diff options
Diffstat (limited to 'src/qcam')
| -rw-r--r-- | src/qcam/format_converter.cpp | 99 | ||||
| -rw-r--r-- | src/qcam/format_converter.h | 7 |
2 files changed, 96 insertions, 10 deletions
diff --git a/src/qcam/format_converter.cpp b/src/qcam/format_converter.cpp index 192767c2..86b03b2c 100644 --- a/src/qcam/format_converter.cpp +++ b/src/qcam/format_converter.cpp @@ -31,6 +31,42 @@ int FormatConverter::configure(unsigned int format, unsigned int width, unsigned int height) { switch (format) { + case V4L2_PIX_FMT_NV12: + formatFamily_ = NV; + horzSubSample_ = 2; + vertSubSample_ = 2; + nvSwap_ = false; + break; + case V4L2_PIX_FMT_NV21: + formatFamily_ = NV; + horzSubSample_ = 2; + vertSubSample_ = 2; + nvSwap_ = true; + break; + case V4L2_PIX_FMT_NV16: + formatFamily_ = NV; + horzSubSample_ = 2; + vertSubSample_ = 1; + nvSwap_ = false; + break; + case V4L2_PIX_FMT_NV61: + formatFamily_ = NV; + horzSubSample_ = 2; + vertSubSample_ = 1; + nvSwap_ = true; + break; + case V4L2_PIX_FMT_NV24: + formatFamily_ = NV; + horzSubSample_ = 1; + vertSubSample_ = 1; + nvSwap_ = false; + break; + case V4L2_PIX_FMT_NV42: + formatFamily_ = NV; + horzSubSample_ = 1; + vertSubSample_ = 1; + nvSwap_ = true; + break; case V4L2_PIX_FMT_BGR24: formatFamily_ = RGB; r_pos_ = 2; @@ -99,9 +135,62 @@ void FormatConverter::convert(const unsigned char *src, size_t size, case RGB: convertRGB(src, dst->bits()); break; + case NV: + convertNV(src, dst->bits()); + break; }; } +static void yuv_to_rgb(int y, int u, int v, int *r, int *g, int *b) +{ + int c = y - 16; + int d = u - 128; + int e = v - 128; + *r = CLIP(( 298 * c + 409 * e + 128) >> RGBSHIFT); + *g = CLIP(( 298 * c - 100 * d - 208 * e + 128) >> RGBSHIFT); + *b = CLIP(( 298 * c + 516 * d + 128) >> RGBSHIFT); +} + +void FormatConverter::convertNV(const unsigned char *src, unsigned char *dst) +{ + unsigned int c_stride = width_ * (2 / horzSubSample_); + unsigned int c_inc = horzSubSample_ == 1 ? 2 : 0; + unsigned int cb_pos = nvSwap_ ? 1 : 0; + unsigned int cr_pos = nvSwap_ ? 0 : 1; + const unsigned char *src_c = src + width_ * height_; + int r, g, b; + + for (unsigned int y = 0; y < height_; y++) { + const unsigned char *src_y = src + y * width_; + const unsigned char *src_cb = src_c + (y / vertSubSample_) * + c_stride + cb_pos; + const unsigned char *src_cr = src_c + (y / vertSubSample_) * + c_stride + cr_pos; + + for (unsigned int x = 0; x < width_; x += 2) { + yuv_to_rgb(*src_y, *src_cb, *src_cr, &r, &g, &b); + dst[0] = b; + dst[1] = g; + dst[2] = r; + dst[3] = 0xff; + src_y++; + src_cb += c_inc; + src_cr += c_inc; + dst += 4; + + yuv_to_rgb(*src_y, *src_cb, *src_cr, &r, &g, &b); + dst[0] = b; + dst[1] = g; + dst[2] = r; + dst[3] = 0xff; + src_y++; + src_cb += 2; + src_cr += 2; + dst += 4; + } + } +} + void FormatConverter::convertRGB(const unsigned char *src, unsigned char *dst) { unsigned int x, y; @@ -124,16 +213,6 @@ void FormatConverter::convertRGB(const unsigned char *src, unsigned char *dst) } } -static void yuv_to_rgb(int y, int u, int v, int *r, int *g, int *b) -{ - int c = y - 16; - int d = u - 128; - int e = v - 128; - *r = CLIP(( 298 * c + 409 * e + 128) >> RGBSHIFT); - *g = CLIP(( 298 * c - 100 * d - 208 * e + 128) >> RGBSHIFT); - *b = CLIP(( 298 * c + 516 * d + 128) >> RGBSHIFT); -} - void FormatConverter::convertYUV(const unsigned char *src, unsigned char *dst) { unsigned int src_x, src_y, dst_x, dst_y; diff --git a/src/qcam/format_converter.h b/src/qcam/format_converter.h index bca44aa3..391e6a44 100644 --- a/src/qcam/format_converter.h +++ b/src/qcam/format_converter.h @@ -22,10 +22,12 @@ public: private: enum FormatFamily { MJPEG, + NV, RGB, YUV, }; + void convertNV(const unsigned char *src, unsigned char *dst); void convertRGB(const unsigned char *src, unsigned char *dst); void convertYUV(const unsigned char *src, unsigned char *dst); @@ -35,6 +37,11 @@ private: enum FormatFamily formatFamily_; + /* NV parameters */ + unsigned int horzSubSample_; + unsigned int vertSubSample_; + bool nvSwap_; + /* RGB parameters */ unsigned int bpp_; unsigned int r_pos_; |