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-rw-r--r--media/libvpx/vp9/vp9_iface_common.h130
1 files changed, 130 insertions, 0 deletions
diff --git a/media/libvpx/vp9/vp9_iface_common.h b/media/libvpx/vp9/vp9_iface_common.h
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+++ b/media/libvpx/vp9/vp9_iface_common.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef VP9_VP9_IFACE_COMMON_H_
+#define VP9_VP9_IFACE_COMMON_H_
+
+#include "vpx_ports/mem.h"
+
+static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG *yv12,
+ void *user_priv) {
+ /** vpx_img_wrap() doesn't allow specifying independent strides for
+ * the Y, U, and V planes, nor other alignment adjustments that
+ * might be representable by a YV12_BUFFER_CONFIG, so we just
+ * initialize all the fields.*/
+ int bps;
+ if (!yv12->subsampling_y) {
+ if (!yv12->subsampling_x) {
+ img->fmt = VPX_IMG_FMT_I444;
+ bps = 24;
+ } else {
+ img->fmt = VPX_IMG_FMT_I422;
+ bps = 16;
+ }
+ } else {
+ if (!yv12->subsampling_x) {
+ img->fmt = VPX_IMG_FMT_I440;
+ bps = 16;
+ } else {
+ img->fmt = VPX_IMG_FMT_I420;
+ bps = 12;
+ }
+ }
+ img->cs = yv12->color_space;
+ img->bit_depth = 8;
+ img->w = yv12->y_stride;
+ img->h = ALIGN_POWER_OF_TWO(yv12->y_height + 2 * VP9_ENC_BORDER_IN_PIXELS, 3);
+ img->d_w = yv12->y_crop_width;
+ img->d_h = yv12->y_crop_height;
+ img->x_chroma_shift = yv12->subsampling_x;
+ img->y_chroma_shift = yv12->subsampling_y;
+ img->planes[VPX_PLANE_Y] = yv12->y_buffer;
+ img->planes[VPX_PLANE_U] = yv12->u_buffer;
+ img->planes[VPX_PLANE_V] = yv12->v_buffer;
+ img->planes[VPX_PLANE_ALPHA] = NULL;
+ img->stride[VPX_PLANE_Y] = yv12->y_stride;
+ img->stride[VPX_PLANE_U] = yv12->uv_stride;
+ img->stride[VPX_PLANE_V] = yv12->uv_stride;
+ img->stride[VPX_PLANE_ALPHA] = yv12->y_stride;
+#if CONFIG_VP9_HIGHBITDEPTH
+ if (yv12->flags & YV12_FLAG_HIGHBITDEPTH) {
+ // vpx_image_t uses byte strides and a pointer to the first byte
+ // of the image.
+ img->fmt |= VPX_IMG_FMT_HIGHBITDEPTH;
+ img->bit_depth = yv12->bit_depth;
+ img->planes[VPX_PLANE_Y] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->y_buffer);
+ img->planes[VPX_PLANE_U] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->u_buffer);
+ img->planes[VPX_PLANE_V] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->v_buffer);
+ img->planes[VPX_PLANE_ALPHA] = NULL;
+ img->stride[VPX_PLANE_Y] = 2 * yv12->y_stride;
+ img->stride[VPX_PLANE_U] = 2 * yv12->uv_stride;
+ img->stride[VPX_PLANE_V] = 2 * yv12->uv_stride;
+ img->stride[VPX_PLANE_ALPHA] = 2 * yv12->y_stride;
+ }
+#endif // CONFIG_VP9_HIGHBITDEPTH
+ img->bps = bps;
+ img->user_priv = user_priv;
+ img->img_data = yv12->buffer_alloc;
+ img->img_data_owner = 0;
+ img->self_allocd = 0;
+}
+
+static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img,
+ YV12_BUFFER_CONFIG *yv12) {
+ yv12->y_buffer = img->planes[VPX_PLANE_Y];
+ yv12->u_buffer = img->planes[VPX_PLANE_U];
+ yv12->v_buffer = img->planes[VPX_PLANE_V];
+
+ yv12->y_crop_width = img->d_w;
+ yv12->y_crop_height = img->d_h;
+ yv12->y_width = img->d_w;
+ yv12->y_height = img->d_h;
+
+ yv12->uv_width = img->x_chroma_shift == 1 ? (1 + yv12->y_width) / 2
+ : yv12->y_width;
+ yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2
+ : yv12->y_height;
+ yv12->uv_crop_width = yv12->uv_width;
+ yv12->uv_crop_height = yv12->uv_height;
+
+ yv12->y_stride = img->stride[VPX_PLANE_Y];
+ yv12->uv_stride = img->stride[VPX_PLANE_U];
+ yv12->color_space = img->cs;
+
+#if CONFIG_VP9_HIGHBITDEPTH
+ if (img->fmt & VPX_IMG_FMT_HIGHBITDEPTH) {
+ // In vpx_image_t
+ // planes point to uint8 address of start of data
+ // stride counts uint8s to reach next row
+ // In YV12_BUFFER_CONFIG
+ // y_buffer, u_buffer, v_buffer point to uint16 address of data
+ // stride and border counts in uint16s
+ // This means that all the address calculations in the main body of code
+ // should work correctly.
+ // However, before we do any pixel operations we need to cast the address
+ // to a uint16 ponter and double its value.
+ yv12->y_buffer = CONVERT_TO_BYTEPTR(yv12->y_buffer);
+ yv12->u_buffer = CONVERT_TO_BYTEPTR(yv12->u_buffer);
+ yv12->v_buffer = CONVERT_TO_BYTEPTR(yv12->v_buffer);
+ yv12->y_stride >>= 1;
+ yv12->uv_stride >>= 1;
+ yv12->flags = YV12_FLAG_HIGHBITDEPTH;
+ } else {
+ yv12->flags = 0;
+ }
+ yv12->border = (yv12->y_stride - img->w) / 2;
+#else
+ yv12->border = (img->stride[VPX_PLANE_Y] - img->w) / 2;
+#endif // CONFIG_VP9_HIGHBITDEPTH
+ yv12->subsampling_x = img->x_chroma_shift;
+ yv12->subsampling_y = img->y_chroma_shift;
+ return VPX_CODEC_OK;
+}
+
+#endif // VP9_VP9_IFACE_COMMON_H_