--- /dev/null
+/*
+ * 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 "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 *arg, *fmt_str;
+ int64_t fmt;
+ int ret;
+
+ arg = strsep(&args, ":");
+ if (!arg) goto arg_fail;
+ if (!strcmp(arg, "all")) {
+ aformat->formats = avfilter_all_formats(AVMEDIA_TYPE_AUDIO);
+ } else {
+ while (fmt_str = strsep(&arg, ",")) {
+ if ((ret = ff_parse_sample_format((int*)&fmt, fmt_str, ctx)) < 0)
+ return ret;
+ avfilter_add_format(&aformat->formats, fmt);
+ }
+ }
+
+ arg = strsep(&args, ":");
+ if (!arg) goto arg_fail;
+ if (!strcmp(arg, "all")) {
+ aformat->chlayouts = avfilter_all_channel_layouts();
+ } else {
+ while (fmt_str = strsep(&arg, ",")) {
+ if ((ret = ff_parse_channel_layout(&fmt, fmt_str, ctx)) < 0)
+ return ret;
+ avfilter_add_format(&aformat->chlayouts, fmt);
+ }
+ }
+
+ arg = strsep(&args, ":");
+ if (!arg) goto arg_fail;
+ if (!strcmp(arg, "all")) {
+ aformat->packing = avfilter_all_packing_formats();
+ } else {
+ while (fmt_str = strsep(&arg, ",")) {
+ if ((ret = ff_parse_packing_format((int*)&fmt, fmt_str, ctx)) < 0)
+ return ret;
+ avfilter_add_format(&aformat->packing, fmt);
+ }
+ }
+
+ 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");
+ 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}},
+};