diff options
Diffstat (limited to 'src/oss-util.c')
-rw-r--r-- | src/oss-util.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/oss-util.c b/src/oss-util.c index 9c4f55ca..f1e07017 100644 --- a/src/oss-util.c +++ b/src/oss-util.c @@ -4,9 +4,63 @@ #include <stdio.h> #include <errno.h> #include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> #include "oss-util.h" +int pa_oss_open(const char *device, int *mode, int* pcaps) { + int fd = -1; + assert(device && mode && (*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY)); + + if (*mode == O_RDWR) { + if ((fd = open(device, O_RDWR|O_NDELAY)) >= 0) { + int dcaps, *tcaps; + ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0); + + tcaps = pcaps ? pcaps : &dcaps; + + if (ioctl(fd, SNDCTL_DSP_GETCAPS, tcaps) < 0) { + fprintf(stderr, __FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno)); + goto fail; + } + + if (*tcaps & DSP_CAP_DUPLEX) + return fd; + + close(fd); + } + + if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY)) < 0) { + if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY)) < 0) { + fprintf(stderr, __FILE__": open('%s'): %s\n", device, strerror(errno)); + goto fail; + } + } + } else { + if ((fd = open(device, *mode|O_NDELAY)) < 0) { + fprintf(stderr, __FILE__": open('%s'): %s\n", device, strerror(errno)); + goto fail; + } + } + + if (pcaps) { + if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) { + fprintf(stderr, "SNDCTL_DSP_GETCAPS: %s\n", strerror(errno)); + goto fail; + } + } + + return fd; + +fail: + if (fd >= 0) + close(fd); + return fd; +} + int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) { int format, channels, speed; |