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
  18 #include "sndbase.h"
  19 #include "sndcodec.h"
  20 #include "sndfile.h"
  21 #include "sndpcm.h"
  22 #include "sndg72x.h"
  23 #include "sndwav.h"
  24
  25 #define BUILD_SIGNATURE(a,b,c,d) (((wxUint32)a) | (((wxUint32)b) << 8) | (((wxUint32)c) << 16)  | (((wxUint32)d) << 24))
  26
  27 #define RIFF_SIGNATURE BUILD_SIGNATURE('R','I','F','F')
  28 #define WAVE_SIGNATURE BUILD_SIGNATURE('W','A','V','E')
  29 #define FMT_SIGNATURE BUILD_SIGNATURE('f','m','t',' ')
  30 #define DATA_SIGNATURE BUILD_SIGNATURE('d','a','t','a')
  31
  32 #define HEADER_SIZE 4+4 + 4+4+16 + 4+4
  33  // 4+4 => NAME + LEN
  34  // 16 => fmt size
  35
  36 wxSoundWave::wxSoundWave(wxInputStream& stream, wxSoundStream& io_sound)
  37   : wxSoundFileStream(stream, io_sound)
  38 {
  39 }
  40
  41 wxSoundWave::wxSoundWave(wxOutputStream& stream, wxSoundStream& io_sound)
  42   : wxSoundFileStream(stream, io_sound)
  43 {
  44 }
  45
  46 wxSoundWave::~wxSoundWave()
  47 {
  48 }
  49
  50 #define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
  51
  52 bool wxSoundWave::CanRead()
  53 {
  54   wxUint32 len, signature;
  55   m_snderror = wxSOUND_NOERR;
  56
  57   FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
  58
  59   if (wxUINT32_SWAP_ON_BE(signature) != RIFF_SIGNATURE) {
  60     m_input->Ungetch(&signature, 4);
  61     return FALSE;
  62   }
  63
  64   m_input->Read(&len, 4);
  65   FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
  66
  67   FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
  68   if (wxUINT32_SWAP_ON_BE(signature) != WAVE_SIGNATURE) {
  69     m_input->Ungetch(&signature, 4);
  70     return FALSE;
  71   }
  72
  73   m_input->Ungetch("RIFF", 4);
  74   m_input->Ungetch(&len, 4);
  75   m_input->Ungetch("WAVE", 4);
  76
  77   return TRUE;
  78 }
  79
  80 bool wxSoundWave::HandlePCM(wxDataInputStream& data, wxUint16 channels,
  81                             wxUint32 sample_fq, wxUint32 byte_p_sec,
  82                             wxUint16 byte_p_spl, wxUint16 bits_p_spl)
  83 {
  84   wxSoundFormatPcm sndformat;
  85
  86   sndformat.SetSampleRate(sample_fq);
  87   sndformat.SetBPS(bits_p_spl);
  88   sndformat.SetChannels(channels);
  89   sndformat.Signed(TRUE);
  90   sndformat.SetOrder(wxLITTLE_ENDIAN);
  91
  92   if (!SetSoundFormat(sndformat))
  93     return FALSE;
  94
  95   return TRUE;
  96 }
  97
  98 bool wxSoundWave::HandleG721(wxDataInputStream& data, wxUint16 channels,
  99                              wxUint32 sample_fq, wxUint32 byte_p_sec,
 100                              wxUint16 byte_p_spl, wxUint16 bits_p_spl)
 101 {
 102   wxSoundFormatG72X sndformat;
 103
 104   sndformat.SetSampleRate(sample_fq);
 105   sndformat.SetG72XType(wxSOUND_G721);
 106
 107   if (!SetSoundFormat(sndformat))
 108     return FALSE;
 109
 110   return TRUE;
 111 }
 112
 113 bool wxSoundWave::PrepareToPlay()
 114 {
 115   wxUint32 signature, len;
 116   bool end_headers;
 117
 118   if (!m_input) {
 119     m_snderror = wxSOUND_INVSTRM;
 120     return FALSE;
 121   }
 122
 123   wxDataInputStream data(*m_input);
 124   data.BigEndianOrdered(FALSE);
 125
 126   FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 127   FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != RIFF_SIGNATURE, wxSOUND_INVSTRM);
 128      // "RIFF"
 129
 130   len = data.Read32();
 131   FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
 132     // dummy len
 133
 134   FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 135   FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != WAVE_SIGNATURE, wxSOUND_INVSTRM);
