tvi_v4l.c

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        }

        switch(priv->audio[i].mode)
        {
        case VIDEO_SOUND_MONO:
        case VIDEO_SOUND_LANG1:
        case VIDEO_SOUND_LANG2:
            priv->audio_channels[i] = 1;
            break;
        case VIDEO_SOUND_STEREO:
            priv->audio_channels[i] = 2;
            break;
        default:
            mp_msg(MSGT_TV, MSGL_ERR, "Card reports an unknown audio mode !\n");
            mp_msg(MSGT_TV, MSGL_ERR, "Trying two channel audio. Use forcechan to override.\n");
            priv->audio_channels[i] = 2;
            break;
        }

        if (reqmode >= 0 && priv->audio[i].mode != reqmode) {
            mp_msg(MSGT_TV, MSGL_ERR, "Audio mode setup warning!\n");
            mp_msg(MSGT_TV, MSGL_ERR, "Requested mode was %s, but v4l still reports %s.\n",
                   audio_mode2name(reqmode), audio_mode2name(priv->audio[i].mode));
            mp_msg(MSGT_TV, MSGL_ERR, "You may need \"forcechan\" option to force stereo/mono audio recording.\n");
        }

        /* display stuff */
        mp_msg(MSGT_TV, MSGL_V, "  %d: %s: ", priv->audio[i].audio,
               priv->audio[i].name);
        if (priv->audio[i].flags & VIDEO_AUDIO_MUTABLE) {
            mp_msg(MSGT_TV, MSGL_V, "muted=%s ",
                   (priv->audio[i].flags & VIDEO_AUDIO_MUTE) ? "yes" : "no");
        }
        mp_msg(MSGT_TV, MSGL_V, "vol=%d bass=%d treble=%d balance=%d mode=%s",
               priv->audio[i].volume, priv->audio[i].bass, priv->audio[i].treble,
               priv->audio[i].balance, audio_mode2name(priv->audio[i].mode));
        mp_msg(MSGT_TV, MSGL_V, " chan=%d\n", priv->audio_channels[i]);

        if (priv->tv_param->forcechan >= 0)
            priv->audio_channels[i] = priv->tv_param->forcechan;

        // we'll call VIDIOCSAUDIO again when starting capture
        // let's set audio mode to requested mode again for the case
        // when VIDIOCGAUDIO just cannot report the mode correctly
        if (reqmode >= 0) priv->audio[i].mode = reqmode;
    }
}

#if !defined(__LINUX_VIDEODEV2_H) && !defined(VIDIOC_QUERYCAP)
struct v4l2_capability
{
        __u8    driver[16];     /* i.e. "bttv" */
        __u8    card[32];       /* i.e. "Hauppauge WinTV" */
        __u8    bus_info[32];   /* "PCI:" + pci_dev->slot_name */
        __u32   version;        /* should use KERNEL_VERSION() */
        __u32   capabilities;   /* Device capabilities */
        __u32   reserved[4];
};

#define VIDIOC_QUERYCAP         _IOR  ('V',  0, struct v4l2_capability)
#endif

static int init(priv_t *priv)
{
    int i;

    if (priv->tv_param->immediate == 1)
        priv->tv_param->noaudio = 1;

    priv->video_ringbuffer = NULL;
    priv->video_timebuffer = NULL;
    priv->video_avg_buffer = NULL;
    priv->audio_ringbuffer = NULL;
    priv->audio_skew_buffer = NULL;

    priv->video_fd = open(priv->video_device, O_RDWR);
    mp_msg(MSGT_TV, MSGL_DBG2, "Video fd: %d, %p\n", priv->video_fd,
        priv->video_device);
    if (priv->video_fd == -1)
    {
        mp_msg(MSGT_TV, MSGL_ERR, "unable to open '%s': %s\n",
            priv->video_device, strerror(errno));
        goto err;
    }

