deploy: current vibn theia state

Made-with: Cursor

dev-packages/ffmpeg/native/ffmpeg.c

@@ -0,0 +1,146 @@
+// *****************************************************************************
+// Copyright (C) 2019 Ericsson and others.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License v. 2.0 which is available at
+// http://www.eclipse.org/legal/epl-2.0.
+//
+// This Source Code may also be made available under the following Secondary
+// Licenses when the conditions for such availability set forth in the Eclipse
+// Public License v. 2.0 are satisfied: GNU General Public License, version 2
+// with the GNU Classpath Exception which is available at
+// https://www.gnu.org/software/classpath/license.html.
+//
+// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
+// *****************************************************************************
+
+/**
+ * https://nodejs.org/docs/latest-v10.x/api/n-api.html#n_api_n_api
+ */
+#include <node_api.h>
+
+#include <string.h>
+
+#include "ffmpeg.h"
+
+/**
+ * Return the list of codecs registered in the FFMPEG library.
+ */
+napi_value codecs(napi_env env, napi_callback_info info)
+{
+    // We will reuse this `status` for all napi calls.
+    napi_status status;
+    char *error = NULL;
+
+    // Get arguments.
+    size_t argc = 1;
+    napi_value argv[1];
+    status = napi_get_cb_info(env, info, &argc, argv, NULL, NULL);
+    if (status != napi_ok || argc < 1)
+    {
+        error = "invalid arguments";
+        goto error;
+    }
+
+    // Get first argument as string.
+    char path[2048];
+    status = napi_get_value_string_utf8(env, argv[0], path, 2048, NULL);
+    if (status != napi_ok)
+    {
+        error = "invalid string argument";
+        goto error;
+    }
+
+    // Load ffmpeg based on the provided path.
+    struct FFMPEG_Library ffmpeg = NULL_FFMPEG_LIBRARY;
+    char *load_error = load_ffmpeg_library(&ffmpeg, path);
+    if (load_error != NULL)
+    {
+        error = load_error;
+        goto error;
+    }
+
+    // Create the JavaScript list that will be returned.
+    napi_value codecs;
+    status = napi_create_array(env, &codecs);
+    if (status != napi_ok)
+    {
+        error = "napi_create_array fail";
+        goto error;
+    }
+
+    // Iterate over the codec descriptions.
+    // It includes descriptions for codecs that may not be present in the library.
+    struct AVCodecDescriptor *descriptor = ffmpeg.avcodec_descriptor_next(NULL);
+    while (descriptor != NULL)
+    {
+        // Try to fetch the codec being described, returns null on missing codecs.
+        struct AVCodec *decoder = ffmpeg.avcodec_find_decoder(descriptor->id);
+        if (decoder != NULL)
+        {
+            // Create the codec object and assign the properties.
+            napi_value object, value;
+            napi_create_object(env, &object);
+
+            // id: number
+            napi_create_int32(env, decoder->id, &value);
+            napi_set_named_property(env, object, "id", value);
+
+            // name: string
+            napi_create_string_utf8(env, decoder->name, strlen(decoder->name), &value);
+            napi_set_named_property(env, object, "name", value);
+
+            // longName: string
+            napi_create_string_utf8(env, decoder->long_name, strlen(decoder->long_name), &value);
+            napi_set_named_property(env, object, "longName", value);
+
+            // Pushing into a JS array requires calling the JS method for that.
+            napi_value push_fn;
+            napi_get_named_property(env, codecs, "push", &push_fn);
+            napi_call_function(env, codecs, push_fn, 1, (napi_value[]){object}, NULL);
+        }
+        descriptor = ffmpeg.avcodec_descriptor_next(descriptor);
+    }
+
+    // Free the ffmpeg library.
+    char *unload_error = unload_ffmpeg_library(&ffmpeg);
+    if (unload_error != NULL)
+    {
+        error = unload_error;
+        goto error;
+    }
+
+    return codecs;
+
+error:
+    if (error != NULL)
+    {
+        napi_throw_error(env, NULL, error);
+    }
+    return NULL;
+}
+
+/**
+ * https://nodejs.org/docs/latest-v10.x/api/n-api.html#n_api_module_registration
+ */
+napi_value initialize(napi_env env, napi_value exports)
+{
+    napi_status status;
+    napi_value function_codecs;
+
+    status = napi_create_function(env, NULL, 0, codecs, NULL, &function_codecs);
+    if (status != napi_ok)
+    {
+        return NULL;
+    }
+
+    status = napi_set_named_property(env, exports, "codecs", function_codecs);
+    if (status != napi_ok)
+    {
+        return NULL;
+    }
+
+    return exports;
+}
+
+NAPI_MODULE(NODE_GYP_MODULE_NAME, initialize);