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-rw-r--r--gst/ivfparse/gstivfparse.c313
-rw-r--r--gst/ivfparse/gstivfparse.h73
2 files changed, 386 insertions, 0 deletions
diff --git a/gst/ivfparse/gstivfparse.c b/gst/ivfparse/gstivfparse.c
new file mode 100644
index 000000000..be2224e64
--- /dev/null
+++ b/gst/ivfparse/gstivfparse.c
@@ -0,0 +1,313 @@
+/* -*- Mode: c; c-basic-offset: 2; indent-tabs-mode: nil -*- */
+/*
+ * GStreamer IVF parser
+ * (c) 2010 Opera Software ASA, Philip Jägenstedt <philipj@opera.com>
+ *
+ * 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.
+ */
+
+/* Snippets of source code copied freely from wavparse,
+ * aviparse and auparse. */
+
+/* File format as written by libvpx ivfenc:
+ *
+ * All fields are little endian.
+ *
+ * 32 byte file header format:
+ *
+ * 0-3: "DKIF" (file magic)
+ * 4-5: version (uint16)
+ * 6-7: header size (uint16)
+ * 8-11: "VP80" (FOURCC)
+ * 12-13: width (uint16)
+ * 14-15: height (uint16)
+ * 16-19: framerate numerator (uint32)
+ * 20-23: framerate denominator (uint32)
+ * 24-27: frame count (uint32)
+ * 28-31: unused
+ *
+ * 12 byte frame header format:
+ *
+ * 0-3: frame size in bytes (uint32)
+ * 4-11: time stamp (uint64)
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "gstivfparse.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_ivfparse_debug);
+#define GST_CAT_DEFAULT gst_ivfparse_debug
+
+/* sink and src pad templates */
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-ivf")
+ );
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("ANY")
+ );
+
+GST_BOILERPLATE (GstIvfParse, gst_ivfparse, GstElement, GST_TYPE_ELEMENT);
+
+static void gst_ivfparse_dispose (GObject * object);
+static GstFlowReturn gst_ivfparse_chain (GstPad * pad, GstBuffer * buf);
+
+/* GObject vmethod implementations */
+
+static void
+gst_ivfparse_base_init (gpointer gclass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ gst_element_class_set_details_simple (element_class,
+ "IVF parser",
+ "Codec/Demuxer",
+ "Demuxes a IVF stream", "Philip Jägenstedt <philipj@opera.com>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory));
+}
+
+/* initialize the ivfparse's class */
+static void
+gst_ivfparse_class_init (GstIvfParseClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ gobject_class->dispose = gst_ivfparse_dispose;
+}
+
+static void
+gst_ivfparse_reset (GstIvfParse * ivf)
+{
+ if (ivf->adapter) {
+ gst_adapter_clear (ivf->adapter);
+ g_object_unref (ivf->adapter);
+ ivf->adapter = NULL;
+ }
+ ivf->state = GST_IVFPARSE_START;
+ ivf->rate_num = 0;
+ ivf->rate_den = 0;
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set pad calback functions
+ * initialize instance structure
+ */
+static void
+gst_ivfparse_init (GstIvfParse * ivf, GstIvfParseClass * gclass)
+{
+ /* sink pad */
+ ivf->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
+ gst_pad_set_chain_function (ivf->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ivfparse_chain));
+
+ /* src pad */
+ ivf->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
+ gst_pad_use_fixed_caps (ivf->srcpad);
+
+ gst_element_add_pad (GST_ELEMENT (ivf), ivf->sinkpad);
+ gst_element_add_pad (GST_ELEMENT (ivf), ivf->srcpad);
+
+ /* reset */
+ gst_ivfparse_reset (ivf);
+}
+
+static void
