2 * FLV Encoding specific code.
3 * This file is part of Libav.
5 * Libav is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * Libav is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with Libav; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "mpegvideo.h"
24 void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number)
28 avpriv_align_put_bits(&s->pb);
30 put_bits(&s->pb, 17, 1);
31 put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */
32 put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->time_base.num) / //FIXME use timestamp
33 s->avctx->time_base.den) & 0xff); /* TemporalReference */
34 if (s->width == 352 && s->height == 288)
36 else if (s->width == 176 && s->height == 144)
38 else if (s->width == 128 && s->height == 96)
40 else if (s->width == 320 && s->height == 240)
42 else if (s->width == 160 && s->height == 120)
44 else if (s->width <= 255 && s->height <= 255)
45 format = 0; /* use 1 byte width & height */
47 format = 1; /* use 2 bytes width & height */
48 put_bits(&s->pb, 3, format); /* PictureSize */
50 put_bits(&s->pb, 8, s->width);
51 put_bits(&s->pb, 8, s->height);
52 } else if (format == 1) {
53 put_bits(&s->pb, 16, s->width);
54 put_bits(&s->pb, 16, s->height);
56 put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */
57 put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
58 put_bits(&s->pb, 5, s->qscale); /* Quantizer */
59 put_bits(&s->pb, 1, 0); /* ExtraInformation */
63 s->c_dc_scale_table= ff_aic_dc_scale_table;
66 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
70 void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level, int run, int last){
71 if(level < 64) { // 7-bit level
73 put_bits(pb, 1, last);
76 put_sbits(pb, 7, slevel);
80 put_bits(pb, 1, last);
83 put_sbits(pb, 11, slevel);
87 FF_MPV_GENERIC_CLASS(flv)
89 AVCodec ff_flv_encoder = {
91 .type = AVMEDIA_TYPE_VIDEO,
93 .priv_data_size = sizeof(MpegEncContext),
94 .init = ff_MPV_encode_init,
95 .encode2 = ff_MPV_encode_picture,
96 .close = ff_MPV_encode_end,
97 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
98 .long_name = NULL_IF_CONFIG_SMALL("Flash Video (FLV) / Sorenson Spark / Sorenson H.263"),
99 .priv_class = &flv_class,