#include "AMRAudioRTPSource.hh"#include "MultiFramedRTPSource.hh"#include "BitVector.hh"#include <string.h>#include <stdlib.h>Include dependency graph for AMRAudioRTPSource.cpp:
Go to the source code of this file.
Data Structures | |
| class | RawAMRRTPSource |
| class | AMRDeinterleaver |
| class | AMRBufferedPacket |
| class | AMRBufferedPacketFactory |
| class | AMRDeinterleavingBuffer |
| class | AMRDeinterleavingBuffer::FrameDescriptor |
Defines | |
| #define | MAX_NUM_CHANNELS 20 |
| #define | MAX_INTERLEAVING_GROUP_SIZE 1000 |
| #define | FT_SPEECH_LOST 14 |
| #define | FT_NO_DATA 15 |
| #define | FT_INVALID 65535 |
| #define | AMR_MAX_FRAME_SIZE 60 |
Functions | |
| static void | unpackBandwidthEfficientData (BufferedPacket *packet, Boolean isWideband) |
Variables | |
| static unsigned short const | frameBytesFromFT [16] |
| static unsigned short const | frameBytesFromFTWideband [16] |
| static unsigned const | uSecsPerFrame = 20000 |
| static unsigned short const | frameBitsFromFT [16] |
| static unsigned short const | frameBitsFromFTWideband [16] |
| #define AMR_MAX_FRAME_SIZE 60 |
Definition at line 378 of file AMRAudioRTPSource.cpp.
Referenced by AMRDeinterleavingBuffer::inputBufferSize().
| #define FT_INVALID 65535 |
Definition at line 328 of file AMRAudioRTPSource.cpp.
| #define FT_NO_DATA 15 |
Definition at line 226 of file AMRAudioRTPSource.cpp.
Referenced by AMRDeinterleavingBuffer::deliverIncomingFrame(), RawAMRRTPSource::processSpecialHeader(), and AMRDeinterleavingBuffer::retrieveFrame().
| #define FT_SPEECH_LOST 14 |
Definition at line 225 of file AMRAudioRTPSource.cpp.
Referenced by RawAMRRTPSource::processSpecialHeader().
| #define MAX_INTERLEAVING_GROUP_SIZE 1000 |
| #define MAX_NUM_CHANNELS 20 |
| static void unpackBandwidthEfficientData | ( | BufferedPacket * | packet, | |
| Boolean | isWideband | |||
| ) | [static] |
Definition at line 688 of file AMRAudioRTPSource.cpp.
References frameBitsFromFT, frameBitsFromFTWideband, and shiftBits().
Referenced by RawAMRRTPSource::processSpecialHeader().
00689 { 00690 #ifdef DEBUG 00691 fprintf(stderr, "Unpacking 'bandwidth-efficient' payload (%d bytes):\n", packet->dataSize()); 00692 for (unsigned j = 0; j < packet->dataSize(); ++j) { 00693 fprintf(stderr, "%02x:", (packet->data())[j]); 00694 } 00695 fprintf(stderr, "\n"); 00696 #endif 00697 BitVector fromBV(packet->data(), 0, 8*packet->dataSize()); 00698 00699 unsigned const toBufferSize = 2*packet->dataSize(); // conservatively large 00700 unsigned char* toBuffer = new unsigned char[toBufferSize]; 00701 unsigned toCount = 0; 00702 00703 // Begin with the payload header: 00704 unsigned CMR = fromBV.getBits(4); 00705 toBuffer[toCount++] = CMR << 4; 00706 00707 // Then, run through and unpack the TOC entries: 00708 while (1) { 00709 unsigned toc = fromBV.getBits(6); 00710 toBuffer[toCount++] = toc << 2; 00711 00712 if ((toc&0x20) == 0) break; // the F bit is 0 00713 } 00714 00715 // Then, using the TOC data, unpack each frame payload: 00716 unsigned const tocSize = toCount - 1; 00717 for (unsigned i = 1; i <= tocSize; ++i) { 00718 unsigned char tocByte = toBuffer[i]; 00719 unsigned char const FT = (tocByte&0x78) >> 3; 00720 unsigned short frameSizeBits 00721 = isWideband ? frameBitsFromFTWideband[FT] : frameBitsFromFT[FT]; 00722 unsigned short frameSizeBytes = (frameSizeBits+7)/8; 00723 00724 shiftBits(&toBuffer[toCount], 0, // to 00725 packet->data(), fromBV.curBitIndex(), // from 00726 frameSizeBits // num bits 00727 ); 00728 #ifdef DEBUG 00729 if (frameSizeBits > fromBV.numBitsRemaining()) { 00730 fprintf(stderr, "\tWarning: Unpacking frame %d of %d: want %d bits, but only %d are available!\n", i, tocSize, frameSizeBits, fromBV.numBitsRemaining()); 00731 } 00732 #endif 00733 fromBV.skipBits(frameSizeBits); 00734 toCount += frameSizeBytes; 00735 } 00736 00737 #ifdef DEBUG 00738 if (fromBV.numBitsRemaining() > 7) { 00739 fprintf(stderr, "\tWarning: %d bits remain unused!\n", fromBV.numBitsRemaining()); 00740 } 00741 #endif 00742 00743 // Finally, replace the current packet data with the unpacked data: 00744 packet->removePadding(packet->dataSize()); // throws away current packet data 00745 packet->appendData(toBuffer, toCount); 00746 delete[] toBuffer; 00747 }
unsigned short const frameBitsFromFT[16] [static] |
Initial value:
{
95, 103, 118, 134,
148, 159, 204, 244,
39, 0, 0, 0,
0, 0, 0, 0
}
Definition at line 675 of file AMRAudioRTPSource.cpp.
Referenced by unpackBandwidthEfficientData().
unsigned short const frameBitsFromFTWideband[16] [static] |
Initial value:
{
132, 177, 253, 285,
317, 365, 397, 461,
477, 40, 0, 0,
0, 0, 0, 0
}
Definition at line 681 of file AMRAudioRTPSource.cpp.
Referenced by unpackBandwidthEfficientData().
unsigned short const frameBytesFromFT[16] [static] |
Initial value:
{
12, 13, 15, 17,
19, 20, 26, 31,
5, FT_INVALID, FT_INVALID, FT_INVALID,
FT_INVALID, FT_INVALID, FT_INVALID, 0
}
Definition at line 329 of file AMRAudioRTPSource.cpp.
Referenced by AMRBufferedPacket::nextEnclosedFrameSize().
unsigned short const frameBytesFromFTWideband[16] [static] |
Initial value:
{
17, 23, 32, 36,
40, 46, 50, 58,
60, 5, FT_INVALID, FT_INVALID,
FT_INVALID, FT_INVALID, 0, 0
}
Definition at line 335 of file AMRAudioRTPSource.cpp.
Referenced by AMRBufferedPacket::nextEnclosedFrameSize().
unsigned const uSecsPerFrame = 20000 [static] |
Definition at line 450 of file AMRAudioRTPSource.cpp.
Referenced by QCELPDeinterleavingBuffer::deliverIncomingFrame(), AMRDeinterleavingBuffer::deliverIncomingFrame(), QCELPDeinterleaver::doGetNextFrame(), AMRDeinterleaver::doGetNextFrame(), QCELPDeinterleavingBuffer::retrieveFrame(), and AMRDeinterleavingBuffer::retrieveFrame().
1.5.2