// Name: sndfile.cpp
// Purpose:
// Date: 08/11/1999
-// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
+// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999, 2000
// CVSID: $Id$
// --------------------------------------------------------------------------
#include <wx/wxprec.h>
#include "sndfile.h"
#include "sndcpcm.h"
#include "sndulaw.h"
+#include "sndg72x.h"
// --------------------------------------------------------------------------
// Sound codec router
+// A very important class: it ensures that everybody is satisfied.
+// It is supposed to create as many codec as it is necessary to transform
+// a signal in a specific format in an another.
// --------------------------------------------------------------------------
-
wxSoundRouterStream::wxSoundRouterStream(wxSoundStream& sndio)
: wxSoundStreamCodec(sndio)
{
- m_router = NULL;
+ m_router = NULL;
}
wxSoundRouterStream::~wxSoundRouterStream()
{
- if (m_router)
- delete m_router;
+ if (m_router)
+ delete m_router;
}
-wxSoundStream& wxSoundRouterStream::Read(void *buffer, size_t len)
+// --------------------------------------------------------------------------
+// Read(void *buffer, wxUint32 len): It reads data synchronously. See sndbase.h
+// for possible errors and behaviours ...
+// --------------------------------------------------------------------------
+wxSoundStream& wxSoundRouterStream::Read(void *buffer, wxUint32 len)
{
- if (m_router) {
- m_router->Read(buffer, len);
- m_snderror = m_router->GetError();
- m_lastcount = m_router->GetLastAccess();
- } else {
- m_sndio->Read(buffer, len);
- m_snderror = m_sndio->GetError();
- m_lastcount = m_sndio->GetLastAccess();
- }
- return *this;
+ if (m_router) {
+ m_router->Read(buffer, len);
+ m_snderror = m_router->GetError();
+ m_lastcount = m_router->GetLastAccess();
+ } else {
+ m_sndio->Read(buffer, len);
+ m_snderror = m_sndio->GetError();
+ m_lastcount = m_sndio->GetLastAccess();
+ }
+ return *this;
}
-wxSoundStream& wxSoundRouterStream::Write(const void *buffer, size_t len)
+// --------------------------------------------------------------------------
+// Write(const void *buffer, wxUint32 len): It writes data synchronously
+// --------------------------------------------------------------------------
+wxSoundStream& wxSoundRouterStream::Write(const void *buffer, wxUint32 len)
{
- if (m_router) {
- m_router->Write(buffer, len);
- m_snderror = m_router->GetError();
- m_lastcount = m_router->GetLastAccess();
- } else {
- m_sndio->Write(buffer, len);
- m_snderror = m_sndio->GetError();
- m_lastcount = m_sndio->GetLastAccess();
+ if (m_router) {
+ m_router->Write(buffer, len);
+ m_snderror = m_router->GetError();
+ m_lastcount = m_router->GetLastAccess();
+ } else {
+ m_sndio->Write(buffer, len);
+ m_snderror = m_sndio->GetError();
+ m_lastcount = m_sndio->GetLastAccess();
}
return *this;
}
+// --------------------------------------------------------------------------
+// SetSoundFormat(const wxSoundFormatBase& format) first tries to setup the
+// sound driver using the specified format. If this fails, it uses personnal
+// codec converters: for the moment there is a PCM converter (PCM to PCM:
+// with optional resampling, ...), an ULAW converter (ULAW to PCM), a G72X
+// converter (G72X to PCM). If nothing works, it returns FALSE.
+// --------------------------------------------------------------------------
bool wxSoundRouterStream::SetSoundFormat(const wxSoundFormatBase& format)
{
- if (m_router)
- delete m_router;
-
- if (m_sndio->SetSoundFormat(format)) {
- wxSoundStream::SetSoundFormat(m_sndio->GetSoundFormat());
+ if (m_router)
+ delete m_router;
+
+ // First, we try to setup the sound device
+ if (m_sndio->SetSoundFormat(format)) {
+ // We are lucky, it is working.
