LCOV - code coverage report
Current view: top level - libavcodec - remove_extradata_bsf.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 29 31 93.5 %
Date: 2017-12-16 13:57:32 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
       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 "libavutil/log.h"
      22             : #include "libavutil/opt.h"
      23             : 
      24             : #include "avcodec.h"
      25             : #include "bsf.h"
      26             : 
      27             : enum RemoveFreq {
      28             :     REMOVE_FREQ_KEYFRAME,
      29             :     REMOVE_FREQ_ALL,
      30             :     REMOVE_FREQ_NONKEYFRAME,
      31             : };
      32             : 
      33             : typedef struct RemoveExtradataContext {
      34             :     const AVClass *class;
      35             :     int freq;
      36             : 
      37             :     AVCodecParserContext *parser;
      38             :     AVCodecContext *avctx;
      39             : } RemoveExtradataContext;
      40             : 
      41         153 : static int remove_extradata(AVBSFContext *ctx, AVPacket *out)
      42             : {
      43         153 :     RemoveExtradataContext *s = ctx->priv_data;
      44             : 
      45             :     AVPacket *in;
      46             :     int ret;
      47             : 
      48         153 :     ret = ff_bsf_get_packet(ctx, &in);
      49         153 :     if (ret < 0)
      50          78 :         return ret;
      51             : 
      52          75 :     if (s->parser && s->parser->parser->split) {
      53         125 :         if (s->freq == REMOVE_FREQ_ALL ||
      54         103 :             (s->freq == REMOVE_FREQ_NONKEYFRAME && !(in->flags & AV_PKT_FLAG_KEY)) ||
      55          53 :             (s->freq == REMOVE_FREQ_KEYFRAME && in->flags & AV_PKT_FLAG_KEY)) {
      56          50 :             int i = s->parser->parser->split(s->avctx, in->data, in->size);
      57          50 :             in->data += i;
      58          50 :             in->size -= i;
      59             :         }
      60             :     }
      61             : 
      62          75 :     av_packet_move_ref(out, in);
      63          75 :     av_packet_free(&in);
      64             : 
      65          75 :     return 0;
      66             : }
      67             : 
      68           3 : static int remove_extradata_init(AVBSFContext *ctx)
      69             : {
      70           3 :     RemoveExtradataContext *s = ctx->priv_data;
      71             :     int ret;
      72             : 
      73           3 :     s->parser = av_parser_init(ctx->par_in->codec_id);
      74             : 
      75           3 :     if (s->parser) {
      76           3 :         s->avctx = avcodec_alloc_context3(NULL);
      77           3 :         if (!s->avctx)
      78           0 :             return AVERROR(ENOMEM);
      79             : 
      80           3 :         ret = avcodec_parameters_to_context(s->avctx, ctx->par_in);
      81           3 :         if (ret < 0)
      82           0 :             return ret;
      83             :     }
      84             : 
      85           3 :     return 0;
      86             : }
      87             : 
      88           3 : static void remove_extradata_close(AVBSFContext *ctx)
      89             : {
      90           3 :     RemoveExtradataContext *s = ctx->priv_data;
      91             : 
      92           3 :     avcodec_free_context(&s->avctx);
      93           3 :     av_parser_close(s->parser);
      94           3 : }
      95             : 
      96             : #define OFFSET(x) offsetof(RemoveExtradataContext, x)
      97             : static const AVOption options[] = {
      98             :     { "freq", NULL, OFFSET(freq), AV_OPT_TYPE_INT, { .i64 = REMOVE_FREQ_KEYFRAME }, REMOVE_FREQ_KEYFRAME, REMOVE_FREQ_NONKEYFRAME, 0, "freq" },
      99             :         { "k",        NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_NONKEYFRAME }, .unit = "freq" },
     100             :         { "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_KEYFRAME }, .unit = "freq" },
     101             :         { "e",        NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL      }, .unit = "freq" },
     102             :         { "all",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL      }, .unit = "freq" },
     103             :     { NULL },
     104             : };
     105             : 
     106             : static const AVClass remove_extradata_class = {
     107             :     .class_name = "remove_extradata",
     108             :     .item_name  = av_default_item_name,
     109             :     .option     = options,
     110             :     .version    = LIBAVUTIL_VERSION_INT,
     111             : };
     112             : 
     113             : const AVBitStreamFilter ff_remove_extradata_bsf = {
     114             :     .name           = "remove_extra",
     115             :     .priv_data_size = sizeof(RemoveExtradataContext),
     116             :     .priv_class     = &remove_extradata_class,
     117             :     .init           = remove_extradata_init,
     118             :     .close          = remove_extradata_close,
     119             :     .filter         = remove_extradata,
     120             : };

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