[FFmpeg-devel] [PATCH]lavc/pcm-bluray: Do not use incompatible pointers on big-endian.

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Nov 4 21:33:54 EET 2017


2017-11-01 19:01 GMT+01:00 Carl Eugen Hoyos <ceffmpeg at gmail.com>:
> 2017-11-01 18:31 GMT+01:00 Hendrik Leppkes <h.leppkes at gmail.com>:
>> On Wed, Nov 1, 2017 at 6:25 PM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>>> 2017-11-01 18:16 GMT+01:00 Hendrik Leppkes <h.leppkes at gmail.com>:
>>>> On Wed, Nov 1, 2017 at 5:16 PM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>>>>> Hi!
>>>>>
>>>>> Attached patch silences two gcc warnings, no sample for odd channel count found.
>>>>>
>>>>>  #if HAVE_BIGENDIAN
>>>>> -                    bytestream2_get_buffer(&gb, dst16, avctx->channels * 2);
>>>>> -                    dst16 += avctx->channels;
>>>>> +                    uint8_t *dst = frame->data[0];
>>>>> +                    bytestream2_get_buffer(&gb, frame->data[0], avctx->channels * 2);
>>>>> +                    dst += avctx->channels * 2;
>>>>>  #else
>>>>>                      channel = avctx->channels;
>>>>>                      do {
>>>>
>>>> This hunk seems fishy. dst is only ever set, never read, and this code
>>>> is executed in a loop but always writes to the same position.
>>>
>>> I had sent the wrong version, please review this one.
>>
>> That still won't work, dst is declared within the loop, so its reset
>> back to the start at the beginning of the frame each iteration.
>
> New try attached.

Ping.

Thank you, Carl Eugen


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