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videoencoder: Add negotiate vfunc that is used to negotiate with downstream

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The default implementation negotiates a buffer pool and allocator
with downstream.
This commit is contained in:
Sebastian Dröge 2012-08-09 14:39:18 +02:00
parent 7cb22ef241
commit e37bb460bd
2 changed files with 34 additions and 10 deletions
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40
gst-libs/gst/video/gstvideoencoder.c
View file

@ -231,6 +231,7 @@ static gboolean gst_video_encoder_decide_allocation_default (GstVideoEncoder *
encoder, GstQuery * query);
static gboolean gst_video_encoder_propose_allocation_default (GstVideoEncoder *
encoder, GstQuery * query);
static gboolean gst_video_encoder_negotiate_default (GstVideoEncoder * encoder);
/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
* method to get to the padtemplates */
@ -292,6 +293,7 @@ gst_video_encoder_class_init (GstVideoEncoderClass * klass)
klass->src_event = gst_video_encoder_src_event_default;
klass->propose_allocation = gst_video_encoder_propose_allocation_default;
klass->decide_allocation = gst_video_encoder_decide_allocation_default;
klass->negotiate = gst_video_encoder_negotiate_default;
}
static void
@ -1391,16 +1393,8 @@ close_failed:
}
}
/**
* gst_video_encoder_negotiate:
* @encoder: a #GstVideoEncoder
*
* Negotiate with downstream elements to currently configured #GstVideoCodecState.
*
* Returns: #TRUE if the negotiation succeeded, else #FALSE.
*/
gboolean
gst_video_encoder_negotiate (GstVideoEncoder * encoder)
static gboolean
gst_video_encoder_negotiate_default (GstVideoEncoder * encoder)
{
GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
GstAllocator *allocator;
@ -1481,6 +1475,32 @@ no_decide_allocation:
}
}
/**
* gst_video_encoder_negotiate:
* @encoder: a #GstVideoEncoder
*
* Negotiate with downstream elements to currently configured #GstVideoCodecState.
*
* Returns: #TRUE if the negotiation succeeded, else #FALSE.
*/
gboolean
gst_video_encoder_negotiate (GstVideoEncoder * encoder)
{
GstVideoEncoderClass *klass;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_VIDEO_ENCODER (encoder), FALSE);
klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
if (klass->negotiate)
ret = klass->negotiate (encoder);
GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
return ret;
}
/**
* gst_video_encoder_allocate_output_buffer:
* @encoder: a #GstVideoEncoder

4
gst-libs/gst/video/gstvideoencoder.h
View file

@ -191,6 +191,8 @@ struct _GstVideoEncoder
* Event handler on the source pad. This function should return
* TRUE if the event was handled and should be discarded
* (i.e. not unref'ed).
* @negotiate: Optional.
* Negotiate with downstream and configure buffer pools, etc.
* @decide_allocation: Optional.
* Setup the allocation parameters for allocating output
* buffers. The passed in query contains the result of the
@ -240,6 +242,8 @@ struct _GstVideoEncoderClass
gboolean (*src_event) (GstVideoEncoder *encoder,
GstEvent *event);
gboolean (*negotiate) (GstVideoEncoder *encoder);
gboolean (*decide_allocation) (GstVideoEncoder *encoder, GstQuery *query);
gboolean (*propose_allocation) (GstVideoEncoder * encoder,