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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