mirror of
https://github.com/FFmpeg/FFmpeg.git
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f1fa1eed2a
Having this macro in an header only facilitates the use of such header. The code increase is minimal and files have one less dependency on mpegvideo.h.
114 lines
3.7 KiB
C
114 lines
3.7 KiB
C
/*
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* FLV Encoding specific code.
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "flv.h"
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#include "h263.h"
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#include "h263data.h"
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#include "mpegvideo.h"
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#include "mpegvideodata.h"
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void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number)
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{
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int format;
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avpriv_align_put_bits(&s->pb);
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put_bits(&s->pb, 17, 1);
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/* 0: h263 escape codes 1: 11-bit escape codes */
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put_bits(&s->pb, 5, (s->h263_flv - 1));
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put_bits(&s->pb, 8,
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(((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp
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s->avctx->time_base.den) & 0xff); /* TemporalReference */
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if (s->width == 352 && s->height == 288)
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format = 2;
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else if (s->width == 176 && s->height == 144)
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format = 3;
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else if (s->width == 128 && s->height == 96)
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format = 4;
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else if (s->width == 320 && s->height == 240)
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format = 5;
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else if (s->width == 160 && s->height == 120)
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format = 6;
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else if (s->width <= 255 && s->height <= 255)
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format = 0; /* use 1 byte width & height */
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else
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format = 1; /* use 2 bytes width & height */
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put_bits(&s->pb, 3, format); /* PictureSize */
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if (format == 0) {
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put_bits(&s->pb, 8, s->width);
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put_bits(&s->pb, 8, s->height);
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} else if (format == 1) {
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put_bits(&s->pb, 16, s->width);
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put_bits(&s->pb, 16, s->height);
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}
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put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */
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put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
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put_bits(&s->pb, 5, s->qscale); /* Quantizer */
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put_bits(&s->pb, 1, 0); /* ExtraInformation */
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if (s->h263_aic) {
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s->y_dc_scale_table =
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s->c_dc_scale_table = ff_aic_dc_scale_table;
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} else {
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s->y_dc_scale_table =
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s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
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}
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}
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void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level,
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int run, int last)
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{
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if (level < 64) { // 7-bit level
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put_bits(pb, 1, 0);
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put_bits(pb, 1, last);
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put_bits(pb, 6, run);
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put_sbits(pb, 7, slevel);
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} else {
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/* 11-bit level */
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put_bits(pb, 1, 1);
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put_bits(pb, 1, last);
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put_bits(pb, 6, run);
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put_sbits(pb, 11, slevel);
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}
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}
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static const AVClass flv_class = {
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.class_name = "flv encoder",
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.item_name = av_default_item_name,
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.option = ff_mpv_generic_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_flv_encoder = {
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.name = "flv",
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.long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_FLV1,
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.priv_data_size = sizeof(MpegEncContext),
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.init = ff_mpv_encode_init,
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.encode2 = ff_mpv_encode_picture,
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.close = ff_mpv_encode_end,
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.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE},
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.priv_class = &flv_class,
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};
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