Re: Dolby encoded audio
Re: Dolby encoded audio
- Subject: Re: Dolby encoded audio
- From: Jeff Moore <email@hidden>
- Date: Tue, 19 Mar 2013 19:23:51 -0700
Yes. The data that comes down to the driver will be AC-3. Note that because the format is not mixable, there are parts of the IOAudio family's data transfer pipe that get skipped, particularly the mixing parts.
--
Jeff Moore
Core Audio
Apple
On Mar 19, 2013, at 5:49 PM, Phil Montoya <email@hidden> wrote:
> Very nice! So if we publish an IOAudioStream format with the Dolby sample format, what will we get in our clip call? Will it be Dolby encoded audio data? I ask this because PCM formats arrive as floats so we do have to do some conversion. I'm wondering what type of conversion (if any) is needed for Dolby?
>
> -Phil
>
>
> On Mar 19, 2013, at 5:29 PM, Jeff Moore <email@hidden> wrote:
>
>> Dolby is the format that is called kIOAudioStreamSampleFormat1937AC3 in the header. The format is a bitstream that would be sent over a SPDIF cable.
>>
>> --
>>
>> Jeff Moore
>> Core Audio
>> Apple
>>
>>
>>
>> On Mar 19, 2013, at 5:24 PM, Phil Montoya <email@hidden> wrote:
>>
>>> I'm wondering if it is possible to support Dolby encoded audio in a core audio driver? I don't see Dolby as a choice for the sampleFormat in the IOAudioStreamFormat.
>>
>>
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