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 <pthread.h>
20
21#include <glslang/build_info.h>
22#include <glslang/Include/glslang_c_interface.h>
23
24#include "mem.h"
25#include "avassert.h"
26
27static pthread_mutex_t glslc_mutex = PTHREAD_MUTEX_INITIALIZER;
28static int glslc_refcount = 0;
29
30static const glslang_resource_t glslc_resource_limits = {
31    .max_lights = 32,
32    .max_clip_planes = 6,
33    .max_texture_units = 32,
34    .max_texture_coords = 32,
35    .max_vertex_attribs = 64,
36    .max_vertex_uniform_components = 4096,
37    .max_varying_floats = 64,
38    .max_vertex_texture_image_units = 32,
39    .max_combined_texture_image_units = 80,
40    .max_texture_image_units = 32,
41    .max_fragment_uniform_components = 4096,
42    .max_draw_buffers = 32,
43    .max_vertex_uniform_vectors = 128,
44    .max_varying_vectors = 8,
45    .max_fragment_uniform_vectors = 16,
46    .max_vertex_output_vectors = 16,
47    .max_fragment_input_vectors = 15,
48    .min_program_texel_offset = -8,
49    .max_program_texel_offset = 7,
50    .max_clip_distances = 8,
51    .max_compute_work_group_count_x = 65535,
52    .max_compute_work_group_count_y = 65535,
53    .max_compute_work_group_count_z = 65535,
54    .max_compute_work_group_size_x = 1024,
55    .max_compute_work_group_size_y = 1024,
56    .max_compute_work_group_size_z = 64,
57    .max_compute_uniform_components = 1024,
58    .max_compute_texture_image_units = 16,
59    .max_compute_image_uniforms = 8,
60    .max_compute_atomic_counters = 8,
61    .max_compute_atomic_counter_buffers = 1,
62    .max_varying_components = 60,
63    .max_vertex_output_components = 64,
64    .max_geometry_input_components = 64,
65    .max_geometry_output_components = 128,
66    .max_fragment_input_components = 128,
67    .max_image_units = 8,
68    .max_combined_image_units_and_fragment_outputs = 8,
69    .max_combined_shader_output_resources = 8,
70    .max_image_samples = 0,
71    .max_vertex_image_uniforms = 0,
72    .max_tess_control_image_uniforms = 0,
73    .max_tess_evaluation_image_uniforms = 0,
74    .max_geometry_image_uniforms = 0,
75    .max_fragment_image_uniforms = 8,
76    .max_combined_image_uniforms = 8,
77    .max_geometry_texture_image_units = 16,
78    .max_geometry_output_vertices = 256,
79    .max_geometry_total_output_components = 1024,
80    .max_geometry_uniform_components = 1024,
81    .max_geometry_varying_components = 64,
82    .max_tess_control_input_components = 128,
83    .max_tess_control_output_components = 128,
84    .max_tess_control_texture_image_units = 16,
85    .max_tess_control_uniform_components = 1024,
86    .max_tess_control_total_output_components = 4096,
87    .max_tess_evaluation_input_components = 128,
88    .max_tess_evaluation_output_components = 128,
89    .max_tess_evaluation_texture_image_units = 16,
90    .max_tess_evaluation_uniform_components = 1024,
91    .max_tess_patch_components = 120,
92    .max_patch_vertices = 32,
93    .max_tess_gen_level = 64,
94    .max_viewports = 16,
95    .max_vertex_atomic_counters = 0,
96    .max_tess_control_atomic_counters = 0,
97    .max_tess_evaluation_atomic_counters = 0,
98    .max_geometry_atomic_counters = 0,
99    .max_fragment_atomic_counters = 8,
100    .max_combined_atomic_counters = 8,
101    .max_atomic_counter_bindings = 1,
102    .max_vertex_atomic_counter_buffers = 0,
103    .max_tess_control_atomic_counter_buffers = 0,
