diff options
Diffstat (limited to 'faad2/src/aacDECdrop/wave_out.c')
| -rw-r--r-- | faad2/src/aacDECdrop/wave_out.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/faad2/src/aacDECdrop/wave_out.c b/faad2/src/aacDECdrop/wave_out.c new file mode 100644 index 0000000..02131ab --- /dev/null +++ b/faad2/src/aacDECdrop/wave_out.c @@ -0,0 +1,190 @@ +/*
+ * function: Support for playing wave files - Win32 - ONLY
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright (C) 2002 John Edwards
+ */
+
+#include <string.h>
+#include <errno.h>
+#include "wave_out.h"
+
+#define MAX_WAVEBLOCKS 32
+
+
+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, "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);
+ outFormat.nBlockAlign = outFormat.nChannels * outFormat.wBitsPerSample/8;
+ outFormat.nAvgBytesPerSec = outFormat.nSamplesPerSec * outFormat.nChannels * outFormat.wBitsPerSample/8;
+
+ 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 );
+// SetPriorityClass ( GetCurrentProcess (), REALTIME_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;
+}
+
+
+/******************************** end of wave_out.c ********************************/
+
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