mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-04-09 17:44:14 +00:00
multisocketsink: Map GstMemorys individually when sending
If a buffer is made up of non-contiguous `GstMemory`s `gst_buffer_map` has to copy all the data into a new `GstMemory` which is contiguous. By mapping all the `GstMemory`s individually and then using scatter-gather IO we avoid this situation. This is a preparatory step for adding support to multisocketsink for sending file descriptors, where a GstBuffer may be made up of several `GstMemory`s, some of which are backed by a memfd or file, but I think this patch is valid and useful on its own. Fixes https://bugzilla.gnome.org/show_bug.cgi?id=746150
This commit is contained in:
William Manley
Wim Taymans
parent
274984e83b
commit
b8232a7467
2 changed files with 176 additions and 18 deletions
|
|
@ -600,6 +600,100 @@ gst_multi_socket_sink_handle_client_read (GstMultiSocketSink * sink,
|
|||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* map_memory_output_vector_n:
|
||||
* @buf: The #GstBuffer that should be mapped
|
||||
* @offset: Offset into the buffer that should be mapped
|
||||
* @vectors: (out,array length=num_vectors): an array of #GOutputVector structs to write into
|
||||
* @mapinfo: (out,array length=num_vectors): an array of #GstMapInfo structs to write into
|
||||
* @num_vectors: the number of elements in @vectors to prevent buffer overruns
|
||||
*
|
||||
* Maps a buffer into memory, populating a #GOutputVector to use scatter-gather
|
||||
* I/O to send the data over a socket. The whole buffer won't be mapped into
|
||||
* memory if it consists of more than @num_vectors #GstMemory s.
|
||||
*
|
||||
* Use #unmap_n_memorys after you are
|
||||
* finished with the mappings.
|
||||
*
|
||||
* Returns: The number of GstMemorys mapped
|
||||
*/
|
||||
static int
|
||||
map_n_memory_output_vector (GstBuffer * buf, size_t offset,
|
||||
GOutputVector * vectors, GstMapInfo * mapinfo, int num_vectors)
|
||||
{
|
||||
guint mem_idx, mem_len;
|
||||
gsize mem_skip;
|
||||
size_t maxsize;
|
||||
int i;
|
||||
|
||||
g_return_val_if_fail (num_vectors > 0, 0);
|
||||
memset (vectors, 0, sizeof (GOutputVector) * num_vectors);
|
||||
|
||||
maxsize = gst_buffer_get_size (buf) - offset;
|
||||
if (!gst_buffer_find_memory (buf, offset, maxsize, &mem_idx, &mem_len,
|
||||
&mem_skip))
|
||||
g_error ("Unable to map memory at offset %" G_GSIZE_FORMAT ", buffer "
|
||||
"length is %" G_GSIZE_FORMAT, offset, gst_buffer_get_size (buf));
|
||||
|
||||
for (i = 0; i < mem_len && i < num_vectors; i++) {
|
||||
GstMapInfo map = { 0 };
|
||||
GstMemory *mem = gst_buffer_peek_memory (buf, mem_idx + i);
|
||||
if (!gst_memory_map (mem, &map, GST_MAP_READ))
|
||||
g_error ("Unable to map memory %p. This should never happen.", mem);
|
||||
|
||||
if (i == 0) {
|
||||
vectors[i].buffer = map.data + mem_skip;
|
||||
vectors[i].size = map.size - mem_skip;
|
||||
} else {
|
||||
vectors[i].buffer = map.data;
|
||||
vectors[i].size = map.size;
|
||||
}
|
||||
mapinfo[i] = map;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
/**
|
||||
* map_n_memory_output_vector:
|
||||
* @buf: The #GstBuffer that should be mapped
|
||||
* @offset: Offset into the buffer that should be mapped
|
||||
* @vectors: (out,array length=num_vectors): an array of #GOutputVector structs to write into
|
||||
* @num_vectors: the number of elements in @vectors to prevent buffer overruns
|
||||
*
|
||||
* Returns: The number of GstMemorys mapped
|
||||
*/
|
||||
static void
|
||||
unmap_n_memorys (GstMapInfo * mapinfo, int num_mappings)
|
||||
{
|
||||
int i;
|
||||
g_return_if_fail (num_mappings > 0);
|
||||
|
||||
for (i = 0; i < num_mappings; i++)
|
||||
gst_memory_unmap (mapinfo[i].memory, &mapinfo[i]);
|
||||
}
|
||||
|
||||
static gssize
|
||||
gst_multi_socket_sink_write (GstMultiSocketSink * sink,
|
||||
GSocket * sock, GstBuffer * buffer, gsize bufoffset,
|
||||
GCancellable * cancellable, GError ** err)
|
||||
{
|
||||
GstMapInfo maps[8];
|
||||
GOutputVector vec[8];
|
||||
guint mems_mapped;
|
||||
gssize wrote;
|
||||
|
||||
mems_mapped = map_n_memory_output_vector (buffer, bufoffset, vec, maps, 8);
|
||||
|
||||
wrote =
|
||||
g_socket_send_message (sock, NULL, vec, mems_mapped, NULL, 0, 0,
|
||||
cancellable, err);
|
||||
|
||||
unmap_n_memorys (maps, mems_mapped);
|
||||
|
||||
return wrote;
|
||||
}
|
||||
|
||||
|
||||
/* Handle a write on a client,
|
||||
* which indicates a read request from a client.
