📄 sdppyldinfo.cpp
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/* ***** BEGIN LICENSE BLOCK *****
* Source last modified: $Id: sdppyldinfo.cpp,v 1.2.32.1 2004/07/09 02:05:16 hubbe Exp $
*
* Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
*
* The contents of this file, and the files included with this file,
* are subject to the current version of the RealNetworks Public
* Source License (the "RPSL") available at
* http://www.helixcommunity.org/content/rpsl unless you have licensed
* the file under the current version of the RealNetworks Community
* Source License (the "RCSL") available at
* http://www.helixcommunity.org/content/rcsl, in which case the RCSL
* will apply. You may also obtain the license terms directly from
* RealNetworks. You may not use this file except in compliance with
* the RPSL or, if you have a valid RCSL with RealNetworks applicable
* to this file, the RCSL. Please see the applicable RPSL or RCSL for
* the rights, obligations and limitations governing use of the
* contents of the file.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL") in which case the provisions of the GPL are applicable
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* this file only under the terms of the GPL, and not to allow others
* to use your version of this file under the terms of either the RPSL
* or RCSL, indicate your decision by deleting the provisions above
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* use your version of this file under the terms of any one of the
* RPSL, the RCSL or the GPL.
*
* This file is part of the Helix DNA Technology. RealNetworks is the
* developer of the Original Code and owns the copyrights in the
* portions it created.
*
* This file, and the files included with this file, is distributed
* and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
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* Contributor(s):
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* ***** END LICENSE BLOCK ***** */
#include "hxtypes.h"
#include "hxassert.h"
#include "hlxclib/string.h"
#include "rtptypes.h"
/****************************************************************************
* Defines
*/
#define RTP_PAYLOAD_MAP_SIZE 35
#define RTP_BAD_PAYLOAD_TYPE 0xFFFFFFFF
/****************************************************************************
* Global - Types
*/
struct RTPPayloadInfo
{
const char* pEncoding;
UINT32 ulRTPFactor;
UINT32 ulHXFactor;
BOOL bTimestampDeliv;
UINT32 ulBitRate;
UINT16 usChannels;
};
struct MimeTypeToClockRateInfo
{
const char* pMimeType;
UINT32 ulSamplesPerSecond;
};
struct RTPPayloadHeaderPair
{
ULONG32 ulPayloadType;
const BYTE* pHeader;
ULONG32 ulHeaderSize;
};
/* opaque data for known RTP payloads */
const BYTE p_zPCMU_DATA[] =
{
0x01, 0x00, 0x01, 0x00, 0x40, 0x1f, 0x00, 0x00,
0x40, 0x1f, 0x00, 0x00, 0x01, 0x00, 0x08, 0x00,
0x00, 0x00, 0x26, 0x26
};
const BYTE p_zPCMA_DATA[] =
{
0x06, 0x00, 0x01, 0x00, 0x40, 0x1f, 0x00, 0x00,
0x40, 0x1f, 0x00, 0x00, 0x01, 0x00, 0x08, 0x00,
0x00, 0x00, 0x26, 0x26
};
const BYTE p_zL162CH_DATA[] =
{
0x00, 0x00, 0x43, 0x50, 0x00, 0x01, 0x00, 0x02,
0x00, 0x00, 0xac, 0x44, 0x00, 0x10, 0x00, 0x00
};
const BYTE p_zL161CH_DATA[] =
{
0x00, 0x00, 0x43, 0x50, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0xac, 0x44, 0x00, 0x10, 0x00, 0x00
};
const BYTE p_zGSM_DATA[] =
{
0x31, 0x00, 0x01, 0x00, 0x40, 0x1f, 0x00, 0x00,
0x59, 0x06, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,
0x02, 0x00, 0x40, 0x01, 0x26, 0x26
};
typedef struct tPCMHEADER
{
UINT16 usFormatTag; /* format type */
UINT16 usChannels; /* number of channels (i.e. mono, stereo..*/
UINT32 ulSamplesPerSec; /* sample rate */
UINT16 usBitsPerSample; /* number of bits per sample of mono data*/
UINT16 usSampleEndianness; /* for 16-bit samples, 0==little, 1==big */
} PCMHEADER;
/****************************************************************************
* Payload to header table - must be NULL entry terminated
*/
const RTPPayloadHeaderPair z_PayloadHeaderPairList[] =
{
{ RTP_PAYLOAD_PCMU, p_zPCMU_DATA, sizeof(p_zPCMU_DATA) },
{ RTP_PAYLOAD_PCMA, p_zPCMA_DATA, sizeof(p_zPCMA_DATA) },
{ RTP_PAYLOAD_L16_2CH, p_zL162CH_DATA, sizeof(p_zL162CH_DATA) },
{ RTP_PAYLOAD_L16_1CH, p_zL161CH_DATA, sizeof(p_zL161CH_DATA) },
{ RTP_PAYLOAD_GSM, p_zGSM_DATA, sizeof(p_zGSM_DATA) },
{ RTP_BAD_PAYLOAD_TYPE, NULL, 0 }
};
/****************************************************************************
* Payload to RN MimeType Table
* This table identifies payloads RN can render and the mappings from
* the payloads to renderer mime types.
