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* [FFmpeg-devel] [PATCH] avcodec/x86/vvc/vvcdsp_init: fix linking error when configuring with --disable-ssse3 --disable-optimizations options
@ 2024-02-29 17:41 toqsxw
  2024-03-03 14:49 ` Nuo Mi
  0 siblings, 1 reply; 3+ messages in thread
From: toqsxw @ 2024-02-29 17:41 UTC (permalink / raw)
  To: ffmpeg-devel; +Cc: Wu Jianhua

From: Wu Jianhua <toqsxw@outlook.com>

Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
---
 libavcodec/x86/vvc/vvcdsp_init.c | 115 ++++++++++++++++++++++---------
 1 file changed, 82 insertions(+), 33 deletions(-)

diff --git a/libavcodec/x86/vvc/vvcdsp_init.c b/libavcodec/x86/vvc/vvcdsp_init.c
index 0d2c683f0f..9ae84bda48 100644
--- a/libavcodec/x86/vvc/vvcdsp_init.c
+++ b/libavcodec/x86/vvc/vvcdsp_init.c
@@ -31,9 +31,67 @@
 #include "libavcodec/vvc/vvcdsp.h"
 #include "libavcodec/x86/h26x/h2656dsp.h"
 
+#define PUT_PROTOTYPE(name, depth, opt) \
+void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst, const uint8_t *src, ptrdiff_t srcstride, int height, const int8_t *hf, const int8_t *vf, int width);
+
+#define PUT_PROTOTYPES(name, bitd, opt) \
+        PUT_PROTOTYPE(name##2,   bitd, opt) \
+        PUT_PROTOTYPE(name##4,   bitd, opt) \
+        PUT_PROTOTYPE(name##8,   bitd, opt) \
+        PUT_PROTOTYPE(name##12,  bitd, opt) \
+        PUT_PROTOTYPE(name##16,  bitd, opt) \
+        PUT_PROTOTYPE(name##24,  bitd, opt) \
+        PUT_PROTOTYPE(name##32,  bitd, opt) \
+        PUT_PROTOTYPE(name##48,  bitd, opt) \
+        PUT_PROTOTYPE(name##64,  bitd, opt) \
+        PUT_PROTOTYPE(name##128, bitd, opt)
+
+#define PUT_BPC_PROTOTYPES(name, opt) \
+    PUT_PROTOTYPES(name,  8, opt)     \
+    PUT_PROTOTYPES(name, 10, opt)     \
+    PUT_PROTOTYPES(name, 12, opt)
+
+#define PUT_TAP_PROTOTYPES(n, opt) \
+    PUT_BPC_PROTOTYPES(n##tap_h,  opt) \
+    PUT_BPC_PROTOTYPES(n##tap_v,  opt) \
+    PUT_BPC_PROTOTYPES(n##tap_hv, opt)
+
+PUT_BPC_PROTOTYPES(pixels, sse4)
+PUT_BPC_PROTOTYPES(pixels, avx2)
+
+PUT_TAP_PROTOTYPES(4, sse4)
+PUT_TAP_PROTOTYPES(8, sse4)
+PUT_TAP_PROTOTYPES(4, avx2)
+PUT_TAP_PROTOTYPES(8, avx2)
+
+#define bf(fn, bd,  opt) fn##_##bd##_##opt
+#define BF(fn, bpc, opt) fn##_##bpc##bpc_##opt
+
+#define AVG_BPC_PROTOTYPES(bpc, opt)                                                                 \
+void BF(ff_vvc_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                    \
+    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t height, intptr_t pixel_max);  \
+void BF(ff_vvc_w_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                  \
+    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t height,                       \
+    intptr_t denom, intptr_t w0, intptr_t w1,  intptr_t o0, intptr_t o1, intptr_t pixel_max);
+
+#define AVG_PROTOTYPES(bd, opt)                                                                      \
+void bf(ff_vvc_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                     \
+    const int16_t *src0, const int16_t *src1, int width, int height);                                \
+void bf(ff_vvc_w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                   \
+    const int16_t *src0, const int16_t *src1, int width, int height,                                 \
+    int denom, int w0, int w1, int o0, int o1);
+
+AVG_BPC_PROTOTYPES( 8, avx2)
+AVG_BPC_PROTOTYPES(16, avx2)
+
+AVG_PROTOTYPES( 8, avx2)
+AVG_PROTOTYPES(10, avx2)
+AVG_PROTOTYPES(12, avx2)
+
 #if ARCH_X86_64
+#if HAVE_SSE4_EXTERNAL
 #define FW_PUT(name, depth, opt) \
-static void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst, const uint8_t *src, ptrdiff_t srcstride, \
+void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst, const uint8_t *src, ptrdiff_t srcstride,        \
                                                  int height, const int8_t *hf, const int8_t *vf, int width)    \
 {                                                                                                              \
     ff_h2656_put_## name ## _ ## depth ## _##opt(dst, 2 * MAX_PB_SIZE, src, srcstride, height, hf, vf, width); \
@@ -69,7 +127,9 @@ static void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst, const uint
 FW_PUT_SSE4( 8)
 FW_PUT_SSE4(10)
 FW_PUT_SSE4(12)
+#endif
 
