On 09/03/2012 04:41 PM, Reinhard Tartler wrote:
> From: Reimar Döffinger <reimar.doeffin...@gmx.de>
> 
> Not all applications (e.g. MPlayer) set block_align, and
> when using a different demuxer it might not even be
> easily available.
> So fall back to selecting mode based on bit rate as before
> if block_align has not useful value.
> It can't be worse than failing to decode completely.
> 
> Signed-off-by: Reimar Döffinger <reimar.doeffin...@gmx.de>
> (cherry picked from commit 1d0d63052b82c76e10c45cd38cdd27677de72e81)
> 
> Signed-off-by: Reinhard Tartler <siret...@tauware.de>
> ---
>  libavcodec/sipr.c |    5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> Reimar claims that this patch fixes http://bugs.debian.org/686570. I was
> not able to test this patch because avplay fails on the test file that
> was attached to the debian bug with avplay:
> 
>>> ./avplay /tmp/voa03.ra
> avplay version v0.8-2980-ga94da3d, Copyright (c) 2003-2012 the Libav 
> developers
>   built on Sep  3 2012 22:36:41 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
> /tmp/voa03.ra: Operation not permitted
> 
> Comments and over takers welcome.
> 
> diff --git a/libavcodec/sipr.c b/libavcodec/sipr.c
> index 971d05b..f090dc9 100644
> --- a/libavcodec/sipr.c
> +++ b/libavcodec/sipr.c
> @@ -486,7 +486,10 @@ static av_cold int sipr_decoder_init(AVCodecContext * 
> avctx)
>      case 37: ctx->mode = MODE_5k0; break;
>      default:
>          av_log(avctx, AV_LOG_ERROR, "Invalid block_align: %d\n", 
> avctx->block_align);
> -        return AVERROR(EINVAL);
> +        if      (avctx->bit_rate > 12200) ctx->mode = MODE_16k;
> +        else if (avctx->bit_rate > 7500 ) ctx->mode = MODE_8k5;
> +        else if (avctx->bit_rate > 5750 ) ctx->mode = MODE_6k5;
> +        else                              ctx->mode = MODE_5k0;
>      }
>  
>      av_log(avctx, AV_LOG_DEBUG, "Mode: %s\n", modes[ctx->mode].mode_name);

LGTM

-Justin
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