From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>
---
 vendor/jpeg-decoder/src/arch/mod.rs | 46 +++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 vendor/jpeg-decoder/src/arch/mod.rs

(limited to 'vendor/jpeg-decoder/src/arch/mod.rs')

diff --git a/vendor/jpeg-decoder/src/arch/mod.rs b/vendor/jpeg-decoder/src/arch/mod.rs
new file mode 100644
index 0000000..15b46c5
--- /dev/null
+++ b/vendor/jpeg-decoder/src/arch/mod.rs
@@ -0,0 +1,46 @@
+#![allow(unsafe_code)]
+
+mod neon;
+mod ssse3;
+
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+use std::is_x86_feature_detected;
+
+/// Arch-specific implementation of YCbCr conversion. Returns the number of pixels that were
+/// converted.
+pub fn get_color_convert_line_ycbcr() -> Option<unsafe fn(&[u8], &[u8], &[u8], &mut [u8]) -> usize>
+{
+    #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+    #[allow(unsafe_code)]
+    {
+        if is_x86_feature_detected!("ssse3") {
+            return Some(ssse3::color_convert_line_ycbcr);
+        }
+    }
+    // Runtime detection is not needed on aarch64.
+    #[cfg(all(feature = "nightly_aarch64_neon", target_arch = "aarch64"))]
+    {
+        return Some(neon::color_convert_line_ycbcr);
+    }
+    #[allow(unreachable_code)]
+    None
+}
+
+/// Arch-specific implementation of 8x8 IDCT.
+pub fn get_dequantize_and_idct_block_8x8(
+) -> Option<unsafe fn(&[i16; 64], &[u16; 64], usize, &mut [u8])> {
+    #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+    #[allow(unsafe_code)]
+    {
+        if is_x86_feature_detected!("ssse3") {
+            return Some(ssse3::dequantize_and_idct_block_8x8);
+        }
+    }
+    // Runtime detection is not needed on aarch64.
+    #[cfg(all(feature = "nightly_aarch64_neon", target_arch = "aarch64"))]
+    {
+        return Some(neon::dequantize_and_idct_block_8x8);
+    }
+    #[allow(unreachable_code)]
+    None
+}
-- 
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