| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wave.cpp |
| 3 | // Purpose: wxWave |
| 4 | // Author: Marcel Rasche |
| 5 | // Modified by: |
| 6 | // Created: 25/10/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows license |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation "wave.h" |
| 14 | #endif |
| 15 | |
| 16 | #include "wx/setup.h" |
| 17 | |
| 18 | #if wxUSE_WAVE |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #if defined(__BORLANDC__) |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <unistd.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <sys/ioctl.h> |
| 31 | #include <linux/soundcard.h> |
| 32 | |
| 33 | #ifndef WX_PRECOMP |
| 34 | #include "wx/wx.h" |
| 35 | #endif |
| 36 | |
| 37 | #include "wx/file.h" |
| 38 | #include "wx/wave.h" |
| 39 | |
| 40 | //----------------------------------------------------------------- |
| 41 | // wxWave |
| 42 | //----------------------------------------------------------------- |
| 43 | |
| 44 | wxWave::wxWave() |
| 45 | : m_waveData(NULL), m_waveLength(0), m_isResource(FALSE) |
| 46 | { |
| 47 | } |
| 48 | |
| 49 | wxWave::wxWave(const wxString& sFileName, bool isResource) |
| 50 | : m_waveData(NULL), m_waveLength(0), m_isResource(isResource) |
| 51 | { |
| 52 | Create(sFileName, isResource); |
| 53 | } |
| 54 | |
| 55 | wxWave::wxWave(int size, const wxByte* data) |
| 56 | : m_waveData(NULL), m_waveLength(0), m_isResource(FALSE) |
| 57 | { |
| 58 | Create(size, data); |
| 59 | } |
| 60 | |
| 61 | wxWave::~wxWave() |
| 62 | { |
| 63 | Free(); |
| 64 | } |
| 65 | |
| 66 | bool wxWave::Create(const wxString& fileName, bool isResource) |
| 67 | { |
| 68 | Free(); |
| 69 | |
| 70 | if (isResource) |
| 71 | { |
| 72 | // todo |
| 73 | return (m_waveData ? TRUE : FALSE); |
| 74 | } |
| 75 | else |
| 76 | { |
| 77 | m_isResource = FALSE; |
| 78 | |
| 79 | wxFile fileWave; |
| 80 | if (!fileWave.Open(fileName, wxFile::read)) |
| 81 | { |
| 82 | return FALSE; |
| 83 | } |
| 84 | |
| 85 | m_waveLength = (int) fileWave.Length(); |
| 86 | |
| 87 | m_waveData = new wxByte[m_waveLength]; |
| 88 | if (!m_waveData) |
| 89 | { |
| 90 | return FALSE; |
| 91 | } |
| 92 | |
| 93 | fileWave.Read(m_waveData, m_waveLength); |
| 94 | |
| 95 | return TRUE; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | bool wxWave::Create(int size, const wxByte* data) |
| 100 | { |
| 101 | Free(); |
| 102 | m_isResource = FALSE; |
| 103 | m_waveLength=size; |
| 104 | m_waveData = new wxByte[size]; |
| 105 | if (!m_waveData) |
| 106 | { |
| 107 | return FALSE; |
| 108 | } |
| 109 | |
| 110 | for (int i=0; i<size; i++) m_waveData[i] = data[i]; |
| 111 | |
| 112 | return TRUE; |
| 113 | } |
| 114 | |
| 115 | bool wxWave::Play(bool async, bool looped) |
| 116 | { |
| 117 | if (!IsOk()) return FALSE; |
| 118 | |
| 119 | int dev = OpenDSP(); |
| 120 | |
| 121 | if (dev<0) return FALSE; |
| 122 | |
| 123 | ioctl(dev,SNDCTL_DSP_SYNC,0); |
| 124 | |
| 125 | bool play=TRUE; |
| 126 | int i,l=0; |
| 127 | do |
| 128 | { |
| 129 | i= (int)((l+m_DSPblkSize) < m_sizeData ? m_DSPblkSize : (m_sizeData-l)); |
