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, 373 insertions, 0 deletions

diff --git a/ext/jpeg/gstsmokeenc.c b/ext/jpeg/gstsmokeenc.c
new file mode 100644
index 00000000..8776b6fd
--- /dev/null
+++ b/ext/jpeg/gstsmokeenc.c
@@ -0,0 +1,373 @@
+/* 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>
+
+#include "gstsmokeenc.h"
+#include <gst/video/video.h>
+
+/* elementfactory information */
+GstElementDetails gst_smokeenc_details = {
+  "Smoke image encoder",
+  "Codec/Encoder/Image",
+  "Encode images in the Smoke format",
+  "Wim Taymans <wim@fluendo.com>",
+};
+
+GST_DEBUG_CATEGORY (smokeenc_debug);
+#define GST_CAT_DEFAULT smokeenc_debug
+
+#define SMOKEENC_DEFAULT_MIN_QUALITY 10
+#define SMOKEENC_DEFAULT_MAX_QUALITY 85
+#define SMOKEENC_DEFAULT_THRESHOLD 3000
+#define SMOKEENC_DEFAULT_KEYFRAME 20
+
+/* SmokeEnc signals and args */
+enum
+{
+  FRAME_ENCODED,
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_MIN_QUALITY,
+  ARG_MAX_QUALITY,
+  ARG_THRESHOLD,
+  ARG_KEYFRAME
+      /* FILL ME */
+};
+
+static void gst_smokeenc_base_init (gpointer g_class);
+static void gst_smokeenc_class_init (GstSmokeEnc * klass);
+static void gst_smokeenc_init (GstSmokeEnc * smokeenc);
+
+static void gst_smokeenc_chain (GstPad * pad, GstData * _data);
+static GstPadLinkReturn gst_smokeenc_link (GstPad * pad, const GstCaps * caps);
+static GstCaps *gst_smokeenc_getcaps (GstPad * pad);
+
+static void gst_smokeenc_resync (GstSmokeEnc * smokeenc);
+static void gst_smokeenc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_smokeenc_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstElementClass *parent_class = NULL;
+
+//static guint gst_smokeenc_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_smokeenc_get_type (void)
+{
+  static GType smokeenc_type = 0;
+
+  if (!smokeenc_type) {
+    static const GTypeInfo smokeenc_info = {
+      sizeof (GstSmokeEncClass),
+      gst_smokeenc_base_init,
+      NULL,
+      (GClassInitFunc) gst_smokeenc_class_init,
+      NULL,
+      NULL,
+      sizeof (GstSmokeEnc),
+      0,
+      (GInstanceInitFunc) gst_smokeenc_init,
+    };
+
+    smokeenc_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstSmokeEnc", &smokeenc_info,
+        0);
+  }
+  return smokeenc_type;
+}
+
+static GstStaticPadTemplate gst_smokeenc_sink_pad_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
+    );
+
+static GstStaticPadTemplate gst_smokeenc_src_pad_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("image/x-smoke, "
+        "width = (int) [ 16, 4096 ], "
+        "height = (int) [ 16, 4096 ], " "framerate = (double) [ 1, MAX ]")
+    );
+
+static void
+gst_smokeenc_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_smokeenc_sink_pad_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_smokeenc_src_pad_template));
+  gst_element_class_set_details (element_class, &gst_smokeenc_details);
+}
+
+static void
+gst_smokeenc_class_init (GstSmokeEnc * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  g_object_class_install_property (gobject_class, ARG_MIN_QUALITY,
+      g_param_spec_int ("qmin", "Qmin", "Minimum quality",
+          0, 100, SMOKEENC_DEFAULT_MIN_QUALITY, G_PARAM_READWRITE));
+  g_object_class_install_property (gobject_class, ARG_MAX_QUALITY,
+      g_param_spec_int ("qmax", "Qmax", "Maximum quality",
+          0, 100, SMOKEENC_DEFAULT_MAX_QUALITY, G_PARAM_READWRITE));
