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- // Copyright 2015 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "media/parsers/jpeg_parser.h"
- #include <cstring>
- #include "base/big_endian.h"
- #include "base/check_op.h"
- #include "base/logging.h"
- using base::BigEndianReader;
- #define READ_U8_OR_RETURN_FALSE(out) \
- do { \
- uint8_t _out; \
- if (!reader.ReadU8(&_out)) { \
- DVLOG(1) \
- << "Error in stream: unexpected EOS while trying to read " #out; \
- return false; \
- } \
- *(out) = _out; \
- } while (0)
- #define READ_U16_OR_RETURN_FALSE(out) \
- do { \
- uint16_t _out; \
- if (!reader.ReadU16(&_out)) { \
- DVLOG(1) \
- << "Error in stream: unexpected EOS while trying to read " #out; \
- return false; \
- } \
- *(out) = _out; \
- } while (0)
- namespace media {
- const JpegHuffmanTable kDefaultDcTable[kJpegMaxHuffmanTableNumBaseline] = {
- // luminance DC coefficients
- {
- true,
- {0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0},
- {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
- 0x0b},
- },
- // chrominance DC coefficients
- {
- true,
- {0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0},
- {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb},
- },
- };
- const JpegHuffmanTable kDefaultAcTable[kJpegMaxHuffmanTableNumBaseline] = {
- // luminance AC coefficients
- {
- true,
- {0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 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},
- },
- // chrominance AC coefficients
- {
- true,
- {0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 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},
- },
- };
- constexpr uint8_t kZigZag8x8[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};
- constexpr JpegQuantizationTable kDefaultQuantTable[2] = {
- // Table K.1 Luminance quantization table values.
- {
- true,
- {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},
- },
- // Table K.2 Chrominance quantization table values.
- {
- true,
- {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},
- },
- };
- static bool InRange(int value, int a, int b) {
- return a <= value && value <= b;
- }
- // Round up |value| to multiple of |mul|. |value| must be non-negative.
- // |mul| must be positive.
- static int RoundUp(int value, int mul) {
- DCHECK_GE(value, 0);
- DCHECK_GE(mul, 1);
- return (value + mul - 1) / mul * mul;
- }
- // |frame_header| is already initialized to 0 in ParseJpegPicture.
- static bool ParseSOF(const uint8_t* buffer,
- size_t length,
- JpegFrameHeader* frame_header) {
- // Spec B.2.2 Frame header syntax
- DCHECK(buffer);
- DCHECK(frame_header);
- BigEndianReader reader(buffer, length);
- uint8_t precision;
- READ_U8_OR_RETURN_FALSE(&precision);
- READ_U16_OR_RETURN_FALSE(&frame_header->visible_height);
- READ_U16_OR_RETURN_FALSE(&frame_header->visible_width);
- READ_U8_OR_RETURN_FALSE(&frame_header->num_components);
- if (precision != 8) {
- DLOG(ERROR) << "Only support 8-bit precision, not "
- << static_cast<int>(precision) << " bit for baseline";
- return false;
- }
- if (!InRange(frame_header->num_components, 1,
- std::size(frame_header->components))) {
- DLOG(ERROR) << "num_components="
- << static_cast<int>(frame_header->num_components)
- << " is not supported";
- return false;
- }
- int max_h_factor = 0;
- int max_v_factor = 0;
- for (size_t i = 0; i < frame_header->num_components; i++) {
- JpegComponent& component = frame_header->components[i];
- READ_U8_OR_RETURN_FALSE(&component.id);
- if (component.id > frame_header->num_components) {
- DLOG(ERROR) << "component id (" << static_cast<int>(component.id)
- << ") should be <= num_components ("
- << static_cast<int>(frame_header->num_components) << ")";
- return false;
- }
- uint8_t hv;
- READ_U8_OR_RETURN_FALSE(&hv);
- component.horizontal_sampling_factor = hv / 16;
- component.vertical_sampling_factor = hv % 16;
- if (component.horizontal_sampling_factor > max_h_factor)
- max_h_factor = component.horizontal_sampling_factor;
- if (component.vertical_sampling_factor > max_v_factor)
- max_v_factor = component.vertical_sampling_factor;
- if (!InRange(component.horizontal_sampling_factor, 1, 4)) {
- DVLOG(1) << "Invalid horizontal sampling factor "
- << static_cast<int>(component.horizontal_sampling_factor);
- return false;
- }
- if (!InRange(component.vertical_sampling_factor, 1, 4)) {
- DVLOG(1) << "Invalid vertical sampling factor "
- << static_cast<int>(component.horizontal_sampling_factor);
- return false;
- }
- READ_U8_OR_RETURN_FALSE(&component.quantization_table_selector);
- }
- // The size of data unit is 8*8 and the coded size should be extended
- // to complete minimum coded unit, MCU. See Spec A.2.
