[FFmpeg-devel] need help fixing sws on PPC
Vitor Sessak
vitor1001
Wed Oct 8 21:42:39 CEST 2008
Michael Niedermayer escreveu:
> On Wed, Oct 08, 2008 at 08:16:46PM +0200, Vitor Sessak wrote:
>> Michael Niedermayer escreveu:
>>> On Tue, Oct 07, 2008 at 11:26:40PM +0200, Vitor Sessak wrote:
>>>
>>>> Michael Niedermayer escreveu:
>>>>
>>>>> On Tue, Oct 07, 2008 at 10:36:51PM +0200, Vitor Sessak wrote:
>>>>>
>>>>>> Michael Niedermayer escreveu:
>>>>>>
>>>>>>> On Tue, Oct 07, 2008 at 09:24:26PM +0200, Vitor Sessak wrote:
>>>>>>>
>>>>>>>> Michael Niedermayer escreveu:
>>>>>>>>
>>>>>>>>> On Mon, Oct 06, 2008 at 09:42:56PM +0200, Vitor Sessak wrote:
>>>>>>>>>
>>>>>>>>>> Michael Niedermayer escreveu:
>>>>>>>>>>
>>>>>>>>>>> On Wed, Sep 10, 2008 at 01:42:44PM +0200, Vitor Sessak wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Michael Niedermayer escreveu:
>>>>>>>>>>>>
>>>>> [...]
>>>>>
>>>>>>> [...]
>>>>>>>
>>>>>>>> @@ -2658,12 +2705,7 @@
>>>>>>>> int srcSliceH, uint8_t* dst[], int dstStride[]){
>>>>>>>> int i;
>>>>>>>> uint8_t* src2[4]= {src[0], src[1], src[2]};
>>>>>>>> - uint32_t pal[256];
>>>>>>>> - int use_pal= c->srcFormat == PIX_FMT_PAL8
>>>>>>>> - || c->srcFormat == PIX_FMT_BGR4_BYTE
>>>>>>>> - || c->srcFormat == PIX_FMT_RGB4_BYTE
>>>>>>>> - || c->srcFormat == PIX_FMT_BGR8
>>>>>>>> - || c->srcFormat == PIX_FMT_RGB8;
>>>>>>>> + uint32_t pal[512];
>>>>>>>>
>>>>>>> what about putting a rgbpal and yuvpal in the context?
>>>>>>> i think this would be cleaner than the "didnt you know the rgb pal was
>>>>>>> at pal+256?!"
>>>>>>>
>>>>>> I agree. New patch attached.
>>>>>>
>>>>>> I've also attached a second patch to use pal_yuv instead of src[1] that
>>>>>> is completely untested for the moment (I will obviously not apply
>>>>>> anything before doing a full test)...
>>>>>>
>>>>> [...]
>>>>>
>>>>>
>>>>>> @@ -1711,6 +1718,39 @@
>>>>>> return srcSliceH;
>>>>>> }
>>>>>> +static int pal2rgbWrapper(SwsContext *c, uint8_t* src[], int
>>>>>> srcStride[], int srcSliceY,
>>>>>> + int srcSliceH, uint8_t* dst[], int
>>>>>> dstStride[]){
>>>>>> + const int srcFormat= c->srcFormat;
>>>>>> + const int dstFormat= c->dstFormat;
>>>>>> + void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,
>>>>>> + const uint8_t *palette)=NULL;
>>>>>>
>>>>> tabs ...
>>>>>
>>>> Ok, tab-less version attached.
>>>>
>>>>
>>>>> [...]
>>>>>
>>>>>> @@ -2701,9 +2742,10 @@
>>>>>> y= av_clip_uint8((RY*r + GY*g + BY*b + (
>>>>>> 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
>>>>>> u= av_clip_uint8((RU*r + GU*g + BU*b +
>>>>>> (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
>>>>>> v= av_clip_uint8((RV*r + GV*g + BV*b +
>>>>>> (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
>>>>>> - pal[i]= y + (u<<8) + (v<<16);
>>>>>>
>>>>>
>>>>>> + c->pal_yuv[i]= y + (u<<8) + (v<<16);
>>>>>> + c->pal_rgb[i]= b | (g<<8) | (r<<16);
>>>>>>
>>>>> is there any reason why one uses + and one | ?
>>>>>
>>>> none. Changed to both "+"
>>>>
>>>>
>>>>> [...]
>>>>>
>>>>>> Index: libswscale/swscale_template.c
>>>>>> ===================================================================
>>>>>> --- libswscale/swscale_template.c (revis?o 27716)
>>>>>> +++ libswscale/swscale_template.c (c?pia de trabalho)
>>>>>> @@ -2926,7 +2926,7 @@
>>>>>> const int chrSrcSliceY= srcSliceY >> c->chrSrcVSubSample;
>>>>>> const int chrSrcSliceH= -((-srcSliceH) >> c->chrSrcVSubSample);
>>>>>> int lastDstY;
>>>>>> - uint32_t *pal=NULL;
>>>>>> + uint32_t *pal=c->pal_yuv;
>>>>>>
>>>>> if the cde is changed to use pal_yuv then the src2[1] setting stuff
>>>>> becomes
>>>>> unneded
>>>>>
>>>> Done too.
>>>>
>>> looks ok if it passes the tests ...
>>>
>> Applied. One more small tested simplification attached.
>
> iam mildly against this one, the code is wrong after the patch it just
> works as the changed variables is not used.
The point was also to prevent new code to read the palette from src[1],
since now it is much cleaner to read it from c->pal_yuv.
-Vitor
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