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   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "libavutil/opt.h"
  20 #include "vulkan.h"
  21 #include "internal.h"
  22
  23 #define CGROUPS (int [3]){ 32, 32, 1 }
  24
  25 typedef struct ChromaticAberrationVulkanContext {
  26     VulkanFilterContext vkctx;
  27
  28     int initialized;
  29     FFVkExecContext *exec;
  30     VulkanPipeline *pl;
  31
  32     /* Shader updators, must be in the main filter struct */
  33     VkDescriptorImageInfo input_images[3];
  34     VkDescriptorImageInfo output_images[3];
  35
  36     /* Push constants / options */
  37     struct {
  38         float dist[2];
  39     } opts;
  40 } ChromaticAberrationVulkanContext;
  41
  42 static const char distort_chroma_kernel[] = {
  43     C(0, void distort_rgb(ivec2 size, ivec2 pos)                               )
  44     C(0, {                                                                     )
  45     C(1,     const vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f;              )
  46     C(1,     const vec2 o = p * (dist - 1.0f);                                 )
  47     C(0,                                                                       )
  48     C(1,     vec4 res;                                                         )
  49     C(1,     res.r = texture(input_img[0], ((p - o)/2.0f) + 0.5f).r;           )
  50     C(1,     res.g = texture(input_img[0], ((p    )/2.0f) + 0.5f).g;           )
  51     C(1,     res.b = texture(input_img[0], ((p + o)/2.0f) + 0.5f).b;           )
  52     C(1,     res.a = texture(input_img[0], ((p    )/2.0f) + 0.5f).a;           )
  53     C(1,     imageStore(output_img[0], pos, res);                              )
  54     C(0, }                                                                     )
  55     C(0,                                                                       )
  56     C(0, void distort_chroma(int idx, ivec2 size, ivec2 pos)                   )
  57     C(0, {                                                                     )
  58     C(1,     vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f;                    )
  59     C(1,     float d = sqrt(p.x*p.x + p.y*p.y);                                )
  60     C(1,     p *= d / (d*     dist);                                           )
  61     C(1,     vec4 res = texture(input_img[idx], (p/2.0f) + 0.5f);              )
  62     C(1,     imageStore(output_img[idx], pos, res);                            )
  63     C(0, }                                                                     )
  64 };
  65
  66 static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
  67 {
  68     int err;
  69     ChromaticAberrationVulkanContext *s = ctx->priv;
  70
  71     /* Create a sampler */
  72     VkSampler *sampler = ff_vk_init_sampler(ctx, 0, VK_FILTER_LINEAR);
  73     if (!sampler)
  74         return AVERROR_EXTERNAL;
  75
  76     s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
  77     s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
  78     s->vkctx.cur_queue_idx = rand() % s->vkctx.queue_count;
  79
  80     s->pl = ff_vk_create_pipeline(ctx);
  81     if (!s->pl)
  82         return AVERROR(ENOMEM);
  83
  84     /* Normalize options */
  85     s->opts.dist[0] = (s->opts.dist[0] / 100.0f) + 1.0f;
  86     s->opts.dist[1] = (s->opts.dist[1] / 100.0f) + 1.0f;
  87
  88     { /* Create the shader */
  89         const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
  90         VulkanDescriptorSetBinding desc_i[2] = {
  91             {
  92                 .name       = "input_img",
  93                 .type       = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
  94                 .dimensions = 2,
  95                 .elems      = planes,
  96                 .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
  97                 .updater    = s->input_images,
  98                 .samplers   = DUP_SAMPLER_ARRAY4(*sampler),
  99             },
 100             {
 101                 .name       = "output_img",
 102                 .type       = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
 103                 .mem_layout = ff_vk_shader_rep_fmt(s->vkctx.output_format),
 104                 .mem_quali  = "writeonly",
 105                 .dimensions = 2,
 106                 .elems      = planes,
 107                 .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
 108                 .updater    = s->output_images,
 109             },
 110         };
 111
 112         SPIRVShader *shd = ff_vk_init_shader(ctx, s->pl, "chromaber_compute",
 113                                              VK_SHADER_STAGE_COMPUTE_BIT);
 114         if (!shd)
 115             return AVERROR(ENOMEM);
 116
 117         ff_vk_set_compute_shader_sizes(ctx, shd, CGROUPS);
 118
 119         GLSLC(0, layout(push_constant, std430) uniform pushConstants {        );
