libavfilter: add ff_parse_time_base()

Michael Niedermayer committed 14 years ago

Commit 34484041 parent 6579bc42 files · +22 −0Browse files

Unified · Split

2 files

 #include "libavutil/eval.h"
 #include "libavutil/pixdesc.h"
+#include "libavutil/parseutils.h"
 #include "libavutil/audioconvert.h"
 #include "avfilter.h"
 #include "internal.h"
     return 0;
 }
+int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx)
+{
+    AVRational r;
+    if(av_parse_ratio(&r, arg, INT_MAX, 0, log_ctx) < 0 ||r.num<=0  ||r.den<=0) {
+        av_log(log_ctx, AV_LOG_ERROR, "Invalid time base '%s'\n", arg);
+        return AVERROR(EINVAL);
+    }
+    *ret = r;
+    return 0;
+}
 int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
 {
     char *tail;

@@ -111,6 +111,16 @@ int ff_parse_pixel_format(enum PixelFormat ret, const char arg, void *log_ctx) · 110 unmodified lines
111	*/	111	*/
112	int ff_parse_sample_rate(int ret, const char arg, void *log_ctx);	112	int ff_parse_sample_rate(int ret, const char arg, void *log_ctx);
113		113
		114	/**
		115	* Parse a time base.
		116	*
		117	* @param ret unsigned AVRational pointer to where the value should be written
		118	* @param arg string to parse
		119	* @param log_ctx log context
		120	* @return 0 in case of success, a negative AVERROR code on error
		121	*/
		122	int ff_parse_time_base(AVRational ret, const char arg, void *log_ctx);
		123
114	/**	124	/**
115	* Parse a sample format name or a corresponding integer representation.	125	* Parse a sample format name or a corresponding integer representation.
116	*	126	*

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