Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/plugins/libsndfile/SndFileReader.h

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+/*******************************************************************************
+ * Copyright 2009-2016 Jörg Müller
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+#pragma once
+
+#include "IReader.h"
+
+#ifdef LIBSNDFILE_PLUGIN
+#define AUD_BUILD_PLUGIN
+#endif
+
+/**
+ * @file SndFileReader.h
+ * @ingroup plugin
+ * The SndFileReader class.
+ */
+
+#include "file/FileInfo.h"
+
+#include <string>
+#include <sndfile.h>
+#include <memory>
+#include <vector>
+
+AUD_NAMESPACE_BEGIN
+
+class Buffer;
+
+/**
+ * This class reads a sound file via libsndfile.
+ */
+class AUD_PLUGIN_API SndFileReader : public IReader
+{
+private:
+	/**
+	 * The current position in samples.
+	 */
+	int m_position;
+
+	/**
+	 * The sample count in the file.
+	 */
+	int m_length;
+
+	/**
+	 * Whether the file is seekable.
+	 */
+	bool m_seekable;
+
+	/**
+	 * The specification of the audio data.
+	 */
+	Specs m_specs;
+
+	/**
+	 * The sndfile.
+	 */
+	SNDFILE* m_sndfile;
+
+	/**
+	 * The virtual IO structure for memory file reading.
+	 */
+	SF_VIRTUAL_IO m_vio;
+
+	/**
+	 * The pointer to the memory file.
+	 */
+	std::shared_ptr<Buffer> m_membuffer;
+
+	/**
+	 * The current reading pointer of the memory file.
+	 */
+	int m_memoffset;
+
+	// Functions for libsndfile virtual IO functionality
+	AUD_LOCAL static sf_count_t vio_get_filelen(void* user_data);
+	AUD_LOCAL static sf_count_t vio_seek(sf_count_t offset, int whence, void* user_data);
+	AUD_LOCAL static sf_count_t vio_read(void* ptr, sf_count_t count, void* user_data);
+	AUD_LOCAL static sf_count_t vio_tell(void* user_data);
+
+	// delete copy constructor and operator=
+	SndFileReader(const SndFileReader&) = delete;
+	SndFileReader& operator=(const SndFileReader&) = delete;
+
+public:
+	/**
+	 * Creates a new reader.
+	 * \param filename The path to the file to be read.
+	 * \param stream The index of the audio stream within the file if it contains multiple audio streams.
+	 * \exception Exception Thrown if the file specified does not exist or
+	 *            cannot be read with libsndfile.
+	 */
+	SndFileReader(const std::string &filename);
+
+	/**
+	 * Creates a new reader.
+	 * \param buffer The buffer to read from.
+	 * \param stream The index of the audio stream within the file if it contains multiple audio streams.
+	 * \exception Exception Thrown if the buffer specified cannot be read
+	 *                          with libsndfile.
+	 */
+	SndFileReader(std::shared_ptr<Buffer> buffer);
+
+	/**
+	 * Destroys the reader and closes the file.
+	 */
+	virtual ~SndFileReader();
+
+	/**
+	 * Queries the streams of a sound file.
+	 * \return A vector with as many streams as there are in the file.
+	 * \exception Exception Thrown if the file specified cannot be read.
+	 */
+	virtual std::vector<StreamInfo> queryStreams();
+
+	virtual bool isSeekable() const;
+	virtual void seek(int position);
+	virtual int getLength() const;
+	virtual int getPosition() const;
+	virtual Specs getSpecs() const;
+	virtual void read(int& length, bool& eos, sample_t* buffer);
+};
+
+AUD_NAMESPACE_END