libavcodec/rv20enc.c

   1 /*
   2  * RV20 encoder
   3  * Copyright (c) 2000,2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * RV20 encoder
  26  */
  27
  28 #include "codec_internal.h"
  29 #include "mpegvideo.h"
  30 #include "mpegvideodata.h"
  31 #include "mpegvideoenc.h"
  32 #include "h263data.h"
  33 #include "h263enc.h"
  34 #include "put_bits.h"
  35 #include "rv10enc.h"
  36
  37 void ff_rv20_encode_picture_header(MpegEncContext *s) {
  38     put_bits(&s->pb, 2, s->pict_type); //I 0 vs. 1 ?
  39     put_bits(&s->pb, 1, 0);     /* unknown bit */
  40     put_bits(&s->pb, 5, s->qscale);
  41
  42     put_sbits(&s->pb, 8, s->picture_number); //FIXME wrong, but correct is not known
  43     s->mb_x= s->mb_y= 0;
  44     ff_h263_encode_mba(s);
  45
  46     put_bits(&s->pb, 1, s->no_rounding);
  47
  48     av_assert0(s->f_code == 1);
  49     av_assert0(s->unrestricted_mv == 0);
  50     av_assert0(s->alt_inter_vlc == 0);
  51     av_assert0(s->umvplus == 0);
  52     av_assert0(s->modified_quant==1);
  53     av_assert0(s->loop_filter==1);
  54
  55     s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
  56     if(s->h263_aic){
  57         s->y_dc_scale_table=
  58         s->c_dc_scale_table= ff_aic_dc_scale_table;
  59     }else{
  60         s->y_dc_scale_table=
  61         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
  62     }
  63 }
  64
  65 const FFCodec ff_rv20_encoder = {
  66     .p.name         = "rv20",
  67     CODEC_LONG_NAME("RealVideo 2.0"),
  68     .p.type         = AVMEDIA_TYPE_VIDEO,
  69     .p.id           = AV_CODEC_ID_RV20,
  70     .p.priv_class   = &ff_mpv_enc_class,
  71     .p.capabilities = AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
  72     .priv_data_size = sizeof(MpegEncContext),
  73     .init           = ff_mpv_encode_init,
  74     FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
  75     .close          = ff_mpv_encode_end,
  76     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
  77     .p.pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
  78     .color_ranges   = AVCOL_RANGE_MPEG,
  79 };