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4243da4ff4
This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
109 lines
3.7 KiB
C
109 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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "codec_internal.h"
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#include "flvenc.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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#include "mpegvideoenc.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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align_put_bits(&s->pb);
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put_bits(&s->pb, 17, 1);
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/* 0: H.263 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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const FFCodec ff_flv_encoder = {
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.p.name = "flv",
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.p.long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_FLV1,
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.p.priv_class = &ff_mpv_enc_class,
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.priv_data_size = sizeof(MpegEncContext),
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.init = ff_mpv_encode_init,
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FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
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.close = ff_mpv_encode_end,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE},
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};
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