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Diffstat (limited to '')
| -rw-r--r-- | xbmc/filesystem/CDDAFile.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/xbmc/filesystem/CDDAFile.cpp b/xbmc/filesystem/CDDAFile.cpp new file mode 100644 index 0000000..cd98b08 --- /dev/null +++ b/xbmc/filesystem/CDDAFile.cpp @@ -0,0 +1,227 @@ +/* + * Copyright (C) 2005-2018 Team Kodi + * This file is part of Kodi - https://kodi.tv + * + * SPDX-License-Identifier: GPL-2.0-or-later + * See LICENSES/README.md for more information. + */ + +#include "CDDAFile.h" + +#include "ServiceBroker.h" +#include "URL.h" +#include "storage/MediaManager.h" +#include "utils/URIUtils.h" +#include "utils/log.h" + +#include <algorithm> + +#include <sys/stat.h> + +using namespace MEDIA_DETECT; +using namespace XFILE; + +CFileCDDA::CFileCDDA(void) +{ + m_pCdIo = NULL; + m_cdio = CLibcdio::GetInstance(); + m_iSectorCount = 52; +} + +CFileCDDA::~CFileCDDA(void) +{ + Close(); +} + +bool CFileCDDA::Open(const CURL& url) +{ + std::string strURL = url.GetWithoutFilename(); + + if (!CServiceBroker::GetMediaManager().IsDiscInDrive(strURL) || !IsValidFile(url)) + return false; + + // Open the dvd drive +#ifdef TARGET_POSIX + m_pCdIo = m_cdio->cdio_open(CServiceBroker::GetMediaManager().TranslateDevicePath(strURL).c_str(), + DRIVER_UNKNOWN); +#elif defined(TARGET_WINDOWS) + m_pCdIo = m_cdio->cdio_open_win32( + CServiceBroker::GetMediaManager().TranslateDevicePath(strURL, true).c_str()); +#endif + if (!m_pCdIo) + { + CLog::Log(LOGERROR, "file cdda: Opening the dvd drive failed"); + return false; + } + + int iTrack = GetTrackNum(url); + + m_lsnStart = m_cdio->cdio_get_track_lsn(m_pCdIo, iTrack); + m_lsnEnd = m_cdio->cdio_get_track_last_lsn(m_pCdIo, iTrack); + m_lsnCurrent = m_lsnStart; + + if (m_lsnStart == CDIO_INVALID_LSN || m_lsnEnd == CDIO_INVALID_LSN) + { + m_cdio->cdio_destroy(m_pCdIo); + m_pCdIo = NULL; + return false; + } + + return true; +} + +bool CFileCDDA::Exists(const CURL& url) +{ + if (!IsValidFile(url)) + return false; + + int iTrack = GetTrackNum(url); + + if (!Open(url)) + return false; + + int iLastTrack = m_cdio->cdio_get_last_track_num(m_pCdIo); + if (iLastTrack == CDIO_INVALID_TRACK) + return false; + + return (iTrack > 0 && iTrack <= iLastTrack); +} + +int CFileCDDA::Stat(const CURL& url, struct __stat64* buffer) +{ + if (Open(url) && buffer) + { + *buffer = {}; + buffer->st_size = GetLength(); + buffer->st_mode = _S_IFREG; + Close(); + return 0; + } + errno = ENOENT; + return -1; +} + +ssize_t CFileCDDA::Read(void* lpBuf, size_t uiBufSize) +{ + if (!m_pCdIo || !CServiceBroker::GetMediaManager().IsDiscInDrive()) + return -1; + + if (uiBufSize > SSIZE_MAX) + uiBufSize = SSIZE_MAX; + + // limit number of sectors that fits in buffer by m_iSectorCount + int iSectorCount = std::min((int)uiBufSize / CDIO_CD_FRAMESIZE_RAW, m_iSectorCount); + + if (iSectorCount <= 0) + return -1; + + // Are there enough sectors left to read + if (m_lsnCurrent + iSectorCount > m_lsnEnd) + iSectorCount = m_lsnEnd - m_lsnCurrent; + + // The loop tries to solve read error problem by lowering number of sectors to read (iSectorCount). + // When problem is solved the proper number of sectors is stored in m_iSectorCount + int big_iSectorCount = iSectorCount; + while (iSectorCount > 0) + { + int iret = m_cdio->cdio_read_audio_sectors(m_pCdIo, lpBuf, m_lsnCurrent, iSectorCount); + + if (iret == DRIVER_OP_SUCCESS) + { + // If lower iSectorCount solved the problem limit it's value + if (iSectorCount < big_iSectorCount) + { + m_iSectorCount = iSectorCount; + } + break; + } + + // iSectorCount is low so it cannot solve read problem + if (iSectorCount <= 10) + { + CLog::Log(LOGERROR, + "file cdda: Reading {} sectors of audio data starting at lsn {} failed with error " + "code {}", + iSectorCount, m_lsnCurrent, iret); + return -1; + } + + iSectorCount = 10; + } + m_lsnCurrent += iSectorCount; + + return iSectorCount*CDIO_CD_FRAMESIZE_RAW; +} + +int64_t CFileCDDA::Seek(int64_t iFilePosition, int iWhence /*=SEEK_SET*/) +{ + if (!m_pCdIo) + return -1; + + lsn_t lsnPosition = (int)iFilePosition / CDIO_CD_FRAMESIZE_RAW; + + switch (iWhence) + { + case SEEK_SET: + // cur = pos + m_lsnCurrent = m_lsnStart + lsnPosition; + break; + case SEEK_CUR: + // cur += pos + m_lsnCurrent += lsnPosition; + break; + case SEEK_END: + // end += pos + m_lsnCurrent = m_lsnEnd + lsnPosition; + break; + default: + return -1; + } + + return ((int64_t)(m_lsnCurrent -m_lsnStart)*CDIO_CD_FRAMESIZE_RAW); +} + +void CFileCDDA::Close() +{ + if (m_pCdIo) + { + m_cdio->cdio_destroy(m_pCdIo); + m_pCdIo = NULL; + } +} + +int64_t CFileCDDA::GetPosition() +{ + if (!m_pCdIo) + return 0; + + return ((int64_t)(m_lsnCurrent -m_lsnStart)*CDIO_CD_FRAMESIZE_RAW); +} + +int64_t CFileCDDA::GetLength() +{ + if (!m_pCdIo) + return 0; + + return ((int64_t)(m_lsnEnd -m_lsnStart)*CDIO_CD_FRAMESIZE_RAW); +} + +bool CFileCDDA::IsValidFile(const CURL& url) +{ + // Only .cdda files are supported + return URIUtils::HasExtension(url.Get(), ".cdda"); +} + +int CFileCDDA::GetTrackNum(const CURL& url) +{ + std::string strFileName = url.Get(); + + // get track number from "cdda://local/01.cdda" + return atoi(strFileName.substr(13, strFileName.size() - 13 - 5).c_str()); +} + +#define SECTOR_COUNT 52 // max. sectors that can be read at once +int CFileCDDA::GetChunkSize() +{ + return SECTOR_COUNT*CDIO_CD_FRAMESIZE_RAW; +} |