[FFmpeg-devel] [PATCH] avformat/riffenc: correct calculation for extradata size

[Gyan Doshi]

On 25-07-2020 11:00 pm, Gyan Doshi wrote:
> Will push in 12 hours.

Pushed as 93694fe777d12a9432b5ceeb564631da6311ae26
Gyan

>
> On 25-07-2020 10:44 am, Gyan Doshi wrote:
>> In 1ec2b3de5a, the extradata size was affected when the raster was
>> signaled as flipped due to user-set option rather than via extradata.
>> This resulted in a wrong header size being written. Fixed.
>> ---
>>   libavformat/riffenc.c | 8 ++++----
>>   1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/libavformat/riffenc.c b/libavformat/riffenc.c
>> index d0ee98bfcc..04a21fcffa 100644
>> --- a/libavformat/riffenc.c
>> +++ b/libavformat/riffenc.c
>> @@ -209,10 +209,10 @@ int ff_put_wav_header(AVFormatContext *s, 
>> AVIOContext *pb,
>>   void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par,
>>                          int for_asf, int ignore_extradata, int 
>> rgb_frame_is_flipped)
>>   {
>> -    int keep_height = (par->extradata_size >= 9 &&
>> -                      !memcmp(par->extradata + par->extradata_size - 
>> 9, "BottomUp", 9)) ||
>> -                      rgb_frame_is_flipped;
>> -    int extradata_size = par->extradata_size - 9*keep_height;
>> +    int flipped_extradata = (par->extradata_size >= 9 &&
>> +                            !memcmp(par->extradata + 
>> par->extradata_size - 9, "BottomUp", 9));
>> +    int keep_height = flipped_extradata || rgb_frame_is_flipped;
>> +    int extradata_size = par->extradata_size - 9*flipped_extradata;
>>       enum AVPixelFormat pix_fmt = par->format;
>>       int pal_avi;
>
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