+ wxSoundStream::SetSoundFormat(m_sndio->GetSoundFormat());
+ return TRUE;
+ }
+
+ switch(format.GetType()) {
+ case wxSOUND_NOFORMAT:
+ return FALSE;
+ case wxSOUND_PCM:
+ m_router = new wxSoundStreamPcm(*m_sndio);
+ m_router->SetSoundFormat(format);
+ break;
+ case wxSOUND_ULAW:
+ m_router = new wxSoundStreamUlaw(*m_sndio);
+ m_router->SetSoundFormat(format);
+ break;
+ case wxSOUND_G72X:
+ m_router = new wxSoundStreamG72X(*m_sndio);
+ m_router->SetSoundFormat(format);
+ break;
+ }
+ wxSoundStream::SetSoundFormat(m_router->GetSoundFormat());
return TRUE;
- }
+}
- switch(format.GetType()) {
- case wxSOUND_NOFORMAT:
- return FALSE;
- case wxSOUND_PCM:
- m_router = new wxSoundStreamPcm(*m_sndio);
- m_router->SetSoundFormat(format);
- break;
- case wxSOUND_ULAW:
- m_router = new wxSoundStreamUlaw(*m_sndio);
- m_router->SetSoundFormat(format);
- break;
- }
- wxSoundStream::SetSoundFormat(m_router->GetSoundFormat());
- return TRUE;
+// --------------------------------------------------------------------------
+// GetBestSize() returns the specific best buffer size a sound driver
+// can manage. It means that it will be easier for it to manage the buffer
+// and so it will be faster and in some case more accurate for real-time event.
+// --------------------------------------------------------------------------
+wxUint32 wxSoundRouterStream::GetBestSize() const
+{
+ if (m_router)
+ return m_router->GetBestSize();
+ else
+ return m_sndio->GetBestSize();
}
+// --------------------------------------------------------------------------
+// StartProduction(int evt). See sndbase.h
+// --------------------------------------------------------------------------
bool wxSoundRouterStream::StartProduction(int evt)
{
- if (!m_router) {
- if (m_sndio->StartProduction(evt))
- return TRUE;
-
- m_snderror = m_sndio->GetError();
- m_lastcount = m_sndio->GetLastAccess();
+ if (!m_router) {
+ if (m_sndio->StartProduction(evt))
+ return TRUE;
+
+ m_snderror = m_sndio->GetError();
+ m_lastcount = m_sndio->GetLastAccess();
+ return FALSE;
+ }
+
+ if (m_router->StartProduction(evt))
+ return TRUE;
+
+ m_snderror = m_router->GetError();
+ m_lastcount = m_router->GetLastAccess();
return FALSE;
- }
-
- if (m_router->StartProduction(evt))
- return TRUE;
-
- m_snderror = m_router->GetError();
- m_lastcount = m_router->GetLastAccess();
- return FALSE;
}
+// --------------------------------------------------------------------------
+// StopProduction(). See sndbase.h
+// --------------------------------------------------------------------------
bool wxSoundRouterStream::StopProduction()
{
- if (!m_router) {
- if (m_sndio->StopProduction())
- return TRUE;
-
- m_snderror = m_sndio->GetError();
- m_lastcount = m_sndio->GetLastAccess();
+ if (!m_router) {
+ if (m_sndio->StopProduction())
+ return TRUE;
+
+ m_snderror = m_sndio->GetError();
+ m_lastcount = m_sndio->GetLastAccess();
+ return FALSE;
+ }
+
+ if (m_router->StopProduction())
+ return TRUE;
+
+ m_snderror = m_router->GetError();
+ m_lastcount = m_router->GetLastAccess();
return FALSE;
- }
-
- if (m_router->StopProduction())
- return TRUE;
-
- m_snderror = m_router->GetError();
- m_lastcount = m_router->GetLastAccess();
- return FALSE;
}
-
// --------------------------------------------------------------------------
// wxSoundFileStream: generic reader
wxSoundFileStream::wxSoundFileStream(wxInputStream& stream,
wxSoundStream& io_sound)
- : m_codec(io_sound), m_sndio(&io_sound),
- m_input(&stream), m_output(NULL), m_state(wxSOUND_FILE_STOPPED)
+ : m_codec(io_sound), m_sndio(&io_sound),
+ m_input(&stream), m_output(NULL), m_state(wxSOUND_FILE_STOPPED)
{
+ m_length = 0;
+ m_bytes_left = 0;
+ m_prepared = FALSE;
}
wxSoundFileStream::wxSoundFileStream(wxOutputStream& stream,
: m_codec(io_sound), m_sndio(&io_sound),
m_input(NULL), m_output(&stream), m_state(wxSOUND_FILE_STOPPED)
{
+ m_length = 0;
+ m_bytes_left = 0;
