pnm: Add PNM encoder and decoder elements

Fixes bug #164870.

8 files changed, 867 insertions, 0 deletions

diff --git a/gst/pnm/Makefile.am b/gst/pnm/Makefile.am
new file mode 100644
index 000000000..a2463c939
--- /dev/null
+++ b/gst/pnm/Makefile.am
@@ -0,0 +1,8 @@
+plugin_LTLIBRARIES = libgstpnm.la
+
+libgstpnm_la_SOURCES = gstpnmutils.c gstpnm.c gstpnmdec.c gstpnmenc.c
+libgstpnm_la_CFLAGS = $(GST_CFLAGS)
+libgstpnm_la_LIBADD = $(GST_LIBS)
+libgstpnm_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = gstpnmdec.h gstpnmutils.h gstpnmenc.h
diff --git a/gst/pnm/gstpnm.c b/gst/pnm/gstpnm.c
new file mode 100644
index 000000000..36d0e29cf
--- /dev/null
+++ b/gst/pnm/gstpnm.c
@@ -0,0 +1,98 @@
+/* GStreamer
+ *
+ * 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 "gstpnmdec.h"
+#include "gstpnmenc.h"
+#include "gstpnmutils.h"
+
+#include <gst/gstplugin.h>
+#include <gst/gstversion.h>
+#include <gst/gsttypefind.h>
+
+#include <string.h>
+
+static GstStaticCaps bitmap_caps = GST_STATIC_CAPS (MIME_BM);
+static GstStaticCaps graymap_caps = GST_STATIC_CAPS (MIME_GM);
+static GstStaticCaps pixmap_caps = GST_STATIC_CAPS (MIME_PM);
+
+#define BITMAP_CAPS (gst_static_caps_get (&bitmap_caps))
+#define GRAYMAP_CAPS (gst_static_caps_get (&graymap_caps))
+#define PIXMAP_CAPS (gst_static_caps_get (&pixmap_caps))
+
+static void
+gst_my_typefind_function (GstTypeFind * tf, gpointer d)
+{
+  GstPnmInfoMngrResult r = GST_PNM_INFO_MNGR_RESULT_READING;
+  GstPnmInfoMngr mngr = { 0, };
+  guint i;
+  guint8 *data = NULL;
+
+  for (i = 0; r == GST_PNM_INFO_MNGR_RESULT_READING; i++) {
+    data = gst_type_find_peek (tf, i, 1);
+    if (!data)
+      break;
+    r = gst_pnm_info_mngr_scan (&mngr, data, 1);
+  }
+  switch (r) {
+    case GST_PNM_INFO_MNGR_RESULT_READING:
+    case GST_PNM_INFO_MNGR_RESULT_FAILED:
+      return;
+    case GST_PNM_INFO_MNGR_RESULT_FINISHED:
+      switch (mngr.info.type) {
+        case GST_PNM_TYPE_BITMAP_ASCII:
+        case GST_PNM_TYPE_BITMAP_RAW:
+          gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, BITMAP_CAPS);
+          return;
+        case GST_PNM_TYPE_GRAYMAP_ASCII:
+        case GST_PNM_TYPE_GRAYMAP_RAW:
+          gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, GRAYMAP_CAPS);
+          return;
+        case GST_PNM_TYPE_PIXMAP_ASCII:
+        case GST_PNM_TYPE_PIXMAP_RAW:
+          gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, PIXMAP_CAPS);
+          return;
+      }
+  }
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  static gchar *exts[] = { "pnm", NULL };
+
+  if (!gst_type_find_register (plugin, "", GST_RANK_PRIMARY,
+          gst_my_typefind_function, exts, gst_caps_new_simple (MIME_ALL, NULL),
+          NULL, NULL))
+    return FALSE;
+
+  if (!gst_element_register (plugin, "pnmdec", GST_RANK_PRIMARY,
+          GST_TYPE_PNMDEC))
+    return FALSE;
+  if (!gst_element_register (plugin, "pnmenc", GST_RANK_PRIMARY,
+          GST_TYPE_PNMENC))
+    return FALSE;
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "pnm",
+    "PNM plugin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
+    GST_PACKAGE_ORIGIN)
diff --git a/gst/pnm/gstpnmdec.c b/gst/pnm/gstpnmdec.c
new file mode 100644
index 000000000..c02ad3c6b
--- /dev/null
+++ b/gst/pnm/gstpnmdec.c
@@ -0,0 +1,194 @@
+/* GStreamer
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-pnmdec
+ *
+ * Decodes pnm images.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch filesrc location=test.pnm ! pnmdec ! ximagesink
+ * ]| The above pipeline reads a pnm file and renders it to the screen.
