ext/jpeg/: Added a new simple jpeg based codec

Original commit message from CVS:
* ext/jpeg/Makefile.am:
* ext/jpeg/README:
* ext/jpeg/gstjpeg.c: (plugin_init):
* ext/jpeg/gstsmokedec.c: (gst_smokedec_get_type),
(gst_smokedec_base_init), (gst_smokedec_class_init),
(gst_smokedec_init), (gst_smokedec_link), (gst_smokedec_chain):
* ext/jpeg/gstsmokedec.h:
* ext/jpeg/gstsmokeenc.c: (gst_smokeenc_get_type),
(gst_smokeenc_base_init), (gst_smokeenc_class_init),
(gst_smokeenc_init), (gst_smokeenc_getcaps), (gst_smokeenc_link),
(gst_smokeenc_resync), (gst_smokeenc_chain),
(gst_smokeenc_set_property), (gst_smokeenc_get_property):
* ext/jpeg/gstsmokeenc.h:
* ext/jpeg/smokecodec.c: (smokecodec_init_destination),
(smokecodec_flush_destination), (smokecodec_term_destination),
(smokecodec_init_source), (smokecodec_fill_input_buffer),
(smokecodec_skip_input_data), (smokecodec_resync_to_restart),
(smokecodec_term_source), (smokecodec_encode_new),
(smokecodec_decode_new), (smokecodec_info_free),
(smokecodec_set_quality), (smokecodec_get_quality),
(smokecodec_set_threshold), (smokecodec_get_threshold),
(smokecodec_set_bitrate), (smokecodec_get_bitrate),
(find_best_size), (abs_diff), (put), (smokecodec_encode),
(smokecodec_parse_header), (smokecodec_decode):
* ext/jpeg/smokecodec.h:
Added a new simple jpeg based codec

