SoftAAC2.cpp revision 3748b71a7fe73b0365a93f1fd28ced14219f85e5 
1/*
2 * Copyright (C) 2012 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_TAG "SoftAAC2"
18#include <utils/Log.h>
19
20#include "SoftAAC2.h"
21
22#include <media/stagefright/foundation/ADebug.h>
23#include <media/stagefright/foundation/hexdump.h>
24
25#define FILEREAD_MAX_LAYERS 2
26
27namespace android {
28
29template<class T>
30static void InitOMXParams(T *params) {
31    params->nSize = sizeof(T);
32    params->nVersion.s.nVersionMajor = 1;
33    params->nVersion.s.nVersionMinor = 0;
34    params->nVersion.s.nRevision = 0;
35    params->nVersion.s.nStep = 0;
36}
37
38SoftAAC2::SoftAAC2(
39        const char *name,
40        const OMX_CALLBACKTYPE *callbacks,
41        OMX_PTR appData,
42        OMX_COMPONENTTYPE **component)
43    : SimpleSoftOMXComponent(name, callbacks, appData, component),
44      mAACDecoder(NULL),
45      mStreamInfo(NULL),
46      mIsADTS(false),
47      mInputBufferCount(0),
48      mSignalledError(false),
49      mAnchorTimeUs(0),
50      mNumSamplesOutput(0),
51      mOutputPortSettingsChange(NONE) {
52    initPorts();
53    CHECK_EQ(initDecoder(), (status_t)OK);
54}
55
56SoftAAC2::~SoftAAC2() {
57    aacDecoder_Close(mAACDecoder);
58}
59
60void SoftAAC2::initPorts() {
61    OMX_PARAM_PORTDEFINITIONTYPE def;
62    InitOMXParams(&def);
63
64    def.nPortIndex = 0;
65    def.eDir = OMX_DirInput;
66    def.nBufferCountMin = kNumInputBuffers;
67    def.nBufferCountActual = def.nBufferCountMin;
68    def.nBufferSize = 8192;
69    def.bEnabled = OMX_TRUE;
70    def.bPopulated = OMX_FALSE;
71    def.eDomain = OMX_PortDomainAudio;
72    def.bBuffersContiguous = OMX_FALSE;
73    def.nBufferAlignment = 1;
74
75    def.format.audio.cMIMEType = const_cast<char *>("audio/aac");
76    def.format.audio.pNativeRender = NULL;
77    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
78    def.format.audio.eEncoding = OMX_AUDIO_CodingAAC;
79
80    addPort(def);
81
82    def.nPortIndex = 1;
83    def.eDir = OMX_DirOutput;
84    def.nBufferCountMin = kNumOutputBuffers;
85    def.nBufferCountActual = def.nBufferCountMin;
86    def.nBufferSize = 8192 * 2;
87    def.bEnabled = OMX_TRUE;
88    def.bPopulated = OMX_FALSE;
89    def.eDomain = OMX_PortDomainAudio;
90    def.bBuffersContiguous = OMX_FALSE;
91    def.nBufferAlignment = 2;
92
93    def.format.audio.cMIMEType = const_cast<char *>("audio/raw");
94    def.format.audio.pNativeRender = NULL;
95    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
96    def.format.audio.eEncoding = OMX_AUDIO_CodingPCM;
97
98    addPort(def);
99}
100
101status_t SoftAAC2::initDecoder() {
102    status_t status = UNKNOWN_ERROR;
103    mAACDecoder = aacDecoder_Open(TT_MP4_ADIF, /* num layers */ 1);
104    if (mAACDecoder != NULL) {
105        mStreamInfo = aacDecoder_GetStreamInfo(mAACDecoder);
106        if (mStreamInfo != NULL) {
107            status = OK;
108        }
109    }
110    mIsFirst = true;
111    return status;
112}
113
114OMX_ERRORTYPE SoftAAC2::internalGetParameter(
115        OMX_INDEXTYPE index, OMX_PTR params) {
116    switch (index) {
117        case OMX_IndexParamAudioAac:
118        {
119            OMX_AUDIO_PARAM_AACPROFILETYPE *aacParams =
120                (OMX_AUDIO_PARAM_AACPROFILETYPE *)params;
121
122            if (aacParams->nPortIndex != 0) {
123                return OMX_ErrorUndefined;
124            }
125
126            aacParams->nBitRate = 0;
127            aacParams->nAudioBandWidth = 0;
128            aacParams->nAACtools = 0;
129            aacParams->nAACERtools = 0;
130            aacParams->eAACProfile = OMX_AUDIO_AACObjectMain;
131
132            aacParams->eAACStreamFormat =
133                mIsADTS
134                    ? OMX_AUDIO_AACStreamFormatMP4ADTS
135                    : OMX_AUDIO_AACStreamFormatMP4FF;
136
137            aacParams->eChannelMode = OMX_AUDIO_ChannelModeStereo;
138
139            if (!isConfigured()) {
140                aacParams->nChannels = 1;
141                aacParams->nSampleRate = 44100;
142                aacParams->nFrameLength = 0;
143            } else {
144                aacParams->nChannels = mStreamInfo->numChannels;
145                aacParams->nSampleRate = mStreamInfo->sampleRate;
146                aacParams->nFrameLength = mStreamInfo->frameSize;
147            }
148
149            return OMX_ErrorNone;
150        }
151
152        case OMX_IndexParamAudioPcm:
153        {
154            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
