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 "codec_internal.h"
29 #include "mpegvideo.h"
30 #include "mpegvideoenc.h"
31 #include "put_bits.h"
32 #include "rv10enc.h"
33
ff_rv10_encode_picture_header(MpegEncContext * s,int picture_number)34 int ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number)
35 {
36 int full_frame= 0;
37
38 align_put_bits(&s->pb);
39
40 put_bits(&s->pb, 1, 1); /* marker */
41
42 put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P));
43
44 put_bits(&s->pb, 1, 0); /* not PB-mframe */
45
46 put_bits(&s->pb, 5, s->qscale);
47
48 if (s->pict_type == AV_PICTURE_TYPE_I) {
49 /* specific MPEG like DC coding not used */
50 }
51 /* if multiple packets per frame are sent, the position at which
52 to display the macroblocks is coded here */
53 if(!full_frame){
54 if (s->mb_width * s->mb_height >= (1U << 12)) {
55 avpriv_report_missing_feature(s->avctx, "Encoding frames with %d (>= 4096) macroblocks",
56 s->mb_width * s->mb_height);
57 return AVERROR(ENOSYS);
58 }
59 put_bits(&s->pb, 6, 0); /* mb_x */
60 put_bits(&s->pb, 6, 0); /* mb_y */
61 put_bits(&s->pb, 12, s->mb_width * s->mb_height);
62 }
63
64 put_bits(&s->pb, 3, 0); /* ignored */
65 return 0;
66 }
67
68 const FFCodec ff_rv10_encoder = {
69 .p.name = "rv10",
70 .p.long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
71 .p.type = AVMEDIA_TYPE_VIDEO,
72 .p.id = AV_CODEC_ID_RV10,
73 .p.priv_class = &ff_mpv_enc_class,
74 .priv_data_size = sizeof(MpegEncContext),
75 .init = ff_mpv_encode_init,
76 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
77 .close = ff_mpv_encode_end,
78 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
79 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
80 };
81