LCOV - code coverage report
Current view: top level - libavdevice - oss_enc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 31 0.0 %
Date: 2018-04-19 23:07:36 Functions: 0 3 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Linux audio 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             : #if HAVE_UNISTD_H
      25             : #include <unistd.h>
      26             : #endif
      27             : #include <fcntl.h>
      28             : #include <sys/ioctl.h>
      29             : #include <sys/soundcard.h>
      30             : 
      31             : #include "libavutil/internal.h"
      32             : 
      33             : #include "libavcodec/avcodec.h"
      34             : 
      35             : #include "avdevice.h"
      36             : #include "libavformat/internal.h"
      37             : 
      38             : #include "oss.h"
      39             : 
      40           0 : static int audio_write_header(AVFormatContext *s1)
      41             : {
      42           0 :     OSSAudioData *s = s1->priv_data;
      43             :     AVStream *st;
      44             :     int ret;
      45             : 
      46           0 :     st = s1->streams[0];
      47           0 :     s->sample_rate = st->codecpar->sample_rate;
      48           0 :     s->channels = st->codecpar->channels;
      49           0 :     ret = ff_oss_audio_open(s1, 1, s1->url);
      50           0 :     if (ret < 0) {
      51           0 :         return AVERROR(EIO);
      52             :     } else {
      53           0 :         return 0;
      54             :     }
      55             : }
      56             : 
      57           0 : static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
      58             : {
      59           0 :     OSSAudioData *s = s1->priv_data;
      60             :     int len, ret;
      61           0 :     int size= pkt->size;
      62           0 :     uint8_t *buf= pkt->data;
      63             : 
      64           0 :     while (size > 0) {
      65           0 :         len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size);
      66           0 :         memcpy(s->buffer + s->buffer_ptr, buf, len);
      67           0 :         s->buffer_ptr += len;
      68           0 :         if (s->buffer_ptr >= OSS_AUDIO_BLOCK_SIZE) {
      69             :             for(;;) {
      70           0 :                 ret = write(s->fd, s->buffer, OSS_AUDIO_BLOCK_SIZE);
      71           0 :                 if (ret > 0)
      72           0 :                     break;
      73           0 :                 if (ret < 0 && (errno != EAGAIN && errno != EINTR))
      74           0 :                     return AVERROR(EIO);
      75             :             }
      76           0 :             s->buffer_ptr = 0;
      77             :         }
      78           0 :         buf += len;
      79           0 :         size -= len;
      80             :     }
      81           0 :     return 0;
      82             : }
      83             : 
      84           0 : static int audio_write_trailer(AVFormatContext *s1)
      85             : {
      86           0 :     OSSAudioData *s = s1->priv_data;
      87             : 
      88           0 :     ff_oss_audio_close(s);
      89           0 :     return 0;
      90             : }
      91             : 
      92             : static const AVClass oss_muxer_class = {
      93             :     .class_name     = "OSS muxer",
      94             :     .item_name      = av_default_item_name,
      95             :     .version        = LIBAVUTIL_VERSION_INT,
      96             :     .category       = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
      97             : };
      98             : 
      99             : AVOutputFormat ff_oss_muxer = {
     100             :     .name           = "oss",
     101             :     .long_name      = NULL_IF_CONFIG_SMALL("OSS (Open Sound System) playback"),
     102             :     .priv_data_size = sizeof(OSSAudioData),
     103             :     /* XXX: we make the assumption that the soundcard accepts this format */
     104             :     /* XXX: find better solution with "preinit" method, needed also in
     105             :        other formats */
     106             :     .audio_codec    = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
     107             :     .video_codec    = AV_CODEC_ID_NONE,
     108             :     .write_header   = audio_write_header,
     109             :     .write_packet   = audio_write_packet,
     110             :     .write_trailer  = audio_write_trailer,
     111             :     .flags          = AVFMT_NOFILE,
     112             :     .priv_class     = &oss_muxer_class,
     113             : };

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