- frame_header->coded_width =
- RoundUp(frame_header->visible_width, max_h_factor * 8);
- frame_header->coded_height =
- RoundUp(frame_header->visible_height, max_v_factor * 8);
- return true;
- }
- // |q_table| is already initialized to 0 in ParseJpegPicture.
- static bool ParseDQT(const uint8_t* buffer,
- size_t length,
- JpegQuantizationTable* q_table) {
- // Spec B.2.4.1 Quantization table-specification syntax
- DCHECK(buffer);
- DCHECK(q_table);
- BigEndianReader reader(buffer, length);
- while (reader.remaining() > 0) {
- uint8_t precision_and_table_id;
- READ_U8_OR_RETURN_FALSE(&precision_and_table_id);
- uint8_t precision = precision_and_table_id / 16;
- uint8_t table_id = precision_and_table_id % 16;
- if (!InRange(precision, 0, 1)) {
- DVLOG(1) << "Invalid precision " << static_cast<int>(precision);
- return false;
- }
- if (precision == 1) { // 1 means 16-bit precision
- DLOG(ERROR) << "An 8-bit DCT-based process shall not use a 16-bit "
- << "precision quantization table";
- return false;
- }
- if (table_id >= kJpegMaxQuantizationTableNum) {
- DLOG(ERROR) << "Quantization table id (" << static_cast<int>(table_id)
- << ") exceeded " << kJpegMaxQuantizationTableNum;
- return false;
- }
- if (!reader.ReadBytes(&q_table[table_id].value,
- sizeof(q_table[table_id].value)))
- return false;
- q_table[table_id].valid = true;
- }
- return true;
- }
- // |dc_table| and |ac_table| are already initialized to 0 in ParseJpegPicture.
- static bool ParseDHT(const uint8_t* buffer,
- size_t length,
- JpegHuffmanTable* dc_table,
- JpegHuffmanTable* ac_table) {
- // Spec B.2.4.2 Huffman table-specification syntax
- DCHECK(buffer);
- DCHECK(dc_table);
- DCHECK(ac_table);
- BigEndianReader reader(buffer, length);
- while (reader.remaining() > 0) {
- uint8_t table_class_and_id;
- READ_U8_OR_RETURN_FALSE(&table_class_and_id);
- int table_class = table_class_and_id / 16;
- int table_id = table_class_and_id % 16;
- if (!InRange(table_class, 0, 1)) {
- DVLOG(1) << "Invalid table class " << table_class;
- return false;
- }
- if (table_id >= 2) {
- DLOG(ERROR) << "Table id(" << table_id
- << ") >= 2 is invalid for baseline profile";
- return false;
- }
- JpegHuffmanTable* table;
- if (table_class == 1)
- table = &ac_table[table_id];
- else
- table = &dc_table[table_id];
- size_t count = 0;
- if (!reader.ReadBytes(&table->code_length, sizeof(table->code_length)))
- return false;
- for (size_t i = 0; i < std::size(table->code_length); i++)
- count += table->code_length[i];
- if (!InRange(count, 0, sizeof(table->code_value))) {
- DVLOG(1) << "Invalid code count " << count;
- return false;
- }
- if (!reader.ReadBytes(&table->code_value, count))
- return false;
- table->valid = true;
- }
- return true;
- }
- static bool ParseDRI(const uint8_t* buffer,
- size_t length,
- uint16_t* restart_interval) {
- // Spec B.2.4.4 Restart interval definition syntax
- DCHECK(buffer);
- DCHECK(restart_interval);
- BigEndianReader reader(buffer, length);
- return reader.ReadU16(restart_interval) && reader.remaining() == 0;
- }
- // |scan| is already initialized to 0 in ParseJpegPicture.