+gst_ivfparse_dispose (GObject * object)
+{
+ GstIvfParse *ivf = GST_IVFPARSE (object);
+
+ GST_DEBUG_OBJECT (ivf, "disposing");
+ gst_ivfparse_reset (ivf);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+/* GstElement vmethod implementations */
+
+/* chain function
+ * this function does the actual processing
+ */
+static GstFlowReturn
+gst_ivfparse_chain (GstPad * pad, GstBuffer * buf)
+{
+ GstIvfParse *ivf = GST_IVFPARSE (GST_OBJECT_PARENT (pad));
+ gboolean res;
+
+ /* lazy creation of the adapter */
+ if (G_UNLIKELY (ivf->adapter == NULL)) {
+ ivf->adapter = gst_adapter_new ();
+ }
+
+ GST_LOG_OBJECT (ivf, "Pushing buffer of size %u to adapter",
+ GST_BUFFER_SIZE (buf));
+
+ gst_adapter_push (ivf->adapter, buf); /* adapter takes ownership of buf */
+
+ res = GST_FLOW_OK;
+
+ switch (ivf->state) {
+ case GST_IVFPARSE_START:
+ if (gst_adapter_available (ivf->adapter) >= 32) {
+ GstCaps *caps;
+
+ const guint8 *data = gst_adapter_peek (ivf->adapter, 32);
+ guint32 magic = GST_READ_UINT32_LE (data);
+ guint16 version = GST_READ_UINT16_LE (data + 4);
+ guint16 header_size = GST_READ_UINT16_LE (data + 6);
+ guint32 fourcc = GST_READ_UINT32_LE (data + 8);
+ guint16 width = GST_READ_UINT16_LE (data + 12);
+ guint16 height = GST_READ_UINT16_LE (data + 14);
+ guint32 rate_num = GST_READ_UINT32_LE (data + 16);
+ guint32 rate_den = GST_READ_UINT32_LE (data + 20);
+ guint32 num_frames = GST_READ_UINT32_LE (data + 24);
+ /* last 4 bytes unused */
+ gst_adapter_flush (ivf->adapter, 32);
+
+ if (magic != GST_MAKE_FOURCC ('D', 'K', 'I', 'F') ||
+ version != 0 || header_size != 32 ||
+ fourcc != GST_MAKE_FOURCC ('V', 'P', '8', '0')) {
+ GST_ELEMENT_ERROR (ivf, STREAM, WRONG_TYPE, (NULL), (NULL));
+ return GST_FLOW_ERROR;
+ }
+
+ /* create src pad caps */
+ caps = gst_caps_new_simple ("video/x-vp8",
+ "width", G_TYPE_INT, width, "height", G_TYPE_INT, height,
+ "framerate", GST_TYPE_FRACTION, rate_num, rate_den, NULL);
+
+ GST_INFO_OBJECT (ivf, "Found stream: %" GST_PTR_FORMAT, caps);
+
+ GST_LOG_OBJECT (ivf, "Stream has %d frames", num_frames);
+
+ gst_pad_set_caps (ivf->srcpad, caps);
+ gst_caps_unref (caps);
+
+ /* keep framerate in instance for convenience */
+ ivf->rate_num = rate_num;
+ ivf->rate_den = rate_den;
+
+ /* move along */
+ ivf->state = GST_IVFPARSE_DATA;
+ } else {
+ GST_LOG_OBJECT (ivf, "Header data not yet available.");
+ break;
+ }
+
+ /* fall through */
+
+ case GST_IVFPARSE_DATA:
+ while (gst_adapter_available (ivf->adapter) > 12) {
+ const guint8 *data = gst_adapter_peek (ivf->adapter, 12);
+ guint32 frame_size = GST_READ_UINT32_LE (data);
+ guint64 frame_pts = GST_READ_UINT64_LE (data + 4);
+
+ GST_LOG_OBJECT (ivf, "Read frame header: size %u, pts %u",
+ frame_size, frame_pts);
+
+ if (gst_adapter_available (ivf->adapter) >= 12 + frame_size) {
+ gst_adapter_flush (ivf->adapter, 12);
+
+ GstBuffer *frame = gst_adapter_take_buffer (ivf->adapter, frame_size);
+ gst_buffer_set_caps (frame, GST_PAD_CAPS (ivf->srcpad));
+ GST_BUFFER_TIMESTAMP (frame) =
+ gst_util_uint64_scale_int (GST_SECOND * frame_pts, ivf->rate_den,
+ ivf->rate_num);
+ GST_BUFFER_DURATION (frame) =
+ gst_util_uint64_scale_int (GST_SECOND, ivf->rate_den,
+ ivf->rate_num);
+
+ GST_DEBUG_OBJECT (ivf, "Pushing frame of size %u, ts %"
+ GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT ", off %"
+ G_GUINT64_FORMAT ", off_end %" G_GUINT64_FORMAT,
+ GST_BUFFER_SIZE (frame),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (frame)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (frame)),
+ GST_BUFFER_OFFSET (frame), GST_BUFFER_OFFSET_END (frame));
+
+ res = gst_pad_push (ivf->srcpad, frame);
+ if (res != GST_FLOW_OK)
+ break;
+ } else {
+ GST_LOG_OBJECT (ivf, "Frame data not yet available.");
+ break;
+ }
+ }
+ break;
+
+ default:
+ g_return_val_if_reached (GST_FLOW_ERROR);
+ }
+
+ return res;
+}
+
+/* typefinder for IVF + VP8 */
+static void
+ivf_typefind (GstTypeFind * tf, gpointer user_data)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 12);
+
+ if (data &&
+ GST_READ_UINT32_LE (data) == GST_MAKE_FOURCC ('D', 'K', 'I', 'F') &&
+ GST_READ_UINT32_LE (data + 8) == GST_MAKE_FOURCC ('V', 'P', '8', '0')) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
+ gst_caps_new_simple ("video/x-ivf", NULL));
+ }
+}
+
+/* entry point to initialize the plug-in */
+static gboolean
+ivfparse_init (GstPlugin * ivfparse)
+{
+ /* debug category for filtering log messages */
+ GST_DEBUG_CATEGORY_INIT (gst_ivfparse_debug, "ivfparse", 0, "IVF parser");
+
+ /* register parser element */
+ if (!gst_element_register (ivfparse, "ivfparse", GST_RANK_NONE,
+ GST_TYPE_IVFPARSE))
+ return FALSE;
+
+ /* register typefinder function */
+ if (!gst_type_find_register (ivfparse, "", GST_RANK_PRIMARY,
+ ivf_typefind, NULL,
+ gst_caps_new_simple ("video/x-ivf", NULL), NULL, NULL))
+ return FALSE;
+
+ return TRUE;
+}
+
+/* gstreamer looks for this structure to register plugins */
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "ivfparse",
+ "IVF parser",
+ ivfparse_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/gst/ivfparse/gstivfparse.h b/gst/ivfparse/gstivfparse.h
new file mode 100644
index 000000000..7fcdd17fe
--- /dev/null
+++ b/gst/ivfparse/gstivfparse.h
@@ -0,0 +1,73 @@
+/* -*- Mode: c; c-basic-offset: 2; indent-tabs-mode: nil -*- */
+/*
+ * GStreamer IVF parser
+ * (c) 2010 Opera Software ASA, Philip Jägenstedt <philipj@opera.com>
+ *
+ * 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_IVFPARSE_H__
+#define __GST_IVFPARSE_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_IVFPARSE \
+ (gst_ivfparse_get_type())
+#define GST_IVFPARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IVFPARSE,GstIvfParse))
+#define GST_IVFPARSE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IVFPARSE,GstIvfParseClass))
+#define GST_IS_IVFPARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IVFPARSE))
+#define GST_IS_IVFPARSE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IVFPARSE))
+
+typedef enum {
+ GST_IVFPARSE_START,
+ GST_IVFPARSE_DATA
+} GstIvfParseState;
+
+typedef struct _GstIvfParse GstIvfParse;
+typedef struct _GstIvfParseClass GstIvfParseClass;
+
+struct _GstIvfParse
+{
+ GstElement element;
+
+ GstPad *sinkpad, *srcpad;
+
+ GstAdapter *adapter;
+
+ GstIvfParseState state;
+
+ /* framerate */
+ guint rate_num;
+ guint rate_den;
+};
+
+struct _GstIvfParseClass
+{
+ GstElementClass parent_class;
+};
+
+GType gst_ivfparse_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_IVFPARSE_H__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 08:47:36 +0000