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 pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear; 121 pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF; 122 pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF; 123 124 pcmParams->nChannels = mNumChannels; 125 pcmParams->nSamplingRate = 8000; 126 127 return OMX_ErrorNone; 128 } 129 130 default: 131 return SimpleSoftOMXComponent::internalGetParameter(index, params); 132 } 133 } 134 135 OMX_ERRORTYPE SoftG711::internalSetParameter( 136 OMX_INDEXTYPE index, const OMX_PTR params) { 137 switch (index) { 138 case OMX_IndexParamAudioPcm: 139 { 140 OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams = 141 (OMX_AUDIO_PARAM_PCMMODETYPE *)params; 142 143 if (pcmParams->nPortIndex != 0) { 144 return OMX_ErrorUndefined; 145 } 146 147 if (pcmParams->nChannels < 1 || pcmParams->nChannels > 2) { 148 return OMX_ErrorUndefined; 149 } 150 151 mNumChannels = pcmParams->nChannels; 152 153 return OMX_ErrorNone; 154 } 155 156 case OMX_IndexParamStandardComponentRole: 157 { 158 const OMX_PARAM_COMPONENTROLETYPE *roleParams = 159 (const OMX_PARAM_COMPONENTROLETYPE *)params; 160 161 if (mIsMLaw) { 162 if (strncmp((const char *)roleParams->cRole, 163 "audio_decoder.g711mlaw", 164 OMX_MAX_STRINGNAME_SIZE - 1)) { 165 return OMX_ErrorUndefined; 166 } 167 } else { 168 if (strncmp((const char *)roleParams->cRole, 169 "audio_decoder.g711alaw", 170 OMX_MAX_STRINGNAME_SIZE - 1)) { 171 return OMX_ErrorUndefined; 172 } 173 } 174 175 return OMX_ErrorNone; 176 } 177 178 default: 179 return SimpleSoftOMXComponent::internalSetParameter(index, params); 180 } 181 } 182 183 void SoftG711::onQueueFilled(OMX_U32 portIndex) { 184 if (mSignalledError) { 185 return; 186 } 187 188 List<BufferInfo *> &inQueue = getPortQueue(0); 189 List<BufferInfo *> &outQueue = getPortQueue(1); 190 191 while (!inQueue.empty() && !outQueue.empty()) { 192 BufferInfo *inInfo = *inQueue.begin(); 193 OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader; 194 195 BufferInfo *outInfo = *outQueue.begin(); 196 OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader; 197 198 if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) { 199 inQueue.erase(inQueue.begin()); 200 inInfo->mOwnedByUs = false; 201 notifyEmptyBufferDone(inHeader); 202 203 outHeader->nFilledLen = 0; 204 outHeader->nFlags = OMX_BUFFERFLAG_EOS; 205 206 outQueue.erase(outQueue.begin()); 207 outInfo->mOwnedByUs = false; 208 notifyFillBufferDone(outHeader); 209 return; 210 } 211 212 if (inHeader->nFilledLen > kMaxNumSamplesPerFrame) { 213 LOGE("input buffer too large (%ld).", inHeader->nFilledLen); 214 215 notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL); 216 mSignalledError = true; 217 } 218 219 const uint8_t *inputptr = inHeader->pBuffer + inHeader->nOffset; 220 221 if (mIsMLaw) { 222 DecodeMLaw( 223 reinterpret_cast<int16_t *>(outHeader->pBuffer), 224 inputptr, inHeader->nFilledLen); 225 } else { 226 DecodeALaw( 227 reinterpret_cast<int16_t *>(outHeader->pBuffer), 228 inputptr, inHeader->nFilledLen); 229 } 230 231 outHeader->nTimeStamp = inHeader->nTimeStamp; 232 outHeader->nOffset = 0; 233 outHeader->nFilledLen = inHeader->nFilledLen * sizeof(int16_t); 234 outHeader->nFlags = 0; 235 236 inInfo->mOwnedByUs = false; 237 inQueue.erase(inQueue.begin()); 238 inInfo = NULL; 239 notifyEmptyBufferDone(inHeader); 240 inHeader = NULL; 241 242 outInfo->mOwnedByUs = false; 243 outQueue.erase(outQueue.begin()); 244 outInfo = NULL; 245 notifyFillBufferDone(outHeader); 246 outHeader = NULL; 247 } 248 } 249 250 // static 251 void SoftG711::DecodeALaw( 252 int16_t *out, const uint8_t *in, size_t inSize) { 253 while (inSize-- > 0) { 254 int32_t x = *in++; 255 256 int32_t ix = x ^ 0x55; 257 ix &= 0x7f; 258 259 int32_t iexp = ix >> 4; 260 int32_t mant = ix & 0x0f; 261 262 if (iexp > 0) { 263 mant += 16; 264 } 265 266 mant = (mant << 4) + 8; 267 268 if (iexp > 1) { 269 mant = mant << (iexp - 1); 270 } 271 272 *out++ = (x > 127) ? mant : -mant; 273 } 274 } 275 276 // static 277 void SoftG711::DecodeMLaw( 278 int16_t *out, const uint8_t *in, size_t inSize) { 279 while (inSize-- > 0) { 280 int32_t x = *in++; 281 282 int32_t mantissa = ~x; 283 int32_t exponent = (mantissa >> 4) & 7; 284 int32_t segment = exponent + 1; 285 mantissa &= 0x0f; 286 287 int32_t step = 4 << segment; 288 289 int32_t abs = (0x80l << exponent) + step * mantissa + step / 2 - 4 * 33; 290 291 *out++ = (x < 0x80) ? -abs : abs; 292 } 293 } 294 295 } // namespace android 296 297 android::SoftOMXComponent *createSoftOMXComponent( 298 const char *name, const OMX_CALLBACKTYPE *callbacks, 299 OMX_PTR appData, OMX_COMPONENTTYPE **component) { 300 return new android::SoftG711(name, callbacks, appData, component); 301 } 302 303
