[Freeswitch-dev] hooked functions are not called while using one single session

Mon Mar 22 09:55:42 PDT 2010

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 <scaram at 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.minessale at gmail.com
> To: freeswitch-dev at 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 <scaram at 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.minessale at gmail.com
> To: freeswitch-dev at 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 <scaram at 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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-- 
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