Commit 989643ff authored by Sreerenj Balachandran's avatar Sreerenj Balachandran Committed by Sebastian Dröge

codecparsers: h265: add helpers to convert quantization matrices

Add utility functions to convert quantization matrices from zig-zag scan
order into raster scan order and vice-versa

https://bugzilla.gnome.org/show_bug.cgi?id=747613
parent a86e7c1c
......@@ -131,6 +131,24 @@ static const guint8 default_scaling_list2[64] = {
54, 71, 71, 91
};
static const guint8 zigzag_4x4[16] = {
0, 1, 4, 8,
5, 2, 3, 6,
9, 12, 13, 10,
7, 11, 14, 15,
};
static const guint8 zigzag_8x8[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
};
typedef struct
{
guint par_n, par_d;
......@@ -2385,3 +2403,103 @@ gst_h265_sei_free (GstH265SEIMessage * sei)
pic_timing->du_cpb_removal_delay_increment_minus1 = 0;
}
}
/**
* gst_h265_quant_matrix_4x4_get_zigzag_from_raster:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from raster scan order to
* zigzag scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.6
*/
void
gst_h265_quant_matrix_4x4_get_zigzag_from_raster (guint8 out_quant[16],
const guint8 quant[16])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 16; i++)
out_quant[i] = quant[zigzag_4x4[i]];
}
/**
* gst_h265_quant_matrix_4x4_get_raster_from_zigzag:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from zigzag scan order to
* raster scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.6
*/
void
gst_h265_quant_matrix_4x4_get_raster_from_zigzag (guint8 out_quant[16],
const guint8 quant[16])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 16; i++)
out_quant[zigzag_4x4[i]] = quant[i];
}
/**
* gst_h265_quant_matrix_8x8_get_zigzag_from_raster:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from raster scan order to
* zigzag scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.6
*/
void
gst_h265_quant_matrix_8x8_get_zigzag_from_raster (guint8 out_quant[64],
const guint8 quant[64])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 64; i++)
out_quant[i] = quant[zigzag_8x8[i]];
}
/**
* gst_h265_quant_matrix_8x8_get_raster_from_zigzag:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from zigzag scan order to
* raster scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.6
*/
void
gst_h265_quant_matrix_8x8_get_raster_from_zigzag (guint8 out_quant[64],
const guint8 quant[64])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 64; i++)
out_quant[zigzag_8x8[i]] = quant[i];
}
......@@ -1061,5 +1061,26 @@ gboolean gst_h265_sei_copy (GstH265SEIMessage * dest_sei,
void gst_h265_sei_free (GstH265SEIMessage * sei);
void gst_h265_quant_matrix_4x4_get_zigzag_from_raster (guint8 out_quant[16],
const guint8 quant[16]);
void gst_h265_quant_matrix_4x4_get_raster_from_zigzag (guint8 out_quant[16],
const guint8 quant[16]);
void gst_h265_quant_matrix_8x8_get_zigzag_from_raster (guint8 out_quant[64],
const guint8 quant[64]);
void gst_h265_quant_matrix_8x8_get_raster_from_zigzag (guint8 out_quant[64],
const guint8 quant[64]);
#define gst_h265_quant_matrix_16x16_get_zigzag_from_raster \
gst_h265_quant_matrix_8x8_get_zigzag_from_raster
#define gst_h265_quant_matrix_16x16_get_raster_from_zigzag \
gst_h265_quant_matrix_8x8_get_raster_from_zigzag
#define gst_h265_quant_matrix_32x32_get_zigzag_from_raster \
gst_h265_quant_matrix_8x8_get_zigzag_from_raster
#define gst_h265_quant_matrix_32x32_get_raster_from_zigzag \
gst_h265_quant_matrix_8x8_get_raster_from_zigzag
G_END_DECLS
#endif
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