FFmpeg
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,
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 "libavutil/mem.h"
25 #include "libavutil/avassert.h"
26 
27 #include "glslang.h"
28 
29 static pthread_mutex_t glslang_mutex = PTHREAD_MUTEX_INITIALIZER;
30 static int glslang_refcount = 0;
31 
32 static const glslang_resource_t glslc_resource_limits = {
33  .max_lights = 32,
34  .max_clip_planes = 6,
35  .max_texture_units = 32,
36  .max_texture_coords = 32,
37  .max_vertex_attribs = 64,
38  .max_vertex_uniform_components = 4096,
39  .max_varying_floats = 64,
40  .max_vertex_texture_image_units = 32,
41  .max_combined_texture_image_units = 80,
42  .max_texture_image_units = 32,
43  .max_fragment_uniform_components = 4096,
44  .max_draw_buffers = 32,
45  .max_vertex_uniform_vectors = 128,
46  .max_varying_vectors = 8,
47  .max_fragment_uniform_vectors = 16,
48  .max_vertex_output_vectors = 16,
49  .max_fragment_input_vectors = 15,
50  .min_program_texel_offset = -8,
51  .max_program_texel_offset = 7,
52  .max_clip_distances = 8,
53  .max_compute_work_group_count_x = 65535,
54  .max_compute_work_group_count_y = 65535,
55  .max_compute_work_group_count_z = 65535,
56  .max_compute_work_group_size_x = 1024,
57  .max_compute_work_group_size_y = 1024,
58  .max_compute_work_group_size_z = 64,
59  .max_compute_uniform_components = 1024,
60  .max_compute_texture_image_units = 16,
61  .max_compute_image_uniforms = 8,
62  .max_compute_atomic_counters = 8,
63  .max_compute_atomic_counter_buffers = 1,
64  .max_varying_components = 60,
65  .max_vertex_output_components = 64,
66  .max_geometry_input_components = 64,
67  .max_geometry_output_components = 128,
68  .max_fragment_input_components = 128,
69  .max_image_units = 8,
70  .max_combined_image_units_and_fragment_outputs = 8,
71  .max_combined_shader_output_resources = 8,
72  .max_image_samples = 0,
73  .max_vertex_image_uniforms = 0,
74  .max_tess_control_image_uniforms = 0,
75  .max_tess_evaluation_image_uniforms = 0,
76  .max_geometry_image_uniforms = 0,
77  .max_fragment_image_uniforms = 8,
78  .max_combined_image_uniforms = 8,
79  .max_geometry_texture_image_units = 16,
80  .max_geometry_output_vertices = 256,
81  .max_geometry_total_output_components = 1024,
82  .max_geometry_uniform_components = 1024,
83  .max_geometry_varying_components = 64,
84  .max_tess_control_input_components = 128,
85  .max_tess_control_output_components = 128,
86  .max_tess_control_texture_image_units = 16,
87  .max_tess_control_uniform_components = 1024,
88  .max_tess_control_total_output_components = 4096,
89  .max_tess_evaluation_input_components = 128,
90  .max_tess_evaluation_output_components = 128,
91  .max_tess_evaluation_texture_image_units = 16,
92  .max_tess_evaluation_uniform_components = 1024,
93  .max_tess_patch_components = 120,
94  .max_patch_vertices = 32,
95  .max_tess_gen_level = 64,
96  .max_viewports = 16,
97  .max_vertex_atomic_counters = 0,
98  .max_tess_control_atomic_counters = 0,
99  .max_tess_evaluation_atomic_counters = 0,
100  .max_geometry_atomic_counters = 0,
101  .max_fragment_atomic_counters = 8,
102  .max_combined_atomic_counters = 8,
103  .max_atomic_counter_bindings = 1,
104  .max_vertex_atomic_counter_buffers = 0,
105  .max_tess_control_atomic_counter_buffers = 0,
106  .max_tess_evaluation_atomic_counter_buffers = 0,
107  .max_geometry_atomic_counter_buffers = 0,
108  .max_fragment_atomic_counter_buffers = 1,
109  .max_combined_atomic_counter_buffers = 1,
110  .max_atomic_counter_buffer_size = 16384,
111  .max_transform_feedback_buffers = 4,
112  .max_transform_feedback_interleaved_components = 64,
113  .max_cull_distances = 8,
114  .max_combined_clip_and_cull_distances = 8,
115  .max_samples = 4,
116  .max_mesh_output_vertices_nv = 256,
117  .max_mesh_output_primitives_nv = 512,
