static gboolean gst_shm_sink_stop (GstBaseSink * bsink) { GstShmSink *self = GST_SHM_SINK (bsink); self->stop = TRUE; gst_poll_set_flushing (self->poll, TRUE); if (self->allocator) gst_object_unref (self->allocator); self->allocator = NULL; g_thread_join (self->pollthread); self->pollthread = NULL; GST_DEBUG_OBJECT (self, "Stopping"); while (self->clients) { struct GstShmClient *client = self->clients->data; self->clients = g_list_remove (self->clients, client); sp_writer_close_client (self->pipe, client->client, (sp_buffer_free_callback) gst_buffer_unref, NULL); g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0, client->pollfd.fd); g_slice_free (struct GstShmClient, client); } gst_poll_free (self->poll); self->poll = NULL; sp_writer_close (self->pipe, NULL, NULL); self->pipe = NULL; return TRUE; }
static void gst_shm_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstShmSink *self = GST_SHM_SINK (object); GST_OBJECT_LOCK (object); switch (prop_id) { case PROP_SOCKET_PATH: g_value_set_string (value, self->socket_path); break; case PROP_PERMS: g_value_set_uint (value, self->perms); break; case PROP_SHM_SIZE: g_value_set_uint (value, self->size); break; case PROP_WAIT_FOR_CONNECTION: g_value_set_boolean (value, self->wait_for_connection); break; case PROP_BUFFER_TIME: g_value_set_int64 (value, self->buffer_time); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (object); }
static GstFlowReturn gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstShmSink *self = GST_SHM_SINK (bsink); int rv; GstMapInfo map; GST_OBJECT_LOCK (self); while (self->wait_for_connection && !self->clients) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); return GST_FLOW_FLUSHING; } } while (!gst_shm_sink_can_render (self, GST_BUFFER_TIMESTAMP (buf))) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); return GST_FLOW_FLUSHING; } } gst_buffer_map (buf, &map, GST_MAP_READ); rv = sp_writer_send_buf (self->pipe, (char *) map.data, map.size, GST_BUFFER_TIMESTAMP (buf)); gst_buffer_unmap (buf, &map); if (rv == -1) { ShmBlock *block = NULL; gchar *shmbuf = NULL; while ((block = sp_writer_alloc_block (self->pipe, gst_buffer_get_size (buf))) == NULL) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); return GST_FLOW_FLUSHING; } } while (self->wait_for_connection && !self->clients) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { sp_writer_free_block (block); GST_OBJECT_UNLOCK (self); return GST_FLOW_FLUSHING; } } shmbuf = sp_writer_block_get_buf (block); gst_buffer_extract (buf, 0, shmbuf, gst_buffer_get_size (buf)); sp_writer_send_buf (self->pipe, shmbuf, gst_buffer_get_size (buf), GST_BUFFER_TIMESTAMP (buf)); sp_writer_free_block (block); } GST_OBJECT_UNLOCK (self); return GST_FLOW_OK; }
/* * Set the value of a property for the server sink. */ static void gst_shm_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstShmSink *self = GST_SHM_SINK (object); int ret = 0; switch (prop_id) { case PROP_SOCKET_PATH: GST_OBJECT_LOCK (object); g_free (self->socket_path); self->socket_path = g_value_dup_string (value); GST_OBJECT_UNLOCK (object); break; case PROP_PERMS: GST_OBJECT_LOCK (object); self->perms = g_value_get_uint (value); if (self->pipe) ret = sp_writer_setperms_shm (self->pipe, self->perms); GST_OBJECT_UNLOCK (object); if (ret < 0) GST_WARNING_OBJECT (object, "Could not set permissions on pipe: %s", strerror (ret)); break; case PROP_SHM_SIZE: GST_OBJECT_LOCK (object); if (self->pipe) { if (sp_writer_resize (self->pipe, g_value_get_uint (value)) < 0) { /* Swap allocators, so we can know immediately if the memory is * ours */ gst_object_unref (self->allocator); self->allocator = gst_shm_sink_allocator_new (self); GST_DEBUG_OBJECT (self, "Resized shared memory area from %u to " "%u