wfview/audiohandler.cpp

1293 wiersze
68 KiB
C++

/*
This class handles both RX and TX audio, each is created as a seperate instance of the class
but as the setup/handling if output (RX) and input (TX) devices is so similar I have combined them.
*/
#include "audiohandler.h"
#include "logcategories.h"
#define MULAW_BIAS 33
#define MULAW_MAX 0x1fff
static unsigned char ulaw_encode[8193] =
{ 0xff, 0xfe, 0xfe, 0xfd, 0xfd, 0xfc, 0xfc, 0xfb, 0xfb, 0xfa, 0xfa, 0xf9,
0xf9, 0xf8, 0xf8, 0xf7, 0xf7, 0xf6, 0xf6, 0xf5, 0xf5, 0xf4, 0xf4, 0xf3,
0xf3, 0xf2, 0xf2, 0xf1, 0xf1, 0xf0, 0xf0, 0xef, 0xef, 0xef, 0xef, 0xee,
0xee, 0xee, 0xee, 0xed, 0xed, 0xed, 0xed, 0xec, 0xec, 0xec, 0xec, 0xeb,
0xeb, 0xeb, 0xeb, 0xea, 0xea, 0xea, 0xea, 0xe9, 0xe9, 0xe9, 0xe9, 0xe8,
0xe8, 0xe8, 0xe8, 0xe7, 0xe7, 0xe7, 0xe7, 0xe6, 0xe6, 0xe6, 0xe6, 0xe5,
0xe5, 0xe5, 0xe5, 0xe4, 0xe4, 0xe4, 0xe4, 0xe3, 0xe3, 0xe3, 0xe3, 0xe2,
0xe2, 0xe2, 0xe2, 0xe1, 0xe1, 0xe1, 0xe1, 0xe0, 0xe0, 0xe0, 0xe0, 0xdf,
0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xde, 0xde, 0xde, 0xde, 0xde,
0xde, 0xde, 0xde, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdc,
0xdc, 0xdc, 0xdc, 0xdc, 0xdc, 0xdc, 0xdc, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb,
0xdb, 0xdb, 0xdb, 0xda, 0xda, 0xda, 0xda, 0xda, 0xda, 0xda, 0xda, 0xd9,
0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xd8, 0xd8, 0xd8, 0xd8, 0xd8,
0xd8, 0xd8, 0xd8, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd6,
0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd5, 0xd5, 0xd5, 0xd5, 0xd5,
0xd5, 0xd5, 0xd5, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd3,
0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd2, 0xd2, 0xd2, 0xd2, 0xd2,
0xd2, 0xd2, 0xd2, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd0,
0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf,
0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xce,
0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce,
0xce, 0xce, 0xce, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc,
0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcb,
0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb,
0xcb, 0xcb, 0xcb, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca,
0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9,
0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc8,
0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8,
0xc8, 0xc8, 0xc8, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7,
0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6,
0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc5,
0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5,
0xc5, 0xc5, 0xc5, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4,
0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3,
0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc2,
0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2,
0xc2, 0xc2, 0xc2, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0,
0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xbf,
0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe,
0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe,
0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe,
0xbe, 0xbe, 0xbe, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd,
0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd,
0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbc,
0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc,
0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc,
0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba,
0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba,
0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xb9,
0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9,
0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9,
0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8,
0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8,
0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8,
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0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6,
0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6,
0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5,
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0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb3,
0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3,
0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3,
0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2,
0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2,
0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2,
0xb2, 0xb2, 0xb2, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1,
