wxWidgets/utils/wxMMedia2/lib/sndwav.cpp
Guilhem Lavaux 0662cd3286 Implemented Read in the PCM converter
Changed size_t to wxUint32
Added support for G72X
WAV format multi-codec handling


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-08-27 17:40:40 +00:00

262 lines
6.4 KiB
C++

// --------------------------------------------------------------------------
// Name: sndwav.cpp
// Purpose:
// Date: 08/11/1999
// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
// CVSID: $Id$
// --------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "sndwav.cpp"
#endif
#include <wx/wxprec.h>
#include <wx/stream.h>
#include <wx/datstrm.h>
#include <wx/filefn.h>
#include "sndbase.h"
#include "sndcodec.h"
#include "sndfile.h"
#include "sndpcm.h"
#include "sndg72x.h"
#include "sndwav.h"
#define BUILD_SIGNATURE(a,b,c,d) (((wxUint32)a) | (((wxUint32)b) << 8) | (((wxUint32)c) << 16) | (((wxUint32)d) << 24))
#define RIFF_SIGNATURE BUILD_SIGNATURE('R','I','F','F')
#define WAVE_SIGNATURE BUILD_SIGNATURE('W','A','V','E')
#define FMT_SIGNATURE BUILD_SIGNATURE('f','m','t',' ')
#define DATA_SIGNATURE BUILD_SIGNATURE('d','a','t','a')
#define HEADER_SIZE 4+4 + 4+4+16 + 4+4
// 4+4 => NAME + LEN
// 16 => fmt size
wxSoundWave::wxSoundWave(wxInputStream& stream, wxSoundStream& io_sound)
: wxSoundFileStream(stream, io_sound)
{
}
wxSoundWave::wxSoundWave(wxOutputStream& stream, wxSoundStream& io_sound)
: wxSoundFileStream(stream, io_sound)
{
}
wxSoundWave::~wxSoundWave()
{
}
#define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
bool wxSoundWave::CanRead()
{
wxUint32 len, signature;
m_snderror = wxSOUND_NOERR;
FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
if (wxUINT32_SWAP_ON_BE(signature) != RIFF_SIGNATURE) {
m_input->Ungetch(&signature, 4);
return FALSE;
}
m_input->Read(&len, 4);
FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
if (wxUINT32_SWAP_ON_BE(signature) != WAVE_SIGNATURE) {
m_input->Ungetch(&signature, 4);
return FALSE;
}
m_input->Ungetch("RIFF", 4);
m_input->Ungetch(&len, 4);
m_input->Ungetch("WAVE", 4);
return TRUE;
}
bool wxSoundWave::HandlePCM(wxDataInputStream& data, wxUint16 channels,
wxUint32 sample_fq, wxUint32 byte_p_sec,
wxUint16 byte_p_spl, wxUint16 bits_p_spl)
{
wxSoundFormatPcm sndformat;
sndformat.SetSampleRate(sample_fq);
sndformat.SetBPS(bits_p_spl);
sndformat.SetChannels(channels);
sndformat.Signed(TRUE);
sndformat.SetOrder(wxLITTLE_ENDIAN);
if (!SetSoundFormat(sndformat))
return FALSE;
return TRUE;
}
bool wxSoundWave::HandleG721(wxDataInputStream& data, wxUint16 channels,
wxUint32 sample_fq, wxUint32 byte_p_sec,
wxUint16 byte_p_spl, wxUint16 bits_p_spl)
{
wxSoundFormatG72X sndformat;
sndformat.SetSampleRate(sample_fq);
sndformat.SetG72XType(wxSOUND_G721);
if (!SetSoundFormat(sndformat))
return FALSE;
return TRUE;
}
bool wxSoundWave::PrepareToPlay()
{
wxUint32 signature, len;
bool end_headers;
if (!m_input) {
m_snderror = wxSOUND_INVSTRM;
