[FFmpeg-devel] [PATCH 6/8] lavfi: add a Vulkan chromatic aberration filter

Rostislav Pehlivanov atomnuker at gmail.com
Fri Apr 20 07:30:08 EEST 2018


It tries to do something similar to it with YUV images, but RGB images
are done properly.

Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>
---
 configure                                   |   1 +
 libavfilter/Makefile                        |   1 +
 libavfilter/allfilters.c                    |   1 +
 libavfilter/vf_chromaticaberration_vulkan.c | 342 ++++++++++++++++++++
 4 files changed, 345 insertions(+)
 create mode 100644 libavfilter/vf_chromaticaberration_vulkan.c

diff --git a/configure b/configure
index 99128d74dc..b93bf0b00f 100755
--- a/configure
+++ b/configure
@@ -3304,6 +3304,7 @@ azmq_filter_deps="libzmq"
 blackframe_filter_deps="gpl"
 boxblur_filter_deps="gpl"
 bs2b_filter_deps="libbs2b"
+chromaticabberation_vulkan_filter_deps="vulkan libshaderc"
 colormatrix_filter_deps="gpl"
 convolution_opencl_filter_deps="opencl"
 convolve_filter_deps="avcodec"
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 915c4009af..b4c10daed6 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -153,6 +153,7 @@ OBJS-$(CONFIG_BLEND_FILTER)                  += vf_blend.o framesync.o
 OBJS-$(CONFIG_BOXBLUR_FILTER)                += vf_boxblur.o
 OBJS-$(CONFIG_BWDIF_FILTER)                  += vf_bwdif.o
 OBJS-$(CONFIG_CHROMAKEY_FILTER)              += vf_chromakey.o
+OBJS-$(CONFIG_CHROMATICABERRATION_VULKAN_FILTER) += vf_chromaticaberration_vulkan.o vulkan.o
 OBJS-$(CONFIG_CIESCOPE_FILTER)               += vf_ciescope.o
 OBJS-$(CONFIG_CODECVIEW_FILTER)              += vf_codecview.o
 OBJS-$(CONFIG_COLORBALANCE_FILTER)           += vf_colorbalance.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 65f1628249..a4b59f43ac 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -146,6 +146,7 @@ extern AVFilter ff_vf_blend;
 extern AVFilter ff_vf_boxblur;
 extern AVFilter ff_vf_bwdif;
 extern AVFilter ff_vf_chromakey;
+extern AVFilter ff_vf_chromaticaberration_vulkan;
 extern AVFilter ff_vf_ciescope;
 extern AVFilter ff_vf_codecview;
 extern AVFilter ff_vf_colorbalance;
diff --git a/libavfilter/vf_chromaticaberration_vulkan.c b/libavfilter/vf_chromaticaberration_vulkan.c
new file mode 100644
index 0000000000..e814d2442b
--- /dev/null
+++ b/libavfilter/vf_chromaticaberration_vulkan.c
@@ -0,0 +1,342 @@
+/*
+ * 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 "vulkan.h"
+#include "internal.h"
+
+typedef struct ChromaticAberrationVulkanContext {
+    VulkanFilterContext vkctx;
+
+    int initialized;
+    FFVkExecContext exec;
+
+    /* Shader updators, must be in the main filter struct */
+    VkDescriptorImageInfo input_images[3];
+    VkDescriptorImageInfo output_images[3];
+
+    float dist_x;
+    float dist_y;
+} ChromaticAberrationVulkanContext;
+
+static const char distort_chroma_kernel[] = {
+    C(0, void distort_rgb(ivec2 size, ivec2 pos)                               )
+    C(0, {                                                                     )
+    C(1,     const vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f;              )
+    C(1,     const vec2 o = p * (FILTER_DIST - 1.0f);                          )
+    C(0,                                                                       )
+    C(1,     vec4 res;                                                         )
+    C(1,     res.r = texture(input_img[0], ((p - o)/2.0f) + 0.5f).r;           )
+    C(1,     res.g = texture(input_img[0], ((    p)/2.0f) + 0.5f).g;           )
+    C(1,     res.b = texture(input_img[0], ((p + o)/2.0f) + 0.5f).b;           )
+    C(1,     res.a = texture(input_img[0], ((    p)/2.0f) + 0.5f).a;           )
+    C(1,     imageStore(output_img[0], pos, res);                              )
+    C(0, }                                                                     )
+    C(0,                                                                       )
+    C(0, void distort_chroma(int idx, ivec2 size, ivec2 pos)                   )
