| /* |
| * 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_t* sample, |
| size_t sample_size, |
| uint8_t* dst_y, |
| int dst_stride_y, |
| uint8_t* dst_u, |
| int dst_stride_u, |
| uint8_t* dst_v, |
| int dst_stride_v, |
| int crop_x, |
| int crop_y, |
| int src_width, |
| int src_height, |
| int crop_width, |
| int crop_height, |
| enum RotationMode rotation, |
| uint32_t fourcc) { |
| uint32_t format = CanonicalFourCC(fourcc); |
| int aligned_src_width = (src_width + 1) & ~1; |
| const uint8_t* src; |
| const uint8_t* src_uv; |
| const int abs_src_height = (src_height < 0) ? -src_height : src_height; |
| // TODO(nisse): Why allow crop_height < 0? |
| const int abs_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_YV12) || |
| dst_y == sample; |
| uint8_t* tmp_y = dst_y; |
| uint8_t* tmp_u = dst_u; |
| uint8_t* tmp_v = dst_v; |
| int tmp_y_stride = dst_stride_y; |
| int tmp_u_stride = dst_stride_u; |
| int tmp_v_stride = dst_stride_v; |
| uint8_t* rotate_buffer = NULL; |
| const int inv_crop_height = |
| (src_height < 0) ? -abs_crop_height : abs_crop_height; |
| |
| if (!dst_y || !dst_u || !dst_v || !sample || src_width <= 0 || |
| crop_width <= 0 || src_height == 0 || crop_height == 0) { |
| return -1; |
| } |
| |
| // 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 dst_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_t*)malloc(y_size + uv_size * 2); /* NOLINT */ |
| if (!rotate_buffer) { |
| return 1; // Out of memory runtime error. |
| } |
| dst_y = rotate_buffer; |
| dst_u = dst_y + y_size; |
| dst_v = dst_u + uv_size; |
| dst_stride_y = crop_width; |
| dst_stride_u = dst_stride_v = ((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, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, 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, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_RGBP: |
| src = sample + (src_width * crop_y + crop_x) * 2; |
| r = RGB565ToI420(src, src_width * 2, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_RGBO: |
| src = sample + (src_width * crop_y + crop_x) * 2; |
| r = ARGB1555ToI420(src, src_width * 2, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_R444: |
| src = sample + (src_width * crop_y + crop_x) * 2; |
| r = ARGB4444ToI420(src, src_width * 2, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_24BG: |
| src = sample + (src_width * crop_y + crop_x) * 3; |
| r = RGB24ToI420(src, src_width * 3, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_RAW: |
| src = sample + (src_width * crop_y + crop_x) * 3; |
| r = RAWToI420(src, src_width * 3, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_ARGB: |
| src = sample + (src_width * crop_y + crop_x) * 4; |
| r = ARGBToI420(src, src_width * 4, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_BGRA: |
| src = sample + (src_width * crop_y + crop_x) * 4; |
| r = BGRAToI420(src, src_width * 4, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_ABGR: |
| src = sample + (src_width * crop_y + crop_x) * 4; |
| r = ABGRToI420(src, src_width * 4, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| case FOURCC_RGBA: |
| src = sample + (src_width * crop_y + crop_x) * 4; |
| r = RGBAToI420(src, src_width * 4, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, crop_width, |
| inv_crop_height); |
| break; |
| // TODO(fbarchard): Add AR30 and AB30 |
| case FOURCC_I400: |
| src = sample + src_width * crop_y + crop_x; |
| r = I400ToI420(src, src_width, dst_y, dst_stride_y, dst_u, dst_stride_u, |
| dst_v, dst_stride_v, crop_width, inv_crop_height); |
| break; |
| // Biplanar formats |
| case FOURCC_NV12: |
| src = sample + (src_width * crop_y + crop_x); |
| src_uv = sample + (src_width * abs_src_height) + |
| ((crop_y / 2) * aligned_src_width) + ((crop_x / 2) * 2); |
| r = NV12ToI420Rotate(src, src_width, src_uv, aligned_src_width, dst_y, |
| dst_stride_y, dst_u, dst_stride_u, dst_v, |
| dst_stride_v, crop_width, inv_crop_height, rotation); |
| break; |
| case FOURCC_NV21: |
| src = sample + (src_width * crop_y + crop_x); |
| src_uv = sample + (src_width * abs_src_height) + |
| ((crop_y / 2) * aligned_src_width) + ((crop_x / 2) * 2); |
| // Call NV12 but with dst_u and dst_v parameters swapped. |
| r = NV12ToI420Rotate(src, src_width, src_uv, aligned_src_width, dst_y, |
| dst_stride_y, dst_v, dst_stride_v, dst_u, |
| dst_stride_u, crop_width, inv_crop_height, rotation); |
| break; |
| // Triplanar formats |
| case FOURCC_I420: |
| case FOURCC_YV12: { |
| const uint8_t* src_y = sample + (src_width * crop_y + crop_x); |
| const uint8_t* src_u; |
| const uint8_t* 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 / 2) + |
| (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 / 2) + |
| (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, |
| dst_y, dst_stride_y, dst_u, dst_stride_u, dst_v, |
| dst_stride_v, crop_width, inv_crop_height, rotation); |
| break; |
| } |
| case FOURCC_I422: |
| case FOURCC_YV16: { |
| const uint8_t* src_y = sample + src_width * crop_y + crop_x; |
| const uint8_t* src_u; |
| const uint8_t* 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, |
| dst_y, dst_stride_y, dst_u, dst_stride_u, dst_v, |
| dst_stride_v, crop_width, inv_crop_height); |
| break; |
| } |
| case FOURCC_I444: |
| case FOURCC_YV24: { |
| const uint8_t* src_y = sample + src_width * crop_y + crop_x; |
| const uint8_t* src_u; |
| const uint8_t* 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, |
| dst_y, dst_stride_y, dst_u, dst_stride_u, dst_v, |
| dst_stride_v, crop_width, inv_crop_height); |
| break; |
| } |
| #ifdef HAVE_JPEG |
| case FOURCC_MJPG: |
| r = MJPGToI420(sample, sample_size, dst_y, dst_stride_y, dst_u, |
| dst_stride_u, dst_v, dst_stride_v, 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(dst_y, dst_stride_y, dst_u, dst_stride_u, dst_v, |
| dst_stride_v, 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 |
