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hwcontext_opencl: DRM to OpenCL mapping for ARM 

Using cl_arm_import_memory.  Unfortunately, despite this not being a
standard extension, the function clImportMemoryARM() is not accessible
via clGetExtensionFunctionAddressForPlatform().  This means that it has
to be linked directly to the ARM OpenCL binary, so making a portable
binary is not possible as it is with all other mapping extensions.
tags/n4.0
Mark Thompson 7 years ago
parent
f06754e4f3
commit
7faae6e745
2 changed files with 269 additions and 0 deletions
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  1. +6
    -0
      configure
  2. +263
    -0
      libavutil/hwcontext_opencl.c

+ 6
- 0
configure View File

@@ -2121,6 +2121,7 @@ HAVE_LIST="
makeinfo
makeinfo_html
opencl_d3d11
opencl_drm_arm
opencl_dxva2
opencl_vaapi_beignet
opencl_vaapi_intel_media
@@ -6178,6 +6179,11 @@ if enabled_all opencl d3d11va ; then
enable opencl_d3d11
fi

if enabled_all opencl libdrm ; then
check_func_headers "CL/cl_ext.h" clImportMemoryARM &&
enable opencl_drm_arm
fi

enabled vdpau &&
check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
disable vdpau


+ 263
- 0
libavutil/hwcontext_opencl.c View File

@@ -56,6 +56,12 @@
#include "hwcontext_d3d11va.h"
#endif

#if HAVE_OPENCL_DRM_ARM
#include <CL/cl_ext.h>
#include <drm_fourcc.h>
#include "hwcontext_drm.h"
#endif


typedef struct OpenCLDeviceContext {
// Default command queue to use for transfer/mapping operations on
@@ -104,6 +110,10 @@ typedef struct OpenCLDeviceContext {
clEnqueueReleaseD3D11ObjectsKHR_fn
clEnqueueReleaseD3D11ObjectsKHR;
#endif

#if HAVE_OPENCL_DRM_ARM
int drm_arm_mapping_usable;
#endif
} OpenCLDeviceContext;

typedef struct OpenCLFramesContext {
@@ -826,6 +836,37 @@ static int opencl_device_init(AVHWDeviceContext *hwdev)
}
#endif

#if HAVE_OPENCL_DRM_ARM
{
const char *drm_arm_ext = "cl_arm_import_memory";
const char *image_ext = "cl_khr_image2d_from_buffer";
int fail = 0;

if (!opencl_check_extension(hwdev, drm_arm_ext)) {
av_log(hwdev, AV_LOG_VERBOSE, "The %s extension is "
"required for DRM to OpenCL mapping on ARM.\n",
drm_arm_ext);
fail = 1;
}
if (!opencl_check_extension(hwdev, image_ext)) {
av_log(hwdev, AV_LOG_VERBOSE, "The %s extension is "
"required for DRM to OpenCL mapping on ARM.\n",
image_ext);
fail = 1;
}

// clImportMemoryARM() is linked statically.

if (fail) {
av_log(hwdev, AV_LOG_WARNING, "DRM to OpenCL mapping on ARM "
"not usable.\n");
priv->drm_arm_mapping_usable = 0;
} else {
priv->drm_arm_mapping_usable = 1;
}
}
#endif

#undef CL_FUNC

return 0;
@@ -1104,6 +1145,40 @@ static int opencl_filter_gpu_device(AVHWDeviceContext *hwdev,
}
#endif

