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Add long sector writing support and related error handling in write.c and context.h

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This commit is contained in:
Natalia Portillo
2025-10-03 17:46:40 +01:00
parent ec1811eb78
commit 879a41d5a1
4 changed files with 647 additions and 5 deletions
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8
include/aaruformat/context.h
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@@ -231,6 +231,14 @@ typedef struct aaruformatContext
blake3_hasher *blake3_context; ///< Opaque BLAKE3 context for streaming updates blake3_hasher *blake3_context; ///< Opaque BLAKE3 context for streaming updates
uint8_t currentTrackType; ///< Current track type (when writing optical images with tracks, needed for block uint8_t currentTrackType; ///< Current track type (when writing optical images with tracks, needed for block
///< compression type). ///< compression type).
bool writingLong; ///< True if writing long sectors
uint8_t *sectorPrefixBuffer; ///< Buffer for storing sector prefixes when writing optical images
uint8_t *sectorSuffixBuffer; ///< Buffer for storing sector suffixes when writing optical images
size_t sectorPrefixBufferLength; ///< Length of sectorPrefixBuffer
size_t sectorSuffixBufferLength; ///< Length of sectorSuffixBuffer
size_t sectorPrefixBufferOffset; ///< Current position in sectorPrefixBuffer
size_t sectorSuffixBufferOffset; ///< Current position in sectorSuffixBuffer
uint8_t *mode2_subheaders; ///< Buffer for storing MODE2 subheaders when writing MODE2 tracks
} aaruformatContext; } aaruformatContext;
/** \struct DumpHardwareEntriesWithData /** \struct DumpHardwareEntriesWithData

2
include/aaruformat/decls.h
View File

@@ -94,6 +94,8 @@ AARU_EXPORT int32_t AARU_CALL aaruf_read_sector_long(void *context, uint64_t sec
AARU_EXPORT int32_t AARU_CALL aaruf_write_sector(void *context, uint64_t sector_address, bool negative, AARU_EXPORT int32_t AARU_CALL aaruf_write_sector(void *context, uint64_t sector_address, bool negative,
const uint8_t *data, uint8_t sector_status, uint32_t length); const uint8_t *data, uint8_t sector_status, uint32_t length);
AARU_EXPORT int32_t AARU_CALL aaruf_write_sector_long(void *context, uint64_t sector_address, bool negative,
const uint8_t *data, uint8_t sector_status, uint32_t length);
AARU_EXPORT int32_t AARU_CALL aaruf_verify_image(void *context); AARU_EXPORT int32_t AARU_CALL aaruf_verify_image(void *context);

1
include/aaruformat/errors.h
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@@ -62,6 +62,7 @@
#define AARUF_ERROR_CANNOT_WRITE_BLOCK_HEADER (-23) ///< Failure writing block header. #define AARUF_ERROR_CANNOT_WRITE_BLOCK_HEADER (-23) ///< Failure writing block header.
#define AARUF_ERROR_CANNOT_WRITE_BLOCK_DATA (-24) ///< Failure writing block payload. #define AARUF_ERROR_CANNOT_WRITE_BLOCK_DATA (-24) ///< Failure writing block payload.
#define AARUF_ERROR_CANNOT_SET_DDT_ENTRY (-25) ///< Failed to encode/store a DDT entry (overflow or IO). #define AARUF_ERROR_CANNOT_SET_DDT_ENTRY (-25) ///< Failed to encode/store a DDT entry (overflow or IO).
#define AARUF_ERROR_INCORRECT_DATA_SIZE (-26) ///< Data size does not match expected size.
