claude-noether/libva-v4l2-request-fourier
1
0
Fork 0
forked from marfrit/libva-v4l2-request-fourier
Code Pull Requests Activity

Grab the base index when allocating buffers and mapping them

Browse Source 
Because there might be more than a single call to CreateSurfaces,
we cannot assume that the index relative to the number of surfaces
requested in a single call matches the v4l2 index.

Grab the base index (as returned by the kernel) when allocating
buffers and use it for memory mapping and addressing them in v4l2.
This avoids memory-mapping the first (index 0) buffer multiple times
in that scenario instead of the n-th allocated buffer (in the n-th
call in the sequence).

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
This commit is contained in:
Paul Kocialkowski
2018-07-20 13:48:51 +02:00
parent 3b0e7dbf12
commit c9327dd55a
4 changed files with 20 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/surface.c
+8 -3
View File
@@ -58,6 +58,8 @@ VAStatus RequestCreateSurfaces2(VADriverContextP context, unsigned int format,
unsigned int destination_sizes[VIDEO_MAX_PLANES];
unsigned int destination_bytesperlines[VIDEO_MAX_PLANES];
unsigned int destination_planes_count;
unsigned int index_base;
unsigned int index;
unsigned int i, j;
VASurfaceID id;
bool found;
@@ -93,18 +95,21 @@ VAStatus RequestCreateSurfaces2(VADriverContextP context, unsigned int format,
rc = v4l2_create_buffers(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
surfaces_count);
surfaces_count, &index_base);
if (rc < 0)
return VA_STATUS_ERROR_ALLOCATION_FAILED;
for (i = 0; i < surfaces_count; i++) {
index = index_base + i;
id = object_heap_allocate(&driver_data->surface_heap);
surface_object = SURFACE(driver_data, id);
if (surface_object == NULL)
return VA_STATUS_ERROR_ALLOCATION_FAILED;
rc = v4l2_query_buffer(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, i,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
index,
surface_object->destination_map_lengths,
surface_object->destination_map_offsets,
video_format->v4l2_buffers_count);
@@ -157,7 +162,7 @@ VAStatus RequestCreateSurfaces2(VADriverContextP context, unsigned int format,
surface_object->source_data = NULL;
surface_object->source_size = 0;
surface_object->destination_index = 0;
surface_object->destination_index = index;
surface_object->destination_planes_count =
destination_planes_count;