diff options
Diffstat (limited to 'src/audioOutputs/audioOutput_fifo.c')
| -rw-r--r-- | src/audioOutputs/audioOutput_fifo.c | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/src/audioOutputs/audioOutput_fifo.c b/src/audioOutputs/audioOutput_fifo.c deleted file mode 100644 index d77e7e81c..000000000 --- a/src/audioOutputs/audioOutput_fifo.c +++ /dev/null @@ -1,251 +0,0 @@ -/* the Music Player Daemon (MPD) - * (c)2003-2006 by Warren Dukes (warren.dukes@gmail.com) - * This project's homepage is: http://www.musicpd.org - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "../audioOutput.h" - -#include <stdlib.h> - -#ifdef HAVE_FIFO - -#include "../conf.h" -#include "../log.h" - -#include <errno.h> -#include <fcntl.h> -#include <string.h> -#include <unistd.h> -#include <sys/stat.h> - -#define FIFO_BUFFER_SIZE 65536 /* pipe capacity on Linux >= 2.6.11 */ - -typedef struct _FifoData { - char *path; - int input; - int output; - int created; -} FifoData; - -static FifoData *newFifoData() -{ - FifoData *ret; - - ret = malloc(sizeof(FifoData)); - - ret->path = NULL; - ret->input = -1; - ret->output = -1; - ret->created = 0; - - return ret; -} - -static void freeFifoData(FifoData *fd) -{ - if (fd->path) free(fd->path); - free(fd); -} - -static int makeFifo(FifoData *fd) -{ - if (mkfifo(fd->path, 0666) < 0) { - ERROR("Couldn't create FIFO \"%s\": %s\n", fd->path, - strerror(errno)); - return -1; - } - - fd->created = 1; - - return 0; -} - -static int checkFifo(FifoData *fd) -{ - struct stat st; - - if (stat(fd->path, &st) < 0) { - if (errno == ENOENT) { - /* Path doesn't exist */ - return makeFifo(fd); - } - - ERROR("Failed to stat FIFO \"%s\": %s\n", fd->path, - strerror(errno)); - return -1; - } - - if (!S_ISFIFO(st.st_mode)) { - ERROR("\"%s\" already exists, but is not a FIFO\n", fd->path); - return -1; - } - - return 0; -} - -static int openFifo(FifoData *fd) -{ - if (checkFifo(fd) < 0) return -1; - - fd->input = open(fd->path, O_RDONLY|O_NONBLOCK); - if (fd->input < 0) { - ERROR("Could not open FIFO \"%s\" for reading: %s\n", fd->path, - strerror(errno)); - return -1; - } - - fd->output = open(fd->path, O_WRONLY|O_NONBLOCK); - if (fd->output < 0) { - ERROR("Could not open FIFO \"%s\" for writing: %s\n", fd->path, - strerror(errno)); - return -1; - } - - return 0; -} - -static void removeFifo(FifoData *fd) -{ - DEBUG("Removing FIFO \"%s\"\n", fd->path); - if (unlink(fd->path) < 0) { - ERROR("Could not remove FIFO \"%s\": %s\n", fd->path, - strerror(errno)); - return; - } - - fd->created = 0; -} - -static void closeFifo(FifoData *fd) -{ - struct stat st; - - if (fd->input >= 0) close(fd->input); - if (fd->output >= 0) close(fd->output); - if (fd->created && (stat(fd->path, &st) == 0)) removeFifo(fd); -} - -static int fifo_initDriver(AudioOutput *audioOutput, ConfigParam *param) -{ - BlockParam *path = NULL; - FifoData *fd; - - if (param) path = getBlockParam(param, "path"); - - if (!path) { - ERROR("No \"path\" parameter specified for fifo output " - "defined at line %i\n", param->line); - exit(EXIT_FAILURE); - } - - if (path->value[0] != '/') { - ERROR("\"path\" parameter for fifo output is not an absolute " - "path at line %i\n", param->line); - exit(EXIT_FAILURE); - } - - fd = newFifoData(); - fd->path = strdup(path->value); - audioOutput->data = fd; - - if (openFifo(fd) < 0) { - freeFifoData(fd); - return -1; - } - - return 0; -} - -static void fifo_finishDriver(AudioOutput *audioOutput) -{ - FifoData *fd; - - fd = audioOutput->data; - closeFifo(fd); - freeFifoData(fd); -} - -static int fifo_openDevice(AudioOutput *audioOutput) -{ - audioOutput->open = 1; - return 0; -} - -static void fifo_dropBufferedAudio(AudioOutput *audioOutput) -{ - FifoData *fd; - char buf[FIFO_BUFFER_SIZE]; - int bytes = 1; - - fd = audioOutput->data; - - while (bytes > 0) bytes = read(fd->input, buf, FIFO_BUFFER_SIZE); - if (bytes < 0 && errno != EAGAIN) { - WARNING("Flush of FIFO \"%s\" failed: %s\n", fd->path, - strerror(errno)); - } -} - -static void fifo_closeDevice(AudioOutput *audioOutput) -{ - audioOutput->open = 0; -} - -static int fifo_playAudio(AudioOutput *audioOutput, char *playChunk, int size) -{ - FifoData *fd; - int bytes; - int offset = 0; - - fd = audioOutput->data; - - while (1) { - bytes = write(fd->output, &playChunk[offset], size); - if (bytes < 0 && errno == EAGAIN) { - fifo_dropBufferedAudio(audioOutput); - } else if (bytes < 0) { - ERROR("Closing FIFO output \"%s\" due to write error: " - "%s\n", fd->path, strerror(errno)); - fifo_closeDevice(audioOutput); - return -1; - } else if (bytes < size) { - size -= bytes; - offset += bytes; - } else { - break; - } - } - - return 0; -} - -AudioOutputPlugin fifoPlugin = { - "fifo", - NULL, /* testDefaultDeviceFunc */ - fifo_initDriver, - fifo_finishDriver, - fifo_openDevice, - fifo_playAudio, - fifo_dropBufferedAudio, - fifo_closeDevice, - NULL, /* sendMetadataFunc */ -}; - -#else /* HAVE_FIFO */ - -DISABLED_AUDIO_OUTPUT_PLUGIN(fifoPlugin) - -#endif /* HAVE_FIFO */ |