yes, switch_core_session_read_frame will be timed right. This is working for
me, but my troubles are in switch_core_session_write_frame.
Is this function timed write too when I put data into this function?
Date: Fri, 26 Mar 2010 12:37:04 -0500
From: anthony.miness...@gmail.com
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] hooked functions are not called while using
one single session
You can use the data you have,
yes the the read will already be timed right
when you get a frame that has flag SFF_CNG you know that there was not a real
frame to read but you should still write
the size id determined from getting the read_impl and using
read_impl->encoded_bytes_per_frame
On Fri, Mar 26, 2010 at 12:23 PM, Francisco Scaramanga <sca...@hotmail.de>
wrote:
ok, which is the best mechanism to controll the amount of data. Can you
recommend a timer? I use PCMA codec with 20 msec intervall.
Date: Fri, 26 Mar 2010 11:31:43 -0500
From: anthony.miness...@gmail.com
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] hooked functions are not called while using
one single session
you can only write back the exact number of bytes you negotiated per interval.
On Fri, Mar 26, 2010 at 7:27 AM, Francisco Scaramanga <sca...@hotmail.de> wrote:
Now I call switch_core_session_read_frame and switch_core_session_write_frame
in the same foreground loop. Then I write audio into a file and as a result I
see that there are many audio gaps.
There seems to be a cross effect by using switch_core_session_write_frame and
switch_core_session_read_frame together.
If I only use switch_core_session_read_frame in the loop, there are no gaps and
everything sounds perfect!
What could be the problem?
while (1)
{
// READ
tstatus = switch_core_session_read_frame(session, &read_frame,
SWITCH_IO_FLAG_NONE, 0);
if (tstatus==SWITCH_STATUS_SUCCESS)
{ // write audio in a testfile
fwrite((short *)(read_frame)->data, 2, ((read_frame)->datalen)/2
,tmp);
switch_size_t ts_rf=read_frame->timestamp;
}
// WRITE
vector<unsigned char> vucIn;
if (getAudio(&vucAudio)) // get next audio and send it back
{
memcpy( write_frame.data, &vucIn[0], vucIn.size());
write_frame.datalen=vucIn.size();
tstatus = switch_core_session_write_frame(session, &write_frame,
SWITCH_IO_FLAG_NONE, 0);
}
//Sleep(1);//?
}
Date: Mon, 22 Mar 2010 18:34:46 -0500
From: anthony.miness...@gmail.com
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] hooked functions are not called while using
one single session
you don't use the hook functions you use a frame pointer
switch_frame_t *read_frame;
switch_core_session_read_frame(session, &read_frame, SWITCH_IO_FLAG_NONE, 0);
when i said to look at the stream file example i meant in the function itself
to see how
to read and write audio from a channel in a foreground loop.
On Mon, Mar 22, 2010 at 6:23 PM, Francisco Scaramanga <sca...@hotmail.de> wrote:
I have an selfmade software which is controlled by a telephone call
(ISDN/CAPI). The user calls with his phone, gets
connected and can speak commands which are detected by an internal speech
recognizer. Furthermore the user can accept
or hangup incoming calls just by his voice command. It is also possible to dial
out.
Now I am adding VOIP functionality to my system and decided to use FreeSwitch.
Therefore I wrote a FreeSwitch module which should be the VOIP interface for my
software. The module must be able to:
1. recognize an incoming call which is the users control session (single
session)
I do this in statehandler function channel_on_init.
2. pick up another incoming call and intercept with my users control session.
3. Get the audio data from voip session (user control session) and send it to
my application (by own tcp-socket)
My idea is to use channel_write_frame to receive audio.
3. Send audio data from my application to voip user control session so the user
can hear audio.
My idea is to use channel_read_frame.
explanation for using hooks:
----------------------------
The endpoint interface callback functions where never called in my module, even
I tried to adapt the way it is done
in mod_portaudio. So my workaround was to set hook functions
channel_read_frame/channel_write_frame to handle audio.
My problems:
------------
The hook functions are working fine if I have 2 sessions (put together by
switch_ivr_intercept_session), but if I only have the single user control
session no hooked function is called. In this case the only way to achieve that
hooks are called, is to play audio with switch_ivr_play_file. But then, audio
samples got lost sometimes.
Maybe there is a better way to solve my requirements?
