// 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 #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(precision) << " bit for baseline"; return false; } if (!InRange(frame_header->num_components, 1, std::size(frame_header->components))) { DLOG(ERROR) << "num_components=" << static_cast(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(component.id) << ") should be <= num_components (" << static_cast(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(component.horizontal_sampling_factor); return false; } if (!InRange(component.vertical_sampling_factor, 1, 4)) { DVLOG(1) << "Invalid vertical sampling factor " << static_cast(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(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(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(scan->num_components) << ") mismatches the number of image components (" << static_cast(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(component->dc_selector) << ") should be 0 or 1 for baseline mode"; return false; } if (component->ac_selector >= kJpegMaxHuffmanTableNumBaseline) { DLOG(ERROR) << "AC selector (" << static_cast(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( memchr(reader.ptr(), JPEG_MARKER_PREFIX, reader.remaining())); if (!marker1_ptr) return false; reader.Skip(marker1_ptr - reinterpret_cast(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(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(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(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(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(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