SoftGSM.cpp revision d211045926b78d2bc82611c97a7cfd18a9790c4b 
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_NDEBUG 0
18#define LOG_TAG "SoftGSM"
19#include <utils/Log.h>
20
21#include "SoftGSM.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
37// Microsoft WAV GSM encoding packs two GSM frames into 65 bytes.
38static const int kMSGSMFrameSize = 65;
39
40SoftGSM::SoftGSM(
41        const char *name,
42        const OMX_CALLBACKTYPE *callbacks,
43        OMX_PTR appData,
44        OMX_COMPONENTTYPE **component)
45    : SimpleSoftOMXComponent(name, callbacks, appData, component),
46      mSignalledError(false) {
47
48    CHECK(!strcmp(name, "OMX.google.gsm.decoder"));
49
50    mGsm = gsm_create();
51    CHECK(mGsm);
52    int msopt = 1;
53    gsm_option(mGsm, GSM_OPT_WAV49, &msopt);
54
55    initPorts();
56}
57
58SoftGSM::~SoftGSM() {
59    gsm_destroy(mGsm);
60}
61
62void SoftGSM::initPorts() {
63    OMX_PARAM_PORTDEFINITIONTYPE def;
64    InitOMXParams(&def);
65
66    def.nPortIndex = 0;
67    def.eDir = OMX_DirInput;
68    def.nBufferCountMin = kNumBuffers;
69    def.nBufferCountActual = def.nBufferCountMin;
70    def.nBufferSize = 1024 / kMSGSMFrameSize * kMSGSMFrameSize;
71    def.bEnabled = OMX_TRUE;
72    def.bPopulated = OMX_FALSE;
73    def.eDomain = OMX_PortDomainAudio;
74    def.bBuffersContiguous = OMX_FALSE;
75    def.nBufferAlignment = 1;
76
77    def.format.audio.cMIMEType =
78        const_cast<char *>(MEDIA_MIMETYPE_AUDIO_MSGSM);
79
80    def.format.audio.pNativeRender = NULL;
81    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
82    def.format.audio.eEncoding = OMX_AUDIO_CodingGSMFR;
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 SoftGSM::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            pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear;
126            pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF;
127            pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF;
128
129            pcmParams->nChannels = 1;
130            pcmParams->nSamplingRate = 8000;
131
132            return OMX_ErrorNone;
133        }
134
135        default:
136            return SimpleSoftOMXComponent::internalGetParameter(index, params);
137    }
138}
139
140OMX_ERRORTYPE SoftGSM::internalSetParameter(
141        OMX_INDEXTYPE index, const OMX_PTR params) {
142    switch (index) {
143        case OMX_IndexParamAudioPcm:
144        {
145            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
146                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;
147
148            if (!isValidOMXParam(pcmParams)) {
149                return OMX_ErrorBadParameter;
150            }
151
152            if (pcmParams->nPortIndex != 0 && pcmParams->nPortIndex != 1) {
153                return OMX_ErrorUndefined;
154            }
155
156            if (pcmParams->nChannels != 1) {
157                return OMX_ErrorUndefined;
158            }
159
160            if (pcmParams->nSamplingRate != 8000) {
161                return OMX_ErrorUndefined;
162            }
163
164            return OMX_ErrorNone;
165        }
166
167        case OMX_IndexParamStandardComponentRole:
168        {
169            const OMX_PARAM_COMPONENTROLETYPE *roleParams =
170                (const OMX_PARAM_COMPONENTROLETYPE *)params;
171
172            if (!isValidOMXParam(roleParams)) {
173                return OMX_ErrorBadParameter;
174            }
175
176            if (strncmp((const char *)roleParams->cRole,
177                        "audio_decoder.gsm",
178                        OMX_MAX_STRINGNAME_SIZE - 1)) {
179                return OMX_ErrorUndefined;
180            }
181
182            return OMX_ErrorNone;
183        }
184
185        default:
186            return SimpleSoftOMXComponent::internalSetParameter(index, params);
187    }
188}
189
190void SoftGSM::onQueueFilled(OMX_U32 /* portIndex */) {
191    if (mSignalledError) {
