contrib/src/mmedia/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 #ifndef WX_PRECOMP
  15     #include "wx/defs.h"
  16 #endif
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #include "wx/stream.h"
  23 #include "wx/datstrm.h"
  24 #include "wx/filefn.h"
  25 #include "wx/mstream.h"
  26
  27 #include "wx/mmedia/sndbase.h"
  28 #include "wx/mmedia/sndcodec.h"
  29 #include "wx/mmedia/sndfile.h"
  30 #include "wx/mmedia/sndpcm.h"
  31 #include "wx/mmedia/sndg72x.h"
  32 #include "wx/mmedia/sndmsad.h"
  33 #include "wx/mmedia/sndwav.h"
  34
  35 #define BUILD_SIGNATURE(a,b,c,d) (((wxUint32)a) | (((wxUint32)b) << 8) | (((wxUint32)c) << 16)  | (((wxUint32)d) << 24))
  36
  37 #define RIFF_SIGNATURE BUILD_SIGNATURE('R','I','F','F')
  38 #define WAVE_SIGNATURE BUILD_SIGNATURE('W','A','V','E')
  39 #define FMT_SIGNATURE BUILD_SIGNATURE('f','m','t',' ')
  40 #define DATA_SIGNATURE BUILD_SIGNATURE('d','a','t','a')
  41
  42 #define HEADER_SIZE 4+4 + 4+4+16 + 4+4
  43 // 4+4 => NAME + LEN
  44 // 16 => fmt size
  45
  46 wxSoundWave::wxSoundWave(wxInputStream& stream, wxSoundStream& io_sound)
  47         : wxSoundFileStream(stream, io_sound)
  48 {
  49     m_base_offset = wxInvalidOffset;
  50 }
  51
  52 wxSoundWave::wxSoundWave(wxOutputStream& stream, wxSoundStream& io_sound)
  53         : wxSoundFileStream(stream, io_sound)
  54 {
  55     m_base_offset = wxInvalidOffset;
  56 }
  57
  58 wxSoundWave::~wxSoundWave()
  59 {
  60 }
  61
  62 wxString wxSoundWave::GetCodecName() const
  63 {
  64     return wxString(wxT("wxSoundWave codec"));
  65 }
  66
  67 #define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
  68
  69 bool wxSoundWave::CanRead()
  70 {
  71     wxUint32 len, signature1, signature2;
  72     m_snderror = wxSOUND_NOERROR;
  73
  74     // Test the main signatures:
  75     //   "RIFF"
  76     FAIL_WITH(m_input->Read(&signature1, 4).LastRead() != 4, wxSOUND_INVSTRM);
  77
  78     if (wxUINT32_SWAP_ON_BE(signature1) != RIFF_SIGNATURE) {
  79         m_input->Ungetch(&signature1, 4);
  80         return FALSE;
  81     }
  82
  83     // Pass the global length
  84     m_input->Read(&len, 4);
  85     FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
  86
  87     // Get the second signature
  88     FAIL_WITH(m_input->Read(&signature2, 4).LastRead() != 4, wxSOUND_INVSTRM);
  89     // Ungetch all
  90     m_input->Ungetch(&signature2, 4);
  91     m_input->Ungetch(&len, 4);
  92     m_input->Ungetch(&signature1, 4);
  93
  94     // Test the second signature
  95     if (wxUINT32_SWAP_ON_BE(signature2) != WAVE_SIGNATURE)
  96         return FALSE;
  97
  98     return TRUE;
  99 }
 100
 101 bool wxSoundWave::HandleOutputPCM(wxDataInputStream& data, wxUint32 len,
 102                                   wxUint16 channels,
 103                                   wxUint32 sample_fq, wxUint32 byte_p_sec,
 104                                   wxUint16 byte_p_spl, wxUint16 bits_p_spl)
 105 {
 106     wxSoundFormatPcm sndformat;
 107
 108     sndformat.SetSampleRate(sample_fq);
 109     sndformat.SetBPS(bits_p_spl);
 110     sndformat.SetChannels(channels);
 111     sndformat.Signed(TRUE);
 112     sndformat.SetOrder(wxLITTLE_ENDIAN);
 113
 114     if (!SetSoundFormat(sndformat))
 115         return FALSE;
 116
 117     m_input->SeekI(len, wxFromCurrent);
 118
 119     return TRUE;
 120 }
 121
 122 bool wxSoundWave::HandleOutputMSADPCM(wxDataInputStream& data, wxUint32 len,
 123                                       wxUint16 channels,
 124                                       wxUint32 sample_fq, wxUint32 byte_p_sec,
 125                                       wxUint16 byte_p_spl, wxUint16 bits_p_spl)
 126 {
 127     wxSoundFormatMSAdpcm sndformat;
 128     wxInt16 *coefs[2];
 129     wxUint16 coefs_len, i;
 130     wxUint16 block_size;
 131
 132     sndformat.SetSampleRate(sample_fq);
 133     sndformat.SetChannels(channels);
 134
 135     block_size = data.Read16();
 136     coefs_len = data.Read16();
 137
 138     coefs[0] = new wxInt16[coefs_len];
 139     coefs[1] = new wxInt16[coefs_len];
 140
 141     for (i=0;i<coefs_len;i++) {
 142         coefs[0][i] = data.Read16();
 143         coefs[1][i] = data.Read16();
 144     }
 145
 146     sndformat.SetCoefs(coefs, 2, coefs_len);
 147     sndformat.SetBlockSize(block_size);
 148
 149     delete[] coefs[0];
 150     delete[] coefs[1];
 151
 152     if (!SetSoundFormat(sndformat))