|
||||
*
|
||||
|
|
@ -644,8 +738,6 @@ gst_multi_socket_sink_handle_client_write (GstMultiSocketSink * sink,
|
|||
|
||||
more = TRUE;
|
||||
do {
|
||||
gint maxsize;
|
||||
|
||||
if (!mhclient->sending) {
|
||||
/* client is not working on a buffer */
|
||||
if (mhclient->bufpos == -1) {
|
||||
|
|
@ -725,22 +817,12 @@ gst_multi_socket_sink_handle_client_write (GstMultiSocketSink * sink,
|
|||
if (mhclient->sending) {
|
||||
gssize wrote;
|
||||
GstBuffer *head;
|
||||
GstMapInfo map;
|
||||
|
||||
/* pick first buffer from list */
|
||||
head = GST_BUFFER (mhclient->sending->data);
|
||||
|
||||
gst_buffer_map (head, &map, GST_MAP_READ);
|
||||
maxsize = map.size - mhclient->bufoffset;
|
||||
|
||||
/* FIXME: specific */
|
||||
/* try to write the complete buffer */
|
||||
|
||||
wrote =
|
||||
g_socket_send (mhclient->handle.socket,
|
||||
(gchar *) map.data + mhclient->bufoffset, maxsize, sink->cancellable,
|
||||
&err);
|
||||
gst_buffer_unmap (head, &map);
|
||||
wrote = gst_multi_socket_sink_write (sink, mhclient->handle.socket, head,
|
||||
mhclient->bufoffset, sink->cancellable, &err);
|
||||
|
||||
if (wrote < 0) {
|
||||
/* hmm error.. */
|
||||
|
|
@ -755,7 +837,7 @@ gst_multi_socket_sink_handle_client_write (GstMultiSocketSink * sink,
|
|||
goto write_error;
|
||||
}
|
||||
} else {
|
||||
if (wrote < maxsize) {
|
||||
if (wrote < (gst_buffer_get_size (head) - mhclient->bufoffset)) {
|
||||
/* partial write, try again now */
|
||||
GST_LOG_OBJECT (sink,
|
||||
"partial write on %p of %" G_GSSIZE_FORMAT " bytes",
|
||||
|
|
|
|||
|
|
@ -180,12 +180,15 @@ GST_START_TEST (test_add_client)
|
|||
gst_check_setup_events (mysrcpad, sink, caps, GST_FORMAT_BYTES);
|
||||
ASSERT_CAPS_REFCOUNT (caps, "caps", 3);
|
||||
gst_buffer_fill (buffer, 0, "dead", 4);
|
||||
gst_buffer_append_memory (buffer,
|
||||
gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY, (gpointer) " good", 5,
|
||||
0, 5, NULL, NULL));
|
||||
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
|
||||
|
||||
GST_DEBUG ("reading");
|
||||
fail_if (read_handle (srcsocket, data, 4) < 4);
|
||||
fail_unless (strncmp (data, "dead", 4) == 0);
|
||||
wait_bytes_served (sink, 4);
|
||||
fail_if (read_handle (srcsocket, data, 9) < 9);
|
||||
fail_unless (strncmp (data, "dead good", 9) == 0);
|
||||
wait_bytes_served (sink, 9);
|
||||
|
||||
GST_DEBUG ("cleaning up multisocketsink");
|
||||
ASSERT_SET_STATE (sink, GST_STATE_NULL, GST_STATE_CHANGE_SUCCESS);
|
||||
|
|
@ -200,6 +203,78 @@ GST_START_TEST (test_add_client)
|
|||
|
||||
GST_END_TEST;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
GSocket *sinksocket, *srcsocket;
|
||||
GstElement *sink;
|
||||
} TestSinkAndSocket;
|
||||
|
||||
static void
|
||||
setup_sink_with_socket (TestSinkAndSocket * tsas)
|
||||
{
|
||||
GstCaps *caps = NULL;
|
||||
|
||||
