This source file includes following definitions.
- overlay_opencl_load
- overlay_opencl_blend
- overlay_opencl_config_output
- overlay_opencl_init
- overlay_opencl_activate
- overlay_opencl_uninit
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "framesync.h"
#include "internal.h"
#include "opencl.h"
#include "opencl_source.h"
#include "video.h"
typedef struct OverlayOpenCLContext {
OpenCLFilterContext ocf;
int initialised;
cl_kernel kernel;
cl_command_queue command_queue;
FFFrameSync fs;
int nb_planes;
int x_subsample;
int y_subsample;
int alpha_separate;
int x_position;
int y_position;
} OverlayOpenCLContext;
static int overlay_opencl_load(AVFilterContext *avctx,
enum AVPixelFormat main_format,
enum AVPixelFormat overlay_format)
{
OverlayOpenCLContext *ctx = avctx->priv;
cl_int cle;
const char *source = ff_opencl_source_overlay;
const char *kernel;
const AVPixFmtDescriptor *main_desc, *overlay_desc;
int err, i, main_planes, overlay_planes;
main_desc = av_pix_fmt_desc_get(main_format);
overlay_desc = av_pix_fmt_desc_get(overlay_format);
main_planes = overlay_planes = 0;
for (i = 0; i < main_desc->nb_components; i++)
main_planes = FFMAX(main_planes,
main_desc->comp[i].plane + 1);
for (i = 0; i < overlay_desc->nb_components; i++)
overlay_planes = FFMAX(overlay_planes,
overlay_desc->comp[i].plane + 1);
ctx->nb_planes = main_planes;
ctx->x_subsample = 1 << main_desc->log2_chroma_w;
ctx->y_subsample = 1 << main_desc->log2_chroma_h;
if (ctx->x_position % ctx->x_subsample ||
ctx->y_position % ctx->y_subsample) {
av_log(avctx, AV_LOG_WARNING, "Warning: overlay position (%d, %d) "
"does not match subsampling (%d, %d).\n",
ctx->x_position, ctx->y_position,
ctx->x_subsample, ctx->y_subsample);
}
if (main_planes == overlay_planes) {
if (main_desc->nb_components == overlay_desc->nb_components)
kernel = "overlay_no_alpha";
else
kernel = "overlay_internal_alpha";
ctx->alpha_separate = 0;
} else {
kernel = "overlay_external_alpha";
ctx->alpha_separate = 1;
}
av_log(avctx, AV_LOG_DEBUG, "Using kernel %s.\n", kernel);
err = ff_opencl_filter_load_program(avctx, &source, 1);
if (err < 0)
goto fail;
ctx->command_queue = clCreateCommandQueue(ctx->ocf.hwctx->context,
ctx->ocf.hwctx->device_id,
0, &cle);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create OpenCL "
"command queue %d.\n", cle);
ctx->kernel = clCreateKernel(ctx->ocf.program, kernel, &cle);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create kernel %d.\n", cle);
ctx->initialised = 1;
return 0;
fail:
if (ctx->command_queue)
clReleaseCommandQueue(ctx->command_queue);
if (ctx->kernel)
clReleaseKernel(ctx->kernel);
return err;
}
static int overlay_opencl_blend(FFFrameSync *fs)
{
AVFilterContext *avctx = fs->parent;
AVFilterLink *outlink = avctx->outputs[0];
OverlayOpenCLContext *ctx = avctx->priv;
AVFrame *input_main, *input_overlay;
AVFrame *output;
cl_mem mem;
cl_int cle, x, y;
size_t global_work[2];
int kernel_arg = 0;
int err, plane;
err = ff_framesync_get_frame(fs, 0, &input_main, 0);
if (err < 0)
return err;
err = ff_framesync_get_frame(fs, 1, &input_overlay, 0);
if (err < 0)
return err;
if (!ctx->initialised) {
AVHWFramesContext *main_fc =
(AVHWFramesContext*)input_main->hw_frames_ctx->data;
AVHWFramesContext *overlay_fc =
(AVHWFramesContext*)input_overlay->hw_frames_ctx->data;
err = overlay_opencl_load(avctx, main_fc->sw_format,
overlay_fc->sw_format);
if (err < 0)
return err;
}
output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!output) {
err = AVERROR(ENOMEM);
goto fail;
}
for (plane = 0; plane < ctx->nb_planes; plane++) {
kernel_arg = 0;
mem = (cl_mem)output->data[plane];
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
kernel_arg++;
mem = (cl_mem)input_main->data[plane];
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
kernel_arg++;
mem = (cl_mem)input_overlay->data[plane];
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
