fftools/textformat: Extract and generalize textformat api from ffprobe.c

Signed-off-by: softworkz <softworkz@hotmail.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/fftools/textformat/tw_stdout.c b/fftools/textformat/tw_stdout.c
new file mode 100644
index 0000000000..23de6f671f
--- /dev/null
+++ b/fftools/textformat/tw_stdout.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) The FFmpeg developers
+ *
+ * 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
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "avtextwriters.h"
+#include "libavutil/opt.h"
+
+/* STDOUT Writer */
+
+# define WRITER_NAME "stdoutwriter"
+
+typedef struct StdOutWriterContext {
+    const AVClass *class;
+} StdOutWriterContext;
+
+static const char *stdoutwriter_get_name(void *ctx)
+{
+    return WRITER_NAME;
+}
+
+static const AVClass stdoutwriter_class = {
+    .class_name = WRITER_NAME,
+    .item_name = stdoutwriter_get_name,
+};
+
+static inline void stdout_w8(AVTextWriterContext *wctx, int b)
+{
+    printf("%c", b);
+}
+
+static inline void stdout_put_str(AVTextWriterContext *wctx, const char *str)
+{
+    printf("%s", str);
+}
+
+static inline void stdout_printf(AVTextWriterContext *wctx, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    vprintf(fmt, ap);
+    va_end(ap);
+}
+
+
+static const AVTextWriter avtextwriter_stdout = {
+    .name                 = WRITER_NAME,
+    .priv_size            = sizeof(StdOutWriterContext),
+    .priv_class           = &stdoutwriter_class,
+    .writer_put_str       = stdout_put_str,
+    .writer_printf        = stdout_printf,
+    .writer_w8            = stdout_w8
+};
+
+int avtextwriter_create_stdout(AVTextWriterContext **pwctx)
+{
+    int ret;
+
+    ret = avtextwriter_context_open(pwctx, &avtextwriter_stdout);
+
+    return ret;
+}