+++ /dev/null
-/*
- * gstjpegparser.c - JPEG parser
- *
- * Copyright (C) 2011-2012 Intel Corporation
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 2.1
- * of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301 USA
- */
-
-#include <string.h>
-#include <stdlib.h>
-#include <gst/base/gstbytereader.h>
-#include "gstjpegparser.h"
-
-#ifndef GST_DISABLE_GST_DEBUG
-
-#define GST_CAT_DEFAULT ensure_debug_category()
-
-static GstDebugCategory *
-ensure_debug_category (void)
-{
- static gsize cat_gonce = 0;
-
- if (g_once_init_enter (&cat_gonce)) {
- gsize cat_done;
-
- cat_done = (gsize) _gst_debug_category_new ("codecparsers_jpeg", 0,
- "GstJpegCodecParser");
-
- g_once_init_leave (&cat_gonce, cat_done);
- }
-
- return (GstDebugCategory *) cat_gonce;
-}
-#else
-
-#define ensure_debug_category() /* NOOP */
-
-#endif /* GST_DISABLE_GST_DEBUG */
-
-#define DEBUG_PRINT_COMMENT 0
-
-#define READ_UINT8(reader, val) G_STMT_START { \
- if (!gst_byte_reader_get_uint8 ((reader), &(val))) { \
- GST_WARNING ("failed to read uint8"); \
- goto failed; \
- } \
- } G_STMT_END
-
-#define READ_UINT16(reader, val) G_STMT_START { \
- if (!gst_byte_reader_get_uint16_be ((reader), &(val))) { \
- GST_WARNING ("failed to read uint16"); \
- goto failed; \
- } \
- } G_STMT_END
-
-#define READ_BYTES(reader, buf, length) G_STMT_START { \
- const guint8 *vals; \
- if (!gst_byte_reader_get_data (reader, length, &vals)) { \
- GST_WARNING ("failed to read bytes, size:%d", length); \
- goto failed; \
- } \
- memcpy (buf, vals, length); \
- } G_STMT_END
-
-#define U_READ_UINT8(reader, val) G_STMT_START { \
- (val) = gst_byte_reader_get_uint8_unchecked(reader); \
- } G_STMT_END
-
-#define U_READ_UINT16(reader, val) G_STMT_START { \
- (val) = gst_byte_reader_get_uint16_be_unchecked(reader); \
- } G_STMT_END
-
-
-/* Table used to address an 8x8 matrix in zig-zag order */
-/* *INDENT-OFF* */
-static const guint8 zigzag_index[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
-};
-/* *INDENT-ON* */
-
-/* Table K.1 - Luminance quantization table */
-/* *INDENT-OFF* */
-static const guint8 default_luminance_quant_table[64] = {
- 16, 11, 10, 16, 24, 40, 51, 61,
- 12, 12, 14, 19, 26, 58, 60, 55,
- 14, 13, 16, 24, 40, 57, 69, 56,
- 14, 17, 22, 29, 51, 87, 80, 62,
- 18, 22, 37, 56, 68, 109, 103, 77,
- 24, 35, 55, 64, 81, 104, 113, 92,
- 49, 64, 78, 87, 103, 121, 120, 101,
- 72, 92, 95, 98, 112, 100, 103, 99
-};
-/* *INDENT-ON* */
-
-/* Table K.2 - Chrominance quantization table */
-/* *INDENT-OFF* */
-static const guint8 default_chrominance_quant_table[64] = {
- 17, 18, 24, 47, 99, 99, 99, 99,
- 18, 21, 26, 66, 99, 99, 99, 99,
- 24, 26, 56, 99, 99, 99, 99, 99,
- 47, 66, 99, 99, 99, 99, 99, 99,
- 99, 99, 99, 99, 99, 99, 99, 99,
- 99, 99, 99, 99, 99, 99, 99, 99,
- 99, 99, 99, 99, 99, 99, 99, 99,
- 99, 99, 99, 99, 99, 99, 99, 99
-};
-/* *INDENT-ON* */
-
-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 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* */
-
-static inline gboolean
-jpeg_parse_to_next_marker (GstByteReader * br, guint8 * marker)
-{
- gint ofs;
-
- ofs = gst_jpeg_scan_for_marker_code (br->data, br->size, br->byte);
- if (ofs < 0)
- return FALSE;
-
- if (marker)
- *marker = br->data[ofs + 1];
- gst_byte_reader_skip (br, ofs - br->byte + 2);
