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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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83883a5c18
We are only using read(), write(), memcpy(), strlen() and errno in ipcpipelinecomm.c. Everything else is glib/gstreamer.
131 lines
4.4 KiB
C
131 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) 2015-2017 YouView TV Ltd
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* Author: Vincent Penquerch <vincent.penquerch@collabora.co.uk>
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*
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* gstipcpipelinecomm.h:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_IPC_PIPELINE_COMM_H__
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#define __GST_IPC_PIPELINE_COMM_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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G_BEGIN_DECLS
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#define GST_FLOW_COMM_ERROR GST_FLOW_CUSTOM_ERROR_1
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extern GQuark QUARK_ID;
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typedef enum {
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GST_IPC_PIPELINE_COMM_STATE_TYPE = 0,
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/* for the rest of the states we use directly the data type enums below */
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} GstIpcPipelineCommState;
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typedef enum {
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/* reply types */
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GST_IPC_PIPELINE_COMM_DATA_TYPE_ACK = 1,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_QUERY_RESULT,
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/* data send types */
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GST_IPC_PIPELINE_COMM_DATA_TYPE_BUFFER,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_EVENT,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_SINK_MESSAGE_EVENT,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_QUERY,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_STATE_CHANGE,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_STATE_LOST,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_MESSAGE,
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GST_IPC_PIPELINE_COMM_DATA_TYPE_GERROR_MESSAGE,
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} GstIpcPipelineCommDataType;
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typedef struct
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{
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GstElement *element;
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GMutex mutex;
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int fdin;
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int fdout;
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GHashTable *waiting_ids;
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GThread *reader_thread;
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GstPoll *poll;
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GstPollFD pollFDin;
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GstAdapter *adapter;
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guint8 state;
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guint32 send_id;
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guint32 payload_length;
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guint32 id;
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guint read_chunk_size;
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GstClockTime ack_time;
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void (*on_buffer) (guint32, GstBuffer *, gpointer);
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void (*on_event) (guint32, GstEvent *, gboolean, gpointer);
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void (*on_query) (guint32, GstQuery *, gboolean, gpointer);
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void (*on_state_change) (guint32, GstStateChange, gpointer);
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void (*on_state_lost) (gpointer);
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void (*on_message) (guint32, GstMessage *, gpointer);
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gpointer user_data;
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} GstIpcPipelineComm;
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void gst_ipc_pipeline_comm_plugin_init (void);
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void gst_ipc_pipeline_comm_init (GstIpcPipelineComm *comm, GstElement *e);
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void gst_ipc_pipeline_comm_clear (GstIpcPipelineComm *comm);
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void gst_ipc_pipeline_comm_cancel (GstIpcPipelineComm * comm,
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gboolean flushing);
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void gst_ipc_pipeline_comm_write_flow_ack_to_fd (GstIpcPipelineComm * comm,
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guint32 id, GstFlowReturn ret);
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void gst_ipc_pipeline_comm_write_boolean_ack_to_fd (GstIpcPipelineComm * comm,
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guint32 id, gboolean ret);
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void gst_ipc_pipeline_comm_write_state_change_ack_to_fd (
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GstIpcPipelineComm * comm, guint32 id, GstStateChangeReturn ret);
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void gst_ipc_pipeline_comm_write_query_result_to_fd (GstIpcPipelineComm * comm,
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guint32 id, gboolean result, GstQuery *query);
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GstFlowReturn gst_ipc_pipeline_comm_write_buffer_to_fd (
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GstIpcPipelineComm * comm, GstBuffer * buffer);
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gboolean gst_ipc_pipeline_comm_write_event_to_fd (GstIpcPipelineComm * comm,
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gboolean upstream, GstEvent * event);
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gboolean gst_ipc_pipeline_comm_write_query_to_fd (GstIpcPipelineComm * comm,
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gboolean upstream, GstQuery * query);
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GstStateChangeReturn gst_ipc_pipeline_comm_write_state_change_to_fd (
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GstIpcPipelineComm * comm, GstStateChange transition);
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void gst_ipc_pipeline_comm_write_state_lost_to_fd (GstIpcPipelineComm * comm);
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gboolean gst_ipc_pipeline_comm_write_message_to_fd (GstIpcPipelineComm * comm,
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GstMessage *message);
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gboolean gst_ipc_pipeline_comm_start_reader_thread (GstIpcPipelineComm * comm,
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void (*on_buffer) (guint32, GstBuffer *, gpointer),
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void (*on_event) (guint32, GstEvent *, gboolean, gpointer),
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void (*on_query) (guint32, GstQuery *, gboolean, gpointer),
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void (*on_state_change) (guint32, GstStateChange, gpointer),
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void (*on_state_lost) (gpointer),
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void (*on_message) (guint32, GstMessage *, gpointer),
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gpointer user_data);
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void gst_ipc_pipeline_comm_stop_reader_thread (GstIpcPipelineComm * comm);
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G_END_DECLS
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#endif
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