mirror of https://git.ffmpeg.org/ffmpeg.git
243 lines
7.9 KiB
C
243 lines
7.9 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "opencl.h"
|
|
#include "opencl_source.h"
|
|
#include "video.h"
|
|
|
|
typedef struct ColorkeyOpenCLContext {
|
|
OpenCLFilterContext ocf;
|
|
// Whether or not the above `OpenCLFilterContext` has been initialized
|
|
int initialized;
|
|
|
|
cl_command_queue command_queue;
|
|
cl_kernel kernel_colorkey;
|
|
|
|
// The color we are supposed to replace with transparency
|
|
uint8_t colorkey_rgba[4];
|
|
// Stored as a normalized float for passing to the OpenCL kernel
|
|
cl_float4 colorkey_rgba_float;
|
|
// Similarity percentage compared to `colorkey_rgba`, ranging from `0.01` to `1.0`
|
|
// where `0.01` matches only the key color and `1.0` matches all colors
|
|
float similarity;
|
|
// Blending percentage where `0.0` results in fully transparent pixels, `1.0` results
|
|
// in fully opaque pixels, and numbers in between result in transparency that varies
|
|
// based on the similarity to the key color
|
|
float blend;
|
|
} ColorkeyOpenCLContext;
|
|
|
|
static int colorkey_opencl_init(AVFilterContext *avctx)
|
|
{
|
|
ColorkeyOpenCLContext *ctx = avctx->priv;
|
|
cl_int cle;
|
|
int err;
|
|
|
|
err = ff_opencl_filter_load_program(avctx, &ff_opencl_source_colorkey, 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);
|
|
|
|
if (ctx->blend > 0.0001) {
|
|
ctx->kernel_colorkey = clCreateKernel(ctx->ocf.program, "colorkey_blend", &cle);
|
|
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create colorkey_blend kernel: %d.\n", cle);
|
|
} else {
|
|
ctx->kernel_colorkey = clCreateKernel(ctx->ocf.program, "colorkey", &cle);
|
|
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create colorkey kernel: %d.\n", cle);
|
|
}
|
|
|
|
for (int i = 0; i < 4; ++i) {
|
|
ctx->colorkey_rgba_float.s[i] = (float)ctx->colorkey_rgba[i] / 255.0;
|
|
}
|
|
|
|
ctx->initialized = 1;
|
|
return 0;
|
|
|
|
fail:
|
|
if (ctx->command_queue)
|
|
clReleaseCommandQueue(ctx->command_queue);
|
|
if (ctx->kernel_colorkey)
|
|
clReleaseKernel(ctx->kernel_colorkey);
|
|
return err;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *link, AVFrame *input_frame)
|
|
{
|
|
AVFilterContext *avctx = link->dst;
|
|
AVFilterLink *outlink = avctx->outputs[0];
|
|
ColorkeyOpenCLContext *colorkey_ctx = avctx->priv;
|
|
AVFrame *output_frame = NULL;
|
|
int err;
|
|
cl_int cle;
|
|
size_t global_work[2];
|
|
cl_mem src, dst;
|
|
|
|
if (!input_frame->hw_frames_ctx)
|
|
return AVERROR(EINVAL);
|
|
|
|
if (!colorkey_ctx->initialized) {
|
|
AVHWFramesContext *input_frames_ctx =
|
|
(AVHWFramesContext*)input_frame->hw_frames_ctx->data;
|
|
int fmt = input_frames_ctx->sw_format;
|
|
|
|
// Make sure the input is a format we support
|
|
if (fmt != AV_PIX_FMT_ARGB &&
|
|
fmt != AV_PIX_FMT_RGBA &&
|
|
fmt != AV_PIX_FMT_ABGR &&
|
|
fmt != AV_PIX_FMT_BGRA
|
|
) {
|
|
av_log(avctx, AV_LOG_ERROR, "unsupported (non-RGB) format in colorkey_opencl.\n");
|
|
err = AVERROR(ENOSYS);
|
|
goto fail;
|
|
}
|
|
|
|
err = colorkey_opencl_init(avctx);
|
|
if (err < 0)
|
|
goto fail;
|
|
}
|
|
|
|
// This filter only operates on RGB data and we know that will be on the first plane
|
|
src = (cl_mem)input_frame->data[0];
