                              unsigned char *src_plane,
                              unsigned char *ref_plane,
                              unsigned char *decoded_plane,
                              int width, int height, int src_stride, int stride)

 {
     int x, y;
     int i;
     int block_width, block_height;
     int level;
     int threshold[6];

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

     const int lambda = (s->quality * s->quality) >>

                        (2 * FF_LAMBDA_SHIFT);

 
     /* figure out the acceptable level thresholds in advance */
     threshold[5] = QUALITY_THRESHOLD;
     for (level = 4; level >= 0; level--)
         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
 

     block_width  = (width  + 15) / 16;

     block_height = (height + 15) / 16;
 

     if (s->pict_type == AV_PICTURE_TYPE_P) {

         s->m.avctx                         = s->avctx;
         s->m.current_picture_ptr           = &s->m.current_picture;
         s->m.last_picture_ptr              = &s->m.last_picture;

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

         s->m.linesize                      =

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

         s->m.width                         = width;
         s->m.height                        = height;
         s->m.mb_width                      = block_width;
         s->m.mb_height                     = block_height;
         s->m.mb_stride                     = s->m.mb_width + 1;
         s->m.b8_stride                     = 2 * s->m.mb_width + 1;
         s->m.f_code                        = 1;

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

         s->m.motion_est                    = s->motion_est;

         s->m.me.scene_change_score         = 0;
         // s->m.out_format                    = FMT_H263;
         // s->m.unrestricted_mv               = 1;

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

         s->m.qscale                        = s->m.lambda * 139 +
                                              FF_LAMBDA_SCALE * 64 >>
                                              FF_LAMBDA_SHIFT + 7;
         s->m.lambda2                       = s->m.lambda * s->m.lambda +
                                              FF_LAMBDA_SCALE / 2 >>

                                              FF_LAMBDA_SHIFT;
 
         if (!s->motion_val8[plane]) {
             s->motion_val8[plane]  = av_mallocz((s->m.b8_stride *
                                                  block_height * 2 + 2) *
                                                 2 * sizeof(int16_t));
             s->motion_val16[plane] = av_mallocz((s->m.mb_stride *
                                                  (block_height + 2) + 1) *
                                                 2 * sizeof(int16_t));

             if (!s->motion_val8[plane] || !s->motion_val16[plane])
                 return AVERROR(ENOMEM);

         }
 

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

         // dummies, to avoid segfaults
         s->m.current_picture.mb_mean   = (uint8_t *)s->dummy;
         s->m.current_picture.mb_var    = (uint16_t *)s->dummy;
         s->m.current_picture.mc_mb_var = (uint16_t *)s->dummy;

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

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

         s->m.p_mv_table                      = s->motion_val16[plane] +
                                                s->m.mb_stride + 1;

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

         ff_init_me(&s->m);
 

         s->m.me.dia_size      = s->avctx->dia_size;
         s->m.first_slice_line = 1;

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

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

             s->m.mb_y                  = y;
 
             for (i = 0; i < 16 && i + 16 * y < height; i++) {
                 memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],
                        width);
                 for (x = width; x < 16 * block_width; x++)
                     src[i * stride + x] = src[i * stride + x - 1];

             }

             for (; i < 16 && i + 16 * y < 16 * block_height; i++)
                 memcpy(&src[i * stride], &src[(i - 1) * stride],
                        16 * block_width);

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

                 s->m.mb_x = x;

                 init_block_index(&s->m);

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

             s->m.first_slice_line = 0;

         }
 
         ff_fix_long_p_mvs(&s->m);

         ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code,
                         CANDIDATE_MB_TYPE_INTER, 0);

     }
 

     s->m.first_slice_line = 1;

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

         for (i = 0; i < 16 && i + 16 * y < height; i++) {
             memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],
                    width);
             for (x = width; x < 16 * block_width; x++)
                 src[i * stride + x] = src[i * stride + x - 1];

         }

         for (; i < 16 && i + 16 * y < 16 * block_height; i++)
             memcpy(&src[i * stride], &src[(i - 1) * stride], 16 * block_width);

         s->m.mb_y = y;

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

             uint8_t reorder_buffer[2][6][7 * 32];
             int count[2][6];

             int offset       = y * 16 * stride + x * 16;
             uint8_t *decoded = decoded_plane + offset;
             uint8_t *ref     = ref_plane + offset;
             int score[4]     = { 0, 0, 0, 0 }, best;
             uint8_t *temp    = s->scratchbuf;
 
             if (s->pb.buf_end - s->pb.buf -
                 (put_bits_count(&s->pb) >> 3) < 3000) { // FIXME: check size

