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_IndexParamAudioPortFormat:
109        {
110            OMX_AUDIO_PARAM_PORTFORMATTYPE *formatParams =
111                (OMX_AUDIO_PARAM_PORTFORMATTYPE *)params;
112
113            if (!isValidOMXParam(formatParams)) {
114                return OMX_ErrorBadParameter;
115            }
116
117            if (formatParams->nPortIndex > 1) {
118                return OMX_ErrorUndefined;
119            }
120
121            if (formatParams->nIndex > 0) {
122                return OMX_ErrorNoMore;
123            }
124
125            formatParams->eEncoding =
126                (formatParams->nPortIndex == 0)
127                    ? OMX_AUDIO_CodingG711 : OMX_AUDIO_CodingPCM;
128
129            return OMX_ErrorNone;
130        }
131
132        case OMX_IndexParamAudioPcm:
133        {
134            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
135                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;
136
137            if (!isValidOMXParam(pcmParams)) {
138                return OMX_ErrorBadParameter;
139            }
140
141            if (pcmParams->nPortIndex > 1) {
142                return OMX_ErrorUndefined;
143            }
144
145            pcmParams->eNumData = OMX_NumericalDataSigned;
146            pcmParams->eEndian = OMX_EndianBig;
147            pcmParams->bInterleaved = OMX_TRUE;
148            pcmParams->nBitPerSample = 16;
149            if (pcmParams->nPortIndex == 0) {
150                // input port
151                pcmParams->ePCMMode = mIsMLaw ? OMX_AUDIO_PCMModeMULaw
152                                              : OMX_AUDIO_PCMModeALaw;
153            } else {
154                // output port
155                pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear;
156            }
157            pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF;
158            pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF;
159
160            pcmParams->nChannels = mNumChannels;
161            pcmParams->nSamplingRate = mSamplingRate;
162
163            return OMX_ErrorNone;
164        }
165
166        default:
167            return SimpleSoftOMXComponent::internalGetParameter(index, params);
168    }
169}
170
171OMX_ERRORTYPE SoftG711::internalSetParameter(
172        OMX_INDEXTYPE index, const OMX_PTR params) {
173    switch (index) {
174        case OMX_IndexParamAudioPcm:
175        {
176            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
177                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;
178
179            if (!isValidOMXParam(pcmParams)) {
180                return OMX_ErrorBadParameter;
181            }
182
183            if (pcmParams->nPortIndex != 0 && pcmParams->nPortIndex != 1) {
184                return OMX_ErrorUndefined;
185            }
186
187            if (pcmParams->nChannels < 1 || pcmParams->nChannels > 2) {
188                return OMX_ErrorUndefined;
189            }
190
191            if(pcmParams->nPortIndex == 0) {
192                mNumChannels = pcmParams->nChannels;
193            }
194
195            mSamplingRate = pcmParams->nSamplingRate;
196
197            return OMX_ErrorNone;
198        }
199
200        case OMX_IndexParamAudioPortFormat:
201        {
202            const OMX_AUDIO_PARAM_PORTFORMATTYPE *formatParams =
203                (const OMX_AUDIO_PARAM_PORTFORMATTYPE *)params;
204
205            if (!isValidOMXParam(formatParams)) {
206                return OMX_ErrorBadParameter;
207            }
208
209            if (formatParams->nPortIndex > 1) {
210                return OMX_ErrorUndefined;
211            }
212
213            if ((formatParams->nPortIndex == 0
214                        && formatParams->eEncoding != OMX_AUDIO_CodingG711)
215                || (formatParams->nPortIndex == 1
216                        && formatParams->eEncoding != OMX_AUDIO_CodingPCM)) {
217                return OMX_ErrorUndefined;
218            }
219
220            return OMX_ErrorNone;
221        }
222
223        case OMX_IndexParamStandardComponentRole:
224        {
225            const OMX_PARAM_COMPONENTROLETYPE *roleParams =
226                (const OMX_PARAM_COMPONENTROLETYPE *)params;
227
228            if (!isValidOMXParam(roleParams)) {
229                return OMX_ErrorBadParameter;
230            }
231
232            if (mIsMLaw) {
233                if (strncmp((const char *)roleParams->cRole,
234                            "audio_decoder.g711mlaw",
235                            OMX_MAX_STRINGNAME_SIZE - 1)) {
236                    return OMX_ErrorUndefined;
237                }
238            } else {
239                if (strncmp((const char *)roleParams->cRole,
