0,0 → 1,312 |
/* |
* Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com> |
* Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org> |
* Relicensed to the LGPL with permission from Remi Guyomarch. |
* |
* 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 |
*/ |
|
/** |
* @file |
* blur / sharpen filter, ported to FFmpeg from MPlayer |
* libmpcodecs/unsharp.c. |
* |
* This code is based on: |
* |
* An Efficient algorithm for Gaussian blur using finite-state machines |
* Frederick M. Waltz and John W. V. Miller |
* |
* SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII |
* Originally published Boston, Nov 98 |
* |
* http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf |
*/ |
|
#include "avfilter.h" |
#include "formats.h" |
#include "internal.h" |
#include "video.h" |
#include "libavutil/common.h" |
#include "libavutil/imgutils.h" |
#include "libavutil/mem.h" |
#include "libavutil/opt.h" |
#include "libavutil/pixdesc.h" |
#include "unsharp.h" |
#include "unsharp_opencl.h" |
|
static void apply_unsharp( uint8_t *dst, int dst_stride, |
const uint8_t *src, int src_stride, |
int width, int height, UnsharpFilterParam *fp) |
{ |
uint32_t **sc = fp->sc; |
uint32_t sr[MAX_MATRIX_SIZE - 1], tmp1, tmp2; |
|
int32_t res; |
int x, y, z; |
const uint8_t *src2 = NULL; //silence a warning |
const int amount = fp->amount; |
const int steps_x = fp->steps_x; |
const int steps_y = fp->steps_y; |
const int scalebits = fp->scalebits; |
const int32_t halfscale = fp->halfscale; |
|
if (!amount) { |
av_image_copy_plane(dst, dst_stride, src, src_stride, width, height); |
return; |
} |
|
for (y = 0; y < 2 * steps_y; y++) |
memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x)); |
|
for (y = -steps_y; y < height + steps_y; y++) { |
if (y < height) |
src2 = src; |
|
memset(sr, 0, sizeof(sr[0]) * (2 * steps_x - 1)); |
for (x = -steps_x; x < width + steps_x; x++) { |
tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x]; |
for (z = 0; z < steps_x * 2; z += 2) { |
tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1; |
tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2; |
} |
for (z = 0; z < steps_y * 2; z += 2) { |
tmp2 = sc[z + 0][x + steps_x] + tmp1; sc[z + 0][x + steps_x] = tmp1; |
tmp1 = sc[z + 1][x + steps_x] + tmp2; sc[z + 1][x + steps_x] = tmp2; |
} |
if (x >= steps_x && y >= steps_y) { |
const uint8_t *srx = src - steps_y * src_stride + x - steps_x; |
uint8_t *dsx = dst - steps_y * dst_stride + x - steps_x; |
|
res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> 16); |
*dsx = av_clip_uint8(res); |
} |
} |
if (y >= 0) { |
dst += dst_stride; |
src += src_stride; |
} |
} |
} |
|
static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out) |
{ |
AVFilterLink *inlink = ctx->inputs[0]; |
UnsharpContext *unsharp = ctx->priv; |
int i, plane_w[3], plane_h[3]; |
UnsharpFilterParam *fp[3]; |
plane_w[0] = inlink->w; |
plane_w[1] = plane_w[2] = FF_CEIL_RSHIFT(inlink->w, unsharp->hsub); |
plane_h[0] = inlink->h; |
plane_h[1] = plane_h[2] = FF_CEIL_RSHIFT(inlink->h, unsharp->vsub); |
fp[0] = &unsharp->luma; |
fp[1] = fp[2] = &unsharp->chroma; |
for (i = 0; i < 3; i++) { |
apply_unsharp(out->data[i], out->linesize[i], in->data[i], in->linesize[i], plane_w[i], plane_h[i], fp[i]); |
} |
return 0; |
} |
|
static void set_filter_param(UnsharpFilterParam *fp, int msize_x, int msize_y, float amount) |
{ |
fp->msize_x = msize_x; |
fp->msize_y = msize_y; |
fp->amount = amount * 65536.0; |
|
fp->steps_x = msize_x / 2; |
fp->steps_y = msize_y / 2; |
fp->scalebits = (fp->steps_x + fp->steps_y) * 2; |
fp->halfscale = 1 << (fp->scalebits - 1); |
} |
|
static av_cold int init(AVFilterContext *ctx) |
{ |
int ret = 0; |
UnsharpContext *unsharp = ctx->priv; |
|
|
set_filter_param(&unsharp->luma, unsharp->lmsize_x, unsharp->lmsize_y, unsharp->lamount); |
set_filter_param(&unsharp->chroma, unsharp->cmsize_x, unsharp->cmsize_y, unsharp->camount); |
|
unsharp->apply_unsharp = apply_unsharp_c; |
if (!CONFIG_OPENCL && unsharp->opencl) { |
av_log(ctx, AV_LOG_ERROR, "OpenCL support was not enabled in this build, cannot be selected\n"); |
return AVERROR(EINVAL); |
} |
if (CONFIG_OPENCL && unsharp->opencl) { |
unsharp->apply_unsharp = ff_opencl_apply_unsharp; |
ret = ff_opencl_unsharp_init(ctx); |
if (ret < 0) |
return ret; |
} |
return 0; |
} |
|
static int query_formats(AVFilterContext *ctx) |
