174 lines
7.2 KiB
Plaintext
174 lines
7.2 KiB
Plaintext
// models.config, and running a model: creating its onnxruntime session on the GPU or the CPU, and
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// running it on a float tensor.
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Ocr_Model_Info :: struct {
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name: string;
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title: string;
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detector, recognizer, dictionary: string; // file names in the models folder
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det_max_side: s32 = 2560;
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det_tile_height: s32 = 1536;
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det_threshold: float = 0.3;
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box_threshold: float = 0.6;
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unclip_ratio: float = 1.5;
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rec_height: s32 = 48;
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rec_batch: s32 = 16;
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}
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OCR_MODELS_CONFIG :: "models.config";
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// The models models.config lists, in its order; allocated with the context allocator. A line that
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// cannot be read is logged and skipped, as in the Ex4 formats.
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ocr_list_models :: (models_folder: string) -> [] Ocr_Model_Info, error: string {
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models: [..] Ocr_Model_Info;
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path := tprint("%/%", models_folder, OCR_MODELS_CONFIG);
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text, ok := read_entire_file(path, log_errors = false,, temp);
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if !ok return models, tprint("Cannot read %.", path);
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model: *Ocr_Model_Info;
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version_seen := false;
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line_number := 0;
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for raw_line: split(text, "\n",, temp) {
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line_number += 1;
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line := trim(ocr_strip_comment(raw_line));
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if !line.count continue;
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if begins_with(line, "@version") { version_seen = true; continue; }
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if !version_seen return models, tprint("% does not start with @version 1.", path);
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if begins_with(line, "[model ") && ends_with(line, "]") {
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model = array_add(*models);
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model.* = .{};
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model.name = copy_string(trim(slice(line, 7, line.count - 8)));
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continue;
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}
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colon := find_index_from_left(line, #char ":");
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if colon < 0 || !model { log_error("[OCR] %:%: expected `key: value` under a [model NAME]. Ignored.", path, line_number); continue; }
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key := trim(slice(line, 0, colon));
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value := trim(advance(line, colon + 1));
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if value.count >= 2 && value[0] == #char "\"" && value[value.count - 1] == #char "\"" value = slice(value, 1, value.count - 2);
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number_text := value;
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number, number_ok := string_to_float(number_text);
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if key == {
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case "title"; model.title = copy_string(value);
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case "detector"; model.detector = copy_string(value);
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case "recognizer"; model.recognizer = copy_string(value);
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case "dictionary"; model.dictionary = copy_string(value);
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case "det_max_side"; if number_ok model.det_max_side = cast(s32) number;
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case "det_tile_height"; if number_ok model.det_tile_height = cast(s32) number;
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case "det_threshold"; if number_ok model.det_threshold = number;
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case "box_threshold"; if number_ok model.box_threshold = number;
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case "unclip_ratio"; if number_ok model.unclip_ratio = number;
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case "rec_height"; if number_ok model.rec_height = cast(s32) number;
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case "rec_batch"; if number_ok model.rec_batch = cast(s32) number;
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case; log_error("[OCR] %:%: unknown key %. Ignored.", path, line_number, key);
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}
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}
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return models, "";
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}
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#scope_module
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// "#" opens a comment at the start of a line or after whitespace, outside quotes.
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ocr_strip_comment :: (line: string) -> string {
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in_quotes := false;
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for i: 0..line.count - 1 {
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c := line[i];
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if c == #char "\"" in_quotes = !in_quotes;
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else if c == #char "#" && !in_quotes && (i == 0 || line[i - 1] == #char " " || line[i - 1] == #char "\t") return slice(line, 0, i);
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}
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return line;
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}
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Ocr_Session :: struct {
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session: *OrtSession;
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input_name, output_name: *u8; // heap C strings
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}
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// A session for the model file; with CUDA when gpu is set. On failure, the reason.
