[FFmpeg-devel] [PATCH 2/2] lavf: Add coreimage filter for GPU based image filtering on OSX.
Thilo Borgmann
thilo.borgmann at mail.de
Sat Mar 19 16:31:56 CET 2016
All comments addressed, linux compilation fixed.
-Thilo
-------------- next part --------------
From ef8588871eb3fa05b8f4e3bea12f00ad7728ac05 Mon Sep 17 00:00:00 2001
From: Thilo Borgmann <thilo.borgmann at mail.de>
Date: Sat, 19 Mar 2016 16:28:40 +0100
Subject: [PATCH 2/2] lavfi: Add coreimage filter for GPU based image filtering
on OSX.
---
Changelog | 1 +
MAINTAINERS | 1 +
configure | 4 +
doc/filters.texi | 166 +++++++++++
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 2 +
libavfilter/version.h | 2 +-
libavfilter/vf_coreimage.m | 688 +++++++++++++++++++++++++++++++++++++++++++++
8 files changed, 865 insertions(+), 1 deletion(-)
create mode 100644 libavfilter/vf_coreimage.m
diff --git a/Changelog b/Changelog
index 1f57f5e..5053a86 100644
--- a/Changelog
+++ b/Changelog
@@ -12,6 +12,7 @@ version <next>:
- ciescope filter
- protocol blacklisting API
- MediaCodec H264 decoding
+- coreimage filter (GPU based image filtering on OSX)
version 3.0:
diff --git a/MAINTAINERS b/MAINTAINERS
index 531c21d..a993a67 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -370,6 +370,7 @@ Filters:
vf_colorbalance.c Paul B Mahol
vf_colorkey.c Timo Rothenpieler
vf_colorlevels.c Paul B Mahol
+ vf_coreimage.m Thilo Borgmann
vf_deband.c Paul B Mahol
vf_dejudder.c Nicholas Robbins
vf_delogo.c Jean Delvare (CC <jdelvare at suse.com>)
diff --git a/configure b/configure
index 1b189328..82c4511 100755
--- a/configure
+++ b/configure
@@ -5255,6 +5255,8 @@ frei0r_filter_extralibs='$ldl'
frei0r_src_filter_extralibs='$ldl'
ladspa_filter_extralibs='$ldl'
nvenc_encoder_extralibs='$ldl'
+coreimage_filter_extralibs="-framework QuartzCore -framework AppKit -framework OpenGL"
+coreimagesrc_filter_extralibs="-framework QuartzCore -framework AppKit -framework OpenGL"
if ! disabled network; then
check_func getaddrinfo $network_extralibs
@@ -5483,6 +5485,8 @@ enabled avisynth && { { check_lib2 "windows.h" LoadLibrary; } ||
die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
enabled cuda && check_lib cuda.h cuInit -lcuda
enabled chromaprint && require chromaprint chromaprint.h chromaprint_get_version -lchromaprint
+enabled coreimage_filter && { check_header_objcc QuartzCore/CoreImage.h || disable coreimage_filter; }
+enabled coreimagesrc_filter && { check_header_objcc QuartzCore/CoreImage.h || disable coreimagesrc_filter; }
enabled decklink && { check_header DeckLinkAPI.h || die "ERROR: DeckLinkAPI.h header not found"; }
enabled frei0r && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
enabled gmp && require2 gmp gmp.h mpz_export -lgmp
diff --git a/doc/filters.texi b/doc/filters.texi
index c093927..dfa6c59 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4955,6 +4955,111 @@ convolution="-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2:-2 -
Copy the input source unchanged to the output. This is mainly useful for
testing purposes.
+ at anchor{coreimage}
+ at section coreimage
+Video filtering on GPU using Apple's CoreImage API on OSX.
+
+Hardware acceleration is based on an OpenGL context. Usually, this means it is
+processed by video hardware. However, software-based OpenGL implementations
+exist which means there is no guarantee for hardware processing. It depends on
+the respective OSX.
+
+There are many filters and image generators provided by Apple that come with a
+large variety of options. The filter has to be referenced by its name along
+with its options.
+
+The coreimage filter accepts the following options:
+ at table @option
+ at item list_filters
+List all available filters and generators along with all their respective
+options as well as possible minimum and maximum values along with the default
+values.
+ at example
+list_filters=true
+ at end example
+
+ at item filter
+Specify all filters by their respective name and options.
+Use @var{list_filters} to determine all valid filter names and options.
+Numerical options are specified by a float value and are automatically clamped
+to their respective value range. Vector and color options have to be specified
+by a list of space separated float values. Character escaping has to be done.
+A special option name @code{default} is available to use default options for a
+filter.
+
+It is required to specify either @code{default} or at least one of the filter options.
