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/*
* FLV Encoding specific code.
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mpegvideo.h"
#include "h263.h"
#include "flv.h"
void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number)
{
int format;
align_put_bits(&s->pb);
put_bits(&s->pb, 17, 1);
put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */
put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->time_base.num) / //FIXME use timestamp
s->avctx->time_base.den) & 0xff); /* TemporalReference */
if (s->width == 352 && s->height == 288)
format = 2;
else if (s->width == 176 && s->height == 144)
format = 3;
else if (s->width == 128 && s->height == 96)
format = 4;
else if (s->width == 320 && s->height == 240)
format = 5;
else if (s->width == 160 && s->height == 120)
format = 6;
else if (s->width <= 255 && s->height <= 255)
format = 0; /* use 1 byte width & height */
else
format = 1; /* use 2 bytes width & height */
put_bits(&s->pb, 3, format); /* PictureSize */
if (format == 0) {
put_bits(&s->pb, 8, s->width);
put_bits(&s->pb, 8, s->height);
} else if (format == 1) {
put_bits(&s->pb, 16, s->width);
put_bits(&s->pb, 16, s->height);
}
put_bits(&s->pb, 2, s->pict_type == FF_P_TYPE); /* PictureType */
put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
put_bits(&s->pb, 5, s->qscale); /* Quantizer */
put_bits(&s->pb, 1, 0); /* ExtraInformation */
if(s->h263_aic){
s->y_dc_scale_table=
s->c_dc_scale_table= ff_aic_dc_scale_table;
}else{
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
}
}
void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level, int run, int last){
if(level < 64) { // 7-bit level
put_bits(pb, 1, 0);
put_bits(pb, 1, last);
put_bits(pb, 6, run);
put_sbits(pb, 7, slevel);
} else {
/* 11-bit level */
put_bits(pb, 1, 1);
put_bits(pb, 1, last);
put_bits(pb, 6, run);
put_sbits(pb, 11, slevel);
}
}
AVCodec ff_flv_encoder = {
"flv",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_FLV1,
sizeof(MpegEncContext),
MPV_encode_init,
MPV_encode_picture,
MPV_encode_end,
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
.long_name= NULL_IF_CONFIG_SMALL("Flash Video (FLV) / Sorenson Spark / Sorenson H.263"),
};
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