| 130 | if ( write(dev,&m_data[l],i) != i ) |
| 131 | { |
| 132 | play=FALSE; |
| 133 | } |
| 134 | l +=i; |
| 135 | } while (play == TRUE && l<m_sizeData); |
| 136 | |
| 137 | close(dev); |
| 138 | return TRUE; |
| 139 | } |
| 140 | |
| 141 | bool wxWave::Free() |
| 142 | { |
| 143 | if (m_waveData) |
| 144 | { |
| 145 | delete[] m_waveData; |
| 146 | m_waveData = NULL; |
| 147 | m_waveLength = 0; |
| 148 | return TRUE; |
| 149 | } |
| 150 | |
| 151 | return FALSE; |
| 152 | } |
| 153 | |
| 154 | typedef struct |
| 155 | { |
| 156 | unsigned long uiSize; |
| 157 | unsigned short uiFormatTag; |
| 158 | unsigned short uiChannels; |
| 159 | unsigned long ulSamplesPerSec; |
| 160 | unsigned long ulAvgBytesPerSec; |
| 161 | unsigned short uiBlockAlign; |
| 162 | unsigned short uiBitsPerSample; |
| 163 | } WAVEFORMAT; |
| 164 | |
| 165 | #define MONO 1 // and stereo is 2 by wav format |
| 166 | #define WAVE_FORMAT_PCM 1 |
| 167 | #define WAVE_INDEX 8 |
| 168 | #define FMT_INDEX 12 |
| 169 | |
| 170 | int wxWave::OpenDSP(void) |
| 171 | { |
| 172 | WAVEFORMAT waveformat; |
| 173 | int dev=-1; |
| 174 | unsigned long ul; |
| 175 | |
| 176 | if (m_waveLength < (int)(32+sizeof(WAVEFORMAT))) |
| 177 | return -1; |
| 178 | |
| 179 | memcpy(&waveformat,&m_waveData[FMT_INDEX+4],sizeof(WAVEFORMAT)); |
| 180 | |
| 181 | if (memcmp(m_waveData, "RIFF", 4) != 0) |
| 182 | return -1; |
| 183 | if (memcmp(&m_waveData[WAVE_INDEX], "WAVE", 4) != 0) |
| 184 | return -1; |
| 185 | if (memcmp(&m_waveData[FMT_INDEX], "fmt ", 4) != 0) |
| 186 | return -1; |
| 187 | if (memcmp(&m_waveData[FMT_INDEX+waveformat.uiSize+8], "data", 4) != 0) |
| 188 | return -1; |
| 189 | memcpy(&ul,&m_waveData[FMT_INDEX+waveformat.uiSize+12],4); |
| 190 | m_sizeData=ul; |
| 191 | if ((int)(m_sizeData+FMT_INDEX+waveformat.uiSize+16) != m_waveLength) |
| 192 | return -1; |
| 193 | m_data=(char *)(&m_waveData[FMT_INDEX+waveformat.uiSize+8]); |
| 194 | |
| 195 | if (waveformat.uiFormatTag != WAVE_FORMAT_PCM) |
| 196 | return -1; |
| 197 | if (waveformat.ulSamplesPerSec != waveformat.ulAvgBytesPerSec/waveformat.uiBlockAlign) |
| 198 | return -1; |
| 199 | |
| 200 | if ((dev = open(AUDIODEV,O_RDWR,0)) <0) |
| 201 | return -1; |
| 202 | |
| 203 | if (!InitDSP(dev,(int)waveformat.uiBitsPerSample,waveformat.uiChannels == MONO ? 0:1,waveformat.ulSamplesPerSec)) |
| 204 | { |
| 205 | close(dev); |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | return dev; |
| 210 | } |
| 211 | |
| 212 | bool wxWave::InitDSP(int dev, int iDataBits, int iChannel,unsigned long ulSamplingRate) |
| 213 | { |
| 214 | if ( ioctl(dev,SNDCTL_DSP_GETBLKSIZE,&m_DSPblkSize) < 0 ) |
| 215 | return FALSE; |
| 216 | if (m_DSPblkSize < 4096 || m_DSPblkSize > 65536) |
| 217 | return FALSE; |
| 218 | if ( ioctl(dev,SNDCTL_DSP_SAMPLESIZE,&iDataBits) < 0 ) |
| 219 | return FALSE; |
| 220 | if ( ioctl(dev,SNDCTL_DSP_STEREO,&iChannel) < 0 ) |
| 221 | return FALSE; |
| 222 | if ( ioctl(dev,SNDCTL_DSP_SPEED,&ulSamplingRate) < 0 ) |
| 223 | return FALSE; |
| 224 | |
| 225 | return TRUE; |
| 226 | } |
| 227 | #endif |
| 228 | |