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/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Video Redirection Virtual Channel - OSS Audio Device
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*
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* Copyright (c) 2015 Rozhuk Ivan <rozhuk.im@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <winpr/crt.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <limits.h>
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#include <unistd.h>
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#if defined(__OpenBSD__)
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#include <soundcard.h>
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#else
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#include <sys/soundcard.h>
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#endif
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#include <sys/ioctl.h>
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#include <freerdp/types.h>
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#include <freerdp/codec/dsp.h>
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#include "tsmf_audio.h"
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typedef struct _TSMFOSSAudioDevice
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{
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ITSMFAudioDevice iface;
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char dev_name[PATH_MAX];
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int pcm_handle;
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UINT32 sample_rate;
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UINT32 channels;
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UINT32 bits_per_sample;
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UINT32 data_size_last;
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} TSMFOssAudioDevice;
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#define OSS_LOG_ERR(_text, _error) \
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if (_error != 0) \
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WLog_ERR(TAG, "%s: %i - %s", _text, _error, strerror(_error));
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static BOOL tsmf_oss_open(ITSMFAudioDevice* audio, const char* device)
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{
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int tmp;
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TSMFOssAudioDevice* oss = (TSMFOssAudioDevice*)audio;
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if (oss == NULL || oss->pcm_handle != -1)
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return FALSE;
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if (device == NULL) /* Default device. */
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{
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strncpy(oss->dev_name, "/dev/dsp", sizeof(oss->dev_name));
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}
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else
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{
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strncpy(oss->dev_name, device, sizeof(oss->dev_name) - 1);
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}
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if ((oss->pcm_handle = open(oss->dev_name, O_WRONLY)) < 0)
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{
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OSS_LOG_ERR("sound dev open failed", errno);
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oss->pcm_handle = -1;
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return FALSE;
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}
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#if 0 /* FreeBSD OSS implementation at this moment (2015.03) does not set PCM_CAP_OUTPUT flag. */
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tmp = 0;
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if (ioctl(oss->pcm_handle, SNDCTL_DSP_GETCAPS, &mask) == -1)
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{
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OSS_LOG_ERR("SNDCTL_DSP_GETCAPS failed, try ignory", errno);
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}
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else if ((mask & PCM_CAP_OUTPUT) == 0)
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{
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OSS_LOG_ERR("Device does not supports playback", EOPNOTSUPP);
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close(oss->pcm_handle);
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oss->pcm_handle = -1;
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return FALSE;
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}
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#endif
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tmp = 0;
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if (ioctl(oss->pcm_handle, SNDCTL_DSP_GETFMTS, &tmp) == -1)
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{
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OSS_LOG_ERR("SNDCTL_DSP_GETFMTS failed", errno);
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close(oss->pcm_handle);
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oss->pcm_handle = -1;
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return FALSE;
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}
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if ((AFMT_S16_LE & tmp) == 0)
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{
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OSS_LOG_ERR("SNDCTL_DSP_GETFMTS - AFMT_S16_LE", EOPNOTSUPP);
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close(oss->pcm_handle);
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oss->pcm_handle = -1;
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return FALSE;
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}
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WLog_INFO(TAG, "open: %s", oss->dev_name);
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return TRUE;
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}
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static BOOL tsmf_oss_set_format(ITSMFAudioDevice* audio, UINT32 sample_rate, UINT32 channels,
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UINT32 bits_per_sample)
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{
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int tmp;
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TSMFOssAudioDevice* oss = (TSMFOssAudioDevice*)audio;
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if (oss == NULL || oss->pcm_handle == -1)
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return FALSE;
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oss->sample_rate = sample_rate;
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oss->channels = channels;
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oss->bits_per_sample = bits_per_sample;
