This is a first attempt at a wrapper for the lib'ified mpeg2enc of mjpegtools. Currently, there's a few release candi...

Original commit message from CVS:
This is a first attempt at a wrapper for the lib'ified mpeg2enc of
mjpegtools. Currently, there's a few release candidates for mjpegtools-1.6.2
available, but no stable version yet.
I've made 4 small subclasses to wrap input, output, options and generic
encoding model. The last .cc file is the GStreamer plugin element.

Note that it doesn't actually work yet, I'm doing something wrong with
header parsing and Andrew asked me to commit so he could help debugging
that. Apart from that, we should soon be able to make top-quality MPEG
encodes! :).

mpeg2enc licensing is tricky, btw, I don't even want to start discussing
that...

1 files changed, 94 insertions, 0 deletions

diff --git a/ext/mpeg2enc/gstmpeg2encstreamwriter.cc b/ext/mpeg2enc/gstmpeg2encstreamwriter.cc
new file mode 100644
index 00000000..50c70cdf
--- /dev/null
+++ b/ext/mpeg2enc/gstmpeg2encstreamwriter.cc
@@ -0,0 +1,94 @@
+/* GStreamer mpeg2enc (mjpegtools) wrapper
+ * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * gstmpeg2encstreamwriter.cc: GStreamer/mpeg2enc output wrapper
+ *
+ * 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 "gstmpeg2encstreamwriter.hh"
+
+#define BUFSIZE (128*1024)
+
+/*
+ * Class init stuff.
+ */
+
+GstMpeg2EncStreamWriter::GstMpeg2EncStreamWriter (GstPad        *in_pad,
+						  EncoderParams *params) :
+  ElemStrmWriter (*params)
+{
+  pad = in_pad;
+  buf = NULL;
+}
+
+/*
+ * Output functions.
+ */
+
+void
+GstMpeg2EncStreamWriter::PutBits (guint32 val,
+				  gint    n)
+{
+  /* only relevant bits */
+  val &= ~(0xffffffffU << n);
+
+  /* write data */
+  while (n >= outcnt) {
+    if (!buf) {
+      buf = gst_buffer_new_and_alloc (BUFSIZE);
+      GST_BUFFER_SIZE (buf) = 0;
+    }
+
+    outbfr = (outbfr << outcnt ) | (val >> (n - outcnt));
+    GST_BUFFER_DATA (buf)[GST_BUFFER_SIZE (buf)++] = outbfr;
+    n -= outcnt;
+    outcnt = 8;
+    bytecnt++;
+
+    if (GST_BUFFER_SIZE (buf) >= GST_BUFFER_MAXSIZE (buf))
+      FrameFlush ();
+  }
+
+  /* cache remaining bits */
+  if (n != 0) {
+    outbfr = (outbfr << n) | val;
+    outcnt -= n;
+  }
+}
+
+void
+GstMpeg2EncStreamWriter::FrameBegin ()
+{
+}
+
+void
+GstMpeg2EncStreamWriter::FrameFlush ()
+{
+  if (buf) {
+    gst_pad_push (pad, GST_DATA (buf));
+    buf = NULL;
+  }
+}
+
+void
+GstMpeg2EncStreamWriter::FrameDiscard ()
+{
+}