#if HAVE_OPENCL_DRM_ARM
static int opencl_filter_drm_arm_platform(AVHWDeviceContext *hwdev,
cl_platform_id platform_id,
const char *platform_name,
void *context)
{
const char *drm_arm_ext = "cl_arm_import_memory";

if (opencl_check_platform_extension(platform_id, drm_arm_ext)) {
return 0;
} else {
av_log(hwdev, AV_LOG_DEBUG, "Platform %s does not support the "
"%s extension.\n", platform_name, drm_arm_ext);
return 1;
}
}

static int opencl_filter_drm_arm_device(AVHWDeviceContext *hwdev,
cl_device_id device_id,
const char *device_name,
void *context)
{
const char *drm_arm_ext = "cl_arm_import_memory";

if (opencl_check_device_extension(device_id, drm_arm_ext)) {
return 0;
} else {
av_log(hwdev, AV_LOG_DEBUG, "Device %s does not support the "
"%s extension.\n", device_name, drm_arm_ext);
return 1;
}
}
#endif

static int opencl_device_derive(AVHWDeviceContext *hwdev,
AVHWDeviceContext *src_ctx,
int flags)
@@ -1250,6 +1325,24 @@ static int opencl_device_derive(AVHWDeviceContext *hwdev,
break;
#endif

#if HAVE_OPENCL_DRM_ARM
case AV_HWDEVICE_TYPE_DRM:
{
OpenCLDeviceSelector selector = {
.platform_index = -1,
.device_index = -1,
.context = NULL,
.enumerate_platforms = &opencl_enumerate_platforms,
.filter_platform = &opencl_filter_drm_arm_platform,
.enumerate_devices = &opencl_enumerate_devices,
.filter_device = &opencl_filter_drm_arm_device,
};

err = opencl_device_create_internal(hwdev, &selector, NULL);
}
break;
#endif

default:
err = AVERROR(ENOSYS);
break;
@@ -2558,6 +2651,165 @@ fail:

#endif

#if HAVE_OPENCL_DRM_ARM

typedef struct DRMARMtoOpenCLMapping {
int nb_objects;
cl_mem object_buffers[AV_DRM_MAX_PLANES];
int nb_planes;
cl_mem plane_images[AV_DRM_MAX_PLANES];
} DRMARMtoOpenCLMapping;

static void opencl_unmap_from_drm_arm(AVHWFramesContext *dst_fc,
HWMapDescriptor *hwmap)
{
DRMARMtoOpenCLMapping *mapping = hwmap->priv;
int i;

for (i = 0; i < mapping->nb_planes; i++)
clReleaseMemObject(mapping->plane_images[i]);

for (i = 0; i < mapping->nb_objects; i++)
clReleaseMemObject(mapping->object_buffers[i]);

av_free(mapping);
}

static int opencl_map_from_drm_arm(AVHWFramesContext *dst_fc, AVFrame *dst,
const AVFrame *src, int flags)
{
AVHWFramesContext *src_fc =
(AVHWFramesContext*)src->hw_frames_ctx->data;
AVOpenCLDeviceContext *dst_dev = dst_fc->device_ctx->hwctx;
const AVDRMFrameDescriptor *desc;
DRMARMtoOpenCLMapping *mapping = NULL;
cl_mem_flags cl_flags;
const cl_import_properties_arm props[3] = {
CL_IMPORT_TYPE_ARM, CL_IMPORT_TYPE_DMA_BUF_ARM, 0,
};
cl_int cle;
int err, i, j;

desc = (const AVDRMFrameDescriptor*)src->data[0];

cl_flags = opencl_mem_flags_for_mapping(flags);
if (!cl_flags)
return AVERROR(EINVAL);

mapping = av_mallocz(sizeof(*mapping));
if (!mapping)
return AVERROR(ENOMEM);

mapping->nb_objects = desc->nb_objects;
for (i = 0; i < desc->nb_objects; i++) {
int fd = desc->objects[i].fd;

av_log(dst_fc, AV_LOG_DEBUG, "Map DRM PRIME fd %d to OpenCL.\n", fd);

if (desc->objects[i].format_modifier) {
av_log(dst_fc, AV_LOG_DEBUG, "Warning: object %d fd %d has "
"nonzero format modifier %"PRId64", result may not "
"be as expected.\n", i, fd,
desc->objects[i].format_modifier);
}

