aboutsummaryrefslogtreecommitdiffstats
path: root/libavfilter/vf_gblur_vulkan.c
blob: 0a36121fed5ac77cc8d8cade1d39fff89ba108e4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
/*
 * copyright (c) 2021-2022 Wu Jianhua <jianhua.wu@intel.com>
 * Copyright (c) Lynne
 *
 * 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/mem.h"
#include "libavutil/random_seed.h"
#include "libavutil/opt.h"
#include "libavutil/vulkan_spirv.h"
#include "vulkan_filter.h"

#include "filters.h"
#include "video.h"

#define CGS 32
#define GBLUR_MAX_KERNEL_SIZE 127

typedef struct GBlurVulkanContext {
    FFVulkanContext vkctx;

    int initialized;
    FFVkExecPool e;
    FFVkQueueFamilyCtx qf;
    VkSampler sampler;
    FFVulkanShader shd_hor;
    FFVkBuffer params_hor;
    FFVulkanShader shd_ver;
    FFVkBuffer params_ver;

    int size;
    int sizeV;
    int planes;
    float sigma;
    float sigmaV;
} GBlurVulkanContext;

static const char gblur_func[] = {
    C(0, void gblur(const ivec2 pos, const int index)                           )
    C(0, {                                                                      )
    C(1,     vec4 sum = texture(input_images[index], pos) * kernel[0];          )
    C(0,                                                                        )
    C(1,     for(int i = 1; i < kernel.length(); i++) {                         )
    C(2,         sum += texture(input_images[index], pos + OFFSET) * kernel[i]; )
    C(2,         sum += texture(input_images[index], pos - OFFSET) * kernel[i]; )
    C(1,     }                                                                  )
    C(0,                                                                        )
    C(1,     imageStore(output_images[index], pos, sum);                        )
    C(0, }                                                                      )
};

static inline float gaussian(float sigma, float x)
{
    return 1.0 / (sqrt(2.0 * M_PI) * sigma) *
           exp(-(x * x) / (2.0 * sigma * sigma));
}

static inline float gaussian_simpson_integration(float sigma, float a, float b)
{
    return (b - a) * (1.0 / 6.0) * ((gaussian(sigma, a) +
           4.0 * gaussian(sigma, (a + b) * 0.5) + gaussian(sigma, b)));
}

static void init_gaussian_kernel(float *kernel, float sigma, float kernel_size)
{
    int x;
    float sum;

    sum = 0;
    for (x = 0; x < kernel_size; x++) {
        kernel[x] = gaussian_simpson_integration(sigma, x - 0.5f, x + 0.5f);
        if (!x)
            sum += kernel[x];
        else
            sum += kernel[x] * 2.0;
    }
    /* Normalized */
    sum = 1.0 / sum;
    for (x = 0; x < kernel_size; x++) {
        kernel[x] *= sum;
    }
}

static inline void init_kernel_size(GBlurVulkanContext *s, int *out_size)
{
    int size = *out_size;

    if (!(size & 1)) {
        av_log(s, AV_LOG_WARNING, "The kernel size should be odd\n");
        size++;
    }

    *out_size = (size >> 1) + 1;
}

static av_cold void init_gaussian_params(GBlurVulkanContext *s)
{
    if (s->sigmaV <= 0)
        s->sigmaV = s->sigma;

    init_kernel_size(s, &s->size);

    if (s->sizeV <= 0)
        s->sizeV = s->size;
    else
        init_kernel_size(s, &s->sizeV);
}

static int init_gblur_pipeline(GBlurVulkanContext *s,
                               FFVulkanShader *shd, FFVkBuffer *params_buf,
                               int ksize, float sigma, FFVkSPIRVCompiler *spv)
{
    int err = 0;
    uint8_t *kernel_mapped;
    uint8_t *spv_data;
    size_t spv_len;
    void *spv_opaque = NULL;

    const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);

    FFVulkanDescriptorSetBinding buf_desc = {
        .name        = "data",
        .type        = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
        .mem_quali   = "readonly",
        .mem_layout  = "std430",
        .stages      = VK_SHADER_STAGE_COMPUTE_BIT,
        .buf_content = NULL,
    };

    char *kernel_def = av_asprintf("float kernel[%i];", ksize);
    if (!kernel_def)
        return AVERROR(ENOMEM);

    buf_desc.buf_content = kernel_def;

    RET(ff_vk_shader_add_descriptor_set(&s->vkctx, shd, &buf_desc, 1, 1, 0));

