2 * FLV Encoding specific code.
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "mpegvideo.h"
25 void ff_flv_encode_picture_header(MpegEncContext
*s
, int picture_number
)
29 avpriv_align_put_bits(&s
->pb
);
31 put_bits(&s
->pb
, 17, 1);
32 /* 0: h263 escape codes 1: 11-bit escape codes */
33 put_bits(&s
->pb
, 5, (s
->h263_flv
- 1));
35 (((int64_t) s
->picture_number
* 30 * s
->avctx
->time_base
.num
) / // FIXME use timestamp
36 s
->avctx
->time_base
.den
) & 0xff); /* TemporalReference */
37 if (s
->width
== 352 && s
->height
== 288)
39 else if (s
->width
== 176 && s
->height
== 144)
41 else if (s
->width
== 128 && s
->height
== 96)
43 else if (s
->width
== 320 && s
->height
== 240)
45 else if (s
->width
== 160 && s
->height
== 120)
47 else if (s
->width
<= 255 && s
->height
<= 255)
48 format
= 0; /* use 1 byte width & height */
50 format
= 1; /* use 2 bytes width & height */
51 put_bits(&s
->pb
, 3, format
); /* PictureSize */
53 put_bits(&s
->pb
, 8, s
->width
);
54 put_bits(&s
->pb
, 8, s
->height
);
55 } else if (format
== 1) {
56 put_bits(&s
->pb
, 16, s
->width
);
57 put_bits(&s
->pb
, 16, s
->height
);
59 put_bits(&s
->pb
, 2, s
->pict_type
== AV_PICTURE_TYPE_P
); /* PictureType */
60 put_bits(&s
->pb
, 1, 1); /* DeblockingFlag: on */
61 put_bits(&s
->pb
, 5, s
->qscale
); /* Quantizer */
62 put_bits(&s
->pb
, 1, 0); /* ExtraInformation */
66 s
->c_dc_scale_table
= ff_aic_dc_scale_table
;
69 s
->c_dc_scale_table
= ff_mpeg1_dc_scale_table
;
73 void ff_flv2_encode_ac_esc(PutBitContext
*pb
, int slevel
, int level
,
76 if (level
< 64) { // 7-bit level
78 put_bits(pb
, 1, last
);
81 put_sbits(pb
, 7, slevel
);
85 put_bits(pb
, 1, last
);
88 put_sbits(pb
, 11, slevel
);
92 FF_MPV_GENERIC_CLASS(flv
)
94 AVCodec ff_flv_encoder
= {
96 .long_name
= NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
97 .type
= AVMEDIA_TYPE_VIDEO
,
98 .id
= AV_CODEC_ID_FLV1
,
99 .priv_data_size
= sizeof(MpegEncContext
),
100 .init
= ff_mpv_encode_init
,
101 .encode2
= ff_mpv_encode_picture
,
102 .close
= ff_mpv_encode_end
,
103 .pix_fmts
= (const enum AVPixelFormat
[]) { AV_PIX_FMT_YUV420P
,
105 .priv_class
= &flv_class
,