You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
3.4 KiB
109 lines
3.4 KiB
/***************************************************************************
|
|
copyright : (C) 2006 by Martin Aumueller
|
|
email : aumuell@reserv.at
|
|
|
|
copyright : (C) 2005 by Andy Leadbetter
|
|
email : andrew.leadbetter@gmail.com
|
|
(original mp4 implementation)
|
|
***************************************************************************/
|
|
|
|
/***************************************************************************
|
|
* This library is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU Lesser General Public License version *
|
|
* 2.1 as published by the Free Software Foundation. *
|
|
* *
|
|
* This library 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 *
|
|
* Lesser General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU Lesser General Public *
|
|
* License along with this library; if not, write to the Free Software *
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, *
|
|
* MA 02110-1301 USA *
|
|
***************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "wavproperties.h"
|
|
|
|
#include <taglib/tstring.h>
|
|
|
|
#include "wavfile.h"
|
|
|
|
#include <netinet/in.h> // ntohl
|
|
|
|
using namespace TagLib;
|
|
|
|
struct WavHeader
|
|
{
|
|
uint32_t riff_id;
|
|
uint32_t riff_size;
|
|
uint32_t wave_id;
|
|
uint32_t format_id;
|
|
uint32_t format_size;
|
|
uint16_t format_tag;
|
|
uint16_t num_channels;
|
|
uint32_t num_samples_per_sec;
|
|
uint32_t num_avg_bytes_per_sec;
|
|
uint16_t num_block_align;
|
|
uint16_t bits_per_sample;
|
|
uint32_t data_id;
|
|
uint32_t num_data_bytes;
|
|
};
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// public members
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Wav::Properties::Properties(Properties::ReadStyle style) : AudioProperties(style)
|
|
{
|
|
m_length = 0;
|
|
m_bitrate = 0;
|
|
m_sampleRate = 0;
|
|
m_channels = 0;
|
|
}
|
|
|
|
Wav::Properties::~Properties()
|
|
{
|
|
}
|
|
|
|
int Wav::Properties::length() const
|
|
{
|
|
return m_length;
|
|
}
|
|
|
|
int Wav::Properties::bitrate() const
|
|
{
|
|
return m_bitrate;
|
|
}
|
|
|
|
int Wav::Properties::sampleRate() const
|
|
{
|
|
return m_sampleRate;
|
|
}
|
|
|
|
int Wav::Properties::channels() const
|
|
{
|
|
return m_channels;
|
|
}
|
|
|
|
#define swap16(x) ((((x)&0xff00)>>8) | (((x)&0x00ff)<<8))
|
|
#define swap32(x) ((swap16((x)&0x0000ffff)<<16) | swap16(((x)&0xffff0000)>>16))
|
|
|
|
void Wav::Properties::readWavProperties( FILE *fp )
|
|
{
|
|
fseek(fp, 0, SEEK_SET );
|
|
WavHeader header;
|
|
if( fread(&header, sizeof(header), 1, fp) != 1 )
|
|
{
|
|
return;
|
|
}
|
|
|
|
m_channels = ntohs(swap16(header.num_channels));
|
|
m_sampleRate = ntohl(swap32(header.num_samples_per_sec));
|
|
m_bitrate = ntohl(swap32(header.num_avg_bytes_per_sec)) * 8 / 1000;
|
|
m_length = ntohl(swap32(header.num_data_bytes))/ntohl(swap32(header.num_avg_bytes_per_sec));
|
|
}
|