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v4l2: add ALLOCATION query to the sink
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parent
21f532ae10
commit
549a4ddc8f
1 changed files with 76 additions and 1 deletions
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@ -53,6 +53,7 @@
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#include <config.h>
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#endif
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#include "gst/video/gstmetavideo.h"
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#include "gstv4l2colorbalance.h"
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#include "gstv4l2tuner.h"
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@ -133,11 +134,12 @@ static void gst_v4l2sink_set_property (GObject * object, guint prop_id,
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static void gst_v4l2sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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/* GstElement methods: */
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static GstStateChangeReturn gst_v4l2sink_change_state (GstElement * element,
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GstStateChange transition);
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static gboolean gst_v4l2sink_sink_query (GstPad * sinkpad, GstQuery * query);
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/* GstBaseSink methods: */
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static GstCaps *gst_v4l2sink_get_caps (GstBaseSink * bsink, GstCaps * filter);
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static gboolean gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
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@ -234,6 +236,10 @@ gst_v4l2sink_class_init (GstV4l2SinkClass * klass)
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static void
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gst_v4l2sink_init (GstV4l2Sink * v4l2sink)
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{
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/* for the ALLOCATION query */
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gst_pad_set_query_function (GST_BASE_SINK (v4l2sink)->sinkpad,
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gst_v4l2sink_sink_query);
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v4l2sink->v4l2object = gst_v4l2_object_new (GST_ELEMENT (v4l2sink),
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V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_DEVICE,
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gst_v4l2_get_output, gst_v4l2_set_output, NULL);
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@ -662,6 +668,75 @@ invalid_format:
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}
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}
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static gboolean
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gst_v4l2sink_sink_query (GstPad * sinkpad, GstQuery * query)
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{
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GstV4l2Sink *v4l2sink = GST_V4L2SINK (GST_PAD_PARENT (sinkpad));
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GstV4l2Object *obj = v4l2sink->v4l2object;
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gboolean res = TRUE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_ALLOCATION:
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{
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GstBufferPool *pool;
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GstStructure *config;
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GstCaps *caps;
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guint size = 0;
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gboolean need_pool;
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gst_query_parse_allocation (query, &caps, &need_pool);
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if (caps == NULL)
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goto no_caps;
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if ((pool = obj->pool))
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gst_object_ref (pool);
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if (pool != NULL) {
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const GstCaps *pcaps;
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/* we had a pool, check caps */
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_get (config, &pcaps, &size, NULL, NULL, NULL,
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NULL);
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GST_DEBUG_OBJECT (v4l2sink,
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"we had a pool with caps %" GST_PTR_FORMAT, pcaps);
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if (!gst_caps_is_equal (caps, pcaps)) {
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gst_object_unref (pool);
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goto different_caps;
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}
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}
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gst_query_set_allocation_params (query, size, 0, 0, 0, 15, pool);
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/* we also support various metadata */
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gst_query_add_allocation_meta (query, GST_META_API_VIDEO);
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gst_query_add_allocation_meta (query, GST_META_API_VIDEO_CROP);
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if (pool)
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gst_object_unref (pool);
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break;
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}
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default:
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res = FALSE;
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break;
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}
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return res;
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/* ERRORS */
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no_caps:
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{
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GST_DEBUG_OBJECT (sinkpad, "no caps specified");
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return FALSE;
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}
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different_caps:
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{
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/* different caps, we can't use this pool */
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GST_DEBUG_OBJECT (v4l2sink, "pool has different caps");
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return FALSE;
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}
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}
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/* called after A/V sync to render frame */
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static GstFlowReturn
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gst_v4l2sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
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