使用 PJSIP 的两个声音设备

Question

Here is my problem: I want to develop a SIP client with PJSIP and more precisely with PJSUA. With this SIP client I want to be able to output sound from a call by three differents ways.

1. Inside my headset only
2. On my speakers only
3. Inside my headset and on my speakers both and at the same time

Below is a code example of what I tried:

int listeningMethod = message[0];
pjmedia_aud_dev_route media;
switch (listeningMethod) {
case (int)EnumListeningDevice::SPEAKER:
    printf("Operator asked for SPEAKER\r\n");
    media = PJMEDIA_AUD_DEV_ROUTE_LOUDSPEAKER;
    int idMicro;
    int idOutput;
    if (pjsua_get_snd_dev(&idMicro, &idOutput) == -1) {
        printf("Error pjsua_get_snd_dev\r\n");
    }
    idOutput = obj_PJSIP_Phonie.getIdLoudspeaker();
    if (pjsua_set_snd_dev(idMicro, idOutput) != PJ_SUCCESS) {
        printf("Error pjsua_set_snd_dev ID OUTPUT = %d\r\n", idOutput);
    }
    break;
case (int)EnumListeningDevice::HEADSET:
    media = PJMEDIA_AUD_DEV_ROUTE_EARPIECE;
    printf("Operator asked for HEADSET\r\n");
    if (pjsua_get_snd_dev(&idMicro, &idOutput) == -1) {
        printf("Error pjsua_get_snd_dev\r\n");
    }
    idOutput = obj_PJSIP_Phonie.getIdHeadphone();
    if (pjsua_set_snd_dev(idMicro, idOutput) != PJ_SUCCESS) {
        printf("Error pjsua_set_snd_dev ID OUTPUT = %d\r\n", idOutput);
    }
    break;
case (int)EnumListeningDevice::SPEAKER_AND_HEADSET:
    printf("Operator asked for SPEAKER_AND_HEADSET\r\n");
    break;
default:
    printf("Error in request\r\n");
    break;
}

I am able to switch between my headset or my speaker but I can not find a way to use the two devices at the same time.

I have tried to look at pjmedia_snd_port_create_player function and tried this:

    pjmedia_snd_port* headsetSoundPort;
    pjmedia_snd_port* speakerSoundPort;

    const char* driverNameHeadset = "WMME";
    const char* driverNameSpeaker = "WMME";

    const char* deviceNameHeadset = "Haut-parleurs (4- USB audio COD";
    const char* deviceNameSpeaker = "Haut-parleurs (3- USB audio COD";
    
    pjmedia_aud_dev_index deviceHeadsetIndex;
    pjmedia_aud_dev_index deviceSpeakerIndex;
      
    pjmedia_aud_dev_lookup(driverNameHeadset, deviceNameHeadset, &deviceHeadsetIndex);
    pjmedia_aud_dev_lookup(driverNameSpeaker, deviceNameSpeaker, &deviceSpeakerIndex);

    pjmedia_snd_port_create_player(pool1, deviceHeadsetIndex, 16000, 2, 160, 16, 0, &headsetSoundPort);

    pjmedia_snd_port_create_player(pool1, deviceHeadsetIndex, 16000, 2, 160, 16, 0, &speakerSoundPort);

But without success. Any help would be appreciated. Feel free to ask questions.

Answer 1

Do you have some logs when you try to change over to both?

I am assuming that PJSIP only allows 1 primary sound device per call, as in 1 device that plays/receives audio only. I cannot confirm that without looking through the code etc.