+All omitted options are used with their default values.
+The syntax of the filter string is as follows:
+ at example
+filter=<NAME>@@<OPTION>=<VALUE>[@@<OPTION>=<VALUE>][@@...][#<NAME>@@<OPTION>=<VALUE>[@@<OPTION>=<VALUE>][@@...]][#...]
+ at end example
+
+ at item output_rect
+Specify a rectangle where the output of the filter chain is copied into the
+input image. It is given by a list of space separated float values:
+ at example
+output_rect=x\ y\ width\ height
+ at end example
+If not given, the output rectangle equals the dimensions of the input image.
+The output rectangle is automatically cropped at the borders of the input
+image. Negative values are valid for each component.
+ at example
+output_rect=25\ 25\ 100\ 100
+ at end example
+ at end table
+
+Several filters can be chained for successive processing without GPU-HOST
+transfers allowing for fast processing of complex filter chains.
+Currently, only filters with zero (generators) or exactly one (filters) input
+image and one output image are supported. Also, transition filters are not yet
+usable as intended.
+
+Some filters generate output images with additional padding depending on the
+respective filter kernel. The padding is automatically removed to ensure the
+filter output has the same size as the input image.
+
+For image generators, the size of the output image is determined by the
+previous output image of the filter chain or the input image of the whole
+filterchain, respectively. The generators do not use the pixel information of
+this image to generate their output. However, the generated output is
+blended onto this image, resulting in partial or complete coverage of the
+output image.
+
+The @ref{coreimagesrc} video source can be used for generating input images
+which are directly fed into the filter chain. By using it, providing input
+images by another video source or an input video is not required.
+
+ at subsection Examples
+
+ at itemize
+
+ at item
+List all filters available:
+ at example
+coreimage=list_filters=true
+ at end example
+
+ at item
+Use the CIBoxBlur filter with default options to blur an image:
+ at example
+coreimage=filter=CIBoxBlur@@default
+ at end example
+
+ at item
+Use a filter chain with CISepiaTone at default values and CIVignetteEffect with
+its center at 100x100 and a radius of 50 pixels:
+ at example
+coreimage=filter=CIBoxBlur@@default#CIVignetteEffect@@inputCenter=100\ 100@@inputRadius=50
+ at end example
+
+ at item
+Use nullsrc and CIQRCodeGenerator to create a QR code for the FFmpeg homepage,
+given as complete and escaped command-line for Apple's standard bash shell:
+ at example
+ffmpeg -f lavfi -i nullsrc=s=100x100,coreimage=filter=CIQRCodeGenerator@@inputMessage=https\\\\\://FFmpeg.org/@@inputCorrectionLevel=H -frames:v 1 QRCode.png
+ at end example
+ at end itemize
+
@section crop
Crop the input video to given dimensions.
@@ -13801,6 +13906,67 @@ cellauto=p='@@@@ @@ @@@@':s=100x400:full=0:rule=18
@end itemize
+ at anchor{coreimagesrc}
+ at section coreimagesrc
+Video source generated on GPU using Apple's CoreImage API on OSX.
+
+This video source is a specialized version of the @ref{coreimage} video filter.
+Use a core image generator at the beginning of the applied filterchain to
+generate the content.
+
+The coreimagesrc video source accepts the following options:
+ at table @option
+ at item list_generators
+List all available generators along with all their respective options as well as
+possible minimum and maximum values along with the default values.
+ at example
+list_generators=true
+ at end example
+
+ at item size, s
+Specify the size of the sourced video. For the syntax of this option, check the
+ at ref{video size syntax,,"Video size" section in the ffmpeg-utils manual,ffmpeg-utils}.
+The default value is @code{320x240}.
+
+ at item rate, r
+Specify the frame rate of the sourced video, as the number of frames
+generated per second. It has to be a string in the format
+ at var{frame_rate_num}/@var{frame_rate_den}, an integer number, a floating point
+number or a valid video frame rate abbreviation. The default value is
+"25".
+
+ at item sar
+Set the sample aspect ratio of the sourced video.
+
+ at item duration, d
+Set the duration of the sourced video. See
+ at ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
+for the accepted syntax.
+
+If not specified, or the expressed duration is negative, the video is
+supposed to be generated forever.
+ at end table
+
+Additionally, all options of the @ref{coreimage} video filter are accepted.
+A complete filterchain can be used for further processing of the
+generated input without CPU-HOST transfer. See @ref{coreimage} documentation
+and examples for details.