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstpnmdec.h"
+#include "gstpnmutils.h"
+
+#include <gst/gstutils.h>
+
+#include <string.h>
+
+static GstElementDetails pnmdec_details = GST_ELEMENT_DETAILS ("PNM converter",
+    "Codec/Decoder/Image", "Decodes PNM format",
+    "Lutz Mueller <lutz@users.sourceforge.net>");
+
+static GstElementClass *parent_class;
+
+static GstStaticPadTemplate gst_pnmdec_src_pad_template =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-rgb, bpp = (int) 24, "
+        "width = (int) [ 1, MAX ], height = (int) [ 1, MAX ]"));
+
+static GstStaticPadTemplate gst_pnmdec_sink_pad_template =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (MIME_ALL));
+
+static GstFlowReturn
+gst_pnmdec_chain (GstPad * pad, GstBuffer * data)
+{
+  GstPnmdec *s = GST_PNMDEC (gst_pad_get_parent (pad));
+  GstPad *src = gst_element_get_static_pad (GST_ELEMENT (s), "src");
+  GstBuffer *buf;
+  GstCaps *caps = NULL;
+  GstFlowReturn r = GST_FLOW_OK;
+  guint8 offset = 0;
+
+  if (!(s->mngr.info.fields & GST_PNM_INFO_FIELDS_ALL)) {
+    switch (gst_pnm_info_mngr_scan (&s->mngr, GST_BUFFER_DATA (data),
+            GST_BUFFER_SIZE (data))) {
+      case GST_PNM_INFO_MNGR_RESULT_FAILED:
+        gst_buffer_unref (data);
+        return GST_FLOW_ERROR;
+      case GST_PNM_INFO_MNGR_RESULT_READING:
+        gst_buffer_unref (data);
+        return GST_FLOW_OK;
+      case GST_PNM_INFO_MNGR_RESULT_FINISHED:
+        offset = s->mngr.data_offset;
+        caps = gst_pad_get_caps (src);
+        gst_caps_set_simple (caps,
+            "width", G_TYPE_INT, s->mngr.info.width,
+            "height", G_TYPE_INT, s->mngr.info.height, NULL);
+        if (!gst_pad_set_caps (src, caps)) {
+          gst_caps_unref (caps);
+          return GST_FLOW_ERROR;
+        }
+        gst_caps_unref (caps);
+        switch (s->mngr.info.type) {
+          case GST_PNM_TYPE_BITMAP_RAW:
+          case GST_PNM_TYPE_BITMAP_ASCII:
+          case GST_PNM_TYPE_GRAYMAP_RAW:
+          case GST_PNM_TYPE_GRAYMAP_ASCII:
+            s->size = s->mngr.info.width * s->mngr.info.height * 1;
+            break;
+          case GST_PNM_TYPE_PIXMAP_RAW:
+          case GST_PNM_TYPE_PIXMAP_ASCII:
+            s->size = s->mngr.info.width * s->mngr.info.height * 3;
+            break;
+        }
+    }
+  }
+
+  if (offset == GST_BUFFER_SIZE (data))
+    return GST_FLOW_OK;
+
+  /* If we got the whole image, just push the buffer. */
+  if (GST_BUFFER_SIZE (data) - offset == s->size) {
+    buf = gst_buffer_create_sub (data, offset, s->size);
+    gst_buffer_unref (data);
+    memset (&s->mngr, 0, sizeof (GstPnmInfoMngr));
+    s->size = 0;
+    gst_buffer_set_caps (buf, GST_PAD_CAPS (src));
+    return gst_pad_push (src, buf);
+  }
+
+  /* We didn't get the whole image. */
+  if (!s->buf) {
+    s->buf = gst_buffer_create_sub (data, offset,
+        GST_BUFFER_SIZE (data) - offset);
+  } else {
+    buf = gst_buffer_span (s->buf, 0, data,
