mirror of
https://github.com/dj0abr/SSB_HighSpeed_Modem.git
synced 2024-11-25 13:48:47 -05:00
500 lines
14 KiB
C++
Executable File
500 lines
14 KiB
C++
Executable File
/*
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* High Speed modem to transfer data in a 2,7kHz SSB channel
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* =========================================================
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* Author: DJ0ABR
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*
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* (c) DJ0ABR
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* www.dj0abr.de
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* audio.c ... very similar to audio.c but is used for Microphone / Loudspeaker
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*
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*/
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#include "hsmodem.h"
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void init_pipes_voice();
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BOOL CALLBACK RecordingCallback_voice(HRECORD handle, const void* buffer, DWORD length, void* user);
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DWORD CALLBACK WriteStream_voice(HSTREAM handle, float* buffer, DWORD length, void* user);
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//void CALLBACK EncodeProc(HENCODE handle, DWORD channel, const void* buffer, DWORD length, void* user);
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void cap_write_fifo_voice(float sample);
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int pb_read_fifo_voice(float* data, int elements);
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void setLSvolume(int v);
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void setMICvolume(int v);
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extern AUDIODEVS audioPBdevs[100];
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extern AUDIODEVS audioCAPdevs[100];
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extern int pbanz;
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extern int capanz;
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HRECORD rchan_voice = 0; // recording channel
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BASS_INFO info_voice;
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HSTREAM stream_voice = 0;
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int openpbdev_voice = -1;
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int opencapdev_voice = -1;
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int caprate_voice = VOICE_SAMPRATE;
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int initialLSvol = -1;
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int initialMICvol = -1;
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float softwareCAPvolume_voice = 1;
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// pbdev, capdev: -1=default device
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int init_audio_voice(int setpbdev, int setcapdev)
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{
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static int f = 1;
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int ret = 0;
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if (f == 1)
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{
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// do only once after program start
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f = 0;
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init_pipes_voice();
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}
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// translate requested device numbers to bass device numbers
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if (setpbdev < 0 || setpbdev >= pbanz) setpbdev = 0;
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if (setcapdev < 0 || setcapdev >= capanz) setcapdev = 0;
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int pbdev = -1;
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if (setpbdev >= 0 && setpbdev < pbanz) pbdev = audioPBdevs[setpbdev].bassdev;
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int capdev = -2;
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if (setcapdev >= 0 && setcapdev < capanz) capdev = audioCAPdevs[setcapdev].bassdev;
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printf("voice: init audio_voice, caprate:%d\n", caprate_voice);
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printf("voice: requested LS device: %d bassno:%d name:%s\n", setpbdev, pbdev, audioPBdevs[setpbdev].name);
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printf("voice: requested MIC device: %d bassno:%d name:%s\n", setcapdev, capdev, audioCAPdevs[setcapdev].name);
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#ifdef _WIN32_
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// use WASAPI for Windows to get exclusive access to sound card
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return init_wasapi_voice(pbdev, capdev);
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#endif
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#ifdef _LINUX_
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close_audio_voice();
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if (VoiceAudioMode == 0) return 0; // Voice off
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// ===== PLAYBACK ======
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// initialize default output device
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if (!BASS_Init(pbdev, caprate_voice, 0, NULL, NULL))
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{
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printf("voice: Can't initialize output device: %d err:%d\n", pbdev, BASS_ErrorGetCode());
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close_audio_voice();
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ret = 1;
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}
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else
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{
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// read real device number
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int device = BASS_GetDevice();
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if (device == -1)
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{
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printf("voice: BASS_GetDevice: %d err:%d\n", pbdev, BASS_ErrorGetCode());
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close_audio_voice();
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ret = 1;
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}
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else
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{
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pbdev = device;
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openpbdev_voice = pbdev;
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printf("voice: real BASS PB Device No: %d\n", pbdev);
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// set play callback
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BASS_GetInfo(&info_voice);
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stream_voice = BASS_StreamCreate(info_voice.freq, 2, BASS_SAMPLE_FLOAT, (STREAMPROC*)WriteStream_voice, 0); // sample: 32 bit float
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BASS_ChannelSetAttribute(stream_voice, BASS_ATTRIB_BUFFER, 0); // no buffering for minimum latency
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BASS_ChannelPlay(stream_voice, FALSE); // start it
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setLSvolume(initialLSvol);
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}
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}
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// ===== CAPTURE ====
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// initalize default recording device
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if (!BASS_RecordInit(capdev))
