ref: c4711e4e11b0672e2b6466ae5df2209938d7aca3
dir: /tools/wave_out.c/
/* Copyright (c) 2002, John Edwards Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of the Xiph.org Foundation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif /* Set TABS = 4 */ /******************************************************************** function: To provide playback of 16 bit PCM wave data in Win32 environments from decoded compressed files. ********************************************************************/ #if defined WIN32 || defined _WIN32 #include <string.h> #include <errno.h> #include "wave_out.h" #define MAXWAVESIZE 4294967040LU #define MAX_WAVEBLOCKS 32 // This is modified for USE_WIN_AUDIO - ONLY 2002-02-27 static CRITICAL_SECTION cs; static HWAVEOUT dev = NULL; static int ScheduledBlocks = 0; static int PlayedWaveHeadersCount = 0; // free index static WAVEHDR* PlayedWaveHeaders [MAX_WAVEBLOCKS]; static int Box ( const char* msg ) { MessageBox ( NULL, msg, " "VERSION_STRING": Error Message . . .", MB_OK | MB_ICONEXCLAMATION ); return -1; } /* * This function registers already played WAVE chunks. Freeing is done by free_memory(), */ static void CALLBACK wave_callback ( HWAVE hWave, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 ) { if ( uMsg == WOM_DONE ) { EnterCriticalSection ( &cs ); PlayedWaveHeaders [PlayedWaveHeadersCount++] = (WAVEHDR*) dwParam1; LeaveCriticalSection ( &cs ); } } static void free_memory ( void ) { WAVEHDR* wh; HGLOBAL hg; EnterCriticalSection ( &cs ); wh = PlayedWaveHeaders [--PlayedWaveHeadersCount]; ScheduledBlocks--; // decrease the number of USED blocks LeaveCriticalSection ( &cs ); waveOutUnprepareHeader ( dev, wh, sizeof (WAVEHDR) ); hg = GlobalHandle ( wh -> lpData ); // Deallocate the buffer memory GlobalUnlock (hg); GlobalFree (hg); hg = GlobalHandle ( wh ); // Deallocate the header memory GlobalUnlock (hg); GlobalFree (hg); } Int Set_WIN_Params ( FILE_T dummyFile , Ldouble SampleFreq, Uint BitsPerSample, Uint Channels ) { WAVEFORMATEX outFormat; UINT deviceID = WAVE_MAPPER; (void) dummyFile; if ( waveOutGetNumDevs () == 0 ) return Box ( "No audio device present." ); outFormat.wFormatTag = WAVE_FORMAT_PCM; outFormat.wBitsPerSample = BitsPerSample; outFormat.nChannels = Channels; outFormat.nSamplesPerSec = (unsigned long)(SampleFreq + 0.5); outFormat.nBlockAlign = (outFormat.wBitsPerSample + 7) / 8 * outFormat.nChannels; outFormat.nAvgBytesPerSec = outFormat.nSamplesPerSec * outFormat.nBlockAlign; switch ( waveOutOpen ( &dev, deviceID, &outFormat, (DWORD)wave_callback, 0, CALLBACK_FUNCTION ) ) { case MMSYSERR_ALLOCATED: return Box ( "Device is already open." ); case MMSYSERR_BADDEVICEID: return Box ( "The specified device is out of range." ); case MMSYSERR_NODRIVER: return Box ( "There is no audio driver in this system." ); case MMSYSERR_NOMEM: return Box ( "Unable to allocate sound memory." ); case WAVERR_BADFORMAT: return Box ( "This audio format is not supported." ); case WAVERR_SYNC: return Box ( "The device is synchronous." ); default: return Box ( "Unknown media error." ); case MMSYSERR_NOERROR: break; } waveOutReset ( dev ); InitializeCriticalSection ( &cs ); SetPriorityClass ( GetCurrentProcess (), HIGH_PRIORITY_CLASS ); return 0; } int WIN_Play_Samples ( const void* data, size_t len ) { HGLOBAL hg; HGLOBAL hg2; LPWAVEHDR wh; void* allocptr; do { while ( PlayedWaveHeadersCount > 0 ) // free used blocks ... free_memory (); if ( ScheduledBlocks < sizeof(PlayedWaveHeaders)/sizeof(*PlayedWaveHeaders) ) // wait for a free block ... break; Sleep (26); } while (1); if ( (hg2 = GlobalAlloc ( GMEM_MOVEABLE, len )) == NULL ) // allocate some memory for a copy of the buffer return Box ( "GlobalAlloc failed." ); allocptr = GlobalLock (hg2); CopyMemory ( allocptr, data, len ); // Here we can call any modification output functions we want.... if ( (hg = GlobalAlloc (GMEM_MOVEABLE | GMEM_ZEROINIT, sizeof (WAVEHDR))) == NULL ) // now make a header and WRITE IT! return -1; wh = GlobalLock (hg); wh -> dwBufferLength = len; wh -> lpData = allocptr; if ( waveOutPrepareHeader ( dev, wh, sizeof (WAVEHDR)) != MMSYSERR_NOERROR ) { GlobalUnlock (hg); GlobalFree (hg); return -1; } if ( waveOutWrite ( dev, wh, sizeof (WAVEHDR)) != MMSYSERR_NOERROR ) { GlobalUnlock (hg); GlobalFree (hg); return -1; } EnterCriticalSection ( &cs ); ScheduledBlocks++; LeaveCriticalSection ( &cs ); return len; } int WIN_Audio_close ( void ) { if ( dev != NULL ) { while ( ScheduledBlocks > 0 ) { Sleep (ScheduledBlocks); while ( PlayedWaveHeadersCount > 0 ) // free used blocks ... free_memory (); } waveOutReset (dev); // reset the device waveOutClose (dev); // close the device dev = NULL; } DeleteCriticalSection ( &cs ); ScheduledBlocks = 0; return 0; } #endif /* end of wave_out.c */