/** @} */ /** @} */
/** \name Non-fatal sector status codes (non-negative) /** \name Non-fatal sector status codes (non-negative)

641
src/write.c
View File

@@ -168,19 +168,19 @@ int32_t aaruf_write_sector(void *context, uint64_t sector_address, bool negative
} }
// Calculate MD5 on-the-fly if requested and sector is within user sectors (not negative or overflow) // Calculate MD5 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_md5 && !negative && sector_address <= ctx->imageInfo.Sectors) if(ctx->calculating_md5 && !negative && sector_address <= ctx->imageInfo.Sectors && !ctx->writingLong)
aaruf_md5_update(&ctx->md5_context, data, length); aaruf_md5_update(&ctx->md5_context, data, length);
// Calculate SHA1 on-the-fly if requested and sector is within user sectors (not negative or overflow) // Calculate SHA1 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_sha1 && !negative && sector_address <= ctx->imageInfo.Sectors) if(ctx->calculating_sha1 && !negative && sector_address <= ctx->imageInfo.Sectors && !ctx->writingLong)
aaruf_sha1_update(&ctx->sha1_context, data, length); aaruf_sha1_update(&ctx->sha1_context, data, length);
// Calculate SHA256 on-the-fly if requested and sector is within user sectors (not negative or overflow) // Calculate SHA256 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_sha256 && !negative && sector_address <= ctx->imageInfo.Sectors) if(ctx->calculating_sha256 && !negative && sector_address <= ctx->imageInfo.Sectors && !ctx->writingLong)
aaruf_sha256_update(&ctx->sha256_context, data, length); aaruf_sha256_update(&ctx->sha256_context, data, length);
// Calculate SpamSum on-the-fly if requested and sector is within user sectors (not negative or overflow) // Calculate SpamSum on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_sha256 && !negative && sector_address <= ctx->imageInfo.Sectors) if(ctx->calculating_sha256 && !negative && sector_address <= ctx->imageInfo.Sectors && !ctx->writingLong)
aaruf_spamsum_update(ctx->spamsum_context, data, length); aaruf_spamsum_update(ctx->spamsum_context, data, length);
// Calculate BLAKE3 on-the-fly if requested and sector is within user sectors (not negative or overflow) // Calculate BLAKE3 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_blake3 && !negative && sector_address <= ctx->imageInfo.Sectors) if(ctx->calculating_blake3 && !negative && sector_address <= ctx->imageInfo.Sectors && !ctx->writingLong)
blake3_hasher_update(ctx->blake3_context, data, length); blake3_hasher_update(ctx->blake3_context, data, length);
// Close current block first // Close current block first
@@ -308,6 +308,637 @@ int32_t aaruf_write_sector(void *context, uint64_t sector_address, bool negative
return AARUF_STATUS_OK; return AARUF_STATUS_OK;
} }
/**
* @brief Writes a full ("long") raw sector (2352 bytes) from optical media, splitting and validating structure.
*
* This function is specialized for raw CD sector ingestion when the caller provides the complete 2352-byte
* (or derived) raw sector including synchronization pattern, header (prefix), user data area and suffix
* (EDC/ECC / parity depending on the mode). It supports:
* - Audio (2352 bytes of PCM) and Data raw sectors which are simply forwarded to aaruf_write_sector().
* - CD Mode 1 sectors (sync + header + 2048 user bytes + EDC + ECC P + ECC Q).
* - CD Mode 2 (Form 1, Form 2 and Formless) sectors, handling sub-headers, EDC, and ECC as appropriate.
*
* For each sector, the function:
* 1. Locates the track definition covering the provided logical sector (LBA) and derives its type.
* 2. Validates input length (must be exactly 2352 for optical raw sectors at present).
* 3. Performs rewind detection: if sectors are written out of strictly increasing order, ongoing hash
* calculations (MD5, SHA1, SHA256, SpamSum, BLAKE3) are disabled to prevent incorrect streaming digests.
* 4. Optionally updates hash digests if still enabled and the sector lies within the user range (i.e. not
* negative / overflow) – this is performed on the full raw content for long sectors.
* 5. Splits the sector into prefix, user data, and suffix portions depending on mode and validates:
* - Prefix (sync + header) timing/address fields (MM:SS:FF → LBA) and mode byte.
* - For Mode 1: checks prefix conformity and ECC / EDC correctness via helper routines.
