From c61de7e05eaf00fa7514cbd0f5df6eecdebb15a4 Mon Sep 17 00:00:00 2001
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From: Jeffy Chen <jeffy.chen@rock-chips.com>
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Date: Mon, 4 Nov 2019 11:11:59 +0800
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Subject: [PATCH 3/6] Support PIXMAN_i420 format
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Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
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---
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pixman/pixman-access.c | 77 ++++++++++++++++++++++++++++++++++++++++++
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pixman/pixman.c | 4 ++-
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pixman/pixman.h | 2 ++
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3 files changed, 82 insertions(+), 1 deletion(-)
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diff --git a/pixman/pixman-access.c b/pixman/pixman-access.c
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index 1e5c0ba..e7f97ea 100644
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--- a/pixman/pixman-access.c
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+++ b/pixman/pixman-access.c
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@@ -192,6 +192,15 @@
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((uint8_t *) ((bits) + offset0 + \
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((stride) >> 1) * ((line) >> 1)))
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+/*
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+ * I420 setup and access macros
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+ */
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+
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+#define I420_SETUP(image) YV12_SETUP(image)
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+#define I420_Y(line) YV12_Y(line)
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+#define I420_U(line) YV12_V(line)
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+#define I420_V(line) YV12_U(line)
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+
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/*
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* NV12 setup and access macros
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*/
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@@ -864,6 +873,43 @@ fetch_scanline_yv12 (bits_image_t *image,
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}
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}
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+static void
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+fetch_scanline_i420 (bits_image_t *image,
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+ int x,
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+ int line,
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+ int width,
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+ uint32_t * buffer,
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+ const uint32_t *mask)
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+{
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+ I420_SETUP (image);
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+ uint8_t *y_line = I420_Y (line);
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+ uint8_t *u_line = I420_U (line);
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+ uint8_t *v_line = I420_V (line);
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+ int i;
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+
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+ for (i = 0; i < width; i++)
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+ {
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+ int16_t y, u, v;
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+ int32_t r, g, b;
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+
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+ y = y_line[x + i] - 16;
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+ u = u_line[(x + i) >> 1] - 128;
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+ v = v_line[(x + i) >> 1] - 128;
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+
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+ /* R = 1.164(Y - 16) + 1.596(V - 128) */
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+ r = 0x012b27 * y + 0x019a2e * v;
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+ /* G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128) */
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+ g = 0x012b27 * y - 0x00d0f2 * v - 0x00647e * u;
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+ /* B = 1.164(Y - 16) + 2.018(U - 128) */
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+ b = 0x012b27 * y + 0x0206a2 * u;
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+
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+ *buffer++ = 0xff000000 |
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+ (r >= 0 ? r < 0x1000000 ? r & 0xff0000 : 0xff0000 : 0) |
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+ (g >= 0 ? g < 0x1000000 ? (g >> 8) & 0x00ff00 : 0x00ff00 : 0) |
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+ (b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
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+ }
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+}
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+
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static void
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fetch_scanline_nv12 (bits_image_t *image,
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int x,
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@@ -1091,6 +1137,32 @@ fetch_pixel_yv12 (bits_image_t *image,
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(b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
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}
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+static uint32_t
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+fetch_pixel_i420 (bits_image_t *image,
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+ int offset,
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+ int line)
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+{
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+ I420_SETUP (image);
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+ int16_t y = I420_Y (line)[offset] - 16;
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+ int16_t u = I420_U (line)[offset >> 1] - 128;
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+ int16_t v = I420_V (line)[offset >> 1] - 128;
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+ int32_t r, g, b;
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+
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+ /* R = 1.164(Y - 16) + 1.596(V - 128) */
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+ r = 0x012b27 * y + 0x019a2e * v;
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+
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+ /* G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128) */
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+ g = 0x012b27 * y - 0x00d0f2 * v - 0x00647e * u;
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+
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+ /* B = 1.164(Y - 16) + 2.018(U - 128) */
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+ b = 0x012b27 * y + 0x0206a2 * u;
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+
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+ return 0xff000000 |
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+ (r >= 0 ? r < 0x1000000 ? r & 0xff0000 : 0xff0000 : 0) |
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+ (g >= 0 ? g < 0x1000000 ? (g >> 8) & 0x00ff00 : 0x00ff00 : 0) |
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+ (b >= 0 ? b < 0x1000000 ? (b >> 16) & 0x0000ff : 0x0000ff : 0);
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+}
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+
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static uint32_t
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fetch_pixel_nv12 (bits_image_t *image,
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int offset,
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@@ -1589,6 +1661,11 @@ static const format_info_t accessors[] =
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fetch_scanline_yv12, fetch_scanline_generic_float,
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fetch_pixel_yv12, fetch_pixel_generic_float,
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NULL, NULL },
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+
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+ { PIXMAN_i420,
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+ fetch_scanline_i420, fetch_scanline_generic_float,
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+ fetch_pixel_i420, fetch_pixel_generic_float,
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+ NULL, NULL },
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{ PIXMAN_nv12,
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fetch_scanline_nv12, fetch_scanline_generic_float,
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diff --git a/pixman/pixman.c b/pixman/pixman.c
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index d8a2d24..ac06002 100644
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--- a/pixman/pixman.c
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+++ b/pixman/pixman.c
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@@ -1070,6 +1070,7 @@ pixman_format_supported_source (pixman_format_code_t format)
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/* YUV formats */
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case PIXMAN_yuy2:
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case PIXMAN_yv12:
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+ case PIXMAN_i420:
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case PIXMAN_nv12:
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return TRUE;
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@@ -1093,7 +1094,8 @@ PIXMAN_EXPORT pixman_bool_t
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pixman_format_supported_destination (pixman_format_code_t format)
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{
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/* YUV formats cannot be written to at the moment */
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- if (format == PIXMAN_yuy2 || format == PIXMAN_yv12 || format == PIXMAN_nv12)
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+ if (format == PIXMAN_yuy2 || format == PIXMAN_yv12 ||
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+ format == PIXMAN_nv12 || format == PIXMAN_i420)
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return FALSE;
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return pixman_format_supported_source (format);
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diff --git a/pixman/pixman.h b/pixman/pixman.h
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index 3bb2fa5..e8b0a78 100644
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--- a/pixman/pixman.h
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+++ b/pixman/pixman.h
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@@ -863,6 +863,7 @@ struct pixman_indexed
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/* HACK: Use maximum value to avoid conflict */
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#define PIXMAN_TYPE_NV12 0x3f
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+#define PIXMAN_TYPE_I420 0x3e
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#define PIXMAN_FORMAT_COLOR(f) \
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(PIXMAN_FORMAT_TYPE(f) == PIXMAN_TYPE_ARGB || \
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@@ -945,6 +946,7 @@ typedef enum {
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/* YUV formats */
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PIXMAN_yuy2 = PIXMAN_FORMAT(16,PIXMAN_TYPE_YUY2,0,0,0,0),
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PIXMAN_yv12 = PIXMAN_FORMAT(12,PIXMAN_TYPE_YV12,0,0,0,0),
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+ PIXMAN_i420 = PIXMAN_FORMAT(12,PIXMAN_TYPE_I420,0,0,0,0),
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PIXMAN_nv12 = PIXMAN_FORMAT(12,PIXMAN_TYPE_NV12,0,0,0,0),
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} pixman_format_code_t;
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--
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2.20.1
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