gstreamer/gst/gdp/gstgdppay.c
2011-02-14 15:51:08 +01:00

898 lines
26 KiB
C

/* GStreamer
* Copyright (C) 2006 Thomas Vander Stichele <thomas at apestaart dot org>
*
* 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-gdppay
* @see_also: gdpdepay
*
* This element payloads GStreamer buffers and events using the
* GStreamer Data Protocol.
*
* <refsect2>
* |[
* gst-launch -v -m videotestsrc num-buffers=50 ! gdppay ! filesink location=test.gdp
* ]| This pipeline creates a serialized video stream that can be played back
* with the example shown in gdpdepay.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/dataprotocol/dataprotocol.h>
#include "gstgdppay.h"
static GstStaticPadTemplate gdp_pay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gdp_pay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-gdp"));
GST_DEBUG_CATEGORY_STATIC (gst_gdp_pay_debug);
#define GST_CAT_DEFAULT gst_gdp_pay_debug
#define DEFAULT_CRC_HEADER TRUE
#define DEFAULT_CRC_PAYLOAD FALSE
#define DEFAULT_VERSION GST_DP_VERSION_1_0
enum
{
PROP_0,
PROP_CRC_HEADER,
PROP_CRC_PAYLOAD,
PROP_VERSION,
};
#define _do_init(x) \
GST_DEBUG_CATEGORY_INIT (gst_gdp_pay_debug, "gdppay", 0, \
"GDP payloader");
GST_BOILERPLATE_FULL (GstGDPPay, gst_gdp_pay, GstElement,
GST_TYPE_ELEMENT, _do_init);
static void gst_gdp_pay_reset (GstGDPPay * this);
static GstFlowReturn gst_gdp_pay_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_gdp_pay_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_gdp_pay_sink_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn gst_gdp_pay_change_state (GstElement *
element, GstStateChange transition);
static void gst_gdp_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gdp_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gdp_pay_finalize (GObject * gobject);
static void
gst_gdp_pay_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class,
"GDP Payloader", "GDP/Payloader",
"Payloads GStreamer Data Protocol buffers",
"Thomas Vander Stichele <thomas at apestaart dot org>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gdp_pay_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gdp_pay_src_template));
}
static void
gst_gdp_pay_class_init (GstGDPPayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_gdp_pay_set_property;
gobject_class->get_property = gst_gdp_pay_get_property;
gobject_class->finalize = gst_gdp_pay_finalize;
g_object_class_install_property (gobject_class, PROP_CRC_HEADER,
g_param_spec_boolean ("crc-header", "CRC Header",
"Calculate and store a CRC checksum on the header",
DEFAULT_CRC_HEADER, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CRC_PAYLOAD,
g_param_spec_boolean ("crc-payload", "CRC Payload",
"Calculate and store a CRC checksum on the payload",
DEFAULT_CRC_PAYLOAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_VERSION,
g_param_spec_enum ("version", "Version",
"Version of the GStreamer Data Protocol",
GST_TYPE_DP_VERSION, DEFAULT_VERSION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_gdp_pay_change_state);
}
static void
gst_gdp_pay_init (GstGDPPay * gdppay, GstGDPPayClass * g_class)
{
gdppay->sinkpad =
gst_pad_new_from_static_template (&gdp_pay_sink_template, "sink");
gst_pad_set_chain_function (gdppay->sinkpad,
GST_DEBUG_FUNCPTR (gst_gdp_pay_chain));
gst_pad_set_event_function (gdppay->sinkpad,
GST_DEBUG_FUNCPTR (gst_gdp_pay_sink_event));
gst_element_add_pad (GST_ELEMENT (gdppay), gdppay->sinkpad);
gdppay->srcpad =
gst_pad_new_from_static_template (&gdp_pay_src_template, "src");
gst_pad_set_event_function (gdppay->srcpad,
GST_DEBUG_FUNCPTR (gst_gdp_pay_src_event));
gst_element_add_pad (GST_ELEMENT (gdppay), gdppay->srcpad);
gdppay->crc_header = DEFAULT_CRC_HEADER;
gdppay->crc_payload = DEFAULT_CRC_PAYLOAD;
gdppay->header_flag = gdppay->crc_header | gdppay->crc_payload;
gdppay->version = DEFAULT_VERSION;
gdppay->offset = 0;
gdppay->packetizer = gst_dp_packetizer_new (gdppay->version);
}
