Hi Ravi,
I had seen this case in pvmf_omx_audiodec_node.cpp
This is what the case(The code is from the cupcake version of Android):
case OMX_EventPortSettingsChanged:
{
LOGD("EventHandlerProcessing::OMX_EventPortSettingsChanged");
PVLOGGER_LOGMSG(PVLOGMSG_INST_LLDBG, iLogger, PVLOGMSG_STACK_TRACE,
(0, "PVMFOMXAudioDecNode::EventHandlerProcessing:
OMX_EventPortSettingsChanged returned from OMX component"));
// first check if dynamic reconfiguration is already in progress,
// if so, wait until this is completed, and then initiate the 2nd
reconfiguration
if (iDynamicReconfigInProgress)
{
LOGD("EventHandlerProcessing::OMX_EventPortSettingsChanged::iDynamicReconfigInProgress");
PVLOGGER_LOGMSG(PVLOGMSG_INST_LLDBG, iLogger,
PVLOGMSG_STACK_TRACE,
(0,
"PVMFOMXAudioDecNode::EventHandlerProcessing: OMX_EventPortSettingsChanged
returned for port %d, dynamic reconfig already in progress", aData1));
iSecondPortToReconfig = aData1;
iSecondPortReportedChange = true;
// check the audio sampling rate and fs right away in case of
output port
// is this output port?
if (iSecondPortToReconfig == iOutputPortIndex)
{
OMX_ERRORTYPE Err;
// GET the output buffer params and sizes
OMX_AUDIO_PARAM_PCMMODETYPE Audio_Pcm_Param;
Audio_Pcm_Param.nPortIndex = iOutputPortIndex; // we're
looking for output port params
Audio_Pcm_Param.nSize = sizeof(OMX_AUDIO_PARAM_PCMMODETYPE);
Audio_Pcm_Param.nVersion.s.nVersionMajor = SPECVERSIONMAJOR;
Audio_Pcm_Param.nVersion.s.nVersionMinor = SPECVERSIONMINOR;
Audio_Pcm_Param.nVersion.s.nRevision = SPECREVISION;
Audio_Pcm_Param.nVersion.s.nStep = SPECSTEP;
Err = OMX_GetParameter(iOMXAudioDecoder,
OMX_IndexParamAudioPcm, &Audio_Pcm_Param);
if (Err != OMX_ErrorNone)
{
PVLOGGER_LOGMSG(PVLOGMSG_INST_HLDBG, iLogger,
PVLOGMSG_ERR,
(0,
"PVMFOMXAudioDecNode::EventHandlerProcessing() PortSettingsChanged -> Cannot
get component output parameters"));
SetState(EPVMFNodeError);
ReportErrorEvent(PVMFErrResource);
}
iPCMSamplingRate = Audio_Pcm_Param.nSamplingRate; // can be
set to 0 (if unknown)
if (iPCMSamplingRate == 0) // use default sampling rate
(i.e. 48000)
iPCMSamplingRate = PVOMXAUDIODEC_DEFAULT_SAMPLINGRATE;
iNumberOfAudioChannels = Audio_Pcm_Param.nChannels;
// should be 1 or 2
if (iNumberOfAudioChannels != 1 && iNumberOfAudioChannels
!= 2)
{
PVLOGGER_LOGMSG(PVLOGMSG_INST_HLDBG, iLogger,
PVLOGMSG_ERR,
(0,
"PVMFOMXAudioDecNode::EventHandlerProcessing() PortSettingsChanged -> Output
parameters num channels = %d", iNumberOfAudioChannels));
SetState(EPVMFNodeError);
ReportErrorEvent(PVMFErrResource);
}
}
}
else
{
PVLOGGER_LOGMSG(PVLOGMSG_INST_LLDBG, iLogger,
PVLOGMSG_STACK_TRACE,
(0,
"PVMFOMXAudioDecNode::EventHandlerProcessing: OMX_EventPortSettingsChanged
returned for port %d", aData1));
iProcessingState =
EPVMFOMXAudioDecNodeProcessingState_PortReconfig;
iPortIndexForDynamicReconfig = aData1;
// start "discarding" data right away, don't wait
// check the audio sampling rate and fs right away in case of
output port
// is this output port?