* - For Mode 2: distinguishes Form 1 vs Form 2 (bit flags), validates ECC (Form 1) and EDC (both forms),
* and extracts sub-header (8 bytes) for separate storage.
* 6. Stores anomalous (non-conforming or errored) prefix/suffix fragments into dynamically growing buffers
* (sectorPrefixBuffer / sectorSuffixBuffer) and records miniature DDT entries (sectorPrefixDdtMini /
* sectorSuffixDdtMini) with offsets and status bits. Correct standard patterns are recorded without
* copying (status code only) to save space.
* 7. Writes only the user data portion (2048 for Mode 1 & Mode 2 Form 1, 2324 for Mode 2 Form 2, 2352 for
* audio or for already treated Data) to the standard user data path by delegating to aaruf_write_sector(),
* passing an appropriate derived sector status (e.g. SectorStatusMode1Correct, SectorStatusMode2Form1Ok,
* SectorStatusErrored, etc.).
*
* Deduplication: Long sector handling itself does not directly hash for deduplication; dedupe is applied when
* aaruf_write_sector() is invoked for the extracted user data segment.
*
* Memory allocation strategy:
* - Mini DDT arrays (prefix/suffix) are lazily allocated on first need sized for the total addressable sector
* span (negative + user + overflow).
* - Prefix (16-byte units) and suffix buffers (288-byte units; or smaller copies for Form 2 EDC) grow by
* doubling when capacity would be exceeded.
* - Mode 2 sub-header storage (8 bytes per sector) is also lazily allocated.
*
* Address normalization: Internally a corrected index (corrected_sector_address) is computed by offsetting the
* raw logical sector number with the negative-region size to provide a linear index across negative, user and
* overflow regions.
*
* Sector status encoding (high nibble of 16-bit mini DDT entries):
* - SectorStatusMode1Correct / SectorStatusMode2Form1Ok / SectorStatusMode2Form2Ok / ... mark validated content.
* - SectorStatusErrored marks stored anomalous fragments whose data was copied into side buffers.
* - SectorStatusNotDumped marks all-zero (empty) raw sectors treated as not dumped.
* - Additional specific codes differentiate Mode 2 Form 2 without CRC vs with correct CRC, etc.
*
* Rewind side effects: Once a rewind is detected (writing an LBA <= previously written), all on-the-fly hash
* computations are disabled permanently for the session in order to maintain integrity guarantees of the
* produced digest values.
*
* Limitations / TODO:
* - BlockMedia (non-optical) handling is currently unimplemented and returns AARUF_ERROR_INCORRECT_MEDIA_TYPE.
* - Only 2352-byte raw sectors are accepted; other raw lengths (e.g. 2448 with subchannel) are not handled here.
* - Compression for block writing is not yet implemented (mirrors limitations of aaruf_write_sector()).
*
* Thread safety: This function is not thread-safe. The context carries mutable shared buffers and state.
*
* Error handling model: On encountering an error (allocation failure, bounds, incorrect size, media type) the
* function logs a fatal message via FATAL() and returns immediately with an appropriate negative error code.
* Partial allocations made earlier in the same call are not rolled back beyond what standard free-on-close does.
*
* Preconditions:
* - context is a valid aaruformatContext with magic == AARU_MAGIC.
* - Image opened for writing (isWriting == true).
* - sector_address within allowed negative / user / overflow ranges depending on 'negative'.
*
* Postconditions on success:
* - User data DDT updated (indirectly via aaruf_write_sector()).
* - For Mode 1 / Mode 2 sectors: prefix/suffix / sub-header metadata structures updated accordingly.
* - User data portion appended (buffered) into current block (or new block created) via aaruf_write_sector().
* - Hash contexts updated unless rewind occurred.
*
* @param context Pointer to the aaruformat context.
* @param sector_address Logical Block Address (LBA) for the raw sector (0-based user LBA,
* can include negative region when 'negative' is true).
* @param negative true if sector_address refers to the negative (pre-gap) region; false for user/overflow.
