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/* ------------------------------------------------------------------
* Copyright (C) 2009 Martin Storsjo
*
* 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.
* -------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "wavwriter.h"
#include <interf_dec.h>
/* From WmfDecBytesPerFrame in dec_input_format_tab.cpp */
const int sizes[] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 6, 5, 5, 0, 0, 0, 0 };
int main(int argc, char *argv[]) {
FILE* in;
char header[6];
int n;
void *wav, *amr;
if (argc < 3) {
fprintf(stderr, "%s in.amr out.wav\n", argv[0]);
return 1;
}
in = fopen(argv[1], "rb");
if (!in) {
perror(argv[1]);
return 1;
}
n = fread(header, 1, 6, in);
if (n != 6 || memcmp(header, "#!AMR\n", 6)) {
fprintf(stderr, "Bad header\n");
return 1;
}
wav = wav_write_open(argv[2], 8000, 16, 1);
if (!wav) {
fprintf(stderr, "Unable to open %s\n", argv[2]);
return 1;
}
amr = Decoder_Interface_init();
while (1) {
uint8_t buffer[500], littleendian[320], *ptr;
int size, i;
int16_t outbuffer[160];
/* Read the mode byte */
n = fread(buffer, 1, 1, in);
if (n <= 0)
break;
/* Find the packet size */
size = sizes[(buffer[0] >> 3) & 0x0f];
n = fread(buffer + 1, 1, size, in);
if (n != size)
break;
/* Decode the packet */
Decoder_Interface_Decode(amr, buffer, outbuffer, 0);
/* Convert to little endian and write to wav */
ptr = littleendian;
for (i = 0; i < 160; i++) {
*ptr++ = (outbuffer[i] >> 0) & 0xff;
*ptr++ = (outbuffer[i] >> 8) & 0xff;
}
wav_write_data(wav, littleendian, 320);
}
fclose(in);
Decoder_Interface_exit(amr);
wav_write_close(wav);
return 0;
}
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