118  .max_mesh_work_group_size_x_nv = 32,
119  .max_mesh_work_group_size_y_nv = 1,
120  .max_mesh_work_group_size_z_nv = 1,
121  .max_task_work_group_size_x_nv = 32,
122  .max_task_work_group_size_y_nv = 1,
123  .max_task_work_group_size_z_nv = 1,
124  .max_mesh_view_count_nv = 4,
125  .maxDualSourceDrawBuffersEXT = 1,
126 
127  .limits = {
128  .non_inductive_for_loops = 1,
129  .while_loops = 1,
130  .do_while_loops = 1,
131  .general_uniform_indexing = 1,
132  .general_attribute_matrix_vector_indexing = 1,
133  .general_varying_indexing = 1,
134  .general_sampler_indexing = 1,
135  .general_variable_indexing = 1,
136  .general_constant_matrix_vector_indexing = 1,
137  }
138 };
139 
140 int ff_vk_glslang_shader_compile(AVFilterContext *avctx, FFSPIRVShader *shd,
141  uint8_t **data, size_t *size, 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(glslang_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  av_log(avctx, AV_LOG_WARNING, "%s\n", messages);
223 
224  glslang_shader_delete(glslc_shader);
225 
226  *size = glslang_program_SPIRV_get_size(glslc_program) * sizeof(unsigned int);
227  *data = (void *)glslang_program_SPIRV_get_ptr(glslc_program);
228  *opaque = glslc_program;
229 
230  return 0;
231 }
232 
233 void ff_vk_glslang_shader_free(void *opaque)
234 {
235  glslang_program_delete(opaque);
236 }
237 
238 int ff_vk_glslang_init(void)
239 {
240  int ret = 0;
241 
242  pthread_mutex_lock(&glslang_mutex);
243  if (glslang_refcount++ == 0)
244  ret = !glslang_initialize_process();
245  pthread_mutex_unlock(&glslang_mutex);
246 
247  return ret;
248 }
249 
250 void ff_vk_glslang_uninit(void)
251 {
252  pthread_mutex_lock(&glslang_mutex);
253  if (glslang_refcount && (--glslang_refcount == 0))
254  glslang_finalize_process();
255  pthread_mutex_unlock(&glslang_mutex);
256 }
pthread_mutex_t
_fmutex pthread_mutex_t
Definition: os2threads.h:53
ff_vk_print_shader
void ff_vk_print_shader(AVFilterContext *avctx, FFSPIRVShader *shd, int prio)
Pretty print shader, mainly used by shader compilers.
Definition: vulkan.c:1009
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
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
ff_vk_glslang_uninit
void ff_vk_glslang_uninit(void)
Definition: glslang.c:250
data
const char data[16]
Definition: mxf.c:143
glslang_refcount
static int glslang_refcount
Definition: glslang.c:30
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
glslang_mutex
static pthread_mutex_t glslang_mutex
Definition: glslang.c:29
glslc_resource_limits
static const glslang_resource_t glslc_resource_limits
Definition: glslang.c:32
pthread_mutex_unlock
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:68
size
int size
Definition: twinvq_data.h:10344
FFSPIRVShader::shader
VkPipelineShaderStageCreateInfo shader
Definition: vulkan.h:60
ff_vk_glslang_shader_free
void ff_vk_glslang_shader_free(void *opaque)
Frees the shader-specific context.
Definition: glslang.c:233
ff_vk_glslang_init
int ff_vk_glslang_init(void)
Un/initialize glslang's global state.
Definition: glslang.c:238
FFSPIRVShader::src
AVBPrint src
Definition: vulkan.h:58
glslang.h
ret
ret
Definition: filter_design.txt:187
AVFilterContext
An instance of a filter.
Definition: avfilter.h:386
mem.h
FFSPIRVShader
Definition: vulkan.h:56
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
int
int
Definition: ffmpeg_filter.c:156
ff_vk_glslang_shader_compile
int ff_vk_glslang_shader_compile(AVFilterContext *avctx, FFSPIRVShader *shd, uint8_t **data, size_t *size, void **opaque)
Compile GLSL into SPIR-V using glslang.
Definition: glslang.c:140
PTHREAD_MUTEX_INITIALIZER
#define PTHREAD_MUTEX_INITIALIZER
Definition: os2threads.h:56
pthread_mutex_lock
#define pthread_mutex_lock(a)
Definition: ffprobe.c:64
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