LCOV - code coverage report
Current view: top level - src/libavfilter - af_aformat.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 16 18 88.9 %
Date: 2017-01-24 04:42:20 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2011 Mina Nagy Zaki
       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             :  * format audio filter
      24             :  */
      25             : 
      26             : #include "libavutil/avstring.h"
      27             : #include "libavutil/channel_layout.h"
      28             : #include "libavutil/common.h"
      29             : #include "libavutil/opt.h"
      30             : 
      31             : #include "audio.h"
      32             : #include "avfilter.h"
      33             : #include "formats.h"
      34             : #include "internal.h"
      35             : 
      36             : typedef struct AFormatContext {
      37             :     const AVClass   *class;
      38             : 
      39             :     AVFilterFormats *formats;
      40             :     AVFilterFormats *sample_rates;
      41             :     AVFilterChannelLayouts *channel_layouts;
      42             : 
      43             :     char *formats_str;
      44             :     char *sample_rates_str;
      45             :     char *channel_layouts_str;
      46             : } AFormatContext;
      47             : 
      48             : #define OFFSET(x) offsetof(AFormatContext, x)
      49             : #define A AV_OPT_FLAG_AUDIO_PARAM
      50             : #define F AV_OPT_FLAG_FILTERING_PARAM
      51             : static const AVOption aformat_options[] = {
      52             :     { "sample_fmts",     "A '|'-separated list of sample formats.",  OFFSET(formats_str),         AV_OPT_TYPE_STRING, .flags = A|F },
      53             :     { "sample_rates",    "A '|'-separated list of sample rates.",    OFFSET(sample_rates_str),    AV_OPT_TYPE_STRING, .flags = A|F },
      54             :     { "channel_layouts", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
      55             :     { NULL }
      56             : };
      57             : 
      58             : AVFILTER_DEFINE_CLASS(aformat);
      59             : 
      60             : #define PARSE_FORMATS(str, type, list, add_to_list, unref_fn, get_fmt, none, desc)    \
      61             : do {                                                                        \
      62             :     char *next, *cur = str, sep;                                            \
      63             :     int ret;                                                                \
      64             :                                                                             \
      65             :     if (str && strchr(str, ',')) {                                          \
      66             :         av_log(ctx, AV_LOG_WARNING, "This syntax is deprecated, use '|' to "\
      67             :                "separate %s.\n", desc);                                     \
      68             :         sep = ',';                                                          \
      69             :     } else                                                                  \
      70             :         sep = '|';                                                          \
      71             :                                                                             \
      72             :     while (cur) {                                                           \
      73             :         type fmt;                                                           \
      74             :         next = strchr(cur, sep);                                            \
      75             :         if (next)                                                           \
      76             :             *next++ = 0;                                                    \
      77             :                                                                             \
      78             :         if ((fmt = get_fmt(cur)) == none) {                                 \
      79             :             av_log(ctx, AV_LOG_ERROR, "Error parsing " desc ": %s.\n", cur);\
      80             :             return AVERROR(EINVAL);                                         \
      81             :         }                                                                   \
      82             :         if ((ret = add_to_list(&list, fmt)) < 0) {                          \
      83             :             unref_fn(&list);                                                \
      84             :             return ret;                                                     \
      85             :         }                                                                   \
      86             :                                                                             \
      87             :         cur = next;                                                         \
      88             :     }                                                                       \
      89             : } while (0)
      90             : 
      91         259 : static int get_sample_rate(const char *samplerate)
      92             : {
      93         259 :     int ret = strtol(samplerate, NULL, 0);
      94         259 :     return FFMAX(ret, 0);
      95             : }
      96             : 
      97        1269 : static av_cold int init(AVFilterContext *ctx)
      98             : {
      99        1269 :     AFormatContext *s = ctx->priv;
     100             : 
     101        1269 :     PARSE_FORMATS(s->formats_str, enum AVSampleFormat, s->formats,
     102             :                   ff_add_format, ff_formats_unref, av_get_sample_fmt, AV_SAMPLE_FMT_NONE, "sample format");
     103        1269 :     PARSE_FORMATS(s->sample_rates_str, int, s->sample_rates, ff_add_format, ff_formats_unref,
     104             :                   get_sample_rate, 0, "sample rate");
     105        1269 :     PARSE_FORMATS(s->channel_layouts_str, uint64_t, s->channel_layouts,
     106             :                   ff_add_channel_layout, ff_channel_layouts_unref, av_get_channel_layout, 0,
     107             :                   "channel layout");
     108             : 
     109        1269 :     return 0;
     110             : }
     111             : 
     112        1269 : static int query_formats(AVFilterContext *ctx)
     113             : {
     114        1269 :     AFormatContext *s = ctx->priv;
     115             :     int ret;
     116             : 
     117        1269 :     ret = ff_set_common_formats(ctx, s->formats ? s->formats :
     118             :                                             ff_all_formats(AVMEDIA_TYPE_AUDIO));
     119        1269 :     if (ret < 0)
     120           0 :         return ret;
     121        1269 :     ret = ff_set_common_samplerates(ctx, s->sample_rates ? s->sample_rates :
     122             :                                                      ff_all_samplerates());
     123        1269 :     if (ret < 0)
     124           0 :         return ret;
     125        1269 :     return ff_set_common_channel_layouts(ctx, s->channel_layouts ? s->channel_layouts :
     126             :                                                             ff_all_channel_counts());
     127             : }
     128             : 
     129             : static const AVFilterPad avfilter_af_aformat_inputs[] = {
     130             :     {
     131             :         .name = "default",
     132             :         .type = AVMEDIA_TYPE_AUDIO,
     133             :     },
     134             :     { NULL }
     135             : };
     136             : 
     137             : static const AVFilterPad avfilter_af_aformat_outputs[] = {
     138             :     {
     139             :         .name = "default",
     140             :         .type = AVMEDIA_TYPE_AUDIO
     141             :     },
     142             :     { NULL }
     143             : };
     144             : 
     145             : AVFilter ff_af_aformat = {
     146             :     .name          = "aformat",
     147             :     .description   = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
     148             :     .init          = init,
     149             :     .query_formats = query_formats,
     150             :     .priv_size     = sizeof(AFormatContext),
     151             :     .priv_class    = &aformat_class,
     152             :     .inputs        = avfilter_af_aformat_inputs,
     153             :     .outputs       = avfilter_af_aformat_outputs,
     154             : };

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