[FFmpeg-devel] [PATCH]Autodetect jpeg2000 images

[Carl Eugen Hoyos]

Hi!

Attached patch allows auto-detection of jpeg2000 images.

Please comment, Carl Eugen
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diff --git a/libavformat/Makefile b/libavformat/Makefile
index b42c823..4b6d54f 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -190,6 +190,7 @@ OBJS-$(CONFIG_IMAGE2_BRENDER_PIX_DEMUXER) += img2_brender_pix.o
 OBJS-$(CONFIG_IMAGE_BMP_PIPE_DEMUXER)     += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_DPX_PIPE_DEMUXER)     += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_EXR_PIPE_DEMUXER)     += img2dec.o img2.o
+OBJS-$(CONFIG_IMAGE_J2K_PIPE_DEMUXER)     += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_PICTOR_PIPE_DEMUXER)  += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_PNG_PIPE_DEMUXER)     += img2dec.o img2.o
 OBJS-$(CONFIG_IMAGE_SGI_PIPE_DEMUXER)     += img2dec.o img2.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index dbde432..c07fbd1 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -322,6 +322,7 @@ void av_register_all(void)
     REGISTER_DEMUXER (IMAGE_BMP_PIPE,        image_bmp_pipe);
     REGISTER_DEMUXER (IMAGE_DPX_PIPE,        image_dpx_pipe);
     REGISTER_DEMUXER (IMAGE_EXR_PIPE,        image_exr_pipe);
+    REGISTER_DEMUXER (IMAGE_J2K_PIPE,        image_j2k_pipe);
     REGISTER_DEMUXER (IMAGE_PICTOR_PIPE,     image_pictor_pipe);
     REGISTER_DEMUXER (IMAGE_PNG_PIPE,        image_png_pipe);
     REGISTER_DEMUXER (IMAGE_SGI_PIPE,        image_sgi_pipe);
diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index a8f87ef..e795842 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -583,6 +583,16 @@ static int exr_probe(AVProbeData *p)
     return 0;
 }
 
+static int j2k_probe(AVProbeData *p)
+{
+    const uint8_t *b = p->buf;
+
+    if (AV_RB64(b) == 0x0000000c6a502020 ||
+        AV_RB32(b) == 0xff4fff51)
+        return AVPROBE_SCORE_EXTENSION + 1;
+    return 0;
+}
+
 static int pictor_probe(AVProbeData *p)
 {
     const uint8_t *b = p->buf;
@@ -653,6 +663,7 @@ AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
 IMAGEAUTO_DEMUXER(bmp,     AV_CODEC_ID_BMP)
 IMAGEAUTO_DEMUXER(dpx,     AV_CODEC_ID_DPX)
 IMAGEAUTO_DEMUXER(exr,     AV_CODEC_ID_EXR)
+IMAGEAUTO_DEMUXER(j2k,     AV_CODEC_ID_JPEG2000)
 IMAGEAUTO_DEMUXER(pictor,  AV_CODEC_ID_PICTOR)
 IMAGEAUTO_DEMUXER(png,     AV_CODEC_ID_PNG)
 IMAGEAUTO_DEMUXER(sgi,     AV_CODEC_ID_SGI)