0x48, 0x5c, 0x5f, 0x62, 0x70, 0x64, 0x67, 0x63
};
+static unsigned char luma_q_table_reordered[ARRAY_SIZE(luma_q_table)];
+
static const unsigned char chroma_q_table[] = {
0x11, 0x12, 0x18, 0x2f, 0x63, 0x63, 0x63, 0x63,
0x12, 0x15, 0x1a, 0x42, 0x63, 0x63, 0x63, 0x63,
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63
};
+static unsigned char chroma_q_table_reordered[ARRAY_SIZE(chroma_q_table)];
+
+static const unsigned char 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
+};
+
+static const u32 hw_reorder[64] = {
+ 0, 8, 16, 24, 1, 9, 17, 25,
+ 32, 40, 48, 56, 33, 41, 49, 57,
+ 2, 10, 18, 26, 3, 11, 19, 27,
+ 34, 42, 50, 58, 35, 43, 51, 59,
+ 4, 12, 20, 28, 5, 13, 21, 29,
+ 36, 44, 52, 60, 37, 45, 53, 61,
+ 6, 14, 22, 30, 7, 15, 23, 31,
+ 38, 46, 54, 62, 39, 47, 55, 63
+};
+
/* Huffman tables are shared with CODA */
static const unsigned char luma_dc_table[] = {
0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01,
0x11, 0x03, 0x11, 0x00, 0x3f, 0x00,
};
+static unsigned char jpeg_scale_qp(const unsigned char qp, int scale)
+{
+ unsigned int temp;
+
+ temp = DIV_ROUND_CLOSEST((unsigned int)qp * scale, 100);
+ if (temp <= 0)
+ temp = 1;
+ if (temp > 255)
+ temp = 255;
+
+ return (unsigned char)temp;
+}
+
static void
-jpeg_scale_quant_table(unsigned char *q_tab,
+jpeg_scale_quant_table(unsigned char *file_q_tab,
+ unsigned char *reordered_q_tab,
const unsigned char *tab, int scale)
{
- unsigned int temp;
int i;
for (i = 0; i < 64; i++) {
- temp = DIV_ROUND_CLOSEST((unsigned int)tab[i] * scale, 100);
- if (temp <= 0)
- temp = 1;
- if (temp > 255)
- temp = 255;
- q_tab[i] = (unsigned char)temp;
+ file_q_tab[i] = jpeg_scale_qp(tab[zigzag[i]], scale);
+ reordered_q_tab[i] = jpeg_scale_qp(tab[hw_reorder[i]], scale);
}
}
scale = 200 - 2 * quality;
jpeg_scale_quant_table(buffer + LUMA_QUANT_OFF,
+ luma_q_table_reordered,
luma_q_table, scale);
jpeg_scale_quant_table(buffer + CHROMA_QUANT_OFF,
+ chroma_q_table_reordered,
chroma_q_table, scale);
}
-unsigned char *
-hantro_jpeg_get_qtable(struct hantro_jpeg_ctx *ctx, int index)
+unsigned char *hantro_jpeg_get_qtable(int index)
{
if (index == 0)
- return ctx->buffer + LUMA_QUANT_OFF;
- return ctx->buffer + CHROMA_QUANT_OFF;
+ return luma_q_table_reordered;
+ return chroma_q_table_reordered;
}
void hantro_jpeg_header_assemble(struct hantro_jpeg_ctx *ctx)