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