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tmp = AFMT_S16_LE;
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if (ioctl(oss->pcm_handle, SNDCTL_DSP_SETFMT, &tmp) == -1)
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OSS_LOG_ERR("SNDCTL_DSP_SETFMT failed", errno);
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tmp = channels;
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if (ioctl(oss->pcm_handle, SNDCTL_DSP_CHANNELS, &tmp) == -1)
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OSS_LOG_ERR("SNDCTL_DSP_CHANNELS failed", errno);
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tmp = sample_rate;
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if (ioctl(oss->pcm_handle, SNDCTL_DSP_SPEED, &tmp) == -1)
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OSS_LOG_ERR("SNDCTL_DSP_SPEED failed", errno);
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tmp = ((bits_per_sample / 8) * channels * sample_rate);
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if (ioctl(oss->pcm_handle, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)
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OSS_LOG_ERR("SNDCTL_DSP_SETFRAGMENT failed", errno);
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DEBUG_TSMF("sample_rate %"PRIu32" channels %"PRIu32" bits_per_sample %"PRIu32"",
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sample_rate, channels, bits_per_sample);
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return TRUE;
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}
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static BOOL tsmf_oss_play(ITSMFAudioDevice* audio, const BYTE* data, UINT32 data_size)
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{
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int status;
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UINT32 offset;
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TSMFOssAudioDevice* oss = (TSMFOssAudioDevice*)audio;
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DEBUG_TSMF("tsmf_oss_play: data_size %"PRIu32"", data_size);
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if (oss == NULL || oss->pcm_handle == -1)
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return FALSE;
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if (data == NULL || data_size == 0)
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return TRUE;
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offset = 0;
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oss->data_size_last = data_size;
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while (offset < data_size)
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{
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status = write(oss->pcm_handle, &data[offset], (data_size - offset));
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if (status < 0)
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{
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OSS_LOG_ERR("write fail", errno);
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return FALSE;
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}
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offset += status;
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}
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return TRUE;
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}
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static UINT64 tsmf_oss_get_latency(ITSMFAudioDevice* audio)
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{
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UINT64 latency = 0;
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TSMFOssAudioDevice* oss = (TSMFOssAudioDevice*)audio;
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if (oss == NULL)
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return 0;
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//latency = ((oss->data_size_last / (oss->bits_per_sample / 8)) * oss->sample_rate);
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//WLog_INFO(TAG, "latency: %zu", latency);
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return latency;
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}
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static BOOL tsmf_oss_flush(ITSMFAudioDevice* audio)
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{
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return TRUE;
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}
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static void tsmf_oss_free(ITSMFAudioDevice* audio)
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{
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TSMFOssAudioDevice* oss = (TSMFOssAudioDevice*)audio;
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if (oss == NULL)
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return;
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if (oss->pcm_handle != -1)
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{
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WLog_INFO(TAG, "close: %s", oss->dev_name);
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close(oss->pcm_handle);
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}
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free(oss);
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}
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#ifdef BUILTIN_CHANNELS
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#define freerdp_tsmf_client_audio_subsystem_entry oss_freerdp_tsmf_client_audio_subsystem_entry
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#else
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#define freerdp_tsmf_client_audio_subsystem_entry FREERDP_API freerdp_tsmf_client_audio_subsystem_entry
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#endif
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ITSMFAudioDevice* freerdp_tsmf_client_audio_subsystem_entry(void)
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{
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TSMFOssAudioDevice* oss;
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oss = (TSMFOssAudioDevice*)malloc(sizeof(TSMFOssAudioDevice));
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ZeroMemory(oss, sizeof(TSMFOssAudioDevice));
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oss->iface.Open = tsmf_oss_open;
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oss->iface.SetFormat = tsmf_oss_set_format;
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oss->iface.Play = tsmf_oss_play;
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oss->iface.GetLatency = tsmf_oss_get_latency;
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oss->iface.Flush = tsmf_oss_flush;
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oss->iface.Free = tsmf_oss_free;
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oss->pcm_handle = -1;
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return (ITSMFAudioDevice*)oss;
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}
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