1/*
2 * FLV Encoding specific code.
3 * This file is part of FFmpeg.
4 *
5 * FFmpeg 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.
9 *
10 * FFmpeg 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.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with FFmpeg; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20#include "mpegvideo.h"
21#include "h263.h"
22#include "flv.h"
23
24void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number)
25{
26      int format;
27
28      align_put_bits(&s->pb);
29
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)
35        format = 2;
36      else if (s->width == 176 && s->height == 144)
37        format = 3;
38      else if (s->width == 128 && s->height == 96)
39        format = 4;
40      else if (s->width == 320 && s->height == 240)
41        format = 5;
42      else if (s->width == 160 && s->height == 120)
43        format = 6;
44      else if (s->width <= 255 && s->height <= 255)
45        format = 0; /* use 1 byte width & height */
46      else
47        format = 1; /* use 2 bytes width & height */
48      put_bits(&s->pb, 3, format); /* PictureSize */
49      if (format == 0) {
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);
55      }
56      put_bits(&s->pb, 2, s->pict_type == FF_P_TYPE); /* 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 */
60
61      if(s->h263_aic){
62        s->y_dc_scale_table=
63          s->c_dc_scale_table= ff_aic_dc_scale_table;
64      }else{
65        s->y_dc_scale_table=
66          s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
67      }
68}
69
70void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level, int run, int last){
71    if(level < 64) { // 7-bit level
72        put_bits(pb, 1, 0);
73        put_bits(pb, 1, last);
74        put_bits(pb, 6, run);
75
76        put_sbits(pb, 7, slevel);
77    } else {
78        /* 11-bit level */
79        put_bits(pb, 1, 1);
80        put_bits(pb, 1, last);
81        put_bits(pb, 6, run);
82
83        put_sbits(pb, 11, slevel);
84    }
85}
86
87AVCodec flv_encoder = {
88    "flv",
89    AVMEDIA_TYPE_VIDEO,
90    CODEC_ID_FLV1,
91    sizeof(MpegEncContext),
92    MPV_encode_init,
93    MPV_encode_picture,
94    MPV_encode_end,
95    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
96    .long_name= NULL_IF_CONFIG_SMALL("Flash Video (FLV) / Sorenson Spark / Sorenson H.263"),
97};
98