1 files changed, 237 insertions, 0 deletions

diff --git a/ext/jpeg/gstsmokedec.c b/ext/jpeg/gstsmokedec.c
new file mode 100644
index 00000000..34a86785
--- /dev/null
+++ b/ext/jpeg/gstsmokedec.c
@@ -0,0 +1,237 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <string.h>
+
+/*#define DEBUG_ENABLED*/
+#include "gstsmokedec.h"
+#include <gst/video/video.h>
+
+/* elementfactory information */
+GstElementDetails gst_smokedec_details = {
+  "Smoke image decoder",
+  "Codec/Decoder/Image",
+  "Decode images from Smoke format",
+  "Wim Taymans <wim@fluendo.com>",
+};
+
+GST_DEBUG_CATEGORY (smokedec_debug);
+#define GST_CAT_DEFAULT smokedec_debug
+
+/* SmokeDec signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0
+      /* FILL ME */
+};
+
+static void gst_smokedec_base_init (gpointer g_class);
+static void gst_smokedec_class_init (GstSmokeDec * klass);
+static void gst_smokedec_init (GstSmokeDec * smokedec);
+
+static void gst_smokedec_chain (GstPad * pad, GstData * _data);
+static GstPadLinkReturn gst_smokedec_link (GstPad * pad, const GstCaps * caps);
+
+static GstElementClass *parent_class = NULL;
+
+/*static guint gst_smokedec_signals[LAST_SIGNAL] = { 0 }; */
+
+GType
+gst_smokedec_get_type (void)
+{
+  static GType smokedec_type = 0;
+
+  if (!smokedec_type) {
+    static const GTypeInfo smokedec_info = {
+      sizeof (GstSmokeDecClass),
+      gst_smokedec_base_init,
+      NULL,
+      (GClassInitFunc) gst_smokedec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstSmokeDec),
+      0,
+      (GInstanceInitFunc) gst_smokedec_init,
+    };
+
+    smokedec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstSmokeDec", &smokedec_info,
+        0);
+  }
+  return smokedec_type;
+}
+
+static GstStaticPadTemplate gst_smokedec_src_pad_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
+    );
+
+static GstStaticPadTemplate gst_smokedec_sink_pad_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("image/x-smoke, "
+        "width = (int) [ 16, 4096 ], "
+        "height = (int) [ 16, 4096 ], " "framerate = (double) [ 1, MAX ]")
+    );
+
+static void
+gst_smokedec_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_smokedec_src_pad_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_smokedec_sink_pad_template));
+  gst_element_class_set_details (element_class, &gst_smokedec_details);
+}
+
+static void
+gst_smokedec_class_init (GstSmokeDec * klass)
+{
+  GstElementClass *gstelement_class;
+
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  GST_DEBUG_CATEGORY_INIT (smokedec_debug, "smokedec", 0, "Smoke decoder");
+}
+
+static void
+gst_smokedec_init (GstSmokeDec * smokedec)
+{
+  GST_DEBUG ("gst_smokedec_init: initializing");
+  /* create the sink and src pads */
+
+  smokedec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_smokedec_sink_pad_template), "sink");
+  gst_element_add_pad (GST_ELEMENT (smokedec), smokedec->sinkpad);
+  gst_pad_set_chain_function (smokedec->sinkpad, gst_smokedec_chain);
+  gst_pad_set_link_function (smokedec->sinkpad, gst_smokedec_link);
+
+  smokedec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_smokedec_src_pad_template), "src");
+  gst_pad_use_explicit_caps (smokedec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (smokedec), smokedec->srcpad);
+
+  /* reset the initial video state */
+  smokedec->format = -1;
+  smokedec->width = -1;
+  smokedec->height = -1;
+}
+
+static GstPadLinkReturn
+gst_smokedec_link (GstPad * pad, const GstCaps * caps)
+{
+  GstSmokeDec *smokedec = GST_SMOKEDEC (gst_pad_get_parent (pad));
+  GstStructure *structure;
+  GstCaps *srccaps;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  gst_structure_get_double (structure, "framerate", &smokedec->fps);
+  gst_structure_get_int (structure, "width", &smokedec->width);
+  gst_structure_get_int (structure, "height", &smokedec->height);
+
+  srccaps = gst_caps_new_simple ("video/x-raw-yuv",
+      "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'),
+      "width", G_TYPE_INT, smokedec->width,
+      "height", G_TYPE_INT, smokedec->height,
+      "framerate", G_TYPE_DOUBLE, smokedec->fps, NULL);
+
+  /* at this point, we're pretty sure that this will be the output
+   * format, so we'll set it. */
+  gst_pad_set_explicit_caps (smokedec->srcpad, srccaps);
+
+  smokecodec_decode_new (&smokedec->info);
+
+  return GST_PAD_LINK_OK;
+}
+
+static void
+gst_smokedec_chain (GstPad * pad, GstData * _data)
+{
+  GstBuffer *buf = GST_BUFFER (_data);
+  GstSmokeDec *smokedec;
+  guchar *data, *outdata;
+  gulong size, outsize;
+  GstBuffer *outbuf;
+  SmokeCodecFlags flags;
+
+  /*GstMeta *meta; */
+  gint width, height;
+
+  smokedec = GST_SMOKEDEC (GST_OBJECT_PARENT (pad));
+
+  if (!GST_PAD_IS_LINKED (smokedec->srcpad)) {
+    gst_buffer_unref (buf);
+    return;
+  }
+
+  data = (guchar *) GST_BUFFER_DATA (buf);
+  size = GST_BUFFER_SIZE (buf);
+  GST_DEBUG ("gst_smokedec_chain: got buffer of %ld bytes in '%s'", size,
+      GST_OBJECT_NAME (smokedec));
+
+  GST_DEBUG ("gst_smokedec_chain: reading header %08lx", *(gulong *) data);
+  smokecodec_parse_header (smokedec->info, data, size, &flags, &width, &height);
+
+  outbuf = gst_buffer_new ();
+  outsize = GST_BUFFER_SIZE (outbuf) = width * height + width * height / 2;
+  outdata = GST_BUFFER_DATA (outbuf) = g_malloc (outsize);
+  GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+  GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
+
+  if (smokedec->height != height) {
+    GstCaps *caps;
+
+    smokedec->height = height;
+
+    caps = gst_caps_new_simple ("video/x-raw-yuv",
+        "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'),
+        "width", G_TYPE_INT, width,
+        "height", G_TYPE_INT, height,
+        "framerate", G_TYPE_DOUBLE, smokedec->fps, NULL);
+    gst_pad_set_explicit_caps (smokedec->srcpad, caps);
+    gst_caps_free (caps);
+  }
+
+  smokecodec_decode (smokedec->info, data, size, outdata);
+
+  GST_DEBUG ("gst_smokedec_chain: sending buffer");
+  gst_pad_push (smokedec->srcpad, GST_DATA (outbuf));
+
+  gst_buffer_unref (buf);
+}