155                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;
156
157            if (pcmParams->nPortIndex != 1) {
158                return OMX_ErrorUndefined;
159            }
160
161            pcmParams->eNumData = OMX_NumericalDataSigned;
162            pcmParams->eEndian = OMX_EndianBig;
163            pcmParams->bInterleaved = OMX_TRUE;
164            pcmParams->nBitPerSample = 16;
165            pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear;
166            pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF;
167            pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF;
168            pcmParams->eChannelMapping[2] = OMX_AUDIO_ChannelCF;
169            pcmParams->eChannelMapping[3] = OMX_AUDIO_ChannelLFE;
170            pcmParams->eChannelMapping[4] = OMX_AUDIO_ChannelLS;
171            pcmParams->eChannelMapping[5] = OMX_AUDIO_ChannelRS;
172
173            if (!isConfigured()) {
174                pcmParams->nChannels = 1;
175                pcmParams->nSamplingRate = 44100;
176            } else {
177                pcmParams->nChannels = mStreamInfo->numChannels;
178                pcmParams->nSamplingRate = mStreamInfo->sampleRate;
179                ALOGI("Sampling rate: %lu, channels: %lu",
180                      pcmParams->nSamplingRate,
181                      pcmParams->nChannels);
182            }
183
184            return OMX_ErrorNone;
185        }
186
187        default:
188            return SimpleSoftOMXComponent::internalGetParameter(index, params);
189    }
190
191}
192
193OMX_ERRORTYPE SoftAAC2::internalSetParameter(
194        OMX_INDEXTYPE index, const OMX_PTR params) {
195    switch (index) {
196        case OMX_IndexParamStandardComponentRole:
197        {
198            const OMX_PARAM_COMPONENTROLETYPE *roleParams =
199                (const OMX_PARAM_COMPONENTROLETYPE *)params;
200
201            if (strncmp((const char *)roleParams->cRole,
202                        "audio_decoder.aac",
203                        OMX_MAX_STRINGNAME_SIZE - 1)) {
204                return OMX_ErrorUndefined;
205            }
206
207            return OMX_ErrorNone;
208        }
209
210        case OMX_IndexParamAudioAac:
211        {
212            const OMX_AUDIO_PARAM_AACPROFILETYPE *aacParams =
213                (const OMX_AUDIO_PARAM_AACPROFILETYPE *)params;
214
215            if (aacParams->nPortIndex != 0) {
216                return OMX_ErrorUndefined;
217            }
218
219            if (aacParams->eAACStreamFormat == OMX_AUDIO_AACStreamFormatMP4FF) {
220                mIsADTS = false;
221            } else if (aacParams->eAACStreamFormat
222                        == OMX_AUDIO_AACStreamFormatMP4ADTS) {
223                mIsADTS = true;
224            } else {
225                return OMX_ErrorUndefined;
226            }
227
228            return OMX_ErrorNone;
229        }
230
231        case OMX_IndexParamAudioPcm:
232        {
233            const OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
234                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;
235
236            if (pcmParams->nPortIndex != 1) {
237                return OMX_ErrorUndefined;
238            }
239
240            return OMX_ErrorNone;
241        }
242
243        default:
244            return SimpleSoftOMXComponent::internalSetParameter(index, params);
245    }
246}
247
248bool SoftAAC2::isConfigured() const {
249    return mInputBufferCount > 0;
250}
251
252void SoftAAC2::onQueueFilled(OMX_U32 portIndex) {
253    if (mSignalledError || mOutputPortSettingsChange != NONE) {
254        return;
255    }
256
257    UCHAR* inBuffer[FILEREAD_MAX_LAYERS];
258    UINT inBufferLength[FILEREAD_MAX_LAYERS] = {0};
259    UINT bytesValid[FILEREAD_MAX_LAYERS] = {0};
260
261    List<BufferInfo *> &inQueue = getPortQueue(0);
262    List<BufferInfo *> &outQueue = getPortQueue(1);
263
264    if (portIndex == 0 && mInputBufferCount == 0) {
265        ++mInputBufferCount;
266        BufferInfo *info = *inQueue.begin();
267        OMX_BUFFERHEADERTYPE *header = info->mHeader;
268
269        inBuffer[0] = header->pBuffer + header->nOffset;
270        inBufferLength[0] = header->nFilledLen;
271
272        AAC_DECODER_ERROR decoderErr =
273            aacDecoder_ConfigRaw(mAACDecoder,
274                                 inBuffer,
275                                 inBufferLength);
276
277        if (decoderErr != AAC_DEC_OK) {
278            mSignalledError = true;
279            notify(OMX_EventError, OMX_ErrorUndefined, decoderErr, NULL);
