diff options
Diffstat (limited to 'recordmydesktop/src/rmd_opendev.c')
| -rw-r--r-- | recordmydesktop/src/rmd_opendev.c | 265 |
1 files changed, 139 insertions, 126 deletions
diff --git a/recordmydesktop/src/rmd_opendev.c b/recordmydesktop/src/rmd_opendev.c index 51783c7..c196c5a 100644 --- a/recordmydesktop/src/rmd_opendev.c +++ b/recordmydesktop/src/rmd_opendev.c @@ -42,135 +42,148 @@ #ifdef HAVE_LIBASOUND -snd_pcm_t *rmdOpenDev(const char *pcm_dev, - unsigned int *channels, - unsigned int *frequency, - snd_pcm_uframes_t *buffsize, - 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; - - // The compiler might warn us because the expansion starts with - // assert(&hwparams) - snd_pcm_hw_params_alloca(&hwparams); - - if (snd_pcm_open(&mhandle,pcm_dev,SND_PCM_STREAM_CAPTURE,SND_PCM_ASYNC)<0){ - fprintf(stderr, "Couldn't open PCM device %s\n", pcm_dev); - return NULL; - } - else - fprintf(stderr, "Opened PCM device %s\n", pcm_dev); - 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...\n" - "Using %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; - } - - 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)){ - *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; +snd_pcm_t *rmdOpenDev( const char *pcm_dev, + unsigned int *channels, + unsigned int *frequency, + snd_pcm_uframes_t *buffsize, + 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; + + // The compiler might warn us because the expansion starts with + // assert(&hwparams) + snd_pcm_hw_params_alloca(&hwparams); + + if (snd_pcm_open(&mhandle,pcm_dev,SND_PCM_STREAM_CAPTURE,SND_PCM_ASYNC)<0) { + fprintf(stderr, "Couldn't open PCM device %s\n", pcm_dev); + return NULL; + } else + fprintf(stderr, "Opened PCM device %s\n", pcm_dev); + + 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...\n" + "Using %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; + } + + 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)) + *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; } #else -int rmdOpenDev(const char *pcm_dev, - unsigned int channels, - unsigned int frequency){ - int fd ; - fd=open(pcm_dev,O_RDONLY); - - if(fd!=-1){ - unsigned int value; - - if(ioctl(fd,SNDCTL_DSP_GETFMTS,&value)<0){ - fprintf(stderr,"Couldn't get audio format list\n"); - return -1; - } - if(value & AFMT_S16_LE){ - value=AFMT_S16_LE; - } - else if(value & AFMT_S16_BE){ - value=AFMT_S16_BE; - } - else{ - fprintf(stderr,"Soundcard doesn't support signed 16-bit-data\n"); - return -1; - } - if(ioctl(fd,SNDCTL_DSP_SETFMT,&value)<0){ - fprintf(stderr,"Couldn't set audio format\n" ); - return -1; - } - value = channels; - if(ioctl(fd,SNDCTL_DSP_CHANNELS,&value)<0){ - fprintf(stderr,"Cannot set the number of channels\n" ); - return -1; - } - value = frequency; - if(ioctl(fd,SNDCTL_DSP_SPEED,&value)<0){ - fprintf(stderr,"Couldn't set audio frequency\n" ); - return -1; - } - if(fcntl(fd,F_SETFL,fcntl(fd,F_GETFL) & ~O_NONBLOCK)<0){ - fprintf(stderr,"Couldn't set audio blocking mode\n" ); - return -1; - } - } - return fd; +int rmdOpenDev(const char *pcm_dev, unsigned int channels, unsigned int frequency) { + int fd ; + unsigned int value; + + fd=open(pcm_dev,O_RDONLY); + if (fd < 0) + return -1; + + if (ioctl(fd,SNDCTL_DSP_GETFMTS,&value)<0) { + fprintf(stderr,"Couldn't get audio format list\n"); + return -1; + } + + if (value & AFMT_S16_LE) { + value=AFMT_S16_LE; + } else if (value & AFMT_S16_BE) { + value=AFMT_S16_BE; + } else { + fprintf(stderr,"Soundcard doesn't support signed 16-bit-data\n"); + return -1; + } + + if (ioctl(fd,SNDCTL_DSP_SETFMT,&value)<0) { + fprintf(stderr,"Couldn't set audio format\n" ); + return -1; + } + + value = channels; + if (ioctl(fd,SNDCTL_DSP_CHANNELS,&value)<0) { + fprintf(stderr,"Cannot set the number of channels\n" ); + return -1; + } + + value = frequency; + if (ioctl(fd,SNDCTL_DSP_SPEED,&value)<0) { + fprintf(stderr,"Couldn't set audio frequency\n" ); + return -1; + } + + if (fcntl(fd,F_SETFL,fcntl(fd,F_GETFL) & ~O_NONBLOCK)<0) { + fprintf(stderr,"Couldn't set audio blocking mode\n" ); + return -1; + } + + return fd; } #endif |