[FFmpeg-devel] [PATCH] lavfi/atempo: avoid asendcmd assertion failure

[Rajiv Harlalka]

On 3/13/24 8:39 AM, Pavel Koshevoy wrote:
> On Tue, Mar 12, 2024 at 9:01 PM Pavel Koshevoy <pkoshevoy at gmail.com> wrote:
>
>> From: Rajiv Harlalka <rajivharlalka009 at gmail.com>
>>
>> Check for zeros equal to the total samples early, because in
>> that case we would already be leaving the first few frames out.
>>
>> Fixes trac ticket #10692
>> ---
>>   libavfilter/af_atempo.c | 18 +++++++++---------
>>   1 file changed, 9 insertions(+), 9 deletions(-)
>>
>> diff --git a/libavfilter/af_atempo.c b/libavfilter/af_atempo.c
>> index 4621b67b03..654b080e89 100644
>> --- a/libavfilter/af_atempo.c
>> +++ b/libavfilter/af_atempo.c
>> @@ -531,21 +531,21 @@ static int yae_load_frag(ATempoContext *atempo,
>>       dst = frag->data;
>>
>>       start = atempo->position[0] - atempo->size;
>> -    zeros = 0;
>>
>> -    if (frag->position[0] < start) {
>> -        // what we don't have we substitute with zeros:
>> -        zeros = FFMIN(start - frag->position[0], (int64_t)nsamples);
>> -        av_assert0(zeros != nsamples);
>> -
>> -        memset(dst, 0, zeros * atempo->stride);
>> -        dst += zeros * atempo->stride;
>> -    }
>> +    // what we don't have we substitute with zeros:
>> +    zeros =
>> +      frag->position[0] < start ?
>> +      FFMIN(start - frag->position[0], (int64_t)nsamples) : 0;
>>
>>       if (zeros == nsamples) {
>>           return 0;
>>       }
>>
>> +    if (frag->position[0] < start) {
>> +        memset(dst, 0, zeros * atempo->stride);
>> +        dst += zeros * atempo->stride;
>> +    }
>> +
>>       // get the remaining data from the ring buffer:
>>       na = (atempo->head < atempo->tail ?
>>             atempo->tail - atempo->head :
>> --
>> 2.35.3
>>
>>
> This is a reformatting of an earlier patch from Rajiv --
> https://ffmpeg.org/pipermail/ffmpeg-devel/2024-March/322946.html
> I've tested it locally -- looks good to me, feel free to apply and push.
>
Thanks for the review and reformatting. Would also check once on my end 
why the reformatting was required.

Committed in 4700925d22c79988688596bda8e862ef3ff39293 .

Cheers,
Rajiv