utils/wxMMedia2/lib/sndwav.cpp

   1 // --------------------------------------------------------------------------
   2 // Name: sndwav.cpp
   3 // Purpose:
   4 // Date: 08/11/1999
   5 // Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
   6 // CVSID: $Id$
   7 // --------------------------------------------------------------------------
   8 #ifdef __GNUG__
   9 #pragma implementation "sndwav.cpp"
  10 #endif
  11
  12 #include <wx/wxprec.h>
  13
  14 #include <wx/stream.h>
  15 #include <wx/datstrm.h>
  16 #include <wx/filefn.h>
  17 #include <wx/mstream.h>
  18
  19 #include "sndbase.h"
  20 #include "sndcodec.h"
  21 #include "sndfile.h"
  22 #include "sndpcm.h"
  23 #include "sndg72x.h"
  24 #include "sndwav.h"
  25
  26 #define BUILD_SIGNATURE(a,b,c,d) (((wxUint32)a) | (((wxUint32)b) << 8) | (((wxUint32)c) << 16)  | (((wxUint32)d) << 24))
  27
  28 #define RIFF_SIGNATURE BUILD_SIGNATURE('R','I','F','F')
  29 #define WAVE_SIGNATURE BUILD_SIGNATURE('W','A','V','E')
  30 #define FMT_SIGNATURE BUILD_SIGNATURE('f','m','t',' ')
  31 #define DATA_SIGNATURE BUILD_SIGNATURE('d','a','t','a')
  32
  33 #define HEADER_SIZE 4+4 + 4+4+16 + 4+4
  34  // 4+4 => NAME + LEN
  35  // 16 => fmt size
  36
  37 wxSoundWave::wxSoundWave(wxInputStream& stream, wxSoundStream& io_sound)
  38   : wxSoundFileStream(stream, io_sound)
  39 {
  40 }
  41
  42 wxSoundWave::wxSoundWave(wxOutputStream& stream, wxSoundStream& io_sound)
  43   : wxSoundFileStream(stream, io_sound)
  44 {
  45 }
  46
  47 wxSoundWave::~wxSoundWave()
  48 {
  49 }
  50
  51 #define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
  52
  53 bool wxSoundWave::CanRead()
  54 {
  55   wxUint32 len, signature1, signature2;
  56   m_snderror = wxSOUND_NOERR;
  57
  58   FAIL_WITH(m_input->Read(&signature1, 4).LastRead() != 4, wxSOUND_INVSTRM);
  59
  60   if (wxUINT32_SWAP_ON_BE(signature1) != RIFF_SIGNATURE) {
  61     m_input->Ungetch(&signature1, 4);
  62     return FALSE;
  63   }
  64
  65   m_input->Read(&len, 4);
  66   FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
  67
  68   FAIL_WITH(m_input->Read(&signature2, 4).LastRead() != 4, wxSOUND_INVSTRM);
  69   m_input->Ungetch(&signature2, 4);
  70   m_input->Ungetch(&len, 4);
  71   m_input->Ungetch(&signature1, 4);
  72
  73   if (wxUINT32_SWAP_ON_BE(signature2) != WAVE_SIGNATURE)
  74     return FALSE;
  75
  76   return TRUE;
  77 }
  78
  79 bool wxSoundWave::HandleOutputPCM(wxDataInputStream& data, wxUint16 channels,
  80                             wxUint32 sample_fq, wxUint32 byte_p_sec,
  81                             wxUint16 byte_p_spl, wxUint16 bits_p_spl)
  82 {
  83   wxSoundFormatPcm sndformat;
  84
  85   sndformat.SetSampleRate(sample_fq);
  86   sndformat.SetBPS(bits_p_spl);
  87   sndformat.SetChannels(channels);
  88   sndformat.Signed(TRUE);
  89   sndformat.SetOrder(wxLITTLE_ENDIAN);
  90
  91   if (!SetSoundFormat(sndformat))
  92     return FALSE;
  93
  94   return TRUE;
  95 }
  96
  97 bool wxSoundWave::HandleOutputG721(wxDataInputStream& data, wxUint16 channels,
  98                              wxUint32 sample_fq, wxUint32 byte_p_sec,
  99                              wxUint16 byte_p_spl, wxUint16 bits_p_spl)