                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
                 return -1;
             }
 

             s->m.mb_x = x;

             init_block_index(&s->m);

             if (s->pict_type == AV_PICTURE_TYPE_I ||

                 (s->m.mb_type[x + y * s->m.mb_stride] &
                  CANDIDATE_MB_TYPE_INTRA)) {
                 for (i = 0; i < 6; i++)
                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i],
                                   7 * 32);

                 if (s->pict_type == AV_PICTURE_TYPE_P) {

                     const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];

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

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

                 }

                 score[0] += encode_block(s, src + 16 * x, NULL, temp, stride,
                                          5, 64, lambda, 1);
                 for (i = 0; i < 6; i++) {
                     count[0][i] = put_bits_count(&s->reorder_pb[i]);

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

             } else
                 score[0] = INT_MAX;

             best = 0;

             if (s->pict_type == AV_PICTURE_TYPE_P) {

                 const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];

                 int mx, my, pred_x, pred_y, dxy;
                 int16_t *motion_ptr;
 

                 motion_ptr = ff_h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
                 if (s->m.mb_type[x + y * s->m.mb_stride] &
                     CANDIDATE_MB_TYPE_INTER) {
                     for (i = 0; i < 6; i++)
                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i],
                                       7 * 32);

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

                     s->m.pb = s->reorder_pb[5];
                     mx      = motion_ptr[0];
                     my      = motion_ptr[1];

                     av_assert1(mx     >= -32 && mx     <= 31);
                     av_assert1(my     >= -32 && my     <= 31);
                     av_assert1(pred_x >= -32 && pred_x <= 31);
                     av_assert1(pred_y >= -32 && pred_y <= 31);

                     ff_h263_encode_motion(&s->m.pb, mx - pred_x, 1);
                     ff_h263_encode_motion(&s->m.pb, my - pred_y, 1);

                     s->reorder_pb[5] = s->m.pb;
                     score[1]        += lambda * put_bits_count(&s->reorder_pb[5]);
 
                     dxy = (mx & 1) + 2 * (my & 1);
 

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

                                                    ref + (mx >> 1) +
                                                    stride * (my >> 1),
                                                    stride, 16);

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

                                              decoded, stride, 5, 64, lambda, 0);
                     best      = score[1] <= score[0];
 
                     vlc       = ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];

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

                     score[2] += vlc[1] * lambda;
                     if (score[2] < score[best] && mx == 0 && my == 0) {
                         best = 2;

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

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

                 if (best == 1) {
                     for (i = 0; i < 6; i++) {
                         count[1][i] = put_bits_count(&s->reorder_pb[i]);

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

                 } else {
                     motion_ptr[0]                      =
                     motion_ptr[1]                      =
                     motion_ptr[2]                      =
                     motion_ptr[3]                      =
                     motion_ptr[0 + 2 * s->m.b8_stride] =
                     motion_ptr[1 + 2 * s->m.b8_stride] =
                     motion_ptr[2 + 2 * s->m.b8_stride] =
                     motion_ptr[3 + 2 * s->m.b8_stride] = 0;

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

             if (best != 2)

             for (i = 5; i >= 0; i--)
                 avpriv_copy_bits(&s->pb, reorder_buffer[best][i],
                                  count[best][i]);
             if (best == 0)

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

         }

         s->m.first_slice_line = 0;

     }
     return 0;
 }
 

 static av_cold int svq1_encode_end(AVCodecContext *avctx)
 {

     SVQ1EncContext *const s = avctx->priv_data;

     int i;
 
     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n",
            s->rd_total / (double)(avctx->width * avctx->height *
                                   avctx->frame_number));
 

     s->m.mb_type = NULL;

     ff_mpv_common_end(&s->m);

     av_freep(&s->m.me.scratchpad);
     av_freep(&s->m.me.map);
     av_freep(&s->m.me.score_map);
     av_freep(&s->mb_type);
     av_freep(&s->dummy);
     av_freep(&s->scratchbuf);
 
     for (i = 0; i < 3; i++) {
         av_freep(&s->motion_val8[i]);
         av_freep(&s->motion_val16[i]);
     }
 
     av_frame_free(&s->current_picture);
     av_frame_free(&s->last_picture);
 
     return 0;
 }
 

 static av_cold int svq1_encode_init(AVCodecContext *avctx)

 {

     SVQ1EncContext *const s = avctx->priv_data;

     int ret;

     if (avctx->width >= 4096 || avctx->height >= 4096) {
         av_log(avctx, AV_LOG_ERROR, "Dimensions too large, maximum is 4095x4095\n");
         return AVERROR(EINVAL);
     }
 

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

     ff_me_cmp_init(&s->mecc, avctx);

