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/* Windows Helpers for Writing Windows Audio Objects.
*
* Copyright (C) 2016 Reece H. Dunn
*
* This file is part of pcaudiolib.
*
* pcaudiolib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* pcaudiolib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with pcaudiolib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "audio_priv.h"
#include <mmreg.h>
LPWSTR
str2wcs(const char *str)
{
size_t len = strlen(str);
LPWSTR ret = calloc(len + 1, sizeof(wchar_t));
if (!ret)
return NULL;
mbstowcs(ret, str, len + 1);
return ret;
}
static HRESULT
CreateWaveFormatEx(WORD format,
uint32_t bits_per_sample,
uint32_t rate,
uint8_t channels,
WAVEFORMATEX **wfmt)
{
(*wfmt) = CoTaskMemAlloc(sizeof(WAVEFORMATEX));
if (!(*wfmt))
return E_OUTOFMEMORY;
(*wfmt)->wFormatTag = format;
(*wfmt)->nChannels = channels;
(*wfmt)->nBlockAlign = (channels * bits_per_sample) / 8;
(*wfmt)->nSamplesPerSec = rate;
(*wfmt)->wBitsPerSample = bits_per_sample;
(*wfmt)->nAvgBytesPerSec = rate * (*wfmt)->nBlockAlign;
(*wfmt)->cbSize = 0;
return S_OK;
}
HRESULT
CreateWaveFormat(enum audio_object_format format,
uint32_t rate,
uint8_t channels,
WAVEFORMATEX **wfmt)
{
if (!wfmt)
return E_INVALIDARG;
switch (format)
{
case AUDIO_OBJECT_FORMAT_ALAW: return CreateWaveFormatEx(WAVE_FORMAT_ALAW, 8, rate, channels, wfmt);
case AUDIO_OBJECT_FORMAT_ULAW: return CreateWaveFormatEx(WAVE_FORMAT_MULAW, 8, rate, channels, wfmt);
case AUDIO_OBJECT_FORMAT_S8: return CreateWaveFormatEx(WAVE_FORMAT_PCM, 8, rate, channels, wfmt);
case AUDIO_OBJECT_FORMAT_S16LE: return CreateWaveFormatEx(WAVE_FORMAT_PCM, 16, rate, channels, wfmt);
case AUDIO_OBJECT_FORMAT_S32LE: return CreateWaveFormatEx(WAVE_FORMAT_PCM, 32, rate, channels, wfmt);
case AUDIO_OBJECT_FORMAT_FLOAT32LE: return CreateWaveFormatEx(WAVE_FORMAT_IEEE_FLOAT, 32, rate, channels, wfmt);
case AUDIO_OBJECT_FORMAT_FLOAT64LE: return CreateWaveFormatEx(WAVE_FORMAT_IEEE_FLOAT, 64, rate, channels, wfmt);
default: return E_INVALIDARG;
}
}
const char *
windows_hresult_strerror(struct audio_object *object,
int error)
{
char *msg = NULL;
DWORD result = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), &msg, 256, NULL);
if (!result)
return NULL;
size_t len = strlen(msg);
while (len > 1 && msg[len - 1] == '\n' || msg[len - 1] == '\r')
msg[--len] = 0;
char *ret = strdup(msg);
LocalFree(msg);
return ret;
}
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