Ping!
On Thu, Feb 17, 2022 at 11:04 AM Alan Kelly <alanke...@google.com> wrote:
> ff_shuffle_filter_coefficients shuffles the tail as required.
> ---
> libswscale/utils.c | 19 ++++++++++++++++---
> libswscale/x86/swscale.c | 6 ++----
> 2 files changed, 18 insertions(+), 7 deletions(-)
>
> diff --git a/libswscale/utils.c b/libswscale/utils.c
> index 7c8e1bbdde..d818c9ce55 100644
> --- a/libswscale/utils.c
> +++ b/libswscale/utils.c
> @@ -285,8 +285,7 @@ int ff_shuffle_filter_coefficients(SwsContext *c, int
> *filterPos,
> #if ARCH_X86_64
> int i, j, k;
> int cpu_flags = av_get_cpu_flags();
> - // avx2 hscale filter processes 16 pixel blocks.
> - if (!filter || dstW % 16 != 0)
> + if (!filter)
> return 0;
> if (EXTERNAL_AVX2_FAST(cpu_flags) && !(cpu_flags &
> AV_CPU_FLAG_SLOW_GATHER)) {
> if ((c->srcBpc == 8) && (c->dstBpc <= 14)) {
> @@ -298,9 +297,11 @@ int ff_shuffle_filter_coefficients(SwsContext *c, int
> *filterPos,
> }
> // Do not swap filterPos for pixels which won't be processed by
> // the main loop.
> - for (i = 0; i + 8 <= dstW; i += 8) {
> + for (i = 0; i + 16 <= dstW; i += 16) {
> FFSWAP(int, filterPos[i + 2], filterPos[i + 4]);
> FFSWAP(int, filterPos[i + 3], filterPos[i + 5]);
> + FFSWAP(int, filterPos[i + 10], filterPos[i + 12]);
> + FFSWAP(int, filterPos[i + 11], filterPos[i + 13]);
> }
> if (filterSize > 4) {
> // 16 pixels are processed at a time.
> @@ -314,6 +315,18 @@ int ff_shuffle_filter_coefficients(SwsContext *c, int
> *filterPos,
> }
> }
> }
> + // 4 pixels are processed at a time in the tail.
> + for (; i < dstW; i += 4) {
> + // 4 filter coeffs are processed at a time.
> + int rem = dstW - i >= 4 ? 4 : dstW - i;
> + for (k = 0; k + 4 <= filterSize; k += 4) {
> + for (j = 0; j < rem; ++j) {
> + int from = (i + j) * filterSize + k;
> + int to = i * filterSize + j * 4 + k * 4;
> + memcpy(&filter[to], &filterCopy[from], 4 *
> sizeof(int16_t));
> + }
> + }
> + }
> }
> av_free(filterCopy);
> }
> diff --git a/libswscale/x86/swscale.c b/libswscale/x86/swscale.c
> index 73869355b8..76f5a70fc5 100644
> --- a/libswscale/x86/swscale.c
> +++ b/libswscale/x86/swscale.c
> @@ -691,10 +691,8 @@ switch(c->dstBpc){ \
>
> if (EXTERNAL_AVX2_FAST(cpu_flags) && !(cpu_flags &
> AV_CPU_FLAG_SLOW_GATHER)) {
> if ((c->srcBpc == 8) && (c->dstBpc <= 14)) {
> - if (c->chrDstW % 16 == 0)
> - ASSIGN_AVX2_SCALE_FUNC(c->hcScale, c->hChrFilterSize);
> - if (c->dstW % 16 == 0)
> - ASSIGN_AVX2_SCALE_FUNC(c->hyScale, c->hLumFilterSize);
> + ASSIGN_AVX2_SCALE_FUNC(c->hcScale, c->hChrFilterSize);
> + ASSIGN_AVX2_SCALE_FUNC(c->hyScale, c->hLumFilterSize);
> }
> }
>
> --
> 2.35.1.265.g69c8d7142f-goog
>
>
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