Searched refs:subsampling (Results 1 – 13 of 13) sorted by relevance
| /linux/Documentation/userspace-api/media/v4l/ |
| A D | yuv-formats.rst | 26 differences, is called chroma subsampling.
28 While many combinations of subsampling factors in the horizontal and vertical
29 direction are possible, common factors are 1 (no subsampling), 2 and 4, with
30 horizontal subsampling always larger than or equal to vertical subsampling.
33 - `4:4:4`: No subsampling
34 - `4:2:2`: Horizontal subsampling by 2, no vertical subsampling
35 - `4:2:0`: Horizontal subsampling by 2, vertical subsampling by 2
36 - `4:1:1`: Horizontal subsampling by 4, no vertical subsampling
37 - `4:1:0`: Horizontal subsampling by 4, vertical subsampling by 4
59 .. flat-table:: 4:2:2 subsampling, interstitially sited
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| A D | ext-ctrls-jpeg.rst | 26 The chroma subsampling factors describe how each component of an
40 - No chroma subsampling, each pixel has Y, Cr and Cb values.
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| A D | pixfmt-yuv-planar.rst | 42 subsampling, the chroma line stride (in bytes) is thus equal to twice the luma
43 line stride. With horizontal subsampling by 2, the chroma line stride is equal
44 to the luma line stride. Vertical subsampling doesn't affect the line stride.
499 formats. The two chroma planes always use the same subsampling.
504 horizontal subsampling factor. Vertical subsampling doesn't affect the line
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| A D | pixfmt-m420.rst | 16 M420 is a YUV format with ½ horizontal and vertical chroma subsampling
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| A D | pixfmt-packed-yuv.rst | 10 Cr components consecutively in memory. They may apply subsampling to the chroma
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| /linux/drivers/media/platform/s5p-jpeg/ |
| A D | jpeg-core.c | 537 switch (ctx->subsampling) { in s5p_jpeg_adjust_fourcc_to_subsampling()
593 if (ctx->subsampling > 2) in s5p_jpeg_to_user_subsampling()
595 return ctx->subsampling; in s5p_jpeg_to_user_subsampling()
599 if (ctx->subsampling > 3) in s5p_jpeg_to_user_subsampling()
604 if (ctx->subsampling > 2) in s5p_jpeg_to_user_subsampling()
1078 switch (subsampling) { in s5p_jpeg_subsampling_decode()
1163 subsampling = 0x33; in s5p_jpeg_parse_hdr()
1500 (fmt->subsampling < ctx->subsampling)) { in s5p_jpeg_try_fmt_vid_cap()
2225 ctx->subsampling); in exynos4_jpeg_device_run()
2252 ctx->subsampling); in exynos4_jpeg_device_run()
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| A D | jpeg-core.h | 169 int subsampling; member
231 unsigned short subsampling; member
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| /linux/drivers/media/platform/ |
| A D | rcar_jpu.c | 229 unsigned char subsampling; member
249 u8 subsampling; member
1084 u8 subsampling = jpu_parse_hdr(buffer, buf_size, &width, in jpu_buf_queue() local
1088 if (subsampling != JPU_JPEG_422 && subsampling != JPU_JPEG_420) in jpu_buf_queue()
1108 jpu_buf->subsampling = subsampling; in jpu_buf_queue()
1144 *(buffer + JPU_JPEG_SUBS_OFFSET) = q_data->fmtinfo->subsampling; in jpu_buf_finish()
1355 unsigned char num_planes, subsampling; in jpu_device_run() local
1383 subsampling = q_data->fmtinfo->subsampling; in jpu_device_run()
1400 if (subsampling == JPU_JPEG_420) { in jpu_device_run()
1447 if (jpu_buf->subsampling != subsampling) { in jpu_device_run()
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| /linux/drivers/media/platform/imx-jpeg/ |
| A D | mxc-jpeg.c | 70 .subsampling = -1,
78 .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444,
89 .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444,
100 .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_420,
111 .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_422,
122 .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444,
133 .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY,
1152 if (mxc_formats[i].subsampling == header->frame.subsampling && in mxc_jpeg_get_image_format()
1160 header->frame.subsampling); in mxc_jpeg_get_image_format()
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| A D | mxc-jpeg.h | 56 enum v4l2_jpeg_chroma_subsampling subsampling; member
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| /linux/include/media/ |
| A D | v4l2-jpeg.h | 62 enum v4l2_jpeg_chroma_subsampling subsampling; member
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| /linux/drivers/media/platform/coda/ |
| A D | coda-jpeg.c | 395 switch (header.frame.subsampling) { in coda_jpeg_decode_header()
398 ctx->params.jpeg_chroma_subsampling = header.frame.subsampling; in coda_jpeg_decode_header()
402 header.frame.subsampling); in coda_jpeg_decode_header()
955 static unsigned char subsampling[5][3] = { in coda9_jpeg_encode_header() local
967 ret = coda_jpeg_put_byte(subsampling[chroma_format][i], in coda9_jpeg_encode_header()
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| /linux/drivers/media/v4l2-core/ |
| A D | v4l2-jpeg.c | 227 frame_header->subsampling = subs; in jpeg_parse_frame_header()
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