lavf/img2dec: add option to disable pattern matching

Signed-off-by: Marton Balint <cus@passwd.hu>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/demuxers.texi

@@ -258,6 +258,10 @@ Select the pattern type used to interpret the provided filename.
 
 @var{pattern_type} accepts one of the following values.
 @table @option
+@item none
+Disable pattern matching, therefore the video will only contain the specified
+image. You should use this option if you do not want to create sequences from
+multiple images and your filenames may contain special pattern characters.
 @item sequence
 Select a sequence pattern type, used to specify a sequence of files
 indexed by sequential numbers.

libavformat/img2.h

@@ -33,7 +33,8 @@
 enum PatternType {
     PT_GLOB_SEQUENCE,
     PT_GLOB,
-    PT_SEQUENCE
+    PT_SEQUENCE,
+    PT_NONE
 };
 
 typedef struct VideoDemuxData {

libavformat/img2dec.c

@@ -177,7 +177,7 @@ static int img_read_probe(AVProbeData *p)
 int ff_img_read_header(AVFormatContext *s1)
 {
     VideoDemuxData *s = s1->priv_data;
-    int first_index, last_index;
+    int first_index = 1, last_index = 1;
     AVStream *st;
     enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
 
@@ -282,7 +282,7 @@ int ff_img_read_header(AVFormatContext *s1)
                    "is not supported by this libavformat build\n");
             return AVERROR(ENOSYS);
 #endif
-        } else if (s->pattern_type != PT_GLOB_SEQUENCE) {
+        } else if (s->pattern_type != PT_GLOB_SEQUENCE && s->pattern_type != PT_NONE) {
             av_log(s1, AV_LOG_ERROR,
                    "Unknown value '%d' for pattern_type option\n", s->pattern_type);
             return AVERROR(EINVAL);
@@ -377,7 +377,9 @@ int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
         }
         if (s->img_number > s->img_last)
             return AVERROR_EOF;
-        if (s->use_glob) {
+        if (s->pattern_type == PT_NONE) {
+            av_strlcpy(filename_bytes, s->path, sizeof(filename_bytes));
+        } else if (s->use_glob) {
 #if HAVE_GLOB
             filename = s->globstate.gl_pathv[s->img_number];
 #endif
@@ -538,6 +540,7 @@ const AVOption ff_img_options[] = {
     { "glob_sequence","select glob/sequence pattern type",   0, AV_OPT_TYPE_CONST,  {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
     { "glob",         "select glob pattern type",            0, AV_OPT_TYPE_CONST,  {.i64=PT_GLOB         }, INT_MIN, INT_MAX, DEC, "pattern_type" },
     { "sequence",     "select sequence pattern type",        0, AV_OPT_TYPE_CONST,  {.i64=PT_SEQUENCE     }, INT_MIN, INT_MAX, DEC, "pattern_type" },
+    { "none",         "disable pattern matching",            0, AV_OPT_TYPE_CONST,  {.i64=PT_NONE         }, INT_MIN, INT_MAX, DEC, "pattern_type" },
 
     { "pixel_format", "set video pixel format",              OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0,       DEC },
     { "start_number", "set first number in the sequence",    OFFSET(start_number), AV_OPT_TYPE_INT,    {.i64 = 0   }, INT_MIN, INT_MAX, DEC },

libavformat/version.h

@@ -31,7 +31,7 @@
 
 #define LIBAVFORMAT_VERSION_MAJOR 56
 #define LIBAVFORMAT_VERSION_MINOR  33
-#define LIBAVFORMAT_VERSION_MICRO 100
+#define LIBAVFORMAT_VERSION_MICRO 101
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \