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/*
* Copyright (c) 2011 Mina Nagy Zaki
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* format audio filter
*/
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
typedef struct AFormatContext {
const AVClass *class;
enum AVSampleFormat *formats;
unsigned nb_formats;
int *sample_rates;
unsigned nb_sample_rates;
AVChannelLayout *channel_layouts;
unsigned nb_channel_layouts;
} AFormatContext;
static const AVOptionArrayDef array_def = { .sep = '|' };
#define OFFSET(x) offsetof(AFormatContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
#define F AV_OPT_FLAG_FILTERING_PARAM
static const AVOption aformat_options[] = {
{ "sample_fmts", "A '|'-separated list of sample formats.", OFFSET(formats),
AV_OPT_TYPE_SAMPLE_FMT | AV_OPT_TYPE_FLAG_ARRAY, .default_val.arr = &array_def, .flags = A|F },
{ "f", "A '|'-separated list of sample formats.", OFFSET(formats),
AV_OPT_TYPE_SAMPLE_FMT | AV_OPT_TYPE_FLAG_ARRAY, .default_val.arr = &array_def, .flags = A|F },
{ "sample_rates", "A '|'-separated list of sample rates.", OFFSET(sample_rates),
AV_OPT_TYPE_INT | AV_OPT_TYPE_FLAG_ARRAY, .default_val.arr = &array_def, .min = 1, .max = INT_MAX, .flags = A|F },
{ "r", "A '|'-separated list of sample rates.", OFFSET(sample_rates),
AV_OPT_TYPE_INT | AV_OPT_TYPE_FLAG_ARRAY, .default_val.arr = &array_def, .min = 1, .max = INT_MAX, .flags = A|F },
{ "channel_layouts", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts),
AV_OPT_TYPE_CHLAYOUT | AV_OPT_TYPE_FLAG_ARRAY, .default_val.arr = &array_def, .flags = A|F },
{ "cl", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts),
AV_OPT_TYPE_CHLAYOUT | AV_OPT_TYPE_FLAG_ARRAY, .default_val.arr = &array_def, .flags = A|F },
{ NULL }
};
AVFILTER_DEFINE_CLASS(aformat);
static av_cold int init(AVFilterContext *ctx)
{
AFormatContext *s = ctx->priv;
// terminate format lists for ff_set*_from_list()
if (s->nb_formats) {
void *tmp = av_realloc_array(s->formats, s->nb_formats + 1,
sizeof(*s->formats));
if (!tmp)
return AVERROR(ENOMEM);
s->formats = tmp;
s->formats[s->nb_formats] = AV_SAMPLE_FMT_NONE;
}
if (s->nb_sample_rates) {
void *tmp = av_realloc_array(s->sample_rates, s->nb_sample_rates + 1,
sizeof(*s->sample_rates));
if (!tmp)
return AVERROR(ENOMEM);
s->sample_rates = tmp;
s->sample_rates[s->nb_sample_rates] = -1;
}
if (s->nb_channel_layouts) {
void *tmp = av_realloc_array(s->channel_layouts, s->nb_channel_layouts + 1,
sizeof(*s->channel_layouts));
if (!tmp)
return AVERROR(ENOMEM);
s->channel_layouts = tmp;
s->channel_layouts[s->nb_channel_layouts] = (AVChannelLayout){ .nb_channels = 0 };
}
return 0;
}
static int query_formats(const AVFilterContext *ctx,
AVFilterFormatsConfig **cfg_in,
AVFilterFormatsConfig **cfg_out)
{
const AFormatContext *s = ctx->priv;
int ret;
if (s->nb_formats) {
ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, s->formats);
if (ret < 0)
return ret;
}
if (s->nb_sample_rates) {
ret = ff_set_common_samplerates_from_list2(ctx, cfg_in, cfg_out, s->sample_rates);
if (ret < 0)
return ret;
}
if (s->nb_channel_layouts) {
ret = ff_set_common_channel_layouts_from_list2(ctx, cfg_in, cfg_out, s->channel_layouts);
if (ret < 0)
return ret;
}
return 0;
}
const AVFilter ff_af_aformat = {
.name = "aformat",
.description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
.init = init,
.priv_size = sizeof(AFormatContext),
.priv_class = &aformat_class,
.flags = AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(ff_audio_default_filterpad),
FILTER_OUTPUTS(ff_audio_default_filterpad),
FILTER_QUERY_FUNC2(query_formats),
};
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