 153         return FALSE;
 154
 155     len -= coefs_len*4 + 4;
 156
 157     m_input->SeekI(len, wxFromCurrent);
 158
 159     return TRUE;
 160 }
 161
 162 bool wxSoundWave::HandleOutputG721(wxDataInputStream& data, wxUint32 len,
 163                                    wxUint16 channels,
 164                                    wxUint32 sample_fq, wxUint32 byte_p_sec,
 165                                    wxUint16 byte_p_spl, wxUint16 bits_p_spl)
 166 {
 167     wxSoundFormatG72X sndformat;
 168
 169     sndformat.SetSampleRate(sample_fq);
 170     sndformat.SetG72XType(wxSOUND_G721);
 171
 172     if (!SetSoundFormat(sndformat))
 173         return FALSE;
 174
 175     m_input->SeekI(len, wxFromCurrent);
 176
 177     return TRUE;
 178 }
 179
 180 bool wxSoundWave::PrepareToPlay()
 181 {
 182     wxUint32 signature, len;
 183     bool end_headers;
 184
 185     if (!m_input) {
 186         m_snderror = wxSOUND_INVSTRM;
 187         return FALSE;
 188     }
 189
 190     wxDataInputStream data(*m_input);
 191     data.BigEndianOrdered(FALSE);
 192
 193     // Get the first signature
 194     FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 195     FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != RIFF_SIGNATURE, wxSOUND_INVSTRM);
 196     // "RIFF"
 197
 198     len = data.Read32();
 199     FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
 200     // dummy len
 201
 202     // Get the second signature
 203     FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 204     FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != WAVE_SIGNATURE, wxSOUND_INVSTRM);
 205     // "WAVE"
 206
 207     end_headers = FALSE;
 208     // Chunk loop
 209     while (!end_headers) {
 210         FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 211
 212         len = data.Read32();
 213         FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
 214
 215         switch (wxUINT32_SWAP_ON_BE(signature)) {
 216             case FMT_SIGNATURE: {  // "fmt "
 217                 wxUint16 format, channels, byte_p_spl, bits_p_spl;
 218                 wxUint32 sample_fq, byte_p_sec;
 219
 220                 // Get the common parameters
 221                 data >> format >> channels >> sample_fq
 222                      >> byte_p_sec >> byte_p_spl >> bits_p_spl;
 223                 len -= 16;
 224
 225                 switch (format) {
 226                     case 0x01: // PCM
 227                         if (!HandleOutputPCM(data, len, channels, sample_fq,
 228                                              byte_p_sec, byte_p_spl,
 229                                              bits_p_spl))
 230                             return FALSE;
 231                         break;
 232                     case 0x02: // MS ADPCM
 233                         if (!HandleOutputMSADPCM(data, len,
 234                                                  channels, sample_fq,
 235                                                  byte_p_sec, byte_p_spl,
 236                                                  bits_p_spl))
 237                             return FALSE;
 238                         break;
 239                     case 0x40: // G721
 240                         if (!HandleOutputG721(data, len,
 241                                               channels, sample_fq,
 242                                               byte_p_sec, byte_p_spl,
 243                                               bits_p_spl))
 244                             return FALSE;
 245                         break;
 246                     default:
 247                         m_snderror = wxSOUND_NOCODEC;
 248                         return FALSE;
 249                 }
 250                 break;
 251             }
 252             case DATA_SIGNATURE: // "data"
 253                 m_base_offset = m_input->TellI();
 254                 end_headers = TRUE;
 255                 FinishPreparation(len);
 256                 break;
 257             default:
 258                 // We pass the chunk
 259                 m_input->SeekI(len, wxFromCurrent);
 260                 break;
 261         }
 262     }
 263     return TRUE;
 264 }
 265
 266 wxSoundFormatBase *wxSoundWave::HandleInputPCM(wxDataOutputStream& data)
 267 {
 268     wxUint16 format, channels, byte_p_spl, bits_p_spl;
 269     wxUint32 sample_fq, byte_p_sec;
 270     wxSoundFormatPcm *pcm;
