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1 /* |
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2 * Copyright (c) 2004-2006 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Reads RTP payload format containing G729 data. |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 #ifndef G729PAYLOADFORMATREAD_H |
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21 #define G729PAYLOADFORMATREAD_H |
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22 |
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23 // INCLUDES |
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24 #include <e32base.h> |
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25 #include <mmf/server/mmfformat.h> |
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26 #include "rtpheader.h" |
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27 #include "formatstatemachine.h" |
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28 #include "mccinternalcodecs.h" |
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29 |
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30 // CLASS DECLARATION |
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31 /** |
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32 * Depacketizes RTP payload containing G729 data. |
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33 * |
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34 * @lib ?library |
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35 * @since Series 60 3.0 |
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36 */ |
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37 class CG729PayloadFormatRead : public CPayloadFormatRead, |
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38 public MAsyncEventHandler, |
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39 public MPayloadFormatRead |
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40 { |
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41 public: |
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42 /** |
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43 * Two-phased constructor. |
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44 * @param aSource Data source configuration parameters |
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45 */ |
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46 static CG729PayloadFormatRead* NewL (MDataSource* aSource); |
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47 |
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48 /** |
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49 * Destructor. |
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50 */ |
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51 virtual ~CG729PayloadFormatRead (); |
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52 |
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53 public: // New functions |
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54 |
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55 /** |
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56 * Configures payload format with format spesific parameters. |
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57 * Leaves with KErrArgument if parameters are invalid. |
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58 * |
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59 * @since Series 60 3.0 |
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60 * @param aConfigParams Configuration parameters |
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61 * @return void |
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62 */ |
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63 virtual void ConfigurePayloadFormatL( const TDesC8& aConfigParams ); |
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64 |
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65 public: // From CMMFFormatDecode |
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66 |
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67 /** |
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68 * Return number of audio streams for the given media |
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69 * Raw audio files can only have 1 audio stream |
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70 * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo |
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71 * @return Number of audio streams |
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72 */ |
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73 virtual TUint Streams(TUid aMediaType) const; |
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74 |
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75 /** |
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76 * Return the frame time interval for the given media |
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77 * |
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78 * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo |
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79 * |
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80 * @return Time interval in micro seconds |
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81 */ |
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82 virtual TTimeIntervalMicroSeconds FrameTimeInterval( |
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83 TMediaId aMediaType) const; |
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84 |
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85 /** *** NOT SUPPORTED *** |
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86 * Return the clip duration for the given media |
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87 * |
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88 * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo |
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89 * |
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90 * @return Clip duration in micro seconds |
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91 */ |
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92 virtual TTimeIntervalMicroSeconds Duration( |
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93 TMediaId /*aMediaType*/) const; |
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94 |
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95 /** |
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96 * Accessor funtion to return the number of channels |
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97 * |
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98 * @param |
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99 * |
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100 * @return Number of channels |
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101 */ |
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102 virtual TUint NumChannels(); |
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103 |
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104 /** |
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105 * Accessor funtion to return the sampling rate |
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106 * |
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107 * @param |
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108 * |
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109 * @return Sampling rate |
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110 */ |
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111 virtual TUint SampleRate(); |
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112 |
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113 /** |
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114 * Set the samplerate to the given value. |
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115 * |
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116 * @param aSampleRate |
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117 * |
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118 * @return error code KErrNotSupported if invalid samplerate, else |
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119 * return KErrNone |
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120 */ |
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121 virtual TInt SetSampleRate (TUint aSampleRate); |
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122 |
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123 public: // From MDataSource |
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124 |
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125 /** |
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126 * Return the four CC code for the given media |
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127 * |
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128 * @param aMediaId contains the media type KUidMediaTypeAudio or |
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129 * KUidMediaTypeVideo |
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130 * |
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131 * @return FourCC code |
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132 */ |
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133 virtual TFourCC SourceDataTypeCode(TMediaId aMediaId); |
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134 |
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135 /** |
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136 * Set the source data type to the given four CC code for the given |
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137 * media |
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138 * |
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139 * @param aSourceFourCC fourCC code |
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140 * @param aMediaId contains the media type KUidMediaTypeAudio |
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141 * or KUidMediaTypeVideo |
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142 * |
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143 * @return error code KErrNotSupported if invalid |
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144 * media ID, else return KErrNone |
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145 */ |
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146 virtual TInt SetSourceDataTypeCode( |
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147 TFourCC aSourceFourCC, |
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148 TMediaId aMediaId |
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149 ); |
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150 |
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151 /** |
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152 * Create a source buffer for the given media |
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153 * |
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154 * @param aMediaId contains the media type KUidMediaTypeAudio or |
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155 * KUidMediaTypeVideo |
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156 * @param aReference value of False is returned to caller if source |
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157 * buffer is created |
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158 * |
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159 * @return Pointer to source buffer created |
