amrnbdec_test.cpp revision f9fa4bfda4122b3823a5a5cc875334bf60949a18 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <stdio.h>
30#include <stdint.h>
31#include <string.h>
32#include <assert.h>
33
34#include "gsmamr_dec.h"
35#include <audio_utils/sndfile.h>
36
37// Constants for AMR-NB
38enum {
39    kInputBufferSize = 64,
40    kSamplesPerFrame = 160,
41    kBitsPerSample = 16,
42    kOutputBufferSize = kSamplesPerFrame * kBitsPerSample/8,
43    kSampleRate = 8000,
44    kChannels = 1,
45    kFileHeaderSize = 6
46};
47const uint32_t kFrameSizes[] = {12, 13, 15, 17, 19, 20, 26, 31};
48
49
50int main(int argc, char *argv[]) {
51
52    if(argc != 3) {
53        fprintf(stderr, "Usage %s <input file> <output file>\n", argv[0]);
54        return 1;
55    }
56
57    // Open the input file
58    FILE* fpInput = fopen(argv[1], "rb");
59    if (!fpInput) {
60        fprintf(stderr, "Could not open %s\n", argv[1]);
61        return 1;
62    }
63
64    // Validate the input AMR file
65    char header[kFileHeaderSize];
66    int bytesRead = fread(header, 1, kFileHeaderSize, fpInput);
67    if (bytesRead != kFileHeaderSize || memcmp(header, "#!AMR\n", kFileHeaderSize)) {
68        fprintf(stderr, "Invalid AMR-NB file\n");
69        return 1;
70    }
71
72    // Open the output file
73    SF_INFO sfInfo;
74    memset(&sfInfo, 0, sizeof(SF_INFO));
75    sfInfo.channels = kChannels;
76    sfInfo.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
77    sfInfo.samplerate = kSampleRate;
78    SNDFILE *handle = sf_open(argv[2], SFM_WRITE, &sfInfo);
79    if(!handle){
80        fprintf(stderr, "Could not create %s\n", argv[2]);
81        return 1;
82    }
83
84    // Create AMR-NB decoder instance
85    void* amrHandle;
86    int err = GSMInitDecode(&amrHandle, (Word8*)"AMRNBDecoder");
87    if(err != 0){
88        fprintf(stderr, "Error creating AMR-NB decoder instance\n");
89        return 1;
90    }
91
92    //Allocate input buffer
93    void *inputBuf = malloc(kInputBufferSize);
94    assert(inputBuf != NULL);
95
96    //Allocate output buffer
97    void *outputBuf = malloc(kOutputBufferSize);
98    assert(outputBuf != NULL);
99
100
101    // Decode loop
102    uint32_t retVal = 0;
103    while (1) {
104        // Read mode
105        uint8_t mode;
106        bytesRead = fread(&mode, 1, 1, fpInput);
107        if (bytesRead != 1) break;
108
109        // Find frame type
110        Frame_Type_3GPP frameType = (Frame_Type_3GPP)((mode >> 3) & 0x0f);
111        if (frameType >= AMR_SID){
112            fprintf(stderr, "Frame type %d not supported\n",frameType);
113            retVal = 1;
114            break;
115        }
116
117        // Find frame type
118        int32_t frameSize = kFrameSizes[frameType];
119        bytesRead = fread(inputBuf, 1, frameSize, fpInput);
120        if (bytesRead != frameSize) break;
121
122        //Decode frame
123        int32_t decodeStatus;
124        decodeStatus = AMRDecode(amrHandle, frameType, (uint8_t*)inputBuf,
125                                 (int16_t*)outputBuf, MIME_IETF);
126        if(decodeStatus == -1) {
127            fprintf(stderr, "Decoder encountered error\n");
128            retVal = 1;
129            break;
130        }
131
132        //Write output to wav
133        sf_writef_short(handle, (int16_t*)outputBuf, kSamplesPerFrame);
134
135    }
136
137    // Close input and output file
138    fclose(fpInput);
139    sf_close(handle);
140
141    //Free allocated memory
142    free(inputBuf);
143    free(outputBuf);
144
145    // Close decoder instance
146    GSMDecodeFrameExit(&amrHandle);
147
148    return retVal;
149}
150