return FALSE;
}
wxDataInputStream data(*m_input);
data.BigEndianOrdered(FALSE);
FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != RIFF_SIGNATURE, wxSOUND_INVSTRM);
// "RIFF"
len = data.Read32();
FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
// dummy len
FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != WAVE_SIGNATURE, wxSOUND_INVSTRM);
// "WAVE"
end_headers = FALSE;
while (!end_headers) {
FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
len = data.Read32();
FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
switch (wxUINT32_SWAP_ON_BE(signature)) {
case FMT_SIGNATURE: { // "fmt "
wxUint16 format, channels, byte_p_spl, bits_p_spl;
wxUint32 sample_fq, byte_p_sec;
data >> format >> channels >> sample_fq
>> byte_p_sec >> byte_p_spl >> bits_p_spl;
switch (format) {
case 0x01:
if (!HandlePCM(data, channels, sample_fq,
byte_p_sec, byte_p_spl, bits_p_spl))
return FALSE;
break;
case 0x40:
if (!HandleG721(data, channels, sample_fq,
byte_p_sec, byte_p_spl, bits_p_spl))
return FALSE;
break;
default:
m_snderror = wxSOUND_NOCODEC;
return FALSE;
}
break;
}
case DATA_SIGNATURE: // "data"
end_headers = TRUE;
break;
default:
m_input->SeekI(len, wxFromCurrent);
break;
}
}
return TRUE;
}
bool wxSoundWave::PrepareToRecord(unsigned long time)
{
#define WRITE_SIGNATURE(sig) \
signature = sig; \
signature = wxUINT32_SWAP_ON_BE(signature); \
FAIL_WITH(m_output->Write(&signature, 4).LastWrite() != 4, wxSOUND_INVSTRM);
wxUint32 signature, len;
if (!m_output) {
m_snderror = wxSOUND_INVSTRM;
return FALSE;
}
wxDataOutputStream data(*m_output);
data.BigEndianOrdered(FALSE);
len = m_sndformat->GetBytesFromTime(time);
len += HEADER_SIZE;
WRITE_SIGNATURE(RIFF_SIGNATURE);
data << len;
FAIL_WITH(m_output->LastWrite() != 4, wxSOUND_INVSTRM);
WRITE_SIGNATURE(WAVE_SIGNATURE);
{
wxUint16 format, channels, byte_p_spl, bits_p_spl;
wxUint32 sample_fq, byte_p_sec;
wxSoundFormatPcm *pcm;
if (m_sndformat->GetType() != wxSOUND_PCM) {
m_snderror = wxSOUND_NOCODEC;
return FALSE;
}
pcm = (wxSoundFormatPcm *)(m_sndformat->Clone());
WRITE_SIGNATURE(FMT_SIGNATURE);
data.Write32(16);
sample_fq = pcm->GetSampleRate();
bits_p_spl = pcm->GetBPS();
channels = pcm->GetChannels();
byte_p_spl = pcm->GetBPS() / 8;
byte_p_sec = pcm->GetBytesFromTime(1);
format = 1;
data << format << channels << sample_fq
<< byte_p_sec << byte_p_spl << bits_p_spl;
pcm->Signed(TRUE);
pcm->SetOrder(wxLITTLE_ENDIAN);
if (!SetSoundFormat(*pcm))
return FALSE;
delete pcm;
}
WRITE_SIGNATURE(DATA_SIGNATURE);
data.Write32(m_sndformat->GetBytesFromTime(time));
return TRUE;
}
bool wxSoundWave::FinishRecording()
{
// TODO: Update headers when we stop before the specified time (if possible)
return TRUE;
}
wxUint32 wxSoundWave::GetData(void *buffer, wxUint32 len)
{
return m_input->Read(buffer, len).LastRead();
}
wxUint32 wxSoundWave::PutData(const void *buffer, wxUint32 len)
{
return m_output->Write(buffer, len).LastWrite();
}