SoftMP3.cpp revision 2242fbd1d9327dff9c25ac2aba0fa7d5d471bb88 
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 "SoftMP3"
19#include <utils/Log.h>
20
21#include "SoftMP3.h"
22
23#include <media/stagefright/foundation/ADebug.h>
24#include <media/stagefright/MediaDefs.h>
25
26#include "include/pvmp3decoder_api.h"
27
28namespace android {
29
30template<class T>
31static void InitOMXParams(T *params) {
32    params->nSize = sizeof(T);
33    params->nVersion.s.nVersionMajor = 1;
34    params->nVersion.s.nVersionMinor = 0;
35    params->nVersion.s.nRevision = 0;
36    params->nVersion.s.nStep = 0;
37}
38
39SoftMP3::SoftMP3(
40        const char *name,
41        const OMX_CALLBACKTYPE *callbacks,
42        OMX_PTR appData,
43        OMX_COMPONENTTYPE **component)
44    : SimpleSoftOMXComponent(name, callbacks, appData, component),
45      mConfig(new tPVMP3DecoderExternal),
46      mDecoderBuf(NULL),
47      mAnchorTimeUs(0),
48      mNumFramesOutput(0),
49      mNumChannels(2),
50      mSamplingRate(44100),
51      mSignalledError(false),
52      mOutputPortSettingsChange(NONE) {
53    initPorts();
54    initDecoder();
55}
56
57SoftMP3::~SoftMP3() {
58    if (mDecoderBuf != NULL) {
59        free(mDecoderBuf);
60        mDecoderBuf = NULL;
61    }
62
63    delete mConfig;
64    mConfig = NULL;
65}
66
67void SoftMP3::initPorts() {
68    OMX_PARAM_PORTDEFINITIONTYPE def;
69    InitOMXParams(&def);
70
71    def.nPortIndex = 0;
72    def.eDir = OMX_DirInput;
73    def.nBufferCountMin = kNumBuffers;
74    def.nBufferCountActual = def.nBufferCountMin;
75    def.nBufferSize = 8192;
76    def.bEnabled = OMX_TRUE;
77    def.bPopulated = OMX_FALSE;
78    def.eDomain = OMX_PortDomainAudio;
79    def.bBuffersContiguous = OMX_FALSE;
80    def.nBufferAlignment = 1;
81
82    def.format.audio.cMIMEType =
83        const_cast<char *>(MEDIA_MIMETYPE_AUDIO_MPEG);
84
85    def.format.audio.pNativeRender = NULL;
86    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
87    def.format.audio.eEncoding = OMX_AUDIO_CodingMP3;
88
89    addPort(def);
90
91    def.nPortIndex = 1;
92    def.eDir = OMX_DirOutput;
93    def.nBufferCountMin = kNumBuffers;
94    def.nBufferCountActual = def.nBufferCountMin;
95    def.nBufferSize = kOutputBufferSize;
96    def.bEnabled = OMX_TRUE;
97    def.bPopulated = OMX_FALSE;
98    def.eDomain = OMX_PortDomainAudio;
99    def.bBuffersContiguous = OMX_FALSE;
100    def.nBufferAlignment = 2;
101
102    def.format.audio.cMIMEType = const_cast<char *>("audio/raw");
103    def.format.audio.pNativeRender = NULL;
104    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
105    def.format.audio.eEncoding = OMX_AUDIO_CodingPCM;
106
107    addPort(def);
108}
109
110void SoftMP3::initDecoder() {
111    mConfig->equalizerType = flat;
112    mConfig->crcEnabled = false;
113
114    uint32_t memRequirements = pvmp3_decoderMemRequirements();
115    mDecoderBuf = malloc(memRequirements);
116
117    pvmp3_InitDecoder(mConfig, mDecoderBuf);
118    mIsFirst = true;
119}
120
121OMX_ERRORTYPE SoftMP3::internalGetParameter(
122        OMX_INDEXTYPE index, OMX_PTR params) {
123    switch (index) {
124        case OMX_IndexParamAudioPcm:
125        {
126            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
127                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;
128
129            if (pcmParams->nPortIndex > 1) {
130                return OMX_ErrorUndefined;
131            }
132
133            pcmParams->eNumData = OMX_NumericalDataSigned;
134            pcmParams->eEndian = OMX_EndianBig;
135            pcmParams->bInterleaved = OMX_TRUE;
136            pcmParams->nBitPerSample = 16;
137            pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear;
138            pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF;
139            pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF;
140
141            pcmParams->nChannels = mNumChannels;
142            pcmParams->nSamplingRate = mSamplingRate;
143
144            return OMX_ErrorNone;
145        }
146
147        default:
148            return SimpleSoftOMXComponent::internalGetParameter(index, params);
149    }
150}
151
152OMX_ERRORTYPE SoftMP3::internalSetParameter(