 100 {
 101   wxSoundFormatG72X sndformat;
 102
 103   sndformat.SetSampleRate(sample_fq);
 104   sndformat.SetG72XType(wxSOUND_G721);
 105
 106   if (!SetSoundFormat(sndformat))
 107     return FALSE;
 108
 109   return TRUE;
 110 }
 111
 112 bool wxSoundWave::PrepareToPlay()
 113 {
 114   wxUint32 signature, len;
 115   bool end_headers;
 116
 117   if (!m_input) {
 118     m_snderror = wxSOUND_INVSTRM;
 119     return FALSE;
 120   }
 121
 122   wxDataInputStream data(*m_input);
 123   data.BigEndianOrdered(FALSE);
 124
 125   FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 126   FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != RIFF_SIGNATURE, wxSOUND_INVSTRM);
 127      // "RIFF"
 128
 129   len = data.Read32();
 130   FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
 131     // dummy len
 132
 133   FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 134   FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != WAVE_SIGNATURE, wxSOUND_INVSTRM);
 135      // "WAVE"
 136
 137   end_headers = FALSE;
 138   while (!end_headers) {
 139     FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 140
 141     len = data.Read32();
 142     FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
 143
 144     switch (wxUINT32_SWAP_ON_BE(signature)) {
 145     case FMT_SIGNATURE: {  // "fmt "
 146       wxUint16 format, channels, byte_p_spl, bits_p_spl;
 147       wxUint32 sample_fq, byte_p_sec;
 148
 149       data >> format >> channels >> sample_fq
 150            >> byte_p_sec >> byte_p_spl >> bits_p_spl;
 151
 152       switch (format) {
 153       case 0x01:
 154         if (!HandleOutputPCM(data, channels, sample_fq,
 155                        byte_p_sec, byte_p_spl, bits_p_spl))
 156           return FALSE;
 157         break;
 158       case 0x40:
 159         if (!HandleOutputG721(data, channels, sample_fq,
 160                         byte_p_sec, byte_p_spl, bits_p_spl))
 161           return FALSE;
 162         break;
 163       default:
 164         m_snderror = wxSOUND_NOCODEC;
 165         return FALSE;
 166       }
 167       break;
 168     }
 169     case DATA_SIGNATURE: // "data"
 170       end_headers = TRUE;
 171       FinishPreparation(len);
 172       break;
 173     default:
 174       m_input->SeekI(len, wxFromCurrent);
 175       break;
 176     }
 177   }
 178   return TRUE;
 179 }
 180
 181 wxSoundFormatBase *wxSoundWave::HandleInputPCM(wxDataOutputStream& data)
 182 {
 183   wxUint16 format, channels, byte_p_spl, bits_p_spl;
 184   wxUint32 sample_fq, byte_p_sec;
 185   wxSoundFormatPcm *pcm;
 186
 187   pcm = (wxSoundFormatPcm *)(m_sndformat->Clone());
 188
 189   // Write block length
 190   data.Write32(16);
 191
 192   sample_fq  = pcm->GetSampleRate();
 193   bits_p_spl = pcm->GetBPS();
 194   channels   = pcm->GetChannels();
 195   byte_p_spl = pcm->GetBPS() / 8;
 196   byte_p_sec = pcm->GetBytesFromTime(1);
 197   format     = 0x01;
 198
 199   pcm->Signed(TRUE);
 200   pcm->SetOrder(wxLITTLE_ENDIAN);
 201
 202   data << format << channels << sample_fq
 203        << byte_p_sec << byte_p_spl << bits_p_spl;
 204
 205   return pcm;
 206 }
 207
 208 wxSoundFormatBase *wxSoundWave::HandleInputG72X(wxDataOutputStream& data)
