libavcodec/rv10enc.c

   1 /*
   2  * RV10 encoder
   3  * Copyright (c) 2000,2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; 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  * RV10 encoder
  26  */
  27
  28 #include "mpegvideo.h"
  29 #include "put_bits.h"
  30 #include "rv10.h"
  31
  32 int ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number)
  33 {
  34     int full_frame= 0;
  35
  36     avpriv_align_put_bits(&s->pb);
  37
  38     put_bits(&s->pb, 1, 1);     /* marker */
  39
  40     put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P));
  41
  42     put_bits(&s->pb, 1, 0);     /* not PB-mframe */
  43
  44     put_bits(&s->pb, 5, s->qscale);
  45
  46     if (s->pict_type == AV_PICTURE_TYPE_I) {
  47         /* specific MPEG like DC coding not used */
  48     }
  49     /* if multiple packets per frame are sent, the position at which
  50        to display the macroblocks is coded here */
  51     if(!full_frame){
  52         if (s->mb_width * s->mb_height >= (1U << 12)) {
  53             avpriv_report_missing_feature(s->avctx, "Encoding frames with %d (>= 4096) macroblocks",
  54                                           s->mb_width * s->mb_height);
  55             return AVERROR(ENOSYS);
  56         }
  57         put_bits(&s->pb, 6, 0); /* mb_x */
  58         put_bits(&s->pb, 6, 0); /* mb_y */
  59         put_bits(&s->pb, 12, s->mb_width * s->mb_height);
  60     }
  61
  62     put_bits(&s->pb, 3, 0);     /* ignored */
  63     return 0;
  64 }
  65
  66 static const AVClass rv10_class = {
  67     .class_name = "rv10 encoder",
  68     .item_name  = av_default_item_name,
  69     .option     = ff_mpv_generic_options,
  70     .version    = LIBAVUTIL_VERSION_INT,
  71 };
  72
  73 AVCodec ff_rv10_encoder = {
  74     .name           = "rv10",
  75     .long_name      = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
  76     .type           = AVMEDIA_TYPE_VIDEO,
  77     .id             = AV_CODEC_ID_RV10,
  78     .priv_data_size = sizeof(MpegEncContext),
  79     .init           = ff_mpv_encode_init,
  80     .encode2        = ff_mpv_encode_picture,
  81     .close          = ff_mpv_encode_end,
  82     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
  83     .priv_class     = &rv10_class,
  84 };