linux-kernel - Re: [PATCH v3] ALSA: compress: allow setting codec params after next track

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Message-ID: <ZJKJRnMuYvy7GrsD@matsya>
Date:   Wed, 21 Jun 2023 10:53:18 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     broonie@...nel.org, tiwai@...e.com, corbet@....net,
        alsa-devel@...a-project.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_plai@...cinc.com,
        quic_mohs@...cinc.com
Subject: Re: [PATCH v3] ALSA: compress: allow setting codec params after next
 track

On 19-06-23, 10:28, Srinivas Kandagatla wrote:
> For gapless playback it is possible that each track can have different
> codec profile with same decoder, for example we have WMA album,
> we may have different tracks as WMA v9, WMA v10 and so on
> 
> Or if DSP's like QDSP have abililty to switch decoders on single stream
> for each track, then this call could be used to set new codec parameters.
> 
> Existing code does not allow to change this profile while doing gapless
> playback.
> 
> Reuse existing SNDRV_COMPRESS_SET_PARAMS to set this new track params along
> some additional checks to enforce proper state machine.
> 
> With this new changes now the user can call SNDRV_COMPRESS_SET_PARAMS
> anytime after setting next track and additional check in write should
> also ensure that params are set before writing new data.

Acked-by: Vinod Koul <vkoul@...nel.org>

-- 
~Vinod