bytes", self->size, g_value_get_uint (value)); } else { GST_WARNING_OBJECT (self, "Could not resize shared memory area from" "%u to %u bytes", self->size, g_value_get_uint (value)); } } self->size = g_value_get_uint (value); GST_OBJECT_UNLOCK (object); break; case PROP_WAIT_FOR_CONNECTION: GST_OBJECT_LOCK (object); self->wait_for_connection = g_value_get_boolean (value); GST_OBJECT_UNLOCK (object); g_cond_broadcast (&self->cond); break; case PROP_BUFFER_TIME: GST_OBJECT_LOCK (object); self->buffer_time = g_value_get_int64 (value); GST_OBJECT_UNLOCK (object); g_cond_broadcast (&self->cond); break; default: break; } }
static gboolean gst_shm_sink_start (GstBaseSink * bsink) { GstShmSink *self = GST_SHM_SINK (bsink); GError *err = NULL; self->stop = FALSE; if (!self->socket_path) { GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE, ("Could not open socket."), (NULL)); return FALSE; } GST_DEBUG_OBJECT (self, "Creating new socket at %s" " with shared memory of %d bytes", self->socket_path, self->size); self->pipe = sp_writer_create (self->socket_path, self->size, self->perms); if (!self->pipe) { GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE, ("Could not open socket."), (NULL)); return FALSE; } sp_set_data (self->pipe, self); g_free (self->socket_path); self->socket_path = g_strdup (sp_writer_get_path (self->pipe)); GST_DEBUG ("Created socket at %s", self->socket_path); self->poll = gst_poll_new (TRUE); gst_poll_fd_init (&self->serverpollfd); self->serverpollfd.fd = sp_get_fd (self->pipe); gst_poll_add_fd (self->poll, &self->serverpollfd); gst_poll_fd_ctl_read (self->poll, &self->serverpollfd, TRUE); self->pollthread = g_thread_try_new ("gst-shmsink-poll-thread", pollthread_func, self, &err); if (!self->pollthread) goto thread_error; self->allocator = gst_shm_sink_allocator_new (self); return TRUE; thread_error: sp_writer_close (self->pipe, NULL, NULL); self->pipe = NULL; gst_poll_free (self->poll); GST_ELEMENT_ERROR (self, CORE, THREAD, ("Could not start thread"), ("%s", err->message)); g_error_free (err); return FALSE; }
static void gst_shm_sink_finalize (GObject * object) { GstShmSink *self = GST_SHM_SINK (object); g_cond_free (self->cond); G_OBJECT_CLASS (parent_class)->finalize (object); }
static GstFlowReturn gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstShmSink *self = GST_SHM_SINK (bsink); int rv; GST_OBJECT_LOCK (self); while (self->wait_for_connection && !self->clients) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); return GST_FLOW_WRONG_STATE; } } rv = sp_writer_send_buf (self->pipe, (char *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); if (rv == -1) { ShmBlock *block = NULL; gchar *shmbuf = NULL; while ((block = sp_writer_alloc_block (self->pipe, GST_BUFFER_SIZE (buf))) == NULL) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); return GST_FLOW_WRONG_STATE; } } while (self->wait_for_connection && !self->clients) { g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { sp_writer_free_block (block); GST_OBJECT_UNLOCK (self); return GST_FLOW_WRONG_STATE; } } shmbuf = sp_writer_block_get_buf (block); memcpy (shmbuf, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); sp_writer_send_buf (self->pipe, shmbuf, GST_BUFFER_SIZE (buf)); sp_writer_free_block (block); } GST_OBJECT_UNLOCK (self); return GST_FLOW_OK; }