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ocr_create_session :: (env: *OrtEnv, path: string, gpu: bool, intra_op_threads: s32) -> Ocr_Session, ok: bool, error: string {
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result: Ocr_Session;
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api := ort.api;
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options: *OrtSessionOptions;
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ok, error := ort_check(api.CreateSessionOptions(*options));
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if !ok return result, false, error;
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defer api.ReleaseSessionOptions(options);
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ort_check(api.SetSessionGraphOptimizationLevel(options, .ORT_ENABLE_ALL));
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ort_check(api.SetIntraOpNumThreads(options, intra_op_threads));
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ort_check(api.SetInterOpNumThreads(options, 1));
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if gpu {
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cuda: *OrtCUDAProviderOptionsV2;
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ok, error = ort_check(api.CreateCUDAProviderOptions(*cuda));
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if !ok return result, false, error;
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defer api.ReleaseCUDAProviderOptions(cuda);
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// Every image is a different size: an exhaustive cuDNN search would be redone for each new shape.
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keys := (*u8).["device_id", "cudnn_conv_algo_search", "arena_extend_strategy"];
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values := (*u8).["0", "HEURISTIC", "kSameAsRequested"];
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ok, error = ort_check(api.UpdateCUDAProviderOptions(cuda, keys.data, values.data, xx keys.count));
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if !ok return result, false, error;
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ok, error = ort_check(api.SessionOptionsAppendExecutionProvider_CUDA_V2(options, cuda));
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if !ok return result, false, error;
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}
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if !file_exists(path) return result, false, tprint("% is not there; run `jai fetch_models.jai` in modules/OCR and rebuild.", path);
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ok, error = ort_check(api.CreateSession(env, ort_path(path), options, *result.session));
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if !ok return result, false, error;
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allocator: *OrtAllocator;
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ort_check(api.GetAllocatorWithDefaultOptions(*allocator));
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name: *u8;
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ort_check(api.SessionGetInputName(result.session, 0, allocator, *name));
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result.input_name = to_c_string(to_string(name),, context.default_allocator);
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ort_check(api.AllocatorFree(allocator, name));
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ort_check(api.SessionGetOutputName(result.session, 0, allocator, *name));
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result.output_name = to_c_string(to_string(name),, context.default_allocator);
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ort_check(api.AllocatorFree(allocator, name));
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return result, true, "";
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}
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ocr_release_session :: (s: *Ocr_Session) {
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if s.session ort.api.ReleaseSession(s.session);
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free(s.input_name,, context.default_allocator);
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free(s.output_name,, context.default_allocator);
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s.* = .{};
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}
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// A run's output: its values stay valid until ocr_release_output.
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Ocr_Output :: struct {
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value: *OrtValue;
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data: *float;
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dims: [4] s64;
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dim_count: s64;
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}
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// Runs the model on a float tensor of shape (the session may be shared between threads).
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ocr_run :: (s: *Ocr_Session, memory_info: *OrtMemoryInfo, data: [] float, shape: [] s64) -> Ocr_Output, ok: bool, error: string {
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out: Ocr_Output;
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api := ort.api;
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input: *OrtValue;
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ok, error := ort_check(api.CreateTensorWithDataAsOrtValue(memory_info, data.data, xx (data.count * size_of(float)), shape.data, xx shape.count, .ONNX_TENSOR_ELEMENT_DATA_TYPE_FLOAT, *input));
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if !ok return out, false, error;
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defer api.ReleaseValue(input);
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ok, error = ort_check(api.Run(s.session, null, *s.input_name, *input, 1, *s.output_name, 1, *out.value));
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if !ok return out, false, error;
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raw: *void;
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ort_check(api.GetTensorMutableData(out.value, *raw));
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out.data = cast(*float) raw;
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info: *OrtTensorTypeAndShapeInfo;
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ort_check(api.GetTensorTypeAndShape(out.value, *info));
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count: u64;
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ort_check(api.GetDimensionsCount(info, *count));
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out.dim_count = min(cast(s64) count, out.dims.count);
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ort_check(api.GetDimensions(info, out.dims.data, xx out.dim_count));
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api.ReleaseTensorTypeAndShapeInfo(info);
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return out, true, "";
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}
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ocr_release_output :: (out: *Ocr_Output) {
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if out.value ort.api.ReleaseValue(out.value);
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out.* = .{};
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}
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