mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
424 lines
12 KiB
C
424 lines
12 KiB
C
/*
|
|
* GStreamer
|
|
* Copyright (c) 2005 INdT.
|
|
* @author Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>
|
|
* @author Rob Taylor <robtaylor@fastmail.fm>
|
|
* @author Philippe Khalaf <burger@speedy.org>
|
|
* @author Ole André Vadla Ravnås <oleavr@gmail.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.
|
|
*/
|
|
/**
|
|
* SECTION:element-mimdec
|
|
* @see_also: mimenc
|
|
*
|
|
* The MIMIC codec is used by MSN Messenger's webcam support. It consumes the
|
|
* TCP header for the MIMIC codec.
|
|
*
|
|
* Its fourcc is ML20.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
|
|
#include "gstmimdec.h"
|
|
|
|
GST_DEBUG_CATEGORY (mimdec_debug);
|
|
#define GST_CAT_DEFAULT (mimdec_debug)
|
|
|
|
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/x-mimic")
|
|
);
|
|
|
|
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/x-raw-rgb, "
|
|
"bpp = (int) 24, "
|
|
"depth = (int) 24, "
|
|
"endianness = (int) 4321, "
|
|
"framerate = (fraction) [ 0/1, 30/1 ], "
|
|
"red_mask = (int) 16711680, "
|
|
"green_mask = (int) 65280, "
|
|
"blue_mask = (int) 255, "
|
|
"height = (int) [16, 4096], " "width = (int) [16, 4096]")
|
|
);
|
|
|
|
static void gst_mimdec_finalize (GObject * object);
|
|
|
|
static GstFlowReturn gst_mimdec_chain (GstPad * pad, GstBuffer * in);
|
|
static GstStateChangeReturn
|
|
gst_mimdec_change_state (GstElement * element, GstStateChange transition);
|
|
|
|
static gboolean gst_mimdec_sink_event (GstPad * pad, GstEvent * event);
|
|
|
|
|
|
GST_BOILERPLATE (GstMimDec, gst_mimdec, GstElement, GST_TYPE_ELEMENT);
|
|
|
|
static void
|
|
gst_mimdec_base_init (gpointer klass)
|
|
{
|
|
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
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));
|
|
|
|
gst_element_class_set_details_simple (element_class, "MimDec",
|
|
"Codec/Decoder/Video",
|
|
"Mimic decoder",
|
|
"Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>, "
|
|
"Rob Taylor <robtaylor@fastmail.fm>, "
|
|
"Philippe Khalaf <burger@speedy.org>, "
|
|
"Ole André Vadla Ravnås <oleavr@gmail.com>");
|
|
}
|
|
|
|
static void
|
|
gst_mimdec_class_init (GstMimDecClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gstelement_class = (GstElementClass *) klass;
|
|
gstelement_class->change_state = gst_mimdec_change_state;
|
|
|
|
gobject_class->finalize = gst_mimdec_finalize;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (mimdec_debug, "mimdec", 0, "Mimic decoder plugin");
|
|
}
|
|
|
|
static void
|
|
gst_mimdec_init (GstMimDec * mimdec, GstMimDecClass * klass)
|
|
{
|
|
mimdec->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
|
|
gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->sinkpad);
|
|
gst_pad_set_chain_function (mimdec->sinkpad, gst_mimdec_chain);
|
|
gst_pad_set_event_function (mimdec->sinkpad, gst_mimdec_sink_event);
|
|
|
|
mimdec->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
|
|
gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->srcpad);
|
|
|
|
mimdec->adapter = gst_adapter_new ();
|
|
|
|
mimdec->dec = NULL;
|
|
mimdec->buffer_size = -1;
|
|
mimdec->have_header = FALSE;
|
|
mimdec->payload_size = -1;
|
|
mimdec->current_ts = -1;
|
|
}
|
|
|
|
static void
|
|
gst_mimdec_finalize (GObject * object)
|
|
{
|
|
GstMimDec *mimdec = GST_MIMDEC (object);
|
|
|
|
gst_adapter_clear (mimdec->adapter);
|
|
g_object_unref (mimdec->adapter);
|
|
|
|
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mimdec_chain (GstPad * pad, GstBuffer * in)
|
|
{
|
|
GstMimDec *mimdec;
|
|
GstBuffer *out_buf, *buf;
|
|
guchar *header, *frame_body;
|
|
guint32 fourcc;
|
|
guint16 header_size;
|
|
gint width, height;