+  g_object_class_install_property (gobject_class, ARG_THRESHOLD,
+      g_param_spec_int ("threshold", "Threshold", "Motion estimation threshold",
+          0, 100000000, SMOKEENC_DEFAULT_THRESHOLD, G_PARAM_READWRITE));
+  g_object_class_install_property (gobject_class, ARG_KEYFRAME,
+      g_param_spec_int ("keyframe", "Keyframe",
+          "Insert keyframe every N frames", 1, 100000,
+          SMOKEENC_DEFAULT_KEYFRAME, G_PARAM_READWRITE));
+
+  gobject_class->set_property = gst_smokeenc_set_property;
+  gobject_class->get_property = gst_smokeenc_get_property;
+
+  GST_DEBUG_CATEGORY_INIT (smokeenc_debug, "smokeenc", 0,
+      "Smoke encoding element");
+}
+
+static void
+gst_smokeenc_init (GstSmokeEnc * smokeenc)
+{
+  /* create the sink and src pads */
+  smokeenc->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_smokeenc_sink_pad_template), "sink");
+  gst_pad_set_chain_function (smokeenc->sinkpad, gst_smokeenc_chain);
+  gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);
+  gst_pad_set_link_function (smokeenc->sinkpad, gst_smokeenc_link);
+  gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->sinkpad);
+
+  smokeenc->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_smokeenc_src_pad_template), "src");
+  gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);
+  gst_pad_set_link_function (smokeenc->sinkpad, gst_smokeenc_link);
+  gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->srcpad);
+
+  /* reset the initial video state */
+  smokeenc->width = 0;
+  smokeenc->height = 0;
+  smokeenc->frame = 0;
+
+  gst_smokeenc_resync (smokeenc);
+
+  smokeenc->min_quality = SMOKEENC_DEFAULT_MIN_QUALITY;
+  smokeenc->max_quality = SMOKEENC_DEFAULT_MAX_QUALITY;
+  smokeenc->threshold = SMOKEENC_DEFAULT_THRESHOLD;
+  smokeenc->keyframe = SMOKEENC_DEFAULT_KEYFRAME;
+}
+
+static GstCaps *
+gst_smokeenc_getcaps (GstPad * pad)
+{
+  GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
+  GstPad *otherpad;
+  GstCaps *caps;
+  const char *name;
+  int i;
+  GstStructure *structure = NULL;
+
+  /* we want to proxy properties like width, height and framerate from the
+     other end of the element */
+  otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;
+  caps = gst_pad_get_allowed_caps (otherpad);
+  if (pad == smokeenc->srcpad) {
+    name = "image/x-smoke";
+  } else {
+    name = "video/x-raw-yuv";
+  }
+  for (i = 0; i < gst_caps_get_size (caps); i++) {
+    structure = gst_caps_get_structure (caps, i);
+
+    gst_structure_set_name (structure, name);
+    gst_structure_remove_field (structure, "format");
+    /* ... but for the sink pad, we only do I420 anyway, so add that */
+    if (pad == smokeenc->sinkpad) {
+      gst_structure_set (structure, "format", GST_TYPE_FOURCC,
+          GST_STR_FOURCC ("I420"), NULL);
+    }
+  }
+
+  return caps;
+}
+
+static GstPadLinkReturn
+gst_smokeenc_link (GstPad * pad, const GstCaps * caps)
+{
+  GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
+  GstStructure *structure;
+  GstPadLinkReturn ret;
+  GstCaps *othercaps;
+  GstPad *otherpad;
+
+  otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;
+
+  structure = gst_caps_get_structure (caps, 0);
+  gst_structure_get_double (structure, "framerate", &smokeenc->fps);
+  gst_structure_get_int (structure, "width", &smokeenc->width);
+  gst_structure_get_int (structure, "height", &smokeenc->height);
