264 lines
10 KiB
C++
264 lines
10 KiB
C++
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/*
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* Copyright 2011 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <stdlib.h>
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#include "libyuv/convert.h"
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#include "libyuv/video_common.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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// Convert camera sample to I420 with cropping, rotation and vertical flip.
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// src_width is used for source stride computation
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// src_height is used to compute location of planes, and indicate inversion
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// sample_size is measured in bytes and is the size of the frame.
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// With MJPEG it is the compressed size of the frame.
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LIBYUV_API
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int ConvertToI420(const uint8* sample,
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size_t sample_size,
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uint8* y,
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int y_stride,
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uint8* u,
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int u_stride,
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uint8* v,
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int v_stride,
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int crop_x,
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int crop_y,
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int src_width,
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int src_height,
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int crop_width,
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int crop_height,
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enum RotationMode rotation,
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uint32 fourcc) {
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uint32 format = CanonicalFourCC(fourcc);
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int aligned_src_width = (src_width + 1) & ~1;
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const uint8* src;
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const uint8* src_uv;
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const int abs_src_height = (src_height < 0) ? -src_height : src_height;
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// TODO(nisse): Why allow crop_height < 0?
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const int abs_crop_height = (crop_height < 0) ? -crop_height : crop_height;
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int r = 0;
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LIBYUV_BOOL need_buf =
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(rotation && format != FOURCC_I420 && format != FOURCC_NV12 &&
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format != FOURCC_NV21 && format != FOURCC_YV12) ||
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y == sample;
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uint8* tmp_y = y;
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uint8* tmp_u = u;
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uint8* tmp_v = v;
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int tmp_y_stride = y_stride;
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int tmp_u_stride = u_stride;
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int tmp_v_stride = v_stride;
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uint8* rotate_buffer = NULL;
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const int inv_crop_height =
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(src_height < 0) ? -abs_crop_height : abs_crop_height;
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if (!y || !u || !v || !sample || src_width <= 0 || crop_width <= 0 ||
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src_height == 0 || crop_height == 0) {
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return -1;
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}
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// One pass rotation is available for some formats. For the rest, convert
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// to I420 (with optional vertical flipping) into a temporary I420 buffer,
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// and then rotate the I420 to the final destination buffer.
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// For in-place conversion, if destination y is same as source sample,
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// also enable temporary buffer.
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if (need_buf) {
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int y_size = crop_width * abs_crop_height;
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int uv_size = ((crop_width + 1) / 2) * ((abs_crop_height + 1) / 2);
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rotate_buffer = (uint8*)malloc(y_size + uv_size * 2); /* NOLINT */
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if (!rotate_buffer) {
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return 1; // Out of memory runtime error.
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}
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y = rotate_buffer;
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u = y + y_size;
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v = u + uv_size;
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y_stride = crop_width;
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u_stride = v_stride = ((crop_width + 1) / 2);
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}
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switch (format) {
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// Single plane formats
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case FOURCC_YUY2:
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src = sample + (aligned_src_width * crop_y + crop_x) * 2;
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r = YUY2ToI420(src, aligned_src_width * 2, y, y_stride, u, u_stride, v,
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v_stride, crop_width, inv_crop_height);
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break;
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case FOURCC_UYVY:
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src = sample + (aligned_src_width * crop_y + crop_x) * 2;
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r = UYVYToI420(src, aligned_src_width * 2, y, y_stride, u, u_stride, v,
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v_stride, crop_width, inv_crop_height);
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break;
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case FOURCC_RGBP:
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src = sample + (src_width * crop_y + crop_x) * 2;
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r = RGB565ToI420(src, src_width * 2, y, y_stride, u, u_stride, v,
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v_stride, crop_width, inv_crop_height);
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break;
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case FOURCC_RGBO:
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src = sample + (src_width * crop_y + crop_x) * 2;
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r = ARGB1555ToI420(src, src_width * 2, y, y_stride, u, u_stride, v,
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v_stride, crop_width, inv_crop_height);
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break;
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case FOURCC_R444:
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src = sample + (src_width * crop_y + crop_x) * 2;
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r = ARGB4444ToI420(src, src_width * 2, y, y_stride, u, u_stride, v,
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v_stride, crop_width, inv_crop_height);
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break;
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case FOURCC_24BG:
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src = sample + (src_width * crop_y + crop_x) * 3;
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r = RGB24ToI420(src, src_width * 3, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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case FOURCC_RAW:
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src = sample + (src_width * crop_y + crop_x) * 3;
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r = RAWToI420(src, src_width * 3, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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case FOURCC_ARGB:
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src = sample + (src_width * crop_y + crop_x) * 4;
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r = ARGBToI420(src, src_width * 4, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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case FOURCC_BGRA:
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src = sample + (src_width * crop_y + crop_x) * 4;
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r = BGRAToI420(src, src_width * 4, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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case FOURCC_ABGR:
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src = sample + (src_width * crop_y + crop_x) * 4;
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r = ABGRToI420(src, src_width * 4, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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case FOURCC_RGBA:
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src = sample + (src_width * crop_y + crop_x) * 4;
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r = RGBAToI420(src, src_width * 4, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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case FOURCC_I400:
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src = sample + src_width * crop_y + crop_x;
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r = I400ToI420(src, src_width, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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// Biplanar formats
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case FOURCC_NV12:
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src = sample + (src_width * crop_y + crop_x);
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src_uv = sample + (src_width * src_height) +
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((crop_y / 2) * aligned_src_width) + ((crop_x / 2) * 2);
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r = NV12ToI420Rotate(src, src_width, src_uv, aligned_src_width, y,
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y_stride, u, u_stride, v, v_stride, crop_width,
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inv_crop_height, rotation);
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break;
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case FOURCC_NV21:
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src = sample + (src_width * crop_y + crop_x);
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src_uv = sample + (src_width * src_height) +
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((crop_y / 2) * aligned_src_width) + ((crop_x / 2) * 2);
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// Call NV12 but with u and v parameters swapped.
