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;
}
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;
}
/**
* shm_writer_send_buffer
* @self: the #ShmWriter with which to send the data buffer
* @buffer: the data buffer to send to all connected clients
* @len: the length of the data @buffer
*
* Sends a buffer of data to all connected clients. The data is internally
* copied into the appropriate shm area so the passed buffer doesn't need
* to be saved.
*
* Returns: the number of clients the buffer was successfully sent to or %-1
* on error. This number only signifies that it was sent successfully,
* not that the clients processed it successfully.
*/
int
shm_writer_send_buffer (ShmWriter *self, const gchar *buffer, gsize len)
{
ShmWriterPrivate *priv = self->priv;
ShmBlock *block;
gchar *buf;
int ret;
if (!priv->open)
{
g_debug ("ShmWriter not open");
return SHM_WRITER_FAILURE;
}
/* Allocating, copying, and freeing all this may seem silly,
* but the data needs to be in the correct range in memory
* in order to share it with other processes */
g_mutex_lock (priv->lock);
block = sp_writer_alloc_block (priv->writer, len);
if (block == NULL)
{
g_debug ("ShmWriter: unable to allocate block");
g_mutex_unlock (priv->lock);
return SHM_WRITER_FAILURE;
}
buf = sp_writer_block_get_buf (block);
memcpy (buf, buffer, len);
ret = sp_writer_send_buf (priv->writer, buf, len);
sp_writer_free_block (block);
g_mutex_unlock (priv->lock);
return ret;
}
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 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;
}