DM816x audio encoding on DSP: wrong timing (too slow) for 32 bit PCM input (S32_LE)

Hello,

My OMX application captures & encodes audio (48kHz, stereo 32bit pcm) using the DSP.

When capturing direclty from an alsa device (using snd_pcm_readi, blocking reads) the result is slowed down:

When using a 16 bit PCM file for input, everything is encoded fine, when using  a 32bit PCM file for input, it's slowed down.

Does the codec support 32 bit?

The AAClcenc datasheet & manual list no limitation to 16 bit.

This is my codec config:

    debug_printf ("aenc set input format (pcm)\n");//input
    OMX_INIT_PARAM(&pcm_mode);
    pcm_mode.nPortIndex = OMX_AUDENC_INPUT_PORT;
    OMX_GetParameter(aenc, OMX_IndexParamAudioPcm, &pcm_mode);
    pcm_mode.nChannels = channels;
    pcm_mode.nSamplingRate = samplerate;
    pcm_mode.eNumData = OMX_NumericalDataSigned;
    pcm_mode.eEndian = OMX_EndianLittle;
    pcm_mode.bInterleaved = 1;//bool
    pcm_mode.nBitPerSample = 32;
    pcm_mode.ePCMMode = OMX_AUDIO_PCMModeLinear;
    eError = OMX_SetParameter(aenc, OMX_IndexParamAudioPcm, &pcm_mode);
    if(eError != OMX_ErrorNone) return eError;

    debug_printf ("aenc set output format\n");//output
    OMX_INIT_PARAM(&aac_mode);
    aac_mode.nPortIndex = OMX_AUDENC_OUTPUT_PORT;
    OMX_GetParameter(aenc, OMX_IndexParamAudioAac, &aac_mode);
    aac_mode.nBitRate = bitrate;
    if(format==1) aac_mode.eAACStreamFormat = OMX_AUDIO_AACStreamFormatRAW;
    else if(format==2) aac_mode.eAACStreamFormat = OMX_AUDIO_AACStreamFormatMP4ADTS;
    else aac_mode.eAACStreamFormat = OMX_AUDIO_AACStreamFormatADIF;
    eError = OMX_SetParameter(aenc, OMX_IndexParamAudioAac, &aac_mode);
    if(eError != OMX_ErrorNone) return eError;

channels = 2, samplerate 48000, bitrate 192000.

Best regards,

Lo2