280            return;
281        }
282        inQueue.erase(inQueue.begin());
283        info->mOwnedByUs = false;
284        notifyEmptyBufferDone(header);
285
286        notify(OMX_EventPortSettingsChanged, 1, 0, NULL);
287        mOutputPortSettingsChange = AWAITING_DISABLED;
288        return;
289    }
290
291    while (!inQueue.empty() && !outQueue.empty()) {
292        BufferInfo *inInfo = *inQueue.begin();
293        OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader;
294
295        BufferInfo *outInfo = *outQueue.begin();
296        OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader;
297
298        if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) {
299            inQueue.erase(inQueue.begin());
300            inInfo->mOwnedByUs = false;
301            notifyEmptyBufferDone(inHeader);
302
303            // flush out the decoder's delayed data by calling DecodeFrame one more time, with
304            // the AACDEC_FLUSH flag set
305            INT_PCM *outBuffer =
306                    reinterpret_cast<INT_PCM *>(outHeader->pBuffer + outHeader->nOffset);
307            AAC_DECODER_ERROR decoderErr = aacDecoder_DecodeFrame(mAACDecoder,
308                                                                  outBuffer,
309                                                                  outHeader->nAllocLen,
310                                                                  AACDEC_FLUSH);
311            if (decoderErr != AAC_DEC_OK) {
312                mSignalledError = true;
313                notify(OMX_EventError, OMX_ErrorUndefined, decoderErr, NULL);
314                return;
315            }
316
317            outHeader->nFilledLen =
318                    mStreamInfo->frameSize * sizeof(int16_t) * mStreamInfo->numChannels;
319            outHeader->nFlags = OMX_BUFFERFLAG_EOS;
320
321            outQueue.erase(outQueue.begin());
322            outInfo->mOwnedByUs = false;
323            notifyFillBufferDone(outHeader);
324            return;
325        }
326
327        if (inHeader->nOffset == 0) {
328            mAnchorTimeUs = inHeader->nTimeStamp;
329            mNumSamplesOutput = 0;
330        }
331
332        size_t adtsHeaderSize = 0;
333        if (mIsADTS) {
334            // skip 30 bits, aac_frame_length follows.
335            // ssssssss ssssiiip ppffffPc ccohCCll llllllll lll?????
336
337            const uint8_t *adtsHeader = inHeader->pBuffer + inHeader->nOffset;
338
339            CHECK_GE(inHeader->nFilledLen, 7);
340
341            bool protectionAbsent = (adtsHeader[1] & 1);
342
343            unsigned aac_frame_length =
344                ((adtsHeader[3] & 3) << 11)
345                | (adtsHeader[4] << 3)
346                | (adtsHeader[5] >> 5);
347
348            CHECK_GE(inHeader->nFilledLen, aac_frame_length);
349
350            adtsHeaderSize = (protectionAbsent ? 7 : 9);
351
352            inBuffer[0] = (UCHAR *)adtsHeader + adtsHeaderSize;
353            inBufferLength[0] = aac_frame_length - adtsHeaderSize;
354
355            inHeader->nOffset += adtsHeaderSize;
356            inHeader->nFilledLen -= adtsHeaderSize;
357        } else {
358            inBuffer[0] = inHeader->pBuffer + inHeader->nOffset;
359            inBufferLength[0] = inHeader->nFilledLen;
360        }
361
362        // Fill and decode
363        INT_PCM *outBuffer = reinterpret_cast<INT_PCM *>(outHeader->pBuffer + outHeader->nOffset);
364        bytesValid[0] = inBufferLength[0];
365
366        int prevSampleRate = mStreamInfo->sampleRate;
367        int prevNumChannels = mStreamInfo->numChannels;
368
369        AAC_DECODER_ERROR decoderErr = AAC_DEC_NOT_ENOUGH_BITS;
370        while (bytesValid[0] > 0 && decoderErr == AAC_DEC_NOT_ENOUGH_BITS) {
371            aacDecoder_Fill(mAACDecoder,
372                            inBuffer,
373                            inBufferLength,
374                            bytesValid);
375
376            decoderErr = aacDecoder_DecodeFrame(mAACDecoder,
377                                                outBuffer,
378                                                outHeader->nAllocLen,
379                                                0 /* flags */);
380
381        }
382
383        // Check if stream info has changed
384        if (mStreamInfo->sampleRate != prevSampleRate ||
385            mStreamInfo->numChannels != prevNumChannels) {
386            // We're going to want to revisit this input buffer, but
387            // may have already advanced the offset. Undo that if
388            // necessary.