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{
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printf("voice: Can't initialize recording device: %d err:%d\n", capdev, BASS_ErrorGetCode());
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close_audio_voice();
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ret |= 2;
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}
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else
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{
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// read real device number
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int device = BASS_RecordGetDevice();
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if (device == -1)
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{
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printf("voice: BASS_GetDevice: %d err:%d\n", capdev, BASS_ErrorGetCode());
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close_audio_voice();
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ret |= 2;
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}
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else
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{
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capdev = device;
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printf("voice: real BASS CAP Device No: %d\n", capdev);
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// set capture callback
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rchan_voice = BASS_RecordStart(caprate_voice, 2, BASS_SAMPLE_FLOAT, RecordingCallback_voice, 0);
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if (!rchan_voice) {
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printf("voice: Can't start capturing: %d\n", BASS_ErrorGetCode());
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close_audio_voice();
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ret |= 2;
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}
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else
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{
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opencapdev_voice = capdev;
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setMICvolume(initialMICvol);
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}
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}
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}
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if (ret == 0)
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printf("voice started successfully for PBdev:%d and CAPdev:%d\n", openpbdev_voice, opencapdev_voice);
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else
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{
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opencapdev_voice = -1;
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openpbdev_voice = -1;
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readAudioDevices();
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}
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if (ret == 1)
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printf("voice initialized: PBerror CapOK\n");
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if (ret == 2)
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printf("voice initialized: PBOK CapERROR\n");
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if (ret == 3)
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printf("voice initialized: PBerror CapERROR\n");
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#endif
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return ret;
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}
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#ifdef _LINUX_
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void selectPBdevice_voice()
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{
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if (!BASS_SetDevice(openpbdev_voice))
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printf("BASS_SetDevice: %d err:%d\n", openpbdev_voice, BASS_ErrorGetCode());
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}
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void selectCAPdevice_voice()
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{
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if (!BASS_SetDevice(opencapdev_voice))
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printf("BASS_SetDevice: %d err:%d\n", opencapdev_voice, BASS_ErrorGetCode());
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}
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void close_audio_voice()
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{
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printf("voice: close Audio Devices\n");
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if (stream_voice > 0)
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BASS_StreamFree(stream_voice);
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if (openpbdev_voice != -1)
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{
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selectPBdevice_voice();
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int r = BASS_Free();
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if (!r) printf("voice: Bass_Free error: %d\n", BASS_ErrorGetCode());
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}
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if (rchan_voice > 0)
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BASS_ChannelStop(rchan_voice);
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if (opencapdev_voice != -1)
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{
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selectCAPdevice_voice();
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int rr = BASS_RecordFree();
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if (!rr) printf("voice: Bass_RecordFree error: %d\n", BASS_ErrorGetCode());
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}
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openpbdev_voice = -1;
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opencapdev_voice = -1;
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rchan_voice = 0;
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stream_voice = 0;
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}
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void setLSvolume(int v)
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{
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if (v < 0 || v>100) return;
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// the volume comes in % 0..99
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// map to 0..1
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float vf = v;
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vf /= 100;
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//printf("set PB volume to:%d / %f [0..1]\n", v, vf );
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selectPBdevice_voice();
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if (!BASS_SetVolume(vf))
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printf("setPBvolume: %d err:%d\n", openpbdev_voice, BASS_ErrorGetCode());
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}
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void setMICvolume(int v)
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{
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if (v < 0 || v>100) return;
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// the volume comes in % 0..99
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// map to min/maxPBvol
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float vf = v;
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vf /= 100;
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//printf("set CAP volume to:%d / %f [0..1]\n", v, vf);
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selectCAPdevice_voice();
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if (!BASS_RecordSetInput(-1, BASS_INPUT_ON, vf))
