xref: /frameworks/av/media/libstagefright/codecs/gsm/dec/SoftGSM.cpp

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

//#define LOG_NDEBUG 0
#define LOG_TAG "SoftGSM"
#include <utils/Log.h>

#include "SoftGSM.h"

#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/MediaDefs.h>

namespace android {

template<class T>
static void InitOMXParams(T *params) {
    params->nSize = sizeof(T);
    params->nVersion.s.nVersionMajor = 1;
    params->nVersion.s.nVersionMinor = 0;
    params->nVersion.s.nRevision = 0;
    params->nVersion.s.nStep = 0;
}

SoftGSM::SoftGSM(
        const char *name,
        const OMX_CALLBACKTYPE *callbacks,
        OMX_PTR appData,
        OMX_COMPONENTTYPE **component)
    : SimpleSoftOMXComponent(name, callbacks, appData, component),
      mSignalledError(false) {

    CHECK(!strcmp(name, "OMX.google.gsm.decoder"));

    mGsm = gsm_create();
    CHECK(mGsm);
    int msopt = 1;
    gsm_option(mGsm, GSM_OPT_WAV49, &msopt);

    initPorts();
}

SoftGSM::~SoftGSM() {
    gsm_destroy(mGsm);
}

void SoftGSM::initPorts() {
    OMX_PARAM_PORTDEFINITIONTYPE def;
    InitOMXParams(&def);

    def.nPortIndex = 0;
    def.eDir = OMX_DirInput;
    def.nBufferCountMin = kNumBuffers;
    def.nBufferCountActual = def.nBufferCountMin;
    def.nBufferSize = sizeof(gsm_frame);
    def.bEnabled = OMX_TRUE;
    def.bPopulated = OMX_FALSE;
    def.eDomain = OMX_PortDomainAudio;
    def.bBuffersContiguous = OMX_FALSE;
    def.nBufferAlignment = 1;

    def.format.audio.cMIMEType =
        const_cast<char *>(MEDIA_MIMETYPE_AUDIO_MSGSM);

    def.format.audio.pNativeRender = NULL;
    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
    def.format.audio.eEncoding = OMX_AUDIO_CodingGSMFR;

    addPort(def);

    def.nPortIndex = 1;
    def.eDir = OMX_DirOutput;
    def.nBufferCountMin = kNumBuffers;
    def.nBufferCountActual = def.nBufferCountMin;
    def.nBufferSize = kMaxNumSamplesPerFrame * sizeof(int16_t);
    def.bEnabled = OMX_TRUE;
    def.bPopulated = OMX_FALSE;
    def.eDomain = OMX_PortDomainAudio;
    def.bBuffersContiguous = OMX_FALSE;
    def.nBufferAlignment = 2;

    def.format.audio.cMIMEType = const_cast<char *>("audio/raw");
    def.format.audio.pNativeRender = NULL;
    def.format.audio.bFlagErrorConcealment = OMX_FALSE;
    def.format.audio.eEncoding = OMX_AUDIO_CodingPCM;

    addPort(def);
}

OMX_ERRORTYPE SoftGSM::internalGetParameter(
        OMX_INDEXTYPE index, OMX_PTR params) {
    switch (index) {
        case OMX_IndexParamAudioPcm:
        {
            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;

            if (pcmParams->nPortIndex > 1) {
                return OMX_ErrorUndefined;
            }

            pcmParams->eNumData = OMX_NumericalDataSigned;
            pcmParams->eEndian = OMX_EndianBig;
            pcmParams->bInterleaved = OMX_TRUE;
            pcmParams->nBitPerSample = 16;
            pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear;
            pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF;
            pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF;

            pcmParams->nChannels = 1;
            pcmParams->nSamplingRate = 8000;

            return OMX_ErrorNone;
        }

        default:
            return SimpleSoftOMXComponent::internalGetParameter(index, params);
    }
}

