mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 09:00:54 +00:00
298 lines
8.9 KiB
C
298 lines
8.9 KiB
C
/* -*- 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;
|
|
|
|
gst_pad_push_event (ivf->srcpad, gst_event_new_new_segment (FALSE, 1.0,
|
|
GST_FORMAT_TIME, 0, -1, 0));
|
|
|
|
/* 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 %" G_GUINT64_FORMAT,
|
|
frame_size, frame_pts);
|
|
|
|
if (gst_adapter_available (ivf->adapter) >= 12 + frame_size) {
|
|
GstBuffer *frame;
|
|
|
|
gst_adapter_flush (ivf->adapter, 12);
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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_PRIMARY,
|
|
GST_TYPE_IVFPARSE))
|
|
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)
|