153        OMX_INDEXTYPE index, const OMX_PTR params) {
154    switch (index) {
155        case OMX_IndexParamStandardComponentRole:
156        {
157            const OMX_PARAM_COMPONENTROLETYPE *roleParams =
158                (const OMX_PARAM_COMPONENTROLETYPE *)params;
159
160            if (strncmp((const char *)roleParams->cRole,
161                        "audio_decoder.mp3",
162                        OMX_MAX_STRINGNAME_SIZE - 1)) {
163                return OMX_ErrorUndefined;
164            }
165
166            return OMX_ErrorNone;
167        }
168
169        case OMX_IndexParamAudioPcm:
170        {
171            const OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
172                (const OMX_AUDIO_PARAM_PCMMODETYPE *)params;
173
174            if (pcmParams->nPortIndex != 1) {
175                return OMX_ErrorUndefined;
176            }
177
178            mNumChannels = pcmParams->nChannels;
179            mSamplingRate = pcmParams->nSamplingRate;
180
181            return OMX_ErrorNone;
182        }
183
184        default:
185            return SimpleSoftOMXComponent::internalSetParameter(index, params);
186    }
187}
188
189void SoftMP3::onQueueFilled(OMX_U32 portIndex) {
190    if (mSignalledError || mOutputPortSettingsChange != NONE) {
191        return;
192    }
193
194    List<BufferInfo *> &inQueue = getPortQueue(0);
195    List<BufferInfo *> &outQueue = getPortQueue(1);
196
197    while (!inQueue.empty() && !outQueue.empty()) {
198        BufferInfo *inInfo = *inQueue.begin();
199        OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader;
200
201        BufferInfo *outInfo = *outQueue.begin();
202        OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader;
203
204        if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) {
205            inQueue.erase(inQueue.begin());
206            inInfo->mOwnedByUs = false;
207            notifyEmptyBufferDone(inHeader);
208
209            if (!mIsFirst) {
210                // pad the end of the stream with 529 samples, since that many samples
211                // were trimmed off the beginning when decoding started
212                outHeader->nFilledLen =
213                    kPVMP3DecoderDelay * mNumChannels * sizeof(int16_t);
214
215                memset(outHeader->pBuffer, 0, outHeader->nFilledLen);
216            } else {
217                // Since we never discarded frames from the start, we won't have
218                // to add any padding at the end either.
219                outHeader->nFilledLen = 0;
220            }
221
222            outHeader->nFlags = OMX_BUFFERFLAG_EOS;
223
224            outQueue.erase(outQueue.begin());
225            outInfo->mOwnedByUs = false;
226            notifyFillBufferDone(outHeader);
227            return;
228        }
229
230        if (inHeader->nOffset == 0) {
231            mAnchorTimeUs = inHeader->nTimeStamp;
232            mNumFramesOutput = 0;
233        }
234
235        mConfig->pInputBuffer =
236            inHeader->pBuffer + inHeader->nOffset;
237
238        mConfig->inputBufferCurrentLength = inHeader->nFilledLen;
239        mConfig->inputBufferMaxLength = 0;
240        mConfig->inputBufferUsedLength = 0;
241
242        mConfig->outputFrameSize = kOutputBufferSize / sizeof(int16_t);
243
244        mConfig->pOutputBuffer =
245            reinterpret_cast<int16_t *>(outHeader->pBuffer);
246
247        ERROR_CODE decoderErr;
248        if ((decoderErr = pvmp3_framedecoder(mConfig, mDecoderBuf))
249                != NO_DECODING_ERROR) {
250            ALOGV("mp3 decoder returned error %d", decoderErr);
251
252            if (decoderErr != NO_ENOUGH_MAIN_DATA_ERROR
253                        && decoderErr != SIDE_INFO_ERROR) {
254                ALOGE("mp3 decoder returned error %d", decoderErr);
255
256                notify(OMX_EventError, OMX_ErrorUndefined, decoderErr, NULL);
257                mSignalledError = true;
258                return;
259            }
260
261            if (mConfig->outputFrameSize == 0) {
262                mConfig->outputFrameSize = kOutputBufferSize / sizeof(int16_t);
263            }
264
265            // This is recoverable, just ignore the current frame and
266            // play silence instead.
