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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Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_miness...@hotmail.com
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