0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1,
0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb0,
0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0,
0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0,
0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xae,
0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae,
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0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9,
0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa8,
0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
0xa8, 0xa8, 0xa8, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
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0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
0xa5, 0xa5, 0xa5, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
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0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
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0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
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0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa2,
0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
0xa2, 0xa2, 0xa2, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
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0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80
};
static const qint16 ulaw_decode[256] = {
-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, 0,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
};
audioHandler::audioHandler(QObject* parent) :
QIODevice(parent),
isInitialized(false),
audioOutput(Q_NULLPTR),
audioInput(Q_NULLPTR),
isUlaw(false),
latency(0),
isInput(0),
chunkAvailable(false)
{
}
audioHandler::~audioHandler()
{
stop();
if (audioOutput != Q_NULLPTR) {
delete audioOutput;
}
if (audioInput != Q_NULLPTR) {
delete audioInput;
}
if (resampler) {
speex_resampler_destroy(resampler);
}
}
bool audioHandler::init(const quint8 bits, const quint8 channels, const quint16 samplerate, const quint16 latency, const bool ulaw, const bool isinput, QString port, quint8 resampleQuality)
{
if (isInitialized) {
return false;
}
/* Always use 16 bit 48K samples internally*/
format.setSampleSize(16);
format.setChannelCount(channels);
format.setSampleRate(INTERNAL_SAMPLE_RATE);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);
this->latency = latency;
this->isUlaw = ulaw;
this->isInput = isinput;
this->radioSampleBits = bits;
this->radioSampleRate = samplerate;
this->radioChannels = channels;
//this->chunkSize = (INTERNAL_SAMPLE_RATE / 25) * (radioSampleBits / 8)/2;
this->chunkSize = 1920*radioChannels;
qDebug(logAudio()) << "Audio chunkSize: " << this->chunkSize;
int resample_error=0;
if (isinput) {
resampler = wf_resampler_init(radioChannels, INTERNAL_SAMPLE_RATE, samplerate, resampleQuality, &resample_error);
}
else
{
resampler = wf_resampler_init(radioChannels, samplerate, INTERNAL_SAMPLE_RATE, resampleQuality, &resample_error);
}
wf_resampler_get_ratio(resampler, &ratioNum, &ratioDen);
qDebug(logAudio()) << "wf_resampler_init() returned: " << resample_error << " ratioNum" << ratioNum << " ratioDen" << ratioDen << " input " << isinput;
qDebug(logAudio()) << "Got audio port name: " << port;
if (isInput) {
const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
for (const QAudioDeviceInfo& deviceInfo : deviceInfos) {
if (deviceInfo.deviceName() == port) {
qDebug(logAudio()) << "Input Audio Device name: " << deviceInfo.deviceName();
isInitialized = setDevice(deviceInfo);
break;
}
}
if (!isInitialized) {
qDebug(logAudio()) << "Input device " << deviceInfo.deviceName() << " not found, using default";
isInitialized = setDevice(QAudioDeviceInfo::defaultInputDevice());
}
}
else
{
const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
for (const QAudioDeviceInfo& deviceInfo : deviceInfos) {
if (deviceInfo.deviceName() == port) {
qDebug(logAudio()) << "Output Audio Device name: " << deviceInfo.deviceName();
isInitialized = setDevice(deviceInfo);
break;
}
}
if (!isInitialized) {
qDebug(logAudio()) << "Output device " << deviceInfo.deviceName() << " not found, using default";
isInitialized = setDevice(QAudioDeviceInfo::defaultOutputDevice());
}
}
return isInitialized;
}
bool audioHandler::setDevice(QAudioDeviceInfo deviceInfo)
{
bool ret = true;
qDebug(logAudio()) << this->metaObject()->className() << ": setDevice() running :" << deviceInfo.deviceName();
if (!deviceInfo.isFormatSupported(format)) {
if (deviceInfo.isNull())
{
qDebug(logAudio()) << "No audio device was found. You probably need to install libqt5multimedia-plugins.";
ret = false;
}
else {
/*
