6e0e0c9ce8
fixup Rework on audio buffer management
2017-05-15 21:46:28 +02:00
8e0d7d2513
samplerate.c: Allow transcoding to lower sample rate other than 8000 Hz
2017-03-04 16:52:20 +01:00
4201717f36
Rework on audio buffer management
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Use function to get samples to be sent to fill audio buffers to a
level. This replaces the function that only shows how much data
is in the buffer.
This way the function itself can control how much data will be
sent.
2017-03-04 06:35:38 +01:00
2e1999b1ee
Start streaming of sound/SDR just before main loop
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This prevents buffer overflow during init/creation processes
2017-02-25 07:09:53 +01:00
f5e9a97c31
--rx-gain option works now only with sound card
2017-02-18 21:01:16 +01:00
7e45f556ce
Correcting all levels and move all remaining integer samples to sample_t
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The leves are based on the standards of each mobile network. They
are adjusted to the specified frequency deviation now.
2017-02-18 21:01:13 +01:00
bd7ccc5fa0
Add global DC-Filter and remove all individual DC-Filters
2017-02-18 21:01:12 +01:00
7ea3bc188d
Move samples of int16_t format to sample_t, that is of type double
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This prepares the correction of all levels
2017-02-18 21:01:08 +01:00
a7e47f83d7
Fixed paging channel switching of B-Netz
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Now the calling channel is switched correctly.
A global parameter is used to select how paging is performed.
2017-02-18 21:01:03 +01:00
19b396ab4d
Wave recording and playback now uses multi channels
2017-02-18 21:00:59 +01:00
8b9277615d
Neu structure for the paging process (B-Netz)
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Paging tones are not created within sound_alsa.c
The audio API is now responsible to switch to paging channel.
In case of SDR, the sdr.c will switch frequency offset.
2017-02-18 21:00:50 +01:00
b30b61282c
Generic SDR support
2017-02-18 21:00:48 +01:00
c5cf88ce57
Prepare for SDR: Add bandwidth and deviation info to sender instance
2017-02-18 21:00:47 +01:00
9ff8c3bb25
Rework on audio interface
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Sound instance is now called audio instance and uses funcation pointers.
This gives a clean interface to be exchanged with other technologies,
linke SDR.
2017-02-18 21:00:45 +01:00
d54d3ac265
prepare audio handling for multi carrier SDR
2017-01-07 06:28:24 +01:00
b1c452cf12
Changed command line options
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* All lower case options define common options
* All upper case options define network specific options
2016-11-27 22:06:47 +01:00
6c1b6119ad
common code: Display multiple wave forms for each channel used
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Use 'w' key to enable/disable RX wave form display.
2016-10-31 19:16:47 +01:00
c1a02a5029
common code: Fix double free bug
2016-10-28 16:55:39 +02:00
1ea95de120
C-Netz: Use emphasis with 200 uS time constant
2016-10-23 08:46:05 +02:00
Andreas Eversberg
b205cfcf03
B-Netz: Work on pilot signal generation
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The pilot signal to switch to channel 19 can be:
* a tone
* a tone that is turned off (notone)
* positive amplitude
* negative amplitude
2016-10-03 14:56:15 +02:00
f729b32745
C-Netz: Fixed multi-transceiver mode and show channel in various logs
2016-07-31 18:48:19 +02:00
7d5d3da8d3
Add function to display wave form from input/loop
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Use 'w' to toggle display.
Move terminal input processing and main loop to main_common.c
2016-06-17 17:03:28 +02:00
4d22b11855
common code: Add debug #define for capture generated singal
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Used for fundamental debugging of encoded signal
2016-06-12 16:11:20 +02:00
bae12156a2
common code: Add input gain option
2016-05-08 15:49:45 +02:00
7434e21dc2
Multi transceiver support
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This can be multiple transceivers on multiple sound cards.
Two transceivers can be bundled on one sound device as well, using both channels.
2016-05-08 15:48:13 +02:00
16acdbf59d
Implementation of C-Netz (German mobile telephone system)
2016-04-24 15:19:00 +02:00
4356c93afa
common: Add pre and de emphasis, if the radio does not support it
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Connect to the oscillator of the transmitter - good girl!
You need to enable pre emphasis in this case.
Connect to the discriminator of the receiver - good boy!
You need to enable de emphasis in this case.
2016-04-24 15:14:56 +02:00
1146537d84
common code: Add feature to record received audio and replay it
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-W <file.wav> writes a wave file of received audio
-R <file.wav> reads a wave file to feed into decoder
This way you can record a phone and later debug without a phone
and radio equipment.
2016-03-27 17:56:04 +02:00
946c9ce10a
initial git import
2016-03-13 09:12:11 +01:00
Andreas Eversberg
Andreas Eversberg