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 <stdlib.h>
30#include <stdio.h>
31#include <assert.h>
32#include <string.h>
33
34#include "pvmp3decoder_api.h"
35#include "mp3reader.h"
36#include <audio_utils/sndfile.h>
37
38using namespace std;
39
40enum {
41    kInputBufferSize = 10 * 1024,
42    kOutputBufferSize = 4608 * 2,
43};
44
45int main(int argc, const char **argv) {
46
47    if (argc != 3) {
48        fprintf(stderr, "Usage %s <input file> <output file>\n", argv[0]);
49        return EXIT_FAILURE;
50    }
51
52    // Initialize the config.
53    tPVMP3DecoderExternal config;
54    config.equalizerType = flat;
55    config.crcEnabled = false;
56
57    // Allocate the decoder memory.
58    uint32_t memRequirements = pvmp3_decoderMemRequirements();
59    void *decoderBuf = malloc(memRequirements);
60    assert(decoderBuf != NULL);
61
62    // Initialize the decoder.
63    pvmp3_InitDecoder(&config, decoderBuf);
64
65    // Open the input file.
66    Mp3Reader mp3Reader;
67    bool success = mp3Reader.init(argv[1]);
68    if (!success) {
69        fprintf(stderr, "Encountered error reading %s\n", argv[1]);
70        free(decoderBuf);
71        return EXIT_FAILURE;
72    }
73
74    // Open the output file.
75    SF_INFO sfInfo;
76    memset(&sfInfo, 0, sizeof(SF_INFO));
77    sfInfo.channels = mp3Reader.getNumChannels();
78    sfInfo.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
79    sfInfo.samplerate = mp3Reader.getSampleRate();
80    SNDFILE *handle = sf_open(argv[2], SFM_WRITE, &sfInfo);
81    if (handle == NULL) {
82        fprintf(stderr, "Encountered error writing %s\n", argv[2]);
83        mp3Reader.close();
84        free(decoderBuf);
85        return EXIT_FAILURE;
86    }
87
88    // Allocate input buffer.
89    uint8_t *inputBuf = static_cast<uint8_t*>(malloc(kInputBufferSize));
90    assert(inputBuf != NULL);
91
92    // Allocate output buffer.
93    int16_t *outputBuf = static_cast<int16_t*>(malloc(kOutputBufferSize));
94    assert(outputBuf != NULL);
95
96    // Decode loop.
97    int retVal = EXIT_SUCCESS;
98    while (1) {
99        // Read input from the file.
100        uint32_t bytesRead;
101        bool success = mp3Reader.getFrame(inputBuf, &bytesRead);
102        if (!success) break;
103
104        // Set the input config.
105        config.inputBufferCurrentLength = bytesRead;
106        config.inputBufferMaxLength = 0;
107        config.inputBufferUsedLength = 0;
108        config.pInputBuffer = inputBuf;
109        config.pOutputBuffer = outputBuf;
110        config.outputFrameSize = kOutputBufferSize / sizeof(int16_t);
111
112        ERROR_CODE decoderErr;
113        decoderErr = pvmp3_framedecoder(&config, decoderBuf);
114        if (decoderErr != NO_DECODING_ERROR) {
115            fprintf(stderr, "Decoder encountered error\n");
116            retVal = EXIT_FAILURE;
117            break;
118        }
119        sf_writef_short(handle, outputBuf,
120                        config.outputFrameSize / sfInfo.channels);
121    }
122
123    // Close input reader and output writer.
124    mp3Reader.close();
125    sf_close(handle);
126
127    // Free allocated memory.
128    free(inputBuf);
129    free(outputBuf);
130    free(decoderBuf);
131
132    return retVal;
133}
134