* @param data Pointer to 2352-byte raw sector buffer (sync+header+userdata+EDC/ECC) or audio PCM.
* @param sector_status Initial sector status hint provided by caller (may be overridden for derived writing call).
* @param length Length in bytes of the provided raw buffer. Must be exactly 2352 for optical sectors.
*
* @return One of:
* @retval AARUF_STATUS_OK Sector processed and (user data portion) queued/written successfully.
* @retval AARUF_ERROR_NOT_AARUFORMAT Invalid or NULL context / magic mismatch.
* @retval AARUF_READ_ONLY Image opened read-only.
* @retval AARUF_ERROR_SECTOR_OUT_OF_BOUNDS sector_address outside negative/user/overflow bounds.
* @retval AARUF_ERROR_INCORRECT_DATA_SIZE length != 2352 for optical disc long sector ingestion.
* @retval AARUF_ERROR_NOT_ENOUGH_MEMORY Failed to allocate or grow any required buffer (mini DDT,
* prefix, suffix, sub-headers).
* @retval AARUF_ERROR_INCORRECT_MEDIA_TYPE Media type unsupported for long sector writes (non OpticalDisc).
* @retval AARUF_ERROR_CANNOT_SET_DDT_ENTRY Propagated from underlying aaruf_write_sector() when DDT update fails.
* @retval AARUF_ERROR_CANNOT_WRITE_BLOCK_HEADER Propagated from block flush inside aaruf_write_sector().
* @retval AARUF_ERROR_CANNOT_WRITE_BLOCK_DATA Propagated from block flush inside aaruf_write_sector().
*
* @note The function returns immediately after delegating to aaruf_write_sector() for user data; any status
* described there may propagate. That function performs deduplication and block finalization.
*
* @warning Do not mix calls to aaruf_write_sector() and aaruf_write_sector_long() with out-of-order addresses
* if you rely on calculated digests; rewind will disable digest updates irrevocably.
*/
int32_t aaruf_write_sector_long(void *context, uint64_t sector_address, bool negative, const uint8_t *data,
uint8_t sector_status, uint32_t length)
{
TRACE("Entering aaruf_write_sector_long(%p, %" PRIu64 ", %d, %p, %u, %u)", context, sector_address, negative, data,
sector_status, length);
// Check context is correct AaruFormat context
if(context == NULL)
{
FATAL("Invalid context");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_AARUFORMAT");
return AARUF_ERROR_NOT_AARUFORMAT;
}
aaruformatContext *ctx = context;
// Not a libaaruformat context
if(ctx->magic != AARU_MAGIC)
{
FATAL("Invalid context");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_AARUFORMAT");
return AARUF_ERROR_NOT_AARUFORMAT;
}
// Check we are writing
if(!ctx->isWriting)
{
FATAL("Trying to write a read-only image");
TRACE("Exiting aaruf_write_sector() = AARUF_READ_ONLY");
return AARUF_READ_ONLY;
}
if(negative && sector_address > ctx->userDataDdtHeader.negative - 1)
{
FATAL("Sector address out of bounds");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_SECTOR_OUT_OF_BOUNDS");
return AARUF_ERROR_SECTOR_OUT_OF_BOUNDS;
}
if(!negative && sector_address > ctx->imageInfo.Sectors + ctx->userDataDdtHeader.overflow - 1)
{
FATAL("Sector address out of bounds");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_SECTOR_OUT_OF_BOUNDS");
return AARUF_ERROR_SECTOR_OUT_OF_BOUNDS;
}
switch(ctx->imageInfo.XmlMediaType)
{
case OpticalDisc:
TrackEntry track = {0};
for(int i = 0; i < ctx->tracksHeader.entries; i++)
if(sector_address >= ctx->trackEntries[i].start && sector_address <= ctx->trackEntries[i].end)
{
track = ctx->trackEntries[i];
break;
}
if(track.sequence == 0 && track.start == 0 && track.end == 0) track.type = Data;
