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author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-08-21 22:50:40 +0000 |
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committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-08-21 22:50:40 +0000 |
commit | 6c724895d6e36eaa749798efdeb826061ed03022 (patch) | |
tree | 7d61d28a4af232ed3ecd401efe3c349c9119a8d5 /libmpdemux/ai_oss.c | |
parent | 5a92702245bfbcaec3c013ff6512aa2e5641cbd7 (diff) | |
download | mpv-6c724895d6e36eaa749798efdeb826061ed03022.tar.bz2 mpv-6c724895d6e36eaa749798efdeb826061ed03022.tar.xz |
new v4l capture patch by Jindrich Makovicka <makovick@kmlinux.fjfi.cvut.cz>:
- multithreaded audio/video buffering (I know mplayer crew hates threads
but it seems to me as the only way of doing reliable a/v capture)
- a/v timebase synchronization (sample count vs. gettimeofday)
- "immediate" mode support for mplayer
- fixed colorspace stuff - RGB?? and YUY2 modes now work as expected
- native ALSA audio capture
- separated audio input layer
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7061 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpdemux/ai_oss.c')
-rw-r--r-- | libmpdemux/ai_oss.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/libmpdemux/ai_oss.c b/libmpdemux/ai_oss.c new file mode 100644 index 0000000000..54cf50b643 --- /dev/null +++ b/libmpdemux/ai_oss.c @@ -0,0 +1,123 @@ +#include "config.h" +#include <linux/soundcard.h> +#include <fcntl.h> +#include <errno.h> + +#include "audio_in.h" +#include "mp_msg.h" + +int ai_oss_set_samplerate(audio_in_t *ai) +{ + int tmp = ai->req_samplerate; + if (ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &tmp) == -1) return -1; + ai->samplerate = ai->req_samplerate; + return 0; +} + +int ai_oss_set_channels(audio_in_t *ai) +{ + int err; + int ioctl_param; + + if (ai->req_channels > 2) + { + ioctl_param = ai->req_channels; + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp channels: %d\n", + err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_CHANNELS, &ioctl_param)); + if (err < 0) { + mp_msg(MSGT_TV, MSGL_ERR, "Unable to set channel count: %d\n", + ai->req_channels); + return -1; + } + } + else + { + ioctl_param = (ai->req_channels == 2); + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp stereo: %d (req: %d)\n", + err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_STEREO, &ioctl_param), + ioctl_param); + if (err < 0) { + mp_msg(MSGT_TV, MSGL_ERR, "Unable to set stereo: %d\n", + ai->req_channels == 2); + return -1; + } + } + ai->channels = ai->req_channels; + return 0; +} + +int ai_oss_init(audio_in_t *ai) +{ + int err; + int ioctl_param; + + ai->oss.audio_fd = open(ai->oss.device, O_RDONLY); + if (ai->oss.audio_fd < 0) + { + mp_msg(MSGT_TV, MSGL_ERR, "unable to open '%s': %s\n", + ai->oss.device, strerror(errno)); + return -1; + } + + ioctl_param = 0 ; + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n", + ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param)); + + mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param); + if (!(ioctl_param & AFMT_S16_LE)) + mp_msg(MSGT_TV, MSGL_ERR, "notsupported format\n"); + + ioctl_param = AFMT_S16_LE; + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n", + err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param)); + if (err < 0) { + mp_msg(MSGT_TV, MSGL_ERR, "Unable to set audio format."); + return -1; + } + + if (ai_oss_set_channels(ai) < 0) return -1; + + ioctl_param = ai->req_samplerate; + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n", + err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param)); + if (err < 0) { + mp_msg(MSGT_TV, MSGL_ERR, "Unable to set samplerate: %d\n", + ai->req_samplerate); + return -1; + } + ai->samplerate = ai->req_samplerate; + + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n", + ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param)); + mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param); + ioctl_param = PCM_ENABLE_INPUT; + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n", + err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param)); + if (err < 0) { + mp_msg(MSGT_TV, MSGL_ERR, "Unable to set trigger: %d\n", + PCM_ENABLE_INPUT); + return -1; + } + + ai->blocksize = 0; + mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n", + err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize)); + if (err < 0) { + mp_msg(MSGT_TV, MSGL_ERR, "Unable to get block size!\n"); + } + mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize); + + // correct the blocksize to a reasonable value + if (ai->blocksize <= 0) { + ai->blocksize = 4096*ai->channels*2; + mp_msg(MSGT_TV, MSGL_ERR, "audio block size is zero, setting to %d!\n", ai->blocksize); + } else if (ai->blocksize < 4096*ai->channels*2) { + ai->blocksize *= 4096*ai->channels*2/ai->blocksize; + mp_msg(MSGT_TV, MSGL_ERR, "audio block size too low, setting to %d!\n", ai->blocksize); + } + + ai->samplesize = 16; + ai->bytes_per_sample = 2; + + return 0; +} |