Add Chromium-only Blender WebEngine parity work

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

@@ -0,0 +1,176 @@
+/*******************************************************************************
+ * 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.
+ ******************************************************************************/
+
+#include "SndFileReader.h"
+#include "util/Buffer.h"
+#include "Exception.h"
+
+#include <cstring>
+
+AUD_NAMESPACE_BEGIN
+
+sf_count_t SndFileReader::vio_get_filelen(void* user_data)
+{
+	SndFileReader* reader = (SndFileReader*)user_data;
+	return reader->m_membuffer->getSize();
+}
+
+sf_count_t SndFileReader::vio_seek(sf_count_t offset, int whence,
+									   void* user_data)
+{
+	SndFileReader* reader = (SndFileReader*)user_data;
+
+	switch(whence)
+	{
+	case SEEK_SET:
+		reader->m_memoffset = offset;
+		break;
+	case SEEK_CUR:
+		reader->m_memoffset = reader->m_memoffset + offset;
+		break;
+	case SEEK_END:
+		reader->m_memoffset = reader->m_membuffer->getSize() + offset;
+		break;
+	}
+
+	return reader->m_memoffset;
+}
+
+sf_count_t SndFileReader::vio_read(void* ptr, sf_count_t count,
+									   void* user_data)
+{
+	SndFileReader* reader = (SndFileReader*)user_data;
+
+	if(reader->m_memoffset + count > reader->m_membuffer->getSize())
+		count = reader->m_membuffer->getSize() - reader->m_memoffset;
+
+	std::memcpy(ptr, ((data_t*)reader->m_membuffer->getBuffer()) +
+		   reader->m_memoffset, count);
+	reader->m_memoffset += count;
+
+	return count;
+}
+
+sf_count_t SndFileReader::vio_tell(void* user_data)
+{
+	SndFileReader* reader = (SndFileReader*)user_data;
+
+	return reader->m_memoffset;
+}
+
+SndFileReader::SndFileReader(const std::string &filename) :
+	m_position(0)
+{
+	SF_INFO sfinfo;
+
+	sfinfo.format = 0;
+	m_sndfile = sf_open(filename.c_str(), SFM_READ, &sfinfo);
+
+	if(!m_sndfile)
+		AUD_THROW(FileException, "The file couldn't be opened with libsndfile.");
+
+	m_specs.channels = (Channels) sfinfo.channels;
+	m_specs.rate = (SampleRate) sfinfo.samplerate;
+	m_length = sfinfo.frames;
+	m_seekable = sfinfo.seekable;
+}
+
+SndFileReader::SndFileReader(std::shared_ptr<Buffer> buffer) :
+	m_position(0),
+	m_membuffer(buffer),
+	m_memoffset(0)
+{
+	m_vio.get_filelen = vio_get_filelen;
+	m_vio.read = vio_read;
+	m_vio.seek = vio_seek;
+	m_vio.tell = vio_tell;
+	m_vio.write = nullptr;
+
+	SF_INFO sfinfo;
+
+	sfinfo.format = 0;
+	m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &sfinfo, this);
+
+	if(!m_sndfile)
+		AUD_THROW(FileException, "The buffer couldn't be read with libsndfile.");
+
+	m_specs.channels = (Channels) sfinfo.channels;
+	m_specs.rate = (SampleRate) sfinfo.samplerate;
+	m_length = sfinfo.frames;
+	m_seekable = sfinfo.seekable;
+}
+
+SndFileReader::~SndFileReader()
+{
+	sf_close(m_sndfile);
+}
+
+std::vector<StreamInfo> SndFileReader::queryStreams()
+{
+	std::vector<StreamInfo> result;
+
+	StreamInfo info;
+	info.start = 0;
+	info.duration = double(getLength()) / m_specs.rate;
+	info.specs.specs = m_specs;
+	info.specs.format = FORMAT_FLOAT32;
+
+	result.emplace_back(info);
+
+	return result;
+}
+
+bool SndFileReader::isSeekable() const
+{
+	return m_seekable;
+}
+
+void SndFileReader::seek(int position)
+{
+	if(m_seekable)
+	{
+		position = sf_seek(m_sndfile, position, SEEK_SET);
+		m_position = position;
+	}
+}
+
+int SndFileReader::getLength() const
+{
+	return m_length;
+}
+
+int SndFileReader::getPosition() const
+{
+	return m_position;
+}
+
+Specs SndFileReader::getSpecs() const
+{
+	return m_specs;
+}
+
+void SndFileReader::read(int& length, bool& eos, sample_t* buffer)
+{
+	int olen = length;
+
+	length = sf_readf_float(m_sndfile, buffer, length);
+
+	m_position += length;
+
+	eos = length < olen;
+}
+
+AUD_NAMESPACE_END