if(length != 2352)
{
FATAL("Incorrect sector size");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_INCORRECT_DATA_SIZE");
return AARUF_ERROR_INCORRECT_DATA_SIZE;
}
ctx->writingLong = true;
if(!ctx->rewinded)
{
if(sector_address <= ctx->last_written_block)
{
TRACE("Rewinded");
ctx->rewinded = true;
// Disable MD5 calculation
if(ctx->calculating_md5) ctx->calculating_md5 = false;
// Disable SHA1 calculation
if(ctx->calculating_sha1) ctx->calculating_sha1 = false;
// Disable SHA256 calculation
if(ctx->calculating_sha256) ctx->calculating_sha256 = false;
// Disable SpamSum calculation
if(ctx->calculating_spamsum) ctx->calculating_spamsum = false;
// Disable BLAKE3 calculation
if(ctx->calculating_blake3) ctx->calculating_blake3 = false;
}
else
ctx->last_written_block = sector_address;
}
// Calculate MD5 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_md5 && !negative && sector_address <= ctx->imageInfo.Sectors)
aaruf_md5_update(&ctx->md5_context, data, length);
// Calculate SHA1 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_sha1 && !negative && sector_address <= ctx->imageInfo.Sectors)
aaruf_sha1_update(&ctx->sha1_context, data, length);
// Calculate SHA256 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_sha256 && !negative && sector_address <= ctx->imageInfo.Sectors)
aaruf_sha256_update(&ctx->sha256_context, data, length);
// Calculate SpamSum on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_sha256 && !negative && sector_address <= ctx->imageInfo.Sectors)
aaruf_spamsum_update(ctx->spamsum_context, data, length);
// Calculate BLAKE3 on-the-fly if requested and sector is within user sectors (not negative or overflow)
if(ctx->calculating_blake3 && !negative && sector_address <= ctx->imageInfo.Sectors)
blake3_hasher_update(ctx->blake3_context, data, length);
bool prefix_correct;
uint64_t corrected_sector_address = sector_address;
// Calculate positive or negative sector
if(negative)
corrected_sector_address -= ctx->userDataDdtHeader.negative;
else
corrected_sector_address += ctx->userDataDdtHeader.negative;
// Split raw cd sector data in prefix (sync, header), user data and suffix (edc, ecc p, ecc q)
switch(track.type)
{
case Audio:
case Data:
return aaruf_write_sector(context, sector_address, negative, data, sector_status, length);
case CdMode1:
// If we do not have a DDT V2 for sector prefix, create one
if(ctx->sectorPrefixDdtMini == NULL)
{
ctx->sectorPrefixDdtMini =
calloc(1, sizeof(uint16_t) * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow));
if(ctx->sectorPrefixDdtMini == NULL)
{
FATAL("Could not allocate memory for CD sector prefix DDT");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
// If we do not have a DDT V2 for sector suffix, create one
if(ctx->sectorSuffixDdtMini == NULL)
{
ctx->sectorSuffixDdtMini =
calloc(1, sizeof(uint16_t) * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow));
if(ctx->sectorSuffixDdtMini == NULL)
{
FATAL("Could not allocate memory for CD sector prefix DDT");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
if(ctx->sectorPrefixBuffer == NULL)
{
ctx->sectorPrefixBufferLength = 16 * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow);
ctx->sectorPrefixBuffer = malloc(ctx->sectorPrefixBufferLength);
if(ctx->sectorPrefixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector prefix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
if(ctx->sectorSuffixBuffer == NULL)
{
ctx->sectorSuffixBufferLength =
288 * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow);
ctx->sectorSuffixBuffer = malloc(ctx->sectorSuffixBufferLength);
if(ctx->sectorSuffixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector suffix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
bool empty = true;
for(int i = 0; i < length; i++)
if(data[i] != 0)
{
empty = false;
break;
}
if(empty)
{
ctx->sectorPrefixDdtMini[corrected_sector_address] = SectorStatusNotDumped;
ctx->sectorSuffixDdtMini[corrected_sector_address] = SectorStatusNotDumped;
return aaruf_write_sector(context, sector_address, negative, data + 16, SectorStatusNotDumped,
2048);
}
prefix_correct = true;
if(data[0x00] != 0x00 || data[0x01] != 0xFF || data[0x02] != 0xFF || data[0x03] != 0xFF ||
data[0x04] != 0xFF || data[0x05] != 0xFF || data[0x06] != 0xFF || data[0x07] != 0xFF ||
data[0x08] != 0xFF || data[0x09] != 0xFF || data[0x0A] != 0xFF || data[0x0B] != 0x00 ||
data[0x0F] != 0x01)
prefix_correct = false;
if(prefix_correct)
{
const int minute = (data[0x0C] >> 4) * 10 + (data[0x0C] & 0x0F);
const int second = (data[0x0D] >> 4) * 10 + (data[0x0D] & 0x0F);
const int frame = (data[0x0E] >> 4) * 10 + (data[0x0E] & 0x0F);
const int stored_lba = minute * 60 * 75 + second * 75 + frame - 150;
prefix_correct = stored_lba == sector_address;
}
if(prefix_correct)
ctx->sectorPrefixDdtMini[corrected_sector_address] = SectorStatusMode1Correct << 12;
else
{
// Copy CD prefix from data buffer to prefix buffer
memcpy(ctx->sectorPrefixBuffer + ctx->sectorPrefixBufferOffset, data, 16);
ctx->sectorPrefixDdtMini[corrected_sector_address] =
(uint16_t)(ctx->sectorPrefixBufferOffset / 16);
ctx->sectorPrefixDdtMini[corrected_sector_address] |= SectorStatusErrored << 12;
ctx->sectorPrefixBufferOffset += 16;
// Grow prefix buffer if needed
if(ctx->sectorPrefixBufferOffset >= ctx->sectorPrefixBufferLength)
{
ctx->sectorPrefixBufferLength *= 2;
ctx->sectorPrefixBuffer = realloc(ctx->sectorPrefixBuffer, ctx->sectorPrefixBufferLength);
if(ctx->sectorPrefixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector prefix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
}
const bool suffix_correct = aaruf_ecc_cd_is_suffix_correct(context, data);
if(suffix_correct)
ctx->sectorSuffixDdtMini[corrected_sector_address] = SectorStatusMode1Correct << 12;
else
{
// Copy CD suffix from data buffer to suffix buffer
memcpy(ctx->sectorSuffixBuffer + ctx->sectorSuffixBufferOffset, data + 2064, 288);
ctx->sectorSuffixDdtMini[corrected_sector_address] =
(uint16_t)(ctx->sectorSuffixBufferOffset / 288);
ctx->sectorSuffixDdtMini[corrected_sector_address] |= SectorStatusErrored << 12;
ctx->sectorSuffixBufferOffset += 288;
// Grow suffix buffer if needed
if(ctx->sectorSuffixBufferOffset >= ctx->sectorSuffixBufferLength)
{
ctx->sectorSuffixBufferLength *= 2;
ctx->sectorSuffixBuffer = realloc(ctx->sectorSuffixBuffer, ctx->sectorSuffixBufferLength);
if(ctx->sectorSuffixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector suffix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
}
return aaruf_write_sector(context, sector_address, negative, data + 16, SectorStatusMode1Correct,
2048);
case CdMode2Form1:
case CdMode2Form2:
case CdMode2Formless:
// If we do not have a DDT V2 for sector prefix, create one
if(ctx->sectorPrefixDdtMini == NULL)
{
ctx->sectorPrefixDdtMini =
calloc(1, sizeof(uint16_t) * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow));
if(ctx->sectorPrefixDdtMini == NULL)
{
FATAL("Could not allocate memory for CD sector prefix DDT");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
// If we do not have a DDT V2 for sector suffix, create one
if(ctx->sectorSuffixDdtMini == NULL)
{
ctx->sectorSuffixDdtMini =
calloc(1, sizeof(uint16_t) * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow));
if(ctx->sectorSuffixDdtMini == NULL)
{
FATAL("Could not allocate memory for CD sector prefix DDT");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
if(ctx->sectorPrefixBuffer == NULL)
{
ctx->sectorPrefixBufferLength = 16 * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow);
ctx->sectorPrefixBuffer = malloc(ctx->sectorPrefixBufferLength);
if(ctx->sectorPrefixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector prefix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
if(ctx->sectorSuffixBuffer == NULL)
{
ctx->sectorSuffixBufferLength =
288 * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow);
ctx->sectorSuffixBuffer = malloc(ctx->sectorSuffixBufferLength);
if(ctx->sectorSuffixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector suffix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
empty = true;
for(int i = 0; i < length; i++)
if(data[i] != 0)
{
empty = false;
break;
}
if(empty)
{
ctx->sectorPrefixDdtMini[corrected_sector_address] = SectorStatusNotDumped;
ctx->sectorSuffixDdtMini[corrected_sector_address] = SectorStatusNotDumped;
return aaruf_write_sector(context, sector_address, negative, data + 16, SectorStatusNotDumped,
2328);
}
const bool form2 = (data[18] & 0x20) == 0x20 || (data[22] & 0x20) == 0x20;
prefix_correct = true;
if(data[0x00] != 0x00 || data[0x01] != 0xFF || data[0x02] != 0xFF || data[0x03] != 0xFF ||
data[0x04] != 0xFF || data[0x05] != 0xFF || data[0x06] != 0xFF || data[0x07] != 0xFF ||
data[0x08] != 0xFF || data[0x09] != 0xFF || data[0x0A] != 0xFF || data[0x0B] != 0x00 ||
data[0x0F] != 0x02)
prefix_correct = false;
if(prefix_correct)
{
const int minute = (data[0x0C] >> 4) * 10 + (data[0x0C] & 0x0F);
const int second = (data[0x0D] >> 4) * 10 + (data[0x0D] & 0x0F);
const int frame = (data[0x0E] >> 4) * 10 + (data[0x0E] & 0x0F);
const int stored_lba = minute * 60 * 75 + second * 75 + frame - 150;
prefix_correct = stored_lba == sector_address;
}
if(prefix_correct)
ctx->sectorPrefixDdtMini[corrected_sector_address] =
(form2 ? SectorStatusMode2Form2Ok : SectorStatusMode2Form1Ok) << 12;
else
{
// Copy CD prefix from data buffer to prefix buffer
memcpy(ctx->sectorPrefixBuffer + ctx->sectorPrefixBufferOffset, data, 16);
ctx->sectorPrefixDdtMini[corrected_sector_address] =
(uint16_t)(ctx->sectorPrefixBufferOffset / 16);
ctx->sectorPrefixDdtMini[corrected_sector_address] |= SectorStatusErrored << 12;
ctx->sectorPrefixBufferOffset += 16;
// Grow prefix buffer if needed
if(ctx->sectorPrefixBufferOffset >= ctx->sectorPrefixBufferLength)
{
ctx->sectorPrefixBufferLength *= 2;
ctx->sectorPrefixBuffer = realloc(ctx->sectorPrefixBuffer, ctx->sectorPrefixBufferLength);
if(ctx->sectorPrefixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector prefix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
}
if(ctx->mode2_subheaders == NULL)
{
ctx->mode2_subheaders =
calloc(1, 8 * (ctx->userDataDdtHeader.negative + ctx->imageInfo.Sectors +
ctx->userDataDdtHeader.overflow));
if(ctx->mode2_subheaders == NULL)
{
FATAL("Could not allocate memory for CD mode 2 subheader buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
if(form2)
{
const uint32_t computed_edc = aaruf_edc_cd_compute(context, 0, data, 0x91C, 0x10);
const uint32_t edc = *(data + 0x92C);
const bool correct_edc = computed_edc == edc;
if(correct_edc)
ctx->sectorSuffixDdtMini[corrected_sector_address] = SectorStatusMode2Form2Ok << 12;
else if(edc == 0)
ctx->sectorSuffixDdtMini[corrected_sector_address] = SectorStatusMode2Form2NoCrc << 12;
else
{
// Copy CD suffix from data buffer to suffix buffer
memcpy(ctx->sectorSuffixBuffer + ctx->sectorSuffixBufferOffset, data + 2348, 4);
ctx->sectorSuffixDdtMini[corrected_sector_address] =
(uint16_t)(ctx->sectorSuffixBufferOffset / 288);
ctx->sectorSuffixDdtMini[corrected_sector_address] |= SectorStatusErrored << 12;
ctx->sectorSuffixBufferOffset += 288;
// Grow suffix buffer if needed
if(ctx->sectorSuffixBufferOffset >= ctx->sectorSuffixBufferLength)
{
ctx->sectorSuffixBufferLength *= 2;
ctx->sectorSuffixBuffer =
realloc(ctx->sectorSuffixBuffer, ctx->sectorSuffixBufferLength);
if(ctx->sectorSuffixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector suffix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
}
// Copy subheader from data buffer to subheader buffer
memcpy(ctx->mode2_subheaders + corrected_sector_address * 8, data + 0x10, 8);
return aaruf_write_sector(context, sector_address, negative, data + 24,
edc == 0 ? SectorStatusMode2Form2NoCrc
: correct_edc ? SectorStatusMode2Form2Ok
: SectorStatusErrored,
2324);
}
const bool correct_ecc = aaruf_ecc_cd_is_suffix_correct_mode2(context, data);
const uint32_t computed_edc = aaruf_edc_cd_compute(context, 0, data, 0x808, 0x10);
const uint32_t edc = *(data + 0x818);
const bool correct_edc = computed_edc == edc;
if(correct_ecc && correct_edc)
ctx->sectorSuffixDdtMini[corrected_sector_address] = SectorStatusMode2Form1Ok << 12;
else
{
// Copy CD suffix from data buffer to suffix buffer
memcpy(ctx->sectorSuffixBuffer + ctx->sectorSuffixBufferOffset, data + 2072, 280);
ctx->sectorSuffixDdtMini[corrected_sector_address] =
(uint16_t)(ctx->sectorSuffixBufferOffset / 288);
ctx->sectorSuffixDdtMini[corrected_sector_address] |= SectorStatusErrored << 12;
ctx->sectorSuffixBufferOffset += 288;
// Grow suffix buffer if needed
if(ctx->sectorSuffixBufferOffset >= ctx->sectorSuffixBufferLength)
{
ctx->sectorSuffixBufferLength *= 2;
ctx->sectorSuffixBuffer = realloc(ctx->sectorSuffixBuffer, ctx->sectorSuffixBufferLength);
if(ctx->sectorSuffixBuffer == NULL)
{
FATAL("Could not allocate memory for CD sector suffix buffer");
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_NOT_ENOUGH_MEMORY");
return AARUF_ERROR_NOT_ENOUGH_MEMORY;
}
}
}
// Copy subheader from data buffer to subheader buffer
memcpy(ctx->mode2_subheaders + corrected_sector_address * 8, data + 0x10, 8);
return aaruf_write_sector(
context, sector_address, negative, data + 24,
correct_edc && correct_ecc ? SectorStatusMode2Form1Ok : SectorStatusErrored, 2048);
}
break;
case BlockMedia:
// TODO: Implement
break;
default:
TRACE("Exiting aaruf_write_sector() = AARUF_ERROR_INCORRECT_MEDIA_TYPE");
return AARUF_ERROR_INCORRECT_MEDIA_TYPE;
}
// Fallback return when media type branch does not produce a value (satisfy non-void contract)
return AARUF_ERROR_INCORRECT_MEDIA_TYPE;
}
int32_t aaruf_close_current_block(aaruformatContext *ctx) int32_t aaruf_close_current_block(aaruformatContext *ctx)
{ {
// Not a libaaruformat context // Not a libaaruformat context