LCOV - code coverage report
Current view: top level - libavdevice - oss.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 51 0.0 %
Date: 2018-05-20 11:54:08 Functions: 0 2 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Linux audio play and grab interface
       3             :  * Copyright (c) 2000, 2001 Fabrice Bellard
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "config.h"
      23             : 
      24             : #include <string.h>
      25             : 
      26             : #if HAVE_UNISTD_H
      27             : #include <unistd.h>
      28             : #endif
      29             : #include <fcntl.h>
      30             : #include <sys/ioctl.h>
      31             : #include <sys/soundcard.h>
      32             : 
      33             : #include "libavutil/log.h"
      34             : 
      35             : #include "libavcodec/avcodec.h"
      36             : #include "avdevice.h"
      37             : 
      38             : #include "oss.h"
      39             : 
      40           0 : int ff_oss_audio_open(AVFormatContext *s1, int is_output,
      41             :                       const char *audio_device)
      42             : {
      43           0 :     OSSAudioData *s = s1->priv_data;
      44             :     int audio_fd;
      45             :     int tmp, err;
      46           0 :     char *flip = getenv("AUDIO_FLIP_LEFT");
      47             : 
      48           0 :     if (is_output)
      49           0 :         audio_fd = avpriv_open(audio_device, O_WRONLY);
      50             :     else
      51           0 :         audio_fd = avpriv_open(audio_device, O_RDONLY);
      52           0 :     if (audio_fd < 0) {
      53           0 :         av_log(s1, AV_LOG_ERROR, "%s: %s\n", audio_device, av_err2str(AVERROR(errno)));
      54           0 :         return AVERROR(EIO);
      55             :     }
      56             : 
      57           0 :     if (flip && *flip == '1') {
      58           0 :         s->flip_left = 1;
      59             :     }
      60             : 
      61             :     /* non blocking mode */
      62           0 :     if (!is_output) {
      63           0 :         if (fcntl(audio_fd, F_SETFL, O_NONBLOCK) < 0) {
      64           0 :             av_log(s1, AV_LOG_WARNING, "%s: Could not enable non block mode (%s)\n", audio_device, av_err2str(AVERROR(errno)));
      65             :         }
      66             :     }
      67             : 
      68           0 :     s->frame_size = OSS_AUDIO_BLOCK_SIZE;
      69             : 
      70             : #define CHECK_IOCTL_ERROR(event)                                              \
      71             :     if (err < 0) {                                                            \
      72             :         av_log(s1, AV_LOG_ERROR, #event ": %s\n", av_err2str(AVERROR(errno)));\
      73             :         goto fail;                                                            \
      74             :     }
      75             : 
      76             :     /* select format : favour native format
      77             :      * We don't CHECK_IOCTL_ERROR here because even if failed OSS still may be
      78             :      * usable. If OSS is not usable the SNDCTL_DSP_SETFMTS later is going to
      79             :      * fail anyway. */
      80           0 :     err = ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &tmp);
      81           0 :     if (err < 0) {
      82           0 :         av_log(s1, AV_LOG_WARNING, "SNDCTL_DSP_GETFMTS: %s\n", av_err2str(AVERROR(errno)));
      83             :     }
      84             : 
      85             : #if HAVE_BIGENDIAN
      86             :     if (tmp & AFMT_S16_BE) {
      87             :         tmp = AFMT_S16_BE;
      88             :     } else if (tmp & AFMT_S16_LE) {
      89             :         tmp = AFMT_S16_LE;
      90             :     } else {
      91             :         tmp = 0;
      92             :     }
      93             : #else
      94           0 :     if (tmp & AFMT_S16_LE) {
      95           0 :         tmp = AFMT_S16_LE;
      96           0 :     } else if (tmp & AFMT_S16_BE) {
      97           0 :         tmp = AFMT_S16_BE;
      98             :     } else {
      99           0 :         tmp = 0;
     100             :     }
     101             : #endif
     102             : 
     103           0 :     switch(tmp) {
     104           0 :     case AFMT_S16_LE:
     105           0 :         s->codec_id = AV_CODEC_ID_PCM_S16LE;
     106           0 :         break;
     107           0 :     case AFMT_S16_BE:
     108           0 :         s->codec_id = AV_CODEC_ID_PCM_S16BE;
     109           0 :         break;
     110           0 :     default:
     111           0 :         av_log(s1, AV_LOG_ERROR, "Soundcard does not support 16 bit sample format\n");
     112           0 :         close(audio_fd);
     113           0 :         return AVERROR(EIO);
     114             :     }
     115           0 :     err=ioctl(audio_fd, SNDCTL_DSP_SETFMT, &tmp);
     116           0 :     CHECK_IOCTL_ERROR(SNDCTL_DSP_SETFMTS)
     117             : 
     118           0 :     tmp = (s->channels == 2);
     119           0 :     err = ioctl(audio_fd, SNDCTL_DSP_STEREO, &tmp);
     120           0 :     CHECK_IOCTL_ERROR(SNDCTL_DSP_STEREO)
     121             : 
     122           0 :     tmp = s->sample_rate;
     123           0 :     err = ioctl(audio_fd, SNDCTL_DSP_SPEED, &tmp);
     124           0 :     CHECK_IOCTL_ERROR(SNDCTL_DSP_SPEED)
     125           0 :     s->sample_rate = tmp; /* store real sample rate */
     126           0 :     s->fd = audio_fd;
     127             : 
     128           0 :     return 0;
     129           0 :  fail:
     130           0 :     close(audio_fd);
     131           0 :     return AVERROR(EIO);
     132             : #undef CHECK_IOCTL_ERROR
     133             : }
     134             : 
     135           0 : int ff_oss_audio_close(OSSAudioData *s)
     136             : {
     137           0 :     close(s->fd);
     138           0 :     return 0;
     139             : }

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