jpeg: add new GstJpegHuffmanTables structure.

Add new GstJpegHuffmanTables helper structure to hold all possible
AC/DC Huffman tables available to all components.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
This commit is contained in:
Wind Yuan 2012-06-04 16:20:13 +08:00 committed by Gwenole Beauchesne
parent 4c5cc7eff9
commit 90e6532fd3
3 changed files with 137 additions and 124 deletions

View file

@ -131,105 +131,109 @@ default_quant_tables_zigzag[GST_JPEG_MAX_SCAN_COMPONENTS] = {
GST_JPEG_MAX_SCAN_COMPONENTS...GST_JPEG_MAX_SCAN_COMPONENTS*2-1, AC huffman tables
*/
static const
GstJpegHuffmanTable default_huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS*2] = {
/* DC luma */
{ { 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 }
GstJpegHuffmanTables default_huf_tables = {
{
/* DC luma */
{ { 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 }
},
/* DC chroma */
{ { 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 }
},
/* DC chroma */
{ { 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 }
},
{ { 0x0 },
{ 0x0 }
}
},
/* DC chroma */
{ { 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 }
},
/* DC chroma */
{ { 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 }
},
{ { 0 },
{ 0 }
},
/* AC luma */
{ { 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}
},
/* AC chroma */
{ { 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 }
},
/* AC chroma */
{ { 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 }
},
{ { 0 },
{ 0 }
{
/* AC luma */
{ { 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}
},
/* AC chroma */
{ { 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 }
},
/* AC chroma */
{ { 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 }
},
{ { 0x00 },
{ 0x00 }
}
}
};
@ -326,7 +330,7 @@ wrong_state:
GstJpegParserResult
gst_jpeg_parse_huffman_table (
GstJpegHuffmanTable huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS*2],
GstJpegHuffmanTables *huf_tables,
const guint8 * data, gsize size, guint offset)
{
GstByteReader bytes_reader = GST_BYTE_READER_INIT (data+offset, size-offset);
@ -346,9 +350,9 @@ gst_jpeg_parse_huffman_table (
CHECK_FAILED (table_index < GST_JPEG_MAX_SCAN_COMPONENTS,
GST_JPEG_PARSER_BROKEN_DATA);
if (is_dc) {
huf_table = &huf_tables[table_index];
huf_table = &huf_tables->dc_tables[table_index];
} else {
huf_table = &huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS + table_index];
huf_table = &huf_tables->ac_tables[table_index];
}
READ_BYTES (&bytes_reader, huf_table->huf_bits, 16);
value_count = 0;
@ -420,11 +424,12 @@ failed:
}
void
gst_jpeg_get_default_huffman_table (GstJpegHuffmanTable huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS*2])
gst_jpeg_get_default_huffman_table (GstJpegHuffmanTables *huf_tables)
{
g_assert(huf_tables);
memcpy(huf_tables,
default_huf_tables,
sizeof(GstJpegHuffmanTable)*GST_JPEG_MAX_SCAN_COMPONENTS*2);
&default_huf_tables,
sizeof(GstJpegHuffmanTables));
}
void

