diff options
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/audiocd/linux/linux-audiocd.cpp | 350 | ||||
| -rw-r--r-- | backends/audiocd/linux/linux-audiocd.h | 38 | ||||
| -rw-r--r-- | backends/module.mk | 5 | ||||
| -rw-r--r-- | backends/platform/sdl/posix/posix.cpp | 12 | ||||
| -rw-r--r-- | backends/platform/sdl/posix/posix.h | 5 |
5 files changed, 410 insertions, 0 deletions
diff --git a/backends/audiocd/linux/linux-audiocd.cpp b/backends/audiocd/linux/linux-audiocd.cpp new file mode 100644 index 0000000000..a173a9d3be --- /dev/null +++ b/backends/audiocd/linux/linux-audiocd.cpp @@ -0,0 +1,350 @@ +/* Cabal - Legacy Game Implementations + * + * Cabal is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <linux/cdrom.h> +#include <sys/ioctl.h> +#include <sys/stat.h> + +#include "backends/audiocd/linux/linux-audiocd.h" + +#include "audio/audiostream.h" +#include "backends/audiocd/default/default-audiocd.h" +#include "common/array.h" +#include "common/str.h" +#include "common/debug.h" + +enum { + kLeadoutTrack = 0xAA +}; + +enum { + kBytesPerFrame = 2352, + kSamplesPerFrame = kBytesPerFrame / 2 +}; + +enum { + kSecondsPerMinute = 60, + kFramesPerSecond = 75 +}; + +static int getFrameCount(const cdrom_msf0 &msf) { + int time = msf.minute; + time *= kSecondsPerMinute; + time += msf.second; + time *= kFramesPerSecond; + time += msf.frame; + return time; +} + +class LinuxAudioCDStream : public Audio::SeekableAudioStream { +public: + LinuxAudioCDStream(int fd, const cdrom_tocentry &startEntry, const cdrom_tocentry &endEntry); + + int readBuffer(int16 *buffer, const int numSamples); + bool isStereo() const { return true; } + int getRate() const { return 44100; } + bool endOfData() const; + bool seek(const Audio::Timestamp &where); + Audio::Timestamp getLength() const; + +private: + int _fd; + const cdrom_tocentry &_startEntry, &_endEntry; + int16 _buffer[kSamplesPerFrame]; + int _frame; + uint _bufferPos; +}; + +LinuxAudioCDStream::LinuxAudioCDStream(int fd, const cdrom_tocentry &startEntry, const cdrom_tocentry &endEntry) : + _fd(fd), _startEntry(startEntry), _endEntry(endEntry), _buffer(), _frame(0), _bufferPos(kSamplesPerFrame) { +} + +int LinuxAudioCDStream::readBuffer(int16 *buffer, const int numSamples) { + int samples = 0; + + // See if any data is left first + while (_bufferPos < kSamplesPerFrame && samples < numSamples) + buffer[samples++] = _buffer[_bufferPos++]; + + // Bail out if done + if (endOfData()) + return samples; + + while (samples < numSamples && !endOfData()) { + // Figure out the MSF of the frame we're looking for + int frame = _frame + getFrameCount(_startEntry.cdte_addr.msf); + + int seconds = frame / kFramesPerSecond; + frame %= kFramesPerSecond; + int minutes = seconds / kSecondsPerMinute; + seconds %= kSecondsPerMinute; + + // Request to read that frame + cdrom_read_audio readAudio; + readAudio.addr.msf.minute = minutes; + readAudio.addr.msf.second = seconds; + readAudio.addr.msf.frame = frame; + readAudio.addr_format = CDROM_MSF; + readAudio.nframes = 1; + readAudio.buf = reinterpret_cast<__u8*>(_buffer); + + if (ioctl(_fd, CDROMREADAUDIO, &readAudio) < 0) { + warning("Failed to read audio"); + _frame = getFrameCount(_endEntry.cdte_addr.msf); + return samples; + } + + _frame++; + + // Copy the samples over + for (_bufferPos = 0; _bufferPos < kSamplesPerFrame && samples < numSamples; ) + buffer[samples++] = _buffer[_bufferPos++]; + } + + return samples; +} + +bool LinuxAudioCDStream::endOfData() const { + return getFrameCount(_startEntry.cdte_addr.msf) + _frame >= getFrameCount(_endEntry.cdte_addr.msf) && _bufferPos == kSamplesPerFrame; +} + +bool LinuxAudioCDStream::seek(const Audio::Timestamp &where) { + // Convert to the frame number + // Really not much else needed + _bufferPos = kSamplesPerFrame; + _frame = where.convertToFramerate(kFramesPerSecond).totalNumberOfFrames(); + return true; +} + +Audio::Timestamp LinuxAudioCDStream::getLength() const { + return Audio::Timestamp(0, getFrameCount(_endEntry.cdte_addr.msf) - getFrameCount(_startEntry.cdte_addr.msf), 75); +} + +class LinuxAudioCDManager : public DefaultAudioCDManager { +public: + LinuxAudioCDManager(); + ~LinuxAudioCDManager(); + + bool openCD(int drive); + void closeCD(); + void playCD(int track, int numLoops, int startFrame, int duration); + +private: + struct Device { + Device(const Common::String &n, dev_t m) : name(n), mode(m) {} + Common::String name; + dev_t mode; + }; + + Common::Array<Device> scanDevices(); + bool tryAddDrive(const Common::String &drive, Common::Array<Device> &devices); + bool loadTOC(); + + int _fd; + cdrom_tochdr _tocHeader; + Common::Array<cdrom_tocentry> _tocEntries; +}; + +static bool isTrayEmpty(int errorNumber) { + switch (errorNumber) { + case EIO: + case ENOENT: + case EINVAL: +#ifdef ENOMEDIUM + case ENOMEDIUM: +#endif + return true; + } + + return false; +} + +LinuxAudioCDManager::LinuxAudioCDManager() { + _fd = -1; + memset(&_tocHeader, 0, sizeof(_tocHeader)); +} + +LinuxAudioCDManager::~LinuxAudioCDManager() { + closeCD(); +} + +bool LinuxAudioCDManager::openCD(int drive) { + closeCD(); + + Common::Array<Device> devices = scanDevices(); + if (devices.empty()) + return false; + + _fd = open(devices[0].name.c_str(), O_RDONLY | O_NONBLOCK, 0); + if (_fd < 0) + return false; + + if (!loadTOC()) { + closeCD(); + return false; + } + + return true; +} + +void LinuxAudioCDManager::closeCD() { + if (_fd < 0) + return; + + stop(); + close(_fd); + memset(&_tocHeader, 0, sizeof(_tocHeader)); + _tocEntries.clear(); +} + +void LinuxAudioCDManager::playCD(int track, int numLoops, int startFrame, int duration) { + // Stop any previous track + stop(); + + // HACK: For now, just assume that track number is right + // That only works because ScummVM uses the wrong track number anyway + + if (track >= (int)_tocEntries.size() - 1) { + warning("No such track %d", track); + return; + } + + // Bail if the track isn't an audio track + if ((_tocEntries[track].cdte_ctrl & 0x04) != 0) { + warning("Track %d is not audio", track); + return; + } + + // Create the AudioStream and play it + debug(1, "Playing CD track %d", track); + + Audio::SeekableAudioStream *audioStream = new LinuxAudioCDStream(_fd, _tocEntries[track], _tocEntries[track + 1]); + + Audio::Timestamp start = Audio::Timestamp(0, startFrame, 75); + Audio::Timestamp end = (duration == 0) ? audioStream->getLength() : Audio::Timestamp(0, startFrame + duration, 75); + + // Fake emulation since we're really playing an AudioStream + _emulating = true; + + _mixer->playStream( + Audio::Mixer::kMusicSoundType, + &_handle, + Audio::makeLoopingAudioStream(audioStream, start, end, (numLoops < 1) ? numLoops + 1 : numLoops), + -1, + _cd.volume, + _cd.balance, + DisposeAfterUse::YES, + true); +} + +Common::Array<LinuxAudioCDManager::Device> LinuxAudioCDManager::scanDevices() { + Common::Array<Device> devices; + tryAddDrive("/dev/cdrom", devices); + return devices; +} + +bool LinuxAudioCDManager::tryAddDrive(const Common::String &drive, Common::Array<Device> &devices) { + struct stat stbuf; + if (stat(drive.c_str(), &stbuf) < 0) + return false; + + // Must be a character or block device + if (!S_ISCHR(stbuf.st_mode) && !S_ISBLK(stbuf.st_mode)) + return false; + + // Try opening the device and seeing if it is a CD-ROM drve + int fd = open(drive.c_str(), O_RDONLY | O_NONBLOCK, 0); + if (fd >= 0) { + cdrom_subchnl info; + info.cdsc_format = CDROM_MSF; + + bool isCD = ioctl(fd, CDROMSUBCHNL, &info) == 0 || isTrayEmpty(errno); + close(fd); + if (isCD) { + devices.push_back(Device(drive, stbuf.st_rdev)); + return true; + } + } + + return