};
/* *INDENT-ON* */
-/* Table K.3: typical Huffman tables for 8-bit precision luminance and chrominance */
+typedef struct _GstJpegHuffmanTableEntry GstJpegHuffmanTableEntry;
+struct _GstJpegHuffmanTableEntry
+{
+ guint8 value; /* category */
+ guint8 length; /* code length in bits */
+};
+
+/* Table K.3 - Table for luminance DC coefficient differences */
+static const GstJpegHuffmanTableEntry default_luminance_dc_table[] = {
+ {0x00, 2}, {0x01, 3}, {0x02, 3}, {0x03, 3}, {0x04, 3}, {0x05, 3},
+ {0x06, 4}, {0x07, 5}, {0x08, 6}, {0x09, 7}, {0x0a, 8}, {0x0b, 9}
+};
+
+/* Table K.4 - Table for chrominance DC coefficient differences */
+static const GstJpegHuffmanTableEntry default_chrominance_dc_table[] = {
+ {0x00, 2}, {0x01, 2}, {0x02, 2}, {0x03, 3}, {0x04, 4}, {0x05, 5},
+ {0x06, 6}, {0x07, 7}, {0x08, 8}, {0x09, 9}, {0x0a, 10}, {0x0b, 11}
+};
+
+/* Table K.5 - Table for luminance AC coefficients */
/* *INDENT-OFF* */
-static const GstJpegHuffmanTables default_huf_tables = {
- .dc_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},
- TRUE},
- /* 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},
- TRUE},
- /* 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},
- TRUE},
- {{0x0,},
- {0x0,}
- }
- },
- .ac_tables = {
- /* 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},
- TRUE},
- /* 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},
- TRUE},
- /* 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},
- TRUE},
- {{0x00,},
- {0x00,}
- }
- }
+static const GstJpegHuffmanTableEntry default_luminance_ac_table[] = {
+ {0x00, 4}, {0x01, 2}, {0x02, 2}, {0x03, 3}, {0x04, 4}, {0x05, 5},
+ {0x06, 7}, {0x07, 8}, {0x08, 10}, {0x09, 16}, {0x0a, 16}, {0x11, 4},
+ {0x12, 5}, {0x13, 7}, {0x14, 9}, {0x15, 11}, {0x16, 16}, {0x17, 16},
+ {0x18, 16}, {0x19, 16}, {0x1a, 16}, {0x21, 5}, {0x22, 8}, {0x23, 10},
+ {0x24, 12}, {0x25, 16}, {0x26, 16}, {0x27, 16}, {0x28, 16}, {0x29, 16},
+ {0x2a, 16}, {0x31, 6}, {0x32, 9}, {0x33, 12}, {0x34, 16}, {0x35, 16},
+ {0x36, 16}, {0x37, 16}, {0x38, 16}, {0x39, 16}, {0x3a, 16}, {0x41, 6},
+ {0x42, 10}, {0x43, 16}, {0x44, 16}, {0x45, 16}, {0x46, 16}, {0x47, 16},
+ {0x48, 16}, {0x49, 16}, {0x4a, 16}, {0x51, 7}, {0x52, 11}, {0x53, 16},
+ {0x54, 16}, {0x55, 16}, {0x56, 16}, {0x57, 16}, {0x58, 16}, {0x59, 16},
+ {0x5a, 16}, {0x61, 7}, {0x62, 12}, {0x63, 16}, {0x64, 16}, {0x65, 16},
+ {0x66, 16}, {0x67, 16}, {0x68, 16}, {0x69, 16}, {0x6a, 16}, {0x71, 8},
+ {0x72, 12}, {0x73, 16}, {0x74, 16}, {0x75, 16}, {0x76, 16}, {0x77, 16},
+ {0x78, 16}, {0x79, 16}, {0x7a, 16}, {0x81, 9}, {0x82, 15}, {0x83, 16},
+ {0x84, 16}, {0x85, 16}, {0x86, 16}, {0x87, 16}, {0x88, 16}, {0x89, 16},
