0,0 → 1,100 |
/* |
* 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 "mpegvideo.h" |
#include "h263.h" |
#include "flv.h" |
|
void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number) |
{ |
int format; |
|
avpriv_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 == AV_PICTURE_TYPE_P); /* 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); |
} |
} |
|
FF_MPV_GENERIC_CLASS(flv) |
|
AVCodec ff_flv_encoder = { |
.name = "flv", |
.long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_FLV1, |
.priv_data_size = sizeof(MpegEncContext), |
.init = ff_MPV_encode_init, |
.encode2 = ff_MPV_encode_picture, |
.close = ff_MPV_encode_end, |
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, |
.priv_class = &flv_class, |
}; |