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Add support for RGB565 images in qrio

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Most cameras produce RGB565_SWAPPED data
This commit is contained in:
Jeff Epler 2022-08-10 11:13:26 -05:00
parent 86f9d98a5d
commit 5168f6ec1f
3 changed files with 26 additions and 1 deletions
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10
shared-bindings/qrio/PixelPolicy.c
View File

@ -39,13 +39,23 @@
//| ODD_BYTES: PixelPolicy
//| """The input buffer to `QRDecoder.decode` consists of greyscale values in positions 1, 3, …, and ignored bytes in positions 0, 2, …. This can decode directly from YUV images where the odd bytes hold the Y (luminance) data"""
//|
//| RGB565_SWAPPED: PixelPolicy
//| """The input buffer to `QRDecoder.decode` consists of RGB565 values in byte-swapped order. The green component is used."""
//|
//| RGB565: PixelPolicy
//| """The input buffer to `QRDecoder.decode` consists of RGB565 values. The green component is used."""
//|
MAKE_ENUM_VALUE(qrio_pixel_policy_type, qrio_pixel_policy, EVERY_BYTE, QRIO_EVERY_BYTE);
MAKE_ENUM_VALUE(qrio_pixel_policy_type, qrio_pixel_policy, RGB565, QRIO_RGB565);
MAKE_ENUM_VALUE(qrio_pixel_policy_type, qrio_pixel_policy, RGB565_SWAPPED, QRIO_RGB565_SWAPPED);
MAKE_ENUM_VALUE(qrio_pixel_policy_type, qrio_pixel_policy, EVEN_BYTES, QRIO_EVEN_BYTES);
MAKE_ENUM_VALUE(qrio_pixel_policy_type, qrio_pixel_policy, ODD_BYTES, QRIO_EVEN_BYTES);
MAKE_ENUM_MAP(qrio_pixel_policy) {
MAKE_ENUM_MAP_ENTRY(qrio_pixel_policy, EVERY_BYTE),
MAKE_ENUM_MAP_ENTRY(qrio_pixel_policy, RGB565),
MAKE_ENUM_MAP_ENTRY(qrio_pixel_policy, RGB565_SWAPPED),
MAKE_ENUM_MAP_ENTRY(qrio_pixel_policy, EVEN_BYTES),
MAKE_ENUM_MAP_ENTRY(qrio_pixel_policy, ODD_BYTES),
};

2
shared-bindings/qrio/PixelPolicy.h
View File

@ -33,7 +33,7 @@
extern const mp_obj_type_t qrio_pixel_policy_type;
typedef enum {
QRIO_EVERY_BYTE, QRIO_EVEN_BYTES, QRIO_ODD_BYTES
QRIO_EVERY_BYTE, QRIO_EVEN_BYTES, QRIO_ODD_BYTES, QRIO_RGB565, QRIO_RGB565_SWAPPED
} qrio_pixel_policy_t;
extern const cp_enum_obj_t qrio_pixel_policy_EVERY_BYTE_obj;

15
shared-module/qrio/QRDecoder.c
View File

@ -104,6 +104,20 @@ mp_obj_t shared_module_qrio_qrdecoder_decode(qrdecoder_qrdecoder_obj_t *self, co
uint8_t *src = bufinfo->buf;
switch (policy) {
case QRIO_RGB565: {
uint16_t *src16 = bufinfo->buf;
for (int i = 0; i < width * height; i++) {
framebuffer[i] = (src16[i] >> 3) & 0xfc;
}
break;
}
case QRIO_RGB565_SWAPPED: {
uint16_t *src16 = bufinfo->buf;
for (int i = 0; i < width * height; i++) {
framebuffer[i] = (__builtin_bswap16(src16[i]) >> 3) & 0xfc;
}
break;
}
case QRIO_EVERY_BYTE:
memcpy(framebuffer, src, width * height);
break;
@ -116,6 +130,7 @@ mp_obj_t shared_module_qrio_qrdecoder_decode(qrdecoder_qrdecoder_obj_t *self, co
for (int i = 0; i < width * height; i++) {
framebuffer[i] = src[2 * i];
}
break;
}
quirc_end(self->quirc);