error: remove AVERROR_NUMEXPECTED

AVERROR_NUMEXPECTED is used only in the image muxer and demuxer, and
has a too much specific meaning, which is better explained through a
log message. Thus it can be replaced by AVERROR(EINVAL).

This breaks API.
Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

ffmpeg.c

@@ -3722,7 +3722,7 @@ static void opt_output_file(const char *filename)
     /* check filename in case of an image number is expected */
     if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
         if (!av_filename_number_test(oc->filename)) {
-            print_error(oc->filename, AVERROR_NUMEXPECTED);
+            print_error(oc->filename, AVERROR(EINVAL));
             ffmpeg_exit(1);
         }
     }

libavformat/utils.c

@@ -581,7 +581,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
     /* check filename in case an image number is expected */
     if (fmt->flags & AVFMT_NEEDNUMBER) {
         if (!av_filename_number_test(filename)) {
-            err = AVERROR_NUMEXPECTED;
+            err = AVERROR(EINVAL);
             goto fail;
         }
     }

libavutil/error.c

@@ -27,7 +27,6 @@ int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
     switch (errnum) {
     case AVERROR_EOF:               errstr = "End of file"; break;
     case AVERROR_INVALIDDATA:       errstr = "Invalid data found when processing input"; break;
-    case AVERROR_NUMEXPECTED:       errstr = "Number syntax expected in filename"; break;
     case AVERROR_PATCHWELCOME:      errstr = "Not yet implemented in Libav, patches welcome"; break;
     case AVERROR_DEMUXER_NOT_FOUND: errstr = "Demuxer not found"; break;
     case AVERROR_MUXER_NOT_FOUND:   errstr = "Muxer not found"; break;

libavutil/error.h

@@ -42,7 +42,6 @@
 #define AVERROR_PATCHWELCOME    (-MKTAG('P','A','W','E')) ///< Not yet implemented in Libav, patches welcome
 
 #define AVERROR_INVALIDDATA     (-MKTAG('I','N','D','A')) ///< Invalid data found when processing input
-#define AVERROR_NUMEXPECTED     (-MKTAG('N','U','E','X')) ///< Number syntax expected in filename
 
 #define AVERROR_DEMUXER_NOT_FOUND  (-MKTAG(0xF8,'D','E','M')) ///< Demuxer not found
 #define AVERROR_MUXER_NOT_FOUND    (-MKTAG(0xF8,'M','U','X')) ///< Muxer not found