+
+ at subsection Examples
+
+ at itemize
+
+ at item
+Use CIQRCodeGenerator to create a QR code for the FFmpeg homepage,
+given as complete and escaped command-line for Apple's standard bash shell:
+ at example
+ffmpeg -f lavfi -i coreimagesrc=s=100x100:filter=CIQRCodeGenerator@@inputMessage=https\\\\\://FFmpeg.org/@@inputCorrectionLevel=H -frames:v 1 QRCode.png
+ at end example
+This example is equivalent to the QRCode example of @ref{coreimage} without the
+need for a nullsrc video source.
+ at end itemize
+
+
@section mandelbrot
Generate a Mandelbrot set fractal, and progressively zoom towards the
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 956a077..b6e1999 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -133,6 +133,7 @@ OBJS-$(CONFIG_COLORLEVELS_FILTER) += vf_colorlevels.o
OBJS-$(CONFIG_COLORMATRIX_FILTER) += vf_colormatrix.o
OBJS-$(CONFIG_CONVOLUTION_FILTER) += vf_convolution.o
OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o
+OBJS-$(CONFIG_COREIMAGE_FILTER) += vf_coreimage.o
OBJS-$(CONFIG_COVER_RECT_FILTER) += vf_cover_rect.o lavfutils.o
OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
@@ -282,6 +283,7 @@ OBJS-$(CONFIG_ALLRGB_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_ALLYUV_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_CELLAUTO_FILTER) += vsrc_cellauto.o
OBJS-$(CONFIG_COLOR_FILTER) += vsrc_testsrc.o
+OBJS-$(CONFIG_COREIMAGESRC_FILTER) += vf_coreimage.o
OBJS-$(CONFIG_FREI0R_SRC_FILTER) += vf_frei0r.o
OBJS-$(CONFIG_HALDCLUTSRC_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_LIFE_FILTER) += vsrc_life.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index e5080b5..5c18fd1 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -154,6 +154,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(COLORMATRIX, colormatrix, vf);
REGISTER_FILTER(CONVOLUTION, convolution, vf);
REGISTER_FILTER(COPY, copy, vf);
+ REGISTER_FILTER(COREIMAGE, coreimage, vf);
REGISTER_FILTER(COVER_RECT, cover_rect, vf);
REGISTER_FILTER(CROP, crop, vf);
REGISTER_FILTER(CROPDETECT, cropdetect, vf);
@@ -302,6 +303,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(ALLYUV, allyuv, vsrc);
REGISTER_FILTER(CELLAUTO, cellauto, vsrc);
REGISTER_FILTER(COLOR, color, vsrc);
+ REGISTER_FILTER(COREIMAGESRC, coreimagesrc, vsrc);
REGISTER_FILTER(FREI0R, frei0r_src, vsrc);
REGISTER_FILTER(HALDCLUTSRC, haldclutsrc, vsrc);
REGISTER_FILTER(LIFE, life, vsrc);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 80e7c71..94c6bdc 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 6
-#define LIBAVFILTER_VERSION_MINOR 39
+#define LIBAVFILTER_VERSION_MINOR 40
#define LIBAVFILTER_VERSION_MICRO 102
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_coreimage.m b/libavfilter/vf_coreimage.m
new file mode 100644
index 0000000..0b93049
--- /dev/null
+++ b/libavfilter/vf_coreimage.m
@@ -0,0 +1,688 @@
+/*
+ * Copyright (c) 2016 Thilo Borgmann
+ *
+ * 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
+ * Video processing based on Apple's CoreImage API
+ */
+
+#import <QuartzCore/CoreImage.h>
+#import <AppKit/AppKit.h>
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+typedef struct CoreImageContext {
+ const AVClass *class;
+
+ int is_video_source; ///< filter is used as video source
+
+ int w, h; ///< video size
+ AVRational sar; ///< sample aspect ratio
+ AVRational frame_rate; ///< video frame rate
+ AVRational time_base; ///< stream time base
+ int64_t duration; ///< duration expressed in microseconds
+ int64_t pts; ///< increasing presentation time stamp
+ AVFrame *picref; ///< cached reference containing the painted picture
+
+ CFTypeRef glctx; ///< OpenGL context
+ CGContextRef cgctx; ///< Bitmap context for image copy
+ CFTypeRef input_image; ///< Input image container for passing into Core Image API
+ CGColorSpaceRef color_space; ///< Common color space for input image and cgcontext
+ int bits_per_component; ///< Shared bpc for input-output operation
+
+ char *filter_string; ///< The complete user provided filter definition
+ CFTypeRef *filters; ///< CIFilter object for all requested filters
+ int num_filters; ///< Amount of filters in *filters
+
+ char *output_rect; ///< Rectangle to be filled with filter intput
+ int list_filters; ///< Option used to list all available filters including generators
+ int list_generators; ///< Option used to list all available generators
+} CoreImageContext;
+
+static int config_output(AVFilterLink *link)
+{
+ CoreImageContext *ctx = link->src->priv;
+
+ link->w = ctx->w;
+ link->h = ctx->h;
+ link->sample_aspect_ratio = ctx->sar;
+ link->frame_rate = ctx->frame_rate;
+ link->time_base = ctx->time_base;
+
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
+ ctx->bits_per_component = av_get_bits_per_pixel(desc) / desc->nb_components;
+
+ return 0;
+}
+
+/** Determine image properties from input link of filter chain.