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

 
     s->current_picture = av_frame_alloc();
     s->last_picture    = av_frame_alloc();

     if (!s->current_picture || !s->last_picture) {

         svq1_encode_end(avctx);
         return AVERROR(ENOMEM);
     }

     s->frame_width  = avctx->width;

     s->frame_height = avctx->height;
 

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

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

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

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

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

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

         svq1_encode_end(avctx);
         return ret;
     }
 

     s->m.picture_structure = PICT_FRAME;

     s->m.me.temp           =
     s->m.me.scratchpad     = av_mallocz((avctx->width + 64) *
                                         2 * 16 * 2 * sizeof(uint8_t));
     s->m.me.map            = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));
     s->m.me.score_map      = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));
     s->mb_type             = av_mallocz((s->y_block_width + 1) *
                                         s->y_block_height * sizeof(int16_t));
     s->dummy               = av_mallocz((s->y_block_width + 1) *
                                         s->y_block_height * sizeof(int32_t));

     s->ssd_int8_vs_int16   = ssd_int8_vs_int16_c;
 

     if (!s->m.me.temp || !s->m.me.scratchpad || !s->m.me.map ||
         !s->m.me.score_map || !s->mb_type || !s->dummy) {

         svq1_encode_end(avctx);
         return AVERROR(ENOMEM);
     }
 

     if (ARCH_PPC)
         ff_svq1enc_init_ppc(s);
     if (ARCH_X86)
         ff_svq1enc_init_x86(s);
 

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

 
     return 0;
 }
 

 static int svq1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                              const AVFrame *pict, int *got_packet)

 {

     SVQ1EncContext *const s = avctx->priv_data;

     int i, ret;
 

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

                              MAX_MB_BYTES*3 + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)

         return ret;

     if (avctx->pix_fmt != AV_PIX_FMT_YUV410P) {

         av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
         return -1;
     }
 

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

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

             return ret;
         }

     }

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

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

             return ret;
     }
     if (!s->scratchbuf) {
         s->scratchbuf = av_malloc_array(s->current_picture->linesize[0], 16 * 3);
         if (!s->scratchbuf)
             return AVERROR(ENOMEM);
     }

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

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

     if (avctx->gop_size && (avctx->frame_number % avctx->gop_size))
         s->pict_type = AV_PICTURE_TYPE_P;
     else
         s->pict_type = AV_PICTURE_TYPE_I;
     s->quality = pict->quality;

 #if FF_API_CODED_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS

     avctx->coded_frame->pict_type = s->pict_type;
     avctx->coded_frame->key_frame = s->pict_type == AV_PICTURE_TYPE_I;

 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

     ff_side_data_set_encoder_stats(pkt, pict->quality, NULL, 0, s->pict_type);

     svq1_write_header(s, s->pict_type);

     for (i = 0; i < 3; i++) {
         int ret = svq1_encode_plane(s, i,

                               pict->data[i],
                               s->last_picture->data[i],
                               s->current_picture->data[i],

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

                               pict->linesize[i],

                               s->current_picture->linesize[i]);
         emms_c();
         if (ret < 0) {

             int j;
             for (j = 0; j < i; j++) {
                 av_freep(&s->motion_val8[j]);
                 av_freep(&s->motion_val16[j]);
             }
             av_freep(&s->scratchbuf);

             return -1;

         }

     }

 
     // avpriv_align_put_bits(&s->pb);
     while (put_bits_count(&s->pb) & 31)

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

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

     if (s->pict_type == AV_PICTURE_TYPE_I)

         pkt->flags |= AV_PKT_FLAG_KEY;
     *got_packet = 1;
 
     return 0;

 }
 

 #define OFFSET(x) offsetof(struct SVQ1EncContext, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
     { "motion-est", "Motion estimation algorithm", OFFSET(motion_est), AV_OPT_TYPE_INT, { .i64 = FF_ME_EPZS }, FF_ME_ZERO, FF_ME_XONE, VE, "motion-est"},
         { "zero", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ZERO }, 0, 0, FF_MPV_OPT_FLAGS, "motion-est" },
         { "epzs", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_EPZS }, 0, 0, FF_MPV_OPT_FLAGS, "motion-est" },
         { "xone", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_XONE }, 0, 0, FF_MPV_OPT_FLAGS, "motion-est" },
 
     { NULL },
 };
 
 static const AVClass svq1enc_class = {
     .class_name = "svq1enc",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
 };
 

 AVCodec ff_svq1_encoder = {

     .name           = "svq1",

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

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_SVQ1,

     .priv_data_size = sizeof(SVQ1EncContext),

     .priv_class     = &svq1enc_class,

     .init           = svq1_encode_init,

     .encode2        = svq1_encode_frame,

     .close          = svq1_encode_end,

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

 };