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 26namespace android { 27 28template<class T> 29static 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 37SoftG711::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 mSignalledError(false), 45 mNumChannels(1), 46 mSamplingRate(8000) { 47 if (!strcmp(name, "OMX.google.g711.alaw.decoder")) { 48 mIsMLaw = false; 49 } else { 50 CHECK(!strcmp(name, "OMX.google.g711.mlaw.decoder")); 51 } 52 53 initPorts(); 54} 55 56SoftG711::~SoftG711() { 57} 58 59void SoftG711::initPorts() { 60 OMX_PARAM_PORTDEFINITIONTYPE def; 61 InitOMXParams(&def); 62 63 def.nPortIndex = 0; 64 def.eDir = OMX_DirInput; 65 def.nBufferCountMin = kNumBuffers; 66 def.nBufferCountActual = def.nBufferCountMin; 67 def.nBufferSize = 8192; 68 def.bEnabled = OMX_TRUE; 69 def.bPopulated = OMX_FALSE; 70 def.eDomain = OMX_PortDomainAudio; 71 def.bBuffersContiguous = OMX_FALSE; 72 def.nBufferAlignment = 1; 73 74 def.format.audio.cMIMEType = 75 const_cast<char *>( 76 mIsMLaw 77 ? MEDIA_MIMETYPE_AUDIO_G711_MLAW 78 : MEDIA_MIMETYPE_AUDIO_G711_ALAW); 79 80 def.format.audio.pNativeRender = NULL; 81 def.format.audio.bFlagErrorConcealment = OMX_FALSE; 82 def.format.audio.eEncoding = OMX_AUDIO_CodingG711; 83 84 addPort(def); 85 86 def.nPortIndex = 1; 87 def.eDir = OMX_DirOutput; 88 def.nBufferCountMin = kNumBuffers; 89 def.nBufferCountActual = def.nBufferCountMin; 90 def.nBufferSize = kMaxNumSamplesPerFrame * sizeof(int16_t); 91 def.bEnabled = OMX_TRUE; 92 def.bPopulated = OMX_FALSE; 93 def.eDomain = OMX_PortDomainAudio; 94 def.bBuffersContiguous = OMX_FALSE; 95 def.nBufferAlignment = 2; 96 97 def.format.audio.cMIMEType = const_cast<char *>("audio/raw"); 98 def.format.audio.pNativeRender = NULL; 99 def.format.audio.bFlagErrorConcealment = OMX_FALSE; 100 def.format.audio.eEncoding = OMX_AUDIO_CodingPCM; 101 102 addPort(def); 103} 104 105OMX_ERRORTYPE SoftG711::internalGetParameter( 106 OMX_INDEXTYPE index, OMX_PTR params) { 107 switch (index) { 108 case OMX_IndexParamAudioPcm: 109 { 110 OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams = 111 (OMX_AUDIO_PARAM_PCMMODETYPE *)params; 112 113 if (!isValidOMXParam(pcmParams)) { 114 return OMX_ErrorBadParameter; 115 } 116 117 if (pcmParams->nPortIndex > 1) { 118 return OMX_ErrorUndefined; 119 } 120 121 pcmParams->eNumData = OMX_NumericalDataSigned; 122 pcmParams->eEndian = OMX_EndianBig; 123 pcmParams->bInterleaved = OMX_TRUE; 124 pcmParams->nBitPerSample = 16; 125 if (pcmParams->nPortIndex == 0) { 126 // input port 127 pcmParams->ePCMMode = mIsMLaw ? OMX_AUDIO_PCMModeMULaw 128 : OMX_AUDIO_PCMModeALaw; 129 } else { 130 // output port 131 pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear; 132 } 133 pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF; 134 pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF; 135 136 pcmParams->nChannels = mNumChannels; 137 pcmParams->nSamplingRate = mSamplingRate; 138 139 return OMX_ErrorNone; 140 } 141 142 default: 143 return SimpleSoftOMXComponent::internalGetParameter(index, params); 144 } 145} 146 147OMX_ERRORTYPE SoftG711::internalSetParameter( 148 OMX_INDEXTYPE index, const OMX_PTR params) { 149 switch (index) { 150 case OMX_IndexParamAudioPcm: 151 { 152 OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams = 153 (OMX_AUDIO_PARAM_PCMMODETYPE *)params; 154 155 if (!isValidOMXParam(pcmParams)) { 156 return OMX_ErrorBadParameter; 157 } 158 159 if (pcmParams->nPortIndex != 0 && pcmParams->nPortIndex != 1) { 160 return OMX_ErrorUndefined; 161 } 162 163 if (pcmParams->nChannels < 1 || pcmParams->nChannels > 2) { 164 return OMX_ErrorUndefined; 165 } 166 167 if(pcmParams->nPortIndex == 0) { 168 mNumChannels = pcmParams->nChannels; 169 } 170 171 mSamplingRate = pcmParams->nSamplingRate; 172 173 return OMX_ErrorNone; 174 } 175 176 case OMX_IndexParamStandardComponentRole: 177 { 178 const OMX_PARAM_COMPONENTROLETYPE *roleParams = 179 (const OMX_PARAM_COMPONENTROLETYPE *)params; 180 181 if (!isValidOMXParam(roleParams)) { 