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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 "wav.h"
extern "C" {
#include <dec_if.h>
}
/* From pvamrwbdecoder_api.h, by dividing by 8 and rounding up */
const int sizes[] = { 17, 23, 32, 36, 40, 46, 50, 58, 60, 5, -1, -1, -1, -1, -1, -1 };
int main(int argc, char *argv[]) {
if (argc < 2) {
fprintf(stderr, "%s in.amr\n", argv[0]);
return 1;
}
FILE* in = fopen(argv[1], "rb");
if (!in) {
perror(argv[1]);
return 1;
}
char header[9];
int n = fread(header, 1, 9, in);
if (n != 9 || memcmp(header, "#!AMR-WB\n", 9)) {
fprintf(stderr, "Bad header\n");
return 1;
}
WavWriter wav("out.wav", 16000, 16, 1);
void* amr = D_IF_init();
while (true) {
uint8_t buffer[500];
/* Read the mode byte */
n = fread(buffer, 1, 1, in);
if (n <= 0)
break;
/* Find the packet size */
int size = sizes[(buffer[0] >> 3) & 0x0f];
if (size <= 0)
break;
n = fread(buffer + 1, 1, size, in);
if (n != size)
break;
/* Decode the packet */
int16_t outbuffer[320];
D_IF_decode(amr, buffer, outbuffer, 0);
/* Convert to little endian and write to wav */
uint8_t littleendian[640];
uint8_t* ptr = littleendian;
for (int i = 0; i < 320; i++) {
*ptr++ = (outbuffer[i] >> 0) & 0xff;
*ptr++ = (outbuffer[i] >> 8) & 0xff;
}
wav.writeData(littleendian, 640);
}
fclose(in);
D_IF_exit(amr);
return 0;
}
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