View file

@ -54,6 +54,7 @@ G_BEGIN_DECLS
typedef struct _GstJpegQuantTable GstJpegQuantTable;
typedef struct _GstJpegHuffmanTable GstJpegHuffmanTable;
typedef struct _GstJpegHuffmanTables GstJpegHuffmanTables;
typedef struct _GstJpegScanComponent GstJpegScanComponent;
typedef struct _GstJpegScanHdr GstJpegScanHdr;
typedef struct _GstJpegFrameComponent GstJpegFrameComponent;
@ -160,6 +161,20 @@ struct _GstJpegHuffmanTable
guint8 huf_values[256];
};
/**
* GstJpegHuffmanTables:
* @dc_tables: DC Huffman tables
* @ac_tables: AC Huffman tables
*
* Helper data structure that holds all AC/DC Huffman tables used to
* decode an image.
*/
struct _GstJpegHuffmanTables
{
GstJpegHuffmanTable dc_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
GstJpegHuffmanTable ac_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
};
/**
* GstJpegScanComponent:
* @component_selector: Scan component selector (Csj)
@ -343,17 +358,13 @@ GstJpegParserResult gst_jpeg_parse_quant_table (GstJpegQuantTable *quan
*
* Parses the JPEG Huffman table structure members from @data.
*
* Note: @huf_tables represents the user-allocated Huffman tables
* based on the number of scan components. That is, the parser writes
* the output Huffman table at the index specified by the Huffman
* table destination identifier (Th). The first array of
* <GST_JPEG_MAX_SCAN_COMPONENTS> Huffman tables are related
* to dc tables; The second array of <GST_JPEG_MAX_SCAN_COMPONENTS>
* of Huffman tables are related to ac tables.
* Note: @huf_tables represents the complete set of possible Huffman
* tables. However, the parser will only write to the Huffman table
* specified by the table destination identifier (Th).
*
* Returns: a #GstJpegParserResult
*/
GstJpegParserResult gst_jpeg_parse_huffman_table (GstJpegHuffmanTable huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS*2],
GstJpegParserResult gst_jpeg_parse_huffman_table (GstJpegHuffmanTables *huf_tables,
const guint8 * data,
gsize size,
guint offset);
@ -376,13 +387,10 @@ GstJpegParserResult gst_jpeg_parse_restart_interval (guint * interval,
* gst_jpeg_get_default_huffman_table:
* @huf_tables: (out): The default dc/ac hufman tables to fill in
*
* DC huffman tables fill in the first 4 arrays.
* AC huffman tables fill in the last 4 arrays.
*
* Returns: void
*/
void gst_jpeg_get_default_huffman_table (
GstJpegHuffmanTable huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS*2]);
GstJpegHuffmanTables *huf_tables);
/**
* gst_jpeg_get_default_quantization_table:

View file

@ -51,7 +51,7 @@ struct _GstVaapiDecoderJpegPrivate {
guint height;
GstVaapiPicture *current_picture;
GstJpegFrameHdr frame_hdr;
GstJpegHuffmanTable huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS*2];
GstJpegHuffmanTables huf_tables;
GstJpegQuantTable quant_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
gboolean has_huf_table;
gboolean has_quant_table;
@ -257,7 +257,7 @@ fill_huffman_table(
guint i;
if (!priv->has_huf_table)
gst_jpeg_get_default_huffman_table(priv->huf_tables);
gst_jpeg_get_default_huffman_table(&priv->huf_tables);
picture->huf_table = GST_VAAPI_HUFFMAN_TABLE_NEW(JPEG, decoder);
g_assert(picture->huf_table);
@ -265,16 +265,16 @@ fill_huffman_table(
memset(huffman_table, 0, sizeof(VAHuffmanTableBufferJPEG));
for (i = 0; i < GST_JPEG_MAX_SCAN_COMPONENTS; i++) {
memcpy(huffman_table->huffman_table[i].dc_bits,
priv->huf_tables[i].huf_bits,
priv->huf_tables.dc_tables[i].huf_bits,
16);
memcpy(huffman_table->huffman_table[i].dc_huffval,
priv->huf_tables[i].huf_values,
priv->huf_tables.dc_tables[i].huf_values,
16);
memcpy(huffman_table->huffman_table[i].ac_bits,
priv->huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS + i].huf_bits,
priv->huf_tables.ac_tables[i].huf_bits,
16);
memcpy(huffman_table->huffman_table[i].ac_huffval,
priv->huf_tables[GST_JPEG_MAX_SCAN_COMPONENTS + i].huf_values,
priv->huf_tables.ac_tables[i].huf_values,
256);
}
return TRUE;
@ -378,7 +378,7 @@ decode_huffman_table(
GstJpegParserResult result;
result = gst_jpeg_parse_huffman_table(
priv->huf_tables,
&priv->huf_tables,
buf, buf_size, 0
);
if (result != GST_JPEG_PARSER_OK) {
@ -650,7 +650,7 @@ gst_vaapi_decoder_jpeg_init(GstVaapiDecoderJpeg *decoder)
priv->profile_changed = TRUE;
priv->is_constructed = FALSE;
memset(&priv->frame_hdr, 0, sizeof(priv->frame_hdr));
memset(priv->huf_tables, 0, sizeof(priv->huf_tables));
memset(&priv->huf_tables, 0, sizeof(priv->huf_tables));
memset(priv->quant_tables, 0, sizeof(priv->quant_tables));
}