wxSoundAiff::wxSoundAiff(wxInputStream& stream, wxSoundStream& io_sound)
: wxSoundFileStream(stream, io_sound)
{
+ m_base_offset = wxInvalidOffset;
}
wxSoundAiff::wxSoundAiff(wxOutputStream& stream, wxSoundStream& io_sound)
: wxSoundFileStream(stream, io_sound)
{
+ m_base_offset = wxInvalidOffset;
}
wxSoundAiff::~wxSoundAiff()
{
}
-#define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
-
-bool wxSoundAiff::PrepareToPlay()
+wxString wxSoundAiff::GetCodecName() const
{
- wxDataInputStream data(*m_input);
- wxUint32 signature, len, ssnd;
- bool end_headers;
-
- if (!m_input) {
- m_snderror = wxSOUND_INVSTRM;
- return FALSE;
- }
-
- data.BigEndianOrdered(TRUE);
-
- FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
- FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != FORM_SIGNATURE, wxSOUND_INVSTRM);
- // "FORM"
+ return "wxSoundAiff codec";
+}
- 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) != AIFF_SIGNATURE &&
- wxUINT32_SWAP_ON_BE(signature) != AIFC_SIGNATURE, wxSOUND_INVSTRM);
- // "AIFF" / "AIFC"
-
- end_headers = FALSE;
- while (!end_headers) {
- FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
+bool wxSoundAiff::CanRead()
+{
+ wxUint32 signature1, signature2, len;
+
+ if (m_input->Read(&signature1, 4).LastRead() != 4)
+ return FALSE;
+
+ if (wxUINT32_SWAP_ON_BE(signature1) != FORM_SIGNATURE) {
+ m_input->Ungetch(&signature1, 4);
+ return FALSE;
+ }
+
+ m_input->Read(&len, 4);
+ if (m_input->LastRead() != 4) {
+ m_input->Ungetch(&len, m_input->LastRead());
+ m_input->Ungetch(&signature1, 4);
+ return FALSE;
+ }
+
+ if (m_input->Read(&signature2, 4).LastRead() != 4) {
+ m_input->Ungetch(&signature2, m_input->LastRead());
+ m_input->Ungetch(&len, 4);
+ m_input->Ungetch(&signature1, 4);
+ return FALSE;
+ }
+
+ m_input->Ungetch(&signature2, 4);
+ m_input->Ungetch(&len, 4);
+ m_input->Ungetch(&signature1, 4);
+
+ if (
+ wxUINT32_SWAP_ON_BE(signature2) != AIFF_SIGNATURE &&
+ wxUINT32_SWAP_ON_BE(signature2) != AIFC_SIGNATURE)
+ return FALSE;
+
+ return TRUE;
+}
- len = data.Read32();
- FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
+#define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
- switch (wxUINT32_SWAP_ON_BE(signature)) {
- case COMM_SIGNATURE: { // "COMM"
- wxUint16 channels, bps;
- wxUint32 num_samples;
- double srate;
- wxSoundFormatPcm sndformat;
-
- data >> channels >> num_samples >> bps >> srate;
-
- sndformat.SetSampleRate((wxUint32) srate);
- sndformat.SetBPS(bps);
- sndformat.SetChannels(channels);
- sndformat.Signed(TRUE);
- sndformat.SetOrder(wxBIG_ENDIAN);
-
- if (!SetSoundFormat(sndformat))
+bool wxSoundAiff::PrepareToPlay()
+{
+ wxDataInputStream data(*m_input);
+ wxUint32 signature, len, ssnd;
+ bool end_headers;
+
+ if (!m_input) {
+ m_snderror = wxSOUND_INVSTRM;
return FALSE;
- m_input->SeekI(len-18, wxFromCurrent);
- break;
- }
- case SSND_SIGNATURE: { // "SSND"
- data >> ssnd;
- // m_input->SeekI(4, wxFromCurrent); // Pass an INT32
- // m_input->SeekI(len-4, wxFromCurrent); // Pass the rest
- m_input->SeekI(ssnd + 4, wxFromCurrent);
- end_headers = TRUE;
- break;
}
- default:
- m_input->SeekI(len, wxFromCurrent);
- break;
+
+ data.BigEndianOrdered(TRUE);
+
+ FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
+ FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != FORM_SIGNATURE, wxSOUND_INVSTRM);
+ // "FORM"
+
+ 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) != AIFF_SIGNATURE &&
+ wxUINT32_SWAP_ON_BE(signature) != AIFC_SIGNATURE, wxSOUND_INVSTRM);
+ // "AIFF" / "AIFC"
+
+ 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 COMM_SIGNATURE: { // "COMM"
+ wxUint16 channels, bps;
+ wxUint32 num_samples;
+ double srate;
+ wxSoundFormatPcm sndformat;
+
+ data >> channels >> num_samples >> bps >> srate;
+
+ sndformat.SetSampleRate((wxUint32) srate);
+ sndformat.SetBPS(bps);
+ sndformat.SetChannels(channels);
+ sndformat.Signed(FALSE);
+ sndformat.SetOrder(wxBIG_ENDIAN);
+
+ if (!SetSoundFormat(sndformat))
+ return FALSE;
+ m_input->SeekI(len-18, wxFromCurrent);
+ break;
+ }
+ case SSND_SIGNATURE: { // "SSND"
+ data >> ssnd;
+ // m_input->SeekI(4, wxFromCurrent); // Pass an INT32
+ // m_input->SeekI(len-4, wxFromCurrent); // Pass the rest
+ m_input->SeekI(ssnd + 4, wxFromCurrent);
+ m_base_offset = m_input->TellI();
+ FinishPreparation(len - 8);
+ end_headers = TRUE;
+ break;
+ }
+ default:
+ m_input->SeekI(len, wxFromCurrent);
+ break;
+ }
}
- }
- return TRUE;
+ return TRUE;
}
-bool wxSoundAiff::PrepareToRecord(unsigned long time)
+bool wxSoundAiff::PrepareToRecord(wxUint32 time)
{
- // TODO
- return FALSE;
+ // TODO
+ return FALSE;
}
bool wxSoundAiff::FinishRecording()
{
- // TODO
- return FALSE;
+ // TODO
+ return FALSE;
+}
+
+bool wxSoundAiff::RepositionStream(wxUint32 position)
+{
+ if (m_base_offset == wxInvalidOffset)
+ return FALSE;
+ m_input->SeekI(m_base_offset, wxFromStart);
+ return TRUE;
}
-size_t wxSoundAiff::GetData(void *buffer, size_t len)
+wxUint32 wxSoundAiff::GetData(void *buffer, wxUint32 len)
{
- return m_input->Read(buffer, len).LastRead();
+ return m_input->Read(buffer, len).LastRead();
}
-size_t wxSoundAiff::PutData(const void *buffer, size_t len)
+wxUint32 wxSoundAiff::PutData(const void *buffer, wxUint32 len)
{
- return m_output->Write(buffer, len).LastWrite();
+ return m_output->Write(buffer, len).LastWrite();
}
projects / wxWidgets.git / blobdiff