+ */
+static int config_input(AVFilterLink *link)
+{
+ CoreImageContext *ctx = link->dst->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
+ ctx->bits_per_component = av_get_bits_per_pixel(desc) / desc->nb_components;
+
+ return 0;
+}
+
+/** Print a list of all available filters including options and respective value ranges and defaults.
+ */
+static void list_filters(CoreImageContext *ctx)
+{
+ // querying filters and attributes
+ NSArray *filter_categories = nil;
+
+ if (ctx->list_generators && !ctx->list_filters) {
+ filter_categories = [NSArray arrayWithObjects:kCICategoryGenerator, nil];
+ }
+
+ NSArray *filter_names = [CIFilter filterNamesInCategories:filter_categories];
+ NSEnumerator *filters = [filter_names objectEnumerator];
+
+ NSString *filter_name;
+ while (filter_name = [filters nextObject]) {
+ av_log(ctx, AV_LOG_INFO, "Filter: %s\n", [filter_name UTF8String]);
+ NSString *input;
+
+ CIFilter *filter = [CIFilter filterWithName:filter_name];
+ NSDictionary *filter_attribs = [filter attributes]; // <nsstring, id>
+ NSArray *filter_inputs = [filter inputKeys]; // <nsstring>
+
+ for (input in filter_inputs) {
+ NSDictionary *input_attribs = [filter_attribs valueForKey:input];
+ NSString *input_class = [input_attribs valueForKey:kCIAttributeClass];
+ if ([input_class isEqualToString:@"NSNumber"]) {
+ NSNumber *value_default = [input_attribs valueForKey:kCIAttributeDefault];
+ NSNumber *value_min = [input_attribs valueForKey:kCIAttributeSliderMin];
+ NSNumber *value_max = [input_attribs valueForKey:kCIAttributeSliderMax];
+
+ av_log(ctx, AV_LOG_INFO, "\tOption: %s\t[%s]\t[%s %s][%s]\n",
+ [input UTF8String],
+ [input_class UTF8String],
+ [[value_min stringValue] UTF8String],
+ [[value_max stringValue] UTF8String],
+ [[value_default stringValue] UTF8String]);
+ } else {
+ av_log(ctx, AV_LOG_INFO, "\tOption: %s\t[%s]\n",
+ [input UTF8String],
+ [input_class UTF8String]);
+ }
+ }
+ }
+}
+
+static int query_formats(AVFilterContext *fctx)
+{
+ static const enum AVPixelFormat inout_fmts_rgb[] = {
+ AV_PIX_FMT_ARGB,
+ AV_PIX_FMT_NONE
+ };
+
+ AVFilterFormats *inout_formats;
+ int ret;
+
+ if (!(inout_formats = ff_make_format_list(inout_fmts_rgb))) {
+ return AVERROR(ENOMEM);
+ }
+
+ if ((ret = ff_formats_ref(inout_formats, &fctx->inputs[0]->out_formats)) < 0 ||
+ (ret = ff_formats_ref(inout_formats, &fctx->outputs[0]->in_formats)) < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+static int query_formats_src(AVFilterContext *fctx)
+{
+ static const enum AVPixelFormat inout_fmts_rgb[] = {
+ AV_PIX_FMT_ARGB,
+ AV_PIX_FMT_NONE
+ };
+
+ AVFilterFormats *inout_formats;
+ int ret;
+
+ if (!(inout_formats = ff_make_format_list(inout_fmts_rgb))) {
+ return AVERROR(ENOMEM);
+ }
+
+ if ((ret = ff_formats_ref(inout_formats, &fctx->outputs[0]->in_formats)) < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+static int apply_filter(CoreImageContext *ctx, AVFilterLink *link, AVFrame *frame)
+{
+ int i;
+
+ // (re-)initialize input image
+ const CGSize frame_size = {
+ frame->width,
+ frame->height
+ };
+
+ NSData *data = [NSData dataWithBytesNoCopy:frame->data[0]
+ length:frame->height*frame->linesize[0]
+ freeWhenDone:NO];
+
+ CIImage *ret = [(__bridge CIImage*)ctx->input_image initWithBitmapData:data
+ bytesPerRow:frame->linesize[0]
+ size:frame_size
+ format:kCIFormatARGB8
+ colorSpace:ctx->color_space]; //kCGColorSpaceGenericRGB
+ if (!ret) {
+ av_log(ctx, AV_LOG_ERROR, "Input image could not be initialized.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ CIFilter *filter = NULL;
+ CIImage *filter_input = (__bridge CIImage*)ctx->input_image;
+ CIImage *filter_output = NULL;