 120         GLSLC(1,    vec2 dist;                                                );
 121         GLSLC(0, };                                                           );
 122         GLSLC(0,                                                              );
 123
 124         ff_vk_add_push_constant(ctx, s->pl, 0, sizeof(s->opts),
 125                                 VK_SHADER_STAGE_COMPUTE_BIT);
 126
 127         RET(ff_vk_add_descriptor_set(ctx, s->pl, shd, desc_i, 2, 0)); /* set 0 */
 128
 129         GLSLD(   distort_chroma_kernel                                        );
 130         GLSLC(0, void main()                                                  );
 131         GLSLC(0, {                                                            );
 132         GLSLC(1,     ivec2 pos = ivec2(gl_GlobalInvocationID.xy);             );
 133         if (planes == 1) {
 134             GLSLC(1, distort_rgb(imageSize(output_img[0]), pos);              );
 135         } else {
 136             GLSLC(1, ivec2 size = imageSize(output_img[0]);                   );
 137             GLSLC(1, vec2 npos = vec2(pos)/vec2(size);                        );
 138             GLSLC(1, vec4 res = texture(input_img[0], npos);                  );
 139             GLSLC(1, imageStore(output_img[0], pos, res);                     );
 140             for (int i = 1; i < planes; i++) {
 141                 GLSLC(0,                                                      );
 142                 GLSLF(1,  size = imageSize(output_img[%i]);                 ,i);
 143                 GLSLC(1,  if (IS_WITHIN(pos, size)) {                         );
 144                 GLSLF(2,      distort_chroma(%i, size, pos);                ,i);
 145                 GLSLC(1,  } else {                                            );
 146                 GLSLC(2,    npos = vec2(pos)/vec2(size);                      );
 147                 GLSLF(2,    res = texture(input_img[%i], npos);             ,i);
 148                 GLSLF(2,    imageStore(output_img[%i], pos, res);           ,i);
 149                 GLSLC(1, }                                                    );
 150             }
 151         }
 152         GLSLC(0, }                                                            );
 153
 154         RET(ff_vk_compile_shader(ctx, shd, "main"));
 155     }
 156
 157     RET(ff_vk_init_pipeline_layout(ctx, s->pl));
 158     RET(ff_vk_init_compute_pipeline(ctx, s->pl));
 159
 160     /* Execution context */
 161     RET(ff_vk_create_exec_ctx(ctx, &s->exec));
 162
 163     s->initialized = 1;
 164
 165     return 0;
 166
 167 fail:
 168     return err;
 169 }
 170
 171 static int process_frames(AVFilterContext *avctx, AVFrame *out_f, AVFrame *in_f)
 172 {
 173     int err = 0;
 174     VkCommandBuffer cmd_buf;
 175     ChromaticAberrationVulkanContext *s = avctx->priv;
 176     AVVkFrame *in = (AVVkFrame *)in_f->data[0];
 177     AVVkFrame *out = (AVVkFrame *)out_f->data[0];
 178     int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
 179
 180     /* Update descriptors and init the exec context */
 181     ff_vk_start_exec_recording(avctx, s->exec);
 182     cmd_buf = ff_vk_get_exec_buf(avctx, s->exec);
 183
 184     for (int i = 0; i < planes; i++) {
 185         RET(ff_vk_create_imageview(avctx, s->exec, &s->input_images[i].imageView,
 186                                    in->img[i],
 187                                    av_vkfmt_from_pixfmt(s->vkctx.input_format)[i],
 188                                    ff_comp_identity_map));
 189
 190         RET(ff_vk_create_imageview(avctx, s->exec, &s->output_images[i].imageView,
 191                                    out->img[i],
 192                                    av_vkfmt_from_pixfmt(s->vkctx.output_format)[i],
 193                                    ff_comp_identity_map));
 194
 195         s->input_images[i].imageLayout  = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
 196         s->output_images[i].imageLayout = VK_IMAGE_LAYOUT_GENERAL;
 197     }
 198
 199     ff_vk_update_descriptor_set(avctx, s->pl, 0);
 200
 201     for (int i = 0; i < planes; i++) {
 202         VkImageMemoryBarrier bar[2] = {
 203             {
 204                 .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
 205                 .srcAccessMask = 0,
 206                 .dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
 207                 .oldLayout = in->layout[i],
 208                 .newLayout = s->input_images[i].imageLayout,
 209                 .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
 210                 .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
 211                 .image = in->img[i],
 212                 .subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
 213                 .subresourceRange.levelCount = 1,
 214                 .subresourceRange.layerCount = 1,
 215             },