104    .max_tess_evaluation_atomic_counter_buffers = 0,
105    .max_geometry_atomic_counter_buffers = 0,
106    .max_fragment_atomic_counter_buffers = 1,
107    .max_combined_atomic_counter_buffers = 1,
108    .max_atomic_counter_buffer_size = 16384,
109    .max_transform_feedback_buffers = 4,
110    .max_transform_feedback_interleaved_components = 64,
111    .max_cull_distances = 8,
112    .max_combined_clip_and_cull_distances = 8,
113    .max_samples = 4,
114    .max_mesh_output_vertices_nv = 256,
115    .max_mesh_output_primitives_nv = 512,
116    .max_mesh_work_group_size_x_nv = 32,
117    .max_mesh_work_group_size_y_nv = 1,
118    .max_mesh_work_group_size_z_nv = 1,
119    .max_task_work_group_size_x_nv = 32,
120    .max_task_work_group_size_y_nv = 1,
121    .max_task_work_group_size_z_nv = 1,
122    .max_mesh_view_count_nv = 4,
123    .maxDualSourceDrawBuffersEXT = 1,
124
125    .limits = {
126        .non_inductive_for_loops = 1,
127        .while_loops = 1,
128        .do_while_loops = 1,
129        .general_uniform_indexing = 1,
130        .general_attribute_matrix_vector_indexing = 1,
131        .general_varying_indexing = 1,
132        .general_sampler_indexing = 1,
133        .general_variable_indexing = 1,
134        .general_constant_matrix_vector_indexing = 1,
135    }
136};
137
138static int glslc_shader_compile(FFVkSPIRVCompiler *ctx, void *avctx,
139                                FFVkSPIRVShader *shd, uint8_t **data,
140                                size_t *size, const char *entrypoint,
141                                void **opaque)
142{
143    const char *messages;
144    glslang_shader_t *glslc_shader;
145    glslang_program_t *glslc_program;
146
147    static const glslang_stage_t glslc_stage[] = {
148        [VK_SHADER_STAGE_VERTEX_BIT]   = GLSLANG_STAGE_VERTEX,
149        [VK_SHADER_STAGE_FRAGMENT_BIT] = GLSLANG_STAGE_FRAGMENT,
150        [VK_SHADER_STAGE_COMPUTE_BIT]  = GLSLANG_STAGE_COMPUTE,
151    };
152
153    const glslang_input_t glslc_input = {
154        .language                          = GLSLANG_SOURCE_GLSL,
155        .stage                             = glslc_stage[shd->shader.stage],
156        .client                            = GLSLANG_CLIENT_VULKAN,
157        /* GLSLANG_TARGET_VULKAN_1_2 before 11.6 resulted in targeting 1.0 */
158#if (((GLSLANG_VERSION_MAJOR) > 11) || ((GLSLANG_VERSION_MAJOR) == 11 && \
159    (((GLSLANG_VERSION_MINOR) >  6) || ((GLSLANG_VERSION_MINOR) ==  6 && \
160     ((GLSLANG_VERSION_PATCH) > 0)))))
161        .client_version                    = GLSLANG_TARGET_VULKAN_1_2,
162        .target_language_version           = GLSLANG_TARGET_SPV_1_5,
163#else
164        .client_version                    = GLSLANG_TARGET_VULKAN_1_1,
165        .target_language_version           = GLSLANG_TARGET_SPV_1_3,
166#endif
167        .target_language                   = GLSLANG_TARGET_SPV,
168        .code                              = shd->src.str,
169        .default_version                   = 460,
170        .default_profile                   = GLSLANG_NO_PROFILE,
171        .force_default_version_and_profile = false,
172        .forward_compatible                = false,
173        .messages                          = GLSLANG_MSG_DEFAULT_BIT,
174        .resource                          = &glslc_resource_limits,
175    };
176
177    av_assert0(glslc_refcount);
178
179    if (!(glslc_shader = glslang_shader_create(&glslc_input)))
180        return AVERROR(ENOMEM);
