FFmpeg
vulkan_glslang.c
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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,
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11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
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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 "vulkan_spirv.h"
25 #include "libavutil/mem.h"
26 #include "libavutil/avassert.h"
27 
28 static pthread_mutex_t glslc_mutex = PTHREAD_MUTEX_INITIALIZER;
29 static int glslc_refcount = 0;
30 
31 static const glslang_resource_t glslc_resource_limits = {
32  .max_lights = 32,
33  .max_clip_planes = 6,
34  .max_texture_units = 32,
35  .max_texture_coords = 32,
36  .max_vertex_attribs = 64,
37  .max_vertex_uniform_components = 4096,
38  .max_varying_floats = 64,
39  .max_vertex_texture_image_units = 32,
40  .max_combined_texture_image_units = 80,
41  .max_texture_image_units = 32,
42  .max_fragment_uniform_components = 4096,
43  .max_draw_buffers = 32,
44  .max_vertex_uniform_vectors = 128,
45  .max_varying_vectors = 8,
46  .max_fragment_uniform_vectors = 16,
47  .max_vertex_output_vectors = 16,
48  .max_fragment_input_vectors = 15,
49  .min_program_texel_offset = -8,
50  .max_program_texel_offset = 7,
51  .max_clip_distances = 8,
52  .max_compute_work_group_count_x = 65535,
53  .max_compute_work_group_count_y = 65535,
54  .max_compute_work_group_count_z = 65535,
55  .max_compute_work_group_size_x = 1024,
56  .max_compute_work_group_size_y = 1024,
57  .max_compute_work_group_size_z = 64,
58  .max_compute_uniform_components = 1024,
59  .max_compute_texture_image_units = 16,
60  .max_compute_image_uniforms = 8,
61  .max_compute_atomic_counters = 8,
62  .max_compute_atomic_counter_buffers = 1,
63  .max_varying_components = 60,
64  .max_vertex_output_components = 64,
65  .max_geometry_input_components = 64,
66  .max_geometry_output_components = 128,
67  .max_fragment_input_components = 128,
68  .max_image_units = 8,
69  .max_combined_image_units_and_fragment_outputs = 8,
70  .max_combined_shader_output_resources = 8,
71  .max_image_samples = 0,
72  .max_vertex_image_uniforms = 0,
73  .max_tess_control_image_uniforms = 0,
74  .max_tess_evaluation_image_uniforms = 0,
75  .max_geometry_image_uniforms = 0,
76  .max_fragment_image_uniforms = 8,
77  .max_combined_image_uniforms = 8,
78  .max_geometry_texture_image_units = 16,
79  .max_geometry_output_vertices = 256,
80  .max_geometry_total_output_components = 1024,
81  .max_geometry_uniform_components = 1024,
82  .max_geometry_varying_components = 64,
83  .max_tess_control_input_components = 128,
84  .max_tess_control_output_components = 128,
85  .max_tess_control_texture_image_units = 16,
86  .max_tess_control_uniform_components = 1024,
87  .max_tess_control_total_output_components = 4096,
88  .max_tess_evaluation_input_components = 128,
89  .max_tess_evaluation_output_components = 128,
90  .max_tess_evaluation_texture_image_units = 16,
91  .max_tess_evaluation_uniform_components = 1024,
92  .max_tess_patch_components = 120,
93  .max_patch_vertices = 32,
94  .max_tess_gen_level = 64,
95  .max_viewports = 16,
96  .max_vertex_atomic_counters = 0,
97  .max_tess_control_atomic_counters = 0,
98  .max_tess_evaluation_atomic_counters = 0,