qDebug(logAudio()) << "Audio Devices found: ";
const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
for (const QAudioDeviceInfo& deviceInfo : deviceInfos)
{
qDebug(logAudio()) << "Device name: " << deviceInfo.deviceName();
qDebug(logAudio()) << "is null (probably not good):" << deviceInfo.isNull();
qDebug(logAudio()) << "channel count:" << deviceInfo.supportedChannelCounts();
qDebug(logAudio()) << "byte order:" << deviceInfo.supportedByteOrders();
qDebug(logAudio()) << "supported codecs:" << deviceInfo.supportedCodecs();
qDebug(logAudio()) << "sample rates:" << deviceInfo.supportedSampleRates();
qDebug(logAudio()) << "sample sizes:" << deviceInfo.supportedSampleSizes();
qDebug(logAudio()) << "sample types:" << deviceInfo.supportedSampleTypes();
}
qDebug(logAudio()) << "----- done with audio info -----";
*/
ret=false;
}
qDebug(logAudio()) << "Format not supported, choosing nearest supported format - which may not work!";
deviceInfo.nearestFormat(format);
}
this->deviceInfo = deviceInfo;
this->reinit();
return ret;
}
void audioHandler::reinit()
{
qDebug(logAudio()) << this->metaObject()->className() << ": reinit() running";
if (audioOutput && audioOutput->state() != QAudio::StoppedState) {
this->stop();
}
if (this->isInput)
{
// (Re)initialize audio input
if (audioInput != Q_NULLPTR)
delete audioInput;
audioInput = new QAudioInput(deviceInfo, format, this);
connect(audioInput, SIGNAL(notify()), SLOT(notified()));
connect(audioInput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
}
else {
// (Re)initialize audio output
if (audioOutput != Q_NULLPTR)
delete audioOutput;
audioOutput = Q_NULLPTR;
audioOutput = new QAudioOutput(deviceInfo, format, this);
audioOutput->setBufferSize((radioSampleRate / 25) * (radioSampleBits / 8) * 2);
connect(audioOutput, SIGNAL(notify()), SLOT(notified()));
connect(audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
}
this->start();
this->flush();
}
void audioHandler::start()
{
qDebug(logAudio()) << this->metaObject()->className() << ": start() running";
if ((audioOutput == Q_NULLPTR || audioOutput->state() != QAudio::StoppedState) &&
(audioInput == Q_NULLPTR || audioInput->state() != QAudio::StoppedState) ) {
return;
}
if (isInput) {
this->open(QIODevice::WriteOnly | QIODevice::Unbuffered);
audioInput->start(this);
}
else {
this->open(QIODevice::ReadOnly | QIODevice::Unbuffered);
audioOutput->start(this);
}
}
void audioHandler::flush()
{
qDebug(logAudio()) << this->metaObject()->className() << ": flush() running";
this->stop();
if (isInput) {
audioInput->reset();
}
else {
audioOutput->reset();
}
QMutexLocker locker(&mutex);
audioBuffer.clear();
this->start();
}
void audioHandler::stop()
{
if (audioOutput && audioOutput->state() != QAudio::StoppedState) {
// Stop audio output
audioOutput->stop();
this->close();
}
if (audioInput && audioInput->state() != QAudio::StoppedState) {
// Stop audio output
audioInput->stop();
this->close();
}
}
/// <summary>
/// This function processes the incoming audio FROM the radio and pushes it into the playback buffer *data
/// </summary>
/// <param name="data"></param>
/// <param name="maxlen"></param>
/// <returns></returns>
qint64 audioHandler::readData(char* data, qint64 maxlen)
{
// Calculate output length, always full samples
int sentlen = 0;
//qDebug(logAudio()) << "Looking for: " << maxlen << " bytes";
// We must lock the mutex for the entire time that the buffer may be modified.
QMutexLocker locker(&mutex);
// Get next packet from buffer.
if (!audioBuffer.isEmpty())
{
// Output buffer is ALWAYS 16 bit.
auto packet = audioBuffer.begin();
while (packet != audioBuffer.end() && sentlen < maxlen)
{
int timediff = packet->time.msecsTo(QTime::currentTime());
if (timediff > (int)latency * 2) {
//qDebug(logAudio()) << "Packet " << hex << packet->seq << " arrived too late (increase rx buffer size!) " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
packet = audioBuffer.erase(packet); // returns next packet
}
else if (packet->seq == lastSeq+1 || packet->seq <= lastSeq)
{
int send = qMin((int)maxlen-sentlen, packet->dataout.length() - packet->sent);
lastSeq = packet->seq;
//qDebug(logAudio()) << "Packet " << hex << packet->seq << " arrived on time " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
memcpy(data + sentlen, packet->dataout.constData() + packet->sent, send);
sentlen = sentlen + send;
if (send == packet->dataout.length())
{
//qDebug(logAudio()) << "Get next packet";
packet = audioBuffer.erase(packet); // returns next packet
}
else if (send == 0)
{
// We have no more space or no packets so just break.
break;
}
else
{
// We ended-up with a partial packet left so store where we left off.