+
+ // successively apply all filters
+ for (i = 0; i < ctx->num_filters; i++) {
+ if (i) {
+ // set filter input to previous filter output
+ filter_input = [(__bridge CIImage*)ctx->filters[i-1] valueForKey:kCIOutputImageKey];
+ CGRect out_rect = [filter_input extent];
+ if (out_rect.size.width > frame->width || out_rect.size.height > frame->height) {
+ // do not keep padded image regions after filtering
+ out_rect.origin.x = 0.0f;
+ out_rect.origin.y = 0.0f;
+ out_rect.size.width = frame->width;
+ out_rect.size.height = frame->height;
+ }
+ filter_input = [filter_input imageByCroppingToRect:out_rect];
+ }
+
+ filter = (__bridge CIFilter*)ctx->filters[i];
+
+ // do not set input image for the first filter if used as video source
+ if (!ctx->is_video_source || i) {
+ @try {
+ [filter setValue:filter_input forKey:kCIInputImageKey];
+ } @catch (NSException *exception) {
+ if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
+ av_log(ctx, AV_LOG_ERROR, "An error occurred: %s.", [exception.reason UTF8String]);
+ return AVERROR_EXTERNAL;
+ } else {
+ av_log(ctx, AV_LOG_WARNING, "Selected filter does not accept an input image.\n");
+ }
+ }
+ }
+ }
+
+ // get output of last filter
+ filter_output = [filter valueForKey:kCIOutputImageKey];
+
+ if (!filter_output) {
+ av_log(ctx, AV_LOG_ERROR, "Filter output not available.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ // do not keep padded image regions after filtering
+ CGRect out_rect = [filter_output extent];
+ if (out_rect.size.width > frame->width || out_rect.size.height > frame->height) {
+ av_log(ctx, AV_LOG_DEBUG, "Cropping output image.\n");
+ out_rect.origin.x = 0.0f;
+ out_rect.origin.y = 0.0f;
+ out_rect.size.width = frame->width;
+ out_rect.size.height = frame->height;
+ }
+
+ CGImageRef out = [(__bridge CIContext*)ctx->glctx createCGImage:filter_output
+ fromRect:out_rect];
+
+ if (!out) {
+ av_log(ctx, AV_LOG_ERROR, "Cannot create valid output image.\n");
+ }
+
+ // create bitmap context on the fly for rendering into current frame->data[]
+ if (ctx->cgctx) {
+ CGContextRelease(ctx->cgctx);
+ ctx->cgctx = NULL;
+ }
+ size_t out_width = CGImageGetWidth(out);
+ size_t out_height = CGImageGetHeight(out);
+
+ if (out_width > frame->width || out_height > frame->height) { // this might result in segfault
+ av_log(ctx, AV_LOG_WARNING, "Output image has unexpected size: %lux%lu (expected: %ix%i). This may crash...\n",
+ out_width, out_height, frame->width, frame->height);
+ }
+ ctx->cgctx = CGBitmapContextCreate(frame->data[0],
+ frame->width,
+ frame->height,
+ ctx->bits_per_component,
+ frame->linesize[0],
+ ctx->color_space,
+ (uint32_t)kCGImageAlphaPremultipliedFirst); // ARGB
+ if (!ctx->cgctx) {
+ av_log(ctx, AV_LOG_ERROR, "CGBitmap context cannot be created.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ // copy ("draw") the output image into the frame data
+ CGRect rect = {{0,0},{frame->width, frame->height}};
+ if (ctx->output_rect) {
+ @try {
+ NSString *tmp_string = [NSString stringWithUTF8String:ctx->output_rect];
+ NSRect tmp = NSRectFromString(tmp_string);
+ rect = NSRectToCGRect(tmp);
+ } @catch (NSException *exception) {
+ av_log(ctx, AV_LOG_ERROR, "An error occurred: %s.", [exception.reason UTF8String]);
+ return AVERROR_EXTERNAL;
+ }
+ if (rect.size.width == 0.0f) {
+ av_log(ctx, AV_LOG_WARNING, "Width of output rect is zero.\n");
+ }
+ if (rect.size.height == 0.0f) {
+ av_log(ctx, AV_LOG_WARNING, "Height of output rect is zero.\n");
+ }
+ }
+
+ CGContextDrawImage(ctx->cgctx, rect, out);
+
+ return ff_filter_frame(link, frame);
+}
+
+/** Apply all valid filters successively to the input image.
