| /* | |
| * Copyright 2011 The LibYuv 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. | |
| */ | |
| #include <stdlib.h> | |
| #include "libyuv/convert.h" | |
| #include "libyuv/video_common.h" | |
| #ifdef __cplusplus | |
| namespace libyuv { | |
| extern "C" { | |
| #endif | |
| // Convert camera sample to I420 with cropping, rotation and vertical flip. | |
| // src_width is used for source stride computation | |
| // src_height is used to compute location of planes, and indicate inversion | |
| // sample_size is measured in bytes and is the size of the frame. | |
| // With MJPEG it is the compressed size of the frame. | |
| LIBYUV_API | |
| int ConvertToI420(const uint8* sample, | |
| size_t sample_size, | |
| uint8* y, int y_stride, | |
| uint8* u, int u_stride, | |
| uint8* v, int v_stride, | |
| int crop_x, int crop_y, | |
| int src_width, int src_height, | |
| int crop_width, int crop_height, | |
| enum RotationMode rotation, | |
| uint32 fourcc) { | |
| uint32 format = CanonicalFourCC(fourcc); | |
| int aligned_src_width = (src_width + 1) & ~1; | |
| const uint8* src; | |
| const uint8* src_uv; | |
| int abs_src_height = (src_height < 0) ? -src_height : src_height; | |
| int inv_crop_height = (crop_height < 0) ? -crop_height : crop_height; | |
| int r = 0; | |
| LIBYUV_BOOL need_buf = (rotation && format != FOURCC_I420 && | |
| format != FOURCC_NV12 && format != FOURCC_NV21 && | |
| format != FOURCC_YU12 && format != FOURCC_YV12) || y == sample; | |
| uint8* tmp_y = y; | |
| uint8* tmp_u = u; | |
| uint8* tmp_v = v; | |
| int tmp_y_stride = y_stride; | |
| int tmp_u_stride = u_stride; | |
| int tmp_v_stride = v_stride; | |
| uint8* rotate_buffer = NULL; | |
| int abs_crop_height = (crop_height < 0) ? -crop_height : crop_height; | |
| if (!y || !u || !v || !sample || | |
| src_width <= 0 || crop_width <= 0 || | |
| src_height == 0 || crop_height == 0) { | |
| return -1; | |
| } | |
| if (src_height < 0) { | |
| inv_crop_height = -inv_crop_height; | |
| } | |
| // One pass rotation is available for some formats. For the rest, convert | |
| // to I420 (with optional vertical flipping) into a temporary I420 buffer, | |
| // and then rotate the I420 to the final destination buffer. | |
| // For in-place conversion, if destination y is same as source sample, | |
| // also enable temporary buffer. | |
| if (need_buf) { | |
| int y_size = crop_width * abs_crop_height; | |
| int uv_size = ((crop_width + 1) / 2) * ((abs_crop_height + 1) / 2); | |
| rotate_buffer = (uint8*)malloc(y_size + uv_size * 2); | |
| if (!rotate_buffer) { | |
| return 1; // Out of memory runtime error. | |
| } | |
| y = rotate_buffer; | |
| u = y + y_size; | |
| v = u + uv_size; | |
| y_stride = crop_width; | |
| u_stride = v_stride = ((crop_width + 1) / 2); | |
| } | |
| switch (format) { | |
| // Single plane formats | |
| case FOURCC_YUY2: | |
| src = sample + (aligned_src_width * crop_y + crop_x) * 2; | |
| r = YUY2ToI420(src, aligned_src_width * 2, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_UYVY: | |
| src = sample + (aligned_src_width * crop_y + crop_x) * 2; | |
| r = UYVYToI420(src, aligned_src_width * 2, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_RGBP: | |
| src = sample + (src_width * crop_y + crop_x) * 2; | |
| r = RGB565ToI420(src, src_width * 2, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_RGBO: | |
| src = sample + (src_width * crop_y + crop_x) * 2; | |
| r = ARGB1555ToI420(src, src_width * 2, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_R444: | |
| src = sample + (src_width * crop_y + crop_x) * 2; | |
| r = ARGB4444ToI420(src, src_width * 2, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_24BG: | |
| src = sample + (src_width * crop_y + crop_x) * 3; | |
| r = RGB24ToI420(src, src_width * 3, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_RAW: | |
| src = sample + (src_width * crop_y + crop_x) * 3; | |
| r = RAWToI420(src, src_width * 3, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_ARGB: | |
| src = sample + (src_width * crop_y + crop_x) * 4; | |
| r = ARGBToI420(src, src_width * 4, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_BGRA: | |
| src = sample + (src_width * crop_y + crop_x) * 4; | |
| r = BGRAToI420(src, src_width * 4, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_ABGR: | |
| src = sample + (src_width * crop_y + crop_x) * 4; | |
| r = ABGRToI420(src, src_width * 4, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_RGBA: | |
| src = sample + (src_width * crop_y + crop_x) * 4; | |
| r = RGBAToI420(src, src_width * 4, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| case FOURCC_I400: | |
| src = sample + src_width * crop_y + crop_x; | |