|
|
output_frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!output_frame) {
|
|
err = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
dst = (cl_mem)output_frame->data[0];
|
|
|
|
CL_SET_KERNEL_ARG(colorkey_ctx->kernel_colorkey, 0, cl_mem, &src);
|
|
CL_SET_KERNEL_ARG(colorkey_ctx->kernel_colorkey, 1, cl_mem, &dst);
|
|
CL_SET_KERNEL_ARG(colorkey_ctx->kernel_colorkey, 2, cl_float4, &colorkey_ctx->colorkey_rgba_float);
|
|
CL_SET_KERNEL_ARG(colorkey_ctx->kernel_colorkey, 3, float, &colorkey_ctx->similarity);
|
|
if (colorkey_ctx->blend > 0.0001) {
|
|
CL_SET_KERNEL_ARG(colorkey_ctx->kernel_colorkey, 4, float, &colorkey_ctx->blend);
|
|
}
|
|
|
|
err = ff_opencl_filter_work_size_from_image(avctx, global_work, input_frame, 0, 0);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
cle = clEnqueueNDRangeKernel(
|
|
colorkey_ctx->command_queue,
|
|
colorkey_ctx->kernel_colorkey,
|
|
2,
|
|
NULL,
|
|
global_work,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue colorkey kernel: %d.\n", cle);
|
|
|
|
// Run queued kernel
|
|
cle = clFinish(colorkey_ctx->command_queue);
|
|
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);
|
|
|
|
err = av_frame_copy_props(output_frame, input_frame);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
av_frame_free(&input_frame);
|
|
|
|
return ff_filter_frame(outlink, output_frame);
|
|
|
|
fail:
|
|
clFinish(colorkey_ctx->command_queue);
|
|
av_frame_free(&input_frame);
|
|
av_frame_free(&output_frame);
|
|
return err;
|
|
}
|
|
|
|
static av_cold void colorkey_opencl_uninit(AVFilterContext *avctx)
|
|
{
|
|
ColorkeyOpenCLContext *ctx = avctx->priv;
|
|
cl_int cle;
|
|
|
|
if (ctx->kernel_colorkey) {
|
|
cle = clReleaseKernel(ctx->kernel_colorkey);
|
|
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);
|
|
}
|
|
|
|
static const AVFilterPad colorkey_opencl_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
.config_props = &ff_opencl_filter_config_input,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad colorkey_opencl_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = &ff_opencl_filter_config_output,
|
|
},
|
|
};
|
|
|
|
#define OFFSET(x) offsetof(ColorkeyOpenCLContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
|
|
static const AVOption colorkey_opencl_options[] = {
|
|
{ "color", "set the colorkey key color", OFFSET(colorkey_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, 0, 0, FLAGS },
|
|
{ "similarity", "set the colorkey similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01 }, 0.01, 1.0, FLAGS },
|
|
{ "blend", "set the colorkey key blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(colorkey_opencl);
|
|
|
|
const AVFilter ff_vf_colorkey_opencl = {
|
|
.name = "colorkey_opencl",
|
|
.description = NULL_IF_CONFIG_SMALL("Turns a certain color into transparency. Operates on RGB colors."),
|
|
.priv_size = sizeof(ColorkeyOpenCLContext),
|
|
.priv_class = &colorkey_opencl_class,
|
|
.init = &ff_opencl_filter_init,
|
|
.uninit = &colorkey_opencl_uninit,
|
|
FILTER_INPUTS(colorkey_opencl_inputs),
|
|
FILTER_OUTPUTS(colorkey_opencl_outputs),
|
|
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_OPENCL),
|
|
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE
|
|
};
|