- return TRUE;
-}
-
-gint
-gst_jpeg_scan_for_marker_code (const guint8 * data, gsize size, guint offset)
-{
- guint i;
-
- g_return_val_if_fail (data != NULL, -1);
- g_return_val_if_fail (size > offset, -1);
-
- for (i = offset; i < size - 1;) {
- if (data[i] != 0xff)
- i++;
- else {
- const guint8 v = data[i + 1];
- if (v >= 0xc0 && v <= 0xfe)
- return i;
- i += 2;
- }
- }
- return -1;
-}
-
-gboolean
-gst_jpeg_parse_frame_hdr (GstJpegFrameHdr * frame_hdr,
- const guint8 * data, gsize size, guint offset)
-{
- GstByteReader br;
- guint16 length;
- guint8 val;
- guint i;
-
- g_return_val_if_fail (frame_hdr != NULL, FALSE);
- g_return_val_if_fail (data != NULL, FALSE);
- g_return_val_if_fail (size > offset, FALSE);
-
- size -= offset;
- gst_byte_reader_init (&br, &data[offset], size);
- g_return_val_if_fail (size >= 8, FALSE);
-
- U_READ_UINT16 (&br, length); /* Lf */
- g_return_val_if_fail (size >= length, FALSE);
-
- U_READ_UINT8 (&br, frame_hdr->sample_precision);
- U_READ_UINT16 (&br, frame_hdr->height);
- U_READ_UINT16 (&br, frame_hdr->width);
- U_READ_UINT8 (&br, frame_hdr->num_components);
- g_return_val_if_fail (frame_hdr->num_components <=
- GST_JPEG_MAX_SCAN_COMPONENTS, FALSE);
-
- length -= 8;
- g_return_val_if_fail (length >= 3 * frame_hdr->num_components, FALSE);
- for (i = 0; i < frame_hdr->num_components; i++) {
- U_READ_UINT8 (&br, frame_hdr->components[i].identifier);
- U_READ_UINT8 (&br, val);
- frame_hdr->components[i].horizontal_factor = (val >> 4) & 0x0F;
- frame_hdr->components[i].vertical_factor = (val & 0x0F);
- U_READ_UINT8 (&br, frame_hdr->components[i].quant_table_selector);
- g_return_val_if_fail ((frame_hdr->components[i].horizontal_factor <= 4 &&
- frame_hdr->components[i].vertical_factor <= 4 &&
- frame_hdr->components[i].quant_table_selector < 4), FALSE);
- length -= 3;
- }
-
- g_assert (length == 0);
- return TRUE;
-}
-
-gboolean
-gst_jpeg_parse_scan_hdr (GstJpegScanHdr * scan_hdr,
- const guint8 * data, gsize size, guint offset)
-{
- GstByteReader br;
- guint16 length;
- guint8 val;
- guint i;
-
- g_return_val_if_fail (scan_hdr != NULL, FALSE);
- g_return_val_if_fail (data != NULL, FALSE);
- g_return_val_if_fail (size > offset, FALSE);
-
- size -= offset;
- gst_byte_reader_init (&br, &data[offset], size);
- g_return_val_if_fail (size >= 3, FALSE);
-
- U_READ_UINT16 (&br, length); /* Ls */
- g_return_val_if_fail (size >= length, FALSE);
-
- U_READ_UINT8 (&br, scan_hdr->num_components);
- g_return_val_if_fail (scan_hdr->num_components <=
- GST_JPEG_MAX_SCAN_COMPONENTS, FALSE);
-
- length -= 3;
- g_return_val_if_fail (length >= 2 * scan_hdr->num_components, FALSE);
- for (i = 0; i < scan_hdr->num_components; i++) {
- U_READ_UINT8 (&br, scan_hdr->components[i].component_selector);
- U_READ_UINT8 (&br, val);
- scan_hdr->components[i].dc_selector = (val >> 4) & 0x0F;
- scan_hdr->components[i].ac_selector = val & 0x0F;
- g_return_val_if_fail ((scan_hdr->components[i].dc_selector < 4 &&
- scan_hdr->components[i].ac_selector < 4), FALSE);
- length -= 2;
- }
-
- /* FIXME: Ss, Se, Ah, Al */
- g_assert (length == 3);
- return TRUE;
-}
-
-gboolean
-gst_jpeg_parse_huffman_table (GstJpegHuffmanTables * huf_tables,
- const guint8 * data, gsize size, guint offset)
-{
- GstByteReader br;
- GstJpegHuffmanTable *huf_table;
- guint16 length;
- guint8 val, table_class, table_index;
- guint32 value_count;
- guint i;
-
- g_return_val_if_fail (huf_tables != NULL, FALSE);
- g_return_val_if_fail (data != NULL, FALSE);
- g_return_val_if_fail (size > offset, FALSE);
-
- size -= offset;
- gst_byte_reader_init (&br, &data[offset], size);
- g_return_val_if_fail (size >= 2, FALSE);
-
- U_READ_UINT16 (&br, length); /* Lh */
- g_return_val_if_fail (size >= length, FALSE);
-
- while (gst_byte_reader_get_remaining (&br)) {
- U_READ_UINT8 (&br, val);
- table_class = ((val >> 4) & 0x0F);
- table_index = (val & 0x0F);
- g_return_val_if_fail (table_index < GST_JPEG_MAX_SCAN_COMPONENTS, FALSE);
- if (table_class == 0) {
- huf_table = &huf_tables->dc_tables[table_index];
- } else {
- huf_table = &huf_tables->ac_tables[table_index];
- }
- READ_BYTES (&br, huf_table->huf_bits, 16);
- value_count = 0;
- for (i = 0; i < 16; i++)
- value_count += huf_table->huf_bits[i];
- READ_BYTES (&br, huf_table->huf_values, value_count);
- huf_table->valid = TRUE;
- }
- return TRUE;
-
-failed:
- return FALSE;
-}
-
-gboolean
-gst_jpeg_parse_quant_table (GstJpegQuantTables * quant_tables,
- const guint8 * data, gsize size, guint offset)
-{
- GstByteReader br;
- GstJpegQuantTable *quant_table;
- guint16 length;
- guint8 val, table_index;
- guint i;
-
- g_return_val_if_fail (quant_tables != NULL, FALSE);
- g_return_val_if_fail (data != NULL, FALSE);
- g_return_val_if_fail (size > offset, FALSE);
-
- size -= offset;
- gst_byte_reader_init (&br, &data[offset], size);
- g_return_val_if_fail (size >= 2, FALSE);
-
- U_READ_UINT16 (&br, length); /* Lq */
- g_return_val_if_fail (size >= length, FALSE);
-
- while (gst_byte_reader_get_remaining (&br)) {
- U_READ_UINT8 (&br, val);
- table_index = (val & 0x0f);
- g_return_val_if_fail (table_index < GST_JPEG_MAX_SCAN_COMPONENTS, FALSE);
- quant_table = &quant_tables->quant_tables[table_index];
- quant_table->quant_precision = ((val >> 4) & 0x0f);
-
- g_return_val_if_fail (gst_byte_reader_get_remaining (&br) >=
- GST_JPEG_MAX_QUANT_ELEMENTS * (1 + ! !quant_table->quant_precision),
- FALSE);
- for (i = 0; i < GST_JPEG_MAX_QUANT_ELEMENTS; i++) {
- if (!quant_table->quant_precision) { /* 8-bit values */
- U_READ_UINT8 (&br, val);
- quant_table->quant_table[i] = val;
- } else { /* 16-bit values */
- U_READ_UINT16 (&br, quant_table->quant_table[i]);
- }
- }
- quant_table->valid = TRUE;
- }
- return TRUE;
-}
-
-gboolean
-gst_jpeg_parse_restart_interval (guint * interval,
- const guint8 * data, gsize size, guint offset)
-{
- GstByteReader br;
- guint16 length, val;
-
- g_return_val_if_fail (interval != NULL, FALSE);
- g_return_val_if_fail (data != NULL, FALSE);
- g_return_val_if_fail (size > offset, FALSE);
-
- size -= offset;
- gst_byte_reader_init (&br, &data[offset], size);
- g_return_val_if_fail (size >= 4, FALSE);
-
- U_READ_UINT16 (&br, length); /* Lr */
- g_return_val_if_fail (size >= length, FALSE);
-
- U_READ_UINT16 (&br, val);
- *interval = val;
- 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);
-
- /* 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]));
-}
-
-static void
-build_quant_table (GstJpegQuantTable * quant_table, const guint8 values[64])
-{
- guint i;
-
- for (i = 0; i < 64; i++)
