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/libavcodec/rv10enc.c

http://github.com/FFmpeg/FFmpeg
C | 84 lines | 44 code | 12 blank | 28 comment | 5 complexity | 4badf78decc29424b5f834105ed6e80d MD5 | raw file
 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 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 * RV10 encoder
26 */
27
28#include "mpegvideo.h"
29#include "put_bits.h"
30#include "rv10.h"
31
32int 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
66static 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
73AVCodec 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};