240                            "audio_decoder.g711alaw",
241                            OMX_MAX_STRINGNAME_SIZE - 1)) {
242                    return OMX_ErrorUndefined;
243                }
244            }
245
246            return OMX_ErrorNone;
247        }
248
249        default:
250            return SimpleSoftOMXComponent::internalSetParameter(index, params);
251    }
252}
253
254void SoftG711::onQueueFilled(OMX_U32 /* portIndex */) {
255    if (mSignalledError) {
256        return;
257    }
258
259    List<BufferInfo *> &inQueue = getPortQueue(0);
260    List<BufferInfo *> &outQueue = getPortQueue(1);
261
262    while (!inQueue.empty() && !outQueue.empty()) {
263        BufferInfo *inInfo = *inQueue.begin();
264        OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader;
265
266        BufferInfo *outInfo = *outQueue.begin();
267        OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader;
268
269        if ((inHeader->nFlags & OMX_BUFFERFLAG_EOS) && inHeader->nFilledLen == 0) {
270            inQueue.erase(inQueue.begin());
271            inInfo->mOwnedByUs = false;
272            notifyEmptyBufferDone(inHeader);
273
274            outHeader->nFilledLen = 0;
275            outHeader->nFlags = OMX_BUFFERFLAG_EOS;
276
277            outQueue.erase(outQueue.begin());
278            outInfo->mOwnedByUs = false;
279            notifyFillBufferDone(outHeader);
280            return;
281        }
282
283        if (inHeader->nFilledLen > kMaxNumSamplesPerFrame) {
284            ALOGE("input buffer too large (%d).", inHeader->nFilledLen);
285
286            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
287            mSignalledError = true;
288        }
289
290        if (inHeader->nFilledLen * sizeof(int16_t) > outHeader->nAllocLen) {
291            ALOGE("output buffer too small (%d).", outHeader->nAllocLen);
292            android_errorWriteLog(0x534e4554, "27793163");
293
294            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
295            mSignalledError = true;
296            return;
297        }
298
299        const uint8_t *inputptr = inHeader->pBuffer + inHeader->nOffset;
300
301        if (mIsMLaw) {
302            DecodeMLaw(
303                    reinterpret_cast<int16_t *>(outHeader->pBuffer),
304                    inputptr, inHeader->nFilledLen);
305        } else {
306            DecodeALaw(
307                    reinterpret_cast<int16_t *>(outHeader->pBuffer),
308                    inputptr, inHeader->nFilledLen);
309        }
310
311        outHeader->nTimeStamp = inHeader->nTimeStamp;
312        outHeader->nOffset = 0;
313        outHeader->nFilledLen = inHeader->nFilledLen * sizeof(int16_t);
314        outHeader->nFlags = 0;
315
316        if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) {
317            inHeader->nFilledLen = 0;
318        } else {
319            inInfo->mOwnedByUs = false;
320            inQueue.erase(inQueue.begin());
321            inInfo = NULL;
322            notifyEmptyBufferDone(inHeader);
323            inHeader = NULL;
324        }
325
326        outInfo->mOwnedByUs = false;
327        outQueue.erase(outQueue.begin());
328        outInfo = NULL;
329        notifyFillBufferDone(outHeader);
330        outHeader = NULL;
331    }
332}
333
334// static
335void SoftG711::DecodeALaw(
336        int16_t *out, const uint8_t *in, size_t inSize) {
337    while (inSize > 0) {
338        inSize--;
339        int32_t x = *in++;
340
341        int32_t ix = x ^ 0x55;
342        ix &= 0x7f;
343
344        int32_t iexp = ix >> 4;
345        int32_t mant = ix & 0x0f;
346
347        if (iexp > 0) {
348            mant += 16;
349        }
350
351        mant = (mant << 4) + 8;
352
353        if (iexp > 1) {
354            mant = mant << (iexp - 1);
355        }
356
357        *out++ = (x > 127) ? mant : -mant;
358    }
359}
360
361// static
362void SoftG711::DecodeMLaw(
363        int16_t *out, const uint8_t *in, size_t inSize) {
364    while (inSize > 0) {
365        inSize--;
366        int32_t x = *in++;
367
368        int32_t mantissa = ~x;
369        int32_t exponent = (mantissa >> 4) & 7;
370        int32_t segment = exponent + 1;
371        mantissa &= 0x0f;
372
373        int32_t step = 4 << segment;
374
375        int32_t abs = (0x80l << exponent) + step * mantissa + step / 2 - 4 * 33;
376
377        *out++ = (x < 0x80) ? -abs : abs;
378    }
379}
380
381}  // namespace android
382
383android::SoftOMXComponent *createSoftOMXComponent(
384        const char *name, const OMX_CALLBACKTYPE *callbacks,
385        OMX_PTR appData, OMX_COMPONENTTYPE **component) {
386    return new android::SoftG711(name, callbacks, appData, component);
387}
388
389