lavfi: reclassify showfiltfmts as a TESTPROG

This tool uses lavfi internal symbols not accessible in shared
libraries.  TESTPROGS are linked statically to allow them use of
library internals not normally exported.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/libavfilter/filtfmts.c b/libavfilter/filtfmts.c
new file mode 100644
index 0000000000..8b23c7b844
--- /dev/null
+++ b/libavfilter/filtfmts.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2009 Stefano Sabatini
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+
+#include "libavformat/avformat.h"
+#include "libavutil/pixdesc.h"
+#include "libavfilter/avfilter.h"
+#include "libavfilter/formats.h"
+
+#undef fprintf
+#undef printf
+
+int main(int argc, char **argv)
+{
+    AVFilter *filter;
+    AVFilterContext *filter_ctx;
+    const char *filter_name;
+    const char *filter_args = NULL;
+    int i, j;
+
+    av_log_set_level(AV_LOG_DEBUG);
+
+    if (!argv[1]) {
+        fprintf(stderr, "Missing filter name as argument\n");
+        return 1;
+    }
+
+    filter_name = argv[1];
+    if (argv[2])
+        filter_args = argv[2];
+
+    avfilter_register_all();
+
+    /* get a corresponding filter and open it */
+    if (!(filter = avfilter_get_by_name(filter_name))) {
+        fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
+        return 1;
+    }
+
+    if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
+        fprintf(stderr, "Impossible to open filter with name '%s'\n",
+                filter_name);
+        return 1;
+    }
+    if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
+        fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
+                filter_name, filter_args);
+        return 1;
+    }
+
+    /* create a link for each of the input pads */
+    for (i = 0; i < filter_ctx->input_count; i++) {
+        AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
+        link->type = filter_ctx->filter->inputs[i].type;
+        filter_ctx->inputs[i] = link;
+    }
+    for (i = 0; i < filter_ctx->output_count; i++) {
+        AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
+        link->type = filter_ctx->filter->outputs[i].type;
+        filter_ctx->outputs[i] = link;
+    }
+
+    if (filter->query_formats)
+        filter->query_formats(filter_ctx);
+    else
+        ff_default_query_formats(filter_ctx);
+
+    /* print the supported formats in input */
+    for (i = 0; i < filter_ctx->input_count; i++) {
+        AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
+        for (j = 0; j < fmts->format_count; j++)
+            printf("INPUT[%d] %s: %s\n",
+                   i, filter_ctx->filter->inputs[i].name,
+                   av_pix_fmt_descriptors[fmts->formats[j]].name);
+    }
+
+    /* print the supported formats in output */
+    for (i = 0; i < filter_ctx->output_count; i++) {
+        AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
+        for (j = 0; j < fmts->format_count; j++)
+            printf("OUTPUT[%d] %s: %s\n",
+                   i, filter_ctx->filter->outputs[i].name,
+                   av_pix_fmt_descriptors[fmts->formats[j]].name);
+    }
+
+    avfilter_free(filter_ctx);
+    fflush(stdout);
+    return 0;
+}