// CVSID: $Id$
// --------------------------------------------------------------------------
#ifdef __GNUG__
-#pragma implementation "sndulaw.cpp"
+#pragma implementation "sndmsad.cpp"
+#endif
+
+#include "wx/wxprec.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/defs.h"
+ #include "wx/memory.h"
+ #include "wx/log.h"
#endif
-#include <wx/wxprec.h>
#include "wx/mmedia/sndbase.h"
#include "wx/mmedia/sndfile.h"
#include "wx/mmedia/sndpcm.h"
wxSoundFormatMSAdpcm::wxSoundFormatMSAdpcm()
: m_srate(22050)
{
- m_coefs = new wxMSAdpcmCoefs();
+ m_ncoefs = 0;
+ m_coefs_len = 0;
+ m_coefs = NULL;
}
wxSoundFormatMSAdpcm::~wxSoundFormatMSAdpcm()
{
- delete m_coefs;
+ if (m_ncoefs) {
+ wxUint16 i;
+
+ for (i=0;i<m_ncoefs;i++)
+ delete[] m_coefs[i];
+ delete[] m_coefs;
+ }
+
}
void wxSoundFormatMSAdpcm::SetSampleRate(wxUint32 srate)
return m_srate;
}
+void wxSoundFormatMSAdpcm::SetChannels(wxUint16 nchannels)
+{
+ m_nchannels = nchannels;
+}
+
+wxUint16 wxSoundFormatMSAdpcm::GetChannels() const
+{
+ return m_nchannels;
+}
+
+void wxSoundFormatMSAdpcm::SetCoefs(wxInt16 **WXUNUSED(coefs), wxUint16 ncoefs,
+ wxUint16 coefs_len)
+{
+ wxUint16 i;
+
+ if (m_ncoefs) {
+ for (i=0;i<m_ncoefs;i++)
+ delete[] (m_coefs[i]);
+ delete[] m_coefs;
+ }
+ // TODO: Add some memory checking here
+ m_coefs = new wxInt16 *[ncoefs];
+
+ for (i=0;i<ncoefs;i++)
+ m_coefs[i] = new wxInt16[coefs_len];
+
+ m_ncoefs = ncoefs;
+ m_coefs_len = coefs_len;
+}
+
+void wxSoundFormatMSAdpcm::GetCoefs(wxInt16 **& coefs, wxUint16& ncoefs,
+ wxUint16& coefs_len) const
+{
+ coefs = m_coefs;
+ ncoefs = m_ncoefs;
+ coefs_len = m_coefs_len;
+}
+
+void wxSoundFormatMSAdpcm::SetBlockSize(wxUint16 block_size)
+{
+ m_block_size = block_size;
+}
+
+wxUint16 wxSoundFormatMSAdpcm::GetBlockSize() const
+{
+ return m_block_size;
+}
+
wxSoundFormatBase *wxSoundFormatMSAdpcm::Clone() const
{
wxSoundFormatMSAdpcm *adpcm = new wxSoundFormatMSAdpcm();
- adpcm->m_srate = m_srate;
- adpcm->m_coefs = new wxMSAdpcmCoefs();
- *(adpcm->m_coefs) = *m_coefs;
+ adpcm->m_srate = m_srate;
+ adpcm->SetCoefs(m_coefs, m_ncoefs, m_coefs_len);
+ adpcm->m_nchannels = m_nchannels;
+ adpcm->m_block_size = m_block_size;
return adpcm;
}
wxUint32 wxSoundFormatMSAdpcm::GetTimeFromBytes(wxUint32 bytes) const
{
- return 0;
+ return 2 * bytes / (m_nchannels * m_srate);
}
wxUint32 wxSoundFormatMSAdpcm::GetBytesFromTime(wxUint32 time) const
{
- return 0;
+ return time * m_nchannels * m_srate / 2;
}
bool wxSoundFormatMSAdpcm::operator !=(const wxSoundFormatBase& frmt2) const
{
- wxSoundFormatUlaw *adpcm = (wxSoundFormatMSAdpcm *)&frmt2;
+ const wxSoundFormatMSAdpcm *adpcm = (const wxSoundFormatMSAdpcm *)&frmt2;
if (frmt2.GetType() != wxSOUND_MSADPCM)
return TRUE;
- return (adpcm->m_srate != m_srate) && 0;
+ return (adpcm->m_srate != m_srate) && (adpcm->m_nchannels != m_nchannels);
}
// --------------------------------------------------------------------------
// PCM converter
m_router = new wxSoundRouterStream(sndio);
