#include #include #include #include #pragma comment(lib, "msacm32.lib") class WaveFormat { public: WaveFormat() { size = 0; waveFormat = NULL; } WaveFormat(const WaveFormat & fmt) { size = fmt.size; waveFormat = (WAVEFORMATEX *)malloc(size); memcpy(waveFormat, fmt.waveFormat, size); } ~WaveFormat() { if (waveFormat != NULL) free(waveFormat); } WaveFormat & operator=(const WaveFormat & fmt) { if (this == &fmt) return *this; if (waveFormat != NULL) free(waveFormat); size = fmt.size; waveFormat = (WAVEFORMATEX *)malloc(size); memcpy(waveFormat, fmt.waveFormat, size); return *this; } void SetFormat(unsigned numChannels, unsigned sampleRate, unsigned bitsPerSample) { if (waveFormat != NULL) free(waveFormat); size = sizeof(WAVEFORMATEX); waveFormat = (WAVEFORMATEX *)malloc(sizeof(WAVEFORMATEX)); waveFormat->wFormatTag = WAVE_FORMAT_PCM; waveFormat->nChannels = (WORD)numChannels; waveFormat->nSamplesPerSec = sampleRate; waveFormat->wBitsPerSample = (WORD)bitsPerSample; waveFormat->nBlockAlign = (WORD)(numChannels*(bitsPerSample+7)/8); waveFormat->nAvgBytesPerSec = waveFormat->nSamplesPerSec*waveFormat->nBlockAlign; waveFormat->cbSize = 0; } void SetFormat(const void * data, unsigned size) { SetSize(size); memcpy(waveFormat, data, size); } bool SetSize(unsigned sz) { if (waveFormat != NULL) free(waveFormat); size = sz; if (sz == 0) waveFormat = NULL; else { if (sz < sizeof(WAVEFORMATEX)) sz = sizeof(WAVEFORMATEX); waveFormat = (WAVEFORMATEX *)calloc(sz, 1); waveFormat->cbSize = (WORD)(sz - sizeof(WAVEFORMATEX)); } return waveFormat != NULL; } unsigned GetSize() const { return size; } void * GetPointer() const { return waveFormat; } WAVEFORMATEX * operator->() const { return waveFormat; } WAVEFORMATEX & operator *() const { return *waveFormat; } operator WAVEFORMATEX *() const { return waveFormat; } protected: unsigned size; WAVEFORMATEX * waveFormat; }; ///////////////////////////////////////////////////////////////////////////// static const struct { WAVEFORMATEX wf; BYTE extra[10]; } g7231format = { { 66, 1, 8000, 800, 24, 0, 10 }, { 2, 0, 0xce, 0x9a, 0x32, 0xf7, 0xa2, 0xae, 0xde, 0xac } }; static const unsigned G7231PacketSizes[4] = { 24, 20, 4, 1 }; ///////////////////////////////////////////////////////////////////////////// static void * create_encoder(const struct PluginCodec_Definition *) { WaveFormat srcFormat; srcFormat.SetFormat(1, 8000, 16); WaveFormat dstFormat; dstFormat.SetFormat(&g7231format, sizeof(g7231format)); HACMSTREAM hStream; MMRESULT result = acmStreamOpen(&hStream, NULL, // driver srcFormat, // source format dstFormat, // destination format NULL, // no filter NULL, // no callback 0, // instance data (not used) 0); // flags if (result != 0) return NULL; return (void *)hStream; } static int codec_encoder(const struct PluginCodec_Definition * /*defn*/, void * context, const void * from, unsigned * fromLen, void * to, unsigned * toLen, unsigned int * /*flag*/) { HACMSTREAM hStream = (HACMSTREAM)context; if (hStream == NULL) return PFalse; ACMSTREAMHEADER header; memset(&header, 0, sizeof(header)); header.cbStruct = sizeof(header); header.pbSrc = (unsigned char *)from; header.cbSrcLength = *fromLen; header.pbDst = (unsigned char *)to; header.cbDstLength = *toLen; // prep the header MMRESULT result = acmStreamPrepareHeader(hStream, &header, 0); if (result != 0) { //PTRACE(1, "Codec\tError in encode acmStreamPrepareHeader: error=" << result); return PFalse; } result = acmStreamConvert(hStream, &header, 0); if (result != 0) { //PTRACE(1, "Codec\tError in encode acmStreamConvert: error=" << result); return PFalse; } *fromLen = 240*2; *toLen = G7231PacketSizes[((unsigned char *)to)[0]&3]; return PTrue; } static void destroy_encoder(const struct PluginCodec_Definition * /*defn*/, void * context) { HACMSTREAM hStream = (HACMSTREAM)context; if (hStream != NULL) acmStreamClose(hStream, 0); } ///////////////////////////////////////////////////////////////////////////// static void * create_decoder(const struct PluginCodec_Definition * /*defn*/) { WaveFormat srcFormat; srcFormat.SetFormat(&g7231format, sizeof(g7231format)); WaveFormat dstFormat; dstFormat.SetFormat(1, 8000, 16); HACMSTREAM hStream; MMRESULT result = acmStreamOpen(&hStream, NULL, // driver srcFormat, // source format dstFormat, // destination format NULL, // no filter NULL, // no callback 0, // instance data (not used) 0); // flags if (result != 0) return NULL; return (void *)hStream; } static int codec_decoder(const struct PluginCodec_Definition * /*defn*/, void * context, const void * from, unsigned * fromLen, void * to, unsigned * toLen, unsigned int * /*flag*/) { HACMSTREAM hStream = (HACMSTREAM)context; if (hStream == NULL) return PFalse; ACMSTREAMHEADER header; memset(&header, 0, sizeof(header)); header.cbStruct = sizeof(header); header.pbSrc = (BYTE *)from; *fromLen = header.cbSrcLength = G7231PacketSizes[((unsigned char *)from)[0]&3]; if (header.cbSrcLength > *fromLen) header.cbSrcLength = *fromLen; header.pbDst = (unsigned char *)to; header.cbDstLength = *toLen; // make sure all frames are 24 bytes long static BYTE frameBuffer[24]; if (header.cbSrcLength < 24) { memcpy(frameBuffer, header.pbSrc, header.cbSrcLength); header.cbSrcLength = 24; header.pbSrc = frameBuffer; } // prep the header MMRESULT result = acmStreamPrepareHeader(hStream, &header, 0); if (result != 0) { //PTRACE(1, "Codec\tError in decode acmStreamPrepareHeader: error=" << result); return PFalse; } result = acmStreamConvert(hStream, &header, 0); if (result != 0) { //PTRACE(1, "Codec\tError in decode acmStreamConvert: error=" << result); return PFalse; } *toLen = header.cbSrcLength; return PTrue; } static void destroy_decoder(const struct PluginCodec_Definition * /*defn*/, void * context) { HACMSTREAM hStream = (HACMSTREAM)context; if (hStream != NULL) acmStreamClose(hStream, 0); } ///////////////////////////////////////////////////////////////////////////// static struct PluginCodec_information licenseInfo = { 1073357308, // timestamp = Tue 06 Jan 2004 02:48:28 AM UTC "Craig Southeren, Post Increment", // source code author "$Ver$", // source code version "craigs@postincrement.com", // source code email "http://www.postincrement.com", // source code URL "Copyright (C) 2004 by Post Increment, All Rights Reserved", // source code copyright "MPL 1.0", // source code license PluginCodec_License_MPL, // source code license "G.723.1", // codec description "Microsoft Corp.", // codec author NULL, // codec version NULL, // codec email NULL, // codec URL NULL, // codec copyright information NULL, // codec license PluginCodec_License_RoyaltiesRequired // codec license code }; static const char L16Desc[] = { "L16" }; static const char G7231Desc[] = { "G.723.1" }; static const char CiscoG7231A[] = { "Cisco G.7231A" }; static const char CiscoG7231AR[] = { "Cisco G.7231AR" }; static const char G7231ar[] = { "G7231ar" }; static const char ianaName[] = { "G723" }; static const int ianaCode = 4; static struct PluginCodec_H323NonStandardCodecData g7231arCap = { NULL, // object ID 181, // T35 country code 0, // T35 extension code 18, // T35 manufacturer code (const unsigned char *)G7231ar, // data sizeof(G7231ar)-1, // data length NULL // capability match function }; static PluginCodec_Definition g7231CodecDefn[] = { { // G.723.1 encoder PLUGIN_CODEC_VERSION, // codec API version &licenseInfo, // license information PluginCodec_MediaTypeAudio | // audio codec PluginCodec_InputTypeRaw | // raw input data PluginCodec_OutputTypeRaw | // raw output data PluginCodec_RTPTypeExplicit, // explicit RTP type G7231Desc, // text decription L16Desc, // source format G7231Desc, // destination format NULL, // user data 8000, // samples per second 6300, // raw bits per second 30000, // nanoseconds per frame 240, // samples per frame 24, // bytes per frame 1, // recommended number of frames per packet 4, // maximum number of frames per packet ianaCode, // IANA RTP payload code ianaName, // use standard IANA payload name for SDP create_encoder, // create codec function destroy_encoder, // destroy codec codec_encoder, // encode/decode NULL, // codec controls PluginCodec_H323AudioCodec_g7231, // h323CapabilityType 0, // h323CapabilityData (silence supression) }, { // G.723.1 decoder PLUGIN_CODEC_VERSION, // codec API version &licenseInfo, // license information PluginCodec_MediaTypeAudio | // audio codec PluginCodec_InputTypeRaw | // raw input data PluginCodec_OutputTypeRaw | // raw output data PluginCodec_RTPTypeExplicit, // explicit RTP type G7231Desc, // text decription G7231Desc, // source format L16Desc, // destination format NULL, // user data 8000, // samples per second 6300, // raw bits per second 30000, // nanoseconds per frame 240, // samples per frame 24, // bytes per frame 1, // recommended number of frames per packet 4, // maximum number of frames per packet ianaCode, // IANA