if (iPortIndexForDynamicReconfig == iOutputPortIndex)
{
OMX_ERRORTYPE Err;
// GET the output buffer params and sizes
OMX_AUDIO_PARAM_PCMMODETYPE Audio_Pcm_Param;
Audio_Pcm_Param.nPortIndex = iOutputPortIndex; // we're
looking for output port params
Audio_Pcm_Param.nSize = sizeof(OMX_AUDIO_PARAM_PCMMODETYPE);
Audio_Pcm_Param.nVersion.s.nVersionMajor = SPECVERSIONMAJOR;
Audio_Pcm_Param.nVersion.s.nVersionMinor = SPECVERSIONMINOR;
Audio_Pcm_Param.nVersion.s.nRevision = SPECREVISION;
Audio_Pcm_Param.nVersion.s.nStep = SPECSTEP;
Err = OMX_GetParameter(iOMXAudioDecoder,
OMX_IndexParamAudioPcm, &Audio_Pcm_Param);
if (Err != OMX_ErrorNone)
{
PVLOGGER_LOGMSG(PVLOGMSG_INST_HLDBG, iLogger,
PVLOGMSG_ERR,
(0,
"PVMFOMXAudioDecNode::EventHandlerProcessing() PortSettingsChanged -> Cannot
get component output parameters"));
SetState(EPVMFNodeError);
ReportErrorEvent(PVMFErrResource);
}
iPCMSamplingRate = Audio_Pcm_Param.nSamplingRate; // can be
set to 0 (if unknown)
if (iPCMSamplingRate == 0) // use default sampling rate
(i.e. 48000)
iPCMSamplingRate = PVOMXAUDIODEC_DEFAULT_SAMPLINGRATE;
iNumberOfAudioChannels = Audio_Pcm_Param.nChannels;
// should be 1 or 2
if (iNumberOfAudioChannels != 1 && iNumberOfAudioChannels
!= 2)
{
PVLOGGER_LOGMSG(PVLOGMSG_INST_HLDBG, iLogger,
PVLOGMSG_ERR,
(0,
"PVMFOMXAudioDecNode::EventHandlerProcessing() PortSettingsChanged -> Output
parameters num channels = %d", iNumberOfAudioChannels));
SetState(EPVMFNodeError);
ReportErrorEvent(PVMFErrResource);
}
}
iDynamicReconfigInProgress = true;
}
RunIfNotReady();
break;
}//end of case OMX_PortSettingsChanged
Here if you see it gets the parameter from audio decode node which in turn
calls the decoder component layer
After geting the values it sets its own value.
But what I need is that I want to get the values from WAV Parser and set the
same to decoder component layer
Because In my case the WAV Parser is the one which has the proper info which I
want to Pass it on to decoder layer.
How can I do that.
--Giri
________________________________
From: RaviY <[email protected]>
To: android-framework <[email protected]>
Sent: Saturday, 11 July, 2009 7:39:29 PM
Subject: Re: how does omx component comes to know about the number of channels
and sampling rate of the audio clip
Search for OMX_EventPortSettingsChanged.
On Jul 11, 1:12 am, sesha giri <[email protected]> wrote:
> Hi
>
> I was asking how does that port reconfiguration happens.
> I didnt find that any where
> Even it happens it does not configure the sampling rate and number of chanels.
>
> Regarding the WAV component I am writing my own WAV component for G711.
>
> -Giri
>
> ________________________________
> From: RaviY <[email protected]>
> To: android-framework <[email protected]>
> Sent: Saturday, 11 July, 2009 9:03:06 AM
> Subject: Re: how does omx component comes to know about the number of
> channels and sampling rate of the audio clip
>
> I am not sure I understand the problem correctly. The parameters
> initialized in the OMX components are just for "initialization". IF,
> by change, the parameters match the actual clip, then the advantage
> would be that there will not be any port reconfiguration for the OMX
> components. That's about it.
>
> Also, you are talking about WAV clips, for which, there is no OMX
> component.
>
> -Ravi
>
> On Jul 10, 1:40 pm, sesha giri <[email protected]> wrote:
>
>
>
> > Hi
>
> > In the omx_component file for the specific decoder there are few
> > initializations
> > In those sampling rate and number of channels are also initialized.
>
> > But I can see these are hard coded.
> > Which is not correct.
> > I am trying to play different ulaw files with different sampling rates.
> > But I have to all the time change the values manualy and give the build.
>
> > But this should not be the case.
> > I can see the WAV parser reads these info.
> > But I am not getting how to give the same info to decoder component.
>
> > Please help me in this regard.
>
> > Giri
>
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