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"
24 #include "mpegvideodata.h"
26 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number)
30 avpriv_align_put_bits(&s->pb);
32 put_bits(&s->pb, 17, 1);
33 /* 0: h263 escape codes 1: 11-bit escape codes */
34 put_bits(&s->pb, 5, (s->h263_flv - 1));
36 (((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp
37 s->avctx->time_base.den) & 0xff); /* TemporalReference */
38 if (s->width == 352 && s->height == 288)
40 else if (s->width == 176 && s->height == 144)
42 else if (s->width == 128 && s->height == 96)
44 else if (s->width == 320 && s->height == 240)
46 else if (s->width == 160 && s->height == 120)
48 else if (s->width <= 255 && s->height <= 255)
49 format = 0; /* use 1 byte width & height */
51 format = 1; /* use 2 bytes width & height */
52 put_bits(&s->pb, 3, format); /* PictureSize */
54 put_bits(&s->pb, 8, s->width);
55 put_bits(&s->pb, 8, s->height);
56 } else if (format == 1) {
57 put_bits(&s->pb, 16, s->width);
58 put_bits(&s->pb, 16, s->height);
60 put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */
61 put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
62 put_bits(&s->pb, 5, s->qscale); /* Quantizer */
63 put_bits(&s->pb, 1, 0); /* ExtraInformation */
67 s->c_dc_scale_table = ff_aic_dc_scale_table;
70 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
74 void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level,
77 if (level < 64) { // 7-bit level
79 put_bits(pb, 1, last);
82 put_sbits(pb, 7, slevel);
86 put_bits(pb, 1, last);
89 put_sbits(pb, 11, slevel);
93 FF_MPV_GENERIC_CLASS(flv)
95 AVCodec ff_flv_encoder = {
97 .long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
98 .type = AVMEDIA_TYPE_VIDEO,
99 .id = AV_CODEC_ID_FLV1,
100 .priv_data_size = sizeof(MpegEncContext),
101 .init = ff_mpv_encode_init,
102 .encode2 = ff_mpv_encode_picture,
103 .close = ff_mpv_encode_end,
104 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
106 .priv_class = &flv_class,