packet->sent = send;
qDebug(logAudio()) << "Packet " << hex << packet->seq << " is partial, sent=" << dec << packet->sent << " sentlen=" << sentlen;
break;
}
} else {
qDebug(logAudio()) << "Missing audio packet(s) from: " << lastSeq + 1 << " to " << packet->seq - 1;
lastSeq = packet->seq;
}
}
}
return sentlen;
}
qint64 audioHandler::writeData(const char* data, qint64 len)
{
qint64 sentlen = 0;
QMutexLocker locker(&mutex);
audioPacket *current;
while (sentlen < len) {
if (!audioBuffer.isEmpty())
{
if (audioBuffer.last().sent == chunkSize)
{
audioBuffer.append(audioPacket());
audioBuffer.last().sent = 0;
}
}
else
{
audioBuffer.append(audioPacket());
audioBuffer.last().sent = 0;
}
current = &audioBuffer.last();
int send = qMin((int)(len - sentlen), (int)chunkSize-current->sent);
current->datain.append(QByteArray::fromRawData(data + sentlen, send ));
sentlen = sentlen + send;
current->seq = 0; // Not used in TX
current->time = QTime::currentTime();
current->sent = current->datain.length();
if (current->sent == chunkSize)
{
chunkAvailable = true;
}
else if (audioBuffer.length()==1 && current->sent != chunkSize) {
chunkAvailable = false;
}
}
return (sentlen); // Always return the same number as we received
}
qint64 audioHandler::bytesAvailable() const
{
return 0;
}
bool audioHandler::isSequential() const
{
return true;
}
void audioHandler::notified()
{
}
void audioHandler::stateChanged(QAudio::State state)
{
// Process the state
switch (state)
{
case QAudio::IdleState:
{
qDebug(logAudio()) << "Audio now in idle state: " << audioBuffer.length() << " packets in buffer";
if (audioOutput->error() == QAudio::UnderrunError)
{
qDebug(logAudio()) << this->metaObject()->className() << "RX:Buffer underrun";
audioOutput->suspend();
}
break;
}
case QAudio::ActiveState:
{
qDebug(logAudio()) << "Audio now in active state: " << audioBuffer.length() << " packets in buffer";
break;
}
case QAudio::SuspendedState:
{
qDebug(logAudio()) << "Audio now in suspended state: " << audioBuffer.length() << " packets in buffer";
break;
}
case QAudio::StoppedState:
{
qDebug(logAudio()) << "Audio now in stopped state: " << audioBuffer.length() << " packets in buffer";
break;
}
default: {
qDebug(logAudio()) << "Unhandled audio state: " << audioBuffer.length() << " packets in buffer" << state;
}
}
}
void audioHandler::incomingAudio(audioPacket data)
{
if (audioOutput != Q_NULLPTR && audioOutput->state() != QAudio::StoppedState) {
QMutexLocker locker(&mutex);
// Incoming data is 8bits?
if (radioSampleBits == 8)
{
QByteArray inPacket((int)data.datain.length() * 2, (char)0xff);
qint16* in = (qint16*)inPacket.data();
for (int f = 0; f < data.datain.length(); f++)
{
if (isUlaw)
{
in[f] = ulaw_decode[(quint8)data.datain[f]];
}
else
{
// Convert 8-bit sample to 16-bit
in[f] = (qint16)(((quint8)data.datain[f] << 8) - 32640);
}
}
data.datain = inPacket; // Replace incoming data with converted.
}
//qDebug(logAudio()) << "Adding packet to buffer:" << (*packet).seq << ": " << inPacket.length();
/* We now have an array of 16bit samples in the NATIVE samplerate of the radio
If the radio sample rate is below 48000, we need to resample.