+ * The final output image is copied from the GPU by "drawing" using a bitmap context.
+ */
+static int filter_frame(AVFilterLink *link, AVFrame *frame)
+{
+ return apply_filter(link->dst->priv, link->dst->outputs[0], frame);
+}
+
+static int request_frame(AVFilterLink *link)
+{
+ CoreImageContext *ctx = link->src->priv;
+ AVFrame *frame;
+
+ if (ctx->duration >= 0 &&
+ av_rescale_q(ctx->pts, ctx->time_base, AV_TIME_BASE_Q) >= ctx->duration) {
+ return AVERROR_EOF;
+ }
+
+ if (!ctx->picref) {
+ ctx->picref = ff_get_video_buffer(link, ctx->w, ctx->h);
+ if (!ctx->picref) {
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ frame = av_frame_clone(ctx->picref);
+ if (!frame) {
+ return AVERROR(ENOMEM);
+ }
+
+ frame->pts = ctx->pts;
+ frame->key_frame = 1;
+ frame->interlaced_frame = 0;
+ frame->pict_type = AV_PICTURE_TYPE_I;
+ frame->sample_aspect_ratio = ctx->sar;
+
+ ctx->pts++;
+
+ return apply_filter(ctx, link, frame);
+}
+
+/** Set an option of the given filter to the provided key-value pair.
+ */
+static void set_option(CoreImageContext *ctx, CIFilter *filter, const char *key, const char *value)
+{
+ NSString *input_key = [NSString stringWithUTF8String:key];
+ NSString *input_val = [NSString stringWithUTF8String:value];
+
+ NSDictionary *filter_attribs = [filter attributes]; // <nsstring, id>
+ NSDictionary *input_attribs = [filter_attribs valueForKey:input_key];
+
+ NSString *input_class = [input_attribs valueForKey:kCIAttributeClass];
+ NSString *input_type = [input_attribs valueForKey:kCIAttributeType];
+
+ if (!input_attribs) {
+ av_log(ctx, AV_LOG_WARNING, "Skipping unknown option: \"%s\".\n",
+ [input_key UTF8String]); // [[filter name] UTF8String]) not currently defined...
+ return;
+ }
+
+ av_log(ctx, AV_LOG_DEBUG, "key: %s, val: %s, #attribs: %lu, class: %s, type: %s\n",
+ [input_key UTF8String],
+ [input_val UTF8String],
+ input_attribs ? (unsigned long)[input_attribs count] : -1,
+ [input_class UTF8String],
+ [input_type UTF8String]);
+
+ if ([input_class isEqualToString:@"NSNumber"]) {
+ float input = input_val.floatValue;
+ NSNumber *max_value = [input_attribs valueForKey:kCIAttributeSliderMax];
+ NSNumber *min_value = [input_attribs valueForKey:kCIAttributeSliderMin];
+ NSNumber *used_value = nil;
+
+#define CLAMP_WARNING do { \
+av_log(ctx, AV_LOG_WARNING, "Value of \"%f\" for option \"%s\" is out of range [%f %f], clamping to \"%f\".\n", \
+ input, \
+ [input_key UTF8String], \
+ min_value.floatValue, \
+ max_value.floatValue, \
+ used_value.floatValue); \
+} while(0)
+ if (input > max_value.floatValue) {
+ used_value = max_value;
+ CLAMP_WARNING;
+ } else if (input < min_value.floatValue) {
+ used_value = min_value;
+ CLAMP_WARNING;
+ } else {
+ used_value = [NSNumber numberWithFloat:input];
+ }
+
+ [filter setValue:used_value forKey:input_key];
+ } else if ([input_class isEqualToString:@"CIVector"]) {
+ CIVector *input = [CIVector vectorWithString:input_val];
+
+ if (!input) {
+ av_log(ctx, AV_LOG_WARNING, "Skipping invalid CIVctor description: \"%s\".\n",
+ [input_val UTF8String]);
+ return;
+ }
+
+ [filter setValue:input forKey:input_key];
+ } else if ([input_class isEqualToString:@"CIColor"]) {
+ CIColor *input = [CIColor colorWithString:input_val];
+
+ if (!input) {
+ av_log(ctx, AV_LOG_WARNING, "Skipping invalid CIColor description: \"%s\".\n",
+ [input_val UTF8String]);
+ return;
+ }
+
+ [filter setValue:input forKey:input_key];
+ } else if ([input_class isEqualToString:@"NSString"]) { // set display name as string with latin1 encoding
+ [filter setValue:input_val forKey:input_key];
+ } else if ([input_class isEqualToString:@"NSData"]) { // set display name as string with latin1 encoding
+ NSData *input = [NSData dataWithBytes:(const void*)[input_val cStringUsingEncoding:NSISOLatin1StringEncoding]
+ length:[input_val lengthOfBytesUsingEncoding:NSISOLatin1StringEncoding]];
+
+ if (!input) {
+ av_log(ctx, AV_LOG_WARNING, "Skipping invalid NSData description: \"%s\".\n",
+ [input_val UTF8String]);
+ return;
+ }
+
+ [filter setValue:input forKey:input_key];
+ } else {
+ av_log(ctx, AV_LOG_WARNING, "Skipping unsupported option class: \"%s\".\n",
+ [input_class UTF8String]);
+ avpriv_report_missing_feature(ctx, "Handling of some option classes");
+ return;
+ }
+}
+
+/** Create a filter object by a given name and set all options to defaults.
