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/*
* FLV Encoding specific code.
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "codec_internal.h"
#include "flvenc.h"
#include "mpegvideo.h"
#include "mpegvideoenc.h"
#include "put_bits.h"
int ff_flv_encode_picture_header(MPVMainEncContext *const m)
{
MPVEncContext *const s = &m->s;
int format;
put_bits_assume_flushed(&s->pb);
put_bits(&s->pb, 17, 1);
/* 0: H.263 escape codes 1: 11-bit escape codes */
put_bits(&s->pb, 5, 1);
put_bits(&s->pb, 8,
(((int64_t) s->picture_number * 30 * s->c.avctx->time_base.num) / // FIXME use timestamp
s->c.avctx->time_base.den) & 0xff); /* TemporalReference */
if (s->c.width == 352 && s->c.height == 288)
format = 2;
else if (s->c.width == 176 && s->c.height == 144)
format = 3;
else if (s->c.width == 128 && s->c.height == 96)
format = 4;
else if (s->c.width == 320 && s->c.height == 240)
format = 5;
else if (s->c.width == 160 && s->c.height == 120)
format = 6;
else if (s->c.width <= 255 && s->c.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->c.width);
put_bits(&s->pb, 8, s->c.height);
} else if (format == 1) {
put_bits(&s->pb, 16, s->c.width);
put_bits(&s->pb, 16, s->c.height);
}
put_bits(&s->pb, 2, s->c.pict_type == AV_PICTURE_TYPE_P); /* PictureType */
put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
put_bits(&s->pb, 5, s->c.qscale); /* Quantizer */
put_bits(&s->pb, 1, 0); /* ExtraInformation */
return 0;
}
const FFCodec ff_flv_encoder = {
.p.name = "flv",
CODEC_LONG_NAME("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_FLV1,
.p.priv_class = &ff_mpv_enc_class,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.priv_data_size = sizeof(MPVMainEncContext),
.init = ff_mpv_encode_init,
FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
.close = ff_mpv_encode_end,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
.color_ranges = AVCOL_RANGE_MPEG,
};
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