static void
gst_gdp_pay_finalize (GObject * gobject)
{
GstGDPPay *this = GST_GDP_PAY (gobject);
gst_gdp_pay_reset (this);
gst_dp_packetizer_free (this->packetizer);
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (gobject));
}
static void
gst_gdp_pay_reset (GstGDPPay * this)
{
GST_DEBUG_OBJECT (this, "Resetting GDP object");
/* clear the queued buffers */
while (this->queue) {
GstBuffer *buffer;
buffer = GST_BUFFER_CAST (this->queue->data);
/* delete buffer from queue now */
this->queue = g_list_delete_link (this->queue, this->queue);
gst_buffer_unref (buffer);
}
if (this->caps) {
gst_caps_unref (this->caps);
this->caps = NULL;
}
if (this->caps_buf) {
gst_buffer_unref (this->caps_buf);
this->caps_buf = NULL;
}
if (this->tag_buf) {
gst_buffer_unref (this->tag_buf);
this->tag_buf = NULL;
}
if (this->new_segment_buf) {
gst_buffer_unref (this->new_segment_buf);
this->new_segment_buf = NULL;
}
this->sent_streamheader = FALSE;
this->offset = 0;
}
/* set OFFSET and OFFSET_END with running count */
static void
gst_gdp_stamp_buffer (GstGDPPay * this, GstBuffer * buffer)
{
GST_BUFFER_OFFSET (buffer) = this->offset;
GST_BUFFER_OFFSET_END (buffer) = this->offset + GST_BUFFER_SIZE (buffer);
this->offset = GST_BUFFER_OFFSET_END (buffer);
}
static GstBuffer *
gst_gdp_buffer_from_caps (GstGDPPay * this, GstCaps * caps)
{
GstBuffer *headerbuf;
GstBuffer *payloadbuf;
guint8 *header, *payload;
guint len;
if (!this->packetizer->packet_from_caps (caps, this->header_flag, &len,
&header, &payload))
goto packet_failed;
GST_LOG_OBJECT (this, "creating GDP header and payload buffer from caps");
headerbuf = gst_buffer_new ();
gst_buffer_set_data (headerbuf, header, len);
GST_BUFFER_MALLOCDATA (headerbuf) = header;
payloadbuf = gst_buffer_new ();
gst_buffer_set_data (payloadbuf, payload,
gst_dp_header_payload_length (header));
GST_BUFFER_MALLOCDATA (payloadbuf) = payload;
return gst_buffer_join (headerbuf, payloadbuf);
/* ERRORS */
packet_failed:
{
GST_WARNING_OBJECT (this, "could not create GDP header from caps");
return NULL;
}
}
static GstBuffer *
gst_gdp_pay_buffer_from_buffer (GstGDPPay * this, GstBuffer * buffer)
{
GstBuffer *headerbuf;
guint8 *header;
guint len;
if (!this->packetizer->header_from_buffer (buffer, this->header_flag, &len,
&header))
goto no_buffer;
GST_LOG_OBJECT (this, "creating GDP header and payload buffer from buffer");
headerbuf = gst_buffer_new ();
gst_buffer_set_data (headerbuf, header, len);
GST_BUFFER_MALLOCDATA (headerbuf) = header;
/* we do not want to lose the ref on the incoming buffer */
gst_buffer_ref (buffer);
return gst_buffer_join (headerbuf, buffer);
/* ERRORS */
no_buffer:
{
GST_WARNING_OBJECT (this, "could not create GDP header from buffer");
return NULL;
}
}
static GstBuffer *
gst_gdp_buffer_from_event (GstGDPPay * this, GstEvent * event)
{
GstBuffer *headerbuf;
GstBuffer *payloadbuf;
guint8 *header, *payload;
guint len;
gboolean ret;
ret =
this->packetizer->packet_from_event (event, this->header_flag, &len,
&header, &payload);
if (!ret)
goto no_event;
GST_LOG_OBJECT (this, "creating GDP header and payload buffer from event");
headerbuf = gst_buffer_new ();
gst_buffer_set_data (headerbuf, header, len);
GST_BUFFER_MALLOCDATA (headerbuf) = header;
payloadbuf = gst_buffer_new ();
gst_buffer_set_data (payloadbuf, payload,
gst_dp_header_payload_length (header));
GST_BUFFER_MALLOCDATA (payloadbuf) = payload;
return gst_buffer_join (headerbuf, payloadbuf);
/* ERRORS */
no_event:
{
GST_WARNING_OBJECT (this, "could not create GDP header from event %s (%d)",
gst_event_type_get_name (event->type), event->type);
return NULL;
}
}
/* set our caps with streamheader, based on the latest newsegment and caps,
* and (possibly) GDP-serialized buffers of the streamheaders on the src pad */
static GstFlowReturn
gst_gdp_pay_reset_streamheader (GstGDPPay * this)
{
GstCaps *caps;
/* We use copies of these to avoid circular refcounts */