|
|
GstCaps *caps;
|
|
GstFlowReturn res = GST_FLOW_OK;
|
|
GstClockTime in_time = GST_BUFFER_TIMESTAMP (in);
|
|
|
|
GST_DEBUG ("in gst_mimdec_chain");
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
|
|
mimdec = GST_MIMDEC (gst_pad_get_parent (pad));
|
|
g_return_val_if_fail (GST_IS_MIMDEC (mimdec), GST_FLOW_ERROR);
|
|
|
|
buf = GST_BUFFER (in);
|
|
gst_adapter_push (mimdec->adapter, buf);
|
|
|
|
GST_OBJECT_LOCK (mimdec);
|
|
|
|
// do we have enough bytes to read a header
|
|
while (gst_adapter_available (mimdec->adapter) >=
|
|
(mimdec->have_header ? mimdec->payload_size : 24)) {
|
|
if (!mimdec->have_header) {
|
|
header = (guchar *) gst_adapter_peek (mimdec->adapter, 24);
|
|
header_size = header[0];
|
|
if (header_size != 24) {
|
|
GST_WARNING_OBJECT (mimdec,
|
|
"invalid frame: header size %d incorrect", header_size);
|
|
gst_adapter_flush (mimdec->adapter, 24);
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
if (header[1] == 1) {
|
|
/* This is a a paused frame, skip it */
|
|
gst_adapter_flush (mimdec->adapter, 24);
|
|
continue;
|
|
}
|
|
|
|
fourcc = GUINT32_FROM_LE (*((guint32 *) (header + 12)));
|
|
if (GST_MAKE_FOURCC ('M', 'L', '2', '0') != fourcc) {
|
|
GST_WARNING_OBJECT (mimdec, "invalid frame: unknown FOURCC code"
|
|
" %X (%" GST_FOURCC_FORMAT ")", fourcc, GST_FOURCC_ARGS (fourcc));
|
|
gst_adapter_flush (mimdec->adapter, 24);
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
mimdec->payload_size = GUINT32_FROM_LE (*((guint32 *) (header + 8)));
|
|
|
|
mimdec->current_ts = GUINT32_FROM_LE (*((guint32 *) (header + 20)));
|
|
|
|
GST_DEBUG ("Got packet, payload size %d", mimdec->payload_size);
|
|
|
|
gst_adapter_flush (mimdec->adapter, 24);
|
|
|
|
mimdec->have_header = TRUE;
|
|
}
|
|
|
|
if (gst_adapter_available (mimdec->adapter) < mimdec->payload_size) {
|
|
goto out;
|
|
}
|
|
|
|
frame_body =
|
|
(guchar *) gst_adapter_peek (mimdec->adapter, mimdec->payload_size);
|
|
|
|
if (mimdec->dec == NULL) {
|
|
GstEvent *event = NULL;
|
|
gboolean result = TRUE;
|
|
|
|
/* Check if its a keyframe, otherwise skip it */
|
|
if (GUINT32_FROM_LE (*((guint32 *) (frame_body + 12))) != 0) {
|
|
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
|
|
mimdec->have_header = FALSE;
|
|
res = GST_FLOW_OK;
|
|
goto out;
|
|
}
|
|
|
|
mimdec->dec = mimic_open ();
|
|
if (mimdec->dec == NULL) {
|
|
GST_WARNING_OBJECT (mimdec, "mimic_open error\n");
|
|
|
|
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
|
|
mimdec->have_header = FALSE;
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
if (!mimic_decoder_init (mimdec->dec, frame_body)) {
|
|
GST_WARNING_OBJECT (mimdec, "mimic_decoder_init error\n");
|
|
mimic_close (mimdec->dec);
|
|
mimdec->dec = NULL;
|
|
|
|
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
|
|
mimdec->have_header = FALSE;
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
if (!mimic_get_property (mimdec->dec, "buffer_size",
|
|
&mimdec->buffer_size)) {
|
|
GST_WARNING_OBJECT (mimdec,
|
|
"mimic_get_property('buffer_size') error\n");
|
|
mimic_close (mimdec->dec);
|
|
mimdec->dec = NULL;
|
|
|
|
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
|
|
mimdec->have_header = FALSE;
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
if (mimdec->need_newsegment)
|
|
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
|
|
mimdec->current_ts * GST_MSECOND, -1, 0);
|
|
mimdec->need_newsegment = FALSE;
|
|
GST_OBJECT_UNLOCK (mimdec);
|
|
if (event)
|
|
result = gst_pad_push_event (mimdec->srcpad, event);
|
|
GST_OBJECT_LOCK (mimdec);
|
|
if (!result) {
|
|
GST_WARNING_OBJECT (mimdec, "gst_pad_push_event failed");
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out_buf = gst_buffer_new_and_alloc (mimdec->buffer_size);