 271
 272     pcm = (wxSoundFormatPcm *)(m_sndformat->Clone());
 273
 274     // Write block length
 275     data.Write32(16);
 276
 277     sample_fq  = pcm->GetSampleRate();
 278     bits_p_spl = pcm->GetBPS();
 279     channels   = pcm->GetChannels();
 280     byte_p_spl = pcm->GetBPS() / 8;
 281     byte_p_sec = pcm->GetBytesFromTime(1);
 282     format     = 0x01;
 283
 284     pcm->Signed(TRUE);
 285     pcm->SetOrder(wxLITTLE_ENDIAN);
 286
 287     data << format << channels << sample_fq
 288          << byte_p_sec << byte_p_spl << bits_p_spl;
 289
 290     return pcm;
 291 }
 292
 293 wxSoundFormatBase *wxSoundWave::HandleInputG72X(wxDataOutputStream& data)
 294 {
 295     wxUint16 format, channels, byte_p_spl, bits_p_spl;
 296     wxUint32 sample_fq, byte_p_sec;
 297     wxSoundFormatG72X *g72x;
 298
 299     // Write block length
 300     data.Write32(16);
 301
 302     g72x = (wxSoundFormatG72X *)(m_sndformat->Clone());
 303     if (g72x->GetG72XType() != wxSOUND_G721) {
 304         delete g72x;
 305         return NULL;
 306     }
 307
 308     sample_fq  = g72x->GetSampleRate();
 309     bits_p_spl = 4;
 310     channels   = 1;
 311     byte_p_spl = 0;
 312     byte_p_sec = g72x->GetBytesFromTime(1);
 313     format     = 0x40;
 314     data << format << channels << sample_fq
 315          << byte_p_sec << byte_p_spl << bits_p_spl;
 316
 317     return g72x;
 318 }
 319
 320 bool wxSoundWave::PrepareToRecord(wxUint32 time)
 321 {
 322 #define WRITE_SIGNATURE(s,sig) \
 323 signature = sig; \
 324 signature = wxUINT32_SWAP_ON_BE(signature); \
 325 FAIL_WITH(s->Write(&signature, 4).LastWrite() != 4, wxSOUND_INVSTRM);
 326
 327     wxUint32 signature;
 328     wxMemoryOutputStream fmt_data;
 329
 330     if (!m_output) {
 331         m_snderror = wxSOUND_INVSTRM;
 332         return FALSE;
 333     }
 334
 335     wxDataOutputStream data(*m_output);
 336     wxDataOutputStream fmt_d_data(fmt_data);
 337
 338     data.BigEndianOrdered(FALSE);
 339     fmt_d_data.BigEndianOrdered(FALSE);
 340
 341     WRITE_SIGNATURE(m_output, RIFF_SIGNATURE);
 342
 343     FAIL_WITH(m_output->LastWrite() != 4, wxSOUND_INVSTRM);
 344
 345     WRITE_SIGNATURE((&fmt_data), WAVE_SIGNATURE);
 346
 347     {
 348         wxSoundFormatBase *frmt;
 349
 350         WRITE_SIGNATURE((&fmt_data), FMT_SIGNATURE);
 351
 352         switch (m_sndformat->GetType()) {
 353             case wxSOUND_PCM:
 354                 frmt = HandleInputPCM(fmt_d_data);
 355                 break;
 356             case wxSOUND_G72X:
 357                 frmt = HandleInputG72X(fmt_d_data);
 358                 break;
 359             default:
 360                 m_snderror = wxSOUND_NOCODEC;
 361                 return FALSE;
 362         }
 363
 364         FAIL_WITH(!frmt, wxSOUND_NOCODEC);
 365
 366         if (!SetSoundFormat(*frmt)) {
 367             delete frmt;
 368             return FALSE;
 369         }
 370
 371         delete frmt;
 372     }
 373
 374     data << (fmt_data.GetSize() + m_sndformat->GetBytesFromTime(time));
 375
 376     // We, finally, copy the header block to the output stream
 377     {
 378         char *out_buf;
 379         out_buf = new char[fmt_data.GetSize()];
 380
 381         fmt_data.CopyTo(out_buf, fmt_data.GetSize());
 382         m_output->Write(out_buf, fmt_data.GetSize());
 383
 384         delete[] out_buf;
 385     }
 386
 387     WRITE_SIGNATURE(m_output, DATA_SIGNATURE);
 388     data.Write32(m_sndformat->GetBytesFromTime(time));
 389     return TRUE;
 390 }
 391
 392 bool wxSoundWave::FinishRecording()
 393 {
 394     if (m_output->SeekO(0, wxFromStart) == wxInvalidOffset)
 395         // We can't but there is no error.
 396         return TRUE;
 397
 398     if (m_bytes_left == 0)
 399         return TRUE;
 400
 401     // TODO: Update headers when we stop before the specified time (if possible)
 402     return TRUE;
 403 }
 404
 405 bool wxSoundWave::RepositionStream(wxUint32 position)
 406 {
 407     if (m_base_offset == wxInvalidOffset)
 408         return FALSE;
 409     m_input->SeekI(m_base_offset, wxFromStart);
 410     return TRUE;
 411 }
 412
 413 wxUint32 wxSoundWave::GetData(void *buffer, wxUint32 len)
 414 {
 415     return m_input->Read(buffer, len).LastRead();
 416 }
 417
 418 wxUint32 wxSoundWave::PutData(const void *buffer, wxUint32 len)
 419 {
 420     return m_output->Write(buffer, len).LastWrite();
 421 }