diff options
Diffstat (limited to 'gst/gdp/gstgdpdepay.c')
| -rw-r--r-- | gst/gdp/gstgdpdepay.c | 457 |
1 files changed, 0 insertions, 457 deletions
diff --git a/gst/gdp/gstgdpdepay.c b/gst/gdp/gstgdpdepay.c deleted file mode 100644 index 98d584c4..00000000 --- a/gst/gdp/gstgdpdepay.c +++ /dev/null @@ -1,457 +0,0 @@ -/* 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-gdpdepay - * @see_also: gdppay - * - * <refsect2> - * <para> - * This element depayloads GStreamer Data Protocol buffers back to deserialized - * buffers and events. - * </para> - * <para> - * <programlisting> - * gst-launch -v -m filesrc location=test.gdp ! gdpdepay ! xvimagesink - * </programlisting> - * This pipeline plays back a serialized video stream as created in the - * example for gdppay. - * </para> - * </refsect2> - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <string.h> - -#include <gst/dataprotocol/dataprotocol.h> - -#include "gstgdpdepay.h" - -/* elementfactory information */ -static const GstElementDetails gdp_depay_details = -GST_ELEMENT_DETAILS ("GDP Depayloader", - "GDP/Depayloader", - "Depayloads GStreamer Data Protocol buffers", - "Thomas Vander Stichele <thomas at apestaart dot org>"); - -enum -{ - PROP_0, -}; - -static GstStaticPadTemplate gdp_depay_sink_template = -GST_STATIC_PAD_TEMPLATE ("sink", - GST_PAD_SINK, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("application/x-gdp")); - -static GstStaticPadTemplate gdp_depay_src_template = -GST_STATIC_PAD_TEMPLATE ("src", - GST_PAD_SRC, - GST_PAD_ALWAYS, - GST_STATIC_CAPS_ANY); - -GST_DEBUG_CATEGORY_STATIC (gst_gdp_depay_debug); -#define GST_CAT_DEFAULT gst_gdp_depay_debug - -#define _do_init(x) \ - GST_DEBUG_CATEGORY_INIT (gst_gdp_depay_debug, "gdpdepay", 0, \ - "GDP depayloader"); - -GST_BOILERPLATE_FULL (GstGDPDepay, gst_gdp_depay, GstElement, - GST_TYPE_ELEMENT, _do_init); - -static gboolean gst_gdp_depay_sink_event (GstPad * pad, GstEvent * event); -static gboolean gst_gdp_depay_src_event (GstPad * pad, GstEvent * event); - -static GstFlowReturn gst_gdp_depay_chain (GstPad * pad, GstBuffer * buffer); - -static GstStateChangeReturn gst_gdp_depay_change_state (GstElement * - element, GstStateChange transition); - -static void gst_gdp_depay_finalize (GObject * object); - -static void -gst_gdp_depay_base_init (gpointer g_class) -{ - GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); - - gst_element_class_set_details (element_class, &gdp_depay_details); - - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&gdp_depay_sink_template)); - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&gdp_depay_src_template)); -} - -static void -gst_gdp_depay_class_init (GstGDPDepayClass * klass) -{ - GObjectClass *gobject_class; - GstElementClass *gstelement_class; - - gobject_class = (GObjectClass *) klass; - gstelement_class = (GstElementClass *) klass; - - gstelement_class->change_state = - GST_DEBUG_FUNCPTR (gst_gdp_depay_change_state); - gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gdp_depay_finalize); -} - -static void -gst_gdp_depay_init (GstGDPDepay * gdpdepay, GstGDPDepayClass * g_class) -{ - gdpdepay->sinkpad = - gst_pad_new_from_static_template (&gdp_depay_sink_template, "sink"); - gst_pad_set_chain_function (gdpdepay->sinkpad, - GST_DEBUG_FUNCPTR (gst_gdp_depay_chain)); - gst_pad_set_event_function (gdpdepay->sinkpad, - GST_DEBUG_FUNCPTR (gst_gdp_depay_sink_event)); - gst_element_add_pad (GST_ELEMENT (gdpdepay), gdpdepay->sinkpad); - - gdpdepay->srcpad = - gst_pad_new_from_static_template (&gdp_depay_src_template, "src"); - gst_pad_set_event_function (gdpdepay->srcpad, - GST_DEBUG_FUNCPTR (gst_gdp_depay_src_event)); - /* our caps will always be decided by the incoming GDP caps buffers */ - gst_pad_use_fixed_caps (gdpdepay->srcpad); - gst_element_add_pad (GST_ELEMENT (gdpdepay), gdpdepay->srcpad); - - gdpdepay->adapter = gst_adapter_new (); -} - -static void -gst_gdp_depay_finalize (GObject * gobject) -{ - GstGDPDepay *this; - - this = GST_GDP_DEPAY (gobject); - if (this->caps) - gst_caps_unref (this->caps); - g_free (this->header); - gst_adapter_clear (this->adapter); - g_object_unref (this->adapter); - - GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (gobject)); -} - -static gboolean -gst_gdp_depay_sink_event (GstPad * pad, GstEvent * event) -{ - GstGDPDepay *this; - gboolean res = TRUE; - - this = GST_GDP_DEPAY (gst_pad_get_parent (pad)); - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_FLUSH_START: - case GST_EVENT_FLUSH_STOP: - /* forward flush start and stop */ - res = gst_pad_push_event (this->srcpad, event); - break; - case GST_EVENT_EOS: - /* after EOS, we don't expect to output anything anymore */ - res = gst_pad_push_event (this->srcpad, event); - break; - case GST_EVENT_NEWSEGMENT: - case GST_EVENT_TAG: - case GST_EVENT_BUFFERSIZE: - default: - /* we unref most events as we take them from the datastream */ - gst_event_unref (event); - break; - } - gst_object_unref (this); - - return res; -} - -static gboolean -gst_gdp_depay_src_event (GstPad * pad, GstEvent * event) -{ - GstGDPDepay *this; - gboolean res = TRUE; - - this = GST_GDP_DEPAY (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 GstFlowReturn -gst_gdp_depay_chain (GstPad * pad, GstBuffer * buffer) -{ - GstGDPDepay *this; - GstFlowReturn ret = GST_FLOW_OK; - GstCaps *caps; - GstBuffer *buf; - GstEvent *event; - guint available; - - this = GST_GDP_DEPAY (gst_pad_get_parent (pad)); - - /* On DISCONT, get rid of accumulated data. We assume a buffer after the - * DISCONT contains (part of) a new valid header, if not we error because we - * lost sync */ - if (GST_BUFFER_IS_DISCONT (buffer)) { - gst_adapter_clear (this->adapter); - this->state = GST_GDP_DEPAY_STATE_HEADER; - } - gst_adapter_push (this->adapter, buffer); - - while (TRUE) { - switch (this->state) { - case GST_GDP_DEPAY_STATE_HEADER: - { - guint8 *header; - - /* collect a complete header, validate and store the header. Figure out - * the payload length and switch to the PAYLOAD state */ - available = gst_adapter_available (this->adapter); - if (available < GST_DP_HEADER_LENGTH) - goto done; - - GST_LOG_OBJECT (this, "reading GDP header from adapter"); - header = gst_adapter_take (this->adapter, GST_DP_HEADER_LENGTH); - if (!gst_dp_validate_header (GST_DP_HEADER_LENGTH, header)) { - g_free (header); - goto header_validate_error; - } - - /* store types and payload length. Also store the header, which we need - * to make the payload. */ - this->payload_length = gst_dp_header_payload_length (header); - this->payload_type = gst_dp_header_payload_type (header); - /* free previous header and store new one. */ - g_free (this->header); - this->header = header; - - GST_LOG_OBJECT (this, - "read GDP header, payload size %d, switching to state PAYLOAD", - this->payload_length); - this->state = GST_GDP_DEPAY_STATE_PAYLOAD; - break; - } - case GST_GDP_DEPAY_STATE_PAYLOAD: - { - /* in this state we wait for all the payload data to be available in the - * adapter. Then we switch to the state where we actually process the - * payload. */ - available = gst_adapter_available (this->adapter); - if (available < this->payload_length) - goto done; - - /* change state based on type */ - if (this->payload_type == GST_DP_PAYLOAD_BUFFER) { - GST_LOG_OBJECT (this, "switching to state BUFFER"); - this->state = GST_GDP_DEPAY_STATE_BUFFER; - } else if (this->payload_type == GST_DP_PAYLOAD_CAPS) { - GST_LOG_OBJECT (this, "switching to state CAPS"); - this->state = GST_GDP_DEPAY_STATE_CAPS; - } else if (this->payload_type >= GST_DP_PAYLOAD_EVENT_NONE) { - GST_LOG_OBJECT (this, "switching to state EVENT"); - this->state = GST_GDP_DEPAY_STATE_EVENT; - } else { - goto wrong_type; - } - break; - } - case GST_GDP_DEPAY_STATE_BUFFER: - { - - /* if we receive a buffer without caps first, we error