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v4l2: Merge min_buffers_for* variable into one

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Reuse the same min_buffers variable for both capture and output, this
reduce the length of lines and make the code more readable.

https://bugzilla.gnome.org/show_bug.cgi?id=736072
This commit is contained in:
Nicolas Dufresne 2014-09-04 15:11:40 -04:00
parent 3afec4dd01
commit 743c6a4475
4 changed files with 12 additions and 16 deletions
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5
sys/v4l2/gstv4l2bufferpool.c
View file

@ -623,10 +623,7 @@ gst_v4l2_buffer_pool_start (GstBufferPool * bpool)
&max_buffers))
goto wrong_config;
if (V4L2_TYPE_IS_OUTPUT (obj->type))
min_latency = MAX (GST_V4L2_MIN_BUFFERS, obj->min_buffers_for_output);
else
min_latency = MAX (GST_V4L2_MIN_BUFFERS, obj->min_buffers_for_capture);
min_latency = MAX (GST_V4L2_MIN_BUFFERS, obj->min_buffers);
switch (obj->mode) {
case GST_V4L2_IO_RW:

16
sys/v4l2/gstv4l2object.c
View file

@ -3206,13 +3206,13 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
if (v4l2_ioctl (obj->video_fd, VIDIOC_G_CTRL, &ctl) >= 0) {
GST_DEBUG_OBJECT (obj->element, "driver require a minimum of %d buffers",
ctl.value);
obj->min_buffers_for_capture = ctl.value;
obj->min_buffers = ctl.value;
} else {
obj->min_buffers_for_capture = 0;
obj->min_buffers = 0;
}
/* We can't share our own pool, if it exceed V4L2 capacity */
if (min + obj->min_buffers_for_capture + 1 > VIDEO_MAX_FRAME)
if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
can_share_own_pool = FALSE;
/* select a pool */
@ -3289,11 +3289,11 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
* to fill the pipeline, the minimum required to decoder according to the
* driver and 1 more, so we don't endup up with everything downstream or
* held by the decoder. */
own_min = min + obj->min_buffers_for_capture + 1;
own_min = min + obj->min_buffers + 1;
} else {
/* In this case we'll have to configure two buffer pool. For our buffer
* pool, we'll need what the driver one, and one more, so we can dequeu */
own_min = obj->min_buffers_for_capture + 1;
own_min = obj->min_buffers + 1;
own_min = MAX (own_min, GST_V4L2_MIN_BUFFERS);
/* for the downstream pool, we keep what downstream wants, though ensure
@ -3472,12 +3472,12 @@ gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
if (v4l2_ioctl (obj->video_fd, VIDIOC_G_CTRL, &ctl) >= 0) {
GST_DEBUG_OBJECT (obj->element, "driver require a miminum of %d buffers",
ctl.value);
obj->min_buffers_for_output = ctl.value;
obj->min_buffers = ctl.value;
} else {
obj->min_buffers_for_output = 0;
obj->min_buffers = 0;
}
min = MAX (obj->min_buffers_for_output, GST_V4L2_MIN_BUFFERS);
min = MAX (obj->min_buffers, GST_V4L2_MIN_BUFFERS);
gst_query_add_allocation_pool (query, pool, size, min, max);

4
sys/v4l2/gstv4l2object.h
View file

@ -118,8 +118,8 @@ struct _GstV4l2Object {
gboolean prefered_non_contiguous;
/* This will be set if supported in decide_allocation. It can be used to
* calculate the minimum latency of a m2m decoder. */
guint32 min_buffers_for_capture;
* calculate the minimum latency. */
guint32 min_buffers;
/* This will be set if supported in propose allocation. */
guint32 min_buffers_for_output;

3
sys/v4l2/gstv4l2videodec.c
View file

@ -615,8 +615,7 @@ gst_v4l2_video_dec_decide_allocation (GstVideoDecoder * decoder,
ret = GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
query);
latency = self->v4l2capture->min_buffers_for_capture *
self->v4l2capture->duration;
latency = self->v4l2capture->min_buffers * self->v4l2capture->duration;
gst_video_decoder_set_latency (decoder, latency, latency);
return ret;