+ m_prepared = FALSE;
}
wxSoundFileStream::~wxSoundFileStream()
if (m_state != wxSOUND_FILE_STOPPED)
return FALSE;
- if (!PrepareToPlay())
- return FALSE;
+ if (!m_prepared)
+ if (!PrepareToPlay())
+ return FALSE;
+
+ m_state = wxSOUND_FILE_PLAYING;
if (!StartProduction(wxSOUND_OUTPUT))
return FALSE;
- m_state = wxSOUND_FILE_PLAYING;
return TRUE;
}
-bool wxSoundFileStream::Record(unsigned long time)
+bool wxSoundFileStream::Record(wxUint32 time)
{
if (m_state != wxSOUND_FILE_STOPPED)
return FALSE;
if (!PrepareToRecord(time))
return FALSE;
- m_len = m_sndformat->GetBytesFromTime(time);
+ FinishPreparation(m_sndformat->GetBytesFromTime(time));
+ m_state = wxSOUND_FILE_RECORDING;
if (!StartProduction(wxSOUND_INPUT))
return FALSE;
- m_state = wxSOUND_FILE_RECORDING;
return TRUE;
}
if (!StopProduction())
return FALSE;
+ m_prepared = FALSE;
+
if (m_state == wxSOUND_FILE_RECORDING)
if (!FinishRecording()) {
m_state = wxSOUND_FILE_STOPPED;
return FALSE;
}
+
+ if (m_input)
+ m_input->SeekI(0, wxFromStart);
+
+ if (m_output)
+ m_output->SeekO(0, wxFromStart);
- // TODO reset counter
m_state = wxSOUND_FILE_STOPPED;
return TRUE;
}
return TRUE;
}
-wxSoundStream& wxSoundFileStream::Read(void *buffer, size_t len)
+wxSoundStream& wxSoundFileStream::Read(void *buffer, wxUint32 len)
{
m_lastcount = GetData(buffer, len);
return *this;
}
-wxSoundStream& wxSoundFileStream::Write(const void *buffer, size_t len)
+wxSoundStream& wxSoundFileStream::Write(const void *buffer, wxUint32 len)
{
m_lastcount = PutData(buffer, len);
return *this;
}
-void wxSoundFileStream::SetDuplexMode(bool duplex)
-{
-}
-
bool wxSoundFileStream::StartProduction(int evt)
{
m_sndio->SetEventHandler(this);
return m_codec.StopProduction();
}
+void wxSoundFileStream::FinishPreparation(wxUint32 len)
+{
+ m_bytes_left = m_length = len;
+ m_prepared = TRUE;
+}
+
+wxString wxSoundFileStream::GetCodecName() const
+{
+ return wxString(wxT("wxSoundFileStream base codec"));
+}
+
+wxUint32 wxSoundFileStream::GetLength()
+{
+ if (m_input && !m_prepared && GetError() == wxSOUND_NOERR)
+ return (PrepareToPlay()) ? m_length : 0;
+
+ return m_length;
+}
+
+wxUint32 wxSoundFileStream::GetPosition()
+{
+ if (!m_prepared && m_input != NULL && GetError() == wxSOUND_NOERR)
+ PrepareToPlay();
+
+ return m_length-m_bytes_left;
+}
+
+wxUint32 wxSoundFileStream::SetPosition(wxUint32 new_position)
+{
+ if (!m_prepared && m_input != NULL && GetError() == wxSOUND_NOERR)
+ PrepareToPlay();
+
+ if (!m_prepared)
+ return 0;
+
+ if (!RepositionStream(new_position))
+ return m_length-m_bytes_left;
+
+ if (new_position >= m_length) {
+ m_bytes_left = 0;
+ return m_length;
+ }
+
+ m_bytes_left = m_length-new_position;
+ return new_position;
+}
+
void wxSoundFileStream::OnSoundEvent(int evt)
{
- size_t len = m_sndio->GetBestSize();
+ wxUint32 len = m_codec.GetBestSize();
char *buffer;
- buffer = new char[m_sndio->GetBestSize()];
+ buffer = new char[len];
wxSoundStream::OnSoundEvent(evt);
- switch(evt) {
- case wxSOUND_INPUT:
- if (len > m_len)
- len = m_len;
-
- len = m_codec.Read(buffer, len).GetLastAccess();
- PutData(buffer, len);
- m_len -= len;
- if (m_len == 0) {
- Stop();
- return;
- }
- break;
- case wxSOUND_OUTPUT:
- len = GetData(buffer, len);
- if (len == 0) {
- Stop();
- return;
+ while (!m_sndio->QueueFilled()) {
+ switch(evt) {
+ case wxSOUND_INPUT:
+ if (len > m_bytes_left)
+ len = m_bytes_left;
+
+ len = m_codec.Read(buffer, len).GetLastAccess();
+ PutData(buffer, len);
+ m_bytes_left -= len;
+ if (m_bytes_left == 0) {
+ Stop();
+ delete[] buffer;
+ return;
+ }
+ break;
+ case wxSOUND_OUTPUT:
+ if (len > m_bytes_left)
+ len = m_bytes_left;
+
+ len = GetData(buffer, len);
+ m_bytes_left -= len;
+ if (m_bytes_left == 0) {
+ Stop();
+ delete[] buffer;
+ return;
+ }
+ m_codec.Write(buffer, len);
+ break;
}
- m_codec.Write(buffer, len);
- break;
}
delete[] buffer;
}
projects / wxWidgets.git / blobdiff