you don't use the hook functions you use a frame pointer <br><br>switch_frame_t *read_frame;<br><br>switch_core_session_read_frame(session, &read_frame, SWITCH_IO_FLAG_NONE, 0);<br><br>when i said to look at the stream file example i meant in the function itself to see how <br>
to read and write audio from a channel in a foreground loop.<br><br><br><br><div class="gmail_quote">On Mon, Mar 22, 2010 at 6:23 PM, Francisco Scaramanga <span dir="ltr"><<a href="mailto:scaram@hotmail.de">scaram@hotmail.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>
I have an selfmade software which is controlled by a telephone call (ISDN/CAPI). The user calls with his phone, gets <br>connected and can speak commands which are detected by an internal speech recognizer. Furthermore the user can accept <br>
or hangup incoming calls just by his voice command. It is also possible to dial out. <br><br>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:<br>
<br>1. recognize an incoming call which is the users control session (single session)<br> I do this in statehandler function channel_on_init.<br>2. pick up another incoming call and intercept with my users control session. <br>
3. Get the audio data from voip session (user control session) and send it to my application (by own tcp-socket)<br> My idea is to use channel_write_frame to receive audio.<br>3. Send audio data from my application to voip user control session so the user can hear audio.<br>
My idea is to use channel_read_frame.<br><br>explanation for using hooks:<br>----------------------------<br>The endpoint interface callback functions where never called in my module, even I tried to adapt the way it is done <br>
in mod_portaudio. So my workaround was to set hook functions channel_read_frame/channel_write_frame to handle audio. <br><br>My problems:<br>------------<br>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.<br>
<br>Maybe there is a better way to solve my requirements? <br><br><br><br><br><hr>Date: Mon, 22 Mar 2010 11:55:42 -0500<div><div></div><div class="h5"><br>From: <a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.com</a><br>
To: <a href="mailto:freeswitch-dev@lists.freeswitch.org" target="_blank">freeswitch-dev@lists.freeswitch.org</a><br>Subject: Re: [Freeswitch-dev] hooked functions are not called while using one single session<br><br>Why do you even need the hooks?<br>
What exactly are you trying to do?<br>Maybe you should explain it.<br><br><br><div>On Mon, Mar 22, 2010 at 5:33 AM, Francisco Scaramanga <span dir="ltr"><<a href="mailto:scaram@hotmail.de" target="_blank">scaram@hotmail.de</a>></span> wrote:<br>
<blockquote style="padding-left: 1ex;">
<div>
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.<br><br>SWITCH_STANDARD_APP(mod_my_function)<br>{<br> /* play audio file */<br>
switch_ivr_play_file(session, NULL, "C:\\freeswitch1.0.4\\debug\\sounds\\music\\8000\\danza-espanola-op-37-h-142-xii-arabesca.wav", NULL);<br>}<br><br>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. <br>
<div><br>static switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id)<br>{<br></div> // Audio from danza-espanola-op-37-h-142-xii-arabesca.wav is written into a file<br>
fwrite((short *)frame->data, 2, frame->datalen/2 ,tmp);<div><br>}<br>static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id)<br>
{<br></div> // Spoken audio samples from my microphone are written, but sometimes samples are missing<br> fwrite((short *)frame->data, 2, frame->datalen/2 ,tmp);<br>}<br><br>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?<br>
<br><br><br><br><br><br><hr>Date: Tue, 16 Mar 2010 13:59:28 -0500<div><div></div><div><br>From: <a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.com</a><br>To: <a href="mailto:freeswitch-dev@lists.freeswitch.org" target="_blank">freeswitch-dev@lists.freeswitch.org</a><br>
Subject: Re: [Freeswitch-dev] hooked functions are not called while using one single session<br><br>you probably want to use the application interface and a while loop while reading a frame.<br><br>see most of the functions in switch_ivr_play_say<br>
<br><br><div>On Tue, Mar 16, 2010 at 8:51 AM, Francisco Scaramanga <span dir="ltr"><<a href="mailto:scaram@hotmail.de" target="_blank">scaram@hotmail.de</a>></span> wrote:<br>
<blockquote style="padding-left: 1ex;">
<div>
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. <br>
<br>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? <br><br><br><hr>Date: Tue, 16 Mar 2010 08:34:18 -0500<br>
From: <a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.com</a><br>To: <a href="mailto:freeswitch-dev@lists.freeswitch.org" target="_blank">freeswitch-dev@lists.freeswitch.org</a><br>Subject: Re: [Freeswitch-dev] hooked functions are not called while using one single session<div>
<div></div><div><br><br>What exactly is your goal?<br><br>those hooks will probably only be called if you send the channel to do something that <br>requires reading and writing audio.<br><br><br><div>On Tue, Mar 16, 2010 at 6:47 AM, Francisco Scaramanga <span dir="ltr"><<a href="mailto:scaram@hotmail.de" target="_blank">scaram@hotmail.de</a>></span> wrote:<br>
<blockquote style="padding-left: 1ex;">
<div>
Hello,<br>I am writing my own freeswitch module and have implemented 2 hooks for reading and writing audio (I did not implement the endpoint interface).<br>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. <br>
<br>How can I achieve this? <br>scaram<br><br>/* on channel init I answer the session and set hooks */<br>static switch_status_t channel_on_init(switch_core_session_t *session)<br>{<br> switch_channel_t *channel = switch_core_session_get_channel(session);<br>
switch_channel_answer(channel);<br><br> switch_channel_set_state(channel, CS_EXCHANGE_MEDIA);<br> switch_set_flag(tech_pvt, TFLAG_IO);<br><br> switch_core_event_hook_add_write_frame(session, &channel_write_frame);<br>
switch_core_event_hook_add_read_frame(session, &channel_read_frame);<br>}<br><br>static switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id)<br>
{<br> /* is only called when I intercept 2 Sessions */<br>}<br>static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id)<br>{<br> /* is only called when I intercept 2 Sessions */<br>
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