181
182    if (!glslang_shader_preprocess(glslc_shader, &glslc_input)) {
183        ff_vk_print_shader(avctx, shd, AV_LOG_WARNING);
184        av_log(avctx, AV_LOG_ERROR, "Unable to preprocess shader: %s (%s)!\n",
185               glslang_shader_get_info_log(glslc_shader),
186               glslang_shader_get_info_debug_log(glslc_shader));
187        glslang_shader_delete(glslc_shader);
188        return AVERROR(EINVAL);
189    }
190
191    if (!glslang_shader_parse(glslc_shader, &glslc_input)) {
192        ff_vk_print_shader(avctx, shd, AV_LOG_WARNING);
193        av_log(avctx, AV_LOG_ERROR, "Unable to parse shader: %s (%s)!\n",
194               glslang_shader_get_info_log(glslc_shader),
195               glslang_shader_get_info_debug_log(glslc_shader));
196        glslang_shader_delete(glslc_shader);
197        return AVERROR(EINVAL);
198    }
199
200    if (!(glslc_program = glslang_program_create())) {
201        glslang_shader_delete(glslc_shader);
202        return AVERROR(EINVAL);
203    }
204
205    glslang_program_add_shader(glslc_program, glslc_shader);
206
207    if (!glslang_program_link(glslc_program, GLSLANG_MSG_SPV_RULES_BIT |
208                                             GLSLANG_MSG_VULKAN_RULES_BIT)) {
209        ff_vk_print_shader(avctx, shd, AV_LOG_WARNING);
210        av_log(avctx, AV_LOG_ERROR, "Unable to link shader: %s (%s)!\n",
211               glslang_program_get_info_log(glslc_program),
212               glslang_program_get_info_debug_log(glslc_program));
213        glslang_program_delete(glslc_program);
214        glslang_shader_delete(glslc_shader);
215        return AVERROR(EINVAL);
216    }
217
218    glslang_program_SPIRV_generate(glslc_program, glslc_input.stage);
219
220    messages = glslang_program_SPIRV_get_messages(glslc_program);
221    if (messages) {
222        ff_vk_print_shader(avctx, shd, AV_LOG_WARNING);
223        av_log(avctx, AV_LOG_WARNING, "%s\n", messages);
224    } else {
225        ff_vk_print_shader(avctx, shd, AV_LOG_VERBOSE);
226    }
227
228    glslang_shader_delete(glslc_shader);
229
230    *size = glslang_program_SPIRV_get_size(glslc_program) * sizeof(unsigned int);
231    *data = (void *)glslang_program_SPIRV_get_ptr(glslc_program);
232    *opaque = glslc_program;
233
234    return 0;
235}
236
237static void glslc_shader_free(FFVkSPIRVCompiler *ctx, void **opaque)
238{
239    if (!opaque || !*opaque)
240        return;
241
242    av_assert0(glslc_refcount);
243    glslang_program_delete(*opaque);
244    *opaque = NULL;
245}
246
247static void glslc_uninit(FFVkSPIRVCompiler **ctx)
248{
249    if (!ctx || !*ctx)
250        return;
251
252    pthread_mutex_lock(&glslc_mutex);
253    if (glslc_refcount && (--glslc_refcount == 0))
254        glslang_finalize_process();
255    pthread_mutex_unlock(&glslc_mutex);
256
257    av_freep(ctx);
258}
259
260static FFVkSPIRVCompiler *ff_vk_glslang_init(void)
261{
262    FFVkSPIRVCompiler *ret = av_mallocz(sizeof(*ret));
263    if (!ret)
264        return NULL;
265
266    ret->compile_shader = glslc_shader_compile;
267    ret->free_shader    = glslc_shader_free;
268    ret->uninit         = glslc_uninit;
269
270    pthread_mutex_lock(&glslc_mutex);
271    if (!glslc_refcount++) {
272        if (!glslang_initialize_process()) {
273            av_freep(&ret);
274            glslc_refcount--;
275        }
276    }
277    pthread_mutex_unlock(&glslc_mutex);
278
279    return ret;
280}
281