int audio_in_set_channels(audio_in_t *ai, int channels) { switch (ai->type) { #ifdef CONFIG_ALSA case AUDIO_IN_ALSA: ai->req_channels = channels; if (!ai->setup) return 0; if (ai_alsa_setup(ai) < 0) return -1; return ai->channels; #endif #ifdef CONFIG_OSS_AUDIO case AUDIO_IN_OSS: ai->req_channels = channels; if (!ai->setup) return 0; if (ai_oss_set_channels(ai) < 0) return -1; return ai->channels; #endif default: return -1; } }
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; }
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_tmsg(MSGT_TV, MSGL_ERR, "Unable to open '%s': %s\n", 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_tmsg(MSGT_TV, MSGL_ERR, "unsupported format\n"); 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_tmsg(MSGT_TV, MSGL_ERR, "Unable to set audio format."); 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_tmsg(MSGT_TV, MSGL_ERR, "Unable to set samplerate: %d\n", 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_tmsg(MSGT_TV, MSGL_ERR, "Unable to set trigger: %d\n", 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_tmsg(MSGT_TV, MSGL_ERR, "Unable to get block size!\n"); } 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_tmsg(MSGT_TV, MSGL_ERR, "Audio block size is zero, setting to %d!\n", ai->blocksize); } else if (ai->blocksize < 4096*ai->channels*2) { ai->blocksize *= 4096*ai->channels*2/ai->blocksize; mp_tmsg(MSGT_TV, MSGL_ERR, "Audio block size too low, setting to %d!\n", ai->blocksize); } ai->samplesize = 16; ai->bytes_per_sample = 2; return 0; }