+#if HAVE_AVX2_EXTERNAL
 #define FW_PUT_TAP_AVX2(n, bitd)        \
     FW_PUT(n ## tap_h32,   bitd, avx2)  \
     FW_PUT(n ## tap_h64,   bitd, avx2)  \
@@ -105,6 +165,25 @@ FW_PUT_AVX2(12)
 FW_PUT_16BPC_AVX2(10)
 FW_PUT_16BPC_AVX2(12)
 
+#define AVG_FUNCS(bpc, bd, opt)                                                                     \
+void bf(ff_vvc_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                    \
+    const int16_t *src0, const int16_t *src1, int width, int height)                                \
+{                                                                                                   \
+    BF(ff_vvc_avg, bpc, opt)(dst, dst_stride, src0, src1, width, height, (1 << bd)  - 1);           \
+}                                                                                                   \
+void bf(ff_vvc_w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                  \
+    const int16_t *src0, const int16_t *src1, int width, int height,                                \
+    int denom, int w0, int w1, int o0, int o1)                                                      \
+{                                                                                                   \
+    BF(ff_vvc_w_avg, bpc, opt)(dst, dst_stride, src0, src1, width, height,                          \
+        denom, w0, w1, o0, o1, (1 << bd)  - 1);                                                     \
+}
+
+AVG_FUNCS(8,  8,  avx2)
+AVG_FUNCS(16, 10, avx2)
+AVG_FUNCS(16, 12, avx2)
+#endif
+
 #define PEL_LINK(dst, C, W, idx1, idx2, name, D, opt)                              \
     dst[C][W][idx1][idx2] = ff_vvc_put_## name ## _ ## D ## _##opt;                \
     dst ## _uni[C][W][idx1][idx2] = ff_h2656_put_uni_ ## name ## _ ## D ## _##opt; \
@@ -170,40 +249,10 @@ FW_PUT_16BPC_AVX2(12)
     MC_TAP_LINKS_16BPC_AVX2(LUMA,   8, bd);                          \
     MC_TAP_LINKS_16BPC_AVX2(CHROMA, 4, bd);
 
-#define bf(fn, bd,  opt) fn##_##bd##_##opt
-#define BF(fn, bpc, opt) fn##_##bpc##bpc_##opt
-
-#define AVG_BPC_FUNC(bpc, opt)                                                                      \
-void BF(ff_vvc_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                   \
-    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t height, intptr_t pixel_max); \
-void BF(ff_vvc_w_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                 \
-    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t height,                      \
-    intptr_t denom, intptr_t w0, intptr_t w1,  intptr_t o0, intptr_t o1, intptr_t pixel_max);
-
-#define AVG_FUNCS(bpc, bd, opt)                                                                     \
-static void bf(avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                    \
-    const int16_t *src0, const int16_t *src1, int width, int height)                                \
-{                                                                                                   \
-    BF(ff_vvc_avg, bpc, opt)(dst, dst_stride, src0, src1, width, height, (1 << bd)  - 1);           \
-}                                                                                                   \
-static void bf(w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,                                  \
-    const int16_t *src0, const int16_t *src1, int width, int height,                                \
-    int denom, int w0, int w1, int o0, int o1)                                                      \
-{                                                                                                   \
-    BF(ff_vvc_w_avg, bpc, opt)(dst, dst_stride, src0, src1, width, height,                          \
-        denom, w0, w1, o0, o1, (1 << bd)  - 1);                                                     \
-}
-
-AVG_BPC_FUNC(8,   avx2)
-AVG_BPC_FUNC(16,  avx2)
-
-AVG_FUNCS(8,  8,  avx2)
-AVG_FUNCS(16, 10, avx2)
-AVG_FUNCS(16, 12, avx2)
 