- quant_table->quant_table[i] = values[zigzag_index[i]];
- quant_table->quant_precision = 0; /* Pq = 0 (8-bit precision) */
- quant_table->valid = TRUE;
-}
-
-void
-gst_jpeg_get_default_quantization_tables (GstJpegQuantTables * quant_tables)
-{
- g_assert (quant_tables);
-
- build_quant_table (&quant_tables->quant_tables[0],
- default_luminance_quant_table);
- build_quant_table (&quant_tables->quant_tables[1],
- default_chrominance_quant_table);
- build_quant_table (&quant_tables->quant_tables[2],
- default_chrominance_quant_table);
-}
-
-gboolean
-gst_jpeg_parse (GstJpegMarkerSegment * seg,
- const guint8 * data, gsize size, guint offset)
-{
- GstByteReader br;
- guint16 length;
-
- g_return_val_if_fail (seg != NULL, FALSE);
-
- if (size <= offset) {
- GST_DEBUG ("failed to parse from offset %u, buffer is too small", offset);
- return FALSE;
- }
-
- size -= offset;
- gst_byte_reader_init (&br, &data[offset], size);
-
- if (!jpeg_parse_to_next_marker (&br, &seg->marker)) {
- GST_DEBUG ("failed to find marker code");
- return FALSE;
- }
-
- seg->offset = offset + gst_byte_reader_get_pos (&br);
- seg->size = -1;
-
- /* Try to find end of segment */
- switch (seg->marker) {
- case GST_JPEG_MARKER_SOI:
- case GST_JPEG_MARKER_EOI:
- fixed_size_segment:
- seg->size = 2;
- break;
-
- case (GST_JPEG_MARKER_SOF_MIN + 0): /* Lf */
- case (GST_JPEG_MARKER_SOF_MIN + 1): /* Lf */
- case (GST_JPEG_MARKER_SOF_MIN + 2): /* Lf */
- case (GST_JPEG_MARKER_SOF_MIN + 3): /* Lf */
- case (GST_JPEG_MARKER_SOF_MIN + 9): /* Lf */
- case (GST_JPEG_MARKER_SOF_MIN + 10): /* Lf */
- case (GST_JPEG_MARKER_SOF_MIN + 11): /* Lf */
- case GST_JPEG_MARKER_SOS: /* Ls */
- case GST_JPEG_MARKER_DQT: /* Lq */
- case GST_JPEG_MARKER_DHT: /* Lh */
- case GST_JPEG_MARKER_DAC: /* La */
- case GST_JPEG_MARKER_DRI: /* Lr */
- case GST_JPEG_MARKER_COM: /* Lc */
- case GST_JPEG_MARKER_DNL: /* Ld */
- variable_size_segment:
- READ_UINT16 (&br, length);
- seg->size = length;
- break;
-
- default:
- /* Application data segment length (Lp) */
- if (seg->marker >= GST_JPEG_MARKER_APP_MIN &&
- seg->marker <= GST_JPEG_MARKER_APP_MAX)
- goto variable_size_segment;
-
- /* Restart markers (fixed size, two bytes only) */
- if (seg->marker >= GST_JPEG_MARKER_RST_MIN &&
- seg->marker <= GST_JPEG_MARKER_RST_MAX)
- goto fixed_size_segment;
-
- /* Fallback: scan for next marker */
- if (!jpeg_parse_to_next_marker (&br, NULL))
- goto failed;
- seg->size = gst_byte_reader_get_pos (&br) - seg->offset;
- break;
- }
- return TRUE;
-
-failed:
- return FALSE;
-}
+++ /dev/null
-/*
- * gstjpegparser.h - JPEG parser
- *
- * Copyright (C) 2011-2012 Intel Corporation
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 2.1
- * of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301 USA
- */
-
-#ifndef GST_JPEG_PARSER_H
-#define GST_JPEG_PARSER_H
-
-#ifndef GST_USE_UNSTABLE_API
-# warning "The JPEG parsing library is unstable API and may change in future."
-# warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
-#endif
-
-#include <gst/gst.h>
-
-G_BEGIN_DECLS
-
-/**
- * GST_JPEG_MAX_FRAME_COMPONENTS:
- *
- * Maximum number of image components in a frame (Nf).
- */
-#define GST_JPEG_MAX_FRAME_COMPONENTS 256
-
-/**
- * GST_JPEG_MAX_SCAN_COMPONENTS:
- *
- * Maximum number of image components in a scan (Ns).
