lavf: rename ff_probe_input_buffer to make it public

It is useful for applications that hand input data directly to lavf via
a ByteIOContext.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 3940caad02)

doc/APIchanges

@@ -13,6 +13,10 @@ libavutil:   2009-03-08
 
 API changes, most recent first:
 
+2011-02-08 - xxxxxxx - lavf 52.98.0 - av_probe_input_buffer
+  Add av_probe_input_buffer() to avformat.h for probing format from a
+  ByteIOContext.
+
 2011-02-06 - fe174fc - lavf 52.97.0 - avio.h
   Add flag for non-blocking protocols: URL_FLAG_NONBLOCK
 

libavformat/avformat.h

@@ -1040,6 +1040,25 @@ AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
  */
 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max);
 
+/**
+ * Probe a bytestream to determine the input format. Each time a probe returns
+ * with a score that is too low, the probe buffer size is increased and another
+ * attempt is made. When the maximum probe size is reached, the input format
+ * with the highest score is returned.
+ *
+ * @param pb the bytestream to probe
+ * @param fmt the input format is put here
+ * @param filename the filename of the stream
+ * @param logctx the log context
+ * @param offset the offset within the bytestream to probe from
+ * @param max_probe_size the maximum probe buffer size (zero for default)
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_probe_input_buffer(ByteIOContext *pb, AVInputFormat **fmt,
+                          const char *filename, void *logctx,
+                          unsigned int offset, unsigned int max_probe_size);
+
 /**
  * Allocate all the structures needed to read an input stream.
  *        This does not open the needed codecs for decoding the stream[s].

libavformat/internal.h

@@ -82,25 +82,6 @@ void ff_read_frame_flush(AVFormatContext *s);
 /** Get the current time since NTP epoch in microseconds. */
 uint64_t ff_ntp_time(void);
 
-/**
- * Probe a bytestream to determine the input format. Each time a probe returns
- * with a score that is too low, the probe buffer size is increased and another
- * attempt is made. When the maximum probe size is reached, the input format
- * with the highest score is returned.
- *
- * @param pb the bytestream to probe
- * @param fmt the input format is put here
- * @param filename the filename of the stream
- * @param logctx the log context
- * @param offset the offset within the bytestream to probe from
- * @param max_probe_size the maximum probe buffer size (zero for default)
- * @return 0 in case of success, a negative value corresponding to an
- * AVERROR code otherwise
- */
-int ff_probe_input_buffer(ByteIOContext *pb, AVInputFormat **fmt,
-                          const char *filename, void *logctx,
-                          unsigned int offset, unsigned int max_probe_size);
-
 #if FF_API_URL_SPLIT
 /**
  * @deprecated use av_url_split() instead

libavformat/utils.c

@@ -524,7 +524,7 @@ int av_open_input_stream(AVFormatContext **ic_ptr,
 #define PROBE_BUF_MIN 2048
 #define PROBE_BUF_MAX (1<<20)
 
-int ff_probe_input_buffer(ByteIOContext *pb, AVInputFormat **fmt,
+int av_probe_input_buffer(ByteIOContext *pb, AVInputFormat **fmt,
                           const char *filename, void *logctx,
                           unsigned int offset, unsigned int max_probe_size)
 {
@@ -622,7 +622,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
         if (buf_size > 0) {
             url_setbufsize(pb, buf_size);
         }
-        if (!fmt && (err = ff_probe_input_buffer(pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
+        if (!fmt && (err = av_probe_input_buffer(pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
             goto fail;
         }
     }

libavformat/version.h

@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 97
+#define LIBAVFORMAT_VERSION_MINOR 98
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \