#include <stdio.h> #include <stdlib.h> #include "config.h" #include <string.h> /* strerror */ #include <fcntl.h> #include <errno.h> #include <sys/ioctl.h> #ifdef HAVE_SYS_SOUNDCARD_H #include <sys/soundcard.h> #else #ifdef HAVE_SOUNDCARD_H #include <soundcard.h> #else #include <linux/soundcard.h> #endif #endif #include "audio_in.h" #include "mp_msg.h" #include "help_mp.h" int ai_oss_set_samplerate(audio_in_t *ai) { int tmp = ai->req_samplerate; if (ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &tmp) == -1) return -1; ai->samplerate = tmp; return 0; } int ai_oss_set_channels(audio_in_t *ai) { int err; int ioctl_param; if (ai->req_channels > 2) { ioctl_param = ai->req_channels; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp channels: %d\n", err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_CHANNELS, &ioctl_param)); if (err < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetChanCount, ai->req_channels); return -1; } ai->channels = ioctl_param; } else { ioctl_param = (ai->req_channels == 2); mp_msg(MSGT_TV, MSGL_V, "ioctl dsp stereo: %d (req: %d)\n", err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_STEREO, &ioctl_param), ioctl_param); if (err < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetStereo, ai->req_channels == 2); return -1; } ai->channels = ioctl_param ? 2 : 1; } return 0; } int ai_oss_init(audio_in_t *ai) { int err; int ioctl_param; ai->oss.audio_fd = open(ai->oss.device, O_RDONLY); if (ai->oss.audio_fd < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2Open, ai->oss.device, strerror(errno)); return -1; } ioctl_param = 0 ; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n", ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param)); mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param); if (!(ioctl_param & AFMT_S16_LE)) mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_UnsupportedFmt); ioctl_param = AFMT_S16_LE; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n", err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param)); if (err < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetAudioFmt); return -1; } if (ai_oss_set_channels(ai) < 0) return -1; ioctl_param = ai->req_samplerate; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n", err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param)); if (err < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetSamplerate, ai->req_samplerate); return -1; } ai->samplerate = ioctl_param; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n", ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param)); mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param); ioctl_param = PCM_ENABLE_INPUT; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n", err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param)); if (err < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetTrigger, PCM_ENABLE_INPUT); } ai->blocksize = 0; mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n", err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize)); if (err < 0) { mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2GetBlockSize); } mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize); // correct the blocksize to a reasonable value if (ai->blocksize <= 0) { ai->blocksize = 4096*ai->channels*2; mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSizeZero, ai->blocksize); } else if (ai->blocksize < 4096*ai->channels*2) { ai->blocksize *= 4096*ai->channels*2/ai->blocksize; mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSize2Low, ai->blocksize); } ai->samplesize = 16; ai->bytes_per_sample = 2; return 0; }