Hi guys,

I'm working on pjmedia split audio channel left/right and I have the
following issue. I don't know how to send audio from wav audio file only on
left channel of default my audio device. My source code is:

//Test split left right channel

pjmedia_snd_port *snd;

pjmedia_port *sc, *sc_ch1;

pjsua_conf_port_id  sc_slot, sc_ch1_slot;

pjmedia_port *conf;

pj_status_t status;

/* Disable existing sound device */

conf = pjsua_set_no_snd_dev();

/* Create stereo-mono splitter/combiner */

status = pjmedia_splitcomb_create( pool, PJMEDIA_PIA_SRATE(&conf->info) /*
clock rate /, 2 / stereo /, 2 * PJMEDIA_PIA_SPF(&conf->info),
PJMEDIA_PIA_BITS(&conf->info), 0 / options */, &sc);

pj_assert(status == PJ_SUCCESS);

/* Connect channel0 (left channel) to conference port slot0 */

status = pjmedia_splitcomb_set_channel(sc, 1 /* ch1 */, 0 /options/,
conf);

pj_assert(status == PJ_SUCCESS);

/* Create reverse channel for channel1 (right channel?)... */

status = pjmedia_splitcomb_create_rev_channel(pool, sc, 0  /* ch0 /, 0  /
options */, &sc_ch1);

pj_assert(status == PJ_SUCCESS);

status = pjsua_conf_add_port(pool, sc_ch1, &sc_ch1_slot);

pj_assert(status == PJ_SUCCESS);

pj_caching_pool cp;

pj_pool_t *poolAs;

pjmedia_port *file_port;

pjmedia_snd_port *snd_port;

/* Must create a pool factory before we can allocate any memory. */

pj_caching_pool_init(&cp, &pj_pool_factory_default_policy, 0);

/* Create memory pool for our file player */

poolAs = pj_pool_create(&cp.factory, /* pool factory / "wav", / pool name.
/ 4000, / init size / 4000, / increment size / NULL / callback on
error */);

/* Create file media port from the WAV file */

status = pjmedia_wav_player_port_create(pool, /* memory pool /
"testSound.wav", / file to play / 20, / ptime. / 0, / flags / 0, /
default buffer / &file_port/ returned port */    );

if (status != PJ_SUCCESS) {

   error("Unable to use WAV file", status);

}

/* Create sound player port. */

status = pjmedia_snd_port_create_player(poolAs, /* pool */

                 -1, /* use default dev. */

                 PJMEDIA_PIA_SRATE(&file_port->info),/* clock rate. */

                 PJMEDIA_PIA_CCNT(&file_port->info),/* # of channels. */

                 PJMEDIA_PIA_SPF(&file_port->info), /* samples per

frame. */

                 PJMEDIA_PIA_BITS(&file_port->info),/* bits per sample.

*/

                 0, /* options */

                 &snd /* returned port */

          );

          if (status != PJ_SUCCESS) {

                 error("Unable to open sound device", status);

          }



          /* Connect file port to the sound player.

          

          status = pjmedia_snd_port_connect(snd, file_sc);





          /*

          * File should be playing and looping now, using sound device's

thread.

          */





          /* Sleep to allow log messages to flush */

          pj_thread_sleep(100);

How can I solve the issue? Thanks in advice.

Best regards

Ll

Hi Lele,

if you set splitcomb like this:

/* Connect channel0 (left channel) to conference port slot0 /
status = pjmedia_splitcomb_set_channel(sc, 0 / ch0 /, 0 /options/, conf);
status = pjmedia_splitcomb_create_rev_channel(pool, sc, 1  / ch1 /, 0  / options */, &sc_ch1);
status = pjsua_conf_add_port(pool, sc_ch1, &sc_ch1_slot);

and after creating wav player connect it to conference bridge like this:

status = pjsua_conf_add_port(pool, file_port, &file_slot);

then you have following ports in conference bridge:

0 = left
sc_ch1_slot = right
file_slot = wav player

Now connect wav audio to left channel like this:

pjsua_conf_connect(file_slot, 0);

Best regards
Adam

Von: pjsip [mailto:pjsip-bounces@lists.pjsip.org] Im Auftrag von Lele
Gesendet: Mittwoch, 15. März 2017 16:58
An: pjsip@lists.pjsip.org
Betreff: [pjsip] Send audio wav only on left device channel

Hi guys,
I'm working on pjmedia split audio channel left/right and I have the following issue. I don't know how to send audio from wav audio file only on left channel of default my audio device. My source code is:

//Test split left right channel
pjmedia_snd_port *snd;
pjmedia_port *sc, *sc_ch1;
pjsua_conf_port_id  sc_slot, sc_ch1_slot;

pjmedia_port *conf;
pj_status_t status;

/* Disable existing sound device */
conf = pjsua_set_no_snd_dev();

/* Create stereo-mono splitter/combiner /
status = pjmedia_splitcomb_create( pool, PJMEDIA_PIA_SRATE(&conf->info) / clock rate /, 2 / stereo /, 2 * PJMEDIA_PIA_SPF(&conf->info), PJMEDIA_PIA_BITS(&conf->info), 0 / options */, &sc);
pj_assert(status == PJ_SUCCESS);

/* Connect channel0 (left channel) to conference port slot0 /
status = pjmedia_splitcomb_set_channel(sc, 1 / ch1 */, 0 /options/, conf);
pj_assert(status == PJ_SUCCESS);

/* Create reverse channel for channel1 (right channel?)... /
status = pjmedia_splitcomb_create_rev_channel(pool, sc, 0  / ch0 /, 0  / options */, &sc_ch1);
pj_assert(status == PJ_SUCCESS);

status = pjsua_conf_add_port(pool, sc_ch1, &sc_ch1_slot);
pj_assert(status == PJ_SUCCESS);

pj_caching_pool cp;
pj_pool_t *poolAs;
pjmedia_port *file_port;
pjmedia_snd_port *snd_port;

/* Must create a pool factory before we can allocate any memory. */
pj_caching_pool_init(&cp, &pj_pool_factory_default_policy, 0);

/* Create memory pool for our file player /
poolAs = pj_pool_create(&cp.factory, / pool factory / "wav", / pool name. / 4000, / init size / 4000, / increment size / NULL / callback on error */);

/* Create file media port from the WAV file /
status = pjmedia_wav_player_port_create(pool, / memory pool / "testSound.wav", / file to play / 20, / ptime. / 0, / flags / 0, / default buffer / &file_port/ returned port */    );
if (status != PJ_SUCCESS) {
error("Unable to use WAV file", status);
}

/* Create sound player port. /
status = pjmedia_snd_port_create_player(poolAs, / pool /
-1, / use default dev. /
PJMEDIA_PIA_SRATE(&file_port->info),/ clock rate. /
PJMEDIA_PIA_CCNT(&file_port->info),/ # of channels. /
PJMEDIA_PIA_SPF(&file_port->info), / samples per frame. /
PJMEDIA_PIA_BITS(&file_port->info),/ bits per sample. /
0, / options /
&snd / returned port */
);
if (status != PJ_SUCCESS) {
error("Unable to open sound device", status);
}

          /* Connect file port to the sound player.

          status = pjmedia_snd_port_connect(snd, file_sc);


          /*
          * File should be playing and looping now, using sound device's thread.
          */


          /* Sleep to allow log messages to flush */
          pj_thread_sleep(100);

How can I solve the issue? Thanks in advice.

Best regards
Ll

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