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{
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printf("setCAPvolume: %d err:%d, using software level\n", opencapdev_voice, BASS_ErrorGetCode());
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softwareCAPvolume_voice = ((float)v / 100);
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}
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}
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// capture callback
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BOOL CALLBACK RecordingCallback_voice(HRECORD handle, const void* buffer, DWORD length, void* user)
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{
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//printf("captured %ld samples, channels:%d\n",length/sizeof(float),2);
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//measure_speed(length/sizeof(float));
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float* fbuffer = (float*)buffer;
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//showbytestringf((char*)"cap:", fbuffer, 10);
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//printf("w:%ld ",length/sizeof(float));
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for (unsigned int i = 0; i < (length / sizeof(float)); i += 2)
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{
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//printf("%f\n",fbuffer[i]);
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cap_write_fifo_voice(fbuffer[i]);
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}
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return TRUE; // continue recording
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}
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// play callback
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// length: bytes. float=4byte, 2channels, so it requests samples*8
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DWORD CALLBACK WriteStream_voice(HSTREAM handle, float* buffer, DWORD length, void* user)
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{
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//printf("requested %ld samples\n", length / sizeof(float));
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int ret = pb_read_fifo_voice(buffer, length / sizeof(float));
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if (ret == 0)
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{
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// fifo empty, send 00
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memset(buffer, 0, length);
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}
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return length;
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}
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#endif
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// set volume
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void setVolume_voice(int pbcap, int v)
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{
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if (pbcap == 0) setLSvolume(v);
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else setMICvolume(v);
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}
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// ================= resampling and other tasks for voice audio =================
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// samples come from the data-audio capture with a speed of caprate
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// resample (if required) to VOICE_SAMPRATE, which is the voice-audio rate
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void toVoice(float sample)
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{
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if (caprate == VOICE_SAMPRATE)
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{
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// resampling not required, just put in LS fifo
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pb_write_fifo_voice(sample);
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}
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else
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{
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pb_write_fifo_voice(sample);
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// samprate of incoming signal is 44100, voice needs 48000
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// we have 44100 samples/s, so we ar missing 3900 S/s.
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// if we insert an additional sample every 11 samples
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// this results in a rate of 48109 S/s
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static int cnt = 0;
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if (++cnt >= 11)
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{
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cnt = 0;
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pb_write_fifo_voice(sample);
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}
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}
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}
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// ================= VOICE FIFOs ===================
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#ifdef _WIN32_
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CRITICAL_SECTION cap_crit_sec_voice;
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CRITICAL_SECTION pb_crit_sec_voice;
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#define CAP_LOCK_VOICE EnterCriticalSection(&cap_crit_sec_voice)
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#define PB_LOCK_VOICE EnterCriticalSection(&pb_crit_sec_voice)
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void CAP_UNLOCK_VOICE()
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{
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if (&cap_crit_sec_voice != NULL)
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LeaveCriticalSection(&cap_crit_sec_voice);
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}
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void PB_UNLOCK_VOICE()
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{
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if (&pb_crit_sec_voice != NULL)
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LeaveCriticalSection(&pb_crit_sec_voice);
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}
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#endif
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#ifdef _LINUX_
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pthread_mutex_t cap_crit_sec_voice;
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pthread_mutex_t pb_crit_sec_voice;
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#define CAP_LOCK_VOICE pthread_mutex_lock(&cap_crit_sec_voice)
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void CAP_UNLOCK_VOICE() { pthread_mutex_unlock(&cap_crit_sec_voice); }
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#define PB_LOCK_VOICE pthread_mutex_lock(&pb_crit_sec_voice)
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void PB_UNLOCK_VOICE() { pthread_mutex_unlock(&pb_crit_sec_voice); }
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#endif
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#define AUDIO_PLAYBACK_BUFLEN_VOICE (48000)
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#define AUDIO_CAPTURE_BUFLEN_VOICE (48000)
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int cap_wridx_voice = 0;
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int cap_rdidx_voice = 0;
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float cap_buffer_voice[AUDIO_CAPTURE_BUFLEN_VOICE];
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int pb_wridx_voice = 0;
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int pb_rdidx_voice = 0;
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float pb_buffer_voice[AUDIO_PLAYBACK_BUFLEN_VOICE];
