[Spice-devel] [PATCH spice-html5] Condense the playback queue before adding to the Media Buffer.

[Pavel Grunt]

Yeah, it improves the audio playback a lot.

Ack,
Pavel

On Thu, 2016-12-15 at 13:06 -0600, Jeremy White wrote:
> This helps Firefox in situations where the incoming traffic
> is preventing the audio element from processing data quickly enough.
> 
> Signed-off-by: Jeremy White <jwhite at codeweavers.com>
> ---
>  playback.js | 24 +++++++++++++++++++++++-
>  1 file changed, 23 insertions(+), 1 deletion(-)
> 
> diff --git a/playback.js b/playback.js
> index 48d4cdd..5af9233 100644
> --- a/playback.js
> +++ b/playback.js
> @@ -289,6 +289,28 @@ function handle_source_closed(e)
>      p.log_err('Audio source unexpectedly closed.');
>  }
>  
> +function condense_playback_queue(queue)
> +{
> +    if (queue.length == 1)
> +        return queue.shift();
> +
> +    var len = 0;
> +    var i = 0;
> +    for (i = 0; i < queue.length; i++)
> +        len += queue[i].byteLength;
> +
> +    var mb = new ArrayBuffer(len);
> +    var tmp = new Uint8Array(mb);
> +    len = 0;
> +    for (i = 0; i < queue.length; i++)
> +    {
> +        tmp.set(new Uint8Array(queue[i]), len);
> +        len += queue[i].byteLength;
> +    }
> +    queue.length = 0;
> +    return mb;
> +}
> +
>  function handle_append_buffer_done(e)
>  {
>      var p = this.spiceconn;
> @@ -298,7 +320,7 @@ function handle_append_buffer_done(e)
>  
>      if (p.queue.length > 0)
>      {
> -        var mb = p.queue.shift();
> +        var mb = condense_playback_queue(p.queue);
>          playback_append_buffer(p, mb);
>      }
>      else