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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/audioconvert.h"
#include "libavutil/avstring.h"
#include "avfilter.h"
#include "internal.h"
typedef struct {
AVFilterFormats *formats, *chlayouts, *packing;
} AFormatContext;
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
AFormatContext * const aformat = ctx->priv;
char *fmts_str = NULL, *fmt_str, *ptr = NULL;
int64_t fmt;
int ret;
if (!args)
goto arg_fail;
#define ADD_FORMATS(all_formats, fmt_name, fmt_type, fmts_list) \
fmts_str = av_get_token(&args, ":"); \
if (!fmts_str || !*fmts_str) \
goto arg_fail; \
if (!strcmp(fmts_str, "all")) { \
aformat->fmts_list = all_formats; \
} else { \
for (fmt_str = fmts_str; \
fmt_str = strtok_r(fmt_str, ",", &ptr); fmt_str = NULL) { \
if ((ret = ff_parse_##fmt_name((fmt_type *)&fmt, \
fmt_str, ctx)) < 0) { \
av_freep(&fmts_str); \
return ret; \
} \
avfilter_add_format(&aformat->fmts_list, fmt); \
} \
} \
av_freep(&fmts_str); \
if (*args) \
args++;
ADD_FORMATS(avfilter_all_formats(AVMEDIA_TYPE_AUDIO), sample_format, int, formats);
ADD_FORMATS(avfilter_all_channel_layouts(), channel_layout, int64_t, chlayouts);
ADD_FORMATS(avfilter_all_packing_formats(), packing_format, int, packing);
return 0;
arg_fail:
av_log(ctx, AV_LOG_ERROR, "Invalid arguments, they must be of the form "
"sample_fmts:channel_layouts:packing_fmts\n");
av_freep(&fmts_str);
return AVERROR(EINVAL);
}
static int query_formats(AVFilterContext *ctx)
{
AFormatContext * const aformat = ctx->priv;
avfilter_set_common_sample_formats (ctx, aformat->formats);
avfilter_set_common_channel_layouts(ctx, aformat->chlayouts);
avfilter_set_common_packing_formats(ctx, aformat->packing);
return 0;
}
static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamplesref)
{
avfilter_filter_samples(inlink->dst->outputs[0], insamplesref);
}
AVFilter avfilter_af_aformat = {
.name = "aformat",
.description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
.init = init,
.query_formats = query_formats,
.priv_size = sizeof(AFormatContext),
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_samples = filter_samples},
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO},
{ .name = NULL}},
};
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