Here are the data structures with brief descriptions:

array_output_data
async_frame
audio_action
audio_cb_info
audio_convert_info
audio_data
audio_output_data
audio_output_info
axisang
base_allocator
base_token
blend_state
bounds
calldata
caption_text
cf_def
cf_lexer
cf_parser
cf_preprocessor
cf_token
circlebuf
darray
decl_info
decl_param
delay_data
draw_callback
dstr
effect_parser
encoder_callback
encoder_frame
encoder_packet
ep_func
ep_param
ep_pass
ep_sampler
ep_struct
ep_technique
ep_var
error_data
error_item
gif_animation
gif_bitmap_callback_vt
gif_frame
graphics_subsystem
gs_display_mode
gs_effect
gs_effect_param
gs_effect_param_info
gs_effect_pass
gs_effect_technique
gs_exports
gs_image_file
gs_init_data
gs_monitor_info
gs_rect
gs_sampler_info
gs_shader_param_info
gs_tvertarray
gs_vb_data
gs_window
imaxdiv_t
item_action
lexer
matrix3
matrix4
media_frames_per_second
obs_audio_data
obs_audio_info
obs_context_data
obs_core
obs_core_audio
obs_core_data
obs_core_hotkeys
obs_core_video
obs_display
obs_encoder
obs_encoder_info
obs_hotkey
obs_hotkey_binding
obs_hotkey_pair
obs_hotkeys_translations
obs_key_combination
obs_key_event
obs_modal_ui
obs_modeless_ui
obs_module
obs_module_info
obs_module_path
obs_mouse_event
obs_output
obs_output_info
obs_scene
obs_scene_item
obs_sceneitem_crop
obs_service
obs_service_info
obs_source
obs_source_audio
obs_source_audio_mix
obs_source_frame
obs_source_info
obs_transform_info
obs_vframe_info
obs_video_info
obs_view
obs_weak_encoder
obs_weak_output
obs_weak_ref
obs_weak_service
obs_weak_source
os_dirent
os_glob_info
os_globent
pass_shaderparam
plane
profiler_time_entry
quat
resample_info
serializer
shader_func
shader_parser
shader_sampler
shader_struct
shader_var
strref
util_uint128
vec2
vec3
vec4
video_data
video_frame
video_output_info
video_scale_info
win_version_info