GstBuffer *new_segment_buf, *caps_buf, *tag_buf;
GstStructure *structure;
GstFlowReturn r = GST_FLOW_OK;
gboolean version_one_zero = TRUE;
GValue array = { 0 };
GValue value = { 0 };
GST_DEBUG_OBJECT (this, "start");
/* In version 0.2, we didn't need or send new segment or tags */
if (this->version == GST_DP_VERSION_0_2)
version_one_zero = FALSE;
if (version_one_zero) {
if (!this->new_segment_buf || !this->caps_buf) {
GST_DEBUG_OBJECT (this, "1.0, missing new_segment or caps, returning");
return GST_FLOW_OK;
}
} else {
if (!this->caps_buf) {
GST_DEBUG_OBJECT (this, "0.2, missing caps, returning");
return GST_FLOW_OK;
}
}
/* put copies of the buffers in a fixed list
* Stamp the buffers with offset and offset_end as well.
* We do this here so the offsets match the order the buffers go out in */
g_value_init (&array, GST_TYPE_ARRAY);
if (version_one_zero) {
gst_gdp_stamp_buffer (this, this->new_segment_buf);
GST_DEBUG_OBJECT (this, "1.0, appending copy of new segment buffer %p",
this->new_segment_buf);
new_segment_buf = gst_buffer_copy (this->new_segment_buf);
gst_buffer_set_caps (new_segment_buf, NULL);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, new_segment_buf);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
gst_buffer_unref (new_segment_buf);
if (this->tag_buf) {
gst_gdp_stamp_buffer (this, this->tag_buf);
GST_DEBUG_OBJECT (this, "1.0, appending current tags buffer %p",
this->tag_buf);
tag_buf = this->tag_buf;
this->tag_buf = NULL;
gst_buffer_set_caps (tag_buf, NULL);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, tag_buf);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
gst_buffer_unref (tag_buf);
}
}
gst_gdp_stamp_buffer (this, this->caps_buf);
GST_DEBUG_OBJECT (this, "appending copy of caps buffer %p", this->caps_buf);
caps_buf = gst_buffer_copy (this->caps_buf);
gst_buffer_set_caps (caps_buf, NULL);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, caps_buf);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
gst_buffer_unref (caps_buf);
/* we also need to add GDP serializations of the streamheaders of the
* incoming caps */
structure = gst_caps_get_structure (this->caps, 0);
if (gst_structure_has_field (structure, "streamheader")) {
const GValue *sh;
GArray *buffers;
GstBuffer *buffer;
int i;
sh = gst_structure_get_value (structure, "streamheader");
buffers = g_value_peek_pointer (sh);
GST_DEBUG_OBJECT (this,
"Need to serialize %d incoming streamheader buffers on ours",
buffers->len);
for (i = 0; i < buffers->len; ++i) {
GValue *bufval;
GstBuffer *outbuffer;
bufval = &g_array_index (buffers, GValue, i);
buffer = g_value_peek_pointer (bufval);
/* this buffer is deserialized by gdpdepay as a regular buffer,
it needs IN_CAPS, because it's a streamheader - otherwise it
is mixed with regular data buffers */
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_IN_CAPS);
GST_BUFFER_OFFSET (buffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (buffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_TIMESTAMP (buffer) = GST_CLOCK_TIME_NONE;
outbuffer = gst_gdp_pay_buffer_from_buffer (this, buffer);
if (!outbuffer) {
g_value_unset (&array);
goto no_buffer;
}
/* Setting IN_CAPS as other GDP event buffers */
GST_DEBUG_OBJECT (this,
"Setting IN_CAPS flag on outgoing buffer %" GST_PTR_FORMAT,
outbuffer);
GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_IN_CAPS);
GST_BUFFER_OFFSET (outbuffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (outbuffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_TIMESTAMP (outbuffer) = GST_CLOCK_TIME_NONE;
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, outbuffer);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
gst_buffer_unref (outbuffer);
}
} else {
GST_DEBUG_OBJECT (this, "no streamheader to serialize");
}
GST_DEBUG_OBJECT (this, "%d serialized buffers on streamheaders",
gst_value_array_get_size (&array));