 136      // "WAVE"
 137
 138   end_headers = FALSE;
 139   while (!end_headers) {
 140     FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
 141
 142     len = data.Read32();
 143     FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
 144
 145     switch (wxUINT32_SWAP_ON_BE(signature)) {
 146     case FMT_SIGNATURE: {  // "fmt "
 147       wxUint16 format, channels, byte_p_spl, bits_p_spl;
 148       wxUint32 sample_fq, byte_p_sec;
 149
 150       data >> format >> channels >> sample_fq
 151            >> byte_p_sec >> byte_p_spl >> bits_p_spl;
 152
 153       switch (format) {
 154       case 0x01:
 155         if (!HandlePCM(data, channels, sample_fq,
 156                        byte_p_sec, byte_p_spl, bits_p_spl))
 157           return FALSE;
 158         break;
 159       case 0x40:
 160         if (!HandleG721(data, channels, sample_fq,
 161                         byte_p_sec, byte_p_spl, bits_p_spl))
 162           return FALSE;
 163         break;
 164       default:
 165         m_snderror = wxSOUND_NOCODEC;
 166         return FALSE;
 167       }
 168       break;
 169     }
 170     case DATA_SIGNATURE: // "data"
 171       end_headers = TRUE;
 172       break;
 173     default:
 174       m_input->SeekI(len, wxFromCurrent);
 175       break;
 176     }
 177   }
 178   return TRUE;
 179 }
 180
 181 bool wxSoundWave::PrepareToRecord(unsigned long time)
 182 {
 183 #define WRITE_SIGNATURE(sig) \
 184 signature = sig; \
 185 signature = wxUINT32_SWAP_ON_BE(signature); \
 186 FAIL_WITH(m_output->Write(&signature, 4).LastWrite() != 4, wxSOUND_INVSTRM);
 187
 188   wxUint32 signature, len;
 189
 190   if (!m_output) {
 191     m_snderror = wxSOUND_INVSTRM;
 192     return FALSE;
 193   }
 194
 195   wxDataOutputStream data(*m_output);
 196   data.BigEndianOrdered(FALSE);
 197
 198   len = m_sndformat->GetBytesFromTime(time);
 199
 200   len += HEADER_SIZE;
 201
 202   WRITE_SIGNATURE(RIFF_SIGNATURE);
 203
 204   data << len;
 205   FAIL_WITH(m_output->LastWrite() != 4, wxSOUND_INVSTRM);
 206
 207   WRITE_SIGNATURE(WAVE_SIGNATURE);
 208
 209   {
 210     wxUint16 format, channels, byte_p_spl, bits_p_spl;
 211     wxUint32 sample_fq, byte_p_sec;
 212     wxSoundFormatPcm *pcm;
 213
 214     if (m_sndformat->GetType() != wxSOUND_PCM) {
 215       m_snderror = wxSOUND_NOCODEC;
 216       return FALSE;
 217     }
 218
 219     pcm = (wxSoundFormatPcm *)(m_sndformat->Clone());
 220
 221     WRITE_SIGNATURE(FMT_SIGNATURE);
 222     data.Write32(16);
 223
 224     sample_fq  = pcm->GetSampleRate();
 225     bits_p_spl = pcm->GetBPS();
 226     channels   = pcm->GetChannels();
 227     byte_p_spl = pcm->GetBPS() / 8;
 228     byte_p_sec = pcm->GetBytesFromTime(1);
 229     format     = 1;
 230     data << format << channels << sample_fq
 231          << byte_p_sec << byte_p_spl << bits_p_spl;
 232
 233     pcm->Signed(TRUE);
 234     pcm->SetOrder(wxLITTLE_ENDIAN);
 235
 236     if (!SetSoundFormat(*pcm))
 237       return FALSE;
 238
 239     delete pcm;
 240   }
 241
 242   WRITE_SIGNATURE(DATA_SIGNATURE);
 243   data.Write32(m_sndformat->GetBytesFromTime(time));
 244   return TRUE;
 245 }
 246
 247 bool wxSoundWave::FinishRecording()
 248 {
 249   // TODO: Update headers when we stop before the specified time (if possible)
 250   return TRUE;
 251 }
 252
 253 wxUint32 wxSoundWave::GetData(void *buffer, wxUint32 len)
 254 {
 255   return m_input->Read(buffer, len).LastRead();
 256 }
 257
 258 wxUint32 wxSoundWave::PutData(const void *buffer, wxUint32 len)
 259 {
 260   return m_output->Write(buffer, len).LastWrite();
 261 }