+ {0x8a, 16}, {0x91, 9}, {0x92, 16}, {0x93, 16}, {0x94, 16}, {0x95, 16},
+ {0x96, 16}, {0x97, 16}, {0x98, 16}, {0x99, 16}, {0x9a, 16}, {0xa1, 9},
+ {0xa2, 16}, {0xa3, 16}, {0xa4, 16}, {0xa5, 16}, {0xa6, 16}, {0xa7, 16},
+ {0xa8, 16}, {0xa9, 16}, {0xaa, 16}, {0xb1, 10}, {0xb2, 16}, {0xb3, 16},
+ {0xb4, 16}, {0xb5, 16}, {0xb6, 16}, {0xb7, 16}, {0xb8, 16}, {0xb9, 16},
+ {0xba, 16}, {0xc1, 10}, {0xc2, 16}, {0xc3, 16}, {0xc4, 16}, {0xc5, 16},
+ {0xc6, 16}, {0xc7, 16}, {0xc8, 16}, {0xc9, 16}, {0xca, 16}, {0xd1, 11},
+ {0xd2, 16}, {0xd3, 16}, {0xd4, 16}, {0xd5, 16}, {0xd6, 16}, {0xd7, 16},
+ {0xd8, 16}, {0xd9, 16}, {0xda, 16}, {0xe1, 16}, {0xe2, 16}, {0xe3, 16},
+ {0xe4, 16}, {0xe5, 16}, {0xe6, 16}, {0xe7, 16}, {0xe8, 16}, {0xe9, 16},
+ {0xea, 16}, {0xf0, 11}, {0xf1, 16}, {0xf2, 16}, {0xf3, 16}, {0xf4, 16},
+ {0xf5, 16}, {0xf6, 16}, {0xf7, 16}, {0xf8, 16}, {0xf9, 16}, {0xfa, 16}
+};
+/* *INDENT-ON* */
+
+/* Table K.6 - Table for chrominance AC coefficients */
+/* *INDENT-OFF* */
+static const GstJpegHuffmanTableEntry default_chrominance_ac_table[] = {
+ {0x00, 2}, {0x01, 2}, {0x02, 3}, {0x03, 4}, {0x04, 5}, {0x05, 5},
+ {0x06, 6}, {0x07, 7}, {0x08, 9}, {0x09, 10}, {0x0a, 12}, {0x11, 4},
+ {0x12, 6}, {0x13, 8}, {0x14, 9}, {0x15, 11}, {0x16, 12}, {0x17, 16},
+ {0x18, 16}, {0x19, 16}, {0x1a, 16}, {0x21, 5}, {0x22, 8}, {0x23, 10},
+ {0x24, 12}, {0x25, 15}, {0x26, 16}, {0x27, 16}, {0x28, 16}, {0x29, 16},
+ {0x2a, 16}, {0x31, 5}, {0x32, 8}, {0x33, 10}, {0x34, 12}, {0x35, 16},
+ {0x36, 16}, {0x37, 16}, {0x38, 16}, {0x39, 16}, {0x3a, 16}, {0x41, 6},
+ {0x42, 9}, {0x43, 16}, {0x44, 16}, {0x45, 16}, {0x46, 16}, {0x47, 16},
+ {0x48, 16}, {0x49, 16}, {0x4a, 16}, {0x51, 6}, {0x52, 10}, {0x53, 16},
+ {0x54, 16}, {0x55, 16}, {0x56, 16}, {0x57, 16}, {0x58, 16}, {0x59, 16},
+ {0x5a, 16}, {0x61, 7}, {0x62, 11}, {0x63, 16}, {0x64, 16}, {0x65, 16},
+ {0x66, 16}, {0x67, 16}, {0x68, 16}, {0x69, 16}, {0x6a, 16}, {0x71, 7},
+ {0x72, 11}, {0x73, 16}, {0x74, 16}, {0x75, 16}, {0x76, 16}, {0x77, 16},
+ {0x78, 16}, {0x79, 16}, {0x7a, 16}, {0x81, 8}, {0x82, 16}, {0x83, 16},
+ {0x84, 16}, {0x85, 16}, {0x86, 16}, {0x87, 16}, {0x88, 16}, {0x89, 16},
+ {0x8a, 16}, {0x91, 9}, {0x92, 16}, {0x93, 16}, {0x94, 16}, {0x95, 16},
+ {0x96, 16}, {0x97, 16}, {0x98, 16}, {0x99, 16}, {0x9a, 16}, {0xa1, 9},
+ {0xa2, 16}, {0xa3, 16}, {0xa4, 16}, {0xa5, 16}, {0xa6, 16}, {0xa7, 16},
+ {0xa8, 16}, {0xa9, 16}, {0xaa, 16}, {0xb1, 9}, {0xb2, 16}, {0xb3, 16},
+ {0xb4, 16}, {0xb5, 16}, {0xb6, 16}, {0xb7, 16}, {0xb8, 16}, {0xb9, 16},
+ {0xba, 16}, {0xc1, 9}, {0xc2, 16}, {0xc3, 16}, {0xc4, 16}, {0xc5, 16},
+ {0xc6, 16}, {0xc7, 16}, {0xc8, 16}, {0xc9, 16}, {0xca, 16}, {0xd1, 11},
