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fdsink: implement ::render_list() using writev()

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Write out multiple buffers possibly containing multiple
memories with one writev() call, without merging the
buffer memories first, like ::render() does currently.
This commit is contained in:
Tim-Philipp Müller 2014-11-28 14:39:33 +00:00
parent 66bdae5f33
commit dc73245edd
2 changed files with 52 additions and 0 deletions
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51
plugins/elements/gstfdsink.c
View file

@ -58,6 +58,7 @@
#include <string.h>
#include "gstfdsink.h"
#include "gstelements_private.h"
#ifdef G_OS_WIN32
#include <io.h> /* lseek, open, close, read */
@ -107,6 +108,8 @@ static void gst_fd_sink_dispose (GObject * obj);
static gboolean gst_fd_sink_query (GstBaseSink * bsink, GstQuery * query);
static GstFlowReturn gst_fd_sink_render (GstBaseSink * sink,
GstBuffer * buffer);
static GstFlowReturn gst_fd_sink_render_list (GstBaseSink * bsink,
GstBufferList * buffer_list);
static gboolean gst_fd_sink_start (GstBaseSink * basesink);
static gboolean gst_fd_sink_stop (GstBaseSink * basesink);
static gboolean gst_fd_sink_unlock (GstBaseSink * basesink);
@ -138,6 +141,7 @@ gst_fd_sink_class_init (GstFdSinkClass * klass)
gst_static_pad_template_get (&sinktemplate));
gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_fd_sink_render);
gstbasesink_class->render_list = GST_DEBUG_FUNCPTR (gst_fd_sink_render_list);
gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_fd_sink_start);
gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_fd_sink_stop);
gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock);
@ -227,6 +231,53 @@ gst_fd_sink_query (GstBaseSink * bsink, GstQuery * query)
return res;
}
static GstFlowReturn
gst_fd_sink_render_buffers (GstFdSink * sink, GstBuffer ** buffers,
guint num_buffers, guint8 * mem_nums, guint total_mems)
{
return gst_writev_buffers (GST_OBJECT_CAST (sink), sink->fd, sink->fdset,
buffers, num_buffers, mem_nums, total_mems, &sink->bytes_written,
&sink->current_pos);
}
static GstFlowReturn
gst_fd_sink_render_list (GstBaseSink * bsink, GstBufferList * buffer_list)
{
GstFlowReturn flow;
GstBuffer **buffers;
GstFdSink *sink;
guint8 *mem_nums;
guint total_mems;
guint i, num_buffers;
sink = GST_FD_SINK_CAST (bsink);
num_buffers = gst_buffer_list_length (buffer_list);
if (num_buffers == 0)
goto no_data;
/* extract buffers from list and count memories */
buffers = g_newa (GstBuffer *, num_buffers);
mem_nums = g_newa (guint8, num_buffers);
for (i = 0, total_mems = 0; i < num_buffers; ++i) {
buffers[i] = gst_buffer_list_get (buffer_list, i);
mem_nums[i] = gst_buffer_n_memory (buffers[i]);
total_mems += mem_nums[i];
}
flow =
gst_fd_sink_render_buffers (sink, buffers, num_buffers, mem_nums,
total_mems);
return flow;
no_data:
{
GST_LOG_OBJECT (sink, "empty buffer list");
return GST_FLOW_OK;
}
}
static GstFlowReturn
gst_fd_sink_render (GstBaseSink * sink, GstBuffer * buffer)
{

1
plugins/elements/gstfdsink.h
View file

@ -40,6 +40,7 @@ G_BEGIN_DECLS
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FD_SINK))
#define GST_IS_FD_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FD_SINK))
#define GST_FD_SINK_CAST(obj) ((GstFdSink *)(obj))
typedef struct _GstFdSink GstFdSink;
typedef struct _GstFdSinkClass GstFdSinkClass;