- static bool ParseSOS(const uint8_t* buffer,
- size_t length,
- const JpegFrameHeader& frame_header,
- JpegScanHeader* scan) {
- // Spec B.2.3 Scan header syntax
- DCHECK(buffer);
- DCHECK(scan);
- BigEndianReader reader(buffer, length);
- READ_U8_OR_RETURN_FALSE(&scan->num_components);
- if (scan->num_components != frame_header.num_components) {
- DLOG(ERROR) << "The number of scan components ("
- << static_cast<int>(scan->num_components)
- << ") mismatches the number of image components ("
- << static_cast<int>(frame_header.num_components) << ")";
- return false;
- }
- for (int i = 0; i < scan->num_components; i++) {
- JpegScanHeader::Component* component = &scan->components[i];
- READ_U8_OR_RETURN_FALSE(&component->component_selector);
- uint8_t dc_and_ac_selector;
- READ_U8_OR_RETURN_FALSE(&dc_and_ac_selector);
- component->dc_selector = dc_and_ac_selector / 16;
- component->ac_selector = dc_and_ac_selector % 16;
- if (component->component_selector != frame_header.components[i].id) {
- DLOG(ERROR) << "component selector mismatches image component id";
- return false;
- }
- if (component->dc_selector >= kJpegMaxHuffmanTableNumBaseline) {
- DLOG(ERROR) << "DC selector (" << static_cast<int>(component->dc_selector)
- << ") should be 0 or 1 for baseline mode";
- return false;
- }
- if (component->ac_selector >= kJpegMaxHuffmanTableNumBaseline) {
- DLOG(ERROR) << "AC selector (" << static_cast<int>(component->ac_selector)
- << ") should be 0 or 1 for baseline mode";
- return false;
- }
- }
- // Unused fields, only for value checking.
- uint8_t spectral_selection_start;
- uint8_t spectral_selection_end;
- uint8_t point_transform;
- READ_U8_OR_RETURN_FALSE(&spectral_selection_start);
- READ_U8_OR_RETURN_FALSE(&spectral_selection_end);
- READ_U8_OR_RETURN_FALSE(&point_transform);
- if (spectral_selection_start != 0 || spectral_selection_end != 63) {
- DLOG(ERROR) << "Spectral selection should be 0,63 for baseline mode";
- return false;
- }
- if (point_transform != 0) {
- DLOG(ERROR) << "Point transform should be 0 for baseline mode";
- return false;
- }
- return true;
- }
- // |eoi_begin_ptr| will point to the beginning of the EOI marker (the FF byte)
- // and |eoi_end_ptr| will point to the end of image (right after the end of the
- // EOI marker) after search succeeds. Returns true on EOI marker found, or false
- // otherwise.
- static bool SearchEOI(const uint8_t* buffer,
- size_t length,
- const char** eoi_begin_ptr,
- const char** eoi_end_ptr) {
- DCHECK(buffer);
- DCHECK(eoi_begin_ptr);
- DCHECK(eoi_end_ptr);
- BigEndianReader reader(buffer, length);
- uint8_t marker2;
- while (reader.remaining() > 0) {
- const char* marker1_ptr = static_cast<const char*>(
- memchr(reader.ptr(), JPEG_MARKER_PREFIX, reader.remaining()));
- if (!marker1_ptr)
- return false;
- reader.Skip(marker1_ptr - reinterpret_cast<const char*>(reader.ptr()) + 1);
- do {
- READ_U8_OR_RETURN_FALSE(&marker2);
- } while (marker2 == JPEG_MARKER_PREFIX); // skip fill bytes
- switch (marker2) {
- // Compressed data escape.
- case 0x00:
- break;
- // Restart
- case JPEG_RST0:
- case JPEG_RST1:
- case JPEG_RST2:
- case JPEG_RST3:
- case JPEG_RST4:
- case JPEG_RST5:
- case JPEG_RST6:
- case JPEG_RST7:
- break;
- case JPEG_EOI:
- *eoi_begin_ptr = marker1_ptr;
- *eoi_end_ptr = reinterpret_cast<const char*>(reader.ptr());
- return true;
- default:
- // Skip for other markers.
- uint16_t size;
- READ_U16_OR_RETURN_FALSE(&size);
- if (size < sizeof(size)) {
- DLOG(ERROR) << "Ill-formed JPEG. Segment size (" << size
- << ") is smaller than size field (" << sizeof(size)
- << ")";
- return false;
- }
- size -= sizeof(size);
- if (!reader.Skip(size)) {
- DLOG(ERROR) << "Ill-formed JPEG. Remaining size ("
- << reader.remaining()
- << ") is smaller than header specified (" << size << ")";
- return false;
- }
- break;
- }
- }
- return false;
- }
- // |result| is already initialized to 0 in ParseJpegPicture.
- static bool ParseSOI(const uint8_t* buffer,
- size_t length,
- JpegParseResult* result) {
- // Spec B.2.1 High-level syntax
- DCHECK(buffer);
- DCHECK(result);
- BigEndianReader reader(buffer, length);
- uint8_t marker1;
- uint8_t marker2;
- bool has_marker_dqt = false;
- bool has_marker_sos = false;
- // Once reached SOS, all neccesary data are parsed.
