On 8/2/2018 4:22 PM, Martin Vignali wrote:
>>
>> +static int uint_y_to_float_y_wrapper(SwsContext *c, const uint8_t *src[],
>> + int srcStride[], int srcSliceY,
>> + int srcSliceH, uint8_t *dst[], int
>> dstStride[])
>> +{
>> + int y, x;
>> + int dstStrideFloat = dstStride[0] >> 2;;
>> + const uint8_t *srcPtr = src[0];
>> + float *dstPtr = (float *)(dst[0] + dstStride[0] * srcSliceY);
>> +
>> + for (y = 0; y < srcSliceH; ++y){
>> + for (x = 0; x < c->srcW; ++x){
>> + dstPtr[x] = (float)srcPtr[x] / 255.0f;
>> + }
>> + srcPtr += srcStride[0];
>> + dstPtr += dstStrideFloat;
>> + }
>> +
>> + return srcSliceH;
>> +}
>> +
>> +static int float_y_to_uint_y_wrapper(SwsContext *c, const uint8_t* src[],
>> + int srcStride[], int srcSliceY,
>> + int srcSliceH, uint8_t* dst[], int
>> dstStride[])
>> +{
>> + int y, x;
>> + int srcStrideFloat = srcStride[0] >> 2;
>> + const float *srcPtr = (const float *)src[0];
>> + uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
>> +
>> + for (y = 0; y < srcSliceH; ++y){
>> + for (x = 0; x < c->srcW; ++x){
>> + dstPtr[x] = (uint8_t)(255.0f * FFMIN(FFMAX(srcPtr[x], 0.0f),
>> 1.0f));
>> + }
>> + srcPtr += srcStrideFloat;
>> + dstPtr += dstStride[0];
>> + }
>> +
>> + return srcSliceH;
>> +}
>>
>
>
> Maybe you can avoid to use float for these conversions
> like in libavcodec/exr.c, where there is a float to uint16 conversion
>
> Martin
Unless i'm missing something, I think the point is that he was asked to
not do format conversion within the filter itself.
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