- */
-#define GST_JPEG_MAX_SCAN_COMPONENTS 4
-
-/**
- * GST_JPEG_MAX_QUANT_ELEMENTS:
- *
- * Number of elements in the quantization table.
- */
-#define GST_JPEG_MAX_QUANT_ELEMENTS 64
-
-typedef struct _GstJpegQuantTable GstJpegQuantTable;
-typedef struct _GstJpegQuantTables GstJpegQuantTables;
-typedef struct _GstJpegHuffmanTable GstJpegHuffmanTable;
-typedef struct _GstJpegHuffmanTables GstJpegHuffmanTables;
-typedef struct _GstJpegScanComponent GstJpegScanComponent;
-typedef struct _GstJpegScanHdr GstJpegScanHdr;
-typedef struct _GstJpegFrameComponent GstJpegFrameComponent;
-typedef struct _GstJpegFrameHdr GstJpegFrameHdr;
-typedef struct _GstJpegMarkerSegment GstJpegMarkerSegment;
-
-/**
- * GstJpegMarkerCode:
- * @GST_JPEG_MARKER_SOF_MIN: Start of frame min marker code
- * @GST_JPEG_MARKER_SOF_MAX: Start of frame max marker code
- * @GST_JPEG_MARKER_DHT: Huffman tabler marker code
- * @GST_JPEG_MARKER_DAC: Arithmetic coding marker code
- * @GST_JPEG_MARKER_RST_MIN: Restart interval min marker code
- * @GST_JPEG_MARKER_RST_MAX: Restart interval max marker code
- * @GST_JPEG_MARKER_SOI: Start of image marker code
- * @GST_JPEG_MARKER_EOI: End of image marker code
- * @GST_JPEG_MARKER_SOS: Start of scan marker code
- * @GST_JPEG_MARKER_DQT: Define quantization table marker code
- * @GST_JPEG_MARKER_DNL: Define number of lines marker code
- * @GST_JPEG_MARKER_DRI: Define restart interval marker code
- * @GST_JPEG_MARKER_APP_MIN: Application segment min marker code
- * @GST_JPEG_MARKER_APP_MAX: Application segment max marker code
- * @GST_JPEG_MARKER_COM: Comment marker code
- *
- * Indicates the type of JPEG segment.
- */
-typedef enum {
- GST_JPEG_MARKER_SOF_MIN = 0xC0,
- GST_JPEG_MARKER_SOF_MAX = 0xCF,
- GST_JPEG_MARKER_DHT = 0xC4,
- GST_JPEG_MARKER_DAC = 0xCC,
- GST_JPEG_MARKER_RST_MIN = 0xD0,
- GST_JPEG_MARKER_RST_MAX = 0xD7,
- GST_JPEG_MARKER_SOI = 0xD8,
- GST_JPEG_MARKER_EOI = 0xD9,
- GST_JPEG_MARKER_SOS = 0xDA,
- GST_JPEG_MARKER_DQT = 0xDB,
- GST_JPEG_MARKER_DNL = 0xDC,
- GST_JPEG_MARKER_DRI = 0xDD,
- GST_JPEG_MARKER_APP_MIN = 0xE0,
- GST_JPEG_MARKER_APP_MAX = 0xEF,
- GST_JPEG_MARKER_COM = 0xFE,
-} GstJpegMarkerCode;
-
-/**
- * GstJpegProfile:
- * @GST_JPEG_PROFILE_BASELINE: Baseline DCT
- * @GST_JPEG_PROFILE_EXTENDED: Extended sequential DCT
- * @GST_JPEG_PROFILE_PROGRESSIVE: Progressive DCT
- * @GST_JPEG_PROFILE_LOSSLESS: Lossless (sequential)
- *
- * JPEG encoding processes.
- */
-typedef enum {
- GST_JPEG_PROFILE_BASELINE = 0x00,
- GST_JPEG_PROFILE_EXTENDED = 0x01,
- GST_JPEG_PROFILE_PROGRESSIVE = 0x02,
- GST_JPEG_PROFILE_LOSSLESS = 0x03,
-} GstJpegProfile;
-
-/**
- * GstJpegEntropyCodingMode:
- * @GST_JPEG_ENTROPY_CODING_HUFFMAN: Huffman coding
- * @GST_JPEG_ENTROPY_CODING_ARITHMETIC: arithmetic coding
- *
- * JPEG entropy coding mode.
- */
-typedef enum {
- GST_JPEG_ENTROPY_CODING_HUFFMAN = 0x00,
- GST_JPEG_ENTROPY_CODING_ARITHMETIC = 0x08
-} GstJpegEntropyCodingMode;
-
-/**
- * GstJpegQuantTable:
- * @quant_precision: Quantization table element precision (Pq)
- * @quant_table: Quantization table elements (Qk)
- * @valid: If the quantization table is valid, which means it has
- * already been parsed
- *
- * Quantization table.
- */
-struct _GstJpegQuantTable
-{
- guint8 quant_precision;
- guint16 quant_table[GST_JPEG_MAX_QUANT_ELEMENTS];
- gboolean valid;
-};
-
-/**
- * GstJpegQuantTables:
- * @quant_tables: All quantization tables
- *
- * Helper data structure that holds all quantization tables used to
- * decode an image.
- */
-struct _GstJpegQuantTables
-{
- GstJpegQuantTable quant_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
-};
-
-/**
- * GstJpegHuffmanTable:
- * @huf_bits: Number of Huffman codes of length i + 1 (Li)
- * @huf_vales: Value associated with each Huffman code (Vij)
- * @valid: If the Huffman table is valid, which means it has already
- * been parsed
- *
- * Huffman table.
- */
-struct _GstJpegHuffmanTable
-{
- guint8 huf_bits[16];
- guint8 huf_values[256];
- gboolean valid;
-};
-
-/**
- * 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)
- * @dc_selector: DC entropy coding table destination selector (Tdj)
- * @ac_selector: AC entropy coding table destination selector (Taj)
-
- * Component-specification parameters.
- */
-struct _GstJpegScanComponent
-{
- guint8 component_selector; /* 0 .. 255 */
- guint8 dc_selector; /* 0 .. 3 */
- guint8 ac_selector; /* 0 .. 3 */
-};
-
-/**
- * GstJpegScanHdr:
- * @num_components: Number of image components in scan (Ns)
- * @components: Image components
- *
- * Scan header.
- */
-struct _GstJpegScanHdr
-{
- guint8 num_components; /* 1 .. 4 */
- GstJpegScanComponent components[GST_JPEG_MAX_SCAN_COMPONENTS];
-};
-
-/**
- * GstJpegFrameComponent:
- * @identifier: Component identifier (Ci)
- * @horizontal_factor: Horizontal sampling factor (Hi)
- * @vertical_factor: Vertical sampling factor (Vi)
- * @quant_table_selector: Quantization table destination selector (Tqi)
- *
- * Component-specification parameters.
- */
-struct _GstJpegFrameComponent
-{
- guint8 identifier; /* 0 .. 255 */
- guint8 horizontal_factor; /* 1 .. 4 */
- guint8 vertical_factor; /* 1 .. 4 */
- guint8 quant_table_selector; /* 0 .. 3 */
-};
-
-/**
- * GstJpegFrameHdr:
- * @sample_precision: Sample precision (P)
- * @height: Number of lines (Y)
- * @width: Number of samples per line (X)
- * @num_components: Number of image components in frame (Nf)
- * @components: Image components
- * @restart_interval: Number of MCU in the restart interval (Ri)
- *
- * Frame header.
- */
-struct _GstJpegFrameHdr
-{
- guint8 sample_precision; /* 2 .. 16 */
- guint16 width; /* 1 .. 65535 */
- guint16 height; /* 0 .. 65535 */
- guint8 num_components; /* 1 .. 255 */
- GstJpegFrameComponent components[GST_JPEG_MAX_FRAME_COMPONENTS];
-};
-
-/**
- * GstJpegMarkerSegment:
- * @type: The type of the segment that starts at @offset
- * @offset: The offset to the segment start in bytes. This is the
- * exact start of the segment, no marker code included
- * @size: The size in bytes of the segment, or -1 if the end was not
- * found. It is the exact size of the segment, no marker code included
- *
- * A structure that contains the type of a segment, its offset and its size.
- */
-struct _GstJpegMarkerSegment
-{
- guint8 marker;
- guint offset;
- gint size;
-};
-
-/**
- * gst_jpeg_scan_for_marker_code:
- * @data: The data to parse
- * @size: The size of @data
- * @offset: The offset from which to start parsing
- *
- * Scans the JPEG bitstream contained in @data for the next marker
- * code. If found, the function returns an offset to the marker code,
- * including the 0xff prefix code but excluding any extra fill bytes.
