1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 //#define LOG_NDEBUG 0 18 #define LOG_TAG "SoftG711" 19 #include <utils/Log.h> 20 21 #include "SoftG711.h" 22 23 #include <media/stagefright/foundation/ADebug.h> 24 #include <media/stagefright/MediaDefs.h> 25 26 namespace android { 27 28 template<class T> 29 static void InitOMXParams(T *params) { 30 params->nSize = sizeof(T); 31 params->nVersion.s.nVersionMajor = 1; 32 params->nVersion.s.nVersionMinor = 0; 33 params->nVersion.s.nRevision = 0; 34 params->nVersion.s.nStep = 0; 35 } 36 37 SoftG711::SoftG711( 38 const char *name, 39 const OMX_CALLBACKTYPE *callbacks, 40 OMX_PTR appData, 41 OMX_COMPONENTTYPE **component) 42 : SimpleSoftOMXComponent(name, callbacks, appData, component), 43 mIsMLaw(true), 44 mNumChannels(1), 45 mSignalledError(false) { 46 if (!strcmp(name, "OMX.google.g711.alaw.decoder")) { 47 mIsMLaw = false; 48 } else { 49 CHECK(!strcmp(name, "OMX.google.g711.mlaw.decoder")); 50 } 51 52 initPorts(); 53 } 54 55 SoftG711::~SoftG711() { 56 } 57 58 void SoftG711::initPorts() { 59 OMX_PARAM_PORTDEFINITIONTYPE def; 60 InitOMXParams(&def); 61 62 def.nPortIndex = 0; 63 def.eDir = OMX_DirInput; 64 def.nBufferCountMin = kNumBuffers; 65 def.nBufferCountActual = def.nBufferCountMin; 66 def.nBufferSize = 8192; 67 def.bEnabled = OMX_TRUE; 68 def.bPopulated = OMX_FALSE; 69 def.eDomain = OMX_PortDomainAudio; 70 def.bBuffersContiguous = OMX_FALSE; 71 def.nBufferAlignment = 1; 72 73 def.format.audio.cMIMEType = 74 const_cast<char *>( 75 mIsMLaw 76 ? MEDIA_MIMETYPE_AUDIO_G711_MLAW 77 : MEDIA_MIMETYPE_AUDIO_G711_ALAW); 78 79 def.format.audio.pNativeRender = NULL; 80 def.format.audio.bFlagErrorConcealment = OMX_FALSE; 81 def.format.audio.eEncoding = OMX_AUDIO_CodingG711; 82 83 addPort(def); 84 85 def.nPortIndex = 1; 86 def.eDir = OMX_DirOutput; 87 def.nBufferCountMin = kNumBuffers; 88 def.nBufferCountActual = def.nBufferCountMin; 89 def.nBufferSize = kMaxNumSamplesPerFrame * sizeof(int16_t); 90 def.bEnabled = OMX_TRUE; 91 def.bPopulated = OMX_FALSE; 92 def.eDomain = OMX_PortDomainAudio; 93 def.bBuffersContiguous = OMX_FALSE; 94 def.nBufferAlignment = 2; 95 96 def.format.audio.cMIMEType = const_cast<char *>("audio/raw"); 97 def.format.audio.pNativeRender = NULL; 98 def.format.audio.bFlagErrorConcealment = OMX_FALSE; 99 def.format.audio.eEncoding = OMX_AUDIO_CodingPCM; 100 101 addPort(def); 102 } 103 104 OMX_ERRORTYPE SoftG711::internalGetParameter( 105 OMX_INDEXTYPE index, OMX_PTR params) { 106 switch (index) { 107 case OMX_IndexParamAudioPcm: 108 { 109 OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams = 110 (OMX_AUDIO_PARAM_PCMMODETYPE *)params; 111 112 if (pcmParams->nPortIndex > 1) { 113 return OMX_ErrorUndefined; 114 } 115 116 pcmParams->eNumData = OMX_NumericalDataSigned; 117 pcmParams->eEndian = OMX_EndianBig; 118 pcmParams->bInterleaved = OMX_TRUE; 119 pcmParams->nBitPerSample = 16; 120 if (pcmParams->nPortIndex == 0) { 121 // input port 122 pcmParams->ePCMMode = mIsMLaw ? OMX_AUDIO_PCMModeMULaw 123 : OMX_AUDIO_PCMModeALaw; 124 } else { 125 // output port 126 pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear; 127 } 128 pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF; 129 pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF; 130 131 pcmParams->nChannels = mNumChannels; 132 pcmParams->nSamplingRate = 8000; 133 134 return OMX_ErrorNone; 135 } 136 137 default: 138 return SimpleSoftOMXComponent::internalGetParameter(index, params); 139 } 140 } 141 142 OMX_ERRORTYPE SoftG711::internalSetParameter( 143 OMX_INDEXTYPE index, const OMX_PTR params) { 144 switch (index) { 145 case OMX_IndexParamAudioPcm: 146 { 147 OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams = 148 (OMX_AUDIO_PARAM_PCMMODETYPE *)params; 149 150 if (pcmParams->nPortIndex != 0 && pcmParams->nPortIndex != 1) { 151 return OMX_ErrorUndefined; 152 } 153 154 if (pcmParams->nChannels < 1 || pcmParams->nChannels > 