RTP payload code ianaName, // use standard IANA payload name for SDP create_decoder, // create codec function destroy_decoder, // destroy codec codec_decoder, // encode/decode NULL, // codec controls PluginCodec_H323AudioCodec_g7231, // h323CapabilityType 0, // h323CapabilityData (silence supression) }, { // Cisco g7231a encoder PLUGIN_CODEC_VERSION, // codec API version &licenseInfo, // license information PluginCodec_MediaTypeAudio | // audio codec PluginCodec_InputTypeRaw | // raw input data PluginCodec_OutputTypeRaw | // raw output data PluginCodec_RTPTypeExplicit, // explicit RTP type CiscoG7231A, // text decription L16Desc, // source format CiscoG7231A, // destination format NULL, // user data 8000, // samples per second 6300, // raw bits per second 30000, // nanoseconds per frame 240, // samples per frame 24, // bytes per frame 1, // recommended number of frames per packet 4, // maximum number of frames per packet ianaCode, // IANA RTP payload code NULL, // No IANA payload name for SDP create_encoder, // create codec function destroy_encoder, // destroy codec codec_encoder, // encode/decode NULL, // codec controls PluginCodec_H323AudioCodec_g7231, // h323CapabilityType (void *)1, // h323CapabilityData (silence supression) }, { // Cisco g7231a decoder PLUGIN_CODEC_VERSION, // codec API version &licenseInfo, // license information PluginCodec_MediaTypeAudio | // audio codec PluginCodec_InputTypeRaw | // raw input data PluginCodec_OutputTypeRaw | // raw output data PluginCodec_RTPTypeExplicit, // explicit RTP type CiscoG7231A, // text decription CiscoG7231A, // source format L16Desc, // destination format NULL, // user data 8000, // samples per second 6300, // raw bits per second 30000, // nanoseconds per frame 240, // samples per frame 24, // bytes per frame 1, // recommended number of frames per packet 4, // maximum number of frames per packet ianaCode, // IANA RTP payload code NULL, // No IANA payload name for SDP create_decoder, // create codec function destroy_decoder, // destroy codec codec_decoder, // encode/decode NULL, // codec controls PluginCodec_H323AudioCodec_g7231, // h323CapabilityType (void *)1, // h323CapabilityData (silence supression) }, { // Cisco g7231ar encoder PLUGIN_CODEC_VERSION, // codec API version &licenseInfo, // license information PluginCodec_MediaTypeAudio | // audio codec PluginCodec_InputTypeRaw | // raw input data PluginCodec_OutputTypeRaw | // raw output data PluginCodec_RTPTypeExplicit, // explicit RTP type CiscoG7231AR, // text decription L16Desc, // source format CiscoG7231AR, // destination format NULL, // user data 8000, // samples per second 6300, // raw bits per second 30000, // nanoseconds per frame 240, // samples per frame 24, // bytes per frame 1, // recommended number of frames per packet 4, // maximum number of frames per packet ianaCode, // IANA RTP payload code NULL, // No IANA payload name for SDP create_encoder, // create codec function destroy_encoder, // destroy codec codec_encoder, // encode/decode NULL, // codec controls PluginCodec_H323Codec_nonStandard, // h323CapabilityType &g7231arCap // h323CapabilityData }, { // Cisco g7231ar decoder PLUGIN_CODEC_VERSION, // codec API version &licenseInfo, // license information PluginCodec_MediaTypeAudio | // audio codec PluginCodec_InputTypeRaw | // raw input data PluginCodec_OutputTypeRaw | // raw output data PluginCodec_RTPTypeExplicit, // explicit RTP type CiscoG7231AR, // text decription CiscoG7231AR, // source format L16Desc, // destination format NULL, // user data 8000, // samples per second 6300, // raw bits per second 30000, // nanoseconds per frame 240, // samples per frame 24, // bytes per frame 1, // recommended number of frames per packet 4, // maximum number of frames per packet ianaCode, // IANA RTP payload code NULL, // No IANA payload name for SDP create_decoder, // create codec function destroy_decoder, // destroy codec codec_decoder, // encode/decode NULL, // codec controls PluginCodec_H323Codec_nonStandard, // h323CapabilityType &g7231arCap // h323CapabilityData }, }; #define NUM_DEFNS (sizeof(g7231CodecDefn) / sizeof(PluginCodec_Definition)) ///////////////////////////////////////////////////////////////////////////// extern "C" { PLUGIN_CODEC_IMPLEMENT(G7231_ACM) PLUGIN_CODEC_DLL_API PluginCodec_Definition * PLUGIN_CODEC_GET_CODEC_FN(unsigned * count, unsigned /*version*/) { *count = NUM_DEFNS; return g7231CodecDefn; } };