diff options
Diffstat (limited to 'media/libvpx/vp9/vp9_iface_common.h')
| -rw-r--r-- | media/libvpx/vp9/vp9_iface_common.h | 130 |
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 new file mode 100644 index 0000000000..58bb7d5d64 --- /dev/null +++ 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_ |