2) { 155 return OMX_ErrorUndefined; 156 } 157 158 if(pcmParams->nPortIndex == 0) { 159 mNumChannels = pcmParams->nChannels; 160 } 161 162 return OMX_ErrorNone; 163 } 164 165 case OMX_IndexParamStandardComponentRole: 166 { 167 const OMX_PARAM_COMPONENTROLETYPE *roleParams = 168 (const OMX_PARAM_COMPONENTROLETYPE *)params; 169 170 if (mIsMLaw) { 171 if (strncmp((const char *)roleParams->cRole, 172 "audio_decoder.g711mlaw", 173 OMX_MAX_STRINGNAME_SIZE - 1)) { 174 return OMX_ErrorUndefined; 175 } 176 } else { 177 if (strncmp((const char *)roleParams->cRole, 178 "audio_decoder.g711alaw", 179 OMX_MAX_STRINGNAME_SIZE - 1)) { 180 return OMX_ErrorUndefined; 181 } 182 } 183 184 return OMX_ErrorNone; 185 } 186 187 default: 188 return SimpleSoftOMXComponent::internalSetParameter(index, params); 189 } 190 } 191 192 void SoftG711::onQueueFilled(OMX_U32 /* portIndex */) { 193 if (mSignalledError) { 194 return; 195 } 196 197 List<BufferInfo *> &inQueue = getPortQueue(0); 198 List<BufferInfo *> &outQueue = getPortQueue(1); 199 200 while (!inQueue.empty() && !outQueue.empty()) { 201 BufferInfo *inInfo = *inQueue.begin(); 202 OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader; 203 204 BufferInfo *outInfo = *outQueue.begin(); 205 OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader; 206 207 if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) { 208 inQueue.erase(inQueue.begin()); 209 inInfo->mOwnedByUs = false; 210 notifyEmptyBufferDone(inHeader); 211 212 outHeader->nFilledLen = 0; 213 outHeader->nFlags = OMX_BUFFERFLAG_EOS; 214 215 outQueue.erase(outQueue.begin()); 216 outInfo->mOwnedByUs = false; 217 notifyFillBufferDone(outHeader); 218 return; 219 } 220 221 if (inHeader->nFilledLen > kMaxNumSamplesPerFrame) { 222 ALOGE("input buffer too large (%d).", inHeader->nFilledLen); 223 224 notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL); 225 mSignalledError = true; 226 } 227 228 const uint8_t *inputptr = inHeader->pBuffer + inHeader->nOffset; 229 230 if (mIsMLaw) { 231 DecodeMLaw( 232 reinterpret_cast<int16_t *>(outHeader->pBuffer), 233 inputptr, inHeader->nFilledLen); 234 } else { 235 DecodeALaw( 236 reinterpret_cast<int16_t *>(outHeader->pBuffer), 237 inputptr, inHeader->nFilledLen); 238 } 239 240 outHeader->nTimeStamp = inHeader->nTimeStamp; 241 outHeader->nOffset = 0; 242 outHeader->nFilledLen = inHeader->nFilledLen * sizeof(int16_t); 243 outHeader->nFlags = 0; 244 245 inInfo->mOwnedByUs = false; 246 inQueue.erase(inQueue.begin()); 247 inInfo = NULL; 248 notifyEmptyBufferDone(inHeader); 249 inHeader = NULL; 250 251 outInfo->mOwnedByUs = false; 252 outQueue.erase(outQueue.begin()); 253 outInfo = NULL; 254 notifyFillBufferDone(outHeader); 255 outHeader = NULL; 256 } 257 } 258 259 // static 260 void SoftG711::DecodeALaw( 261 int16_t *out, const uint8_t *in, size_t inSize) { 262 while (inSize-- > 0) { 263 int32_t x = *in++; 264 265 int32_t ix = x ^ 0x55; 266 ix &= 0x7f; 267 268 int32_t iexp = ix >> 4; 269 int32_t mant = ix & 0x0f; 270 271 if (iexp > 0) { 272 mant += 16; 273 } 274 275 mant = (mant << 4) + 8; 276 277 if (iexp > 1) { 278 mant = mant << (iexp - 1); 279 } 280 281 *out++ = (x > 127) ? mant : -mant; 282 } 283 } 284 285 // static 286 void SoftG711::DecodeMLaw( 287 int16_t *out, const uint8_t *in, size_t inSize) { 288 while (inSize-- > 0) { 289 int32_t x = *in++; 290 291 int32_t mantissa = ~x; 292 int32_t exponent = (mantissa >> 4) & 7; 293 int32_t segment = exponent + 1; 294 mantissa &= 0x0f; 295 296 int32_t step = 4 << segment; 297 298 int32_t abs = (0x80l << exponent) + step * mantissa + step / 2 - 4 * 33; 299 300 *out++ = (x < 0x80) ? -abs : abs; 301 } 302 } 303 304 } // namespace android 305 306 android::SoftOMXComponent *createSoftOMXComponent( 307 const char *name, const OMX_CALLBACKTYPE *callbacks, 308 OMX_PTR appData, OMX_COMPONENTTYPE **component) { 309 return new android::SoftG711(name, callbacks, appData, component); 310 } 311 312