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/* Project nGenEx
Destroyer Studios LLC
Copyright © 1997-2004. All Rights Reserved.
SUBSYSTEM: nGenEx.lib
FILE: MCIWave.cpp
AUTHOR: John DiCamillo
OVERVIEW
========
MCI Wave Output stuff
*/
#include "MemDebug.h"
#include "Types.h"
// +----------------------------------------------------------------------+
void Print(const char* fmt, ...);
// +----------------------------------------------------------------------+
const int MCI_MAX_STR = 128;
static char ret_str[MCI_MAX_STR];
static char err_str[MCI_MAX_STR];
static MCIERROR mci_err;
static MMRESULT wav_err;
extern HWND hwndApp;
static int mci_send_string(const char* cmd_str)
{
mci_err = mciSendString(cmd_str, ret_str, sizeof(ret_str), hwndApp);
if (mci_err) {
if (mciGetErrorString(mci_err, err_str, sizeof(err_str)))
Print("Error (%s): '%s'\n", cmd_str, err_str);
else
Print("Error (%s): %d - UNKNOWN\n", cmd_str, mci_err);
return 0;
}
return 1;
}
// +--------------------------------------------------------------------+
static void print_wav_error()
{
waveOutGetErrorText(wav_err, err_str, MCI_MAX_STR);
Print(err_str);
}
// +--------------------------------------------------------------------+
int load_wave_file(const char* fname, LPWAVEHDR hdr, LPWAVEFORMATEX format)
{
HMMIO hmmio; /* file handle for open file */
MMCKINFO mmckinfoParent; /* parent chunk information structure */
MMCKINFO mmckinfoSubchunk; /* subchunk information structure */
DWORD dwFmtSize; /* size of "fmt" chunk */
DWORD dwDataSize; /* size of "data" chunk */
/*
* Open the given file for reading with buffered I/O
* using the default internal buffer.
*/
hmmio = mmioOpen((LPSTR) fname, NULL, MMIO_READ | MMIO_ALLOCBUF);
if (hmmio == NULL) {
Print("load_wave_file(): '%s' - Failed to open file.\n", fname);
return 0;
}
/*
* Locate a "RIFF" chunk with a "WAVE" form type
* to make sure the file is a WAVE file.
*/
mmckinfoParent.fccType = mmioFOURCC('W', 'A', 'V', 'E');
if (mmioDescend(hmmio, (LPMMCKINFO) &mmckinfoParent, NULL, MMIO_FINDRIFF)) {
Print("load_wave_file(): '%s' - This is not a WAVE file.\n", fname);
mmioClose(hmmio, 0);
return 0;
}
/*
* Find the "fmt " chunk (form type "fmt "); it must be
* a subchunk of the "RIFF" parent chunk.
*/
mmckinfoSubchunk.ckid = mmioFOURCC('f', 'm', 't', ' ');
if (mmioDescend(hmmio, &mmckinfoSubchunk, &mmckinfoParent, MMIO_FINDCHUNK)) {
Print("load_wave_file(): '%s' - WAVE file has no \"fmt\" chunk\n", fname);
mmioClose(hmmio, 0);
return 0;
}
/*
* Get the size of the "fmt " chunk--allocate and lock memory for it.
*/
dwFmtSize = mmckinfoSubchunk.cksize;
/* Read the "fmt " chunk. */
if (mmioRead(hmmio, (HPSTR) format, dwFmtSize) != (LRESULT)dwFmtSize) {
Print("load_wave_file(): '%s' - Failed to read format chunk.\n", fname);
mmioClose(hmmio, 0);
return 0;
}
/* Ascend out of the "fmt " subchunk. */
mmioAscend(hmmio, &mmckinfoSubchunk, 0);
/*
* Find the data subchunk. The current file position
* should be at the beginning of the data chunk.
*/
mmckinfoSubchunk.ckid = mmioFOURCC('d', 'a', 't', 'a');
if (mmioDescend(hmmio, &mmckinfoSubchunk, &mmckinfoParent, MMIO_FINDCHUNK)) {
Print("load_wave_file(): '%s' - WAVE file has no data chunk.\n", fname);
mmioClose(hmmio, 0);
return 0;
}
/* Get the size of the data subchunk. */
dwDataSize = mmckinfoSubchunk.cksize;
if (dwDataSize == 0L) {
Print("load_wave_file(): '%s' - The data chunk contains no data.\n", fname);
mmioClose(hmmio, 0);
return 0;
}
// allocate the data block:
hdr->lpData = (LPSTR) new(__FILE__,__LINE__) BYTE[dwDataSize];
hdr->dwBufferLength = dwDataSize;
/* Read the waveform data subchunk. */
if (mmioRead(hmmio, (HPSTR) hdr->lpData, dwDataSize) != (LRESULT)dwDataSize) {
Print("load_wave_file(): '%s' - Failed to read data chunk.\n", fname);
mmioClose(hmmio, 0);
return 0;
}
/* Close the file. */
mmioClose(hmmio, 0);
return 1;
}
// +--------------------------------------------------------------------+
void delete_wave_file(LPWAVEHDR hdr, LPWAVEFORMATEX format)
{
if (hdr) {
delete hdr->lpData;
hdr->lpData = 0;
}
}
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