* With the transition to standard mime types supported by renderers,
* this table will lose the function of mapping but will continue to
* identify the renderer supported payloads.
*/
const char* const z_PayloadToRNMimeMap[RTP_PAYLOAD_MAP_SIZE] =
{
"audio/PCMU", // 0
NULL, // 1
NULL, // 2
"audio/x-pn-gsm610", // 3
NULL, // 4
"audio/x-pn-dvi4", // 5
"audio/x-pn-dvi4", // 6
NULL, // 7
"audio/PCMA", // 8
NULL, // 9
"audio/L16", // 10
"audio/L16", // 11
NULL, // 12
NULL, // 13
"audio/MPA", // 14
NULL, // 15
NULL, // 16
NULL, // 17
NULL, // 18
NULL, // 19
NULL, // 20
NULL, // 21
NULL, // 22
NULL, // 23
NULL, // 24
NULL, // 25
"video/x-pn-jpeg-plugin", // 26
NULL, // 27
NULL, // 28
NULL, // 29
NULL, // 30
"video/H261", // 31
"video/MPV", // 32
NULL, // 33
"video/H263" // 34
};
/*
* Payload timestamp conversion table - contains the RTPTimestamp to
* HXTimestamp ratio factor as well as whether or not this payload
* is frame based or not. Since packet size is not included in the To compute the timestamp conversion ratio
* use this formula for sample based payloads:
*
* ClockRate (sam/sec) * SampleSize (Bytes/Sample * Channels) / 1000 =
* RTPFactor/HXFactor
*
* The stream headers RTPTimestampConversionFactor, HXTimestampConversionFactor
* and TimestampDelivery are added for known and supported payload types.
*
* To convert RTP to RMA time multiply the RTP timestamp by the fraction:
* RTPTimestampConversionFactor / HXTimestampConversionFactor
* To convert RMA to RTP time multiply the RMA timestamp by the fraction:
* HXTimestampConversionFactor / RTPTimestampConversionFactor
*
* This information should be exposed with IHXRTPTimestampConverter
*/
/* taken from draft-ietf-avt-profile-new-08.txt */
const RTPPayloadInfo z_pPayloads[RTP_PAYLOAD_MAP_SIZE] =
{
/* encoding RTP RMA TSD BW Channels */
{ "PCMU", 8, 1, 0, 64000, 1 }, // 0 8000/8/1
{ "1016", 8, 1, 1, 0, 1 }, // 1 8000/N/1
{ "G726-32",8, 1, 0, 32000, 1 }, // 2 8000/4/1
{ "GSM", 8, 1, 1, 0, 1 }, // 3 8000/N/1
{ "G723", 8, 1, 1, 0, 1 }, // 4 8000/N/1
{ "DVI4", 8, 1, 0, 32000, 1 }, // 5 8000/4/1
{ "DVI4", 16, 1, 0, 64000, 1 }, // 6 16000/4/1
{ "LPC", 8, 1, 1, 0, 1 }, // 7 8000/N/1
{ "PCMA", 8, 1, 0, 64000, 1 }, // 8 8000/8/1
{ "G722", 8, 1, 0, 64000, 1 }, // 9 8000/8/1
{ "L16", 441, 10, 0, 1411200, 2 }, // 10 44100/16/2
{ "L16", 441, 10, 0, 705600, 1 }, // 11 44100/16/1
{ "QCELP", 8, 1, 1, 0, 1 }, // 12 8000/N/1
{ NULL, 0, 0, 0, 0, 0 }, // 13 reserved
{ "MPA", 90, 1, 1, 0, 0 }, // 14 90000/N
{ "G728", 8, 1, 1, 0, 1 }, // 15 8000/N/1
{ "DVI4", 441, 40, 0, 44100, 1 }, // 16 11025/4/1
{ "DVI4", 441, 20, 0, 88200, 1 }, // 17 22050/4/1
{ "G729", 8, 1, 1, 0, 1 }, // 18 8000/N/1
{ NULL, 0, 0, 0, 0, 0 }, // 19 reserved
{ NULL, 0, 0, 0, 0, 0 }, // 20 unassigned
{ NULL, 0, 0, 0, 0, 0 }, // 21 unassigned
{ NULL, 0, 0, 0, 0, 0 }, // 22 unassigned
{ NULL, 0, 0, 0, 0, 0 }, // 23 unassigned
{ NULL, 0, 0, 0, 0, 0 }, // 24 unassigned
{ "CelB", 90, 1, 1, 0, 0 }, // 25 90000/N
{ "JPEG", 90, 1, 1, 0, 0 }, // 26 90000/N
{ NULL, 0, 0, 0, 0, 0 }, // 27 unassigned
{ "nv", 90, 1, 1, 0, 0 }, // 28 90000/N
{ NULL, 0, 0, 0, 0, 0 }, // 29 unassigned
{ NULL, 0, 0, 0, 0, 0 }, // 30 unassigned
{ "H261", 90, 1, 1, 0, 0 }, // 31 90000/N
{ "MPV", 90, 1, 1, 0, 0 }, // 32 90000/N
{ "MP2T", 90, 1, 1, 0, 0 }, // 33 90000/N
{ "H263", 90, 1, 1, 0, 0 }, // 34 90000/N
};
const UINT32 z_cPayloads =
sizeof(z_pPayloads) /
sizeof(z_pPayloads[0]);
/*
* yet another table for mimetype to samplespersecond
*/
const MimeTypeToClockRateInfo z_pMimeTypeToClockRate[] =
{
{ "video/H263-1998", 90000},
{ "audio/mpa-robust", 90000}
};
const UINT32 z_cMimeTypeToClockRate =