+    C(0, {                                                                     )
+    C(1,     vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f;                    )
+    C(1,     float d = sqrt(p.x*p.x + p.y*p.y);                                )
+    C(1,     p *= d / (d*FILTER_DIST);                                         )
+    C(1,     vec4 res = texture(input_img[idx], (p/2.0f) + 0.5f);              )
+    C(1,     imageStore(output_img[idx], pos, res);                            )
+    C(0, }                                                                     )
+};
+
+static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
+{
+    int err;
+    ChromaticAberrationVulkanContext *s = ctx->priv;
+
+    /* Create a sampler */
+    const VulkanSampler *sampler = ff_vk_init_sampler(ctx, NULL, 0,
+                                                      VK_FILTER_LINEAR);
+    if (!sampler)
+        return AVERROR_EXTERNAL;
+
+    { /* Create the shader */
+        const float dist_x = (s->dist_x / 100.0f) + 1.0f;
+        const float dist_y = (s->dist_y / 100.0f) + 1.0f;
+        const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
+
+        SPIRVShader *shd = ff_vk_init_shader(ctx, "chromaticaberration_compute",
+                                             VK_SHADER_STAGE_COMPUTE_BIT);
+        ff_vk_set_compute_shader_sizes(ctx, shd, (int [3]){ 16, 16, 1 });
+
+        VulkanDescriptorSetBinding desc_i[2] = {
+            {
+                .name       = "input_img",
+                .type       = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
+                .dimensions = 2,
+                .elems      = planes,
+                .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
+                .updater    = s->input_images,
+                .samplers   = DUP_SAMPLER_ARRAY4(sampler->sampler),
+            },
+            {
+                .name       = "output_img",
+                .type       = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
+                .mem_layout = "rgba8",
+                .mem_quali  = "writeonly",
+                .dimensions = 2,
+                .elems      = planes,
+                .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
+                .updater    = s->output_images,
+            },
+        };
+
+        RET(ff_vk_add_descriptor_set(ctx, shd, desc_i, 2, 0)); /* set 0 */
+
+        GLSLF(0, #define FILTER_DIST vec2(%f, %f)              ,dist_x, dist_y);
+        GLSLD(   distort_chroma_kernel                                        );
+        GLSLC(0, void main()                                                  );
+        GLSLC(0, {                                                            );
+        GLSLC(1,     ivec2 pos = ivec2(gl_GlobalInvocationID.xy);             );
+        GLSLF(1,     int planes = %i;                                  ,planes);
+        GLSLC(1,     for (int i = 0; i < planes; i++) {                       );
+        GLSLC(2,         ivec2 size = imageSize(output_img[i]);               );
+        GLSLC(2,         if (!IS_WITHIN(pos, size))                           );
+        GLSLC(3,             continue;                                        );
+        GLSLC(2,         if (planes == 1) {                                   );
+        GLSLC(3,             distort_rgb(size, pos);                          );
+        GLSLC(2,         } else if (i > 0) {                                  );
+        GLSLC(3,             distort_chroma(i, size, pos);                    );
+        GLSLC(2,         } else {                                             );
+        GLSLC(3,             vec2 npos = vec2(pos)/vec2(size);                );
+        GLSLC(3,             vec4 res = texture(input_img[i], npos);          );
+        GLSLC(3,             imageStore(output_img[i], pos, res);             );
+        GLSLC(2,         }                                                    );
+        GLSLC(1,     }                                                        );