    GLSLD(   gblur_func                                               );
    GLSLC(0, void main()                                              );
    GLSLC(0, {                                                        );
    GLSLC(1,     ivec2 size;                                          );
    GLSLC(1,     const ivec2 pos = ivec2(gl_GlobalInvocationID.xy);   );
    for (int i = 0; i < planes; i++) {
        GLSLC(0,                                                      );
        GLSLF(1,  size = imageSize(output_images[%i]);              ,i);
        GLSLC(1,  if (!IS_WITHIN(pos, size))                          );
        GLSLC(2,      return;                                         );
        if (s->planes & (1 << i)) {
            GLSLF(1,      gblur(pos, %i);                           ,i);
        } else {
            GLSLF(1, vec4 res = texture(input_images[%i], pos);     ,i);
            GLSLF(1, imageStore(output_images[%i], pos, res);       ,i);
        }
    }
    GLSLC(0, }                                                        );

    RET(spv->compile_shader(&s->vkctx, spv, shd, &spv_data, &spv_len, "main",
                            &spv_opaque));
    RET(ff_vk_shader_link(&s->vkctx, shd, spv_data, spv_len, "main"));

    RET(ff_vk_shader_register_exec(&s->vkctx, &s->e, shd));

    RET(ff_vk_create_buf(&s->vkctx, params_buf, sizeof(float) * ksize, NULL, NULL,
                         VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT |
                         VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
                         VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT));
    RET(ff_vk_map_buffer(&s->vkctx, params_buf, &kernel_mapped, 0));

    init_gaussian_kernel((float *)kernel_mapped, sigma, ksize);

    RET(ff_vk_unmap_buffer(&s->vkctx, params_buf, 1));
    RET(ff_vk_shader_update_desc_buffer(&s->vkctx, &s->e.contexts[0], shd, 1, 0, 0,
                                        params_buf, 0, params_buf->size,
                                        VK_FORMAT_UNDEFINED));

fail:
    av_free(kernel_def);
    if (spv_opaque)
        spv->free_shader(spv, &spv_opaque);
    return err;
}

static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
{
    int err = 0;
    GBlurVulkanContext *s = ctx->priv;
    FFVulkanContext *vkctx = &s->vkctx;
    const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);

    FFVulkanShader *shd;
    FFVkSPIRVCompiler *spv;
    FFVulkanDescriptorSetBinding *desc;

    spv = ff_vk_spirv_init();
    if (!spv) {
        av_log(ctx, AV_LOG_ERROR, "Unable to initialize SPIR-V compiler!\n");
        return AVERROR_EXTERNAL;
    }

    ff_vk_qf_init(vkctx, &s->qf, VK_QUEUE_COMPUTE_BIT);
    RET(ff_vk_exec_pool_init(vkctx, &s->qf, &s->e, s->qf.nb_queues*4, 0, 0, 0, NULL));
    RET(ff_vk_init_sampler(vkctx, &s->sampler, 1, VK_FILTER_LINEAR));

    desc = (FFVulkanDescriptorSetBinding []) {
        {
            .name       = "input_images",
            .type       = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
            .dimensions = 2,
            .elems      = planes,
            .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
            .samplers   = DUP_SAMPLER(s->sampler),
        },
        {
            .name       = "output_images",
            .type       = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
            .mem_layout = ff_vk_shader_rep_fmt(s->vkctx.output_format, FF_VK_REP_FLOAT),
            .mem_quali  = "writeonly",
            .dimensions = 2,
            .elems      = planes,
            .stages     = VK_SHADER_STAGE_COMPUTE_BIT,
        },
    };

    init_gaussian_params(s);

    {
        shd = &s->shd_hor;
        RET(ff_vk_shader_init(vkctx, shd, "gblur_hor",
                              VK_SHADER_STAGE_COMPUTE_BIT,
                              NULL, 0,
                              32, 1, 1,
                              0));

        RET(ff_vk_shader_add_descriptor_set(vkctx, shd, desc, 2, 0, 0));

        GLSLC(0, #define OFFSET (vec2(i, 0.0)));
        RET(init_gblur_pipeline(s, shd, &s->params_hor, s->size, s->sigma, spv));
    }

    {
        shd = &s->shd_ver;
        RET(ff_vk_shader_init(vkctx, shd, "gblur_hor",
                              VK_SHADER_STAGE_COMPUTE_BIT,
                              NULL, 0,
                              1, 32, 1,
                              0));

        RET(ff_vk_shader_add_descriptor_set(vkctx, shd, desc, 2, 0, 0));

