jpegparse: Rewrite element.

Now it uses the JPEG parser in libgstcodecparsers, while the whole
code is simplified by relying more in baseparser class for tag
handling.

The element now signals chroma-format and default framerate is 0/1,
which is for still-images.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1473>

subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json

@@ -29620,7 +29620,7 @@
                 "rank": "secondary"
             },
             "jpegparse": {
-                "author": "Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>",
+                "author": "Víctor Jáquez <vjaquez@igalia.com>",
                 "description": "Parse JPEG images into single-frame buffers",
                 "hierarchy": [
                     "GstJpegParse",
@@ -29630,7 +29630,7 @@
                     "GInitiallyUnowned",
                     "GObject"
                 ],
-                "klass": "Video/Parser",
+                "klass": "Codec/Parser/Image",
                 "long-name": "JPEG stream parser",
                 "pad-templates": {
                     "sink": {
@@ -29639,7 +29639,7 @@
                         "presence": "always"
                     },
                     "src": {
-                        "caps": "image/jpeg:\n         format: { I420, Y41B, UYVY, YV12 }\n          width: [ 0, 2147483647 ]\n         height: [ 0, 2147483647 ]\n      framerate: [ 0/1, 2147483647/1 ]\n         parsed: true\n",
+                        "caps": "image/jpeg:\n      framerate: [ 0/1, 2147483647/1 ]\n         parsed: true\n",
                         "direction": "src",
                         "presence": "always"
                     }

subprojects/gst-plugins-bad/gst/jpegformat/gstjpegparse.h

@@ -3,6 +3,7 @@
  * jpegparse: a parser for JPEG streams
  *
  * Copyright (C) <2009> Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
+ *               <2022> Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -47,30 +48,22 @@ struct _GstJpegParse {
   GstBaseParse parse;
 
   guint last_offset;
-  guint last_entropy_len;
+  gint state;
-  gboolean last_resync;
 
-  /* negotiated state */
+  gint8 sof;
-  gint caps_width, caps_height;
+  gint8 adobe_transform;
-  gint caps_framerate_numerator;
-  gint caps_framerate_denominator;
 
   /* the parsed frame size */
   guint16 width, height;
 
   /* format color space */
-  const gchar *format;
+  guint colorspace;
+  guint sampling;
+  guint16 x_density;
+  guint16 y_density;
+  GstCaps *prev_caps;
 
-  /* TRUE if the src caps sets a specific framerate */
+  /* fps */
-  gboolean has_fps;
-
-  /* the (expected) timestamp of the next frame */
-  guint64 next_ts;
-
-  /* duration of the current frame */
-  guint64 duration;
-
-  /* video state */
   gint framerate_numerator;
   gint framerate_denominator;
 

subprojects/gst-plugins-bad/gst/jpegformat/meson.build

@@ -8,7 +8,7 @@ gstjpegformat = library('gstjpegformat',
   jpegf_sources,
   c_args : gst_plugins_bad_args + [ '-DGST_USE_UNSTABLE_API' ],
   include_directories : [configinc],
-  dependencies : [gstbase_dep, gstcodecparsers_dep, gsttag_dep],
+  dependencies : [gstbase_dep, gstcodecparsers_dep, gstvideo_dep, gsttag_dep],
   install : true,
   install_dir : plugins_install_dir,
 )

subprojects/gst-plugins-bad/tests/check/elements/jpegparse.c

@@ -192,7 +192,7 @@ GST_START_TEST (test_parse_single_byte)
   caps_in = gst_caps_new_simple ("image/jpeg", "parsed", G_TYPE_BOOLEAN, FALSE,
       NULL);
   caps_out = gst_caps_new_simple ("image/jpeg", "parsed", G_TYPE_BOOLEAN, TRUE,
-      "framerate", GST_TYPE_FRACTION, 1, 1, NULL);
+      "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
 
   /* Push the data byte by byte, injecting some garbage. */
   buffer_in = make_buffers_in (buffer_in, test_data_garbage);
@@ -262,7 +262,7 @@ GST_START_TEST (test_parse_all_in_one_buf)
   buffer_in = g_list_append (buffer_in, buffer);
 
   caps_out = gst_caps_new_simple ("image/jpeg", "parsed", G_TYPE_BOOLEAN, TRUE,
-      "framerate", GST_TYPE_FRACTION, 1, 1, NULL);
+      "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
   buffer_out = make_buffers_out (buffer_out, test_data_short_frame);
   buffer_out = make_buffers_out (buffer_out, test_data_normal_frame);
   buffer_out = make_buffers_out (buffer_out, test_data_entropy);
@@ -326,8 +326,9 @@ GST_START_TEST (test_parse_app1_exif)
       G_TYPE_BOOLEAN, FALSE, NULL);
 
   caps_out = gst_caps_new_simple ("image/jpeg", "parsed", G_TYPE_BOOLEAN, TRUE,
-      "framerate", GST_TYPE_FRACTION, 1, 1, "format", G_TYPE_STRING,
+      "framerate", GST_TYPE_FRACTION, 0, 1, "width", G_TYPE_INT, 80, "height",
-      "I420", "width", G_TYPE_INT, 80, "height", G_TYPE_INT, 60, NULL);
+      G_TYPE_INT, 60, "sof-marker", G_TYPE_INT, 0, "colorspace", G_TYPE_STRING,
+      "sYUV", "sampling", G_TYPE_STRING, "YCbCr-4:2:0", NULL);
 
   buffer_in = make_my_input_buffer (test_data_app1_exif,
       sizeof (test_data_app1_exif));
@@ -351,8 +352,9 @@ GST_START_TEST (test_parse_comment)
       G_TYPE_BOOLEAN, FALSE, NULL);
 
   caps_out = gst_caps_new_simple ("image/jpeg", "parsed", G_TYPE_BOOLEAN, TRUE,
-      "framerate", GST_TYPE_FRACTION, 1, 1, "format", G_TYPE_STRING,
+      "framerate", GST_TYPE_FRACTION, 0, 1, "width", G_TYPE_INT, 80, "height",
-      "I420", "width", G_TYPE_INT, 80, "height", G_TYPE_INT, 60, NULL);
+      G_TYPE_INT, 60, "sof-marker", G_TYPE_INT, 0, "colorspace", G_TYPE_STRING,
+      "sYUV", "sampling", G_TYPE_STRING, "YCbCr-4:2:0", NULL);
 
   buffer_in = make_my_input_buffer (test_data_comment,
       sizeof (test_data_comment));