Repo created

TMessagesProj/jni/voip/tgcalls/group/AVIOContextImpl.cpp

@@ -0,0 +1,64 @@
+#include "AVIOContextImpl.h"
+
+#include "rtc_base/logging.h"
+#include "rtc_base/third_party/base64/base64.h"
+#include "api/video/i420_buffer.h"
+
+#include <string>
+#include <set>
+#include <map>
+
+namespace tgcalls {
+
+namespace {
+
+int AVIOContextImplRead(void *opaque, unsigned char *buffer, int bufferSize) {
+    AVIOContextImpl *instance = static_cast<AVIOContextImpl *>(opaque);
+
+    int bytesToRead = std::min(bufferSize, ((int)instance->_fileData.size()) - instance->_fileReadPosition);
+    if (bytesToRead < 0) {
+        bytesToRead = 0;
+    }
+
+    if (bytesToRead > 0) {
+        memcpy(buffer, instance->_fileData.data() + instance->_fileReadPosition, bytesToRead);
+        instance->_fileReadPosition += bytesToRead;
+
+        return bytesToRead;
+    } else {
+        return AVERROR_EOF;
+    }
+}
+
+int64_t AVIOContextImplSeek(void *opaque, int64_t offset, int whence) {
+    AVIOContextImpl *instance = static_cast<AVIOContextImpl *>(opaque);
+
+    if (whence == 0x10000) {
+        return (int64_t)instance->_fileData.size();
+    } else {
+        int64_t seekOffset = std::min(offset, (int64_t)instance->_fileData.size());
+        if (seekOffset < 0) {
+            seekOffset = 0;
+        }
+        instance->_fileReadPosition = (int)seekOffset;
+        return seekOffset;
+    }
+}
+
+}
+
+AVIOContextImpl::AVIOContextImpl(std::vector<uint8_t> &&fileData) :
+_fileData(std::move(fileData)) {
+    _buffer.resize(4 * 1024);
+    _context = avio_alloc_context(_buffer.data(), (int)_buffer.size(), 0, this, &AVIOContextImplRead, NULL, &AVIOContextImplSeek);
+}
+
+AVIOContextImpl::~AVIOContextImpl() {
+    avio_context_free(&_context);
+}
+
+AVIOContext *AVIOContextImpl::getContext() const {
+    return _context;
+};
+
+}