caps = gst_caps_from_string ("application/x-gdp");
structure = gst_caps_get_structure (caps, 0);
gst_structure_set_value (structure, "streamheader", &array);
g_value_unset (&array);
GST_DEBUG_OBJECT (this, "Setting caps on src pad %" GST_PTR_FORMAT, caps);
gst_pad_set_caps (this->srcpad, caps);
this->caps_buf = gst_buffer_make_metadata_writable (this->caps_buf);
gst_buffer_set_caps (this->caps_buf, caps);
this->new_segment_buf =
gst_buffer_make_metadata_writable (this->new_segment_buf);
gst_buffer_set_caps (this->new_segment_buf, caps);
/* if these are our first ever buffers, send out new_segment first */
if (!this->sent_streamheader) {
GstEvent *event =
gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES, 0, -1, 0);
GST_DEBUG_OBJECT (this, "Sending out new_segment event %p", event);
if (!gst_pad_push_event (this->srcpad, event)) {
GST_WARNING_OBJECT (this, "pushing new segment failed");
r = GST_FLOW_ERROR;
goto done;
}
}
/* push out these streamheader buffers, then flush our internal queue */
GST_DEBUG_OBJECT (this, "Pushing GDP new_segment buffer %p with offset %"
G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT, this->new_segment_buf,
GST_BUFFER_OFFSET (this->new_segment_buf),
GST_BUFFER_OFFSET_END (this->new_segment_buf));
/* we stored these bufs with refcount 1, so make sure we keep a ref */
r = gst_pad_push (this->srcpad, gst_buffer_ref (this->new_segment_buf));
if (r != GST_FLOW_OK) {
GST_WARNING_OBJECT (this, "pushing GDP newsegment buffer returned %d", r);
goto done;
}
if (this->tag_buf) {
gst_buffer_set_caps (this->tag_buf, caps);
GST_DEBUG_OBJECT (this, "Pushing GDP tag buffer %p", this->tag_buf);
/* we stored these bufs with refcount 1, so make sure we keep a ref */
r = gst_pad_push (this->srcpad, gst_buffer_ref (this->tag_buf));
if (r != GST_FLOW_OK) {
GST_WARNING_OBJECT (this, "pushing GDP tag buffer returned %d", r);
goto done;
}
}
GST_DEBUG_OBJECT (this, "Pushing GDP caps buffer %p", this->caps_buf);
r = gst_pad_push (this->srcpad, gst_buffer_ref (this->caps_buf));
if (r != GST_FLOW_OK) {
GST_WARNING_OBJECT (this, "pushing GDP caps buffer returned %d", r);
goto done;
}
this->sent_streamheader = TRUE;
GST_DEBUG_OBJECT (this, "need to push %d queued buffers",
g_list_length (this->queue));
while (this->queue) {
GstBuffer *buffer;
buffer = GST_BUFFER_CAST (this->queue->data);
GST_DEBUG_OBJECT (this, "Pushing queued GDP buffer %p", buffer);
/* delete buffer from queue now */
this->queue = g_list_delete_link (this->queue, this->queue);
/* set caps and push */
gst_buffer_set_caps (buffer, caps);
r = gst_pad_push (this->srcpad, buffer);
if (r != GST_FLOW_OK) {
GST_WARNING_OBJECT (this, "pushing queued GDP buffer returned %d", r);
goto done;
}
}
done:
gst_caps_unref (caps);
GST_DEBUG_OBJECT (this, "stop");
return r;
/* ERRORS */
no_buffer:
{
GST_ELEMENT_ERROR (this, STREAM, FORMAT, (NULL),
("failed to create GDP buffer from streamheader"));
return GST_FLOW_ERROR;
}
}
/* queue a buffer internally if we haven't sent streamheader buffers yet;
* otherwise, just push on, this takes ownership of the buffer. */
static GstFlowReturn
gst_gdp_queue_buffer (GstGDPPay * this, GstBuffer * buffer)
{
if (this->sent_streamheader) {
GST_LOG_OBJECT (this, "Pushing GDP buffer %p, caps %" GST_PTR_FORMAT,
buffer, this->caps);
gst_buffer_set_caps (buffer, GST_PAD_CAPS (this->srcpad));
return gst_pad_push (this->srcpad, buffer);
}
/* store it on an internal queue. buffer remains reffed. */
this->queue = g_list_append (this->queue, buffer);
GST_DEBUG_OBJECT (this, "streamheader not sent yet, "
"queued buffer %p, now %d buffers queued",
buffer, g_list_length (this->queue));
return GST_FLOW_OK;
}
static GstFlowReturn
gst_gdp_pay_chain (GstPad * pad, GstBuffer * buffer)
{
GstGDPPay *this;
GstCaps *caps;
GstBuffer *outbuffer;
GstFlowReturn ret;
this = GST_GDP_PAY (gst_pad_get_parent (pad));
/* we should have received a new_segment before, otherwise it's a bug.
