Add reference quantization and huffman tables to a global header file so that they can be re-used by other JPEG drivers. These are example tables provided in ITU-T.81 as reference. The JPEG encoders are free to use either these or their own proprietary tables. These tables are being used already by verisilicon driver [1]. Also add necessary prefixes to be used for huffman tables in global header file. [1] : https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/media/platform/verisilicon/hantro_jpeg.c?h=v6.8-rc2#n30 Signed-off-by: Devarsh Thakkar <devarsht@xxxxxx> --- V1->V4 : No change (Introduced in v4) --- include/media/jpeg.h | 4 ++ include/media/jpeg_enc_reftables.h | 112 +++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+) create mode 100644 include/media/jpeg_enc_reftables.h diff --git a/include/media/jpeg.h b/include/media/jpeg.h index a01e142e99a7..e07b20ef8665 100644 --- a/include/media/jpeg.h +++ b/include/media/jpeg.h @@ -16,5 +16,9 @@ #define JPEG_MARKER_DHP 0xde #define JPEG_MARKER_APP0 0xe0 #define JPEG_MARKER_COM 0xfe +#define JPEG_LUM_HT 0x00 +#define JPEG_CHR_HT 0x01 +#define JPEG_DC_HT 0x00 +#define JPEG_AC_HT 0x10 #endif /* _MEDIA_JPEG_H_ */ diff --git a/include/media/jpeg_enc_reftables.h b/include/media/jpeg_enc_reftables.h new file mode 100644 index 000000000000..91959907113f --- /dev/null +++ b/include/media/jpeg_enc_reftables.h @@ -0,0 +1,112 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Reference quantization, zig-zag scan and huffman tables as shared in ITU-T.81 */ + +#ifndef _MEDIA_JPEG_ENC_REF_H_ +#define _MEDIA_JPEG_ENC_REF_H_ + +/* Luma and chroma qp table to acheive 50% compression quality + * This is as per example in Annex K.1 of ITU-T.81 + */ +static const u8 luma_q_table[64] = { + 16, 11, 10, 16, 24, 40, 51, 61, + 12, 12, 14, 19, 26, 58, 60, 55, + 14, 13, 16, 24, 40, 57, 69, 56, + 14, 17, 22, 29, 51, 87, 80, 62, + 18, 22, 37, 56, 68, 109, 103, 77, + 24, 35, 55, 64, 81, 104, 113, 92, + 49, 64, 78, 87, 103, 121, 120, 101, + 72, 92, 95, 98, 112, 100, 103, 99 +}; + +static const u8 chroma_q_table[64] = { + 17, 18, 24, 47, 99, 99, 99, 99, + 18, 21, 26, 66, 99, 99, 99, 99, + 24, 26, 56, 99, 99, 99, 99, 99, + 47, 66, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99 +}; + +/* Zigzag scan pattern */ +static const u8 zigzag[64] = { + 0, 1, 8, 16, 9, 2, 3, 10, + 17, 24, 32, 25, 18, 11, 4, 5, + 12, 19, 26, 33, 40, 48, 41, 34, + 27, 20, 13, 6, 7, 14, 21, 28, + 35, 42, 49, 56, 57, 50, 43, 36, + 29, 22, 15, 23, 30, 37, 44, 51, + 58, 59, 52, 45, 38, 31, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63 +}; + +/* + * Contains the data that needs to be sent in the marker segment of an interchange format JPEG + * stream or an abbreviated format table specification data stream. + * Specifies the huffman table used for encoding the luminance DC coefficient differences. + * The table represents Table K.3 of ITU-T.81 + */ +static const u8 luma_dc_table[] = { + 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B +}; + +/* + * Contains the data that needs to be sent in the marker segment of an interchange format JPEG + * stream or an abbreviated format table specification data stream. + * Specifies the huffman table used for encoding the luminance AC coefficients. + * The table represents Table K.5 of ITU-T.81 + */ +static const u8 luma_ac_table[] = { + 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, + 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, + 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, + 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, + 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, + 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, + 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, + 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, + 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, + 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, + 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, + 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, + 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA +}; + +/* + * Contains the data that needs to be sent in the marker segment of an interchange format JPEG + * stream or an abbreviated format table specification data stream. + * Specifies the huffman table used for encoding the chrominance DC coefficient differences. + * The table represents Table K.4 of ITU-T.81 + */ +static const u8 chroma_dc_table[] = { + 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, + 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B +}; + +/* + * Contains the data that needs to be sent in the marker segment of an interchange format JPEG + * stream or an abbreviated format table specification data stream. + * Specifies the huffman table used for encoding the chrominance AC coefficients. + * The table represents Table K.6 of ITU-T.81 + */ +static const u8 chroma_ac_table[] = { + 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, + 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, + 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, + 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, + 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, + 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, + 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, + 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, + 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, + 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, + 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, + 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, + 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA +}; + +#endif /* _MEDIA_JPEG_ENC_REF_H_ */ -- 2.34.1