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void init_pipes_voice()
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{
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#ifdef _WIN32_
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if (&cap_crit_sec_voice != NULL) DeleteCriticalSection(&cap_crit_sec_voice);
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InitializeCriticalSection(&cap_crit_sec_voice);
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if (&pb_crit_sec_voice != NULL) DeleteCriticalSection(&pb_crit_sec_voice);
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InitializeCriticalSection(&pb_crit_sec_voice);
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#endif
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}
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// write one sample into the fifo
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// overwrite old data if the fifo is full
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void cap_write_fifo_voice(float sample)
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{
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if (((cap_wridx_voice + 1) % AUDIO_CAPTURE_BUFLEN_VOICE) == cap_rdidx_voice)
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{
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//printf("cap_voice fifo full\n");
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CAP_UNLOCK_VOICE();
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return;
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}
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CAP_LOCK_VOICE;
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cap_buffer_voice[cap_wridx_voice] = sample;
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if (++cap_wridx_voice >= AUDIO_CAPTURE_BUFLEN_VOICE) cap_wridx_voice = 0;
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CAP_UNLOCK_VOICE();
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}
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int cap_read_fifo_voice(float* data)
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{
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CAP_LOCK_VOICE;
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if (cap_rdidx_voice == cap_wridx_voice)
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{
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// Fifo empty, no data available
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CAP_UNLOCK_VOICE();
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return 0;
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}
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*data = cap_buffer_voice[cap_rdidx_voice];
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if (++cap_rdidx_voice >= AUDIO_CAPTURE_BUFLEN_VOICE) cap_rdidx_voice = 0;
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CAP_UNLOCK_VOICE();
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return 1;
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}
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void cap_write_fifo_clear_voice()
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{
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cap_wridx_voice = cap_rdidx_voice = 0;
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}
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void pb_write_fifo_clear_voice()
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{
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pb_wridx_voice = pb_rdidx_voice = 0;
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}
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int pb_fifo_freespace_voice(int nolock)
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{
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int freebuf = 0;
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if (nolock == 0) PB_LOCK_VOICE;
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int elemInFifo = (pb_wridx_voice + AUDIO_PLAYBACK_BUFLEN_VOICE - pb_rdidx_voice) % AUDIO_PLAYBACK_BUFLEN_VOICE;
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freebuf = AUDIO_PLAYBACK_BUFLEN_VOICE - elemInFifo;
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if (nolock == 0) PB_UNLOCK_VOICE();
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return freebuf;
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}
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void pb_write_fifo_voice(float sample)
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{
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PB_LOCK_VOICE;
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// check if there is free space in fifo
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if (pb_fifo_freespace_voice(1) == 0)
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{
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PB_UNLOCK_VOICE();
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//printf("************* pb fifo_voice full\n");
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return;
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}
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pb_buffer_voice[pb_wridx_voice] = sample;
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if (++pb_wridx_voice >= AUDIO_PLAYBACK_BUFLEN_VOICE) pb_wridx_voice = 0;
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PB_UNLOCK_VOICE();
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}
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int pb_fifo_usedspace_voice()
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{
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int anz = pb_fifo_freespace_voice(0);
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return AUDIO_PLAYBACK_BUFLEN_VOICE - anz;
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}
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// read elements floats from fifo or return 0 if not enough floats are available
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int pb_read_fifo_voice(float* data, int elements)
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{
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//printf("pb read fifo_voice: %d\n",elements);
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PB_LOCK_VOICE;
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int e = AUDIO_PLAYBACK_BUFLEN_VOICE - pb_fifo_freespace_voice(1);
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if (e < elements)
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{
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// Fifo empty, no data available
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PB_UNLOCK_VOICE();
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//printf("pb fifo empty, need:%d have:%d size:%d\n",elements,e,AUDIO_PLAYBACK_BUFLEN);
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return 0;
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}
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for (int i = 0; i < elements; i+=2)
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{
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// channel1 and the same for channel 2
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data[i] = pb_buffer_voice[pb_rdidx_voice];
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data[i+1] = pb_buffer_voice[pb_rdidx_voice];
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if (++pb_rdidx_voice >= AUDIO_PLAYBACK_BUFLEN_VOICE) pb_rdidx_voice = 0;
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}
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//printf("read %d floats\n",elements);
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PB_UNLOCK_VOICE();
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return 1;
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}
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void clear_voice_fifos()
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{
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pb_write_fifo_clear_voice();
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cap_write_fifo_clear_voice();
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} |