+ * Overwrite any option given by the user to the provided value in filter_options.
+ */
+static CIFilter* create_filter(CoreImageContext *ctx, const char *filter_name, AVDictionary *filter_options)
+{
+ // create filter object
+ CIFilter *filter = [CIFilter filterWithName:[NSString stringWithUTF8String:filter_name]];
+
+ // set default options
+ [filter setDefaults];
+
+ // set user options
+ if (filter_options) {
+ AVDictionaryEntry *o = NULL;
+ while ((o = av_dict_get(filter_options, "", o, AV_DICT_IGNORE_SUFFIX))) {
+ set_option(ctx, filter, o->key, o->value);
+ }
+ }
+
+ return filter;
+}
+
+static av_cold int init(AVFilterContext *fctx)
+{
+ CoreImageContext *ctx = fctx->priv;
+ AVDictionary *filter_dict = NULL;
+ AVDictionaryEntry *f = NULL;
+ AVDictionaryEntry *o = NULL;
+ int ret;
+ int i;
+
+ if (ctx->list_filters || ctx->list_generators) {
+ list_filters(ctx);
+ return AVERROR_EXIT;
+ }
+
+ if (ctx->filter_string) {
+ // parse filter string (filter=name at opt=val at opt2=val2#name2 at opt3=val3) for filters separated by #
+ av_log(ctx, AV_LOG_DEBUG, "Filter_string: %s\n", ctx->filter_string);
+ ret = av_dict_parse_string(&filter_dict, ctx->filter_string, "@", "#", AV_DICT_MULTIKEY); // parse filter_name:all_filter_options
+ if (ret) {
+ av_log(ctx, AV_LOG_ERROR, "Parsing of filters failed.\n");
+ return AVERROR(EIO);
+ }
+ ctx->num_filters = av_dict_count(filter_dict);
+ av_log(ctx, AV_LOG_DEBUG, "Filter count: %i\n", ctx->num_filters);
+
+ // allocate CIFilter array
+ ctx->filters = av_mallocz_array(ctx->num_filters, sizeof(CIFilter*));
+ if (!ctx->filters) {
+ av_log(ctx, AV_LOG_ERROR, "Could not allocate filter array.\n");
+ return AVERROR(ENOMEM);
+ }
+
+ // parse filters for option key-value pairs (opt=val at opt2=val2) separated by @
+ i = 0;
+ while ((f = av_dict_get(filter_dict, "", f, AV_DICT_IGNORE_SUFFIX))) {
+ AVDictionary *filter_options = NULL;
+
+ if (strncmp(f->value, "default", 7)) { // not default
+ ret = av_dict_parse_string(&filter_options, f->value, "=", "@", 0); // parse option_name:option_value
+ if (ret) {
+ av_log(ctx, AV_LOG_ERROR, "Parsing of filter options for \"%s\" failed.\n", f->key);
+ return AVERROR(EIO);
+ }
+ }
+
+ if (av_log_get_level() >= AV_LOG_DEBUG) {
+ av_log(ctx, AV_LOG_DEBUG, "Creating filter %i: \"%s\":\n", i, f->key);
+ if (!filter_options) {
+ av_log(ctx, AV_LOG_DEBUG, "\tusing default options\n");
+ } else {
+ while ((o = av_dict_get(filter_options, "", o, AV_DICT_IGNORE_SUFFIX))) {
+ av_log(ctx, AV_LOG_DEBUG, "\t%s: %s\n", o->key, o->value);
+ }
+ }
+ }
+
+ ctx->filters[i] = CFBridgingRetain(create_filter(ctx, f->key, filter_options));
+ if (!ctx->filters[i]) {
+ av_log(ctx, AV_LOG_ERROR, "Could not create filter \"%s\".\n", f->key);
+ return AVERROR(EINVAL);
+ }
+
+ i++;
+ }
+ } else {
+ av_log(ctx, AV_LOG_ERROR, "No filters specified.\n");
+ return AVERROR(EINVAL);
+ }
+
+ // create GPU context on OSX
+ const NSOpenGLPixelFormatAttribute attr[] = {
+ NSOpenGLPFAAccelerated,
+ NSOpenGLPFANoRecovery,
+ NSOpenGLPFAColorSize, 32,
+ 0
+ };
+
+ NSOpenGLPixelFormat *pixel_format = [[NSOpenGLPixelFormat alloc] initWithAttributes:(void *)&attr];
+ ctx->color_space = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
+ ctx->glctx = CFBridgingRetain([CIContext contextWithCGLContext:CGLGetCurrentContext()
+ pixelFormat:[pixel_format CGLPixelFormatObj]
+ colorSpace:ctx->color_space
+ options:nil]);
+
+ if (!ctx->glctx) {
+ av_log(ctx, AV_LOG_ERROR, "CIContext not created.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ // Creating an empty input image as input container for the context