+        GST_BUFFER_SIZE (s->buf) + GST_BUFFER_SIZE (data) - offset);
+    gst_buffer_unref (s->buf);
+    s->buf = buf;
+  }
+  if (!s->buf)
+    return GST_FLOW_ERROR;
+
+  /* Do we now have the full image? If yes, push. */
+  if (GST_BUFFER_SIZE (s->buf) == s->size) {
+    gst_buffer_set_caps (s->buf, GST_PAD_CAPS (src));
+    r = gst_pad_push (src, s->buf);
+    s->buf = NULL;
+    memset (&s->mngr, 0, sizeof (GstPnmInfoMngr));
+    s->size = 0;
+  }
+
+  return r;
+}
+
+static void
+gst_pnmdec_finalize (GObject * object)
+{
+  GstPnmdec *dec = GST_PNMDEC (object);
+
+  if (dec->buf) {
+    gst_buffer_unref (dec->buf);
+    dec->buf = NULL;
+  }
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_pnmdec_init (GstPnmdec * s, GstPnmdecClass * klass)
+{
+  GstPad *pad;
+
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_pnmdec_sink_pad_template), "sink");
+  gst_pad_set_chain_function (pad, gst_pnmdec_chain);
+  gst_element_add_pad (GST_ELEMENT (s), pad);
+
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_pnmdec_src_pad_template), "src");
+  gst_pad_use_fixed_caps (pad);
+  gst_element_add_pad (GST_ELEMENT (s), pad);
+}
+
+static void
+gst_pnmdec_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_pnmdec_sink_pad_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_pnmdec_src_pad_template));
+  gst_element_class_set_details (element_class, &pnmdec_details);
+}
+
+static void
+gst_pnmdec_class_init (GstPnmdecClass * klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->finalize = gst_pnmdec_finalize;
+}
+
+GST_BOILERPLATE (GstPnmdec, gst_pnmdec, GstElement, GST_TYPE_ELEMENT)
diff --git a/gst/pnm/gstpnmdec.h b/gst/pnm/gstpnmdec.h
new file mode 100644
index 000000000..318ba2588
--- /dev/null
+++ b/gst/pnm/gstpnmdec.h
@@ -0,0 +1,55 @@
+/* GStreamer
+ *
+ * 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.
+ */
+
+#ifndef __GST_PNMDEC_H__
+#define __GST_PNMDEC_H__
+
+#include <gst/gstelement.h>
+
+#include "gstpnmutils.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_PNMDEC (gst_pnmdec_get_type())
+#define GST_PNMDEC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PNMDEC,GstPnmdec))
+#define GST_PNMDEC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PNMDEC,GstPnmdec))
+#define GST_IS_PNMDEC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PNMDEC))
+#define GST_IS_PNMDEC_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PNMDEC))
+
+typedef struct _GstPnmdec GstPnmdec;
+typedef struct _GstPnmdecClass GstPnmdecClass;
+
+struct _GstPnmdec
+{
+  GstElement element;
+
+  GstPnmInfoMngr mngr;
+  guint size;
+  GstBuffer *buf;
+};
+
+struct _GstPnmdecClass
+{
+  GstElementClass parent_class;
+};
+
+GType gst_pnmdec_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __GST_PNMDEC_H__ */
diff --git a/gst/pnm/gstpnmenc.c b/gst/pnm/gstpnmenc.c
new file mode 100644
index 000000000..56348bd53
--- /dev/null
+++ b/gst/pnm/gstpnmenc.c
@@ -0,0 +1,170 @@
+/* GStreamer
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-pnmenc
+ *
+ * Encodes pnm images.
