92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
#ifndef _ATRAC3PLUS_DECODER_
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#define _ATRAC3PLUS_DECODER_
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namespace Atrac3plus_Decoder {
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bool IsSupported();
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bool IsInstalled();
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bool CanAutoInstall();
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bool DoAutoInstall();
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std::string GetInstalledFilename();
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int Init();
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int Shutdown();
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typedef void* Context;
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Context OpenContext();
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int CloseContext(Context *context);
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bool Decode(Context context, void* inbuf, int inbytes, int *outbytes, void* outbuf);
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struct BufferQueue {
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BufferQueue(int size = 0x20000) {
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bufQueue = 0;
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alloc(size);
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}
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~BufferQueue() {
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if (bufQueue)
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delete [] bufQueue;
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}
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bool alloc(int size) {
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if (size < 0)
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return false;
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if (bufQueue)
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delete [] bufQueue;
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bufQueue = new unsigned char[size];
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start = 0;
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end = 0;
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bufQueueSize = size;
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return true;
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}
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void clear() {
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start = 0;
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end = 0;
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}
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inline int getQueueSize() {
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return (end + bufQueueSize - start) % bufQueueSize;
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}
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bool push(unsigned char *buf, int addsize) {
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int queuesz = getQueueSize();
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int space = bufQueueSize - queuesz;
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if (space < addsize || addsize < 0)
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return false;
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if (end + addsize <= bufQueueSize) {
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memcpy(bufQueue + end, buf, addsize);
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} else {
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int size = bufQueueSize - end;
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memcpy(bufQueue + end, buf, size);
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memcpy(bufQueue, buf + size, addsize - size);
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}
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end = (end + addsize) % bufQueueSize;
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return true;
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}
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int pop_front(unsigned char *buf, int wantedsize) {
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if (wantedsize <= 0)
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return 0;
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int bytesgot = getQueueSize();
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if (wantedsize < bytesgot)
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bytesgot = wantedsize;
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if (start + bytesgot <= bufQueueSize) {
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memcpy(buf, bufQueue + start, bytesgot);
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} else {
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int size = bufQueueSize - start;
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memcpy(buf, bufQueue + start, size);
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memcpy(buf + size, bufQueue, bytesgot - size);
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}
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start = (start + bytesgot) % bufQueueSize;
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return bytesgot;
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}
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unsigned char* bufQueue;
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int start, end;
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int bufQueueSize;
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};
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}
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#endif // _ATRAC3PLUS_DECODER_
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