sizeof(z_pMimeTypeToClockRate) /
sizeof(z_pMimeTypeToClockRate[0]);
const UINT8* SDPGetGSMOpaqueData()
{
return p_zGSM_DATA;
}
ULONG32 SDPGetGSMOpaqueDataSize()
{
return sizeof(p_zGSM_DATA);
}
/****************************************************************************
* SDPIsStaticPayload
*/
BOOL SDPIsStaticPayload(ULONG32 ulPayloadType)
{
return (ulPayloadType < RTP_PAYLOAD_MAP_SIZE);
}
/****************************************************************************
* SDPMapPayloadToRTPFactor
*/
UINT32 SDPMapPayloadToRTPFactor(ULONG32 ulPayloadType)
{
HX_ASSERT(SDPIsStaticPayload(ulPayloadType));
return z_pPayloads[ulPayloadType].ulRTPFactor;
}
/****************************************************************************
* SDPMapPayloadToRMAFactor
*/
UINT32 SDPMapPayloadToRMAFactor(ULONG32 ulPayloadType)
{
HX_ASSERT(SDPIsStaticPayload(ulPayloadType));
return z_pPayloads[ulPayloadType].ulHXFactor;
}
/****************************************************************************
* SDPMapPayloadToSamplesPerSecond
*/
ULONG32 SDPMapPayloadToSamplesPerSecond(ULONG32 ulPayloadType)
{
if (SDPIsStaticPayload(ulPayloadType))
{
return (ULONG32) (1000.0 *
((double) SDPMapPayloadToRTPFactor(ulPayloadType)) /
((double) SDPMapPayloadToRMAFactor(ulPayloadType)));
}
return 0;
}
/****************************************************************************
* SDPIsTimestampDeliverable
*/
BOOL SDPIsTimestampDeliverable(ULONG32 ulPayloadType)
{
HX_ASSERT(SDPIsStaticPayload(ulPayloadType));
return z_pPayloads[ulPayloadType].bTimestampDeliv;
}
/****************************************************************************
* SDPMapPayloadToEncodingName
*/
const char* SDPMapPayloadToEncodingName(ULONG32 ulPayloadType)
{
if (SDPIsStaticPayload(ulPayloadType))
{
return z_pPayloads[ulPayloadType].pEncoding;
}
return NULL;
}
/****************************************************************************
* SDPMapPayloadToEncodingName
*/
const char* SDPMapPayloadToMimeType(ULONG32 ulPayloadType)
{
if (SDPIsStaticPayload(ulPayloadType))
{
return z_PayloadToRNMimeMap[ulPayloadType];
}
return NULL;
}
/****************************************************************************
* SDPMapPayloadToChannels
*/
UINT16 SDPMapPayloadToChannels(ULONG32 ulPayloadType)
{
if (SDPIsStaticPayload(ulPayloadType))
{
return z_pPayloads[ulPayloadType].usChannels;
}
return 0;
}
/****************************************************************************
* SDPMapPayloadToBitrate
*/
ULONG32 SDPMapPayloadToBitrate(ULONG32 ulPayloadType)
{
if (SDPIsStaticPayload(ulPayloadType))
{
return z_pPayloads[ulPayloadType].ulBitRate;
}
return 0;
}
/****************************************************************************
* SDPMapMimeTypeToSampleRate
*/
ULONG32 SDPMapMimeTypeToSampleRate(const char* pMimeType)
{
ULONG32 ulSamplesPerSecond = 0;
for (ULONG32 ulIdx = 0;
ulIdx < z_cMimeTypeToClockRate;
ulIdx++)
{
if (z_pMimeTypeToClockRate[ulIdx].pMimeType &&
!strcasecmp(
z_pMimeTypeToClockRate[ulIdx].pMimeType,
pMimeType))
{
ulSamplesPerSecond =
z_pMimeTypeToClockRate[ulIdx].ulSamplesPerSecond;
break;
}
}
return ulSamplesPerSecond;
}
/****************************************************************************
* SDPMapPayloadToHeaderData
*/
const UCHAR* SDPMapPayloadToHeaderData(ULONG32 ulPayloadType,
ULONG32& ulDataSize)
{
const RTPPayloadHeaderPair* pPair;
for (pPair = z_PayloadHeaderPairList;
pPair->pHeader;
pPair++)
{
if (pPair->ulPayloadType == ulPayloadType)
{
ulDataSize = pPair->ulHeaderSize;
return pPair->pHeader;
}
}
ulDataSize = 0;
return NULL;
}
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