+ *
+ * <refsect">
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch videotestsrc num_buffers=1 ! pnmenc ! filesink location=test.pnm
+ * ]| The above pipeline writes a test pnm file.
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstpnmenc.h"
+#include "gstpnmutils.h"
+
+#include <gst/gstutils.h>
+
+#include <string.h>
+
+static GstElementDetails pnmenc_details =
+GST_ELEMENT_DETAILS ("PNM converter", "Codec/Encoder/Image",
+    "Encodes in PNM format",
+    "Lutz Mueller <lutz@users.sourceforge.net>");
+
+static GstStaticPadTemplate sink_pad_template =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-rgb, bpp = (int) 24, "
+        "width = (int) [ 1, MAX ], height = (int) [ 1, MAX ]"));
+
+static GstStaticPadTemplate src_pad_template =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (MIME_ALL));
+
+static GstFlowReturn
+gst_pnmenc_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstPnmenc *s = GST_PNMENC (gst_pad_get_parent (pad));
+  GstPad *src = gst_element_get_static_pad (GST_ELEMENT (s), "src");
+  GstFlowReturn r;
+  gchar *header;
+  GstBuffer *out;
+
+  /* The caps on the source may not be set. */
+  if (!GST_PAD_CAPS (src)) {
+    GstCaps *caps = gst_caps_new_simple (MIME_PM, NULL);
+    gst_pad_set_caps (src, caps);
+    gst_caps_unref (caps);
+  }
+
+  /* Assumption: One buffer, one image. That is, always first write header. */
+  header = g_strdup_printf ("P%i\n%i %i\n%i\n",
+      s->info.type, s->info.width, s->info.height, s->info.max);
+  out = gst_buffer_new ();
+  gst_buffer_set_data (out, (guchar *) header, strlen (header));
+  gst_buffer_set_caps (out, GST_PAD_CAPS (src));
+  if ((r = gst_pad_push (src, buf)) != GST_FLOW_OK)
+    return r;
+
+  /* Pass through the data. */
+  gst_buffer_set_caps (buf, GST_PAD_CAPS (src));
+  return gst_pad_push (src, buf);
+}
+
+static gboolean
+gst_pnmenc_setcaps_func_sink (GstPad * pad, GstCaps * caps)
+{
+  GstPnmenc *s = GST_PNMENC (gst_pad_get_parent (pad));
+  GstStructure *structure = gst_caps_get_structure (caps, 0);
+
+  if (!gst_structure_get_int (structure, "width", (int *) &s->info.width) ||
+      !gst_structure_get_int (structure, "height", (int *) &s->info.height))
+    return FALSE;
+  s->info.fields = GST_PNM_INFO_FIELDS_WIDTH | GST_PNM_INFO_FIELDS_HEIGHT;
+
+  return TRUE;
+}
+
+static GstPadLinkReturn
+gst_pnmenc_setcaps_func_src (GstPad * pad, GstCaps * caps)
+{
+  GstPnmenc *s = GST_PNMENC (gst_pad_get_parent (pad));
+  guint i;
+
+  s->info.fields &= ~GST_PNM_INFO_FIELDS_TYPE;
+  for (i = 0; i < gst_caps_get_size (caps); i++) {
+    GstStructure *structure = gst_caps_get_structure (caps, i);
+    const gchar *mime = gst_structure_get_name (structure);
+
+    if (!strcmp (mime, MIME_BM)) {
+      s->info.type = GST_PNM_TYPE_BITMAP_RAW;