99  .max_geometry_atomic_counters = 0,
100  .max_fragment_atomic_counters = 8,
101  .max_combined_atomic_counters = 8,
102  .max_atomic_counter_bindings = 1,
103  .max_vertex_atomic_counter_buffers = 0,
104  .max_tess_control_atomic_counter_buffers = 0,
105  .max_tess_evaluation_atomic_counter_buffers = 0,
106  .max_geometry_atomic_counter_buffers = 0,
107  .max_fragment_atomic_counter_buffers = 1,
108  .max_combined_atomic_counter_buffers = 1,
109  .max_atomic_counter_buffer_size = 16384,
110  .max_transform_feedback_buffers = 4,
111  .max_transform_feedback_interleaved_components = 64,
112  .max_cull_distances = 8,
113  .max_combined_clip_and_cull_distances = 8,
114  .max_samples = 4,
115  .max_mesh_output_vertices_nv = 256,
116  .max_mesh_output_primitives_nv = 512,
117  .max_mesh_work_group_size_x_nv = 32,
118  .max_mesh_work_group_size_y_nv = 1,
119  .max_mesh_work_group_size_z_nv = 1,
120  .max_task_work_group_size_x_nv = 32,
121  .max_task_work_group_size_y_nv = 1,
122  .max_task_work_group_size_z_nv = 1,
123  .max_mesh_view_count_nv = 4,
124  .maxDualSourceDrawBuffersEXT = 1,
125 
126  .limits = {
127  .non_inductive_for_loops = 1,
128  .while_loops = 1,
129  .do_while_loops = 1,
130  .general_uniform_indexing = 1,
131  .general_attribute_matrix_vector_indexing = 1,
132  .general_varying_indexing = 1,
133  .general_sampler_indexing = 1,
134  .general_variable_indexing = 1,
135  .general_constant_matrix_vector_indexing = 1,
136  }
137 };
138 
139 static int glslc_shader_compile(FFVkSPIRVCompiler *ctx, void *avctx,
140  FFVkSPIRVShader *shd, uint8_t **data,
141  size_t *size, const char *entrypoint,
142  void **opaque)
143 {
144  const char *messages;
145  glslang_shader_t *glslc_shader;
146  glslang_program_t *glslc_program;
147 
148  static const glslang_stage_t glslc_stage[] = {
149  [VK_SHADER_STAGE_VERTEX_BIT] = GLSLANG_STAGE_VERTEX,
150  [VK_SHADER_STAGE_FRAGMENT_BIT] = GLSLANG_STAGE_FRAGMENT,
151  [VK_SHADER_STAGE_COMPUTE_BIT] = GLSLANG_STAGE_COMPUTE,
152  };
153 
154  const glslang_input_t glslc_input = {
155  .language = GLSLANG_SOURCE_GLSL,
156  .stage = glslc_stage[shd->shader.stage],
157  .client = GLSLANG_CLIENT_VULKAN,
158  /* GLSLANG_TARGET_VULKAN_1_2 before 11.6 resulted in targeting 1.0 */
159 #if (((GLSLANG_VERSION_MAJOR) > 11) || ((GLSLANG_VERSION_MAJOR) == 11 && \
160  (((GLSLANG_VERSION_MINOR) > 6) || ((GLSLANG_VERSION_MINOR) == 6 && \
161  ((GLSLANG_VERSION_PATCH) > 0)))))
162  .client_version = GLSLANG_TARGET_VULKAN_1_2,
163  .target_language_version = GLSLANG_TARGET_SPV_1_5,
164 #else
165  .client_version = GLSLANG_TARGET_VULKAN_1_1,
166  .target_language_version = GLSLANG_TARGET_SPV_1_3,
167 #endif
168  .target_language = GLSLANG_TARGET_SPV,
169  .code = shd->src.str,
170  .default_version = 460,
171  .default_profile = GLSLANG_NO_PROFILE,
172  .force_default_version_and_profile = false,
173  .forward_compatible = false,
174  .messages = GLSLANG_MSG_DEFAULT_BIT,
175  .resource = &glslc_resource_limits,
176  };
177 
178  av_assert0(glslc_refcount);
179 
180  *opaque = NULL;
181 
182  if (!(glslc_shader = glslang_shader_create(&glslc_input)))
183  return AVERROR(ENOMEM);
184 
185  if (!glslang_shader_preprocess(glslc_shader, &glslc_input)) {
186  ff_vk_shader_print(avctx, shd, AV_LOG_WARNING);