m_got_header = FALSE;
+ m_stereo = FALSE;
}
wxSoundStreamMSAdpcm::~wxSoundStreamMSAdpcm()
delete m_router;
}
-wxSoundStream& wxSoundStreamMSAdpcm::Read(void *buffer, wxUint32 len)
+wxSoundStream& wxSoundStreamMSAdpcm::Read(void *WXUNUSED(buffer), wxUint32 WXUNUSED(len))
{
m_snderror = wxSOUND_NOCODEC;
m_lastcount = 0;
}
static wxInt16 gl_ADPCMcoeff_delta[] = {
- 230, 230, 230, 230, 307, 409, 512, 614, 768, 614, 512, 409, 307, 230, 230, 230
+ 230, 230, 230, 230, 307, 409, 512, 614, 768, 614, 512, 409, 307,
+ 230, 230, 230
};
-static wxInt16 gl_ADPCMcoeff_1[] = {
- 256, 512, 0, 192, 240, 460, 392
-};
-
-static wxInt16 gl_ADPCMcoeff_2[] = {
- 0, -256, 0, 64, 0, -208, -232
-};
-
-wxSoundStream& wxSoundStreamMSAdpcm::Write(const void *buffer, wxUint32 len)
+wxUint32 wxSoundStreamMSAdpcm::DecodeMonoADPCM(const void *in_buffer,
+ void *out_buffer,
+ wxUint32 in_len)
{
- wxInt16 delta;
- wxUint8 ADPCMdata;
- wxUint16 *PCMdata;
- wxInt16 coeff1, coeff2;
-
-#define GET_DATA_16 (*ADPCMdata++ | ((wxUint32)(*ADPCMdata++) << 8);
-#define GET_DATA_8 (*ADPCMdata++)
-
- if (!m_got_header) {
- i_predict = GET_DATA_8;
- delta = GET_DATA_16;
- samp1 = GET_DATA_16;
- PCMdata = GET_DATA_16;
- len -= 3*2 + 1;
- m_got_header = TRUE;
-
- coeff1 = gl_ADPCMcoeff_1[i_predict];
- coeff2 = gl_ADPCMcoeff_2[i_predict];
+ wxUint8 *ADPCMdata;
+ wxInt16 *PCMdata;
+ AdpcmState *state;
+ wxUint32 out_len;
+
+ ADPCMdata = (wxUint8 *)in_buffer;
+ PCMdata = (wxInt16 *)out_buffer;
+ state = &m_state[0];
+
+#define GET_DATA_16(i) i = *ADPCMdata++, i |= ((wxUint32)(*ADPCMdata++) << 8)
+#define GET_DATA_8(i) i = (*ADPCMdata++)
+
+ out_len = 0;
+ while (in_len != 0) {
+ if (m_next_block == 0) {
+ GET_DATA_8(state->predictor);
+ GET_DATA_16(state->iDelta);
+
+ GET_DATA_16(state->samp1);
+ GET_DATA_16(state->samp2);
+
+ state->coeff[0] = state->coeff[1] = m_coefs[0][ state->predictor ];
+
+ *PCMdata++ = state->samp2;
+ *PCMdata++ = state->samp1;
+ in_len -= 7;
+ out_len += 4;
+ m_next_block = m_block_size;
+ continue;
+ }
+
+ while (in_len != 0 && m_next_block != 0) {
+ wxUint8 nib[2];
+
+ GET_DATA_8(nib[0]);
+ nib[1] = (nib[0] >> 4) & 0x0f;
+ nib[0] &= 0x0f;
+
+ Nibble(nib[0], state, &PCMdata);
+ Nibble(nib[1], state, &PCMdata);
+
+ in_len -= 4;
+ out_len += 4;
+ m_next_block -= 4;
+ }
}
+
+ return out_len;
+
+#undef GET_DATA_16
+#undef GET_DATA_8
+}
+
+wxUint32 wxSoundStreamMSAdpcm::DecodeStereoADPCM(const void *in_buffer,
+ void *out_buffer,
+ wxUint32 in_len)
+{
+ wxUint8 *ADPCMdata;
+ wxInt16 *PCMdata;
+ AdpcmState *state0, *state1;
+ wxUint32 out_len;
- while (len > 0) {
- nyb1 = GET_DATA_8;
- nyb0 = (nyb1 & 0xf0) >> 4;
- nyb1 &= 0x0f;
+ ADPCMdata = (wxUint8 *)in_buffer;
+ PCMdata = (wxInt16 *)out_buffer;
+
+ state0 = &m_state[0];
+ state1 = &m_state[1];
+
+#define GET_DATA_16(i) i = *ADPCMdata++, i |= ((wxUint32)(*ADPCMdata++) << 8)
+#define GET_DATA_8(i) i = (*ADPCMdata++)
+
+ out_len = 0;
+ while (in_len != 0) {
+ if (!m_next_block) {
