/*
  * FLV Encoding specific code.

  *

  * 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
  */
 
 #include "flv.h"

 #include "h263.h"

 #include "h263data.h"

 #include "mpegvideo.h"

 #include "mpegvideodata.h"

 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number)

 {

     int format;

     avpriv_align_put_bits(&s->pb);

     put_bits(&s->pb, 17, 1);

     /* 0: H.263 escape codes 1: 11-bit escape codes */

     put_bits(&s->pb, 5, (s->h263_flv - 1));
     put_bits(&s->pb, 8,
              (((int64_t) s->picture_number * 30 * s->avctx->time_base.num) /   // FIXME use timestamp
               s->avctx->time_base.den) & 0xff);   /* TemporalReference */
     if (s->width == 352 && s->height == 288)

         format = 2;

     else if (s->width == 176 && s->height == 144)

         format = 3;

     else if (s->width == 128 && s->height == 96)

         format = 4;

     else if (s->width == 320 && s->height == 240)

         format = 5;

     else if (s->width == 160 && s->height == 120)

         format = 6;

     else if (s->width <= 255 && s->height <= 255)
         format = 0;   /* use 1 byte width & height */
     else
         format = 1;   /* use 2 bytes width & height */
     put_bits(&s->pb, 3, format);   /* PictureSize */
     if (format == 0) {

         put_bits(&s->pb, 8, s->width);
         put_bits(&s->pb, 8, s->height);

     } else if (format == 1) {

         put_bits(&s->pb, 16, s->width);
         put_bits(&s->pb, 16, s->height);

     }
     put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P);   /* PictureType */
     put_bits(&s->pb, 1, 1);   /* DeblockingFlag: on */
     put_bits(&s->pb, 5, s->qscale);   /* Quantizer */
     put_bits(&s->pb, 1, 0);   /* ExtraInformation */

     if (s->h263_aic) {
         s->y_dc_scale_table =
         s->c_dc_scale_table = ff_aic_dc_scale_table;
     } else {
         s->y_dc_scale_table =
         s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
     }

 }
 

 void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level,
                            int run, int last)
 {
     if (level < 64) { // 7-bit level

         put_bits(pb, 1, 0);
         put_bits(pb, 1, last);
         put_bits(pb, 6, run);
 
         put_sbits(pb, 7, slevel);
     } else {
         /* 11-bit level */
         put_bits(pb, 1, 1);
         put_bits(pb, 1, last);
         put_bits(pb, 6, run);
 
         put_sbits(pb, 11, slevel);
     }
 }

 static const AVClass flv_class = {
     .class_name = "flv encoder",
     .item_name  = av_default_item_name,
     .option     = ff_mpv_generic_options,
     .version    = LIBAVUTIL_VERSION_INT,
 };

 AVCodec ff_flv_encoder = {

     .name           = "flv",

     .long_name      = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_FLV1,

     .priv_data_size = sizeof(MpegEncContext),

     .init           = ff_mpv_encode_init,
     .encode2        = ff_mpv_encode_picture,
     .close          = ff_mpv_encode_end,

     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
                                                      AV_PIX_FMT_NONE},

     .priv_class     = &flv_class,

 };