 209 {
 210   wxUint16 format, channels, byte_p_spl, bits_p_spl;
 211   wxUint32 sample_fq, byte_p_sec;
 212   wxSoundFormatG72X *g72x;
 213
 214   // Write block length
 215   data.Write32(16);
 216
 217   g72x = (wxSoundFormatG72X *)(m_sndformat->Clone());
 218   if (g72x->GetG72XType() != wxSOUND_G721) {
 219     delete g72x;
 220     return NULL;
 221   }
 222
 223   sample_fq  = g72x->GetSampleRate();
 224   bits_p_spl = 4;
 225   channels   = 1;
 226   byte_p_spl = 0;
 227   byte_p_sec = g72x->GetBytesFromTime(1);
 228   format     = 0x40;
 229   data << format << channels << sample_fq
 230        << byte_p_sec << byte_p_spl << bits_p_spl;
 231
 232   return g72x;
 233 }
 234
 235 bool wxSoundWave::PrepareToRecord(unsigned long time)
 236 {
 237 #define WRITE_SIGNATURE(s,sig) \
 238 signature = sig; \
 239 signature = wxUINT32_SWAP_ON_BE(signature); \
 240 FAIL_WITH(s->Write(&signature, 4).LastWrite() != 4, wxSOUND_INVSTRM);
 241
 242   wxUint32 signature;
 243   wxMemoryOutputStream fmt_data;
 244
 245   if (!m_output) {
 246     m_snderror = wxSOUND_INVSTRM;
 247     return FALSE;
 248   }
 249
 250   wxDataOutputStream data(*m_output);
 251   wxDataOutputStream fmt_d_data(fmt_data);
 252
 253   data.BigEndianOrdered(FALSE);
 254   fmt_d_data.BigEndianOrdered(FALSE);
 255
 256   WRITE_SIGNATURE(m_output, RIFF_SIGNATURE);
 257
 258   FAIL_WITH(m_output->LastWrite() != 4, wxSOUND_INVSTRM);
 259
 260   WRITE_SIGNATURE((&fmt_data), WAVE_SIGNATURE);
 261
 262   {
 263     wxSoundFormatBase *frmt;
 264
 265     WRITE_SIGNATURE((&fmt_data), FMT_SIGNATURE);
 266
 267     switch (m_sndformat->GetType()) {
 268     case wxSOUND_PCM:
 269       frmt = HandleInputPCM(fmt_d_data);
 270       break;
 271     case wxSOUND_G72X:
 272       frmt = HandleInputG72X(fmt_d_data);
 273       break;
 274     default:
 275       m_snderror = wxSOUND_NOCODEC;
 276       return FALSE;
 277     }
 278
 279     FAIL_WITH(!frmt, wxSOUND_NOCODEC);
 280
 281     if (!SetSoundFormat(*frmt)) {
 282       delete frmt;
 283       return FALSE;
 284     }
 285
 286     delete frmt;
 287   }
 288
 289   data << (fmt_data.GetSize() + m_sndformat->GetBytesFromTime(time));
 290
 291   {
 292     char *out_buf;
 293     out_buf = new char[fmt_data.GetSize()];
 294
 295     fmt_data.CopyTo(out_buf, fmt_data.GetSize());
 296     m_output->Write(out_buf, fmt_data.GetSize());
 297
 298     delete[] out_buf;
 299   }
 300
 301   WRITE_SIGNATURE(m_output, DATA_SIGNATURE);
 302   data.Write32(m_sndformat->GetBytesFromTime(time));
 303   return TRUE;
 304 }
 305
 306 bool wxSoundWave::FinishRecording()
 307 {
 308   if (m_output->SeekO(0, wxFromStart) == wxInvalidOffset)
 309     // We can't but there is no error.
 310     return TRUE;
 311
 312   if (m_bytes_left == 0)
 313     return TRUE;
 314
 315   // TODO: Update headers when we stop before the specified time (if possible)
 316   return TRUE;
 317 }
 318
 319 wxUint32 wxSoundWave::GetData(void *buffer, wxUint32 len)
 320 {
 321   return m_input->Read(buffer, len).LastRead();
 322 }
 323
 324 wxUint32 wxSoundWave::PutData(const void *buffer, wxUint32 len)
 325 {
 326   return m_output->Write(buffer, len).LastWrite();
 327 }