mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-29 01:06:05 +00:00
98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
#include "mp4_ulaw_decoder.h"
|
|
|
|
static int16_t MuLawDecompressTable[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
|
|
};
|
|
|
|
MP4ulawDecoder::MP4ulawDecoder()
|
|
{
|
|
}
|
|
int MP4ulawDecoder::Open()
|
|
{
|
|
return MP4_SUCCESS;
|
|
}
|
|
void MP4ulawDecoder::Close()
|
|
{
|
|
}
|
|
int MP4ulawDecoder::GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample)
|
|
{
|
|
// TODO
|
|
*channels = 1;
|
|
*bitsPerSample = 16;
|
|
return MP4_SUCCESS;
|
|
}
|
|
|
|
int MP4ulawDecoder::DecodeSample(void *inputBuffer, size_t inputBufferBytes, void *outputBuffer, size_t *outputBufferBytes)
|
|
{
|
|
const uint8_t *in = (const uint8_t *)inputBuffer;
|
|
*outputBufferBytes=0;
|
|
int16_t *out = (int16_t *)outputBuffer;
|
|
while (inputBufferBytes--)
|
|
{
|
|
*outputBufferBytes = *outputBufferBytes + 2;
|
|
*out++ = MuLawDecompressTable[*in++];
|
|
}
|
|
return MP4_SUCCESS;
|
|
}
|
|
|
|
int MP4ulawDecoder::CanHandleCodec(const char *codecName)
|
|
{
|
|
return !strcmp(codecName, "ulaw");
|
|
}
|
|
|
|
int MP4ulawDecoder::RequireChunks()
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#define CBCLASS MP4ulawDecoder
|
|
START_DISPATCH;
|
|
CB(MPEG4_AUDIO_OPEN, Open)
|
|
//CB(MPEG4_AUDIO_OPEN_EX, OpenEx)
|
|
//CB(MPEG4_AUDIO_ASC, AudioSpecificConfiguration)
|
|
//CB(MPEG4_AUDIO_BITRATE, GetCurrentBitrate)
|
|
//CB(MPEG4_AUDIO_FRAMESIZE, OutputFrameSize)
|
|
CB(MPEG4_AUDIO_OUTPUTINFO, GetOutputProperties)
|
|
//CB(MPEG4_AUDIO_OUTPUTINFO_EX, GetOutputPropertiesEx)
|
|
CB(MPEG4_AUDIO_DECODE, DecodeSample)
|
|
//VCB(MPEG4_AUDIO_FLUSH, Flush)
|
|
VCB(MPEG4_AUDIO_CLOSE, Close)
|
|
CB(MPEG4_AUDIO_HANDLES_CODEC, CanHandleCodec)
|
|
//CB(MPEG4_AUDIO_HANDLES_TYPE, CanHandleType)
|
|
//CB(MPEG4_AUDIO_HANDLES_MPEG4_TYPE, CanHandleMPEG4Type)
|
|
//CB(MPEG4_AUDIO_SET_GAIN, SetGain)
|
|
CB(MPEG4_AUDIO_REQUIRE_CHUNKS, RequireChunks)
|
|
END_DISPATCH;
|
|
#undef CBCLASS |