389            inHeader->nOffset -= adtsHeaderSize;
390            inHeader->nFilledLen += adtsHeaderSize;
391
392            notify(OMX_EventPortSettingsChanged, 1, 0, NULL);
393            mOutputPortSettingsChange = AWAITING_DISABLED;
394            return;
395        }
396
397        size_t numOutBytes =
398            mStreamInfo->frameSize * sizeof(int16_t) * mStreamInfo->numChannels;
399
400        if (decoderErr == AAC_DEC_OK) {
401            UINT inBufferUsedLength = inBufferLength[0] - bytesValid[0];
402            inHeader->nFilledLen -= inBufferUsedLength;
403            inHeader->nOffset += inBufferUsedLength;
404        } else {
405            ALOGW("AAC decoder returned error %d, substituting silence",
406                  decoderErr);
407
408            memset(outHeader->pBuffer + outHeader->nOffset, 0, numOutBytes);
409
410            // Discard input buffer.
411            inHeader->nFilledLen = 0;
412
413            aacDecoder_SetParam(mAACDecoder, AAC_TPDEC_CLEAR_BUFFER, 1);
414
415            // fall through
416        }
417
418        if (decoderErr == AAC_DEC_OK || mNumSamplesOutput > 0) {
419            // We'll only output data if we successfully decoded it or
420            // we've previously decoded valid data, in the latter case
421            // (decode failed) we'll output a silent frame.
422            if (mIsFirst) {
423                mIsFirst = false;
424                // the first decoded frame should be discarded to account for decoder delay
425                numOutBytes = 0;
426            }
427
428            outHeader->nFilledLen = numOutBytes;
429            outHeader->nFlags = 0;
430
431            outHeader->nTimeStamp =
432                mAnchorTimeUs
433                    + (mNumSamplesOutput * 1000000ll) / mStreamInfo->sampleRate;
434
435            mNumSamplesOutput += mStreamInfo->frameSize;
436
437            outInfo->mOwnedByUs = false;
438            outQueue.erase(outQueue.begin());
439            outInfo = NULL;
440            notifyFillBufferDone(outHeader);
441            outHeader = NULL;
442        }
443
444        if (inHeader->nFilledLen == 0) {
445            inInfo->mOwnedByUs = false;
446            inQueue.erase(inQueue.begin());
447            inInfo = NULL;
448            notifyEmptyBufferDone(inHeader);
449            inHeader = NULL;
450        }
451
452        if (decoderErr == AAC_DEC_OK) {
453            ++mInputBufferCount;
454        }
455    }
456}
457
458void SoftAAC2::onPortFlushCompleted(OMX_U32 portIndex) {
459    if (portIndex == 0) {
460        // Make sure that the next buffer output does not still
461        // depend on fragments from the last one decoded.
462        aacDecoder_SetParam(mAACDecoder, AAC_TPDEC_CLEAR_BUFFER, 1);
463        mIsFirst = true;
464    }
465}
466
467void SoftAAC2::onPortEnableCompleted(OMX_U32 portIndex, bool enabled) {
468    if (portIndex != 1) {
469        return;
470    }
471
472    switch (mOutputPortSettingsChange) {
473        case NONE:
474            break;
475
476        case AWAITING_DISABLED:
477        {
478            CHECK(!enabled);
479            mOutputPortSettingsChange = AWAITING_ENABLED;
480            break;
481        }
482
483        default:
484        {
485            CHECK_EQ((int)mOutputPortSettingsChange, (int)AWAITING_ENABLED);
486            CHECK(enabled);
487            mOutputPortSettingsChange = NONE;
488            break;
489        }
490    }
491}
492
493}  // namespace android
494
495android::SoftOMXComponent *createSoftOMXComponent(
496        const char *name, const OMX_CALLBACKTYPE *callbacks,
497        OMX_PTR appData, OMX_COMPONENTTYPE **component) {
498    return new android::SoftAAC2(name, callbacks, appData, component);
499}
500