* fake one in that case */
if (!this->new_segment_buf) {
GstEvent *event;
GST_WARNING_OBJECT (this,
"did not receive new-segment before first buffer");
event = gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES, 0, -1, 0);
outbuffer = gst_gdp_buffer_from_event (this, event);
gst_event_unref (event);
/* GDP 0.2 doesn't know about new-segment, so this is not fatal */
if (!outbuffer) {
GST_ELEMENT_WARNING (this, STREAM, ENCODE, (NULL),
("Could not create GDP buffer from new segment event"));
} else {
GST_BUFFER_TIMESTAMP (outbuffer) = GST_BUFFER_TIMESTAMP (buffer);
GST_BUFFER_DURATION (outbuffer) = 0;
GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_IN_CAPS);
GST_DEBUG_OBJECT (this, "Storing buffer %p as new_segment_buf",
outbuffer);
this->new_segment_buf = outbuffer;
}
}
/* make sure we've received caps before */
caps = gst_buffer_get_caps (buffer);
if (!this->caps && !caps)
goto no_caps;
/* if the caps have changed, process caps first */
if (caps && !gst_caps_is_equal (this->caps, caps)) {
GST_LOG_OBJECT (this, "caps changed to %p, %" GST_PTR_FORMAT, caps, caps);
gst_caps_replace (&(this->caps), caps);
outbuffer = gst_gdp_buffer_from_caps (this, caps);
if (!outbuffer)
goto no_caps_buffer;
GST_BUFFER_TIMESTAMP (outbuffer) = GST_BUFFER_TIMESTAMP (buffer);
GST_BUFFER_DURATION (outbuffer) = 0;
GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_IN_CAPS);
if (this->caps_buf)
gst_buffer_unref (this->caps_buf);
this->caps_buf = outbuffer;
gst_gdp_pay_reset_streamheader (this);
}
if (caps)
gst_caps_unref (caps);
/* create a GDP header packet,
* then create a GST buffer of the header packet and the buffer contents */
outbuffer = gst_gdp_pay_buffer_from_buffer (this, buffer);
if (!outbuffer)
goto no_buffer;
/* If the incoming buffer is IN_CAPS, that means we have it on the caps
* as streamheader, and we have serialized a GDP version of it and put it
* on our caps */
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_IN_CAPS)) {
GST_DEBUG_OBJECT (this, "Setting IN_CAPS flag on outgoing buffer %p",
outbuffer);
GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_IN_CAPS);
}
gst_gdp_stamp_buffer (this, outbuffer);
GST_BUFFER_TIMESTAMP (outbuffer) = GST_BUFFER_TIMESTAMP (buffer);
GST_BUFFER_DURATION (outbuffer) = GST_BUFFER_DURATION (buffer);
ret = gst_gdp_queue_buffer (this, outbuffer);
done:
gst_buffer_unref (buffer);
gst_object_unref (this);
return ret;
/* ERRORS */
no_caps:
{
/* when returning a fatal error as a GstFlowReturn we must post an error
* message */
GST_ELEMENT_ERROR (this, STREAM, FORMAT, (NULL),
("first received buffer does not have caps set"));
if (caps)
gst_caps_unref (caps);
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
no_caps_buffer:
{
GST_ELEMENT_ERROR (this, STREAM, ENCODE, (NULL),
("Could not create GDP buffer from caps %" GST_PTR_FORMAT, caps));
gst_caps_unref (caps);
ret = GST_FLOW_ERROR;
goto done;
}
no_buffer:
{
GST_ELEMENT_ERROR (this, STREAM, ENCODE, (NULL),
("Could not create GDP buffer from buffer"));
ret = GST_FLOW_ERROR;
goto done;
}
}
static gboolean
gst_gdp_pay_sink_event (GstPad * pad, GstEvent * event)
{
GstBuffer *outbuffer;
GstGDPPay *this = GST_GDP_PAY (gst_pad_get_parent (pad));
GstFlowReturn flowret;
gboolean ret = TRUE;
GST_DEBUG_OBJECT (this, "received event %p of type %s (%d)",
event, gst_event_type_get_name (event->type), event->type);
/* now turn the event into a buffer */
outbuffer = gst_gdp_buffer_from_event (this, event);
if (!outbuffer)
goto no_outbuffer;