192        return;
193    }
194
195    List<BufferInfo *> &inQueue = getPortQueue(0);
196    List<BufferInfo *> &outQueue = getPortQueue(1);
197
198    while (!inQueue.empty() && !outQueue.empty()) {
199        BufferInfo *inInfo = *inQueue.begin();
200        OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader;
201
202        BufferInfo *outInfo = *outQueue.begin();
203        OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader;
204
205        if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) {
206            inQueue.erase(inQueue.begin());
207            inInfo->mOwnedByUs = false;
208            notifyEmptyBufferDone(inHeader);
209
210            outHeader->nFilledLen = 0;
211            outHeader->nFlags = OMX_BUFFERFLAG_EOS;
212
213            outQueue.erase(outQueue.begin());
214            outInfo->mOwnedByUs = false;
215            notifyFillBufferDone(outHeader);
216            return;
217        }
218
219        if (inHeader->nFilledLen > kMaxNumSamplesPerFrame) {
220            ALOGE("input buffer too large (%d).", inHeader->nFilledLen);
221            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
222            mSignalledError = true;
223        }
224
225        if(((inHeader->nFilledLen / kMSGSMFrameSize) * kMSGSMFrameSize) != inHeader->nFilledLen) {
226            ALOGE("input buffer not multiple of %d (%d).", kMSGSMFrameSize, inHeader->nFilledLen);
227            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
228            mSignalledError = true;
229        }
230
231        if (outHeader->nAllocLen < (inHeader->nFilledLen / kMSGSMFrameSize) * 320) {
232            ALOGE("output buffer is not large enough (%d).", outHeader->nAllocLen);
233            android_errorWriteLog(0x534e4554, "27793367");
234            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
235            mSignalledError = true;
236            return;
237        }
238
239        uint8_t *inputptr = inHeader->pBuffer + inHeader->nOffset;
240
241        int n = mSignalledError ? 0 : DecodeGSM(mGsm,
242                  reinterpret_cast<int16_t *>(outHeader->pBuffer), inputptr, inHeader->nFilledLen);
243
244        outHeader->nTimeStamp = inHeader->nTimeStamp;
245        outHeader->nOffset = 0;
246        outHeader->nFilledLen = n * sizeof(int16_t);
247        outHeader->nFlags = 0;
248
249        inInfo->mOwnedByUs = false;
250        inQueue.erase(inQueue.begin());
251        inInfo = NULL;
252        notifyEmptyBufferDone(inHeader);
253        inHeader = NULL;
254
255        outInfo->mOwnedByUs = false;
256        outQueue.erase(outQueue.begin());
257        outInfo = NULL;
258        notifyFillBufferDone(outHeader);
259        outHeader = NULL;
260    }
261}
262
263
264// static
265int SoftGSM::DecodeGSM(gsm handle,
266        int16_t *out, uint8_t *in, size_t inSize) {
267
268    int ret = 0;
269    while (inSize > 0) {
270        gsm_decode(handle, in, out);
271        in += 33;
272        inSize -= 33;
273        out += 160;
274        ret += 160;
275        gsm_decode(handle, in, out);
276        in += 32;
277        inSize -= 32;
278        out += 160;
279        ret += 160;
280    }
281    return ret;
282}
283
284void SoftGSM::onPortFlushCompleted(OMX_U32 portIndex) {
285    if (portIndex == 0) {
286        gsm_destroy(mGsm);
287        mGsm = gsm_create();
288        int msopt = 1;
289        gsm_option(mGsm, GSM_OPT_WAV49, &msopt);
290    }
291}
292
293void SoftGSM::onReset() {
294    gsm_destroy(mGsm);
295    mGsm = gsm_create();
296    int msopt = 1;
297    gsm_option(mGsm, GSM_OPT_WAV49, &msopt);
298    mSignalledError = false;
299}
300
301
302
303
304}  // namespace android
305
306android::SoftOMXComponent *createSoftOMXComponent(
307        const char *name, const OMX_CALLBACKTYPE *callbacks,
308        OMX_PTR appData, OMX_COMPONENTTYPE **component) {
309    return new android::SoftGSM(name, callbacks, appData, component);
310}
311
312