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Viewing changes to libecasound/audioio-oss.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Junichi Uekawa
  • Date: 2008-09-26 09:58:52 UTC
  • mfrom: (1.1.6 upstream)
  • Revision ID: james.westby@ubuntu.com-20080926095852-k3v9ewhmxpaltusw
Tags: 2.5.2-3
yodl 2.13.1 removed --unique-output option. Remove --unique-output
accordingly.

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libecasound/audioio-oss.cpp
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// ------------------------------------------------------------------------
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// audioio-oss.cpp: OSS (/dev/dsp) input/output.
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// Copyright (C) 1999-2004 Kai Vehmanen
 
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// Copyright (C) 1999-2004,2008 Kai Vehmanen
 
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//
 
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// Attributes:
 
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//     eca-style-version: 3 (see Ecasound Programmer's Guide)
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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OSSDEVICE* OSSDEVICE::clone(void) const
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{
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  OSSDEVICE* target = new OSSDEVICE(label(), precise_srate_mode);
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  return(target);
 
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  return target;
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}
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void OSSDEVICE::open(void) throw(AUDIO_IO::SETUP_ERROR &)
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  if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &oss_caps) == -1) {
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    oss_caps = 0;
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    ECA_LOG_MSG(ECA_LOGGER::info, "(audioio-oss) WARNING: OSS-device doesn't support SNDCTL_DSP_GETCAPS."); 
 
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    ECA_LOG_MSG(ECA_LOGGER::info, "WARNING: OSS-device doesn't support SNDCTL_DSP_GETCAPS."); 
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  }
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  // -------------------------------------------------------------------
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    fragment_count = 3;
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  ECA_LOG_MSG(ECA_LOGGER::user_objects, 
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                "(audioio-oss) Setting OSS fragment size according to " + kvu_numtostr(buffersize()) + ".");
 
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                "Setting OSS fragment size according to " + kvu_numtostr(buffersize()) + ".");
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  // fr_size == 4  -> the minimum fragment size: 2^4 = 16 bytes
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  unsigned short int fr_size = 4;
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    ECA_LOG_MSG(ECA_LOGGER::info, "WARNING: OSS-device doesn't support SNDCTL_DSP_SETFRAGMENT!");
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  ECA_LOG_MSG(ECA_LOGGER::user_objects, 
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                "(audioio-oss) set OSS fragment size to (2^x) " +
 
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                "set OSS fragment size to (2^x) " +
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                kvu_numtostr(fr_size) + ".");
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  // -------------------------------------------------------------------
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  int t = stereo;
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  if (::ioctl(audio_fd, SNDCTL_DSP_STEREO, &t)==-1)
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    ECA_LOG_MSG(ECA_LOGGER::info, "(audioio-oss) WARNING: Error when setting sample rate."); 
 
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    ECA_LOG_MSG(ECA_LOGGER::info, "WARNING: Error when setting sample rate."); 
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  if (stereo != t)
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    throw(SETUP_ERROR(SETUP_ERROR::channels, "AUDIOIO-OSS: audio format not supported SNDCTL_DSP_STEREO"));
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      throw(SETUP_ERROR(SETUP_ERROR::unexpected, "AUDIOIO-OSS: Requested sample rate is not supported. Audio device suggests sample rate of " + kvu_numtostr(speed) + ". Disable precise-sample-rate mode to ignore the difference."));
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    }
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    else {
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      ECA_LOG_MSG(ECA_LOGGER::info, "(audioio-oss) WARNING: Requested sample rate is not supported. Ignoring the the difference between requested (" + kvu_numtostr(samples_per_second()) + ") and suggested (" + kvu_numtostr(speed) + ") sample rates."); 
 
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      ECA_LOG_MSG(ECA_LOGGER::info, "WARNING: Requested sample rate is not supported. Ignoring the the difference between requested (" + kvu_numtostr(samples_per_second()) + ") and suggested (" + kvu_numtostr(speed) + ") sample rates."); 
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    }
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  }
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  // Get fragment size.
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  if (::ioctl(audio_fd, SNDCTL_DSP_GETBLKSIZE, &fragment_size) == -1)
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      ECA_LOG_MSG(ECA_LOGGER::info, "(audioio-oss) WARNING: SNDCTL_DSP_GETBLKSIZE ioctl failed. Might affect OSS audio input/output."); 
 
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      ECA_LOG_MSG(ECA_LOGGER::info, "WARNING: SNDCTL_DSP_GETBLKSIZE ioctl failed. Might affect OSS audio input/output."); 
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  ECA_LOG_MSG(ECA_LOGGER::user_objects, "(audioio-oss) OSS set to use fragment size of " + 
 
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  ECA_LOG_MSG(ECA_LOGGER::user_objects, "OSS set to use fragment size of " + 
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                   kvu_numtostr(fragment_size) + ".");
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  /* SNDCTL_DSP_GET[IO]PTR report offset since device was opened */
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  //        won't work properly (see OSS adv.prog.guide)
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  ::ioctl(audio_fd, SNDCTL_DSP_POST, 0);
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  ECA_LOG_MSG(ECA_LOGGER::user_objects,"(audioio-oss) Audio device \"" + label() + "\" disabled.");
 
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  ECA_LOG_MSG(ECA_LOGGER::user_objects,"Audio device \"" + label() + "\" disabled.");
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  AUDIO_IO_DEVICE::stop();
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}
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void OSSDEVICE::start(void)
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{
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  ECA_LOG_MSG(ECA_LOGGER::user_objects,"(audioio-oss) Audio device \"" + label() + "\" started.");
 
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  ECA_LOG_MSG(ECA_LOGGER::user_objects,"Audio device \"" + label() + "\" started.");
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#ifndef ECA_DISABLE_OSS_TRIGGER
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  if ((oss_caps & DSP_CAP_TRIGGER) == DSP_CAP_TRIGGER) {
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    int enable_bits;
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    }
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  }
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  DBC_CHECK(delay >= 0);
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  return(delay);
 
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  return delay;
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}
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long int OSSDEVICE::read_samples(void* target_buffer, 
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                                 long int samples)
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{
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  return(::read(audio_fd,target_buffer, frame_size() * samples) / frame_size());
 
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  return ::read(audio_fd,target_buffer, frame_size() * samples) / frame_size();
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}
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void OSSDEVICE::write_samples(void* target_buffer, long int samples)