/*
* 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 <float.h>
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "opencl.h"
#include "opencl_source.h"
#include "video.h"
#include "colorspace.h"
// TODO:
// - separate peak-detection from tone-mapping kernel to solve
// one-frame-delay issue.
// - more format support
#define DETECTION_FRAMES 63
enum TonemapAlgorithm {
TONEMAP_NONE,
TONEMAP_LINEAR,
TONEMAP_GAMMA,
TONEMAP_CLIP,
TONEMAP_REINHARD,
TONEMAP_HABLE,
TONEMAP_MOBIUS,
TONEMAP_MAX,
};
typedef struct TonemapOpenCLContext {
OpenCLFilterContext ocf;
enum AVColorSpace colorspace, colorspace_in, colorspace_out;
enum AVColorTransferCharacteristic trc, trc_in, trc_out;
enum AVColorPrimaries primaries, primaries_in, primaries_out;
enum AVColorRange range, range_in, range_out;
enum AVChromaLocation chroma_loc;
enum TonemapAlgorithm tonemap;
enum AVPixelFormat format;
double peak;
double param;
double desat_param;
double target_peak;
double scene_threshold;
int initialised;
cl_kernel kernel;
cl_command_queue command_queue;
cl_mem util_mem;
} TonemapOpenCLContext;
static const char *linearize_funcs[AVCOL_TRC_NB] = {
[AVCOL_TRC_SMPTE2084] = "eotf_st2084",
[AVCOL_TRC_ARIB_STD_B67] = "inverse_oetf_hlg",
};
static const char *delinearize_funcs[AVCOL_TRC_NB] = {
[AVCOL_TRC_BT709] = "inverse_eotf_bt1886",
[AVCOL_TRC_BT2020_10] = "inverse_eotf_bt1886",
};
static const struct PrimaryCoefficients primaries_table[AVCOL_PRI_NB] = {
[AVCOL_PRI_BT709] = { 0.640, 0.330, 0.300, 0.600, 0.150, 0.060 },
[AVCOL_PRI_BT2020] = { 0.708, 0.292, 0.170, 0.797, 0.131, 0.046 },
};
static const struct WhitepointCoefficients whitepoint_table[AVCOL_PRI_NB] = {
[AVCOL_PRI_BT709] = { 0.3127, 0.3290 },
[AVCOL_PRI_BT2020] = { 0.3127, 0.3290 },
};
static const char *tonemap_func[TONEMAP_MAX] = {
[TONEMAP_NONE] = "direct",
[TONEMAP_LINEAR] = "linear",
[TONEMAP_GAMMA] = "gamma",
[TONEMAP_CLIP] = "clip",
[TONEMAP_REINHARD] = "reinhard",
[TONEMAP_HABLE] = "hable",
[TONEMAP_MOBIUS] = "mobius",
};
static void get_rgb2rgb_matrix(enum AVColorPrimaries in, enum AVColorPrimaries out,
double rgb2rgb[3][3]) {
double rgb2xyz[3][3], xyz2rgb[3][3];
ff_fill_rgb2xyz_table(&primaries_table[out], &whitepoint_table[out], rgb2xyz);
ff_matrix_invert_3x3(rgb2xyz, xyz2rgb);
ff_fill_rgb2xyz_table(&primaries_table[in], &whitepoint_table[in], rgb2xyz);
ff_matrix_mul_3x3(rgb2rgb, rgb2xyz, xyz2rgb);
}
#define OPENCL_SOURCE_NB 3
// Average light level for SDR signals. This is equal to a signal level of 0.5
// under a typical presentation gamma of about 2.0.