/* * Set the value of a property for the server sink. */ static void gst_shm_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstShmSink *self = GST_SHM_SINK (object); int ret = 0; switch (prop_id) { case PROP_SOCKET_PATH: GST_OBJECT_LOCK (object); g_free (self->socket_path); self->socket_path = g_value_dup_string (value); GST_OBJECT_UNLOCK (object); break; case PROP_PERMS: GST_OBJECT_LOCK (object); self->perms = g_value_get_uint (value); if (self->pipe) ret = sp_writer_setperms_shm (self->pipe, self->perms); GST_OBJECT_UNLOCK (object); if (ret < 0) GST_WARNING_OBJECT (object, "Could not set permissions on pipe: %s", strerror (ret)); break; case PROP_SHM_SIZE: GST_OBJECT_LOCK (object); if (self->pipe) { if (sp_writer_resize (self->pipe, g_value_get_uint (value)) < 0) GST_DEBUG_OBJECT (self, "Resized shared memory area from %u to " "%u bytes", self->size, g_value_get_uint (value)); else GST_WARNING_OBJECT (self, "Could not resize shared memory area from" "%u to %u bytes", self->size, g_value_get_uint (value)); } self->size = g_value_get_uint (value); GST_OBJECT_UNLOCK (object); break; case PROP_WAIT_FOR_CONNECTION: GST_OBJECT_LOCK (object); self->wait_for_connection = g_value_get_boolean (value); GST_OBJECT_UNLOCK (object); g_cond_broadcast (self->cond); break; default: break; } }
static GstFlowReturn gst_shm_sink_buffer_alloc (GstBaseSink * sink, guint64 offset, guint size, GstCaps * caps, GstBuffer ** out_buf) { GstShmSink *self = GST_SHM_SINK (sink); GstBuffer *buffer; ShmBlock *block = NULL; gpointer buf = NULL; GST_OBJECT_LOCK (self); block = sp_writer_alloc_block (self->pipe, size); if (block) { buf = sp_writer_block_get_buf (block); g_object_ref (self); } GST_OBJECT_UNLOCK (self); if (block) { buffer = gst_buffer_new (); GST_BUFFER_DATA (buffer) = buf; GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) block; GST_BUFFER_FREE_FUNC (buffer) = GST_DEBUG_FUNCPTR (gst_shm_sink_free_buffer); GST_BUFFER_SIZE (buffer) = size; GST_LOG_OBJECT (self, "Allocated buffer of %u bytes from shared memory at %p", size, buf); } else { buffer = gst_buffer_new_and_alloc (size); GST_LOG_OBJECT (self, "Not enough shared memory for buffer of %u bytes, " "allocating using standard allocator", size); } GST_BUFFER_OFFSET (buffer) = offset; gst_buffer_set_caps (buffer, caps); *out_buf = buffer; return GST_FLOW_OK; }
static void gst_shm_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstShmSink *self = GST_SHM_SINK (object); GST_OBJECT_LOCK (object); switch (prop_id) { case PROP_SOCKET_PATH: g_value_set_string (value, self->socket_path); break; case PROP_PERMS: self->perms = g_value_get_uint (value); if (self->pipe) { int ret; ret = sp_writer_setperms_shm (self->pipe, self->perms); if (ret < 0) GST_WARNING_OBJECT (object, "Could not set permissions on pipe: %s", strerror (ret)); } break; case PROP_SHM_SIZE: g_value_set_uint (value, self->size); break; case PROP_WAIT_FOR_CONNECTION: g_value_set_boolean (value, self->wait_for_connection); break; case PROP_BUFFER_TIME: g_value_set_int64 (value, self->buffer_time); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (object); }
static gpointer pollthread_func (gpointer data) { GstShmSink *self = GST_SHM_SINK (data); GList *item; GstClockTime timeout = GST_CLOCK_TIME_NONE; int rv = 0; while (!self->stop) { do { rv = gst_poll_wait (self->poll, timeout); } while (rv < 0 && errno == EINTR); if (rv < 0) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed waiting on fd activity"), ("gst_poll_wait returned %d, errno: %d", rv, errno)); return NULL; } timeout = GST_CLOCK_TIME_NONE; if (self->stop) return NULL; if (gst_poll_fd_has_closed (self->poll, &self->serverpollfd)) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed read from shmsink"), ("Control socket has closed")); return NULL; } if (gst_poll_fd_has_error (self->poll, &self->serverpollfd)) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"), ("Control socket has error")); return NULL; } if (gst_poll_fd_can_read (self->poll, &self->serverpollfd)) { ShmClient *client; struct GstShmClient *gclient; GST_OBJECT_LOCK (self); client = sp_writer_accept_client (self->pipe); GST_OBJECT_UNLOCK (self); if (!client) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"), ("Control socket returns wrong data")); return NULL; } gclient = g_slice_new (struct GstShmClient); gclient->client = client; gst_poll_fd_init (&gclient->pollfd); gclient->pollfd.fd = sp_writer_get_client_fd (client); gst_poll_add_fd (self->poll, &gclient->pollfd); gst_poll_fd_ctl_read (self->poll, &gclient->pollfd, TRUE); self->clients = g_list_prepend (self->clients, gclient); g_signal_emit (self, signals[SIGNAL_CLIENT_CONNECTED], 0, gclient->pollfd.fd); /* we need to call gst_poll_wait before calling gst_poll_* status functions on that new descriptor, so restart the loop, so _wait will have been called on all elements of self->poll, whether they have just been added or not. */ timeout = 0; continue; } again: for (item = self->clients; item; item = item->next) { struct GstShmClient *gclient = item->data; if (gst_poll_fd_has_closed (self->poll, &gclient->pollfd)) { GST_WARNING_OBJECT (self, "One client is gone, closing"); goto close_client; } if (gst_poll_fd_has_error (self->poll, &gclient->pollfd)) { GST_WARNING_OBJECT (self, "One client fd has error, closing"); goto close_client; } if (gst_poll_fd_can_read (self->poll, &gclient->pollfd)) { int rv; gpointer tag = NULL; GST_OBJECT_LOCK (self); rv = sp_writer_recv (self->pipe, gclient->client, &tag); GST_OBJECT_UNLOCK (self); if (rv < 0) { GST_WARNING_OBJECT (self, "One client has read error," " closing (retval: %d errno: %d)", rv, errno); goto close_client; } g_assert (rv == 0 || tag == NULL); if (rv == 0) gst_buffer_unref (tag); } continue; close_client: { GSList *list = NULL; GST_OBJECT_LOCK (self); sp_writer_close_client (self->pipe, gclient->client, (sp_buffer_free_callback) free_buffer_locked, (void **) &list); GST_OBJECT_UNLOCK (self); g_slist_free_full (list, (GDestroyNotify) gst_buffer_unref); } gst_poll_remove_fd (self->poll, &gclient->pollfd); self->clients = g_list_remove (self->clients, gclient); g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0, gclient->pollfd.fd); g_slice_free (struct GstShmClient, gclient); goto again; } g_cond_broadcast (&self->cond); }
static GstFlowReturn gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstShmSink *self = GST_SHM_SINK (bsink); int rv = 0; GstMapInfo map; gboolean need_new_memory = FALSE; GstFlowReturn ret = GST_FLOW_OK; GstMemory *memory = NULL; GstBuffer *sendbuf = NULL; gsize written_bytes; GST_OBJECT_LOCK (self); while (self->wait_for_connection && !self->clients) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); ret = gst_base_sink_wait_preroll (bsink); if (ret == GST_FLOW_OK) GST_OBJECT_LOCK (self); else return ret; } } while (!gst_shm_sink_can_render (self, GST_BUFFER_TIMESTAMP (buf))) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); ret = gst_base_sink_wait_preroll (bsink); if (ret == GST_FLOW_OK) GST_OBJECT_LOCK (self); else return ret; } } if (gst_buffer_n_memory (buf) > 1) { GST_LOG_OBJECT (self, "Buffer %p has %d GstMemory, we only support a single" " one, need to do a memcpy", buf, gst_buffer_n_memory (buf)); need_new_memory = TRUE; } else { memory = gst_buffer_peek_memory (buf, 0); if (memory->allocator != GST_ALLOCATOR (self->allocator)) { need_new_memory = TRUE; GST_LOG_OBJECT (self, "Memory in buffer %p was not allocated by " "%" GST_PTR_FORMAT ", will memcpy", buf, memory->allocator); } } if (need_new_memory) { if (gst_buffer_get_size (buf) > sp_writer_get_max_buf_size (self->pipe)) { gsize area_size = sp_writer_get_max_buf_size (self->pipe); GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT, (NULL), ("Shared memory area of size %" G_GSIZE_FORMAT " is smaller than" "buffer of size %" G_GSIZE_FORMAT, area_size, gst_buffer_get_size (buf))); goto error; } while ((memory = gst_shm_sink_allocator_alloc_locked (self->allocator, gst_buffer_get_size (buf), &self->params)) == NULL) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); ret = gst_base_sink_wait_preroll (bsink); if (ret == GST_FLOW_OK) GST_OBJECT_LOCK (self); else return ret; } } while (self->wait_for_connection && !self->clients) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { GST_OBJECT_UNLOCK (self); ret = gst_base_sink_wait_preroll (bsink); if (ret == GST_FLOW_OK) { GST_OBJECT_LOCK (self); } else { gst_memory_unref (memory); return ret; } } } if (!gst_memory_map (memory, &map, GST_MAP_WRITE)) { GST_ELEMENT_ERROR (self, STREAM, FAILED, (NULL), ("Failed to map memory")); goto error; } GST_DEBUG_OBJECT (self, "Copying %" G_GSIZE_FORMAT " bytes into map of size %" G_GSIZE_FORMAT " bytes.", gst_buffer_get_size (buf), map.size); written_bytes = gst_buffer_extract (buf, 0, map.data, map.size); GST_DEBUG_OBJECT (self, "Copied %" G_GSIZE_FORMAT " bytes.", written_bytes); gst_memory_unmap (memory, &map); sendbuf = gst_buffer_new (); if (!gst_buffer_copy_into (sendbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1)) { GST_ELEMENT_ERROR (self, STREAM, FAILED, (NULL), ("Failed to copy data into send buffer")); gst_buffer_unref (sendbuf); goto error; } gst_buffer_append_memory (sendbuf, memory); } else { sendbuf = gst_buffer_ref (buf); } if (!gst_buffer_map (sendbuf, &map, GST_MAP_READ)) { GST_ELEMENT_ERROR (self, STREAM, FAILED, (NULL), ("Failed to map data into send buffer")); goto error; } /* Make the memory readonly as of now as we've sent it to the other side * We know it's not mapped for writing anywhere as we just mapped it for * reading */ rv = sp_writer_send_buf (self->pipe, (char *) map.data, map.size, sendbuf); if (rv == -1) { GST_ELEMENT_ERROR (self, STREAM, FAILED, (NULL), ("Failed to send data over SHM")); gst_buffer_unmap (sendbuf, &map); goto error; } gst_buffer_unmap (sendbuf, &map); GST_OBJECT_UNLOCK (self); if (rv == 0) { GST_DEBUG_OBJECT (self, "No clients connected, unreffing buffer"); gst_buffer_unref (sendbuf); } return ret; error: GST_OBJECT_UNLOCK (self); return GST_FLOW_ERROR; }
static gpointer pollthread_func (gpointer data) { GstShmSink *self = GST_SHM_SINK (data); GList *item; while (!self->stop) { if (gst_poll_wait (self->poll, GST_CLOCK_TIME_NONE) < 0) return NULL; if (self->stop) return NULL; if (gst_poll_fd_has_closed (self->poll, &self->serverpollfd)) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed read from shmsink"), ("Control socket has closed")); return NULL; } if (gst_poll_fd_has_error (self->poll, &self->serverpollfd)) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"), ("Control socket has error")); return NULL; } if (gst_poll_fd_can_read (self->poll, &self->serverpollfd)) { ShmClient *client; struct GstShmClient *gclient; GST_OBJECT_LOCK (self); client = sp_writer_accept_client (self->pipe); GST_OBJECT_UNLOCK (self); if (!client) { GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"), ("Control socket returns wrong data")); return NULL; } gclient = g_slice_new (struct GstShmClient); gclient->client = client; gst_poll_fd_init (&gclient->pollfd); gclient->pollfd.fd = sp_writer_get_client_fd (client); gst_poll_add_fd (self->poll, &gclient->pollfd); gst_poll_fd_ctl_read (self->poll, &gclient->pollfd, TRUE); self->clients = g_list_prepend (self->clients, gclient); g_signal_emit (self, signals[SIGNAL_CLIENT_CONNECTED], 0, gclient->pollfd.fd); } again: for (item = self->clients; item; item = item->next) { struct GstShmClient *gclient = item->data; if (gst_poll_fd_has_closed (self->poll, &gclient->pollfd)) { GST_WARNING_OBJECT (self, "One client is gone, closing"); goto close_client; } if (gst_poll_fd_has_error (self->poll, &gclient->pollfd)) { GST_WARNING_OBJECT (self, "One client fd has error, closing"); goto close_client; } if (gst_poll_fd_can_read (self->poll, &gclient->pollfd)) { int rv; GST_OBJECT_LOCK (self); rv = sp_writer_recv (self->pipe, gclient->client); GST_OBJECT_UNLOCK (self); if (rv < 0) { GST_WARNING_OBJECT (self, "One client has read error," " closing (retval: %d errno: %d)", rv, errno); goto close_client; } } continue; close_client: GST_OBJECT_LOCK (self); sp_writer_close_client (self->pipe, gclient->client); GST_OBJECT_UNLOCK (self); gst_poll_remove_fd (self->poll, &gclient->pollfd); self->clients = g_list_remove (self->clients, gclient); g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0, gclient->pollfd.fd); g_slice_free (struct GstShmClient, gclient); goto again; } g_cond_broadcast (self->cond); }
static GstFlowReturn gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstShmSink *self = GST_SHM_SINK (bsink); int rv = 0; GstMapInfo map; gboolean need_new_memory = FALSE; GstFlowReturn ret = GST_FLOW_OK; GstMemory *memory = NULL; GstBuffer *sendbuf = NULL; GST_OBJECT_LOCK (self); while (self->wait_for_connection && !self->clients) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) goto flushing; } while (!gst_shm_sink_can_render (self, GST_BUFFER_TIMESTAMP (buf))) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) goto flushing; } if (gst_buffer_n_memory (buf) > 1) { GST_LOG_OBJECT (self, "Buffer %p has %d GstMemory, we only support a single" " one, need to do a memcpy", buf, gst_buffer_n_memory (buf)); need_new_memory = TRUE; } else { memory = gst_buffer_peek_memory (buf, 0); if (memory->allocator != GST_ALLOCATOR (self->allocator)) { need_new_memory = TRUE; GST_LOG_OBJECT (self, "Memory in buffer %p was not allocated by " "%" GST_PTR_FORMAT ", will memcpy", buf, memory->allocator); } } if (need_new_memory) { if (gst_buffer_get_size (buf) > sp_writer_get_max_buf_size (self->pipe)) { gsize area_size = sp_writer_get_max_buf_size (self->pipe); GST_OBJECT_UNLOCK (self); GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT, ("Shared memory area is too small"), ("Shared memory area of size %" G_GSIZE_FORMAT " is smaller than" "buffer of size %" G_GSIZE_FORMAT, area_size, gst_buffer_get_size (buf))); return GST_FLOW_ERROR; } while ((memory = gst_shm_sink_allocator_alloc_locked (self->allocator, gst_buffer_get_size (buf), &self->params)) == NULL) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) goto flushing; } while (self->wait_for_connection && !self->clients) { g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self)); if (self->unlock) { gst_memory_unref (memory); GST_OBJECT_UNLOCK (self); return GST_FLOW_FLUSHING; } } gst_memory_map (memory, &map, GST_MAP_WRITE); gst_buffer_extract (buf, 0, map.data, map.size); gst_memory_unmap (memory, &map); sendbuf = gst_buffer_new (); gst_buffer_copy_into (sendbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1); gst_buffer_append_memory (sendbuf, memory); } else { sendbuf = gst_buffer_ref (buf); } gst_buffer_map (sendbuf, &map, GST_MAP_READ); /* Make the memory readonly as of now as we've sent it to the other side * We know it's not mapped for writing anywhere as we just mapped it for * reading */ rv = sp_writer_send_buf (self->pipe, (char *) map.data, map.size, sendbuf); gst_buffer_unmap (sendbuf, &map); GST_OBJECT_UNLOCK (self); if (rv == 0) { GST_DEBUG_OBJECT (self, "No clients connected, unreffing buffer"); gst_buffer_unref (sendbuf); } else if (rv == -1) { GST_ELEMENT_ERROR (self, STREAM, FAILED, ("Invalid allocated buffer"), ("The shmpipe library rejects our buffer, this is a bug")); ret = GST_FLOW_ERROR; } /* If we allocated our own memory, then unmap it */ return ret; flushing: GST_OBJECT_UNLOCK (self); return GST_FLOW_FLUSHING; }