+      break;
+    }
+    if (!strcmp (mime, MIME_GM)) {
+      s->info.type = GST_PNM_TYPE_GRAYMAP_RAW;
+      break;
+    }
+    if (!strcmp (mime, MIME_PM) || !strcmp (mime, MIME_AM)) {
+      s->info.type = GST_PNM_TYPE_PIXMAP_RAW;
+      break;
+    }
+  }
+  if (i == gst_caps_get_size (caps))
+    return FALSE;
+  s->info.max = 255;
+  s->info.fields |= GST_PNM_INFO_FIELDS_TYPE | GST_PNM_INFO_FIELDS_MAX;
+
+  return TRUE;
+}
+
+static void
+gst_pnmenc_init (GstPnmenc * s, GstPnmencClass * klass)
+{
+  GstPad *pad;
+
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&sink_pad_template), "sink");
+  gst_pad_set_setcaps_function (pad, gst_pnmenc_setcaps_func_sink);
+  gst_pad_set_chain_function (pad, gst_pnmenc_chain);
+  gst_element_add_pad (GST_ELEMENT (s), pad);
+
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&src_pad_template), "src");
+  gst_pad_set_setcaps_function (pad, gst_pnmenc_setcaps_func_src);
+  gst_element_add_pad (GST_ELEMENT (s), pad);
+}
+
+static void
+gst_pnmenc_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 (&sink_pad_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_pad_template));
+  gst_element_class_set_details (element_class, &pnmenc_details);
+}
+
+static void
+gst_pnmenc_class_init (GstPnmencClass * klass)
+{
+  /* Nothing to see here. Move along. */
+}
+
+GST_BOILERPLATE (GstPnmenc, gst_pnmenc, GstElement, GST_TYPE_ELEMENT)
diff --git a/gst/pnm/gstpnmenc.h b/gst/pnm/gstpnmenc.h
new file mode 100644
index 000000000..152414168
--- /dev/null
+++ b/gst/pnm/gstpnmenc.h
@@ -0,0 +1,53 @@
+/* GStreamer
+ *
+ * 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.
+ */
+
+#ifndef __GST_PNMENC_H__
+#define __GST_PNMENC_H__
+
+#include <gst/gstelement.h>
+
+#include "gstpnmutils.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_PNMENC  (gst_pnmenc_get_type())
+#define GST_PNMENC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PNMENC,GstPnmenc))
+#define GST_PNMENC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PNMENC,GstPnmenc))
+#define GST_IS_PNMENC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PNMENC))
+#define GST_IS_PNMENC_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PNMENC))
+
+typedef struct _GstPnmenc GstPnmenc;
+typedef struct _GstPnmencClass GstPnmencClass;
+
+struct _GstPnmenc
+{
+  GstElement element;
+
+  GstPnmInfo info;
+};
+
+struct _GstPnmencClass
+{
+  GstElementClass parent_class;
+};
+
+GType gst_pnmenc_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __GST_PNMENC_H__ */
diff --git a/gst/pnm/gstpnmutils.c b/gst/pnm/gstpnmutils.c
new file mode 100644
index 000000000..a0c8f384c
--- /dev/null
+++ b/gst/pnm/gstpnmutils.c
@@ -0,0 +1,203 @@
+/* GStreamer
+ *
+ * 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.