+        GLSLC(0, }                                                            );
+
+        RET(ff_vk_compile_shader(ctx, shd, "main"));
+    }
+
+    RET(ff_vk_init_pipeline_layout(ctx));
+
+    /* Execution context */
+    RET(ff_vk_create_exec_ctx(ctx, &s->exec,
+                              s->vkctx.hwctx->queue_family_comp_index));
+
+    /* The pipeline */
+    RET(ff_vk_init_compute_pipeline(ctx));
+
+    s->initialized = 1;
+
+    return 0;
+
+fail:
+    return err;
+}
+
+static int process_frames(AVFilterContext *avctx, AVVkFrame *out, AVVkFrame *in)
+{
+    int err;
+    ChromaticAberrationVulkanContext *s = avctx->priv;
+    int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
+
+    VkCommandBufferBeginInfo cmd_start = {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
+        .flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT,
+    };
+
+    VkComponentMapping null_map = {
+        .r = VK_COMPONENT_SWIZZLE_IDENTITY,
+        .g = VK_COMPONENT_SWIZZLE_IDENTITY,
+        .b = VK_COMPONENT_SWIZZLE_IDENTITY,
+        .a = VK_COMPONENT_SWIZZLE_IDENTITY,
+    };
+
+    for (int i = 0; i < planes; i++) {
+        RET(ff_vk_create_imageview(avctx, &s->input_images[i].imageView, in,
+                                   ff_vk_plane_rep_fmt(s->vkctx.input_format, i),
+                                   ff_vk_aspect_flags(s->vkctx.input_format, i),
+                                   null_map, NULL));
+
+        RET(ff_vk_create_imageview(avctx, &s->output_images[i].imageView, out,
+                                   ff_vk_plane_rep_fmt(s->vkctx.output_format, i),
+                                   ff_vk_aspect_flags(s->vkctx.output_format, i),
+                                   null_map, NULL));
+
+        s->input_images[i].imageLayout  = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
+        s->output_images[i].imageLayout = VK_IMAGE_LAYOUT_GENERAL;
+    }
+
+    ff_vk_update_descriptor_set(avctx, 0);
+
+    vkBeginCommandBuffer(s->exec.buf, &cmd_start);
+
+    {
+        VkImageMemoryBarrier bar[2] = {
+            {
+                .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
+                .srcAccessMask = 0,
+                .dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
+                .oldLayout = in->layout,
+                .newLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
+                .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
+                .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
+                .image = in->img,
+                .subresourceRange.aspectMask = ff_vk_aspect_flags(s->vkctx.input_format, -1),
+                .subresourceRange.levelCount = 1,
+                .subresourceRange.layerCount = 1,
+            },
+            {
+                .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
+                .srcAccessMask = 0,
+                .dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
+                .oldLayout = out->layout,
+                .newLayout = VK_IMAGE_LAYOUT_GENERAL,
+                .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
+                .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
+                .image = out->img,
+                .subresourceRange.aspectMask = ff_vk_aspect_flags(s->vkctx.input_format, -1),
+                .subresourceRange.levelCount = 1,
+                .subresourceRange.layerCount = 1,
+            },
+        };
+
+        vkCmdPipelineBarrier(s->exec.buf, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
+                            VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, 0,
+                            0, NULL, 0, NULL, 2, bar);
+
+        in->layout = bar[0].newLayout;
+        in->access = bar[0].dstAccessMask;
+
+        out->layout = bar[1].newLayout;
+        out->access = bar[1].dstAccessMask;
+    }
+
+    vkCmdBindPipeline(s->exec.buf, VK_PIPELINE_BIND_POINT_COMPUTE, s->vkctx.pipeline);