267            memset(outHeader->pBuffer,
268                   0,
269                   mConfig->outputFrameSize * sizeof(int16_t));
270
271            mConfig->inputBufferUsedLength = inHeader->nFilledLen;
272        } else if (mConfig->samplingRate != mSamplingRate
273                || mConfig->num_channels != mNumChannels) {
274            mSamplingRate = mConfig->samplingRate;
275            mNumChannels = mConfig->num_channels;
276
277            notify(OMX_EventPortSettingsChanged, 1, 0, NULL);
278            mOutputPortSettingsChange = AWAITING_DISABLED;
279            return;
280        }
281
282        if (mIsFirst) {
283            mIsFirst = false;
284            // The decoder delay is 529 samples, so trim that many samples off
285            // the start of the first output buffer. This essentially makes this
286            // decoder have zero delay, which the rest of the pipeline assumes.
287            outHeader->nOffset =
288                kPVMP3DecoderDelay * mNumChannels * sizeof(int16_t);
289
290            outHeader->nFilledLen =
291                mConfig->outputFrameSize * sizeof(int16_t) - outHeader->nOffset;
292        } else {
293            outHeader->nOffset = 0;
294            outHeader->nFilledLen = mConfig->outputFrameSize * sizeof(int16_t);
295        }
296
297        outHeader->nTimeStamp =
298            mAnchorTimeUs
299                + (mNumFramesOutput * 1000000ll) / mConfig->samplingRate;
300
301        outHeader->nFlags = 0;
302
303        CHECK_GE(inHeader->nFilledLen, mConfig->inputBufferUsedLength);
304
305        inHeader->nOffset += mConfig->inputBufferUsedLength;
306        inHeader->nFilledLen -= mConfig->inputBufferUsedLength;
307
308        mNumFramesOutput += mConfig->outputFrameSize / mNumChannels;
309
310        if (inHeader->nFilledLen == 0) {
311            inInfo->mOwnedByUs = false;
312            inQueue.erase(inQueue.begin());
313            inInfo = NULL;
314            notifyEmptyBufferDone(inHeader);
315            inHeader = NULL;
316        }
317
318        outInfo->mOwnedByUs = false;
319        outQueue.erase(outQueue.begin());
320        outInfo = NULL;
321        notifyFillBufferDone(outHeader);
322        outHeader = NULL;
323    }
324}
325
326void SoftMP3::onPortFlushCompleted(OMX_U32 portIndex) {
327    if (portIndex == 0) {
328        // Make sure that the next buffer output does not still
329        // depend on fragments from the last one decoded.
330        pvmp3_InitDecoder(mConfig, mDecoderBuf);
331        mIsFirst = true;
332    }
333}
334
335void SoftMP3::onPortEnableCompleted(OMX_U32 portIndex, bool enabled) {
336    if (portIndex != 1) {
337        return;
338    }
339
340    switch (mOutputPortSettingsChange) {
341        case NONE:
342            break;
343
344        case AWAITING_DISABLED:
345        {
346            CHECK(!enabled);
347            mOutputPortSettingsChange = AWAITING_ENABLED;
348            break;
349        }
350
351        default:
352        {
353            CHECK_EQ((int)mOutputPortSettingsChange, (int)AWAITING_ENABLED);
354            CHECK(enabled);
355            mOutputPortSettingsChange = NONE;
356            break;
357        }
358    }
359}
360
361void SoftMP3::onReset() {
362    pvmp3_InitDecoder(mConfig, mDecoderBuf);
363    mIsFirst = true;
364}
365
366}  // namespace android
367
368android::SoftOMXComponent *createSoftOMXComponent(
369        const char *name, const OMX_CALLBACKTYPE *callbacks,
370        OMX_PTR appData, OMX_COMPONENTTYPE **component) {
371    return new android::SoftMP3(name, callbacks, appData, component);
372}
373