static const float sdr_avg = 0.25f;
static int tonemap_opencl_init(AVFilterContext *avctx)
{
TonemapOpenCLContext *ctx = avctx->priv;
int rgb2rgb_passthrough = 1;
double rgb2rgb[3][3], rgb2yuv[3][3], yuv2rgb[3][3];
const struct LumaCoefficients *luma_src, *luma_dst;
cl_int cle;
int err;
AVBPrint header;
const char *opencl_sources[OPENCL_SOURCE_NB];
av_bprint_init(&header, 1024, AV_BPRINT_SIZE_AUTOMATIC);
switch(ctx->tonemap) {
case TONEMAP_GAMMA:
if (isnan(ctx->param))
ctx->param = 1.8f;
break;
case TONEMAP_REINHARD:
if (!isnan(ctx->param))
ctx->param = (1.0f - ctx->param) / ctx->param;
break;
case TONEMAP_MOBIUS:
if (isnan(ctx->param))
ctx->param = 0.3f;
break;
}
if (isnan(ctx->param))
ctx->param = 1.0f;
// SDR peak is 1.0f
ctx->target_peak = 1.0f;
av_log(ctx, AV_LOG_DEBUG, "tone mapping transfer from %s to %s\n",
av_color_transfer_name(ctx->trc_in),
av_color_transfer_name(ctx->trc_out));
av_log(ctx, AV_LOG_DEBUG, "mapping colorspace from %s to %s\n",
av_color_space_name(ctx->colorspace_in),
av_color_space_name(ctx->colorspace_out));
av_log(ctx, AV_LOG_DEBUG, "mapping primaries from %s to %s\n",
av_color_primaries_name(ctx->primaries_in),
av_color_primaries_name(ctx->primaries_out));
av_log(ctx, AV_LOG_DEBUG, "mapping range from %s to %s\n",
av_color_range_name(ctx->range_in),
av_color_range_name(ctx->range_out));
// checking valid value just because of limited implementaion
// please remove when more functionalities are implemented
av_assert0(ctx->trc_out == AVCOL_TRC_BT709 ||
ctx->trc_out == AVCOL_TRC_BT2020_10);
av_assert0(ctx->trc_in == AVCOL_TRC_SMPTE2084||
ctx->trc_in == AVCOL_TRC_ARIB_STD_B67);
av_assert0(ctx->colorspace_in == AVCOL_SPC_BT2020_NCL ||
ctx->colorspace_in == AVCOL_SPC_BT709);
av_assert0(ctx->primaries_in == AVCOL_PRI_BT2020 ||
ctx->primaries_in == AVCOL_PRI_BT709);
av_bprintf(&header, "__constant const float tone_param = %.4ff;\n",
ctx->param);
av_bprintf(&header, "__constant const float desat_param = %.4ff;\n",
ctx->desat_param);
av_bprintf(&header, "__constant const float target_peak = %.4ff;\n",
ctx->target_peak);
av_bprintf(&header, "__constant const float sdr_avg = %.4ff;\n", sdr_avg);
av_bprintf(&header, "__constant const float scene_threshold = %.4ff;\n",
ctx->scene_threshold);
av_bprintf(&header, "#define TONE_FUNC %s\n", tonemap_func[ctx->tonemap]);
av_bprintf(&header, "#define DETECTION_FRAMES %d\n", DETECTION_FRAMES);
if (ctx->primaries_out != ctx->primaries_in) {
get_rgb2rgb_matrix(ctx->primaries_in, ctx->primaries_out, rgb2rgb);
rgb2rgb_passthrough = 0;
}
if (ctx->range_in == AVCOL_RANGE_JPEG)
av_bprintf(&header, "#define FULL_RANGE_IN\n");
if (ctx->range_out == AVCOL_RANGE_JPEG)
av_bprintf(&header, "#define FULL_RANGE_OUT\n");
av_bprintf(&header, "#define chroma_loc %d\n", (int)ctx->chroma_loc);
if (rgb2rgb_passthrough)
av_bprintf(&header, "#define RGB2RGB_PASSTHROUGH\n");
else
ff_opencl_print_const_matrix_3x3(&header, "rgb2rgb", rgb2rgb);
luma_src = ff_get_luma_coefficients(ctx->colorspace_in);
if (!luma_src) {
err = AVERROR(EINVAL);
av_log(avctx, AV_LOG_ERROR, "unsupported input colorspace %d (%s)\n",
ctx->colorspace_in, av_color_space_name(ctx->colorspace_in));
goto fail;
}
luma_dst = ff_get_luma_coefficients(ctx->colorspace_out);
if (!luma_dst) {
err = AVERROR(EINVAL);
av_log(avctx, AV_LOG_ERROR, "unsupported output colorspace %d (%s)\n",
ctx->colorspace_out, av_color_space_name(ctx->colorspace_out));
goto fail;
}
ff_fill_rgb2yuv_table(luma_dst, rgb2yuv);
ff_opencl_print_const_matrix_3x3(&header, "yuv_matrix", rgb2yuv);
ff_fill_rgb2yuv_table(luma_src, rgb2yuv);
ff_matrix_invert_3x3(rgb2yuv, yuv2rgb);