182 return OMX_ErrorBadParameter; 183 } 184 185 if (mIsMLaw) { 186 if (strncmp((const char *)roleParams->cRole, 187 "audio_decoder.g711mlaw", 188 OMX_MAX_STRINGNAME_SIZE - 1)) { 189 return OMX_ErrorUndefined; 190 } 191 } else { 192 if (strncmp((const char *)roleParams->cRole, 193 "audio_decoder.g711alaw", 194 OMX_MAX_STRINGNAME_SIZE - 1)) { 195 return OMX_ErrorUndefined; 196 } 197 } 198 199 return OMX_ErrorNone; 200 } 201 202 default: 203 return SimpleSoftOMXComponent::internalSetParameter(index, params); 204 } 205} 206 207void SoftG711::onQueueFilled(OMX_U32 /* portIndex */) { 208 if (mSignalledError) { 209 return; 210 } 211 212 List<BufferInfo *> &inQueue = getPortQueue(0); 213 List<BufferInfo *> &outQueue = getPortQueue(1); 214 215 while (!inQueue.empty() && !outQueue.empty()) { 216 BufferInfo *inInfo = *inQueue.begin(); 217 OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader; 218 219 BufferInfo *outInfo = *outQueue.begin(); 220 OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader; 221 222 if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) { 223 inQueue.erase(inQueue.begin()); 224 inInfo->mOwnedByUs = false; 225 notifyEmptyBufferDone(inHeader); 226 227 outHeader->nFilledLen = 0; 228 outHeader->nFlags = OMX_BUFFERFLAG_EOS; 229 230 outQueue.erase(outQueue.begin()); 231 outInfo->mOwnedByUs = false; 232 notifyFillBufferDone(outHeader); 233 return; 234 } 235 236 if (inHeader->nFilledLen > kMaxNumSamplesPerFrame) { 237 ALOGE("input buffer too large (%d).", inHeader->nFilledLen); 238 239 notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL); 240 mSignalledError = true; 241 } 242 243 if (inHeader->nFilledLen * sizeof(int16_t) > outHeader->nAllocLen) { 244 ALOGE("output buffer too small (%d).", outHeader->nAllocLen); 245 android_errorWriteLog(0x534e4554, "27793163"); 246 247 notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL); 248 mSignalledError = true; 249 return; 250 } 251 252 const uint8_t *inputptr = inHeader->pBuffer + inHeader->nOffset; 253 254 if (mIsMLaw) { 255 DecodeMLaw( 256 reinterpret_cast<int16_t *>(outHeader->pBuffer), 257 inputptr, inHeader->nFilledLen); 258 } else { 259 DecodeALaw( 260 reinterpret_cast<int16_t *>(outHeader->pBuffer), 261 inputptr, inHeader->nFilledLen); 262 } 263 264 outHeader->nTimeStamp = inHeader->nTimeStamp; 265 outHeader->nOffset = 0; 266 outHeader->nFilledLen = inHeader->nFilledLen * sizeof(int16_t); 267 outHeader->nFlags = 0; 268 269 inInfo->mOwnedByUs = false; 270 inQueue.erase(inQueue.begin()); 271 inInfo = NULL; 272 notifyEmptyBufferDone(inHeader); 273 inHeader = NULL; 274 275 outInfo->mOwnedByUs = false; 276 outQueue.erase(outQueue.begin()); 277 outInfo = NULL; 278 notifyFillBufferDone(outHeader); 279 outHeader = NULL; 280 } 281} 282 283// static 284void SoftG711::DecodeALaw( 285 int16_t *out, const uint8_t *in, size_t inSize) { 286 while (inSize > 0) { 287 inSize--; 288 int32_t x = *in++; 289 290 int32_t ix = x ^ 0x55; 291 ix &= 0x7f; 292 293 int32_t iexp = ix >> 4; 294 int32_t mant = ix & 0x0f; 295 296 if (iexp > 0) { 297 mant += 16; 298 } 299 300 mant = (mant << 4) + 8; 301 302 if (iexp > 1) { 303 mant = mant << (iexp - 1); 304 } 305 306 *out++ = (x > 127) ? mant : -mant; 307 } 308} 309 310// static 311void SoftG711::DecodeMLaw( 312 int16_t *out, const uint8_t *in, size_t inSize) { 313 while (inSize > 0) { 314 inSize--; 315 int32_t x = *in++; 316 317 int32_t mantissa = ~x; 318 int32_t exponent = (mantissa >> 4) & 7; 319 int32_t segment = exponent + 1; 320 mantissa &= 0x0f; 321 322 int32_t step = 4 << segment; 323 324 int32_t abs = (0x80l << exponent) + step * mantissa + step / 2 - 4 * 33; 325 326 *out++ = (x < 0x80) ? -abs : abs; 327 } 328} 329 330} // namespace android 331 332android::SoftOMXComponent *createSoftOMXComponent( 333 const char *name, const OMX_CALLBACKTYPE *callbacks, 334 OMX_PTR appData, OMX_COMPONENTTYPE **component) { 335 return new android::SoftG711(name, callbacks, appData, component); 336} 337 338