|
|
|
|
if (!mimic_decode_frame (mimdec->dec, frame_body,
|
|
GST_BUFFER_DATA (out_buf))) {
|
|
GST_WARNING_OBJECT (mimdec, "mimic_decode_frame error\n");
|
|
|
|
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
|
|
mimdec->have_header = FALSE;
|
|
|
|
gst_buffer_unref (out_buf);
|
|
res = GST_FLOW_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (in_time))
|
|
GST_BUFFER_TIMESTAMP (out_buf) = in_time;
|
|
else
|
|
GST_BUFFER_TIMESTAMP (out_buf) = mimdec->current_ts * GST_MSECOND;
|
|
|
|
mimic_get_property (mimdec->dec, "width", &width);
|
|
mimic_get_property (mimdec->dec, "height", &height);
|
|
GST_DEBUG_OBJECT (mimdec,
|
|
"got WxH %d x %d payload size %d buffer_size %d",
|
|
width, height, mimdec->payload_size, mimdec->buffer_size);
|
|
caps = gst_caps_new_simple ("video/x-raw-rgb",
|
|
"bpp", G_TYPE_INT, 24,
|
|
"depth", G_TYPE_INT, 24,
|
|
"endianness", G_TYPE_INT, 4321,
|
|
"framerate", GST_TYPE_FRACTION, 7, 1,
|
|
"red_mask", G_TYPE_INT, 16711680,
|
|
"green_mask", G_TYPE_INT, 65280,
|
|
"blue_mask", G_TYPE_INT, 255,
|
|
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
|
|
gst_buffer_set_caps (out_buf, caps);
|
|
gst_caps_unref (caps);
|
|
GST_OBJECT_UNLOCK (mimdec);
|
|
res = gst_pad_push (mimdec->srcpad, out_buf);
|
|
GST_OBJECT_LOCK (mimdec);
|
|
|
|
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
|
|
mimdec->have_header = FALSE;
|
|
}
|
|
|
|
out:
|
|
GST_OBJECT_UNLOCK (mimdec);
|
|
gst_object_unref (mimdec);
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_mimdec_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstMimDec *mimdec;
|
|
|
|
mimdec = GST_MIMDEC (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
GST_OBJECT_LOCK (element);
|
|
if (mimdec->dec != NULL) {
|
|
mimic_close (mimdec->dec);
|
|
mimdec->dec = NULL;
|
|
mimdec->buffer_size = -1;
|
|
mimdec->have_header = FALSE;
|
|
mimdec->payload_size = -1;
|
|
mimdec->current_ts = -1;
|
|
}
|
|
GST_OBJECT_UNLOCK (element);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_OBJECT_LOCK (element);
|
|
mimdec->need_newsegment = TRUE;
|
|
GST_OBJECT_UNLOCK (element);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
}
|
|
|
|
static gboolean
|
|
gst_mimdec_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean res = TRUE;
|
|
GstMimDec *mimdec = GST_MIMDEC (gst_pad_get_parent (pad));
|
|
|
|
/*
|
|
* Ignore upstream newsegment event, its EVIL, we should implement
|
|
* proper seeking instead
|
|
*/
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
gboolean update;
|
|
GstFormat format;
|
|
gdouble rate, arate;
|
|
gint64 start, stop, time;
|
|
|
|
gst_event_parse_new_segment_full (event, &update, &rate, &arate,
|
|
&format, &start, &stop, &time);
|
|
|
|
/* we need TIME and a positive rate */
|
|
if (format != GST_FORMAT_TIME)
|
|
goto newseg_wrong_format;
|
|
|
|
if (rate <= 0.0)
|
|
goto newseg_wrong_rate;
|
|
|
|
GST_OBJECT_LOCK (mimdec);
|
|
mimdec->need_newsegment = FALSE;
|
|
GST_OBJECT_UNLOCK (mimdec);
|
|
|
|
res = gst_pad_push_event (mimdec->srcpad, event);
|
|
}
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_OBJECT_LOCK (mimdec);
|
|
mimdec->need_newsegment = TRUE;
|
|
GST_OBJECT_UNLOCK (mimdec);
|
|
|
|
res = gst_pad_push_event (mimdec->srcpad, event);
|
|
break;
|
|
default:
|
|
res = gst_pad_push_event (mimdec->srcpad, event);
|
|
break;
|
|
}
|
|
|
|
done:
|
|
|
|
gst_object_unref (mimdec);
|
|
|
|
return res;
|
|
|
|
newseg_wrong_format:
|
|
{
|
|
GST_DEBUG_OBJECT (mimdec, "received non TIME newsegment");
|
|
gst_event_unref (event);
|
|
goto done;
|
|
}
|
|
newseg_wrong_rate:
|
|
{
|
|
GST_DEBUG_OBJECT (mimdec, "negative rates not supported yet");
|
|
gst_event_unref (event);
|
|
goto done;
|
|
}
|
|
|
|
|
|
}
|