Date: Mon, 22 Mar 2010 11:55:42 -0500
From: anthony.miness...@gmail.com
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] hooked functions are not called while using
one single session
Why do you even need the hooks?
What exactly are you trying to do?
Maybe you should explain it.
On Mon, Mar 22, 2010 at 5:33 AM, Francisco Scaramanga <sca...@hotmail.de> wrote:
I am now using the application interface and play a file after answering the
call. The call is not connected to a another session, it's just a single
session.
SWITCH_STANDARD_APP(mod_my_function)
{
/* play audio file */
switch_ivr_play_file(session, NULL,
"C:\\freeswitch1.0.4\\debug\\sounds\\music\\8000\\danza-espanola-op-37-h-142-xii-arabesca.wav",
NULL);
}
Now the hooks for channel_write_frame and channel_read_frame are called! I
write the audio frames into a file for testing if everything is correct. The
data written in channel_write_frame seems to be perfect, but audio written in
channel_read_frame only seems to be good at first sight. If I record 20 seconds
of audio and listen to the audiofile I hear that 2 or 3 times short parts are
missing.
static switch_status_t channel_write_frame(switch_core_session_t *session,
switch_frame_t *frame, switch_io_flag_t flags, int stream_id)
{
// Audio from danza-espanola-op-37-h-142-xii-arabesca.wav is written into a
file
fwrite((short *)frame->data, 2, frame->datalen/2 ,tmp);
}
static switch_status_t channel_read_frame(switch_core_session_t *session,
switch_frame_t **frame, switch_io_flag_t flags, int stream_id)
{
// Spoken audio samples from my microphone are written, but sometimes
samples are missing
fwrite((short *)frame->data, 2, frame->datalen/2 ,tmp);
}
Is it possible that I don't get all audio samples by hooked functions? why
audio recorded in channel_write_frame is brilliant and in channel_read_frame
not?
Date: Tue, 16 Mar 2010 13:59:28 -0500
From: anthony.miness...@gmail.com
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] hooked functions are not called while using
one single session
you probably want to use the application interface and a while loop while
reading a frame.
see most of the functions in switch_ivr_play_say
On Tue, Mar 16, 2010 at 8:51 AM, Francisco Scaramanga <sca...@hotmail.de> wrote:
The module I am writing should be an endpoint VOIP-interface for another
program. The module should answer a call and transport incoming audio into a
3rd party application. Furthermore the 3rd party application sends audio data
back to the caller. This is why I hooked channel_read_frame and
channel_write_frame.
How can I trigger the channel to do something that requires reading or writing
audio? Does it make a difference to use the endpoint interface instead of the
hooks?
Date: Tue, 16 Mar 2010 08:34:18 -0500
From: anthony.miness...@gmail.com
To: freeswitch-dev@lists.freeswitch.org
Subject: Re: [Freeswitch-dev] hooked functions are not called while using
one single session
What exactly is your goal?
those hooks will probably only be called if you send the channel to do
something that
requires reading and writing audio.
On Tue, Mar 16, 2010 at 6:47 AM, Francisco Scaramanga <sca...@hotmail.de> wrote:
Hello,
I am writing my own freeswitch module and have implemented 2 hooks for reading
and writing audio (I did not implement the endpoint interface).
My problem is that the channel_write_frame and channel_read_frame
callback-functions are only called if I make an intercept with another session
(switch_ivr_intercept_session), but my usecase has only one single Session for
getting and putting audio data in my module.
How can I achieve this?
scaram
/* on channel init I answer the session and set hooks */
static switch_status_t channel_on_init(switch_core_session_t *session)
{
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_channel_answer(channel);
switch_channel_set_state(channel, CS_EXCHANGE_MEDIA);
switch_set_flag(tech_pvt, TFLAG_IO);
switch_core_event_hook_add_write_frame(session, &channel_write_frame);
switch_core_event_hook_add_read_frame(session, &channel_read_frame);
}
static switch_status_t channel_write_frame(switch_core_session_t *session,
switch_frame_t *frame, switch_io_flag_t flags, int stream_id)
{
/* is only called when I intercept 2 Sessions */
}
static switch_status_t channel_read_frame(switch_core_session_t *session,
switch_frame_t *frame, switch_io_flag_t flags, int stream_id)
{
/* is only called when I intercept 2 Sessions */
}
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