Add test for AMR-NB decoder

LOCAL_MODULE_TAGS := optional

include $(BUILD_SHARED_LIBRARY)

################################################################################

include $(CLEAR_VARS)

LOCAL_SRC_FILES := \

        test/amrnbdec_test.cpp

LOCAL_C_INCLUDES := \

        $(LOCAL_PATH)/src \

        $(LOCAL_PATH)/../common/include \

        $(call include-path-for, audio-utils)

LOCAL_STATIC_LIBRARIES := \

        libstagefright_amrnbdec libsndfile

LOCAL_SHARED_LIBRARIES := \

        libstagefright_amrnb_common libaudioutils

LOCAL_MODULE := libstagefright_amrnbdec_test

LOCAL_MODULE_TAGS := optional

include $(BUILD_EXECUTABLE)

/*

 * Copyright (C) 2014 The Android Open Source Project

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *  * Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *  * Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include <stdio.h>

#include <stdint.h>

#include <string.h>

#include <assert.h>

#include "gsmamr_dec.h"

#include <audio_utils/sndfile.h>

// Constants for AMR-NB

enum {

    kInputBufferSize = 64,

    kSamplesPerFrame = 160,

    kBitsPerSample = 16,

    kOutputBufferSize = kSamplesPerFrame * kBitsPerSample/8,

    kSampleRate = 8000,

    kChannels = 1,

    kFileHeaderSize = 6

};

const uint32_t kFrameSizes[] = {12, 13, 15, 17, 19, 20, 26, 31};

int main(int argc, char *argv[]) {

    if(argc != 3) {

        fprintf(stderr, "Usage %s <input file> <output file>\n", argv[0]);

        return 1;

    }

    // Open the input file

    FILE* fpInput = fopen(argv[1], "rb");

    if (!fpInput) {

        fprintf(stderr, "Could not open %s\n", argv[1]);

        return 1;

    }

    // Validate the input AMR file

    char header[kFileHeaderSize];

    int bytesRead = fread(header, 1, kFileHeaderSize, fpInput);

    if (bytesRead != kFileHeaderSize || memcmp(header, "#!AMR\n", kFileHeaderSize)) {

        fprintf(stderr, "Invalid AMR-NB file\n");

        return 1;

    }

    // Open the output file

    SF_INFO sfInfo;

    memset(&sfInfo, 0, sizeof(SF_INFO));

    sfInfo.channels = kChannels;

    sfInfo.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;

    sfInfo.samplerate = kSampleRate;

    SNDFILE *handle = sf_open(argv[2], SFM_WRITE, &sfInfo);

    if(!handle){

        fprintf(stderr, "Could not create %s\n", argv[2]);

        return 1;

    }

    // Create AMR-NB decoder instance

    void* amrHandle;

    int err = GSMInitDecode(&amrHandle, (Word8*)"AMRNBDecoder");

    if(err != 0){

        fprintf(stderr, "Error creating AMR-NB decoder instance\n");

        return 1;

    }

    //Allocate input buffer

    void *inputBuf = malloc(kInputBufferSize);

    assert(inputBuf != NULL);

    //Allocate output buffer

    void *outputBuf = malloc(kOutputBufferSize);

    assert(outputBuf != NULL);

    // Decode loop

    uint32_t retVal = 0;

    while (1) {

        // Read mode

        uint8_t mode;

        bytesRead = fread(&mode, 1, 1, fpInput);

        if (bytesRead != 1) break;

        // Find frame type

        Frame_Type_3GPP frameType = (Frame_Type_3GPP)((mode >> 3) & 0x0f);

        if (frameType >= AMR_SID){

            fprintf(stderr, "Frame type %d not supported\n",frameType);

            retVal = 1;

            break;

        }

        // Find frame type

        int32_t frameSize = kFrameSizes[frameType];

        bytesRead = fread(inputBuf, 1, frameSize, fpInput);

        if (bytesRead != frameSize) break;

        //Decode frame

        int32_t decodeStatus;

        decodeStatus = AMRDecode(amrHandle, frameType, (uint8_t*)inputBuf,

                                 (int16_t*)outputBuf, MIME_IETF);

        if(decodeStatus == -1) {

            fprintf(stderr, "Decoder encountered error\n");

            retVal = 1;

            break;

        }

        //Write output to wav

        sf_writef_short(handle, (int16_t*)outputBuf, kSamplesPerFrame);

    }

    // Close input and output file

    fclose(fpInput);

    sf_close(handle);

    //Free allocated memory

    free(inputBuf);

    free(outputBuf);

    // Close decoder instance

    GSMDecodeFrameExit(&amrHandle);

    return retVal;

}