OMX_ERRORTYPE SoftGSM::internalSetParameter(
        OMX_INDEXTYPE index, const OMX_PTR params) {
    switch (index) {
        case OMX_IndexParamAudioPcm:
        {
            OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
                (OMX_AUDIO_PARAM_PCMMODETYPE *)params;

            if (pcmParams->nPortIndex != 0 && pcmParams->nPortIndex != 1) {
                return OMX_ErrorUndefined;
            }

            if (pcmParams->nChannels != 1) {
                return OMX_ErrorUndefined;
            }

            if (pcmParams->nSamplingRate != 8000) {
                return OMX_ErrorUndefined;
            }

            return OMX_ErrorNone;
        }

        case OMX_IndexParamStandardComponentRole:
        {
            const OMX_PARAM_COMPONENTROLETYPE *roleParams =
                (const OMX_PARAM_COMPONENTROLETYPE *)params;

            if (strncmp((const char *)roleParams->cRole,
                        "audio_decoder.gsm",
                        OMX_MAX_STRINGNAME_SIZE - 1)) {
                return OMX_ErrorUndefined;
            }

            return OMX_ErrorNone;
        }

        default:
            return SimpleSoftOMXComponent::internalSetParameter(index, params);
    }
}

void SoftGSM::onQueueFilled(OMX_U32 /* portIndex */) {
    if (mSignalledError) {
        return;
    }

    List<BufferInfo *> &inQueue = getPortQueue(0);
    List<BufferInfo *> &outQueue = getPortQueue(1);

    while (!inQueue.empty() && !outQueue.empty()) {
        BufferInfo *inInfo = *inQueue.begin();
        OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader;

        BufferInfo *outInfo = *outQueue.begin();
        OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader;

        if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) {
            inQueue.erase(inQueue.begin());
            inInfo->mOwnedByUs = false;
            notifyEmptyBufferDone(inHeader);

            outHeader->nFilledLen = 0;
            outHeader->nFlags = OMX_BUFFERFLAG_EOS;

            outQueue.erase(outQueue.begin());
            outInfo->mOwnedByUs = false;
            notifyFillBufferDone(outHeader);
            return;
        }

        if (inHeader->nFilledLen > kMaxNumSamplesPerFrame) {
            ALOGE("input buffer too large (%d).", inHeader->nFilledLen);
            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
            mSignalledError = true;
        }

        if(((inHeader->nFilledLen / 65) * 65) != inHeader->nFilledLen) {
            ALOGE("input buffer not multiple of 65 (%d).", inHeader->nFilledLen);
            notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
            mSignalledError = true;
        }

        uint8_t *inputptr = inHeader->pBuffer + inHeader->nOffset;

        int n = mSignalledError ? 0 : DecodeGSM(mGsm,
                  reinterpret_cast<int16_t *>(outHeader->pBuffer), inputptr, inHeader->nFilledLen);

        outHeader->nTimeStamp = inHeader->nTimeStamp;
        outHeader->nOffset = 0;
        outHeader->nFilledLen = n * sizeof(int16_t);
        outHeader->nFlags = 0;

        inInfo->mOwnedByUs = false;
        inQueue.erase(inQueue.begin());
        inInfo = NULL;
        notifyEmptyBufferDone(inHeader);
        inHeader = NULL;

        outInfo->mOwnedByUs = false;
        outQueue.erase(outQueue.begin());
        outInfo = NULL;
        notifyFillBufferDone(outHeader);
        outHeader = NULL;
    }
}


// static
int SoftGSM::DecodeGSM(gsm handle,
        int16_t *out, uint8_t *in, size_t inSize) {

    int ret = 0;
    while (inSize > 0) {
        gsm_decode(handle, in, out);
        in += 33;
        inSize -= 33;
        out += 160;
        ret += 160;
        gsm_decode(handle, in, out);
        in += 32;
        inSize -= 32;
        out += 160;
        ret += 160;
    }
    return ret;
}


}  // namespace android

android::SoftOMXComponent *createSoftOMXComponent(
        const char *name, const OMX_CALLBACKTYPE *callbacks,
        OMX_PTR appData, OMX_COMPONENTTYPE **component) {
    return new android::SoftGSM(name, callbacks, appData, component);
}