    /* check for v4l2 */
    if (ioctl(priv->video_fd, VIDIOC_QUERYCAP, &priv->capability) == 0) {
        mp_msg(MSGT_TV, MSGL_ERR, "=================================================================\n");
        mp_msg(MSGT_TV, MSGL_ERR, " WARNING: YOU ARE USING V4L DEMUXER WITH V4L2 DRIVERS!!!\n");
        mp_msg(MSGT_TV, MSGL_ERR, " As the V4L1 compatibility layer is broken, this may not work.\n");
        mp_msg(MSGT_TV, MSGL_ERR, " If you encounter any problems, use driver=v4l2 instead.\n");
        mp_msg(MSGT_TV, MSGL_ERR, " Bugreports on driver=v4l with v4l2 drivers will be ignored.\n");
        mp_msg(MSGT_TV, MSGL_ERR, "=================================================================\n");
    }

    /* get capabilities (priv->capability is needed!) */
    if (ioctl(priv->video_fd, VIDIOCGCAP, &priv->capability) == -1)
    {
        mp_msg(MSGT_TV, MSGL_ERR, "ioctl get capabilites failed: %s\n", strerror(errno));
        goto err;
    }

    fcntl(priv->video_fd, F_SETFD, FD_CLOEXEC);

    mp_msg(MSGT_TV, MSGL_INFO, "Selected device: %s\n", priv->capability.name);
    mp_msg(MSGT_TV, MSGL_INFO, " Capabilites: ");
    for (i = 0; device_cap2name[i] != NULL; i++)
        if (priv->capability.type & (1 << i))
            mp_msg(MSGT_TV, MSGL_INFO, "%s ", device_cap2name[i]);
    mp_msg(MSGT_TV, MSGL_INFO, "\n");
    mp_msg(MSGT_TV, MSGL_INFO, " Device type: %d\n", priv->capability.type);
    mp_msg(MSGT_TV, MSGL_INFO, " Supported sizes: %dx%d => %dx%d\n",
        priv->capability.minwidth, priv->capability.minheight,
        priv->capability.maxwidth, priv->capability.maxheight);
    priv->width = priv->capability.minwidth;
    priv->height = priv->capability.minheight;

    /* somewhere here could disable priv->tv_param->mjpeg, if it is not a capability */

    /* initialize if necessary */
    if ( priv->tv_param->mjpeg )
    {
        struct mjpeg_params bparm;
        struct mjpeg_requestbuffers breq;          /* buffer requests */

        if (ioctl(priv->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
        {
            mp_msg(MSGT_TV, MSGL_ERR,
                   "  MJP: Error getting video parameters: %s\n", strerror(errno));
            goto err;
        }

        mp_msg(MSGT_TV, MSGL_INFO,
               "  MJP: previous params: x: %d, y: %d, w: %d, h: %d, decim: %d, fields: %d,\n",
               bparm.img_x, bparm.img_y, bparm.img_width, bparm.img_height,
               bparm.decimation, bparm.field_per_buff);

        mp_msg(MSGT_TV, MSGL_INFO,
               "  MJP: HorDcm: %d, VerDcm: %d, TmpDcm: %d\n",
               bparm.HorDcm, bparm.VerDcm, bparm.TmpDcm);

        bparm.input = priv->tv_param->input; /* tv */
        if (!strcasecmp(priv->tv_param->norm, "pal"))
            bparm.norm =  0; /* PAL */
        else if (!strcasecmp(priv->tv_param->norm, "ntsc"))
            bparm.norm =  1; /* NTSC */
        else if (!strcasecmp(priv->tv_param->norm, "secam"))
            bparm.norm =  2; /* SECAM */
        bparm.quality = priv->tv_param->quality;
        bparm.decimation = priv->tv_param->decimation;

        mp_msg(MSGT_TV, MSGL_INFO, "  MJP: setting params to decimation: %d, quality: %d\n",
               bparm.decimation, bparm.quality);

        if (ioctl(priv->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
        {
            mp_msg(MSGT_TV, MSGL_ERR,
                   "  MJP: Error setting video parameters: %s\n", strerror(errno));
            goto err;
        }

        if (ioctl(priv->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
        {
            mp_msg(MSGT_TV, MSGL_ERR,
                   "  MJP: Error getting video parameters: %s\n", strerror(errno));
            goto err;
        }