        GLSLC(0, #define OFFSET (vec2(0.0, i)));
        RET(init_gblur_pipeline(s, shd, &s->params_ver, s->sizeV, s->sigmaV, spv));
    }

    s->initialized = 1;

fail:
    if (spv)
        spv->uninit(&spv);

    return err;
}

static av_cold void gblur_vulkan_uninit(AVFilterContext *avctx)
{
    GBlurVulkanContext *s = avctx->priv;
    FFVulkanContext *vkctx = &s->vkctx;
    FFVulkanFunctions *vk = &vkctx->vkfn;

    ff_vk_exec_pool_free(vkctx, &s->e);
    ff_vk_shader_free(vkctx, &s->shd_hor);
    ff_vk_shader_free(vkctx, &s->shd_ver);
    ff_vk_free_buf(vkctx, &s->params_hor);
    ff_vk_free_buf(vkctx, &s->params_ver);

    if (s->sampler)
        vk->DestroySampler(vkctx->hwctx->act_dev, s->sampler,
                           vkctx->hwctx->alloc);

    ff_vk_uninit(&s->vkctx);

    s->initialized = 0;
}

static int gblur_vulkan_filter_frame(AVFilterLink *link, AVFrame *in)
{
    int err;
    AVFrame *tmp = NULL, *out = NULL;
    AVFilterContext *ctx = link->dst;
    GBlurVulkanContext *s = ctx->priv;
    AVFilterLink *outlink = ctx->outputs[0];

    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
    if (!out) {
        err = AVERROR(ENOMEM);
        goto fail;
    }

    tmp = ff_get_video_buffer(outlink, outlink->w, outlink->h);
    if (!tmp) {
        err = AVERROR(ENOMEM);
        goto fail;
    }

    if (!s->initialized)
        RET(init_filter(ctx, in));

    RET(ff_vk_filter_process_2pass(&s->vkctx, &s->e,
                                   (FFVulkanShader *[2]){ &s->shd_hor, &s->shd_ver },
                                   out, tmp, in, s->sampler, NULL, 0));

    err = av_frame_copy_props(out, in);
    if (err < 0)
        goto fail;

    av_frame_free(&in);
    av_frame_free(&tmp);

    return ff_filter_frame(outlink, out);

fail:
    av_frame_free(&in);
    av_frame_free(&tmp);
    av_frame_free(&out);
    return err;
}

#define OFFSET(x) offsetof(GBlurVulkanContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption gblur_vulkan_options[] = {
    { "sigma",  "Set sigma",                OFFSET(sigma),  AV_OPT_TYPE_FLOAT, { .dbl = 0.5 }, 0.01, 1024.0,                FLAGS },
    { "sigmaV", "Set vertical sigma",       OFFSET(sigmaV), AV_OPT_TYPE_FLOAT, { .dbl = 0   }, 0.0,  1024.0,                FLAGS },
    { "planes", "Set planes to filter",     OFFSET(planes), AV_OPT_TYPE_INT,   { .i64 = 0xF }, 0,    0xF,                   FLAGS },
    { "size",   "Set kernel size",          OFFSET(size),   AV_OPT_TYPE_INT,   { .i64 = 19  }, 1,    GBLUR_MAX_KERNEL_SIZE, FLAGS },
    { "sizeV",  "Set vertical kernel size", OFFSET(sizeV),  AV_OPT_TYPE_INT,   { .i64 = 0   }, 0,    GBLUR_MAX_KERNEL_SIZE, FLAGS },
    { NULL },
};

AVFILTER_DEFINE_CLASS(gblur_vulkan);

static const AVFilterPad gblur_vulkan_inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = &gblur_vulkan_filter_frame,
        .config_props = &ff_vk_filter_config_input,
    }
};

static const AVFilterPad gblur_vulkan_outputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = &ff_vk_filter_config_output,
    }
};

const AVFilter ff_vf_gblur_vulkan = {
    .name           = "gblur_vulkan",
    .description    = NULL_IF_CONFIG_SMALL("Gaussian Blur in Vulkan"),
    .priv_size      = sizeof(GBlurVulkanContext),
    .init           = &ff_vk_filter_init,
    .uninit         = &gblur_vulkan_uninit,
    FILTER_INPUTS(gblur_vulkan_inputs),
    FILTER_OUTPUTS(gblur_vulkan_outputs),
    FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VULKAN),
    .priv_class     = &gblur_vulkan_class,
    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
    .flags          = AVFILTER_FLAG_HWDEVICE,
};