| /* |
| * 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 |