        mp_msg(MSGT_TV, MSGL_INFO,
               "  MJP: current params: x: %d, y: %d, w: %d, h: %d, decim: %d, fields: %d,\n",
               bparm.img_x, bparm.img_y, bparm.img_width, bparm.img_height,
               bparm.decimation, bparm.field_per_buff);

        mp_msg(MSGT_TV, MSGL_INFO,
               "  MJP: HorDcm: %d, VerDcm: %d, TmpDcm: %d\n",
               bparm.HorDcm, bparm.VerDcm, bparm.TmpDcm);


        breq.count = 64;
        priv -> nbuf = breq.count;
        priv->mbuf.frames = priv -> nbuf;
        priv->mjpeg_bufsize = 256*1024;
        if (priv->tv_param->buffer_size >= 0)
            priv->mjpeg_bufsize = priv->tv_param->buffer_size*1024;
        breq.size  = priv -> mjpeg_bufsize;
        if (ioctl(priv->video_fd, MJPIOC_REQBUFS,&(breq)) < 0)
        {
           mp_msg (MSGT_TV, MSGL_ERR,
              "  MJP: Error requesting video buffers: %s\n", strerror(errno));
           goto err;
        }
        mp_msg(MSGT_TV, MSGL_INFO,
               "  MJP: Got %ld buffers of size %ld KB\n",
               breq.count, breq.size/1024);

        priv -> mmap = mmap(0, breq.count * breq.size,
            PROT_READ|PROT_WRITE, MAP_SHARED, priv->video_fd, 0);
        if (priv -> mmap == MAP_FAILED)
        {
            mp_msg(MSGT_TV, MSGL_INFO,
                   "  MJP: Error mapping video buffers: %s\n", strerror(errno));
            goto err;
        }
    }

    mp_msg(MSGT_TV, MSGL_INFO, " Inputs: %d\n", priv->capability.channels);
    priv->channels = calloc(priv->capability.channels, sizeof(struct video_channel));
    if (!priv->channels)
        goto malloc_failed;
    memset(priv->channels, 0, sizeof(struct video_channel)*priv->capability.channels);
    for (i = 0; i < priv->capability.channels; i++)
    {
        priv->channels[i].channel = i;
        if (ioctl(priv->video_fd, VIDIOCGCHAN, &priv->channels[i]) == -1)
        {
            mp_msg(MSGT_TV, MSGL_ERR, "ioctl get channel failed: %s\n", strerror(errno));
            break;
        }
        mp_msg(MSGT_TV, MSGL_INFO, "  %d: %s: %s%s%s%s (tuner:%d, norm:%s)\n", i,
            priv->channels[i].name,
            (priv->channels[i].flags & VIDEO_VC_TUNER) ? "tuner " : "",
            (priv->channels[i].flags & VIDEO_VC_AUDIO) ? "audio " : "",
            (priv->channels[i].flags & VIDEO_TYPE_TV) ? "tv " : "",
            (priv->channels[i].flags & VIDEO_TYPE_CAMERA) ? "camera " : "",
            priv->channels[i].tuners,
            norm2name(priv->channels[i].norm));
    }
    priv->act_channel = 0;

    if (!(priv->capability.type & VID_TYPE_CAPTURE))
    {
        mp_msg(MSGT_TV, MSGL_ERR, "Only grabbing supported (for overlay use another program)\n");
        goto err;
    }


    /* init v4l audio even when we don't capture */
    init_v4l_audio(priv);

    if (!priv->capability.audios && !priv->tv_param->force_audio) priv->tv_param->noaudio = 1;

