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112 lines
3.5 KiB
112 lines
3.5 KiB
/* |
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* SoC-camera Media Bus API extensions |
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* |
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* Copyright (C) 2009, Guennadi Liakhovetski <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#ifndef SOC_MEDIABUS_H |
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#define SOC_MEDIABUS_H |
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#include <linux/videodev2.h> |
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#include <linux/v4l2-mediabus.h> |
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/** |
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* enum soc_mbus_packing - data packing types on the media-bus |
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* @SOC_MBUS_PACKING_NONE: no packing, bit-for-bit transfer to RAM, one |
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* sample represents one pixel |
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* @SOC_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the |
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* possibly incomplete byte high bits are padding |
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* @SOC_MBUS_PACKING_2X8_PADLO: as above, but low bits are padding |
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* @SOC_MBUS_PACKING_EXTEND16: sample width (e.g., 10 bits) has to be extended |
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* to 16 bits |
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* @SOC_MBUS_PACKING_VARIABLE: compressed formats with variable packing |
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* @SOC_MBUS_PACKING_1_5X8: used for packed YUV 4:2:0 formats, where 4 |
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* pixels occupy 6 bytes in RAM |
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* @SOC_MBUS_PACKING_EXTEND32: sample width (e.g., 24 bits) has to be extended |
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* to 32 bits |
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*/ |
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enum soc_mbus_packing { |
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SOC_MBUS_PACKING_NONE, |
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SOC_MBUS_PACKING_2X8_PADHI, |
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SOC_MBUS_PACKING_2X8_PADLO, |
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SOC_MBUS_PACKING_EXTEND16, |
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SOC_MBUS_PACKING_VARIABLE, |
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SOC_MBUS_PACKING_1_5X8, |
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SOC_MBUS_PACKING_EXTEND32, |
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}; |
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/** |
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* enum soc_mbus_order - sample order on the media bus |
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* @SOC_MBUS_ORDER_LE: least significant sample first |
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* @SOC_MBUS_ORDER_BE: most significant sample first |
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*/ |
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enum soc_mbus_order { |
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SOC_MBUS_ORDER_LE, |
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SOC_MBUS_ORDER_BE, |
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}; |
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/** |
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* enum soc_mbus_layout - planes layout in memory |
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* @SOC_MBUS_LAYOUT_PACKED: color components packed |
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* @SOC_MBUS_LAYOUT_PLANAR_2Y_U_V: YUV components stored in 3 planes (4:2:2) |
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* @SOC_MBUS_LAYOUT_PLANAR_2Y_C: YUV components stored in a luma and a |
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* chroma plane (C plane is half the size |
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* of Y plane) |
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* @SOC_MBUS_LAYOUT_PLANAR_Y_C: YUV components stored in a luma and a |
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* chroma plane (C plane is the same size |
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* as Y plane) |
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*/ |
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enum soc_mbus_layout { |
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SOC_MBUS_LAYOUT_PACKED = 0, |
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SOC_MBUS_LAYOUT_PLANAR_2Y_U_V, |
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SOC_MBUS_LAYOUT_PLANAR_2Y_C, |
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SOC_MBUS_LAYOUT_PLANAR_Y_C, |
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}; |
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/** |
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* struct soc_mbus_pixelfmt - Data format on the media bus |
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* @name: Name of the format |
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* @fourcc: Fourcc code, that will be obtained if the data is |
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* stored in memory in the following way: |
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* @packing: Type of sample-packing, that has to be used |
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* @order: Sample order when storing in memory |
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* @bits_per_sample: How many bits the bridge has to sample |
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*/ |
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struct soc_mbus_pixelfmt { |
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const char *name; |
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u32 fourcc; |
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enum soc_mbus_packing packing; |
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enum soc_mbus_order order; |
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enum soc_mbus_layout layout; |
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u8 bits_per_sample; |
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}; |
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/** |
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* struct soc_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through |
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* @code: mediabus pixel-code |
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* @fmt: pixel format description |
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*/ |
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struct soc_mbus_lookup { |
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u32 code; |
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struct soc_mbus_pixelfmt fmt; |
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}; |
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const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc( |
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u32 code, |
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const struct soc_mbus_lookup *lookup, |
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int n); |
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const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc( |
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u32 code); |
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s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf); |
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s32 soc_mbus_image_size(const struct soc_mbus_pixelfmt *mf, |
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u32 bytes_per_line, u32 height); |
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int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf, |
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unsigned int *numerator, unsigned int *denominator); |
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unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg, |
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unsigned int flags); |
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#endif
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