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https://github.com/FFmpeg/FFmpeg.git
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fea1f42e5f
This already makes several encoders (namely FLV, H.263, H.263+ and
RealVideo 1.0 and 2.0 and SVQ1) that use this init-threadsafe.
It also makes the Snow encoder init-threadsafe; it was already marked
as such since commit d49210788b, because
it was thought to be harmless if one and the same object was
initialized by multiple threads at the same time.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
115 lines
3.8 KiB
C
115 lines
3.8 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 "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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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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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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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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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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