+ GET_DATA_8(state0->predictor);
+ GET_DATA_8(state1->predictor);
+
+ GET_DATA_16(state0->iDelta);
+ GET_DATA_16(state1->iDelta);
+ GET_DATA_16(state0->samp1);
+ GET_DATA_16(state1->samp1);
+ GET_DATA_16(state0->samp2);
+ GET_DATA_16(state1->samp2);
+ *PCMdata++ = state0->samp2;
+ *PCMdata++ = state1->samp2;
+ *PCMdata++ = state0->samp1;
+ *PCMdata++ = state1->samp1;
+
+ in_len -= 14;
+ out_len += 8;
+ m_next_block = m_block_size;
+ continue;
+ }
+
+ while (in_len != 0 && m_next_block > 0) {
+ wxUint8 nib[2];
+
+ GET_DATA_8(nib[0]);
+ nib[1] = (nib[0] >> 4) & 0x0f;
+ nib[0] &= 0x0f;
+
+ Nibble(nib[0], state0, &PCMdata);
+ Nibble(nib[1], state1, &PCMdata);
+
+ in_len -= 4;
+ out_len += 4;
+ m_next_block -= 4;
+ }
+ }
+
+ return out_len;
+
+#undef GET_DATA_16
+#undef GET_DATA_8
+}
+
+void wxSoundStreamMSAdpcm::Nibble(wxInt8 nyb,
+ AdpcmState *state,
+ wxInt16 **out_buffer)
+{
+ wxUint32 new_delta;
+ wxInt32 new_sample;
+
+ // First: compute the next delta value
+ new_delta = (state->iDelta * gl_ADPCMcoeff_delta[nyb]) >> 8;
+ // If null, minor it by 16
+ if (!new_delta)
+ new_delta = 16;
+
+ // Barycentre
+ new_sample = (state->samp1 * state->coeff[0] +
+ state->samp2 * state->coeff[1]) / 256;
+
+ // Regenerate the sign
+ if (nyb & 0x08)
+ nyb -= 0x10;
+
+ new_sample += state->iDelta * nyb;
+
+ // Samples must be in [-32767, 32768]
+ if (new_sample < -32768)
+ new_sample = -32768;
+ else if (new_sample > 32767)
+ new_sample = 32767;
+
+ state->iDelta = new_delta;
+ state->samp2 = state->samp1;
+ state->samp1 = new_sample;
+
+ *(*out_buffer)++ = new_sample;
+}
+
+wxSoundStream& wxSoundStreamMSAdpcm::Write(const void *buffer, wxUint32 len)
+{
+ wxUint8 *out_buf;
+ wxUint32 new_len;
+
+ // TODO: prealloc the output buffer
+ out_buf = new wxUint8[len*2];
+
+ if (!m_stereo)
+ new_len = DecodeMonoADPCM(buffer, out_buf, len);
+ else
+ new_len = DecodeStereoADPCM(buffer, out_buf, len);
+
+ m_router->Write(out_buf, new_len);
+
+ m_lastcount = len;
+ m_snderror = wxSOUND_NOERROR;
+
+ delete[] out_buf;
+
return *this;
}
bool wxSoundStreamMSAdpcm::SetSoundFormat(const wxSoundFormatBase& format)
{
- if (format.GetType() != wxSOUND_ULAW) {
+ if (format.GetType() != wxSOUND_MSADPCM) {
m_snderror = wxSOUND_INVFRMT;
return FALSE;
}
wxSoundFormatPcm pcm;
- wxSoundFormatUlaw *ulaw;
+ wxSoundFormatMSAdpcm *adpcm;
+ wxUint16 ncoefs, coefs_len;
wxSoundStreamCodec::SetSoundFormat(format);
- ulaw = (wxSoundFormatMSAdpcm *)m_sndformat;
+ adpcm = (wxSoundFormatMSAdpcm *)m_sndformat;
+
+ adpcm->GetCoefs(m_coefs, ncoefs, coefs_len);
+
+ if (!ncoefs) {
+ wxLogError(wxT("Number of ADPCM coefficients must be non null"));
+ return FALSE;
+ }
pcm.SetSampleRate(adpcm->GetSampleRate());
pcm.SetBPS(16);
pcm.SetChannels(adpcm->GetChannels());
pcm.Signed(TRUE);
pcm.SetOrder(wxBYTE_ORDER);
+
+ m_stereo = (adpcm->GetChannels() == 2);
+ m_block_size = adpcm->GetBlockSize();
+ m_next_block = 0;
m_router->SetSoundFormat(pcm);
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