LCOV - code coverage report
Current view: top level - libavcodec - flvenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 40 48 83.3 %
Date: 2017-12-16 13:57:32 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * FLV Encoding specific code.
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "flv.h"
      22             : #include "h263.h"
      23             : #include "h263data.h"
      24             : #include "mpegvideo.h"
      25             : #include "mpegvideodata.h"
      26             : 
      27         390 : void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number)
      28             : {
      29             :     int format;
      30             : 
      31         390 :     avpriv_align_put_bits(&s->pb);
      32             : 
      33         390 :     put_bits(&s->pb, 17, 1);
      34             :     /* 0: H.263 escape codes 1: 11-bit escape codes */
      35         390 :     put_bits(&s->pb, 5, (s->h263_flv - 1));
      36         390 :     put_bits(&s->pb, 8,
      37         780 :              (((int64_t) s->picture_number * 30 * s->avctx->time_base.num) /   // FIXME use timestamp
      38         780 :               s->avctx->time_base.den) & 0xff);   /* TemporalReference */
      39         390 :     if (s->width == 352 && s->height == 288)
      40         200 :         format = 2;
      41         190 :     else if (s->width == 176 && s->height == 144)
      42           0 :         format = 3;
      43         190 :     else if (s->width == 128 && s->height == 96)
      44           0 :         format = 4;
      45         190 :     else if (s->width == 320 && s->height == 240)
      46         140 :         format = 5;
      47          50 :     else if (s->width == 160 && s->height == 120)
      48           0 :         format = 6;
      49          50 :     else if (s->width <= 255 && s->height <= 255)
      50          50 :         format = 0;   /* use 1 byte width & height */
      51             :     else
      52           0 :         format = 1;   /* use 2 bytes width & height */
      53         390 :     put_bits(&s->pb, 3, format);   /* PictureSize */
      54         390 :     if (format == 0) {
      55          50 :         put_bits(&s->pb, 8, s->width);
      56          50 :         put_bits(&s->pb, 8, s->height);
      57         340 :     } else if (format == 1) {
      58           0 :         put_bits(&s->pb, 16, s->width);
      59           0 :         put_bits(&s->pb, 16, s->height);
      60             :     }
      61         390 :     put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P);   /* PictureType */
      62         390 :     put_bits(&s->pb, 1, 1);   /* DeblockingFlag: on */
      63         390 :     put_bits(&s->pb, 5, s->qscale);   /* Quantizer */
      64         390 :     put_bits(&s->pb, 1, 0);   /* ExtraInformation */
      65             : 
      66         390 :     if (s->h263_aic) {
      67           0 :         s->y_dc_scale_table =
      68           0 :         s->c_dc_scale_table = ff_aic_dc_scale_table;
      69             :     } else {
      70         390 :         s->y_dc_scale_table =
      71         390 :         s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
      72             :     }
      73         390 : }
      74             : 
      75      187500 : void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level,
      76             :                            int run, int last)
      77             : {
      78      187500 :     if (level < 64) { // 7-bit level
      79      175592 :         put_bits(pb, 1, 0);
      80      175592 :         put_bits(pb, 1, last);
      81      175592 :         put_bits(pb, 6, run);
      82             : 
      83      175592 :         put_sbits(pb, 7, slevel);
      84             :     } else {
      85             :         /* 11-bit level */
      86       11908 :         put_bits(pb, 1, 1);
      87       11908 :         put_bits(pb, 1, last);
      88       11908 :         put_bits(pb, 6, run);
      89             : 
      90       11908 :         put_sbits(pb, 11, slevel);
      91             :     }
      92      187500 : }
      93             : 
      94             : static const AVClass flv_class = {
      95             :     .class_name = "flv encoder",
      96             :     .item_name  = av_default_item_name,
      97             :     .option     = ff_mpv_generic_options,
      98             :     .version    = LIBAVUTIL_VERSION_INT,
      99             : };
     100             : 
     101             : AVCodec ff_flv_encoder = {
     102             :     .name           = "flv",
     103             :     .long_name      = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
     104             :     .type           = AVMEDIA_TYPE_VIDEO,
     105             :     .id             = AV_CODEC_ID_FLV1,
     106             :     .priv_data_size = sizeof(MpegEncContext),
     107             :     .init           = ff_mpv_encode_init,
     108             :     .encode2        = ff_mpv_encode_picture,
     109             :     .close          = ff_mpv_encode_end,
     110             :     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
     111             :                                                      AV_PIX_FMT_NONE},
     112             :     .priv_class     = &flv_class,
     113             : };

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