+ ctx->input_image = CFBridgingRetain([CIImage emptyImage]);
+
+ return 0;
+}
+
+static av_cold int init_src(AVFilterContext *fctx)
+{
+ CoreImageContext *ctx = fctx->priv;
+
+ ctx->is_video_source = 1;
+ ctx->time_base = av_inv_q(ctx->frame_rate);
+ ctx->pts = 0;
+
+ return init(fctx);
+}
+
+static av_cold void uninit(AVFilterContext *fctx)
+{
+#define SafeCFRelease(ptr) do { \
+ if (ptr) { \
+ CFRelease(ptr); \
+ ptr = NULL; \
+ } \
+} while (0)
+
+ CoreImageContext *ctx = fctx->priv;
+
+ SafeCFRelease(ctx->glctx);
+ SafeCFRelease(ctx->cgctx);
+ SafeCFRelease(ctx->color_space);
+ SafeCFRelease(ctx->input_image);
+
+ if (ctx->filters) {
+ for (int i = 0; i < ctx->num_filters; i++) {
+ SafeCFRelease(ctx->filters[i]);
+ }
+ av_freep(&ctx->filters);
+ }
+
+ av_frame_free(&ctx->picref);
+}
+
+static const AVFilterPad vf_coreimage_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad vf_coreimage_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+static const AVFilterPad vsrc_coreimagesrc_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .request_frame = request_frame,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+#define OFFSET(x) offsetof(CoreImageContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+#define GENERATOR_OPTIONS \
+ {"size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0, FLAGS}, \
+ {"s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0, FLAGS}, \
+ {"rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS}, \
+ {"r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS}, \
+ {"duration", "set video duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS}, \
+ {"d", "set video duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS}, \
+ {"sar", "set video sample aspect ratio", OFFSET(sar), AV_OPT_TYPE_RATIONAL, {.dbl = 1}, 0, INT_MAX, FLAGS},
+
+#define FILTER_OPTIONS \
+ {"list_filters", "list available filters", OFFSET(list_filters), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, .flags = FLAGS}, \
+ {"list_generators", "list available generators", OFFSET(list_generators), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, .flags = FLAGS}, \
+ {"filter", "names and options of filters to apply", OFFSET(filter_string), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS}, \
+ {"output_rect", "output rectangle within output image", OFFSET(output_rect), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS},
+
+
+// definitions for coreimage video filter
+static const AVOption coreimage_options[] = {
+ FILTER_OPTIONS
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(coreimage);
+
+AVFilter ff_vf_coreimage = {
+ .name = "coreimage",
+ .description = NULL_IF_CONFIG_SMALL("Video filtering using CoreImage API."),
+ .init = init,
+ .uninit = uninit,
+ .priv_size = sizeof(CoreImageContext),
+ .priv_class = &coreimage_class,
+ .inputs = vf_coreimage_inputs,
+ .outputs = vf_coreimage_outputs,
+ .query_formats = query_formats,
+};
+
+// definitions for coreimagesrc video source
+static const AVOption coreimagesrc_options[] = {
+ GENERATOR_OPTIONS
+ FILTER_OPTIONS
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(coreimagesrc);
+
+AVFilter ff_vsrc_coreimagesrc = {
+ .name = "coreimagesrc",
+ .description = NULL_IF_CONFIG_SMALL("Video source using image generators of CoreImage API."),
+ .init = init_src,
+ .uninit = uninit,
+ .priv_size = sizeof(CoreImageContext),
+ .priv_class = &coreimagesrc_class,
+ .inputs = NULL,
+ .outputs = vsrc_coreimagesrc_outputs,
+ .query_formats = query_formats_src,
+};
--
1.8.3.2
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