| r = I400ToI420(src, src_width, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| // Biplanar formats | |
| case FOURCC_NV12: | |
| src = sample + (src_width * crop_y + crop_x); | |
| src_uv = sample + (src_width * src_height) + | |
| ((crop_y / 2) * aligned_src_width) + ((crop_x / 2) * 2); | |
| r = NV12ToI420Rotate(src, src_width, | |
| src_uv, aligned_src_width, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height, rotation); | |
| break; | |
| case FOURCC_NV21: | |
| src = sample + (src_width * crop_y + crop_x); | |
| src_uv = sample + (src_width * src_height) + | |
| ((crop_y / 2) * aligned_src_width) + ((crop_x / 2) * 2); | |
| // Call NV12 but with u and v parameters swapped. | |
| r = NV12ToI420Rotate(src, src_width, | |
| src_uv, aligned_src_width, | |
| y, y_stride, | |
| v, v_stride, | |
| u, u_stride, | |
| crop_width, inv_crop_height, rotation); | |
| break; | |
| case FOURCC_M420: | |
| src = sample + (src_width * crop_y) * 12 / 8 + crop_x; | |
| r = M420ToI420(src, src_width, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| // Triplanar formats | |
| case FOURCC_I420: | |
| case FOURCC_YU12: | |
| case FOURCC_YV12: { | |
| const uint8* src_y = sample + (src_width * crop_y + crop_x); | |
| const uint8* src_u; | |
| const uint8* src_v; | |
| int halfwidth = (src_width + 1) / 2; | |
| int halfheight = (abs_src_height + 1) / 2; | |
| if (format == FOURCC_YV12) { | |
| src_v = sample + src_width * abs_src_height + | |
| (halfwidth * crop_y + crop_x) / 2; | |
| src_u = sample + src_width * abs_src_height + | |
| halfwidth * (halfheight + crop_y / 2) + crop_x / 2; | |
| } else { | |
| src_u = sample + src_width * abs_src_height + | |
| (halfwidth * crop_y + crop_x) / 2; | |
| src_v = sample + src_width * abs_src_height + | |
| halfwidth * (halfheight + crop_y / 2) + crop_x / 2; | |
| } | |
| r = I420Rotate(src_y, src_width, | |
| src_u, halfwidth, | |
| src_v, halfwidth, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height, rotation); | |
| break; | |
| } | |
| case FOURCC_I422: | |
| case FOURCC_YV16: { | |
| const uint8* src_y = sample + src_width * crop_y + crop_x; | |
| const uint8* src_u; | |
| const uint8* src_v; | |
| int halfwidth = (src_width + 1) / 2; | |
| if (format == FOURCC_YV16) { | |
| src_v = sample + src_width * abs_src_height + | |
| halfwidth * crop_y + crop_x / 2; | |
| src_u = sample + src_width * abs_src_height + | |
| halfwidth * (abs_src_height + crop_y) + crop_x / 2; | |
| } else { | |
| src_u = sample + src_width * abs_src_height + | |
| halfwidth * crop_y + crop_x / 2; | |
| src_v = sample + src_width * abs_src_height + | |
| halfwidth * (abs_src_height + crop_y) + crop_x / 2; | |
| } | |
| r = I422ToI420(src_y, src_width, | |
| src_u, halfwidth, | |
| src_v, halfwidth, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| } | |
| case FOURCC_I444: | |
| case FOURCC_YV24: { | |
| const uint8* src_y = sample + src_width * crop_y + crop_x; | |
| const uint8* src_u; | |
| const uint8* src_v; | |
| if (format == FOURCC_YV24) { | |
| src_v = sample + src_width * (abs_src_height + crop_y) + crop_x; | |
| src_u = sample + src_width * (abs_src_height * 2 + crop_y) + crop_x; | |
| } else { | |
| src_u = sample + src_width * (abs_src_height + crop_y) + crop_x; | |
| src_v = sample + src_width * (abs_src_height * 2 + crop_y) + crop_x; | |
| } | |
| r = I444ToI420(src_y, src_width, | |
| src_u, src_width, | |
| src_v, src_width, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| } | |
| case FOURCC_I411: { | |
| int quarterwidth = (src_width + 3) / 4; | |
| const uint8* src_y = sample + src_width * crop_y + crop_x; | |
| const uint8* src_u = sample + src_width * abs_src_height + | |
| quarterwidth * crop_y + crop_x / 4; | |
| const uint8* src_v = sample + src_width * abs_src_height + | |
| quarterwidth * (abs_src_height + crop_y) + crop_x / 4; | |
| r = I411ToI420(src_y, src_width, | |
| src_u, quarterwidth, | |
| src_v, quarterwidth, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| crop_width, inv_crop_height); | |
| break; | |
| } | |
| #ifdef HAVE_JPEG | |
| case FOURCC_MJPG: | |
| r = MJPGToI420(sample, sample_size, | |
| y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| src_width, abs_src_height, crop_width, inv_crop_height); | |
| break; | |
| #endif | |
| default: | |
| r = -1; // unknown fourcc - return failure code. | |
| } | |
| if (need_buf) { | |
| if (!r) { | |
| r = I420Rotate(y, y_stride, | |
| u, u_stride, | |
| v, v_stride, | |
| tmp_y, tmp_y_stride, | |
| tmp_u, tmp_u_stride, | |
| tmp_v, tmp_v_stride, | |
| crop_width, abs_crop_height, rotation); | |
| } | |
| free(rotate_buffer); | |
| } | |
| return r; | |
| } | |
| #ifdef __cplusplus | |
| } // extern "C" | |
| } // namespace libyuv | |
| #endif |