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/**
* Copyright (C) 2008-2009 Felipe Contreras
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* This file was originally written by Youness Alaoui <kakaroto@kakaroto.homelinux.net>
* in order to create a simple test program for libsiren. The original file is
* available at:
* https://amsn.svn.sourceforge.net/svnroot/amsn/trunk/amsn/utils/tcl_siren/src/siren_test.c
*/
#include <stdio.h>
#include "pn_siren7.h"
#include "ext/libsiren/siren7.h"
#define RIFF_ID 0x46464952
#define WAVE_ID 0x45564157
#define FMT_ID 0x20746d66
#define DATA_ID 0x61746164
#define FACT_ID 0x74636166
typedef struct
{
unsigned int chunk_id;
unsigned int chunk_size;
} wav_data;
typedef struct
{
unsigned int chunk_id;
unsigned int chunk_size;
unsigned int type_id;
} riff_data;
typedef struct
{
unsigned short format;
unsigned short channels;
unsigned int sample_rate;
unsigned int byte_rate;
unsigned short block_align;
unsigned short bits_per_sample;
} fmt_chunk;
typedef struct
{
fmt_chunk fmt;
unsigned short extra_size;
unsigned char *extra_content;
} fmt_chunk_ex;
#define IDX(val, i) ((unsigned int) ((unsigned char *) &val)[i])
#define GUINT16_FROM_LE(val) ((unsigned short) (IDX (val, 0) + (unsigned short) IDX (val, 1) * 256))
#define GUINT32_FROM_LE(val) ((unsigned int) (IDX (val, 0) + IDX (val, 1) * 256 + \
IDX (val, 2) * 65536 + IDX (val, 3) * 16777216))
void
pn_siren7_decode_file (const char *input_file, const char *output_file)
{
FILE * input;
FILE * output;
riff_data riff_header;
wav_data current_chunk;
fmt_chunk_ex fmt_info;
unsigned char *out_data = NULL;
unsigned char *out_ptr = NULL;
unsigned char in_buffer[40];
unsigned int file_offset;
unsigned int chunk_offset;
SirenDecoder decoder = Siren7_NewDecoder (16000);
input = fopen (input_file, "rb");
output = fopen (output_file, "wb");
file_offset = 0;
fread (&riff_header, sizeof (riff_data), 1, input);
file_offset += sizeof (riff_data);
riff_header.chunk_id = GUINT32_FROM_LE (riff_header.chunk_id);
riff_header.chunk_size = GUINT32_FROM_LE (riff_header.chunk_size);
riff_header.type_id = GUINT32_FROM_LE (riff_header.type_id);
if (riff_header.chunk_id == RIFF_ID && riff_header.type_id == WAVE_ID)
{
while (file_offset < riff_header.chunk_size)
{
fread (¤t_chunk, sizeof (wav_data), 1, input);
file_offset += sizeof (wav_data);
current_chunk.chunk_id = GUINT32_FROM_LE (current_chunk.chunk_id);
current_chunk.chunk_size = GUINT32_FROM_LE (current_chunk.chunk_size);
chunk_offset = 0;
if (current_chunk.chunk_id == FMT_ID)
{
fread (&fmt_info, sizeof (fmt_chunk), 1, input);
/* Should convert from LE the fmt_info structure, but it's not necessary... */
if (current_chunk.chunk_size > sizeof (fmt_chunk))
{
fread (&(fmt_info.extra_size), sizeof (short), 1, input);
fmt_info.extra_size = GUINT32_FROM_LE (fmt_info.extra_size);
fmt_info.extra_content = (unsigned char *) malloc (fmt_info.extra_size);
fread (fmt_info.extra_content, fmt_info.extra_size, 1, input);
}
else
{
fmt_info.extra_size = 0;
fmt_info.extra_content = NULL;
}
}
else if (current_chunk.chunk_id == DATA_ID)
{
out_data = (unsigned char *) malloc (current_chunk.chunk_size * 16);
out_ptr = out_data;
while (chunk_offset + 40 <= current_chunk.chunk_size)
{
fread (in_buffer, 1, 40, input);
Siren7_DecodeFrame (decoder, in_buffer, out_ptr);
out_ptr += 640;
chunk_offset += 40;
}
fread (in_buffer, 1, current_chunk.chunk_size - chunk_offset, input);
}
else
{
fseek (input, current_chunk.chunk_size, SEEK_CUR);
}
file_offset += current_chunk.chunk_size;
}
}
/* The WAV heder should be converted TO LE, but should be done inside the library and it's not important for now ... */
fwrite (&(decoder->WavHeader), sizeof (decoder->WavHeader), 1, output);
fwrite (out_data, 1, GUINT32_FROM_LE (decoder->WavHeader.DataSize), output);
fclose (output);
Siren7_CloseDecoder (decoder);
free (out_data);
free (fmt_info.extra_content);
}
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