Autodetect webp files.

libavformat/Makefile

@@ -197,6 +197,7 @@ OBJS-$(CONFIG_IMAGE_PNG_PIPE_DEMUXER)     += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_SGI_PIPE_DEMUXER)     += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_SUNRAST_PIPE_DEMUXER) += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_TIFF_PIPE_DEMUXER)    += img2dec.o img2.o
+OBJS-$(CONFIG_IMAGE_WEBP_PIPE_DEMUXER)    += img2dec.o img2.o
 OBJS-$(CONFIG_INGENIENT_DEMUXER)         += ingenientdec.o rawdec.o
 OBJS-$(CONFIG_IPMOVIE_DEMUXER)           += ipmovie.o
 OBJS-$(CONFIG_IRCAM_DEMUXER)             += ircamdec.o ircam.o pcm.o

libavformat/allformats.c

@@ -330,6 +330,7 @@ void av_register_all(void)
     REGISTER_DEMUXER (IMAGE_SGI_PIPE,        image_sgi_pipe);
     REGISTER_DEMUXER (IMAGE_SUNRAST_PIPE,    image_sunrast_pipe);
     REGISTER_DEMUXER (IMAGE_TIFF_PIPE,       image_tiff_pipe);
+    REGISTER_DEMUXER (IMAGE_WEBP_PIPE,       image_webp_pipe);
 
 
     /* protocols */

libavformat/img2dec.c

@@ -658,6 +658,16 @@ static int tiff_probe(AVProbeData *p)
     return 0;
 }
 
+static int webp_probe(AVProbeData *p)
+{
+    const uint8_t *b = p->buf;
+
+    if (AV_RB32(b)     == 0x52494646 &&
+        AV_RB32(b + 8) == 0x57454250)
+        return AVPROBE_SCORE_MAX - 1;
+    return 0;
+}
+
 #define IMAGEAUTO_DEMUXER(imgname, codecid)\
 static const AVClass imgname ## _class = {\
     .class_name = AV_STRINGIFY(imgname) " demuxer",\
@@ -685,3 +695,4 @@ IMAGEAUTO_DEMUXER(png,     AV_CODEC_ID_PNG)
 IMAGEAUTO_DEMUXER(sgi,     AV_CODEC_ID_SGI)
 IMAGEAUTO_DEMUXER(sunrast, AV_CODEC_ID_SUNRAST)
 IMAGEAUTO_DEMUXER(tiff,    AV_CODEC_ID_TIFF)
+IMAGEAUTO_DEMUXER(webp,    AV_CODEC_ID_WEBP)

libavformat/version.h

@@ -31,7 +31,7 @@
 
 #define LIBAVFORMAT_VERSION_MAJOR 55
 
-#define LIBAVFORMAT_VERSION_MINOR 53
+#define LIBAVFORMAT_VERSION_MINOR 54
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \