diff options
Diffstat (limited to 'rMD-exp/src/opendev.c')
| -rw-r--r-- | rMD-exp/src/opendev.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/rMD-exp/src/opendev.c b/rMD-exp/src/opendev.c new file mode 100644 index 0000000..4b559ec --- /dev/null +++ b/rMD-exp/src/opendev.c @@ -0,0 +1,103 @@ +/********************************************************************************* +* recordMyDesktop * +********************************************************************************** +* * +* Copyright (C) 2006 John Varouhakis * +* * +* * +* This program is free software; you can redistribute it and/or modify * +* it under the terms of the GNU General Public License as published by * +* the Free Software Foundation; either version 2 of the License, or * +* (at your option) any later version. * +* * +* This program is distributed in the hope that it will be useful, * +* but WITHOUT ANY WARRANTY; without even the implied warranty of * +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * +* GNU General Public License for more details. * +* * +* You should have received a copy of the GNU General Public License * +* along with this program; if not, write to the Free Software * +* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * +* * +* * +* * +* For further information contact me at johnvarouhakis@gmail.com * +**********************************************************************************/ + + + + +#include <recordmydesktop.h> + + +snd_pcm_t *OpenDev(const char *pcm_dev,unsigned int *channels,unsigned int *frequency,snd_pcm_uframes_t *periodsize,unsigned int *periodtime,int *hard_pause){ + + snd_pcm_t *mhandle; + snd_pcm_hw_params_t *hwparams; + unsigned int periods=2; + unsigned int exactrate = *frequency; + + snd_pcm_hw_params_alloca(&hwparams); + snd_pcm_uframes_t buffsize=4096; + + if (snd_pcm_open(&mhandle, pcm_dev, SND_PCM_STREAM_CAPTURE, 0)<0){ + fprintf(stderr, "Couldn't open PCM device %s\n", pcm_dev); + return NULL; + } + if (snd_pcm_hw_params_any(mhandle, hwparams)<0){ + fprintf(stderr, "Couldn't configure PCM device.\n"); + return NULL; + } + if (snd_pcm_hw_params_set_access(mhandle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)<0) { + fprintf(stderr, "Couldn't set access.\n"); + return NULL; + } + if (snd_pcm_hw_params_set_format(mhandle, hwparams, SND_PCM_FORMAT_S16_LE)<0){ + fprintf(stderr, "Couldn't set format.\n"); + return NULL; + } + if (snd_pcm_hw_params_set_rate_near(mhandle, hwparams, &exactrate, 0)<0){ + fprintf(stderr, "Couldn't set frequency.\n"); + return NULL; + } + if (*frequency != exactrate){ + fprintf(stderr, "Playback frequency %dHz is not available...\nUsing %dHz instead.\n",*frequency,exactrate); + *frequency=exactrate; + } + if (snd_pcm_hw_params_set_channels_near(mhandle, hwparams, channels)<0){ + fprintf(stderr, "Couldn't set channels number.\n"); + return NULL; + } + if(*channels>2){ + fprintf(stderr,"Channels number should be 1(mono) or 2(stereo).\n"); + return NULL; + } + if (snd_pcm_hw_params_set_periods_near(mhandle, hwparams, &periods,0)<0) { + fprintf(stderr, "Couldn't set periods.\n"); + return NULL; + } + buffsize=(exactrate*(*channels))/2; + if (snd_pcm_hw_params_set_buffer_size_near(mhandle, hwparams,&buffsize)<0){ + fprintf(stderr, "Couldn't set buffer size.\n"); + return NULL; + } + if (snd_pcm_hw_params(mhandle, hwparams)<0){ + fprintf(stderr, "Couldn't set hardware parameters.\n"); + return NULL; + } + if(hard_pause!=NULL) + if(!snd_pcm_hw_params_can_pause(hwparams)){ +// fprintf(stderr, "Current sound device doesn't seem to support pausing!\nI will attempt to close/reopen device in case you opt to pause during recording.\n"); + *hard_pause=1; + } + if(periodsize!=NULL) + snd_pcm_hw_params_get_period_size(hwparams,periodsize,0); + if(periodtime!=NULL) + snd_pcm_hw_params_get_period_time(hwparams,periodtime,0); + fprintf(stderr,"Recording on device %s is set to:\n%d channels at %dHz\n",pcm_dev,*channels,*frequency); + snd_pcm_prepare(mhandle); + + return mhandle; +} + + |