LCOV - code coverage report
Current view: top level - libavfilter - settb.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 23 27 85.2 %
Date: 2017-12-13 18:07:29 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2010 Stefano Sabatini
       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             : /**
      22             :  * @file
      23             :  * Set timebase for the output link.
      24             :  */
      25             : 
      26             : #include <inttypes.h>
      27             : #include <stdio.h>
      28             : 
      29             : #include "libavutil/avstring.h"
      30             : #include "libavutil/eval.h"
      31             : #include "libavutil/internal.h"
      32             : #include "libavutil/mathematics.h"
      33             : #include "libavutil/opt.h"
      34             : #include "libavutil/rational.h"
      35             : #include "audio.h"
      36             : #include "avfilter.h"
      37             : #include "internal.h"
      38             : #include "video.h"
      39             : 
      40             : static const char *const var_names[] = {
      41             :     "AVTB",   /* default timebase 1/AV_TIME_BASE */
      42             :     "intb",   /* input timebase */
      43             :     "sr",     /* sample rate */
      44             :     NULL
      45             : };
      46             : 
      47             : enum var_name {
      48             :     VAR_AVTB,
      49             :     VAR_INTB,
      50             :     VAR_SR,
      51             :     VAR_VARS_NB
      52             : };
      53             : 
      54             : typedef struct SetTBContext {
      55             :     const AVClass *class;
      56             :     char *tb_expr;
      57             :     double var_values[VAR_VARS_NB];
      58             : } SetTBContext;
      59             : 
      60             : #define OFFSET(x) offsetof(SetTBContext, x)
      61             : #define DEFINE_OPTIONS(filt_name, filt_type)                                               \
      62             : static const AVOption filt_name##_options[] = {                                            \
      63             :     { "expr", "set expression determining the output timebase", OFFSET(tb_expr), AV_OPT_TYPE_STRING, {.str="intb"}, \
      64             :            .flags=AV_OPT_FLAG_##filt_type##_PARAM|AV_OPT_FLAG_FILTERING_PARAM },           \
      65             :     { "tb",   "set expression determining the output timebase", OFFSET(tb_expr), AV_OPT_TYPE_STRING, {.str="intb"}, \
      66             :            .flags=AV_OPT_FLAG_##filt_type##_PARAM|AV_OPT_FLAG_FILTERING_PARAM },           \
      67             :     { NULL }                                                                               \
      68             : }
      69             : 
      70           1 : static int config_output_props(AVFilterLink *outlink)
      71             : {
      72           1 :     AVFilterContext *ctx = outlink->src;
      73           1 :     SetTBContext *settb = ctx->priv;
      74           1 :     AVFilterLink *inlink = ctx->inputs[0];
      75             :     AVRational time_base;
      76             :     int ret;
      77             :     double res;
      78             : 
      79           1 :     settb->var_values[VAR_AVTB] = av_q2d(AV_TIME_BASE_Q);
      80           1 :     settb->var_values[VAR_INTB] = av_q2d(inlink->time_base);
      81           1 :     settb->var_values[VAR_SR]   = inlink->sample_rate;
      82             : 
      83           1 :     outlink->w = inlink->w;
      84           1 :     outlink->h = inlink->h;
      85             : 
      86           1 :     if ((ret = av_expr_parse_and_eval(&res, settb->tb_expr, var_names, settb->var_values,
      87             :                                       NULL, NULL, NULL, NULL, NULL, 0, NULL)) < 0) {
      88           0 :         av_log(ctx, AV_LOG_ERROR, "Invalid expression '%s' for timebase.\n", settb->tb_expr);
      89           0 :         return ret;
      90             :     }
      91           1 :     time_base = av_d2q(res, INT_MAX);
      92           1 :     if (time_base.num <= 0 || time_base.den <= 0) {
      93           0 :         av_log(ctx, AV_LOG_ERROR,
      94             :                "Invalid non-positive values for the timebase num:%d or den:%d.\n",
      95             :                time_base.num, time_base.den);
      96           0 :         return AVERROR(EINVAL);
      97             :     }
      98             : 