{ |
static const enum AVPixelFormat pix_fmts[] = { |
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P, |
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE |
}; |
|
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
|
return 0; |
} |
|
static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width) |
{ |
int z; |
const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen"; |
|
if (!(fp->msize_x & fp->msize_y & 1)) { |
av_log(ctx, AV_LOG_ERROR, |
"Invalid even size for %s matrix size %dx%d\n", |
effect_type, fp->msize_x, fp->msize_y); |
return AVERROR(EINVAL); |
} |
|
av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n", |
effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0); |
|
for (z = 0; z < 2 * fp->steps_y; z++) |
if (!(fp->sc[z] = av_malloc(sizeof(*(fp->sc[z])) * (width + 2 * fp->steps_x)))) |
return AVERROR(ENOMEM); |
|
return 0; |
} |
|
static int config_props(AVFilterLink *link) |
{ |
UnsharpContext *unsharp = link->dst->priv; |
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); |
int ret; |
|
unsharp->hsub = desc->log2_chroma_w; |
unsharp->vsub = desc->log2_chroma_h; |
|
ret = init_filter_param(link->dst, &unsharp->luma, "luma", link->w); |
if (ret < 0) |
return ret; |
ret = init_filter_param(link->dst, &unsharp->chroma, "chroma", FF_CEIL_RSHIFT(link->w, unsharp->hsub)); |
if (ret < 0) |
return ret; |
|
return 0; |
} |
|
static void free_filter_param(UnsharpFilterParam *fp) |
{ |
int z; |
|
for (z = 0; z < 2 * fp->steps_y; z++) |
av_free(fp->sc[z]); |
} |
|
static av_cold void uninit(AVFilterContext *ctx) |
{ |
UnsharpContext *unsharp = ctx->priv; |
|
if (CONFIG_OPENCL && unsharp->opencl) { |
ff_opencl_unsharp_uninit(ctx); |
} |
|
free_filter_param(&unsharp->luma); |
free_filter_param(&unsharp->chroma); |
} |
|
static int filter_frame(AVFilterLink *link, AVFrame *in) |
{ |
UnsharpContext *unsharp = link->dst->priv; |
AVFilterLink *outlink = link->dst->outputs[0]; |
AVFrame *out; |
int ret = 0; |
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
if (!out) { |
av_frame_free(&in); |
return AVERROR(ENOMEM); |
} |
av_frame_copy_props(out, in); |
if (CONFIG_OPENCL && unsharp->opencl) { |
ret = ff_opencl_unsharp_process_inout_buf(link->dst, in, out); |
if (ret < 0) |
goto end; |
} |
|
ret = unsharp->apply_unsharp(link->dst, in, out); |
end: |
av_frame_free(&in); |
|
if (ret < 0) |
return ret; |
return ff_filter_frame(outlink, out); |
} |
|
#define OFFSET(x) offsetof(UnsharpContext, x) |
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
#define MIN_SIZE 3 |
#define MAX_SIZE 63 |
static const AVOption unsharp_options[] = { |
{ "luma_msize_x", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "lx", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "luma_msize_y", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "ly", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "luma_amount", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, |
{ "la", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, |
{ "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "cx", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "chroma_msize_y", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "cy", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
{ "chroma_amount", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, |
{ "ca", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, |
{ "opencl", "use OpenCL filtering capabilities", OFFSET(opencl), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS }, |
{ NULL } |
}; |
|
AVFILTER_DEFINE_CLASS(unsharp); |
|
static const AVFilterPad avfilter_vf_unsharp_inputs[] = { |
{ |
.name = "default", |
.type = AVMEDIA_TYPE_VIDEO, |
.filter_frame = filter_frame, |
.config_props = config_props, |
}, |
{ NULL } |
}; |
|
static const AVFilterPad avfilter_vf_unsharp_outputs[] = { |
{ |
.name = "default", |
.type = AVMEDIA_TYPE_VIDEO, |
}, |
{ NULL } |
}; |
|
AVFilter avfilter_vf_unsharp = { |
.name = "unsharp", |
.description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."), |
.priv_size = sizeof(UnsharpContext), |
.priv_class = &unsharp_class, |
.init = init, |
.uninit = uninit, |
.query_formats = query_formats, |
.inputs = avfilter_vf_unsharp_inputs, |
.outputs = avfilter_vf_unsharp_outputs, |
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
}; |