ff_opencl_print_const_matrix_3x3(&header, "rgb_matrix", yuv2rgb);
av_bprintf(&header, "constant float3 luma_src = {%.4ff, %.4ff, %.4ff};\n",
luma_src->cr, luma_src->cg, luma_src->cb);
av_bprintf(&header, "constant float3 luma_dst = {%.4ff, %.4ff, %.4ff};\n",
luma_dst->cr, luma_dst->cg, luma_dst->cb);
av_bprintf(&header, "#define linearize %s\n", linearize_funcs[ctx->trc_in]);
av_bprintf(&header, "#define delinearize %s\n",
delinearize_funcs[ctx->trc_out]);
if (ctx->trc_in == AVCOL_TRC_ARIB_STD_B67)
av_bprintf(&header, "#define ootf_impl ootf_hlg\n");
if (ctx->trc_out == AVCOL_TRC_ARIB_STD_B67)
av_bprintf(&header, "#define inverse_ootf_impl inverse_ootf_hlg\n");
av_log(avctx, AV_LOG_DEBUG, "Generated OpenCL header:\n%s\n", header.str);
opencl_sources[0] = header.str;
opencl_sources[1] = ff_opencl_source_tonemap;
opencl_sources[2] = ff_opencl_source_colorspace_common;
err = ff_opencl_filter_load_program(avctx, opencl_sources, OPENCL_SOURCE_NB);
av_bprint_finalize(&header, NULL);
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, "tonemap", &cle);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create kernel %d.\n", cle);
ctx->util_mem =
clCreateBuffer(ctx->ocf.hwctx->context, 0,
(2 * DETECTION_FRAMES + 7) * sizeof(unsigned),
NULL, &cle);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create util buffer: %d.\n", cle);
ctx->initialised = 1;
return 0;
fail:
av_bprint_finalize(&header, NULL);
if (ctx->util_mem)
clReleaseMemObject(ctx->util_mem);
if (ctx->command_queue)
clReleaseCommandQueue(ctx->command_queue);
if (ctx->kernel)
clReleaseKernel(ctx->kernel);
return err;
}
static int tonemap_opencl_config_output(AVFilterLink *outlink)
{
AVFilterContext *avctx = outlink->src;
TonemapOpenCLContext *s = avctx->priv;
int ret;
if (s->format == AV_PIX_FMT_NONE)
av_log(avctx, AV_LOG_WARNING, "format not set, use default format NV12\n");
else {
if (s->format != AV_PIX_FMT_P010 &&
s->format != AV_PIX_FMT_NV12) {
av_log(avctx, AV_LOG_ERROR, "unsupported output format,"
"only p010/nv12 supported now\n");
return AVERROR(EINVAL);
}
}
s->ocf.output_format = s->format == AV_PIX_FMT_NONE ? AV_PIX_FMT_NV12 : s->format;
ret = ff_opencl_filter_config_output(outlink);
if (ret < 0)
return ret;
return 0;
}
static int launch_kernel(AVFilterContext *avctx, cl_kernel kernel,
AVFrame *output, AVFrame *input, float peak) {
TonemapOpenCLContext *ctx = avctx->priv;
int err = AVERROR(ENOSYS);
size_t global_work[2];
size_t local_work[2];
cl_int cle;
CL_SET_KERNEL_ARG(kernel, 0, cl_mem, &output->data[0]);
CL_SET_KERNEL_ARG(kernel, 1, cl_mem, &input->data[0]);
CL_SET_KERNEL_ARG(kernel, 2, cl_mem, &output->data[1]);
CL_SET_KERNEL_ARG(kernel, 3, cl_mem, &input->data[1]);
CL_SET_KERNEL_ARG(kernel, 4, cl_mem, &ctx->util_mem);
CL_SET_KERNEL_ARG(kernel, 5, cl_float, &peak);
local_work[0] = 16;
local_work[1] = 16;
// Note the work size based on uv plane, as we process a 2x2 quad in one workitem
err = ff_opencl_filter_work_size_from_image(avctx, global_work, output,
1, 16);
if (err < 0)
return err;
cle = clEnqueueNDRangeKernel(ctx->command_queue, kernel, 2, NULL,
global_work, local_work,
0, NULL, NULL);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue kernel: %d.\n", cle);
return 0;
fail:
return err;
}
static int tonemap_opencl_filter_frame(AVFilterLink *inlink, AVFrame *input)
{
AVFilterContext *avctx = inlink->dst;
AVFilterLink *outlink = avctx->outputs[0];
TonemapOpenCLContext *ctx = avctx->priv;
AVFrame *output = NULL;
cl_int cle;
int err;
double peak = ctx->peak;
AVHWFramesContext *input_frames_ctx =
(AVHWFramesContext*)input->hw_frames_ctx->data;
av_log(ctx, AV_LOG_DEBUG, "Filter input: %s, %ux%u (%"PRId64").\n",
