summaryrefslogtreecommitdiff
path: root/drivers/media/platform/coda/coda-jpeg.c
blob: 11e734bc2cbd53bcd483c706006fb682ab983bdb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
 * Coda multi-standard codec IP - JPEG support functions
 *
 * Copyright (C) 2014 Philipp Zabel, Pengutronix
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/swab.h>

#include "coda.h"
#include "trace.h"

#define SOI_MARKER	0xffd8
#define EOI_MARKER	0xffd9

/*
 * Typical Huffman tables for 8-bit precision luminance and
 * chrominance from JPEG ITU-T.81 (ISO/IEC 10918-1) Annex K.3
 */

static const unsigned char luma_dc_bits[16] = {
	0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

static const unsigned char luma_dc_value[12] = {
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b,
};

static const unsigned char chroma_dc_bits[16] = {
	0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
};

static const unsigned char chroma_dc_value[12] = {
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b,
};

static const unsigned char luma_ac_bits[16] = {
	0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03,
	0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7d,
};

static const unsigned char luma_ac_value[162 + 2] = {
	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, /* padded to 32-bit */
};

static const unsigned char chroma_ac_bits[16] = {
	0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04,
	0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77,
};

static const unsigned char chroma_ac_value[162 + 2] = {
	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, /* padded to 32-bit */
};

/*
 * Quantization tables for luminance and chrominance components in
 * zig-zag scan order from the Freescale i.MX VPU libaries
 */

static unsigned char luma_q[64] = {
	0x06, 0x04, 0x04, 0x04, 0x05, 0x04, 0x06, 0x05,
	0x05, 0x06, 0x09, 0x06, 0x05, 0x06, 0x09, 0x0b,
	0x08, 0x06, 0x06, 0x08, 0x0b, 0x0c, 0x0a, 0x0a,
	0x0b, 0x0a, 0x0a, 0x0c, 0x10, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x10, 0x0c, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
};

static unsigned char chroma_q[64] = {
	0x07, 0x07, 0x07, 0x0d, 0x0c, 0x0d, 0x18, 0x10,
	0x10, 0x18, 0x14, 0x0e, 0x0e, 0x0e, 0x14, 0x14,
	0x0e, 0x0e, 0x0e, 0x0e, 0x14, 0x11, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x11, 0x11, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x11, 0x0c, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
};

struct coda_memcpy_desc {
	int offset;
	const void *src;
	size_t len;
};

static void coda_memcpy_parabuf(void *parabuf,
				const struct coda_memcpy_desc *desc)
{
	u32 *dst = parabuf + desc->offset;
	const u32 *src = desc->src;
	int len = desc->len / 4;
	int i;

	for (i = 0; i < len; i += 2) {
		dst[i + 1] = swab32(src[i]);
		dst[i] = swab32(src[i + 1]);
	}
}

int coda_jpeg_write_tables(struct coda_ctx *ctx)
{
	int i;
	static const struct coda_memcpy_desc huff[8] = {
		{ 0,   luma_dc_bits,    sizeof(luma_dc_bits)    },
		{ 16,  luma_dc_value,   sizeof(luma_dc_value)   },
		{ 32,  luma_ac_bits,    sizeof(luma_ac_bits)    },
		{ 48,  luma_ac_value,   sizeof(luma_ac_value)   },
		{ 216, chroma_dc_bits,  sizeof(chroma_dc_bits)  },
		{ 232, chroma_dc_value, sizeof(chroma_dc_value) },
		{ 248, chroma_ac_bits,  sizeof(chroma_ac_bits)  },
		{ 264, chroma_ac_value, sizeof(chroma_ac_value) },
	};
	struct coda_memcpy_desc qmat[3] = {
		{ 512, ctx->params.jpeg_qmat_tab[0], 64 },
		{ 576, ctx->params.jpeg_qmat_tab[1], 64 },
		{ 640, ctx->params.jpeg_qmat_tab[1], 64 },
	};

	/* Write huffman tables to parameter memory */
	for (i = 0; i < ARRAY_SIZE(huff); i++)
		coda_memcpy_parabuf(ctx->parabuf.vaddr, huff + i);

	/* Write Q-matrix to parameter memory */
	for (i = 0; i < ARRAY_SIZE(qmat); i++)
		coda_memcpy_parabuf(ctx->parabuf.vaddr, qmat + i);

	return 0;
}

bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_buffer *vb)
{
	void *vaddr = vb2_plane_vaddr(vb, 0);
	u16 soi = be16_to_cpup((__be16 *)vaddr);
	u16 eoi = be16_to_cpup((__be16 *)(vaddr +
					  vb2_get_plane_payload(vb, 0) - 2));

	return soi == SOI_MARKER && eoi == EOI_MARKER;
}

/*
 * Scale quantization table using nonlinear scaling factor
 * u8 qtab[64], scale [50,190]
 */
static void coda_scale_quant_table(u8 *q_tab, int scale)
{
	unsigned int temp;
	int i;

	for (i = 0; i < 64; i++) {
		temp = DIV_ROUND_CLOSEST((unsigned int)q_tab[i] * scale, 100);
		if (temp <= 0)
			temp = 1;
		if (temp > 255)
			temp = 255;
		q_tab[i] = (unsigned char)temp;
	}
}

void coda_set_jpeg_compression_quality(struct coda_ctx *ctx, int quality)
{
	unsigned int scale;

	ctx->params.jpeg_quality = quality;

	/* Clip quality setting to [5,100] interval */
	if (quality > 100)
		quality = 100;
	if (quality < 5)
		quality = 5;

	/*
	 * Non-linear scaling factor:
	 * [5,50] -> [1000..100], [51,100] -> [98..0]
	 */
	if (quality < 50)
		scale = 5000 / quality;
	else
		scale = 200 - 2 * quality;

	if (ctx->params.jpeg_qmat_tab[0]) {
		memcpy(ctx->params.jpeg_qmat_tab[0], luma_q, 64);
		coda_scale_quant_table(ctx->params.jpeg_qmat_tab[0], scale);
	}
	if (ctx->params.jpeg_qmat_tab[1]) {
		memcpy(ctx->params.jpeg_qmat_tab[1], chroma_q, 64);
		coda_scale_quant_table(ctx->params.jpeg_qmat_tab[1], scale);
	}
}