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160 */ |
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161 virtual CMMFBuffer* CreateSourceBufferL( |
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162 TMediaId aMediaId, |
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163 TBool &aReference |
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164 ); |
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165 |
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166 /** |
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167 * Create a source buffer for the given media, setting frame size |
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168 * to match the given sink buffer |
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169 * |
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170 * @param aMediaId contains the media type KUidMediaTypeAudio or |
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171 * KUidMediaTypeVideo |
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172 * @param aSinkBuffer address of sink buffer |
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173 * @param aReference value of False is returned to caller if source |
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174 * buffer is created |
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175 * |
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176 * @return Pointer to source buffer created |
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177 */ |
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178 virtual CMMFBuffer* CreateSourceBufferL( |
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179 TMediaId aMediaId, |
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180 CMMFBuffer& aSinkBuffer, |
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181 TBool &aReference |
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182 ); |
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183 |
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184 /** |
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185 * Read the next block of data from file into the given buffer |
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186 * |
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187 * @param aBuffer source data buffer for the AMR-NB data read |
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188 * @param aConsumer data sink pointer |
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189 * @param aMediaId contains the media type KUidMediaTypeAudio or |
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190 * KUidMediaTypeVideo |
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191 * |
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192 * @return |
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193 */ |
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194 virtual void FillBufferL( |
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195 CMMFBuffer* aBuffer, |
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196 MDataSink* aConsumer, |
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197 TMediaId aMediaId |
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198 ); |
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199 |
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200 /** |
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201 * Log in to the source thread - this funtion merely passes the |
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202 * command to its source clip data source object. The source clip |
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203 * object will handle the thread log on procedures. |
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204 * |
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205 * @param aEventHandler address of event handler |
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206 * |
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207 * @return error code returned by source clip |
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208 */ |
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209 virtual TInt SourceThreadLogon(MAsyncEventHandler& aEventHandler); |
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210 |
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211 /** |
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212 * Log out of the source thread - this funtion merely passes the |
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213 * command to its source clip data source object. The source clip |
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214 * object will handle the thread log off procedures. |
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215 * |
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216 * @param |
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217 * @return |
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218 */ |
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219 virtual void SourceThreadLogoff(); |
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220 |
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221 /** |
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222 * Negotiate source settings (buffer size) to match |
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223 * given source object |
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224 * |
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225 * @param aDataSink address of sink object |
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226 * |
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227 * @return |
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228 */ |
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229 virtual void NegotiateSourceL(MDataSink& aDataSink); |
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230 |
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231 |
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232 /** |
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233 * From MDataSource Primes the source. |
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234 * @since |
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235 * @param None |
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236 */ |
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237 virtual void SourcePrimeL(); |
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238 |
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239 /** |
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240 * From MDataSource Plays the source. |
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241 * @since |
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242 * @param None |
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243 */ |
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244 virtual void SourcePlayL(); |
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245 |
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246 /** |
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247 * From MDataSource Pauses the source. |
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248 * @since |
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249 * @param None |
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250 */ |
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251 virtual void SourcePauseL(); |
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252 |
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253 /** |
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254 * From MDataSource Stops the source. |
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255 * @since |
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256 * @param None |
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257 */ |
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258 virtual void SourceStopL(); |
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259 |
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260 |
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261 public: // From MDataSink |
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262 |
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263 /** |
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264 * Called after the data buffer is filled. Update the number of bytes |
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265 * read and the current read position for the next read operation. |
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266 * |
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267 * @param aBuffer data buffer filled |
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268 * |
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269 * @return |
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270 */ |
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271 virtual void DataBufferFilledL( CMMFBuffer* aBuffer, |
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272 const TRtpRecvHeader& aRecvHeader ); |
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273 |
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274 /** |
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275 * Gets the data type code for the sink specified by the media ID. |
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276 * Format decode may act in role of MDataSink. |
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277 * |
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278 * @param aMediaId Media ID |
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279 * @return The data sink type code |
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280 */ |
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281 TFourCC SinkDataTypeCode( TMediaId aMediaId ); |
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282 |
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283 |
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284 public: // From MAsyncEventHandler |
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285 virtual TInt SendEventToClient(const TMMFEvent& /*aEvent*/) |
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286 {return KErrNone;} |
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287 |
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288 |
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289 public: // From MPayloadFormatRead |
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290 |
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291 |
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292 /** |
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293 * Send full sink buffer with iLBC frames to data path. |
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294 * Sink buffer is decided on one of the two frame buffers |
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295 * Called by the state machine. |
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296 * @since |
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297 * @param None |
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298 */ |
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299 void SendDataToSinkL(); |
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300 |
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301 /** |
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302 * Fill the sink buffer by decoding the RTP payload into iLBC frames |