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r = NV12ToI420Rotate(src, src_width, src_uv, aligned_src_width, y,
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y_stride, v, v_stride, u, u_stride, crop_width,
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inv_crop_height, rotation);
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break;
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case FOURCC_M420:
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src = sample + (src_width * crop_y) * 12 / 8 + crop_x;
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r = M420ToI420(src, src_width, y, y_stride, u, u_stride, v, v_stride,
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crop_width, inv_crop_height);
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break;
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// Triplanar formats
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case FOURCC_I420:
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case FOURCC_YV12: {
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const uint8* src_y = sample + (src_width * crop_y + crop_x);
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const uint8* src_u;
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const uint8* src_v;
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int halfwidth = (src_width + 1) / 2;
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int halfheight = (abs_src_height + 1) / 2;
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if (format == FOURCC_YV12) {
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src_v = sample + src_width * abs_src_height +
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(halfwidth * crop_y + crop_x) / 2;
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src_u = sample + src_width * abs_src_height +
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halfwidth * (halfheight + crop_y / 2) + crop_x / 2;
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} else {
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src_u = sample + src_width * abs_src_height +
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(halfwidth * crop_y + crop_x) / 2;
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src_v = sample + src_width * abs_src_height +
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halfwidth * (halfheight + crop_y / 2) + crop_x / 2;
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}
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r = I420Rotate(src_y, src_width, src_u, halfwidth, src_v, halfwidth, y,
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y_stride, u, u_stride, v, v_stride, crop_width,
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inv_crop_height, rotation);
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break;
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}
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case FOURCC_I422:
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case FOURCC_YV16: {
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const uint8* src_y = sample + src_width * crop_y + crop_x;
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const uint8* src_u;
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const uint8* src_v;
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int halfwidth = (src_width + 1) / 2;
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if (format == FOURCC_YV16) {
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src_v = sample + src_width * abs_src_height + halfwidth * crop_y +
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crop_x / 2;
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src_u = sample + src_width * abs_src_height +
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halfwidth * (abs_src_height + crop_y) + crop_x / 2;
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} else {
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src_u = sample + src_width * abs_src_height + halfwidth * crop_y +
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crop_x / 2;
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src_v = sample + src_width * abs_src_height +
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halfwidth * (abs_src_height + crop_y) + crop_x / 2;
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}
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r = I422ToI420(src_y, src_width, src_u, halfwidth, src_v, halfwidth, y,
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y_stride, u, u_stride, v, v_stride, crop_width,
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inv_crop_height);
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break;
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}
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case FOURCC_I444:
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case FOURCC_YV24: {
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const uint8* src_y = sample + src_width * crop_y + crop_x;
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const uint8* src_u;
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const uint8* src_v;
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if (format == FOURCC_YV24) {
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src_v = sample + src_width * (abs_src_height + crop_y) + crop_x;
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src_u = sample + src_width * (abs_src_height * 2 + crop_y) + crop_x;
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} else {
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src_u = sample + src_width * (abs_src_height + crop_y) + crop_x;
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src_v = sample + src_width * (abs_src_height * 2 + crop_y) + crop_x;
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}
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r = I444ToI420(src_y, src_width, src_u, src_width, src_v, src_width, y,
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y_stride, u, u_stride, v, v_stride, crop_width,
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inv_crop_height);
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break;
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}
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#ifdef HAVE_JPEG
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case FOURCC_MJPG:
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r = MJPGToI420(sample, sample_size, y, y_stride, u, u_stride, v, v_stride,
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src_width, abs_src_height, crop_width, inv_crop_height);
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break;
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#endif
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default:
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r = -1; // unknown fourcc - return failure code.
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}
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if (need_buf) {
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if (!r) {
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r = I420Rotate(y, y_stride, u, u_stride, v, v_stride, tmp_y, tmp_y_stride,
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tmp_u, tmp_u_stride, tmp_v, tmp_v_stride, crop_width,
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abs_crop_height, rotation);
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}
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free(rotate_buffer);
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}
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return r;
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}
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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