    /* audio init */
    if (!priv->tv_param->noaudio) {

#if defined(HAVE_ALSA9) || defined(HAVE_ALSA1X)
        if (priv->tv_param->alsa)
            audio_in_init(&priv->audio_in, AUDIO_IN_ALSA);
        else
            audio_in_init(&priv->audio_in, AUDIO_IN_OSS);
#else
        audio_in_init(&priv->audio_in, AUDIO_IN_OSS);
#endif

        if (priv->audio_device) {
            audio_in_set_device(&priv->audio_in, priv->audio_device);
        }

        if (priv->tv_param->audio_id < priv->capability.audios)
            priv->audio_id = priv->tv_param->audio_id;
        else
            priv->audio_id = 0;
        audio_in_set_samplerate(&priv->audio_in, 44100);
        if (priv->capability.audios) {
            audio_in_set_channels(&priv->audio_in, priv->audio_channels[priv->audio_id]);
        } else {
            if (priv->tv_param->forcechan >= 0) {
                audio_in_set_channels(&priv->audio_in, priv->tv_param->forcechan);
            } else {
                audio_in_set_channels(&priv->audio_in, 2);
            }
        }
        if (audio_in_setup(&priv->audio_in) < 0) return 0;
        setup_audio_buffer_sizes(priv);
    }

    return(1);

malloc_failed:
    if (priv->channels)
        free(priv->channels);
    if (priv->buf)
        free(priv->buf);
err:
    if (priv->video_fd != -1)
        close(priv->video_fd);
    return(0);
}

static int uninit(priv_t *priv)
{
    unsigned long num;

#ifdef HAVE_TV_TELETEXT
    priv->vbi_shutdown=1;
    if(priv->vbi_grabber_thread)
        pthread_join(priv->vbi_grabber_thread, NULL);

    teletext_control(priv->priv_vbi,TV_VBI_CONTROL_STOP,(void*)1);
    priv->priv_vbi=NULL;

    if(priv->vbi_fd){
        close(priv->vbi_fd);
        priv->vbi_fd=0;
    }

    if(priv->vbi_dev){
        free(priv->vbi_dev);
        priv->vbi_dev=0;
    }

#endif

    priv->shutdown = 1;

    mp_msg(MSGT_TV, MSGL_V, "Waiting for threads to finish... ");
    if (!priv->tv_param->noaudio) {
        pthread_join(priv->audio_grabber_thread, NULL);
        pthread_mutex_destroy(&priv->audio_starter);
        pthread_mutex_destroy(&priv->skew_mutex);
    }
    pthread_mutex_destroy(&priv->video_buffer_mutex);
    pthread_join(priv->video_grabber_thread, NULL);
    mp_msg(MSGT_TV, MSGL_V, "done\n");

    if (priv->capability.audios) {
        priv->audio[priv->audio_id].flags |= VIDEO_AUDIO_MUTE;
        ioctl(priv->video_fd, VIDIOCSAUDIO, &priv->audio[priv->audio_id]);
    }

    if ( priv->tv_param->mjpeg )
    {
        num = -1;
        if (ioctl(priv->video_fd, MJPIOC_QBUF_CAPT, &num) < 0)
            mp_msg(MSGT_TV, MSGL_ERR, "\n  MJP: ioctl MJPIOC_QBUF_CAPT failed: %s\n", strerror(errno));
    }
    else
    {
        // We need to munmap as close don't close mem mappings
        if(munmap(priv->mmap,priv->mbuf.size))
            mp_msg(MSGT_TV, MSGL_ERR, "Munmap failed: %s\n",strerror(errno));
    }

    if(close(priv->video_fd))
        mp_msg(MSGT_TV, MSGL_ERR, "Close tv failed: %s\n",strerror(errno));

    audio_in_uninit(&priv->audio_in);

    if (priv->video_ringbuffer) {
        int i;
        for (i = 0; i < priv->video_buffer_size_current; i++) {
            free(priv->video_ringbuffer[i]);
        }
        free(priv->video_ringbuffer);
    }

    if (priv->video_timebuffer)
        free(priv->video_timebuffer);
    if (priv->video_avg_buffer)
        free(priv->video_avg_buffer);
    if (!priv->tv_param->noaudio) {
        if (priv->audio_ringbuffer)
            free(priv->audio_ringbuffer);
        if (priv->audio_skew_buffer)
            free(priv->audio_skew_buffer);
    }

    return(1);
}

static int get_capture_buffer_size(priv_t *priv)
{
    int bufsize, cnt;

    if (priv->tv_param->buffer_size >= 0) {