GST_BUFFER_TIMESTAMP (outbuffer) = GST_EVENT_TIMESTAMP (event);
GST_BUFFER_DURATION (outbuffer) = 0;
/* if we got a new segment or tag event, we should put it on our streamheader,
* and not send it on */
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
GST_DEBUG_OBJECT (this, "Storing in caps buffer %p as new_segment_buf",
outbuffer);
if (this->new_segment_buf)
gst_buffer_unref (this->new_segment_buf);
this->new_segment_buf = outbuffer;
GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_IN_CAPS);
gst_gdp_pay_reset_streamheader (this);
break;
case GST_EVENT_TAG:
GST_DEBUG_OBJECT (this, "Storing in caps buffer %p as tag_buf",
outbuffer);
if (this->tag_buf)
gst_buffer_unref (this->tag_buf);
this->tag_buf = outbuffer;
GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_IN_CAPS);
gst_gdp_pay_reset_streamheader (this);
break;
default:
GST_DEBUG_OBJECT (this, "queuing GDP buffer %p of event %p", outbuffer,
event);
flowret = gst_gdp_queue_buffer (this, outbuffer);
if (flowret != GST_FLOW_OK)
goto push_error;
break;
}
/* if we have EOS, we should send on EOS ourselves */
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
GST_DEBUG_OBJECT (this, "Sending on EOS event %p", event);
/* ref, we unref later again */
ret = gst_pad_push_event (this->srcpad, gst_event_ref (event));
}
done:
gst_event_unref (event);
gst_object_unref (this);
return ret;
/* ERRORS */
no_outbuffer:
{
GST_ELEMENT_WARNING (this, STREAM, ENCODE, (NULL),
("Could not create GDP buffer from received event (type %s)",
gst_event_type_get_name (event->type)));
ret = FALSE;
goto done;
}
push_error:
{
GST_WARNING_OBJECT (this, "queueing GDP event buffer returned %d", flowret);
ret = FALSE;
goto done;
}
}
static gboolean
gst_gdp_pay_src_event (GstPad * pad, GstEvent * event)
{
GstGDPPay *this;
gboolean res = TRUE;
this = GST_GDP_PAY (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* we refuse seek for now. */
gst_event_unref (event);
res = FALSE;
break;
case GST_EVENT_QOS:
case GST_EVENT_NAVIGATION:
default:
/* everything else is passed */
res = gst_pad_push_event (this->sinkpad, event);
break;
}
gst_object_unref (this);
return res;
}
static void
gst_gdp_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGDPPay *this;
g_return_if_fail (GST_IS_GDP_PAY (object));
this = GST_GDP_PAY (object);
switch (prop_id) {
case PROP_CRC_HEADER:
this->crc_header =
g_value_get_boolean (value) ? GST_DP_HEADER_FLAG_CRC_HEADER : 0;
this->header_flag = this->crc_header | this->crc_payload;
break;
case PROP_CRC_PAYLOAD:
this->crc_payload =
g_value_get_boolean (value) ? GST_DP_HEADER_FLAG_CRC_PAYLOAD : 0;
this->header_flag = this->crc_header | this->crc_payload;
break;
case PROP_VERSION:
this->version = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gdp_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGDPPay *this;
g_return_if_fail (GST_IS_GDP_PAY (object));
this = GST_GDP_PAY (object);
switch (prop_id) {
case PROP_CRC_HEADER:
g_value_set_boolean (value, this->crc_header);
break;
case PROP_CRC_PAYLOAD:
g_value_set_boolean (value, this->crc_payload);
break;
case PROP_VERSION:
g_value_set_enum (value, this->version);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_gdp_pay_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstGDPPay *this = GST_GDP_PAY (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_gdp_pay_reset (this);
break;
default:
break;
}
return ret;
}
gboolean
gst_gdp_pay_plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "gdppay", GST_RANK_NONE, GST_TYPE_GDP_PAY))
return FALSE;
return TRUE;
}