tsas->sink = setup_multisocketsink ();
|
||||
fail_unless (setup_handles (&tsas->sinksocket, &tsas->srcsocket));
|
||||
|
||||
ASSERT_SET_STATE (tsas->sink, GST_STATE_PLAYING, GST_STATE_CHANGE_ASYNC);
|
||||
|
||||
/* add the client */
|
||||
g_signal_emit_by_name (tsas->sink, "add", tsas->sinksocket);
|
||||
|
||||
caps = gst_caps_from_string ("application/x-gst-check");
|
||||
gst_check_setup_events (mysrcpad, tsas->sink, caps, GST_FORMAT_BYTES);
|
||||
gst_caps_unref (caps);
|
||||
}
|
||||
|
||||
static void
|
||||
teardown_sink_with_socket (TestSinkAndSocket * tsas)
|
||||
{
|
||||
if (tsas->sink != NULL) {
|
||||
ASSERT_SET_STATE (tsas->sink, GST_STATE_NULL, GST_STATE_CHANGE_SUCCESS);
|
||||
cleanup_multisocketsink (tsas->sink);
|
||||
tsas->sink = 0;
|
||||
}
|
||||
if (tsas->sinksocket != NULL) {
|
||||
g_object_unref (tsas->sinksocket);
|
||||
tsas->sinksocket = 0;
|
||||
}
|
||||
if (tsas->srcsocket != NULL) {
|
||||
g_object_unref (tsas->srcsocket);
|
||||
tsas->srcsocket = 0;
|
||||
}
|
||||
}
|
||||
|
||||
GST_START_TEST (test_sending_buffers_with_9_gstmemorys)
|
||||
{
|
||||
TestSinkAndSocket tsas = { 0 };
|
||||
GstBuffer *buffer;
|
||||
int i;
|
||||
const char *numbers[9] = { "one", "two", "three", "four", "five", "six",
|
||||
"seven", "eight", "nine"
|
||||
};
|
||||
const char numbers_concat[] = "onetwothreefourfivesixseveneightnine";
|
||||
gchar data[sizeof (numbers_concat)];
|
||||
int len = sizeof (numbers_concat) - 1;
|
||||
|
||||
setup_sink_with_socket (&tsas);
|
||||
|
||||
buffer = gst_buffer_new ();
|
||||
for (i = 0; i < sizeof (numbers) / sizeof (*numbers); i++)
|
||||
gst_buffer_append_memory (buffer,
|
||||
gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY, (gpointer) numbers[i],
|
||||
strlen (numbers[i]), 0, strlen (numbers[i]), NULL, NULL));
|
||||
fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
|
||||
|
||||
GST_DEBUG ("reading");
|
||||
fail_if (read_handle (tsas.srcsocket, data, len) < len);
|
||||
fail_unless (strncmp (data, numbers_concat, len) == 0);
|
||||
|
||||
teardown_sink_with_socket (&tsas);
|
||||
}
|
||||
|
||||
GST_END_TEST;
|
||||
|
||||
/* from the given two data buffers, create two streamheader buffers and
|
||||
* some caps that match it, and store them in the given pointers
|
||||
* returns one ref to each of the buffers and the caps */
|
||||
|
|
@ -874,6 +949,7 @@ multisocketsink_suite (void)
|
|||
suite_add_tcase (s, tc_chain);
|
||||
tcase_add_test (tc_chain, test_no_clients);
|
||||
tcase_add_test (tc_chain, test_add_client);
|
||||
tcase_add_test (tc_chain, test_sending_buffers_with_9_gstmemorys);
|
||||
tcase_add_test (tc_chain, test_streamheader);
|
||||
tcase_add_test (tc_chain, test_change_streamheader);
|
||||
tcase_add_test (tc_chain, test_burst_client_bytes);
|
||||
|
|
|
|||
Loading…
Reference in a new issue