 216             {
 217                 .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
 218                 .srcAccessMask = 0,
 219                 .dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
 220                 .oldLayout = out->layout[i],
 221                 .newLayout = s->output_images[i].imageLayout,
 222                 .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
 223                 .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
 224                 .image = out->img[i],
 225                 .subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
 226                 .subresourceRange.levelCount = 1,
 227                 .subresourceRange.layerCount = 1,
 228             },
 229         };
 230
 231         vkCmdPipelineBarrier(cmd_buf, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
 232                              VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, 0,
 233                              0, NULL, 0, NULL, FF_ARRAY_ELEMS(bar), bar);
 234
 235         in->layout[i]  = bar[0].newLayout;
 236         in->access[i]  = bar[0].dstAccessMask;
 237
 238         out->layout[i] = bar[1].newLayout;
 239         out->access[i] = bar[1].dstAccessMask;
 240     }
 241
 242     ff_vk_bind_pipeline_exec(avctx, s->exec, s->pl);
 243
 244     ff_vk_update_push_exec(avctx, s->exec, VK_SHADER_STAGE_COMPUTE_BIT,
 245                            0, sizeof(s->opts), &s->opts);
 246
 247     vkCmdDispatch(cmd_buf,
 248                   FFALIGN(s->vkctx.output_width,  CGROUPS[0])/CGROUPS[0],
 249                   FFALIGN(s->vkctx.output_height, CGROUPS[1])/CGROUPS[1], 1);
 250
 251     ff_vk_add_exec_dep(avctx, s->exec, in_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
 252     ff_vk_add_exec_dep(avctx, s->exec, out_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
 253
 254     err = ff_vk_submit_exec_queue(avctx, s->exec);
 255     if (err)
 256         return err;
 257
 258     return err;
 259
 260 fail:
 261     ff_vk_discard_exec_deps(avctx, s->exec);
 262     return err;
 263 }
 264
 265 static int chromaber_vulkan_filter_frame(AVFilterLink *link, AVFrame *in)
 266 {
 267     int err;
 268     AVFilterContext *ctx = link->dst;
 269     ChromaticAberrationVulkanContext *s = ctx->priv;
 270     AVFilterLink *outlink = ctx->outputs[0];
 271
 272     AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 273     if (!out) {
 274         err = AVERROR(ENOMEM);
 275         goto fail;
 276     }
 277
 278     if (!s->initialized)
 279         RET(init_filter(ctx, in));
 280
 281     RET(process_frames(ctx, out, in));
 282
 283     err = av_frame_copy_props(out, in);
 284     if (err < 0)
 285         goto fail;
 286
 287     av_frame_free(&in);
 288
 289     return ff_filter_frame(outlink, out);
 290
 291 fail:
 292     av_frame_free(&in);
 293     av_frame_free(&out);
 294     return err;
 295 }
 296
 297 static void chromaber_vulkan_uninit(AVFilterContext *avctx)
 298 {
 299     ChromaticAberrationVulkanContext *s = avctx->priv;
 300
 301     ff_vk_filter_uninit(avctx);
 302
 303     s->initialized = 0;
 304 }
 305
 306 #define OFFSET(x) offsetof(ChromaticAberrationVulkanContext, x)
 307 #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
 308 static const AVOption chromaber_vulkan_options[] = {
 309     { "dist_x", "Set horizontal distortion amount", OFFSET(opts.dist[0]), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, -10.0f, 10.0f, .flags = FLAGS },
 310     { "dist_y", "Set vertical distortion amount",   OFFSET(opts.dist[1]), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, -10.0f, 10.0f, .flags = FLAGS },
 311     { NULL },
 312 };
 313
 314 AVFILTER_DEFINE_CLASS(chromaber_vulkan);
 315
 316 static const AVFilterPad chromaber_vulkan_inputs[] = {
 317     {
 318         .name         = "default",
 319         .type         = AVMEDIA_TYPE_VIDEO,
 320         .filter_frame = &chromaber_vulkan_filter_frame,
 321         .config_props = &ff_vk_filter_config_input,
 322     },
 323     { NULL }
 324 };
 325
 326 static const AVFilterPad chromaber_vulkan_outputs[] = {
 327     {
 328         .name = "default",
 329         .type = AVMEDIA_TYPE_VIDEO,
 330         .config_props = &ff_vk_filter_config_output,
 331     },
 332     { NULL }
 333 };
 334
 335 AVFilter ff_vf_chromaber_vulkan = {
 336     .name           = "chromaber_vulkan",
 337     .description    = NULL_IF_CONFIG_SMALL("Offset chroma of input video (chromatic aberration)"),
 338     .priv_size      = sizeof(ChromaticAberrationVulkanContext),
 339     .init           = &ff_vk_filter_init,
 340     .uninit         = &chromaber_vulkan_uninit,
 341     .query_formats  = &ff_vk_filter_query_formats,
 342     .inputs         = chromaber_vulkan_inputs,
 343     .outputs        = chromaber_vulkan_outputs,
 344     .priv_class     = &chromaber_vulkan_class,
 345     .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
 346 };