Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/plugins/ffmpeg/FFMPEGWriter.h

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+/*******************************************************************************
+ * Copyright 2009-2024 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
+
+#ifdef FFMPEG_PLUGIN
+#define AUD_BUILD_PLUGIN
+#endif
+
+/**
+ * @file FFMPEGWriter.h
+ * @ingroup plugin
+ * The FFMPEGWriter class.
+ */
+
+#include "respec/ConverterFunctions.h"
+#include "util/Buffer.h"
+#include "file/IWriter.h"
+
+#include <string>
+
+struct AVCodecContext;
+extern "C" {
+#include <libavformat/avformat.h>
+}
+
+AUD_NAMESPACE_BEGIN
+
+/**
+ * This class writes a sound file via ffmpeg.
+ */
+class AUD_PLUGIN_API FFMPEGWriter : public IWriter
+{
+private:
+	/**
+	 * The current position in samples.
+	 */
+	int m_position;
+
+	/**
+	 * The specification of the audio data.
+	 */
+	DeviceSpecs m_specs;
+
+	/**
+	 * The AVFormatContext structure for using ffmpeg.
+	 */
+	AVFormatContext* m_formatCtx;
+
+	/**
+	 * The AVCodecContext structure for using ffmpeg.
+	 */
+	AVCodecContext* m_codecCtx;
+
+	/**
+	 * The AVStream structure for using ffmpeg.
+	 */
+	AVStream* m_stream;
+
+	/**
+	 * The AVPacket structure for using ffmpeg.
+	 */
+	AVPacket* m_packet;
+
+	/**
+	 * The AVFrame structure for using ffmpeg.
+	 */
+	AVFrame* m_frame;
+
+	/**
+	 * The input buffer for the format converted data before encoding.
+	 */
+	Buffer m_input_buffer;
+
+	/**
+	 * The buffer used for deinterleaving.
+	 */
+	Buffer m_deinterleave_buffer;
+
+	/**
+	 * The count of input samples we have so far.
+	 */
+	unsigned int m_input_samples;
+
+	/**
+	 * The count of input samples necessary to encode a packet.
+	 */
+	unsigned int m_input_size;
+
+	/**
+	 * Whether the ouput has to be deinterleaved before writing.
+	 */
+	bool m_deinterleave;
+
+	/**
+	 * Converter function.
+	 */
+	convert_f m_convert;
+
+	// delete copy constructor and operator=
+	FFMPEGWriter(const FFMPEGWriter&) = delete;
+	FFMPEGWriter& operator=(const FFMPEGWriter&) = delete;
+
+	/**
+	 * Encodes to the output buffer.
+	 */
+	AUD_LOCAL void encode();
+
+	/**
+	 * Finishes writing to the file.
+	 */
+	AUD_LOCAL void close();
+
+public:
+	/**
+	 * Creates a new writer.
+	 * \param filename The path to the file to be read.
+	 * \param specs The file's audio specification.
+	 * \param format The file's container format.
+	 * \param codec The codec used for encoding the audio data.
+	 * \param bitrate The bitrate for encoding.
+	 * \exception Exception Thrown if the file specified does not exist or
+	 *            cannot be read with ffmpeg.
+	 */
+	FFMPEGWriter(const std::string &filename, DeviceSpecs specs, Container format, Codec codec, unsigned int bitrate);
+
+	/**
+	 * Destroys the writer and closes the file.
+	 */
+	virtual ~FFMPEGWriter();
+
+	virtual int getPosition() const;
+	virtual DeviceSpecs getSpecs() const;
+	virtual void write(unsigned int length, sample_t* buffer);
+};
+
+AUD_NAMESPACE_END