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/*
* vim: set sts=2 sw=2 et :
*
* License: LGPL-2.1+
* Copyright (c) 2014 Nirbheek Chauhan <nirbheek@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "lib.h"
static void stp_disconnect_cleanup_client (TranscodeClientCtx *ctx);
static gboolean
invoke_g_hash_table_remove (TranscodeServerCtx *ctx)
{
g_hash_table_remove (ctx->parent_ctx_table, ctx->path);
return FALSE;
}
gboolean
stp_on_gst_bus_message (GstBus *bus,
GstMessage *msg,
TranscodeServerCtx *ctx)
{
GError *error = NULL;
char *tmp = NULL;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ERROR:
gst_message_parse_error (msg, &error, &tmp);
g_critical ("ERROR from element %s: %s",
GST_OBJECT_NAME (msg->src), error->message);
g_critical ("Debug info: %s", tmp);
g_error_free (error);
g_free (tmp);
/* Setting the server response will only work if the request
* hasn't already finished, so we check that */
if (!ctx->stream_finished)
soup_message_set_status (ctx->msg, SOUP_STATUS_INTERNAL_SERVER_ERROR);
/* Cleanup in the default main context,
* because GHashTable is not thread-safe */
g_main_context_invoke_full (NULL, G_PRIORITY_HIGH,
(GSourceFunc)invoke_g_hash_table_remove,
ctx, NULL);
break;
case GST_MESSAGE_EOS:
g_debug ("End of file");
/* Cleanup in the default main context,
* because GHashTable is not thread-safe */
g_main_context_invoke_full (NULL, G_PRIORITY_HIGH,
(GSourceFunc)invoke_g_hash_table_remove,
ctx, NULL);
break;
default:
//stp_print_status ("%s\n", gst_message_type_get_name (msg->type));
break;
}
return TRUE;
}
/* When the incoming stream reaches EOS, we call this
* which initiates a shutdown for all clients and then
* the server itself */
void
stp_cleanup_transcode_server_ctx (TranscodeServerCtx *ctx)
{
g_debug (">>> Doing server cleanup");
/* Disconnect and free the context for each client */
g_list_foreach (ctx->clients, (GFunc)stp_disconnect_cleanup_client, NULL);
g_list_free (ctx->clients);
/* Cleanup gstreamer pipeline */
gst_element_set_state (ctx->pipeline, GST_STATE_NULL);
gst_object_unref (ctx->pipeline);
g_free (ctx);
}
static GstPadProbeReturn
pad_blocked_cleanup_cb (GstPad *srcpad,
GstPadProbeInfo *info,
TranscodeClientCtx *ctx)
{
GstElement *tee;
GstElement *sinkbin = GST_ELEMENT (gst_element_get_parent (ctx->appsink));
stp_print_status (".");
/* Remove the probe */
gst_pad_remove_probe (srcpad, GST_PAD_PROBE_INFO_ID (info));
tee = gst_pad_get_parent_element (srcpad);
gst_pad_unlink (srcpad, ctx->ghostsinkpad);
gst_element_release_request_pad (tee, srcpad);
gst_object_unref (srcpad);
gst_object_unref (tee);
gst_element_set_state (sinkbin, GST_STATE_NULL);
gst_bin_remove (GST_BIN (ctx->server_ctx->pipeline), sinkbin);
gst_object_unref (sinkbin);
stp_print_status (" Client cleanup done!\n");
return GST_PAD_PROBE_OK;
}
/* When a client leaves or is kicked, we set the response status
* and then call cleanup here. This involves removing the appsink
* branch for the client from the pipeline, and then freeing the
* context. */
void
stp_cleanup_transcode_client_ctx (TranscodeClientCtx *ctx)
{
GstPad *srcpad;
TranscodeServerCtx *server_ctx = ctx->server_ctx;
GstElement *sinkbin = GST_ELEMENT (gst_element_get_parent (ctx->appsink));
stp_print_status (">>> Doing client cleanup.");
g_source_remove (ctx->timeout_handler_id);
server_ctx->clients = g_list_remove (server_ctx->clients, ctx);
/* Block sinkpad and srcpad, then unlink and remove */
srcpad = gst_pad_get_peer (ctx->ghostsinkpad);
gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_BLOCK,
(GstPadProbeCallback) pad_blocked_cleanup_cb,
ctx, (GDestroyNotify)g_free);
gst_object_unref (sinkbin);
stp_print_status (".");
}
/* When shutting down a client due to a server shutdown,
* we just need to remove the client timeout handler and
* free the context. The rest is owned by the pipeline. */
static void
stp_disconnect_cleanup_client (TranscodeClientCtx *ctx)
{
stp_print_status (">>> Disconnecting client on server shutdown\n");
/* FIXME: This isn't actually setting the status for client
* connections, and clients are just left hanging */
soup_message_set_status (ctx->msg, SOUP_STATUS_GONE);
soup_message_body_complete (ctx->msg->response_body);
g_source_remove (ctx->timeout_handler_id);
/* Don't call the "finished" handler and do a double-free */
g_signal_handler_disconnect (ctx->msg, ctx->finished_handler_id);
g_free (ctx);
}
/* Returns a copy of the streamheader GstBuffer */
GstBuffer*
stp_get_streamheader_from_caps (GstCaps *caps)
{
GstStructure *s;
const GValue *array, *value;
s = gst_caps_get_structure (caps, 0);
array = gst_structure_get_value (s, "streamheader");
g_return_val_if_fail (GST_VALUE_HOLDS_ARRAY (array), NULL);
value = gst_value_array_get_value (array, 0);
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_BUFFER, NULL);
return gst_buffer_copy (g_value_peek_pointer (value));
}
/* Returns a GstBuffer which has consumed the passed-in data */
GstBuffer*
stp_get_gst_buffer (SoupBuffer *chunk)
{
gsize len;
const guint8 *d;
SoupBuffer *copy;
GstBuffer *buffer;
GstMemory *memory;
copy = soup_buffer_copy (chunk);
soup_buffer_get_data (copy, &d, &len);
buffer = gst_buffer_new ();
memory = gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY,
(guint8*)d, len, 0, len, copy,
(GDestroyNotify)soup_buffer_free);
gst_buffer_append_memory (buffer, memory);
return buffer;
}
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