2018-11-27 0:17 GMT+01:00, Carl Eugen Hoyos <ceffm...@gmail.com>:
> 2018-11-17 9:12 GMT+01:00, Lauri Kasanen <c...@gmx.com>:
>> ./ffmpeg_g -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt
>> yuv420p \
>> -f null -vframes 100 -v error -nostats -
>>
>> 1158 UNITS in planar1, 65528 runs, 8 skips
>>
>> -cpuflags 0
>>
>> 19082 UNITS in planar1, 65533 runs, 3 skips
>>
>> 16.48 speedup ratio. On x86, SSE2 is ~7. Curiously, the Power C version
>> takes as many cycles as the x86 SSE2 version, yikes it's fast.
>>
>> Note that this function uses VSX instructions, but is not marked so.
>> This is because several existing functions also make that mistake.
>> I'll submit a patch moving them once this is reviewed.
>>
>> v2: Remove !BE check
>> Signed-off-by: Lauri Kasanen <c...@gmx.com>
>> ---
>> libswscale/ppc/swscale_altivec.c | 53
>> ++++++++++++++++++++++++++++++++++++++++
>> 1 file changed, 53 insertions(+)
>>
>> diff --git a/libswscale/ppc/swscale_altivec.c
>> b/libswscale/ppc/swscale_altivec.c
>> index 2fb2337..8c6056d 100644
>> --- a/libswscale/ppc/swscale_altivec.c
>> +++ b/libswscale/ppc/swscale_altivec.c
>> @@ -324,6 +324,53 @@ static void hScale_altivec_real(SwsContext *c,
>> int16_t
>> *dst, int dstW,
>> }
>> }
>> }
>> +
>> +static void yuv2plane1_8_u(const int16_t *src, uint8_t *dest, int dstW,
>> + const uint8_t *dither, int offset, int start)
>> +{
>> + int i;
>> + for (i = start; i < dstW; i++) {
>> + int val = (src[i] + dither[(i + offset) & 7]) >> 7;
>> + dest[i] = av_clip_uint8(val);
>> + }
>> +}
>> +
>> +static void yuv2plane1_8_altivec(const int16_t *src, uint8_t *dest, int
>> dstW,
>> + const uint8_t *dither, int offset)
>> +{
>> + const int dst_u = -(uintptr_t)dest & 15;
>> + int i, j;
>> + LOCAL_ALIGNED(16, int16_t, val, [16]);
>
>> + const vector uint16_t shifts = (vector uint16_t) {7, 7, 7, 7, 7, 7,
>> 7,
>> 7};
>
> The patch breaks compilation with xlc, sorry for not testing earlier:
> libswscale/ppc/swscale_altivec.c:344:11: error: unknown type name 'vector'
> const vector uint16_t shifts = (vector uint16_t) {7, 7, 7, 7, 7, 7, 7, 7};
In case this error does not make much sense to you, don't worry too
much, the following change was necessary to make xlc pass rv20-1239:
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 6518d50..fb749c5 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -744,6 +744,7 @@ static int configure_input_video_filter
InputFile *f = input_files[ist->file_index];
AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
ist->st->time_base;
+if(!ist->framerate.num)tb = ist->st->time_base;
AVRational fr = ist->framerate;
AVRational sar;
AVBPrint args;
;-)
(As expected, other tests also fail.)
Carl Eugen
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