+ {0xd2, 16}, {0xd3, 16}, {0xd4, 16}, {0xd5, 16}, {0xd6, 16}, {0xd7, 16},
+ {0xd8, 16}, {0xd9, 16}, {0xda, 16}, {0xe1, 14}, {0xe2, 16}, {0xe3, 16},
+ {0xe4, 16}, {0xe5, 16}, {0xe6, 16}, {0xe7, 16}, {0xe8, 16}, {0xe9, 16},
+ {0xea, 16}, {0xf0, 10}, {0xf1, 15}, {0xf2, 16}, {0xf3, 16}, {0xf4, 16},
+ {0xf5, 16}, {0xf6, 16}, {0xf7, 16}, {0xf8, 16}, {0xf9, 16}, {0xfa, 16}
};
/* *INDENT-ON* */
return TRUE;
}
+static int
+compare_huffman_table_entry (const void *a, const void *b)
+{
+ const GstJpegHuffmanTableEntry *const e1 = *(GstJpegHuffmanTableEntry **) a;
+ const GstJpegHuffmanTableEntry *const e2 = *(GstJpegHuffmanTableEntry **) b;
+
+ if (e1->length == e2->length)
+ return (gint) e1->value - (gint) e2->value;
+ return (gint) e1->length - (gint) e2->length;
+}
+
+static void
+build_huffman_table (GstJpegHuffmanTable * huf_table,
+ const GstJpegHuffmanTableEntry * entries, guint num_entries)
+{
+ const GstJpegHuffmanTableEntry *sorted_entries[256];
+ guint i, j, n;
+
+ g_assert (num_entries <= G_N_ELEMENTS (sorted_entries));
+
+ for (i = 0; i < num_entries; i++)
+ sorted_entries[i] = &entries[i];
+ qsort (sorted_entries, num_entries, sizeof (sorted_entries[0]),
+ compare_huffman_table_entry);
+
+ for (i = 0, j = 1, n = 0; i < num_entries; i++) {
+ const GstJpegHuffmanTableEntry *const e = sorted_entries[i];
+ if (e->length != j) {
+ huf_table->huf_bits[j++ - 1] = n;
+ for (; j < e->length; j++)
+ huf_table->huf_bits[j - 1] = 0;
+ n = 0;
+ }
+ huf_table->huf_values[i] = e->value;
+ n++;
+ }
+
+ for (; j < G_N_ELEMENTS (huf_table->huf_bits); j++)
+ huf_table->huf_bits[j] = 0;
+ for (; i < G_N_ELEMENTS (huf_table->huf_values); i++)
+ huf_table->huf_values[i] = 0;
+ huf_table->valid = TRUE;
+}
+
void
gst_jpeg_get_default_huffman_tables (GstJpegHuffmanTables * huf_tables)
{
g_assert (huf_tables);
- memcpy (huf_tables, &default_huf_tables, sizeof (*huf_tables));
+ /* Build DC tables */
+ build_huffman_table (&huf_tables->dc_tables[0], default_luminance_dc_table,
+ G_N_ELEMENTS (default_luminance_dc_table));
+ build_huffman_table (&huf_tables->dc_tables[1], default_chrominance_dc_table,
+ G_N_ELEMENTS (default_chrominance_dc_table));
+ memcpy (&huf_tables->dc_tables[2], &huf_tables->dc_tables[1],
+ sizeof (huf_tables->dc_tables[2]));
+
+ /* Build AC tables */
+ build_huffman_table (&huf_tables->ac_tables[0], default_luminance_ac_table,
+ G_N_ELEMENTS (default_luminance_ac_table));
+ build_huffman_table (&huf_tables->ac_tables[1], default_chrominance_ac_table,
+ G_N_ELEMENTS (default_chrominance_ac_table));
+ memcpy (&huf_tables->ac_tables[2], &huf_tables->ac_tables[1],
+ sizeof (huf_tables->ac_tables[2]));
}
void