+ */
+
+#include "gstpnmutils.h"
+
+GstPnmInfoMngrResult
+gst_pnm_info_mngr_scan (GstPnmInfoMngr * mngr, const guint8 * buf,
+    guint buf_len)
+{
+  guint i = 0;
+
+  g_return_val_if_fail (mngr != NULL, GST_PNM_INFO_MNGR_RESULT_FAILED);
+  g_return_val_if_fail (buf || !buf_len, GST_PNM_INFO_MNGR_RESULT_FAILED);
+
+  if (!buf_len)
+    return (mngr->info.fields ==
+        GST_PNM_INFO_FIELDS_ALL) ? GST_PNM_INFO_MNGR_RESULT_FINISHED :
+        GST_PNM_INFO_MNGR_RESULT_READING;
+
+  switch (mngr->state) {
+    case GST_PNM_INFO_MNGR_STATE_COMMENT:
+      for (i = 0; (i < buf_len) && (buf[i] != '\n'); i++);
+      if (i == buf_len)
+        return GST_PNM_INFO_MNGR_RESULT_READING;
+      mngr->state = GST_PNM_INFO_MNGR_STATE_NONE;
+      mngr->data_offset += i;
+      return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+    case GST_PNM_INFO_MNGR_STATE_WHITE_SPACE:
+      for (i = 0; (i < buf_len) && ((buf[i] == ' ') || (buf[i] == '\t')
+              || (buf[i] == '\n')); i++);
+      if (i == buf_len)
+        return GST_PNM_INFO_MNGR_RESULT_READING;
+      mngr->state = GST_PNM_INFO_MNGR_STATE_NONE;
+      mngr->data_offset += i;
+      return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+    case GST_PNM_INFO_MNGR_STATE_NONE:
+      switch (buf[i++]) {
+        case '#':
+          mngr->state = GST_PNM_INFO_MNGR_STATE_COMMENT;
+          mngr->data_offset += i;
+          return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+        case ' ':
+        case '\t':
+        case '\n':
+          mngr->state = GST_PNM_INFO_MNGR_STATE_WHITE_SPACE;
+          mngr->data_offset += i;
+          return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+        case 'P':
+          if (mngr->info.fields & GST_PNM_INFO_FIELDS_TYPE)
+            return GST_PNM_INFO_MNGR_RESULT_FAILED;
+          mngr->state = GST_PNM_INFO_MNGR_STATE_DATA_TYPE;
+          mngr->data_offset += i;
+          return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+        case '0':
+        case '1':
+        case '2':
+        case '3':
+        case '4':
+        case '5':
+        case '6':
+        case '7':
+        case '8':
+        case '9':
+          if (mngr->info.fields & GST_PNM_INFO_FIELDS_MAX)
+            return GST_PNM_INFO_MNGR_RESULT_FINISHED;
+          if (mngr->info.fields & GST_PNM_INFO_FIELDS_HEIGHT) {
+            mngr->state = GST_PNM_INFO_MNGR_STATE_DATA_MAX;
+            return gst_pnm_info_mngr_scan (mngr, buf, buf_len);
+          }
+          if (mngr->info.fields & GST_PNM_INFO_FIELDS_WIDTH) {
+            mngr->state = GST_PNM_INFO_MNGR_STATE_DATA_HEIGHT;
+            return gst_pnm_info_mngr_scan (mngr, buf, buf_len);
+          }
+          mngr->state = GST_PNM_INFO_MNGR_STATE_DATA_WIDTH;
+          return gst_pnm_info_mngr_scan (mngr, buf, buf_len);
+        default:
+          return GST_PNM_INFO_MNGR_RESULT_FAILED;
+      }
+    case GST_PNM_INFO_MNGR_STATE_DATA_TYPE:
+      switch (buf[i++]) {
+        case '1':
+          mngr->info.type = GST_PNM_TYPE_BITMAP_ASCII;
+          break;
+        case '2':
+          mngr->info.type = GST_PNM_TYPE_GRAYMAP_ASCII;
+          break;
+        case '3':
+          mngr->info.type = GST_PNM_TYPE_PIXMAP_ASCII;
+          break;
+        case '4':
+          mngr->info.type = GST_PNM_TYPE_BITMAP_RAW;
+          break;
+        case '5':
+          mngr->info.type = GST_PNM_TYPE_GRAYMAP_RAW;
+          break;
+        case '6':
+          mngr->info.type = GST_PNM_TYPE_PIXMAP_RAW;
