2011-07-14 11:18:13 +00:00
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/*
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* Copyright (c) 2011 Mina Nagy Zaki
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* format audio filter
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*/
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#include "libavutil/audioconvert.h"
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2011-08-16 00:02:44 +00:00
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#include "libavutil/avstring.h"
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2011-07-14 11:18:13 +00:00
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#include "avfilter.h"
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#include "internal.h"
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typedef struct {
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AVFilterFormats *formats, *chlayouts, *packing;
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} AFormatContext;
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static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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AFormatContext * const aformat = ctx->priv;
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2011-08-16 00:02:44 +00:00
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char *fmts_str = NULL, *fmt_str, *ptr = NULL;
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2011-07-14 11:18:13 +00:00
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int64_t fmt;
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int ret;
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2011-08-16 00:02:44 +00:00
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if (!args)
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goto arg_fail;
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2011-08-16 14:54:04 +00:00
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#define ADD_FORMATS(all_formats, fmt_name, fmt_type, fmts_list) \
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fmts_str = av_get_token(&args, ":"); \
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if (!fmts_str || !*fmts_str) \
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goto arg_fail; \
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if (!strcmp(fmts_str, "all")) { \
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aformat->fmts_list = all_formats; \
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} else { \
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for (fmt_str = fmts_str; \
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fmt_str = strtok_r(fmt_str, ",", &ptr); fmt_str = NULL) { \
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if ((ret = ff_parse_##fmt_name((fmt_type *)&fmt, \
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fmt_str, ctx)) < 0) { \
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av_freep(&fmts_str); \
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return ret; \
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} \
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avfilter_add_format(&aformat->fmts_list, fmt); \
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} \
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} \
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av_freep(&fmts_str); \
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if (*args) \
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2011-08-16 00:02:44 +00:00
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args++;
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2011-07-14 11:18:13 +00:00
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2011-08-16 14:54:04 +00:00
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ADD_FORMATS(avfilter_all_formats(AVMEDIA_TYPE_AUDIO), sample_format, int, formats);
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ADD_FORMATS(avfilter_all_channel_layouts(), channel_layout, int64_t, chlayouts);
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ADD_FORMATS(avfilter_all_packing_formats(), packing_format, int, packing);
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2011-07-14 11:18:13 +00:00
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return 0;
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arg_fail:
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av_log(ctx, AV_LOG_ERROR, "Invalid arguments, they must be of the form "
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"sample_fmts:channel_layouts:packing_fmts\n");
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2011-08-16 00:02:44 +00:00
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av_freep(&fmts_str);
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2011-07-14 11:18:13 +00:00
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return AVERROR(EINVAL);
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AFormatContext * const aformat = ctx->priv;
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avfilter_set_common_sample_formats (ctx, aformat->formats);
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avfilter_set_common_channel_layouts(ctx, aformat->chlayouts);
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avfilter_set_common_packing_formats(ctx, aformat->packing);
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return 0;
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}
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static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamplesref)
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{
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avfilter_filter_samples(inlink->dst->outputs[0], insamplesref);
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}
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AVFilter avfilter_af_aformat = {
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.name = "aformat",
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.description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
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.init = init,
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.query_formats = query_formats,
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.priv_size = sizeof(AFormatContext),
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.filter_samples = filter_samples},
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{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_AUDIO},
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{ .name = NULL}},
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};
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