av_get_pix_fmt_name(input->format),
input->width, input->height, input->pts);
if (!input->hw_frames_ctx)
return AVERROR(EINVAL);
output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!output) {
err = AVERROR(ENOMEM);
goto fail;
}
err = av_frame_copy_props(output, input);
if (err < 0)
goto fail;
if (!peak)
peak = ff_determine_signal_peak(input);
if (ctx->trc != -1)
output->color_trc = ctx->trc;
if (ctx->primaries != -1)
output->color_primaries = ctx->primaries;
if (ctx->colorspace != -1)
output->colorspace = ctx->colorspace;
if (ctx->range != -1)
output->color_range = ctx->range;
ctx->trc_in = input->color_trc;
ctx->trc_out = output->color_trc;
ctx->colorspace_in = input->colorspace;
ctx->colorspace_out = output->colorspace;
ctx->primaries_in = input->color_primaries;
ctx->primaries_out = output->color_primaries;
ctx->range_in = input->color_range;
ctx->range_out = output->color_range;
ctx->chroma_loc = output->chroma_location;
if (!ctx->initialised) {
if (!(input->color_trc == AVCOL_TRC_SMPTE2084 ||
input->color_trc == AVCOL_TRC_ARIB_STD_B67)) {
av_log(ctx, AV_LOG_ERROR, "unsupported transfer function characteristic.\n");
err = AVERROR(ENOSYS);
goto fail;
}
if (input_frames_ctx->sw_format != AV_PIX_FMT_P010) {
av_log(ctx, AV_LOG_ERROR, "unsupported format in tonemap_opencl.\n");
err = AVERROR(ENOSYS);
goto fail;
}
err = tonemap_opencl_init(avctx);
if (err < 0)
goto fail;
}
switch(input_frames_ctx->sw_format) {
case AV_PIX_FMT_P010:
err = launch_kernel(avctx, ctx->kernel, output, input, peak);
if (err < 0) goto fail;
break;
default:
err = AVERROR(ENOSYS);
goto fail;
}
cle = clFinish(ctx->command_queue);
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);
av_frame_free(&input);
ff_update_hdr_metadata(output, ctx->target_peak);
av_log(ctx, AV_LOG_DEBUG, "Tone-mapping output: %s, %ux%u (%"PRId64").\n",
av_get_pix_fmt_name(output->format),
output->width, output->height, output->pts);
#ifndef NDEBUG
{
uint32_t *ptr, *max_total_p, *avg_total_p, *frame_number_p;
float peak_detected, avg_detected;
unsigned map_size = (2 * DETECTION_FRAMES + 7) * sizeof(unsigned);
ptr = (void *)clEnqueueMapBuffer(ctx->command_queue, ctx->util_mem,
CL_TRUE, CL_MAP_READ, 0, map_size,
0, NULL, NULL, &cle);
// For the layout of the util buffer, refer tonemap.cl
if (ptr) {
max_total_p = ptr + 2 * (DETECTION_FRAMES + 1) + 1;
avg_total_p = max_total_p + 1;
frame_number_p = avg_total_p + 2;
peak_detected = (float)*max_total_p / (REFERENCE_WHITE * (*frame_number_p));
avg_detected = (float)*avg_total_p / (REFERENCE_WHITE * (*frame_number_p));
av_log(ctx, AV_LOG_DEBUG, "peak %f, avg %f will be used for next frame\n",
peak_detected, avg_detected);
clEnqueueUnmapMemObject(ctx->command_queue, ctx->util_mem, ptr, 0,
NULL, NULL);
}
}
#endif
return ff_filter_frame(outlink, output);
fail:
clFinish(ctx->command_queue);
av_frame_free(&input);
av_frame_free(&output);
return err;
}
static av_cold void tonemap_opencl_uninit(AVFilterContext *avctx)
{
TonemapOpenCLContext *ctx = avctx->priv;
cl_int cle;
if (ctx->util_mem)
clReleaseMemObject(ctx->util_mem);
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);
}
#define OFFSET(x) offsetof(TonemapOpenCLContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption tonemap_opencl_options[] = {
{ "tonemap", "tonemap algorithm selection", OFFSET(tonemap), AV_OPT_TYPE_INT, {.i64 = TONEMAP_NONE}, TONEMAP_NONE, TONEMAP_MAX - 1, FLAGS, "tonemap" },
{ "none", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_NONE}, 0, 0, FLAGS, "tonemap" },
{ "linear", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_LINEAR}, 0, 0, FLAGS, "tonemap" },