 #define AVG_INIT(bd, opt) do {                                          \
-    c->inter.avg    = bf(avg, bd, opt);                                 \
-    c->inter.w_avg  = bf(w_avg, bd, opt);                               \
+    c->inter.avg    = bf(ff_vvc_avg, bd, opt);                          \
+    c->inter.w_avg  = bf(ff_vvc_w_avg, bd, opt);                        \
 } while (0)
 #endif
 
-- 
2.33.0.windows.2

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^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [FFmpeg-devel] [PATCH] avcodec/x86/vvc/vvcdsp_init: fix linking error when configuring with --disable-ssse3 --disable-optimizations options
  2024-02-29 17:41 [FFmpeg-devel] [PATCH] avcodec/x86/vvc/vvcdsp_init: fix linking error when configuring with --disable-ssse3 --disable-optimizations options toqsxw
@ 2024-03-03 14:49 ` Nuo Mi
  2024-04-15 17:47   ` [FFmpeg-devel] 回复: " Wu Jianhua
  0 siblings, 1 reply; 3+ messages in thread
From: Nuo Mi @ 2024-03-03 14:49 UTC (permalink / raw)
  To: FFmpeg development discussions and patches; +Cc: Wu Jianhua

Thank you, Jianhua.
This patch mixes many things.
Could you help split it into smaller, more atomic patches?
For example, one for moving code blocks and another for fixing
--disable-ssse3.

On Fri, Mar 1, 2024 at 1:42 AM <toqsxw@outlook.com> wrote:

> From: Wu Jianhua <toqsxw@outlook.com>
>
> Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
> ---
>  libavcodec/x86/vvc/vvcdsp_init.c | 115 ++++++++++++++++++++++---------
>  1 file changed, 82 insertions(+), 33 deletions(-)
>
> diff --git a/libavcodec/x86/vvc/vvcdsp_init.c
> b/libavcodec/x86/vvc/vvcdsp_init.c
> index 0d2c683f0f..9ae84bda48 100644
> --- a/libavcodec/x86/vvc/vvcdsp_init.c
> +++ b/libavcodec/x86/vvc/vvcdsp_init.c
> @@ -31,9 +31,67 @@
>  #include "libavcodec/vvc/vvcdsp.h"
>  #include "libavcodec/x86/h26x/h2656dsp.h"
>
> +#define PUT_PROTOTYPE(name, depth, opt) \
> +void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst, const
> uint8_t *src, ptrdiff_t srcstride, int height, const int8_t *hf, const
> int8_t *vf, int width);
> +
> +#define PUT_PROTOTYPES(name, bitd, opt) \
> +        PUT_PROTOTYPE(name##2,   bitd, opt) \
> +        PUT_PROTOTYPE(name##4,   bitd, opt) \
> +        PUT_PROTOTYPE(name##8,   bitd, opt) \
> +        PUT_PROTOTYPE(name##12,  bitd, opt) \
> +        PUT_PROTOTYPE(name##16,  bitd, opt) \
> +        PUT_PROTOTYPE(name##24,  bitd, opt) \
> +        PUT_PROTOTYPE(name##32,  bitd, opt) \
> +        PUT_PROTOTYPE(name##48,  bitd, opt) \
> +        PUT_PROTOTYPE(name##64,  bitd, opt) \
> +        PUT_PROTOTYPE(name##128, bitd, opt)
> +
> +#define PUT_BPC_PROTOTYPES(name, opt) \
> +    PUT_PROTOTYPES(name,  8, opt)     \
> +    PUT_PROTOTYPES(name, 10, opt)     \
> +    PUT_PROTOTYPES(name, 12, opt)
> +
> +#define PUT_TAP_PROTOTYPES(n, opt) \
> +    PUT_BPC_PROTOTYPES(n##tap_h,  opt) \
> +    PUT_BPC_PROTOTYPES(n##tap_v,  opt) \
> +    PUT_BPC_PROTOTYPES(n##tap_hv, opt)
> +
> +PUT_BPC_PROTOTYPES(pixels, sse4)
> +PUT_BPC_PROTOTYPES(pixels, avx2)
> +
> +PUT_TAP_PROTOTYPES(4, sse4)
> +PUT_TAP_PROTOTYPES(8, sse4)
> +PUT_TAP_PROTOTYPES(4, avx2)
> +PUT_TAP_PROTOTYPES(8, avx2)
> +
> +#define bf(fn, bd,  opt) fn##_##bd##_##opt
> +#define BF(fn, bpc, opt) fn##_##bpc##bpc_##opt
> +
> +#define AVG_BPC_PROTOTYPES(bpc, opt)
>                            \
> +void BF(ff_vvc_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                             \
> +    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t
> height, intptr_t pixel_max);  \
> +void BF(ff_vvc_w_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                             \
> +    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t
> height,                       \
> +    intptr_t denom, intptr_t w0, intptr_t w1,  intptr_t o0, intptr_t o1,
> intptr_t pixel_max);
> +
> +#define AVG_PROTOTYPES(bd, opt)
>                             \
> +void bf(ff_vvc_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                            \
> +    const int16_t *src0, const int16_t *src1, int width, int height);
>                             \
> +void bf(ff_vvc_w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                            \
> +    const int16_t *src0, const int16_t *src1, int width, int height,
>                            \
> +    int denom, int w0, int w1, int o0, int o1);
> +
> +AVG_BPC_PROTOTYPES( 8, avx2)
> +AVG_BPC_PROTOTYPES(16, avx2)
> +
> +AVG_PROTOTYPES( 8, avx2)
> +AVG_PROTOTYPES(10, avx2)
> +AVG_PROTOTYPES(12, avx2)
> +
>  #if ARCH_X86_64
> +#if HAVE_SSE4_EXTERNAL
>  #define FW_PUT(name, depth, opt) \
> -static void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst,
> const uint8_t *src, ptrdiff_t srcstride, \
> +void ff_vvc_put_ ## name ## _ ## depth ## _##opt(int16_t *dst, const
> uint8_t *src, ptrdiff_t srcstride,        \
>                                                   int height, const int8_t
> *hf, const int8_t *vf, int width)    \
>  {
>                                       \
>      ff_h2656_put_## name ## _ ## depth ## _##opt(dst, 2 * MAX_PB_SIZE,
> src, srcstride, height, hf, vf, width); \
> @@ -69,7 +127,9 @@ static void ff_vvc_put_ ## name ## _ ## depth ##
> _##opt(int16_t *dst, const uint
>  FW_PUT_SSE4( 8)
>  FW_PUT_SSE4(10)
>  FW_PUT_SSE4(12)
> +#endif
>
> +#if HAVE_AVX2_EXTERNAL
>  #define FW_PUT_TAP_AVX2(n, bitd)        \
>      FW_PUT(n ## tap_h32,   bitd, avx2)  \
>      FW_PUT(n ## tap_h64,   bitd, avx2)  \
> @@ -105,6 +165,25 @@ FW_PUT_AVX2(12)
>  FW_PUT_16BPC_AVX2(10)
>  FW_PUT_16BPC_AVX2(12)
>
> +#define AVG_FUNCS(bpc, bd, opt)
>                            \
> +void bf(ff_vvc_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                           \
> +    const int16_t *src0, const int16_t *src1, int width, int height)
>                           \
> +{
>                            \
> +    BF(ff_vvc_avg, bpc, opt)(dst, dst_stride, src0, src1, width, height,
> (1 << bd)  - 1);           \
> +}
>                            \
> +void bf(ff_vvc_w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                           \
> +    const int16_t *src0, const int16_t *src1, int width, int height,
>                           \
> +    int denom, int w0, int w1, int o0, int o1)
>                           \
> +{
>                            \
> +    BF(ff_vvc_w_avg, bpc, opt)(dst, dst_stride, src0, src1, width,
> height,                          \
> +        denom, w0, w1, o0, o1, (1 << bd)  - 1);
>                            \
> +}
> +
> +AVG_FUNCS(8,  8,  avx2)
> +AVG_FUNCS(16, 10, avx2)
> +AVG_FUNCS(16, 12, avx2)
> +#endif
> +
>  #define PEL_LINK(dst, C, W, idx1, idx2, name, D, opt)
>           \
>      dst[C][W][idx1][idx2] = ff_vvc_put_## name ## _ ## D ## _##opt;
>           \
>      dst ## _uni[C][W][idx1][idx2] = ff_h2656_put_uni_ ## name ## _ ## D
> ## _##opt; \
> @@ -170,40 +249,10 @@ FW_PUT_16BPC_AVX2(12)
>      MC_TAP_LINKS_16BPC_AVX2(LUMA,   8, bd);                          \
>      MC_TAP_LINKS_16BPC_AVX2(CHROMA, 4, bd);
>
> -#define bf(fn, bd,  opt) fn##_##bd##_##opt
> -#define BF(fn, bpc, opt) fn##_##bpc##bpc_##opt
> -
> -#define AVG_BPC_FUNC(bpc, opt)
>                           \
> -void BF(ff_vvc_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                            \
> -    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t
> height, intptr_t pixel_max); \
> -void BF(ff_vvc_w_avg, bpc, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                            \
> -    const int16_t *src0, const int16_t *src1, intptr_t width, intptr_t
> height,                      \
> -    intptr_t denom, intptr_t w0, intptr_t w1,  intptr_t o0, intptr_t o1,
> intptr_t pixel_max);
> -
> -#define AVG_FUNCS(bpc, bd, opt)
>                            \
> -static void bf(avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                           \
> -    const int16_t *src0, const int16_t *src1, int width, int height)
>                           \
> -{
>                            \
> -    BF(ff_vvc_avg, bpc, opt)(dst, dst_stride, src0, src1, width, height,
> (1 << bd)  - 1);           \
> -}
>                            \
> -static void bf(w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
>                           \
> -    const int16_t *src0, const int16_t *src1, int width, int height,
>                           \
> -    int denom, int w0, int w1, int o0, int o1)
>                           \
> -{
>                            \
> -    BF(ff_vvc_w_avg, bpc, opt)(dst, dst_stride, src0, src1, width,
> height,                          \
> -        denom, w0, w1, o0, o1, (1 << bd)  - 1);
>                            \
> -}
> -
> -AVG_BPC_FUNC(8,   avx2)
> -AVG_BPC_FUNC(16,  avx2)
> -
> -AVG_FUNCS(8,  8,  avx2)
> -AVG_FUNCS(16, 10, avx2)
> -AVG_FUNCS(16, 12, avx2)
>
>  #define AVG_INIT(bd, opt) do {                                          \
> -    c->inter.avg    = bf(avg, bd, opt);                                 \
> -    c->inter.w_avg  = bf(w_avg, bd, opt);                               \
> +    c->inter.avg    = bf(ff_vvc_avg, bd, opt);                          \
> +    c->inter.w_avg  = bf(ff_vvc_w_avg, bd, opt);                        \
>
Why change the function scope to fix a compilation issue?