- *
- * Returns: offset to the marker code if found, or -1 if not found.
- */
-gint gst_jpeg_scan_for_marker_code (const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_parse:
- * @data: The data to parse
- * @size: The size of @data
- * @offset: The offset from which to start parsing
- *
- * Parses the JPEG bitstream contained in @data, and returns the
- * detected segment as a #GstJpegMarkerSegment.
- *
- * Returns: TRUE if a packet start code was found.
- */
-gboolean gst_jpeg_parse (GstJpegMarkerSegment * seg,
- const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_parse_frame_hdr:
- * @hdr: (out): The #GstJpegFrameHdr structure to fill in
- * @data: The data from which to parse the frame header
- * @size: The size of @data
- * @offset: The offset in bytes from which to start parsing @data
- *
- * Parses the @hdr JPEG frame header structure members from @data.
- *
- * Returns: TRUE if the frame header was correctly parsed.
- */
-gboolean gst_jpeg_parse_frame_hdr (GstJpegFrameHdr * hdr,
- const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_parse_scan_hdr:
- * @hdr: (out): The #GstJpegScanHdr structure to fill in
- * @data: The data from which to parse the scan header
- * @size: The size of @data
- * @offset: The offset in bytes from which to start parsing @data
- *
- * Parses the @hdr JPEG scan header structure members from @data.
- *
- * Returns: TRUE if the scan header was correctly parsed
- */
-gboolean gst_jpeg_parse_scan_hdr (GstJpegScanHdr * hdr,
- const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_parse_quantization_table:
- * @quant_tables: (out): The #GstJpegQuantizationTable structure to fill in
- * @num_quant_tables: The number of allocated quantization tables in @quant_tables
- * @data: The data from which to parse the quantization table
- * @size: The size of @data
- * @offset: The offset in bytes from which to start parsing @data
- *
- * Parses the JPEG quantization table structure members from @data.
- *
- * Note: @quant_tables represents the complete set of possible
- * quantization tables. However, the parser will only write to the
- * quantization table specified by the table destination identifier
- * (Tq). While doing so, the @valid flag of the specified quantization
- * table will also be set to %TRUE.
- *
- * Returns: TRUE if the quantization table was correctly parsed.
- */
-gboolean gst_jpeg_parse_quant_table (GstJpegQuantTables *quant_tables,
- const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_parse_huffman_table:
- * @huf_tables: (out): The #GstJpegHuffmanTable structure to fill in
- * @data: The data from which to parse the Huffman table
- * @size: The size of @data
- * @offset: The offset in bytes from which to start parsing @data
- *
- * Parses the JPEG Huffman table structure members from @data.
- *
- * 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). While doing so,
- * the @valid flag of the specified Huffman table will also be set to
- * %TRUE;
- *
- * Returns: TRUE if the Huffman table was correctly parsed.
- */
-gboolean gst_jpeg_parse_huffman_table (GstJpegHuffmanTables *huf_tables,
- const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_parse_restart_interval:
- * @interval: (out): The parsed restart interval value
- * @data: The data from which to parse the restart interval specification
- * @size: The size of @data
- * @offset: The offset in bytes from which to start parsing @data
- *
- * Returns: TRUE if the restart interval value was correctly parsed.
- */
-gboolean gst_jpeg_parse_restart_interval (guint * interval,
- const guint8 * data,
- gsize size,
- guint offset);
-
-/**
- * gst_jpeg_get_default_huffman_tables:
- * @huf_tables: (out): The default DC/AC Huffman tables to fill in
- *
- * Fills in @huf_tables with the default AC/DC Huffman tables, as
- * specified by the JPEG standard.
- */
-void gst_jpeg_get_default_huffman_tables (GstJpegHuffmanTables *huf_tables);
-
-/**
- * gst_jpeg_get_default_quantization_table:
- * @quant_tables: (out): The default luma/chroma quant-tables in zigzag mode
- *
- * Fills in @quant_tables with the default quantization tables, as
- * specified by the JPEG standard.
- */
-void gst_jpeg_get_default_quantization_tables (GstJpegQuantTables *quant_tables);
-
-G_END_DECLS
-
-#endif /* GST_JPEG_PARSER_H */
projects / platform / upstream / gstreamer-vaapi.git / commitdiff