+    vkCmdBindDescriptorSets(s->exec.buf, VK_PIPELINE_BIND_POINT_COMPUTE, s->vkctx.pipeline_layout, 0, s->vkctx.descriptor_sets_num, s->vkctx.desc_set, 0, 0);
+    vkCmdDispatch(s->exec.buf,
+                  FFALIGN(s->vkctx.output_width,  s->vkctx.shaders[0].local_size[0])/s->vkctx.shaders[0].local_size[0],
+                  FFALIGN(s->vkctx.output_height, s->vkctx.shaders[0].local_size[1])/s->vkctx.shaders[0].local_size[1], 1);
+
+    vkEndCommandBuffer(s->exec.buf);
+
+    VkSubmitInfo s_info = {
+        .sType                = VK_STRUCTURE_TYPE_SUBMIT_INFO,
+        .commandBufferCount   = 1,
+        .pCommandBuffers      = &s->exec.buf,
+    };
+
+    VkResult ret = vkQueueSubmit(s->exec.queue, 1, &s_info, s->exec.fence);
+    if (ret != VK_SUCCESS) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to submit command buffer: %s\n",
+               ff_vk_ret2str(ret));
+        return AVERROR_EXTERNAL;
+    } else {
+        vkWaitForFences(s->vkctx.hwctx->act_dev, 1, &s->exec.fence, VK_TRUE, UINT64_MAX);
+        vkResetFences(s->vkctx.hwctx->act_dev, 1, &s->exec.fence);
+    }
+
+fail:
+
+    for (int i = 0; i < planes; i++) {
+        ff_vk_destroy_imageview(avctx, s->input_images[i].imageView);
+        ff_vk_destroy_imageview(avctx, s->output_images[i].imageView);
+    }
+
+    return err;
+}
+
+static int chromaticaberration_vulkan_filter_frame(AVFilterLink *link, AVFrame *in)
+{
+    int err;
+    AVFilterContext *ctx = link->dst;
+    ChromaticAberrationVulkanContext *s = ctx->priv;
+    AVFilterLink *outlink = ctx->outputs[0];
+
+    AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+    if (!out) {
+        err = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    if (!s->initialized)
+        RET(init_filter(ctx, in));
+
+    RET(process_frames(ctx, (AVVkFrame *)out->data[0],
+                            (AVVkFrame *) in->data[0]));
+
+    err = av_frame_copy_props(out, in);
+    if (err < 0)
+        goto fail;
+
+    av_frame_free(&in);
+
+    return ff_filter_frame(outlink, out);
+
+fail:
+    av_frame_free(&in);
+    av_frame_free(&out);
+    return err;
+}
+
+static void chromaticaberration_vulkan_uninit(AVFilterContext *avctx)
+{
+    ChromaticAberrationVulkanContext *s = avctx->priv;
+
+    ff_vk_free_exec_ctx(avctx, &s->exec);
+    ff_vk_filter_uninit(avctx);
+
+    s->initialized = 0;
+}
+
+#define OFFSET(x) offsetof(ChromaticAberrationVulkanContext, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
+static const AVOption chromaticaberration_vulkan_options[] = {
+    { "dist_x", "Set horizontal distortion amount", OFFSET(dist_x), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, 0.0f, 10.0f, .flags = FLAGS },
+    { "dist_y", "Set vertical distortion amount",   OFFSET(dist_y), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, 0.0f, 10.0f, .flags = FLAGS },
+    { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(chromaticaberration_vulkan);
+
+static const AVFilterPad chromaticaberration_vulkan_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = &chromaticaberration_vulkan_filter_frame,
+        .config_props = &ff_vk_filter_config_input,
+    },
+    { NULL }
+};
+
+static const AVFilterPad chromaticaberration_vulkan_outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_VIDEO,
+        .config_props = &ff_vk_filter_config_output,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_chromaticaberration_vulkan = {
+    .name           = "chromaticaberration_vulkan",
+    .description    = NULL_IF_CONFIG_SMALL("Offset chroma of input video"),
+    .priv_size      = sizeof(ChromaticAberrationVulkanContext),
+    .init           = &ff_vk_filter_init,
+    .uninit         = &chromaticaberration_vulkan_uninit,
+    .query_formats  = &ff_vk_filter_query_formats,
+    .inputs         = chromaticaberration_vulkan_inputs,
+    .outputs        = chromaticaberration_vulkan_outputs,
+    .priv_class     = &chromaticaberration_vulkan_class,
+    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
-- 
2.17.0



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