summaryrefslogtreecommitdiffstats
path: root/media/base/yuv_row_mac.cc
diff options
context:
space:
mode:
Diffstat (limited to 'media/base/yuv_row_mac.cc')
-rw-r--r--media/base/yuv_row_mac.cc254
1 files changed, 254 insertions, 0 deletions
diff --git a/media/base/yuv_row_mac.cc b/media/base/yuv_row_mac.cc
new file mode 100644
index 0000000..4acc454
--- /dev/null
+++ b/media/base/yuv_row_mac.cc
@@ -0,0 +1,254 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/base/yuv_row.h"
+
+// Enable bilinear filtering by turning on the following macro.
+// #define MEDIA_BILINEAR_FILTER 1
+
+#ifdef _DEBUG
+#include "base/logging.h"
+#else
+#define DCHECK(a)
+#endif
+
+namespace media {
+
+// Reference version of YUV converter.
+static const int kClipTableSize = 256;
+static const int kClipOverflow = 256;
+
+static uint8 g_rgb_clip_table[kClipOverflow +
+ kClipTableSize +
+ kClipOverflow] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 256 underflow values
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // clipped to 0.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, // Unclipped values.
+ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
+ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+ 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
+ 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+ 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
+ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+ 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
+ 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+ 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
+ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+ 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
+ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+ 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
+ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+ 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
+ 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
+ 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
+ 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
+ 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
+ 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
+ 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
+ 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
+ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
+ 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
+ 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
+ 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
+ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 256 overflow values
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // clipped to 255.
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+};
+
+// Clip an rgb channel value to 0..255 range.
+// Source is signed fixed point 8.8.
+// Table allows for values to underflow or overflow by 128.
+// Therefore source range is -128 to 384.
+// Output clips to unsigned 0 to 255.
+static inline uint32 clip(int32 value) {
+ DCHECK(((value >> 8) + kClipOverflow) >= 0);
+ DCHECK(((value >> 8) + kClipOverflow) <
+ (kClipOverflow + kClipTableSize + kClipOverflow));
+ return static_cast<uint32>(g_rgb_clip_table[((value) >> 8) + kClipOverflow]);
+}
+
+static inline void YuvPixel(uint8 y,
+ uint8 u,
+ uint8 v,
+ uint8* rgb_buf) {
+ int32 d = static_cast<int32>(u) - 128;
+ int32 e = static_cast<int32>(v) - 128;
+
+ int32 cb = (516 * d + 128);
+ int32 cg = (- 100 * d - 208 * e + 128);
+ int32 cr = (409 * e + 128);
+
+ int32 C298a = ((static_cast<int32>(y) - 16) * 298 + 128);
+ *reinterpret_cast<uint32*>(rgb_buf) = (clip(C298a + cb)) |
+ (clip(C298a + cg) << 8) |
+ (clip(C298a + cr) << 16) |
+ (0xff000000);
+}
+
+void ConvertYV12ToRGB32Row(const uint8* y_buf,
+ const uint8* u_buf,
+ const uint8* v_buf,
+ uint8* rgb_buf,
+ int width) {
+ for (int32 x = 0; x < static_cast<int32>(width); x += 2) {
+ uint8 u = u_buf[x >> 1];
+ uint8 v = v_buf[x >> 1];
+ int32 d = static_cast<int32>(u) - 128;
+ int32 e = static_cast<int32>(v) - 128;
+
+ int32 cb = (516 * d + 128);
+ int32 cg = (- 100 * d - 208 * e + 128);
+ int32 cr = (409 * e + 128);
+
+ uint8 y0 = y_buf[x];
+ int32 C298a = ((static_cast<int32>(y0) - 16) * 298 + 128);
+ *reinterpret_cast<uint32*>(rgb_buf) = clip(C298a + cb) |
+ (clip(C298a + cg) << 8) |
+ (clip(C298a + cr) << 16) |
+ 0xff000000;
+
+ uint8 y1 = y_buf[x + 1];
+ int32 C298b = ((static_cast<int32>(y1) - 16) * 298 + 128);
+ *reinterpret_cast<uint32*>(rgb_buf + 4) = clip(C298b + cb) |
+ (clip(C298b + cg) << 8) |
+ (clip(C298b + cr) << 16) |
+ 0xff000000;
+
+ rgb_buf += 8; // Advance 2 pixels.
+ }
+}
+
+void HalfYV12ToRGB32Row(const uint8* y_buf,
+ const uint8* u_buf,
+ const uint8* v_buf,
+ uint8* rgb_buf,
+ int width) {
+ for (int32 x = 0; x < width; ++x) {
+ uint8 u = u_buf[x];
+ uint8 v = v_buf[x];
+ int32 d = static_cast<int32>(u) - 128;
+ int32 e = static_cast<int32>(v) - 128;
+
+ int32 cb = (516 * d + 128);
+ int32 cg = (- 100 * d - 208 * e + 128);
+ int32 cr = (409 * e + 128);
+
+ uint8 y0 = y_buf[x * 2 + 0];
+ uint8 y1 = y_buf[x * 2 + 1];
+ int32 C298a = ((static_cast<int32>((y0 + y1) >> 1) - 16) * 298 + 128);
+ *reinterpret_cast<uint32*>(rgb_buf) = clip(C298a + cb) |
+ (clip(C298a + cg) << 8) |
+ (clip(C298a + cr) << 16) |
+ 0xff000000;
+
+ rgb_buf += 4;
+ }
+}
+
+// 28.4 fixed point is used. A shift by 4 isolates the integer.
+// A shift by 5 is used to further subsample the chrominence channels.
+// & 15 isolates the fixed point fraction. >> 2 to get the upper 2 bits,
+// for 1/4 pixel accurate interpolation.
+void ScaleYV12ToRGB32Row(const uint8* y_buf,
+ const uint8* u_buf,
+ const uint8* v_buf,
+ uint8* rgb_buf,
+ int width,
+ int scaled_dx) {
+ int scaled_x = 0;
+ for (int32 x = 0; x < width; ++x) {
+ uint8 u = u_buf[scaled_x >> 5];
+ uint8 v = v_buf[scaled_x >> 5];
+ uint8 y0 = y_buf[scaled_x >> 4];
+#if MEDIA_BILINEAR_FILTER
+ uint8 y1 = y_buf[(scaled_x >> 4) + 1];
+ switch ((scaled_x & 15) >> 2) {
+ case 1: // 75% first pixel, 25% second pixel.
+ y0 = (y0 + y0 + y0 + y1) >> 2;
+ break;
+ case 2: // 50/50 blend
+ y0 = (y0 + y1) >> 1;
+ break;
+ case 3: // 25% first pixel, 75% second pixel.
+ y0 = (y0 + y1 + y1 + y1) >> 2;
+ break;
+ default:
+ case 0: // 100% first pixel.
+ break;
+ }
+#endif // MEDIA_BILINEAR_FILTER
+
+ YuvPixel(y0, u, v, rgb_buf);
+
+ rgb_buf += 4;
+ scaled_x += scaled_dx;
+ }
+}
+
+} // namespace media
+
generated by cgit v1.1 at 2025-01-21 14:05:47 +0000