65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
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#include "AVIOContextImpl.h"
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#include "rtc_base/logging.h"
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#include "rtc_base/third_party/base64/base64.h"
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#include "api/video/i420_buffer.h"
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#include <string>
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#include <set>
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#include <map>
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namespace tgcalls {
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namespace {
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int AVIOContextImplRead(void *opaque, unsigned char *buffer, int bufferSize) {
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AVIOContextImpl *instance = static_cast<AVIOContextImpl *>(opaque);
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int bytesToRead = std::min(bufferSize, ((int)instance->_fileData.size()) - instance->_fileReadPosition);
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if (bytesToRead < 0) {
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bytesToRead = 0;
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}
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if (bytesToRead > 0) {
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memcpy(buffer, instance->_fileData.data() + instance->_fileReadPosition, bytesToRead);
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instance->_fileReadPosition += bytesToRead;
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return bytesToRead;
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} else {
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return AVERROR_EOF;
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}
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}
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int64_t AVIOContextImplSeek(void *opaque, int64_t offset, int whence) {
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AVIOContextImpl *instance = static_cast<AVIOContextImpl *>(opaque);
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if (whence == 0x10000) {
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return (int64_t)instance->_fileData.size();
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} else {
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int64_t seekOffset = std::min(offset, (int64_t)instance->_fileData.size());
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if (seekOffset < 0) {
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seekOffset = 0;
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}
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instance->_fileReadPosition = (int)seekOffset;
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return seekOffset;
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}
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}
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}
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AVIOContextImpl::AVIOContextImpl(std::vector<uint8_t> &&fileData) :
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_fileData(std::move(fileData)) {
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_buffer.resize(4 * 1024);
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_context = avio_alloc_context(_buffer.data(), (int)_buffer.size(), 0, this, &AVIOContextImplRead, NULL, &AVIOContextImplSeek);
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}
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AVIOContextImpl::~AVIOContextImpl() {
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av_free(_context);
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}
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AVIOContext *AVIOContextImpl::getContext() const {
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return _context;
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};
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}
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