+
+  othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
+  gst_caps_set_simple (othercaps,
+      "width", G_TYPE_INT, smokeenc->width,
+      "height", G_TYPE_INT, smokeenc->height,
+      "framerate", G_TYPE_DOUBLE, smokeenc->fps, NULL);
+
+  ret = gst_pad_try_set_caps (smokeenc->srcpad, othercaps);
+  gst_caps_free (othercaps);
+
+  if (GST_PAD_LINK_SUCCESSFUL (ret)) {
+    gst_smokeenc_resync (smokeenc);
+  }
+
+  return ret;
+}
+
+static void
+gst_smokeenc_resync (GstSmokeEnc * smokeenc)
+{
+  GST_DEBUG ("gst_smokeenc_resync: resync");
+
+  smokecodec_encode_new (&smokeenc->info, smokeenc->width, smokeenc->height);
+  smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
+      smokeenc->max_quality);
+
+  GST_DEBUG ("gst_smokeenc_resync: resync done");
+}
+
+static void
+gst_smokeenc_chain (GstPad * pad, GstData * _data)
+{
+  GstBuffer *buf = GST_BUFFER (_data);
+  GstSmokeEnc *smokeenc;
+  guchar *data, *outdata;
+  gulong size;
+  gint outsize, encsize;
+  GstBuffer *outbuf;
+  SmokeCodecFlags flags;
+
+  smokeenc = GST_SMOKEENC (GST_OBJECT_PARENT (pad));
+
+  data = GST_BUFFER_DATA (buf);
+  size = GST_BUFFER_SIZE (buf);
+
+  GST_DEBUG ("gst_smokeenc_chain: got buffer of %ld bytes in '%s'", size,
+      GST_OBJECT_NAME (smokeenc));
+
+  outbuf = gst_buffer_new ();
+  outsize = smokeenc->width * smokeenc->height * 3;
+  outdata = GST_BUFFER_DATA (outbuf) = g_malloc (outsize);
+  GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+  GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
+
+  flags = 0;
+  if (smokeenc->frame == 0) {
+    flags |= SMOKECODEC_KEYFRAME;
+  }
+
+  smokeenc->frame = (smokeenc->frame + 1) % smokeenc->keyframe;
+
+  smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
+      smokeenc->max_quality);
+  smokecodec_set_threshold (smokeenc->info, smokeenc->threshold);
+  smokecodec_encode (smokeenc->info, data, flags, outdata, &encsize);
+  gst_buffer_unref (buf);
+
+  GST_BUFFER_SIZE (outbuf) = encsize;
+  //memset(GST_BUFFER_DATA(outbuf)+encsize, 0, outsize - encsize); 
+
+  gst_pad_push (smokeenc->srcpad, GST_DATA (outbuf));
+}
+
+static void
+gst_smokeenc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstSmokeEnc *smokeenc;
+
+  g_return_if_fail (GST_IS_SMOKEENC (object));
+  smokeenc = GST_SMOKEENC (object);
+
+  switch (prop_id) {
+    case ARG_MIN_QUALITY:
+      smokeenc->min_quality = g_value_get_int (value);
+      break;
+    case ARG_MAX_QUALITY:
+      smokeenc->max_quality = g_value_get_int (value);
+      break;
+    case ARG_THRESHOLD:
+      smokeenc->threshold = g_value_get_int (value);
+      break;
+    case ARG_KEYFRAME:
+      smokeenc->keyframe = g_value_get_int (value);
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_smokeenc_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstSmokeEnc *smokeenc;
+
+  g_return_if_fail (GST_IS_SMOKEENC (object));
+  smokeenc = GST_SMOKEENC (object);
+
+  switch (prop_id) {
+    case ARG_MIN_QUALITY:
+      g_value_set_int (value, smokeenc->min_quality);
+      break;
+    case ARG_MAX_QUALITY:
+      g_value_set_int (value, smokeenc->max_quality);
+      break;
+    case ARG_THRESHOLD:
+      g_value_set_int (value, smokeenc->threshold);
+      break;
+    case ARG_KEYFRAME:
+      g_value_set_int (value, smokeenc->keyframe);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}