1 files changed, 108 insertions, 0 deletions
diff --git a/libavfilter/af_aformat.c b/libavfilter/af_aformat.c
new file mode 100644
index 0000000..20ab940
--- /dev/null
+++ b/libavfilter/af_aformat.c
@@ -0,0 +1,108 @@
+/*
+ * 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 = av_strtok(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_make_all_formats(AVMEDIA_TYPE_AUDIO), sample_format, int, formats);
+    ADD_FORMATS(avfilter_make_all_channel_layouts(), channel_layout, int64_t, chlayouts);
+    ADD_FORMATS(avfilter_make_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}},
+};