+          break;
+        default:
+          return GST_PNM_INFO_MNGR_RESULT_FAILED;
+      }
+      mngr->info.fields |= GST_PNM_INFO_FIELDS_TYPE;
+      mngr->state = GST_PNM_INFO_MNGR_STATE_WHITE_SPACE;
+      if (i == buf_len)
+        return GST_PNM_INFO_MNGR_RESULT_READING;
+      mngr->info.width = mngr->info.height = mngr->info.max = 0;
+      mngr->data_offset += i;
+      return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+    case GST_PNM_INFO_MNGR_STATE_DATA_WIDTH:
+      if ((buf[i] < '0') || (buf[i] > '9')) {
+        switch (buf[i]) {
+          case '\n':
+          case '\t':
+          case ' ':
+            mngr->state = GST_PNM_INFO_MNGR_STATE_WHITE_SPACE;
+            mngr->data_offset += i;
+            return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+          default:
+            return GST_PNM_INFO_MNGR_RESULT_FAILED;
+        }
+      }
+      mngr->info.width *= 10;
+      mngr->info.width += buf[i++] - 0x030;
+      mngr->info.fields |= GST_PNM_INFO_FIELDS_WIDTH;
+      mngr->data_offset += i;
+      return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+    case GST_PNM_INFO_MNGR_STATE_DATA_HEIGHT:
+      if ((buf[i] < '0') || (buf[i] > '9')) {
+        switch (buf[i]) {
+          case '\n':
+          case '\t':
+          case ' ':
+            mngr->state = GST_PNM_INFO_MNGR_STATE_WHITE_SPACE;
+            mngr->data_offset += i;
+            return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+          default:
+            return GST_PNM_INFO_MNGR_RESULT_FAILED;
+        }
+      }
+      mngr->info.height *= 10;
+      mngr->info.height += buf[i++] - 0x030;
+      mngr->info.fields |= GST_PNM_INFO_FIELDS_HEIGHT;
+      mngr->data_offset += i;
+      return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+    case GST_PNM_INFO_MNGR_STATE_DATA_MAX:
+      if ((buf[i] < '0') || (buf[i] > '9')) {
+        switch (buf[i]) {
+          case '\n':
+          case '\t':
+          case ' ':
+            mngr->data_offset += i + 1;
+            return GST_PNM_INFO_MNGR_RESULT_FINISHED;
+          default:
+            return GST_PNM_INFO_MNGR_RESULT_FAILED;
+        }
+      }
+      mngr->info.max *= 10;
+      mngr->info.max += buf[i++] - 0x030;
+      mngr->info.fields |= GST_PNM_INFO_FIELDS_MAX;
+      mngr->data_offset += i;
+      return gst_pnm_info_mngr_scan (mngr, buf + i, buf_len - i);
+  }
+  return GST_PNM_INFO_MNGR_RESULT_FAILED;
+}
+
+GType
+gst_pnm_type_get_type (void)
+{
+  static GType etype = 0;
+
+  if (etype == 0) {
+    static const GEnumValue values[] = {
+      {GST_PNM_TYPE_BITMAP_RAW, "GST_PNM_TYPE_BITMAP_RAW", MIME_BM " (ascii)"},
+      {GST_PNM_TYPE_GRAYMAP_ASCII, "GST_PNM_TYPE_BITMAP_ASCII",
+          MIME_BM " (raw)"},
+      {GST_PNM_TYPE_GRAYMAP_RAW, "GST_PNM_TYPE_GRAYMAP_RAW",
+          MIME_GM " (ascii)"},
+      {GST_PNM_TYPE_GRAYMAP_ASCII, "GST_PNM_TYPE_GRAYMAP_ASCII",
+          MIME_GM " (raw)"},
+      {GST_PNM_TYPE_PIXMAP_RAW, "GST_PNM_TYPE_PIXMAP_RAW", MIME_PM " (ascii)"},
+      {GST_PNM_TYPE_PIXMAP_ASCII, "GST_PNM_TYPE_PIXMAP_ASCII",
+          MIME_PM " (raw)"},
+      {0, NULL, NULL}
+    };
+    etype = g_enum_register_static ("GstPnmdecType", values);
+  }
+  return etype;
+}
diff --git a/gst/pnm/gstpnmutils.h b/gst/pnm/gstpnmutils.h
new file mode 100644
index 000000000..b0afb5fc2
--- /dev/null
+++ b/gst/pnm/gstpnmutils.h
@@ -0,0 +1,86 @@
+/* GStreamer
+ *
+ * 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.