out */ - if (!this->caps) - goto no_caps; - - GST_LOG_OBJECT (this, "reading GDP buffer from adapter"); - buf = gst_dp_buffer_from_header (GST_DP_HEADER_LENGTH, this->header); - if (!buf) - goto buffer_failed; - - /* now take the payload if there is any */ - if (this->payload_length > 0) { - guint8 *payload; - - payload = gst_adapter_take (this->adapter, this->payload_length); - memcpy (GST_BUFFER_DATA (buf), payload, this->payload_length); - g_free (payload); - } - - /* set caps and push */ - gst_buffer_set_caps (buf, this->caps); - ret = gst_pad_push (this->srcpad, buf); - if (ret != GST_FLOW_OK) - goto push_error; - - GST_LOG_OBJECT (this, "switching to state HEADER"); - this->state = GST_GDP_DEPAY_STATE_HEADER; - break; - } - case GST_GDP_DEPAY_STATE_CAPS: - { - guint8 *payload; - - /* take the payload of the caps */ - GST_LOG_OBJECT (this, "reading GDP caps from adapter"); - payload = gst_adapter_take (this->adapter, this->payload_length); - caps = gst_dp_caps_from_packet (GST_DP_HEADER_LENGTH, this->header, - payload); - g_free (payload); - if (!caps) - goto caps_failed; - - GST_DEBUG_OBJECT (this, "read caps %" GST_PTR_FORMAT, caps); - gst_caps_replace (&(this->caps), caps); - gst_pad_set_caps (this->srcpad, caps); - /* drop the creation ref we still have */ - gst_caps_unref (caps); - - GST_LOG_OBJECT (this, "switching to state HEADER"); - this->state = GST_GDP_DEPAY_STATE_HEADER; - break; - } - case GST_GDP_DEPAY_STATE_EVENT: - { - guint8 *payload; - - GST_LOG_OBJECT (this, "reading GDP event from adapter"); - - /* adapter doesn't like 0 length payload */ - if (this->payload_length > 0) - payload = gst_adapter_take (this->adapter, this->payload_length); - else - payload = NULL; - event = gst_dp_event_from_packet (GST_DP_HEADER_LENGTH, this->header, - payload); - g_free (payload); - if (!event) - goto event_failed; - - GST_DEBUG_OBJECT (this, "sending deserialized event %p of type %s", - event, gst_event_type_get_name (event->type)); - gst_pad_push_event (this->srcpad, event); - - GST_LOG_OBJECT (this, "switching to state HEADER"); - this->state = GST_GDP_DEPAY_STATE_HEADER; - break; - } - } - } - -done: - gst_object_unref (this); - return ret; - - /* ERRORS */ -header_validate_error: - { - GST_ELEMENT_ERROR (this, STREAM, DECODE, (NULL), - ("GDP packet header does not validate")); - ret = GST_FLOW_ERROR; - goto done; - } -wrong_type: - { - GST_ELEMENT_ERROR (this, STREAM, DECODE, (NULL), - ("GDP packet header is of wrong type")); - ret = GST_FLOW_ERROR; - goto done; - } -no_caps: - { - GST_ELEMENT_ERROR (this, STREAM, DECODE, (NULL), - ("Received a buffer without first receiving caps")); - ret = GST_FLOW_NOT_NEGOTIATED; - goto done; - } -buffer_failed: - { - GST_ELEMENT_ERROR (this, STREAM, DECODE, (NULL), - ("could not create buffer from GDP packet")); - ret = GST_FLOW_ERROR; - goto done; - } -push_error: - { - GST_WARNING_OBJECT (this, "pushing depayloaded buffer returned %d", ret); - goto done; - } -caps_failed: - { - GST_ELEMENT_ERROR (this, STREAM, DECODE, (NULL), - ("could not create caps from GDP packet")); - ret = GST_FLOW_ERROR; - goto done; - } -event_failed: - { - GST_ELEMENT_ERROR (this, STREAM, DECODE, (NULL), - ("could not create event from GDP packet")); - ret = GST_FLOW_ERROR; - goto done; - } -} - -static GstStateChangeReturn -gst_gdp_depay_change_state (GstElement * element, GstStateChange transition) -{ - GstStateChangeReturn ret; - GstGDPDepay *this = GST_GDP_DEPAY (element); - - ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); - - switch (transition) { - case GST_STATE_CHANGE_PAUSED_TO_READY: - if (this->caps) { - gst_caps_unref (this->caps); - this->caps = NULL; - } - break; - default: - break; - } - return ret; -} - -gboolean -gst_gdp_depay_plugin_init (GstPlugin * plugin) -{ - if (!gst_element_register (plugin, "gdpdepay", GST_RANK_NONE, - GST_TYPE_GDP_DEPAY)) - return FALSE; - - return TRUE; -} |