187  av_log(avctx, AV_LOG_ERROR, "Unable to preprocess shader: %s (%s)!\n",
188  glslang_shader_get_info_log(glslc_shader),
189  glslang_shader_get_info_debug_log(glslc_shader));
190  glslang_shader_delete(glslc_shader);
191  return AVERROR(EINVAL);
192  }
193 
194  if (!glslang_shader_parse(glslc_shader, &glslc_input)) {
195  ff_vk_shader_print(avctx, shd, AV_LOG_WARNING);
196  av_log(avctx, AV_LOG_ERROR, "Unable to parse shader: %s (%s)!\n",
197  glslang_shader_get_info_log(glslc_shader),
198  glslang_shader_get_info_debug_log(glslc_shader));
199  glslang_shader_delete(glslc_shader);
200  return AVERROR(EINVAL);
201  }
202 
203  if (!(glslc_program = glslang_program_create())) {
204  glslang_shader_delete(glslc_shader);
205  return AVERROR(EINVAL);
206  }
207 
208  glslang_program_add_shader(glslc_program, glslc_shader);
209 
210  if (!glslang_program_link(glslc_program, GLSLANG_MSG_SPV_RULES_BIT |
211  GLSLANG_MSG_VULKAN_RULES_BIT)) {
212  ff_vk_shader_print(avctx, shd, AV_LOG_WARNING);
213  av_log(avctx, AV_LOG_ERROR, "Unable to link shader: %s (%s)!\n",
214  glslang_program_get_info_log(glslc_program),
215  glslang_program_get_info_debug_log(glslc_program));
216  glslang_program_delete(glslc_program);
217  glslang_shader_delete(glslc_shader);
218  return AVERROR(EINVAL);
219  }
220 
221  glslang_program_SPIRV_generate(glslc_program, glslc_input.stage);
222 
223  messages = glslang_program_SPIRV_get_messages(glslc_program);
224  if (messages) {
225  ff_vk_shader_print(avctx, shd, AV_LOG_WARNING);
226  av_log(avctx, AV_LOG_WARNING, "%s\n", messages);
227  } else {
228  ff_vk_shader_print(avctx, shd, AV_LOG_VERBOSE);
229  }
230 
231  glslang_shader_delete(glslc_shader);
232 
233  *size = glslang_program_SPIRV_get_size(glslc_program) * sizeof(unsigned int);
234  *data = (void *)glslang_program_SPIRV_get_ptr(glslc_program);
235  *opaque = glslc_program;
236 
237  return 0;
238 }
239 
240 static void glslc_shader_free(FFVkSPIRVCompiler *ctx, void **opaque)
241 {
242  if (!opaque || !*opaque)
243  return;
244 
245  av_assert0(glslc_refcount);
246  glslang_program_delete(*opaque);
247  *opaque = NULL;
248 }
249 
250 static void glslc_uninit(FFVkSPIRVCompiler **ctx)
251 {
252  if (!ctx || !*ctx)
253  return;
254 
255  pthread_mutex_lock(&glslc_mutex);
256  if (glslc_refcount && (--glslc_refcount == 0))
257  glslang_finalize_process();
258  pthread_mutex_unlock(&glslc_mutex);
259 
260  av_freep(ctx);
261 }
262 
263 FFVkSPIRVCompiler *ff_vk_glslang_init(void)
264 {
265  FFVkSPIRVCompiler *ret = av_mallocz(sizeof(*ret));
266  if (!ret)
267  return NULL;
268 
269  ret->compile_shader = glslc_shader_compile;
270  ret->free_shader = glslc_shader_free;
271  ret->uninit = glslc_uninit;
272 
273  pthread_mutex_lock(&glslc_mutex);
274  if (!glslc_refcount++) {
275  if (!glslang_initialize_process()) {
276  av_freep(&ret);
277  glslc_refcount--;
278  }
279  }
280  pthread_mutex_unlock(&glslc_mutex);
281 
282  return ret;
283 }
pthread_mutex_t
_fmutex pthread_mutex_t
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AV_LOG_WARNING
#define AV_LOG_WARNING
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Definition: log.h:186
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
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