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Diffstat (limited to 'source/convert_to_i420.cc')
| -rw-r--r-- | source/convert_to_i420.cc | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/source/convert_to_i420.cc b/source/convert_to_i420.cc new file mode 100644 index 00000000..5869ecd7 --- /dev/null +++ b/source/convert_to_i420.cc @@ -0,0 +1,280 @@ +/* + * 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: { // TODO(fbarchard): Find better odd crop fix. + uint8_t* u = (crop_x & 1) ? dst_v : dst_u; + uint8_t* v = (crop_x & 1) ? dst_u : dst_v; + int stride_u = (crop_x & 1) ? dst_stride_v : dst_stride_u; + int stride_v = (crop_x & 1) ? dst_stride_u : dst_stride_v; + src = sample + (aligned_src_width * crop_y + crop_x) * 2; + r = YUY2ToI420(src, aligned_src_width * 2, dst_y, dst_stride_y, u, + stride_u, v, stride_v, crop_width, inv_crop_height); + break; + } + case FOURCC_UYVY: { + uint8_t* u = (crop_x & 1) ? dst_v : dst_u; + uint8_t* v = (crop_x & 1) ? dst_u : dst_v; + int stride_u = (crop_x & 1) ? dst_stride_v : dst_stride_u; + int stride_v = (crop_x & 1) ? dst_stride_u : dst_stride_v; + src = sample + (aligned_src_width * crop_y + crop_x) * 2; + r = UYVYToI420(src, aligned_src_width * 2, dst_y, dst_stride_y, u, + stride_u, v, 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 |