false; +} + +bool LinuxAudioCDManager::loadTOC() { + if (_fd < 0) + return false; + + if (ioctl(_fd, CDROMREADTOCHDR, &_tocHeader) < 0) + return false; + + debug(4, "CD: Start Track: %d, End Track %d", _tocHeader.cdth_trk0, _tocHeader.cdth_trk1); + + for (int i = _tocHeader.cdth_trk0; i <= _tocHeader.cdth_trk1; i++) { + cdrom_tocentry entry; + memset(&entry, 0, sizeof(entry)); + entry.cdte_track = i; + entry.cdte_format = CDROM_MSF; + + if (ioctl(_fd, CDROMREADTOCENTRY, &entry) < 0) + return false; + +#if 0 + debug("Entry:"); + debug("\tTrack: %d", entry.cdte_track); + debug("\tAdr: %d", entry.cdte_adr); + debug("\tCtrl: %d", entry.cdte_ctrl); + debug("\tFormat: %d", entry.cdte_format); + debug("\tMSF: %d:%d:%d", entry.cdte_addr.msf.minute, entry.cdte_addr.msf.second, entry.cdte_addr.msf.frame); + debug("\tMode: %d\n", entry.cdte_datamode); +#endif + + _tocEntries.push_back(entry); + } + + // Fetch the leadout so we can get the length of the last frame + cdrom_tocentry entry; + memset(&entry, 0, sizeof(entry)); + entry.cdte_track = kLeadoutTrack; + entry.cdte_format = CDROM_MSF; + + if (ioctl(_fd, CDROMREADTOCENTRY, &entry) < 0) + return false; + +#if 0 + debug("Lead out:"); + debug("\tTrack: %d", entry.cdte_track); + debug("\tAdr: %d", entry.cdte_adr); + debug("\tCtrl: %d", entry.cdte_ctrl); + debug("\tFormat: %d", entry.cdte_format); + debug("\tMSF: %d:%d:%d", entry.cdte_addr.msf.minute, entry.cdte_addr.msf.second, entry.cdte_addr.msf.frame); + debug("\tMode: %d\n", entry.cdte_datamode); +#endif + + _tocEntries.push_back(entry); + return true; +} + +AudioCDManager *createLinuxAudioCDManager() { + return new LinuxAudioCDManager(); +} diff --git a/backends/audiocd/linux/linux-audiocd.h b/backends/audiocd/linux/linux-audiocd.h new file mode 100644 index 0000000000..860afffa87 --- /dev/null +++ b/backends/audiocd/linux/linux-audiocd.h @@ -0,0 +1,38 @@ +/* Cabal - Legacy Game Implementations + * + * Cabal is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef BACKENDS_AUDIOCD_LINUX_H +#define BACKENDS_AUDIOCD_LINUX_H + +#ifdef USE_LINUXCD + +class AudioCDManager; + +/** + * Create an audio CD manager using the Linux CDROM API + */ +AudioCDManager *createLinuxAudioCDManager(); + +#endif + +#endif + diff --git a/backends/module.mk b/backends/module.mk index 01e601ead7..40b63e2aa4 100644 --- a/backends/module.mk +++ b/backends/module.mk @@ -129,6 +129,11 @@ MODULE_OBJS += \ events/ps3sdl/ps3sdl-events.o endif +ifdef USE_LINUXCD +MODULE_OBJS += \ + audiocd/linux/linux-audiocd.o +endif + ifeq ($(BACKEND),tizen) MODULE_OBJS += \ timer/tizen/timer.o diff --git a/backends/platform/sdl/posix/posix.cpp b/backends/platform/sdl/posix/posix.cpp index 525c74a91a..3989bd0043 100644 --- a/backends/platform/sdl/posix/posix.cpp +++ b/backends/platform/sdl/posix/posix.cpp @@ -36,6 +36,11 @@ #include "backends/fs/posix/posix-fs.h" #include "backends/taskbar/unity/unity-taskbar.h" +#ifdef USE_LINUXCD +#include "backends/audiocd/linux/linux-audiocd.h" +#endif + +#include <errno.h> #include <sys/stat.h> #include <sys/wait.h> #include <unistd.h> @@ -238,5 +243,12 @@ bool OSystem_POSIX::displayLogFile() { return WIFEXITED(status) && WEXITSTATUS(status) == 0; } +#ifdef USE_LINUXCD + +AudioCDManager *OSystem_POSIX::createAudioCDManager() { + return createLinuxAudioCDManager(); +} + +#endif #endif diff --git a/backends/platform/sdl/posix/posix.h b/backends/platform/sdl/posix/posix.h index f67515ddb3..9f69bd227f 100644 --- a/backends/platform/sdl/posix/posix.h +++ b/backends/platform/sdl/posix/posix.h @@ -59,6 +59,11 @@ protected: virtual Common::String getDefaultConfigFileName(); virtual Common::WriteStream *createLogFile(); + +#ifdef USE_LINUXCD + // Override createAudioCDManager() for Linux + virtual AudioCDManager *createAudioCDManager(); +#endif }; #endif |