+ */
+
+#ifndef __GST_PNM_UTILS_H__
+#define __GST_PNM_UTILS_H__
+
+#include <glib.h>
+#include <glib-object.h>
+
+#define MIME_BM "image/x-image-bitmap"
+#define MIME_GM "image/x-image-graymap"
+#define MIME_PM "image/x-image-pixmap"
+#define MIME_AM "image/x-image-anymap"
+#define MIME_ALL MIME_BM "; " MIME_GM "; " MIME_PM "; " MIME_AM
+
+typedef enum
+{
+  GST_PNM_INFO_FIELDS_TYPE = 1 << 0,
+  GST_PNM_INFO_FIELDS_WIDTH = 1 << 1,
+  GST_PNM_INFO_FIELDS_HEIGHT = 1 << 2,
+  GST_PNM_INFO_FIELDS_MAX = 1 << 3
+} GstPnmInfoFields;
+
+#define GST_PNM_INFO_FIELDS_ALL (GST_PNM_INFO_FIELDS_TYPE | GST_PNM_INFO_FIELDS_WIDTH | GST_PNM_INFO_FIELDS_HEIGHT | GST_PNM_INFO_FIELDS_MAX)
+
+typedef enum
+{
+  GST_PNM_TYPE_BITMAP_ASCII = 1,
+  GST_PNM_TYPE_GRAYMAP_ASCII = 2,
+  GST_PNM_TYPE_PIXMAP_ASCII = 3,
+  GST_PNM_TYPE_BITMAP_RAW = 4,
+  GST_PNM_TYPE_GRAYMAP_RAW = 5,
+  GST_PNM_TYPE_PIXMAP_RAW = 6
+} GstPnmType;
+GType gst_pnm_type_get_type (void);
+
+typedef struct
+{
+  GstPnmInfoFields fields;
+  GstPnmType type;
+  guint width, height, max;
+} GstPnmInfo;
+
+typedef enum
+{
+  GST_PNM_INFO_MNGR_STATE_NONE = 0,
+  GST_PNM_INFO_MNGR_STATE_DATA_TYPE,
+  GST_PNM_INFO_MNGR_STATE_DATA_WIDTH,
+  GST_PNM_INFO_MNGR_STATE_DATA_HEIGHT,
+  GST_PNM_INFO_MNGR_STATE_DATA_MAX,
+  GST_PNM_INFO_MNGR_STATE_COMMENT,
+  GST_PNM_INFO_MNGR_STATE_WHITE_SPACE
+} GstPnmInfoMngrState;
+
+typedef struct
+{
+  GstPnmInfoMngrState state;
+  GstPnmInfo info;
+  guint8 data_offset;
+} GstPnmInfoMngr;
+
+typedef enum
+{
+  GST_PNM_INFO_MNGR_RESULT_FAILED,
+  GST_PNM_INFO_MNGR_RESULT_READING,
+  GST_PNM_INFO_MNGR_RESULT_FINISHED
+} GstPnmInfoMngrResult;
+
+GstPnmInfoMngrResult gst_pnm_info_mngr_scan (GstPnmInfoMngr *, const guint8 *, guint);
+
+#endif /* __GST_PNM_UTILS_H__ */