      99           1 :     outlink->time_base = time_base;
     100           1 :     av_log(outlink->src, AV_LOG_VERBOSE, "tb:%d/%d -> tb:%d/%d\n",
     101             :            inlink ->time_base.num, inlink ->time_base.den,
     102             :            outlink->time_base.num, outlink->time_base.den);
     103             : 
     104           1 :     return 0;
     105             : }
     106             : 
     107          50 : static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
     108             : {
     109          50 :     AVFilterContext *ctx = inlink->dst;
     110          50 :     AVFilterLink *outlink = ctx->outputs[0];
     111             : 
     112          50 :     if (av_cmp_q(inlink->time_base, outlink->time_base)) {
     113          50 :         int64_t orig_pts = frame->pts;
     114          50 :         frame->pts = av_rescale_q(frame->pts, inlink->time_base, outlink->time_base);
     115          50 :         av_log(ctx, AV_LOG_DEBUG, "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
     116             :                inlink ->time_base.num, inlink ->time_base.den, orig_pts,
     117             :                outlink->time_base.num, outlink->time_base.den, frame->pts);
     118             :     }
     119             : 
     120          50 :     return ff_filter_frame(outlink, frame);
     121             : }
     122             : 
     123             : #if CONFIG_SETTB_FILTER
     124             : 
     125             : DEFINE_OPTIONS(settb, VIDEO);
     126             : AVFILTER_DEFINE_CLASS(settb);
     127             : 
     128             : static const AVFilterPad avfilter_vf_settb_inputs[] = {
     129             :     {
     130             :         .name         = "default",
     131             :         .type         = AVMEDIA_TYPE_VIDEO,
     132             :         .filter_frame = filter_frame,
     133             :     },
     134             :     { NULL }
     135             : };
     136             : 
     137             : static const AVFilterPad avfilter_vf_settb_outputs[] = {
     138             :     {
     139             :         .name         = "default",
     140             :         .type         = AVMEDIA_TYPE_VIDEO,
     141             :         .config_props = config_output_props,
     142             :     },
     143             :     { NULL }
     144             : };
     145             : 
     146             : AVFilter ff_vf_settb = {
     147             :     .name        = "settb",
     148             :     .description = NULL_IF_CONFIG_SMALL("Set timebase for the video output link."),
     149             :     .priv_size   = sizeof(SetTBContext),
     150             :     .priv_class  = &settb_class,
     151             :     .inputs      = avfilter_vf_settb_inputs,
     152             :     .outputs     = avfilter_vf_settb_outputs,
     153             : };
     154             : #endif /* CONFIG_SETTB_FILTER */
     155             : 
     156             : #if CONFIG_ASETTB_FILTER
     157             : 
     158             : DEFINE_OPTIONS(asettb, AUDIO);
     159             : AVFILTER_DEFINE_CLASS(asettb);
     160             : 
     161             : static const AVFilterPad avfilter_af_asettb_inputs[] = {
     162             :     {
     163             :         .name         = "default",
     164             :         .type         = AVMEDIA_TYPE_AUDIO,
     165             :         .filter_frame = filter_frame,
     166             :     },
     167             :     { NULL }
     168             : };
     169             : 
     170             : static const AVFilterPad avfilter_af_asettb_outputs[] = {
     171             :     {
     172             :         .name         = "default",
     173             :         .type         = AVMEDIA_TYPE_AUDIO,
     174             :         .config_props = config_output_props,
     175             :     },
     176             :     { NULL }
     177             : };
     178             : 
     179             : AVFilter ff_af_asettb = {
     180             :     .name        = "asettb",
     181             :     .description = NULL_IF_CONFIG_SMALL("Set timebase for the audio output link."),
     182             :     .priv_size   = sizeof(SetTBContext),
     183             :     .inputs      = avfilter_af_asettb_inputs,
     184             :     .outputs     = avfilter_af_asettb_outputs,
     185             :     .priv_class  = &asettb_class,
     186             : };
     187             : #endif /* CONFIG_ASETTB_FILTER */

Generated by: LCOV version 1.13