diff options
Diffstat (limited to 'gst/gdp/gstgdppay.c')
| -rw-r--r-- | gst/gdp/gstgdppay.c | 864 |
1 files changed, 864 insertions, 0 deletions
diff --git a/gst/gdp/gstgdppay.c b/gst/gdp/gstgdppay.c new file mode 100644 index 00000000..d26c0a3c --- /dev/null +++ b/gst/gdp/gstgdppay.c @@ -0,0 +1,864 @@ +/* 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 "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 \ + GST_DEBUG_CATEGORY_INIT (gst_gdp_pay_debug, "gdppay", 0, \ + "GDP payloader"); +#define gst_gdp_pay_parent_class parent_class +G_DEFINE_TYPE_WITH_CODE (GstGDPPay, gst_gdp_pay, GST_TYPE_ELEMENT, _do_init); + +static void gst_gdp_pay_reset (GstGDPPay * this); + +static GstFlowReturn gst_gdp_pay_chain (GstPad * pad, GstObject * parent, + GstBuffer * buffer); +static gboolean gst_gdp_pay_src_event (GstPad * pad, GstObject * parent, + GstEvent * event); +static gboolean gst_gdp_pay_sink_event (GstPad * pad, GstObject * parent, + 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_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)); + + gst_element_class_set_static_metadata (gstelement_class, + "GDP Payloader", "GDP/Payloader", + "Payloads GStreamer Data Protocol buffers", + "Thomas Vander Stichele <thomas at apestaart dot org>"); + + gst_element_class_add_pad_template (gstelement_class, + gst_static_pad_template_get (&gdp_pay_sink_template)); + gst_element_class_add_pad_template (gstelement_class, + gst_static_pad_template_get (&gdp_pay_src_template)); + + gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_gdp_pay_change_state); +} + +static void +gst_gdp_pay_init (GstGDPPay * gdppay) +{ + 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_get_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, plen; + + 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_wrapped (header, len); + + plen = gst_dp_header_payload_length (header); + payloadbuf = gst_buffer_new_wrapped (payload, plen); + + return gst_buffer_append (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_wrapped (header, len); + + /* we do not want to lose the ref on the incoming buffer */ + gst_buffer_ref (buffer); + + return gst_buffer_append (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, plen; + 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_wrapped (header, len); + + payloadbuf = gst_buffer_new (); + plen = gst_dp_header_payload_length (header); + if (plen && payload != NULL) { + gst_buffer_append_memory (payloadbuf, + gst_memory_new_wrapped (0, payload, plen, 0, plen, payload, g_free)); + } + + return gst_buffer_append (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); + 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; + + 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); + 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 HEADER, because it's a streamheader - otherwise it + is mixed with regular data buffers */ + GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_HEADER); + 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 HEADER as other GDP event buffers */ + GST_DEBUG_OBJECT (this, + "Setting HEADER flag on outgoing buffer %" GST_PTR_FORMAT, outbuffer); + GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_HEADER); + 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); + + /* if these are our first ever buffers, send out new_segment first */ + if (!this->sent_streamheader) { + GstEvent *event; + GstSegment segment; + + gst_segment_init (&segment, GST_FORMAT_BYTES); + event = gst_event_new_segment (&segment); + + 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_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 */ + 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); + 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)); + + gst_gdp_pay_reset_streamheader (this); + + return GST_FLOW_OK; +} + +static GstFlowReturn +gst_gdp_pay_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer) +{ + GstGDPPay *this; +#if 0 + GstCaps *caps; +#endif + GstBuffer *outbuffer; + GstFlowReturn ret; + + this = GST_GDP_PAY (parent); + + /* 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; + GstSegment segment; + + GST_WARNING_OBJECT (this, + "did not receive new-segment before first buffer"); + gst_segment_init (&segment, GST_FORMAT_BYTES); + event = gst_event_new_segment (&segment); + 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_HEADER); + GST_DEBUG_OBJECT (this, "Storing buffer %p as new_segment_buf", + outbuffer); + this->new_segment_buf = outbuffer; + } + } + /* make sure we've received caps before */ + if (!this->caps) + goto no_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 HEADER, 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_HEADER)) { + GST_DEBUG_OBJECT (this, "Setting HEADER flag on outgoing buffer %p", + outbuffer); + GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_HEADER); + } + + 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); + + 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")); + ret = GST_FLOW_NOT_NEGOTIATED; + goto done; + } +#if 0 +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; + } +#endif +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, GstObject * parent, GstEvent * event) +{ + GstBuffer *outbuffer; + GstGDPPay *this = GST_GDP_PAY (parent); + GstFlowReturn flowret; + GstCaps *caps; + 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_SEGMENT: + 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_HEADER); + gst_gdp_pay_reset_streamheader (this); + break; + case GST_EVENT_CAPS:{ + gst_event_parse_caps (event, &caps); + if (this->caps == NULL || !gst_caps_is_equal (this->caps, caps)) { + GST_INFO_OBJECT (pad, "caps changed to %" GST_PTR_FORMAT, caps); + gst_buffer_replace (&outbuffer, NULL); + gst_caps_replace (&this->caps, caps); + outbuffer = gst_gdp_buffer_from_caps (this, caps); + if (outbuffer == NULL) + goto no_buffer_from_caps; + + GST_BUFFER_DURATION (outbuffer) = 0; + GST_BUFFER_FLAG_SET (outbuffer, GST_BUFFER_FLAG_HEADER); + if (this->caps_buf) + gst_buffer_unref (this->caps_buf); + this->caps_buf = outbuffer; + 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_HEADER); + 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); + + 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; + } +no_buffer_from_caps: + { + GST_ELEMENT_ERROR (this, STREAM, ENCODE, (NULL), + ("Could not create GDP buffer from caps %" GST_PTR_FORMAT, caps)); + 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, GstObject * parent, GstEvent * event) +{ + GstGDPPay *this; + gboolean res = TRUE; + + this = GST_GDP_PAY (parent); + + 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; + } + + 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; +} |