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From: Lynne <dev@lynne.ee>
To: ffmpeg-devel@ffmpeg.org
Date: Thu, 13 Mar 2025 18:03:43 +0100
Message-ID: <20250313170355.92290-12-dev@lynne.ee>
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Subject: [FFmpeg-devel] [PATCH v4 11/16] vulkan: unify handling of BGR and
simplify ffv1_rct
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---
libavcodec/ffv1_vulkan.h | 1 +
libavcodec/ffv1enc_vulkan.c | 2 ++
libavcodec/vulkan/ffv1_enc_rct.comp | 17 ++++++-------
libavutil/vulkan.c | 38 +++++++++++++++++++++++++++++
libavutil/vulkan.h | 6 +++++
5 files changed, 54 insertions(+), 10 deletions(-)
diff --git a/libavcodec/ffv1_vulkan.h b/libavcodec/ffv1_vulkan.h
index 0da6dc2d33..599afae66e 100644
--- a/libavcodec/ffv1_vulkan.h
+++ b/libavcodec/ffv1_vulkan.h
@@ -37,6 +37,7 @@ int ff_ffv1_vk_init_crc_table_data(FFVulkanContext *s,
FFVkBuffer *vkb, FFV1Context *f);
typedef struct FFv1VkRCTParameters {
+ int fmt_lut[4];
int offset;
uint8_t bits;
uint8_t planar_rgb;
diff --git a/libavcodec/ffv1enc_vulkan.c b/libavcodec/ffv1enc_vulkan.c
index 17a93834f3..f8fe3bec1a 100644
--- a/libavcodec/ffv1enc_vulkan.c
+++ b/libavcodec/ffv1enc_vulkan.c
@@ -264,6 +264,7 @@ static int run_rct(AVCodecContext *avctx, FFVkExecContext *exec,
(ff_vk_count_images((AVVkFrame *)enc_in->data[0]) > 1),
.transparency = f->transparency,
};
+ ff_vk_set_perm(src_hwfc->sw_format, pd.fmt_lut);
ff_vk_shader_update_push_const(&fv->s, exec, &fv->rct,
VK_SHADER_STAGE_COMPUTE_BIT,
0, sizeof(pd), &pd);
@@ -1157,6 +1158,7 @@ static int init_rct_shader(AVCodecContext *avctx, FFVkSPIRVCompiler *spv)
GLSLD(ff_source_common_comp);
GLSLC(0, layout(push_constant, scalar) uniform pushConstants { );
+ GLSLC(1, ivec4 fmt_lut; );
GLSLC(1, int offset; );
GLSLC(1, uint8_t bits; );
GLSLC(1, uint8_t planar_rgb; );
diff --git a/libavcodec/vulkan/ffv1_enc_rct.comp b/libavcodec/vulkan/ffv1_enc_rct.comp
index a615381c90..b611f4be98 100644
--- a/libavcodec/vulkan/ffv1_enc_rct.comp
+++ b/libavcodec/vulkan/ffv1_enc_rct.comp
@@ -22,17 +22,14 @@
ivec4 load_components(ivec2 pos)
{
- if (planar_rgb == 0)
- return ivec4(imageLoad(src[0], pos));
+ ivec4 pix = ivec4(imageLoad(src[0], pos));
+ if (planar_rgb != 0) {
+ for (int i = 1; i < (3 + transparency); i++)
+ pix[i] = int(imageLoad(src[i], pos)[0]);
+ }
- ivec4 pix;
- for (int i = 0; i < (3 + transparency); i++)
- pix[i] = int(imageLoad(src[i], pos)[0]);
-
- /* Swizzle out the difference */
- if (bits > 8 && bits < 16 && transparency == 0)
- return pix.bgra;
- return pix.brga;
+ return ivec4(pix[fmt_lut[0]], pix[fmt_lut[1]],
+ pix[fmt_lut[2]], pix[fmt_lut[3]]);
}
void bypass_sample(ivec2 pos)
diff --git a/libavutil/vulkan.c b/libavutil/vulkan.c
index e517a42b86..b7cdc3a086 100644
--- a/libavutil/vulkan.c
+++ b/libavutil/vulkan.c
@@ -1451,6 +1451,44 @@ int ff_vk_mt_is_np_rgb(enum AVPixelFormat pix_fmt)
return 0;
}
+void ff_vk_set_perm(enum AVPixelFormat pix_fmt, int lut[4])
+{
+ switch (pix_fmt) {
+ case AV_PIX_FMT_BGRA:
+ case AV_PIX_FMT_BGR0:
+ case AV_PIX_FMT_BGR565:
+ case AV_PIX_FMT_X2BGR10:
+ lut[0] = 2;
+ lut[1] = 1;
+ lut[2] = 0;
+ lut[3] = 3;
+ return;
+ case AV_PIX_FMT_GBRAP:
+ case AV_PIX_FMT_GBRP:
+ case AV_PIX_FMT_GBRAP10:
+ case AV_PIX_FMT_GBRAP12:
+ case AV_PIX_FMT_GBRAP14:
+ case AV_PIX_FMT_GBRAP16:
+ case AV_PIX_FMT_GBRP10:
+ case AV_PIX_FMT_GBRP12:
+ case AV_PIX_FMT_GBRP14:
+ case AV_PIX_FMT_GBRP16:
+ case AV_PIX_FMT_GBRPF32:
+ case AV_PIX_FMT_GBRAPF32:
+ lut[0] = 1;
+ lut[1] = 0;
+ lut[2] = 2;
+ lut[3] = 3;
+ return;
+ default:
+ lut[0] = 0;
+ lut[1] = 1;
+ lut[2] = 2;
+ lut[3] = 3;
+ return;
+ }
+}
+
const char *ff_vk_shader_rep_fmt(enum AVPixelFormat pix_fmt,
enum FFVkShaderRepFormat rep_fmt)
{
diff --git a/libavutil/vulkan.h b/libavutil/vulkan.h
index 29249fe95d..ef2c2fe4a2 100644
--- a/libavutil/vulkan.h
+++ b/libavutil/vulkan.h
@@ -371,6 +371,12 @@ const char *ff_vk_ret2str(VkResult res);
*/
int ff_vk_mt_is_np_rgb(enum AVPixelFormat pix_fmt);
+/**
+ * Since storage images may not be swizzled, we have to do this in the
+ * shader itself. This fills in a lookup table to do it.
+ */
+void ff_vk_set_perm(enum AVPixelFormat pix_fmt, int lut[4]);
+
/**
* Get the aspect flag for a plane from an image.
*/
--
2.47.2
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