mapping->object_buffers[i] =
clImportMemoryARM(dst_dev->context, cl_flags, props,
&fd, desc->objects[i].size, &cle);
if (!mapping->object_buffers[i]) {
av_log(dst_fc, AV_LOG_ERROR, "Failed to create CL buffer "
"from object %d (fd %d, size %zu) of DRM frame: %d.\n",
i, fd, desc->objects[i].size, cle);
err = AVERROR(EIO);
goto fail;
}
}

mapping->nb_planes = 0;
for (i = 0; i < desc->nb_layers; i++) {
const AVDRMLayerDescriptor *layer = &desc->layers[i];

for (j = 0; j < layer->nb_planes; j++) {
const AVDRMPlaneDescriptor *plane = &layer->planes[j];
cl_mem plane_buffer;
cl_image_format image_format;
cl_image_desc image_desc;
cl_buffer_region region;
int p = mapping->nb_planes;

err = opencl_get_plane_format(src_fc->sw_format, p,
src_fc->width, src_fc->height,
&image_format, &image_desc);
if (err < 0) {
av_log(dst_fc, AV_LOG_ERROR, "Invalid plane %d (DRM "
"layer %d plane %d): %d.\n", p, i, j, err);
goto fail;
}

region.origin = plane->offset;
region.size = image_desc.image_row_pitch *
image_desc.image_height;

plane_buffer =
clCreateSubBuffer(mapping->object_buffers[plane->object_index],
cl_flags,
CL_BUFFER_CREATE_TYPE_REGION,
&region, &cle);
if (!plane_buffer) {
av_log(dst_fc, AV_LOG_ERROR, "Failed to create sub-buffer "
"for plane %d: %d.\n", p, cle);
err = AVERROR(EIO);
goto fail;
}

image_desc.buffer = plane_buffer;

mapping->plane_images[p] =
clCreateImage(dst_dev->context, cl_flags,
&image_format, &image_desc, NULL, &cle);

// Unreference the sub-buffer immediately - we don't need it
// directly and a reference is held by the image.
clReleaseMemObject(plane_buffer);

if (!mapping->plane_images[p]) {
av_log(dst_fc, AV_LOG_ERROR, "Failed to create image "
"for plane %d: %d.\n", p, cle);
err = AVERROR(EIO);
goto fail;
}

++mapping->nb_planes;
}
}

for (i = 0; i < mapping->nb_planes; i++)
dst->data[i] = (uint8_t*)mapping->plane_images[i];

err = ff_hwframe_map_create(dst->hw_frames_ctx, dst, src,
&opencl_unmap_from_drm_arm, mapping);
if (err < 0)
goto fail;

dst->width = src->width;
dst->height = src->height;

return 0;

fail:
for (i = 0; i < mapping->nb_planes; i++) {
clReleaseMemObject(mapping->plane_images[i]);
}
for (i = 0; i < mapping->nb_objects; i++) {
if (mapping->object_buffers[i])
clReleaseMemObject(mapping->object_buffers[i]);
}
av_free(mapping);
return err;
}

#endif

static int opencl_map_from(AVHWFramesContext *hwfc, AVFrame *dst,
const AVFrame *src, int flags)
{
@@ -2593,6 +2845,11 @@ static int opencl_map_to(AVHWFramesContext *hwfc, AVFrame *dst,
case AV_PIX_FMT_D3D11:
if (priv->d3d11_mapping_usable)
return opencl_map_from_d3d11(hwfc, dst, src, flags);
#endif
#if HAVE_OPENCL_DRM_ARM
case AV_PIX_FMT_DRM_PRIME:
if (priv->drm_arm_mapping_usable)
return opencl_map_from_drm_arm(hwfc, dst, src, flags);
#endif
}
return AVERROR(ENOSYS);
@@ -2639,6 +2896,12 @@ static int opencl_frames_derive_to(AVHWFramesContext *dst_fc,
return err;
}
break;
#endif
#if HAVE_OPENCL_DRM_ARM
case AV_HWDEVICE_TYPE_DRM:
if (!priv->drm_arm_mapping_usable)
return AVERROR(ENOSYS);
break;
#endif
default:
return AVERROR(ENOSYS);


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