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303 * Sink buffer is decided on one of the two frame buffers |
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304 * Called by the state machine. |
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305 * @since |
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306 * @param None |
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307 */ |
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308 void FillSinkBufferL(); |
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309 |
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310 /** |
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311 * Request the RTPSource to fill the source buffer with RTP payload |
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312 * Source buffer is decided by the RTPSource. |
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313 * Called by the state machine. |
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314 * @since |
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315 * @param None |
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316 */ |
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317 void FillSourceBufferL(); |
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318 |
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319 private: // New functions |
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320 |
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321 /** |
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322 * Decode audio frames from RTP payload to the audio frame array. |
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323 * Next decoded frame may be requested by GetNextFrameL(). |
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324 * |
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325 * @since Series 60 3.0 |
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326 * @param aSourceBuffer RTP payload to be decoded |
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327 * @return void |
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328 */ |
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329 void DecodePayload( const TDesC8& aSourceBuffer ); |
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330 |
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331 /** |
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332 * Return next decoded audio frame. |
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333 * @since Series 60 3.0 |
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334 * @param aToBuffer - [output] Buffer to place decoded frame |
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335 * @return void |
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336 */ |
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337 void GetNextFrame( TDes8& aToBuffer ); |
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338 |
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339 /** |
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340 * Does unpacking for bit-packed G729 RTP payload. |
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341 * @since Series 60 3.0 |
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342 * @param aSourceBuf Source buffer where to read from |
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343 * @param aDestBuf Destination buffer where to place unpacked data |
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344 * @param aIsCNoise Indicates does source buf contain comfort noise |
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345 * @return System wide error code. |
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346 */ |
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347 TInt DoBitUnPacking( const TDesC8& aSourceBuf, |
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348 TDes8& aDestBuf, |
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349 TBool aIsCNoise ) const; |
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350 |
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351 /** |
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352 * Update payload format with format spesific parameters. |
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353 * Leaves with KErrArgument if parameters are invalid. |
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354 * |
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355 * @since Series 60 3.0 |
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356 * @param aCodecInfo Configuration parameters |
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357 * @return void |
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358 */ |
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359 void UpdateConfigurationL( TMccCodecInfo& aCodecInfo ); |
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360 |
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361 private: |
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362 |
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363 /** |
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364 * C++ default constructor. |
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365 */ |
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366 CG729PayloadFormatRead (); |
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367 |
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368 /** |
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369 * By default Symbian 2nd phase constructor is private. |
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370 * |
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371 * @param aConf Decoder Configuration params |
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372 */ |
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373 void ConstructL (MDataSource* aSource); |
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374 |
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375 /** |
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376 * Creates a buffer used in data transfer between format read and |
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377 * its datasource. |
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378 * |
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379 * @since Series 60 3.2 |
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380 * @param aSize Suggested buffer size |
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381 * @param aIsOwnBuffer Indicates ownership of the buffer |
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382 * @return Created buffer |
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383 */ |
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384 CMMFDataBuffer* CreateClipBufferL( TUint aSize, TBool& aIsOwnBuffer ); |
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385 |
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386 private: // Data |
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387 enum TCurrentBuffer |
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388 { |
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389 EBufferOne = 0, |
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390 EBufferTwo |
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391 }; |
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392 |
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393 // the fourCC |
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394 TFourCC iFourCC; |
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395 |
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396 // Format decoding state machine |
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397 CFormatDecodeStateMachine* iStateMachine; |
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398 |
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399 // ETrue if decoded frames are remaining |
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400 TBool iBufferToReadExists; |
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401 |
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402 // Frame time interval in micro seconds |
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403 TTimeIntervalMicroSeconds iFrameTimeInterval; |
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404 |
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405 // Buffer to store depacketized G729 frames |
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406 CMMFDataBuffer* iFrameBufferOne; |
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407 |
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408 // Alternative buffer to store depacketized G729 frames |
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409 CMMFDataBuffer* iFrameBufferTwo; |
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410 |
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411 // Buffer to hold payload got from data source; |
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412 CMMFDataBuffer* iSourceBuffer; |
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413 |
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414 // Indicates whether payload read has ownership of source buffer |
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415 TBool iSourceBufOwnership; |
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416 |
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417 // Flag to indicate which buffer is in use |
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418 TCurrentBuffer iCurrentBuffer; |
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419 |
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420 TMediaId iMediaId; |
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421 |
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422 // Current index in set of audio frames decoded from last payload |
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423 TInt iFrameIndex; |
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424 |
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425 // Contains pointers to audio frames in received payload |
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426 RArray<TPtr8> iFrameArray; |
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427 |
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428 // RTP Header |
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429 TRtpRecvHeader iRecvHeader; |
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430 |
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431 // Parameters relating to RTP data encoding |
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432 TMccCodecInfo iCInfo; |
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433 |
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434 // Friend class |
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435 #ifdef TEST_EUNIT |
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436 friend class UT_CG729PayloadFormatRead; |
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437 #endif |
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438 }; |
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439 |
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440 |
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441 #endif /* G729PAYLOADFORMATREAD_H */ |
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442 |
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443 // End of File |