{ "gamma", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_GAMMA}, 0, 0, FLAGS, "tonemap" },
{ "clip", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_CLIP}, 0, 0, FLAGS, "tonemap" },
{ "reinhard", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_REINHARD}, 0, 0, FLAGS, "tonemap" },
{ "hable", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_HABLE}, 0, 0, FLAGS, "tonemap" },
{ "mobius", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_MOBIUS}, 0, 0, FLAGS, "tonemap" },
{ "transfer", "set transfer characteristic", OFFSET(trc), AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_BT709}, -1, INT_MAX, FLAGS, "transfer" },
{ "t", "set transfer characteristic", OFFSET(trc), AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_BT709}, -1, INT_MAX, FLAGS, "transfer" },
{ "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709}, 0, 0, FLAGS, "transfer" },
{ "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10}, 0, 0, FLAGS, "transfer" },
{ "matrix", "set colorspace matrix", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
{ "m", "set colorspace matrix", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
{ "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_SPC_BT709}, 0, 0, FLAGS, "matrix" },
{ "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_SPC_BT2020_NCL}, 0, 0, FLAGS, "matrix" },
{ "primaries", "set color primaries", OFFSET(primaries), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
{ "p", "set color primaries", OFFSET(primaries), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
{ "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_PRI_BT709}, 0, 0, FLAGS, "primaries" },
{ "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_PRI_BT2020}, 0, 0, FLAGS, "primaries" },
{ "range", "set color range", OFFSET(range), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "range" },
{ "r", "set color range", OFFSET(range), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "range" },
{ "tv", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
{ "pc", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
{ "limited", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
{ "full", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
{ "format", "output pixel format", OFFSET(format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, AV_PIX_FMT_NONE, INT_MAX, FLAGS, "fmt" },
{ "peak", "signal peak override", OFFSET(peak), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, DBL_MAX, FLAGS },
{ "param", "tonemap parameter", OFFSET(param), AV_OPT_TYPE_DOUBLE, {.dbl = NAN}, DBL_MIN, DBL_MAX, FLAGS },
{ "desat", "desaturation parameter", OFFSET(desat_param), AV_OPT_TYPE_DOUBLE, {.dbl = 0.5}, 0, DBL_MAX, FLAGS },
{ "threshold", "scene detection threshold", OFFSET(scene_threshold), AV_OPT_TYPE_DOUBLE, {.dbl = 0.2}, 0, DBL_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(tonemap_opencl);
static const AVFilterPad tonemap_opencl_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = &tonemap_opencl_filter_frame,
.config_props = &ff_opencl_filter_config_input,
},
{ NULL }
};
static const AVFilterPad tonemap_opencl_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &tonemap_opencl_config_output,
},
{ NULL }
};
AVFilter ff_vf_tonemap_opencl = {
.name = "tonemap_opencl",
.description = NULL_IF_CONFIG_SMALL("Perform HDR to SDR conversion with tonemapping."),
.priv_size = sizeof(TonemapOpenCLContext),
.priv_class = &tonemap_opencl_class,
.init = &ff_opencl_filter_init,
.uninit = &tonemap_opencl_uninit,
.query_formats = &ff_opencl_filter_query_formats,
.inputs = tonemap_opencl_inputs,
.outputs = tonemap_opencl_outputs,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};