kernel_arg++;
if (ctx->alpha_separate) {
mem = (cl_mem)input_overlay->data[ctx->nb_planes];
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
kernel_arg++;
}
x = ctx->x_position / (plane == 0 ? 1 : ctx->x_subsample);
y = ctx->y_position / (plane == 0 ? 1 : ctx->y_subsample);
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &x);
kernel_arg++;
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &y);
kernel_arg++;
if (ctx->alpha_separate) {
cl_int alpha_adj_x = plane == 0 ? 1 : ctx->x_subsample;
cl_int alpha_adj_y = plane == 0 ? 1 : ctx->y_subsample;
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &alpha_adj_x);
kernel_arg++;
CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &alpha_adj_y);
kernel_arg++;
}
err = ff_opencl_filter_work_size_from_image(avctx, global_work,
output, plane, 0);
if (err < 0)
goto fail;
cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->kernel, 2, NULL,
global_work, NULL, 0, NULL, NULL);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue overlay kernel "
"for plane %d: %d.\n", plane, cle);
}
cle = clFinish(ctx->command_queue);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);
err = av_frame_copy_props(output, input_main);
av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
av_get_pix_fmt_name(output->format),
output->width, output->height, output->pts);
return ff_filter_frame(outlink, output);
fail:
av_frame_free(&output);
return err;
}
static int overlay_opencl_config_output(AVFilterLink *outlink)
{
AVFilterContext *avctx = outlink->src;
OverlayOpenCLContext *ctx = avctx->priv;
int err;
err = ff_opencl_filter_config_output(outlink);
if (err < 0)
return err;
err = ff_framesync_init_dualinput(&ctx->fs, avctx);
if (err < 0)
return err;
return ff_framesync_configure(&ctx->fs);
}
static av_cold int overlay_opencl_init(AVFilterContext *avctx)
{
OverlayOpenCLContext *ctx = avctx->priv;
ctx->fs.on_event = &overlay_opencl_blend;
return ff_opencl_filter_init(avctx);
}
static int overlay_opencl_activate(AVFilterContext *avctx)
{
OverlayOpenCLContext *ctx = avctx->priv;
return ff_framesync_activate(&ctx->fs);
}
static av_cold void overlay_opencl_uninit(AVFilterContext *avctx)
{
OverlayOpenCLContext *ctx = avctx->priv;
cl_int cle;
if (ctx->kernel) {
cle = clReleaseKernel(ctx->kernel);
if (cle != CL_SUCCESS)
av_log(avctx, AV_LOG_ERROR, "Failed to release "
"kernel: %d.\n", cle);
}
if (ctx->command_queue) {
cle = clReleaseCommandQueue(ctx->command_queue);
if (cle != CL_SUCCESS)
av_log(avctx, AV_LOG_ERROR, "Failed to release "
"command queue: %d.\n", cle);
}
ff_opencl_filter_uninit(avctx);
ff_framesync_uninit(&ctx->fs);
}
#define OFFSET(x) offsetof(OverlayOpenCLContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption overlay_opencl_options[] = {
{ "x", "Overlay x position",
OFFSET(x_position), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
{ "y", "Overlay y position",
OFFSET(y_position), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(overlay_opencl);
static const AVFilterPad overlay_opencl_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_opencl_filter_config_input,
},
{
.name = "overlay",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_opencl_filter_config_input,
},
{ NULL }
};
static const AVFilterPad overlay_opencl_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &overlay_opencl_config_output,
},
{ NULL }
};
AVFilter ff_vf_overlay_opencl = {
.name = "overlay_opencl",
.description = NULL_IF_CONFIG_SMALL("Overlay one video on top of another"),
.priv_size = sizeof(OverlayOpenCLContext),
.priv_class = &overlay_opencl_class,
.init = &overlay_opencl_init,
.uninit = &overlay_opencl_uninit,
.query_formats = &ff_opencl_filter_query_formats,
.activate = &overlay_opencl_activate,
.inputs = overlay_opencl_inputs,
.outputs = overlay_opencl_outputs,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};