>  } while (0)
>  #endif
>
> --
> 2.33.0.windows.2
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
>
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^ permalink raw reply	[flat|nested] 3+ messages in thread

* [FFmpeg-devel] 回复:  [PATCH] avcodec/x86/vvc/vvcdsp_init: fix linking error when configuring with --disable-ssse3 --disable-optimizations options
  2024-03-03 14:49 ` Nuo Mi
@ 2024-04-15 17:47   ` Wu Jianhua
  0 siblings, 0 replies; 3+ messages in thread
From: Wu Jianhua @ 2024-04-15 17:47 UTC (permalink / raw)
  To: Nuo Mi, FFmpeg development discussions and patches

> 发件人: Nuo Mi <nuomi2021@gmail.com>
> 发送时间: 2024年3月3日 6:49
> 收件人: FFmpeg development discussions and patches
> 抄送: Wu Jianhua
> 主题: Re: [FFmpeg-devel] [PATCH] avcodec/x86/vvc/vvcdsp_init: fix linking error when configuring with --disable-> > ssse3 --disable-optimizations options
> 
> Thank you, Jianhua.
> This patch mixes many things.
> Could you help split it into smaller, more atomic patches?
> For example, one for moving code blocks and another for fixing --disable-ssse3.
> 

Sure. I sent the v2.

>  #define AVG_INIT(bd, opt) do {                                          \
> -    c->inter.avg    = bf(avg, bd, opt);                                 \
> -    c->inter.w_avg  = bf(w_avg, bd, opt);                               \
> +    c->inter.avg    = bf(ff_vvc_avg, bd, opt);                          \
> +    c->inter.w_avg  = bf(ff_vvc_w_avg, bd, opt);                        \
> Why change the function scope to fix a compilation issue?

I use the same way that adds prototypes for the functions as HEVC DSP. Hence, the functions
cannot be declared with static and need the prefix to avoid naming conflict.



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^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2024-04-15 17:47 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-02-29 17:41 [FFmpeg-devel] [PATCH] avcodec/x86/vvc/vvcdsp_init: fix linking error when configuring with --disable-ssse3 --disable-optimizations options toqsxw
2024-03-03 14:49 ` Nuo Mi
2024-04-15 17:47   ` [FFmpeg-devel] 回复: " Wu Jianhua

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