- while (!has_marker_sos) {
- READ_U8_OR_RETURN_FALSE(&marker1);
- if (marker1 != JPEG_MARKER_PREFIX)
- return false;
- do {
- READ_U8_OR_RETURN_FALSE(&marker2);
- } while (marker2 == JPEG_MARKER_PREFIX); // skip fill bytes
- uint16_t size;
- READ_U16_OR_RETURN_FALSE(&size);
- // The size includes the size field itself.
- if (size < sizeof(size)) {
- DLOG(ERROR) << "Ill-formed JPEG. Segment size (" << size
- << ") is smaller than size field (" << sizeof(size) << ")";
- return false;
- }
- size -= sizeof(size);
- if (reader.remaining() < size) {
- DLOG(ERROR) << "Ill-formed JPEG. Remaining size (" << reader.remaining()
- << ") is smaller than header specified (" << size << ")";
- return false;
- }
- switch (marker2) {
- case JPEG_SOF0:
- if (!ParseSOF(reader.ptr(), size, &result->frame_header)) {
- DLOG(ERROR) << "ParseSOF failed";
- return false;
- }
- break;
- case JPEG_SOF1:
- case JPEG_SOF2:
- case JPEG_SOF3:
- case JPEG_SOF5:
- case JPEG_SOF6:
- case JPEG_SOF7:
- case JPEG_SOF9:
- case JPEG_SOF10:
- case JPEG_SOF11:
- case JPEG_SOF13:
- case JPEG_SOF14:
- case JPEG_SOF15:
- DLOG(ERROR) << "Only SOF0 (baseline) is supported, but got SOF"
- << (marker2 - JPEG_SOF0);
- return false;
- case JPEG_DQT:
- if (!ParseDQT(reader.ptr(), size, result->q_table)) {
- DLOG(ERROR) << "ParseDQT failed";
- return false;
- }
- has_marker_dqt = true;
- break;
- case JPEG_DHT:
- if (!ParseDHT(reader.ptr(), size, result->dc_table, result->ac_table)) {
- DLOG(ERROR) << "ParseDHT failed";
- return false;
- }
- break;
- case JPEG_DRI:
- if (!ParseDRI(reader.ptr(), size, &result->restart_interval)) {
- DLOG(ERROR) << "ParseDRI failed";
- return false;
- }
- break;
- case JPEG_SOS:
- if (!ParseSOS(reader.ptr(), size, result->frame_header,
- &result->scan)) {
- DLOG(ERROR) << "ParseSOS failed";
- return false;
- }
- has_marker_sos = true;
- break;
- default:
- DVLOG(4) << "unknown marker " << static_cast<int>(marker2);
- break;
- }
- reader.Skip(size);
- }
- if (!has_marker_dqt) {
- DLOG(ERROR) << "No DQT marker found";
- return false;
- }
- // Scan data follows scan header immediately.
- result->data = reinterpret_cast<const char*>(reader.ptr());
- result->data_size = reader.remaining();
- return true;
- }
- bool ParseJpegPicture(const uint8_t* buffer,
- size_t length,
- JpegParseResult* result) {
- DCHECK(buffer);
- DCHECK(result);
- BigEndianReader reader(buffer, length);
- memset(result, 0, sizeof(JpegParseResult));
- uint8_t marker1, marker2;
- READ_U8_OR_RETURN_FALSE(&marker1);
- READ_U8_OR_RETURN_FALSE(&marker2);
- if (marker1 != JPEG_MARKER_PREFIX || marker2 != JPEG_SOI) {
- DLOG(ERROR) << "Not a JPEG";
- return false;
- }
- if (!ParseSOI(reader.ptr(), reader.remaining(), result))
- return false;
- // Update the sizes: |result->data_size| should not include the EOI marker or
- // beyond.
- BigEndianReader eoi_reader(reinterpret_cast<const uint8_t*>(result->data),
- result->data_size);
- const char* eoi_begin_ptr = nullptr;
- const char* eoi_end_ptr = nullptr;
- if (!SearchEOI(eoi_reader.ptr(), eoi_reader.remaining(), &eoi_begin_ptr,
- &eoi_end_ptr)) {
- DLOG(ERROR) << "SearchEOI failed";
- return false;
- }
- DCHECK(eoi_begin_ptr);
- DCHECK(eoi_end_ptr);
- result->data_size = eoi_begin_ptr - result->data;
- result->image_size = eoi_end_ptr - reinterpret_cast<const char*>(buffer);
- return true;
- }
- // TODO(andrescj): this function no longer seems necessary. Fix call sites to
- // use ParseJpegPicture() directly.
- bool ParseJpegStream(const uint8_t* buffer,
- size_t length,
- JpegParseResult* result) {
- DCHECK(buffer);
- DCHECK(result);
- return ParseJpegPicture(buffer, length, result);
- }
- } // namespace media
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