*/
if (ratioDen != 1) {
// We need to resample
quint32 outFrames = ((data.datain.length() / 2) * ratioDen) / radioChannels;
quint32 inFrames = (data.datain.length() / 2) / radioChannels;
data.dataout.resize(outFrames * 2 * radioChannels); // Preset the output buffer size.
int err = 0;
if (this->radioChannels == 1) {
err = wf_resampler_process_int(resampler, 0, (const qint16*)data.datain.constData(), &inFrames, (qint16*)data.dataout.data(), &outFrames);
}
else {
err = wf_resampler_process_interleaved_int(resampler, (const qint16*)data.datain.constData(), &inFrames, (qint16*)data.dataout.data(), &outFrames);
}
if (err) {
qDebug(logAudio()) << "Resampler error " << err << " inFrames:" << inFrames << " outFrames:" << outFrames;
}
}
else {
data.dataout = data.datain;
}
audioBuffer.push_back(data);
// Sort the buffer by seq number. This is important and audio packets may have arrived out-of-order
std::sort(audioBuffer.begin(), audioBuffer.end(),
[](const audioPacket& a, const audioPacket& b) -> bool
{
return a.seq < b.seq;
});
// Restart playback
if (audioOutput->state() == QAudio::SuspendedState)
{
qDebug(logAudio()) << "RX Audio Suspended, Resuming...";
audioOutput->resume();
}
}
}
void audioHandler::changeLatency(const quint16 newSize)
{
qDebug(logAudio()) << this->metaObject()->className() << ": Changing latency to: " << newSize << " from " << latency;
latency = newSize;
}
void audioHandler::getLatency()
{
emit sendLatency(latency);
}
bool audioHandler::isChunkAvailable()
{
return (chunkAvailable);
}
void audioHandler::getNextAudioChunk(QByteArray& ret)
{
if (!audioBuffer.isEmpty() && chunkAvailable)
{
QMutexLocker locker(&mutex);
// Skip through audio buffer deleting any old entry.
auto packet = audioBuffer.begin();
while (packet != audioBuffer.end())
{
if (packet->time.msecsTo(QTime::currentTime()) > 100) {
//qDebug(logAudio()) << "TX Packet too old " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
packet = audioBuffer.erase(packet); // returns next packet
}
else {
if (packet->datain.length() == chunkSize && ret.length() == 0)
{
/* We now have an array of samples in the computer native format (48000)
If the radio sample rate is below 48000, we need to resample.
*/
if (ratioNum != 1)
{
// We need to resample (we are STILL 16 bit!)
quint32 outFrames = ((packet->datain.length() / 2) / ratioNum) / radioChannels;
quint32 inFrames = (packet->datain.length() / 2) / radioChannels;
packet->dataout.resize(outFrames * 2 * radioChannels); // Preset the output buffer size.
int err = 0;
if (this->radioChannels == 1) {
err = wf_resampler_process_int(resampler, 0, (const qint16*)packet->datain.constData(), &inFrames, (qint16*)packet->dataout.data(), &outFrames);
}
else {
err = wf_resampler_process_interleaved_int(resampler, (const qint16*)packet->datain.constData(), &inFrames, (qint16*)packet->dataout.data(), &outFrames);
}
if (err) {
qDebug(logAudio()) << "Resampler error " << err << " inFrames:" << inFrames << " outFrames:" << outFrames;
}
//qDebug(logAudio()) << "Resampler run " << err << " inFrames:" << inFrames << " outFrames:" << outFrames;
//qDebug(logAudio()) << "Resampler run inLen:" << packet->datain.length() << " outLen:" << packet->dataout.length();
if (radioSampleBits == 8)
{
packet->datain = packet->dataout; // Copy packet back to input buffer.
}
}
else if (radioSampleBits == 16 ){
// Only copy buffer if radioSampleBits is 16, as it will be handled below otherwise.
packet->dataout = packet->datain;
}
// Do we need to convert 16-bit to 8-bit?
if (radioSampleBits == 8) {
packet->dataout.resize(packet->datain.length() / 2);
qint16* in = (qint16*)packet->datain.data();
for (int f = 0; f < packet->dataout.length(); f++)
{
quint8 outdata = 0;
if (isUlaw) {
qint16 enc = qFromLittleEndian<quint16>(in + f);
if (enc >= 0)
outdata = ulaw_encode[enc];
else
outdata = 0x7f & ulaw_encode[-enc];
}
else {
outdata = (quint8)(((qFromLittleEndian<qint16>(in + f) >> 8) ^ 0x80) & 0xff);
}
packet->dataout[f] = (char)outdata;
f++;
}
}
ret.append(packet->dataout);
packet = audioBuffer.erase(packet); // returns next packet
}
else {
packet++;
}
}
}
}
return;
}