ivtv-controls.c

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/*
    ioctl control functions
    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
    Copyright (C) 2005-2007  Hans Verkuil <[email protected]>

    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
 */

#include "ivtv-driver.h"
#include "ivtv-ioctl.h"
#include "ivtv-controls.h"
#include "ivtv-mailbox.h"

static int ivtv_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
{
    struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);

    /* First try to allocate sliced VBI buffers if needed. */
    if (fmt && itv->vbi.sliced_mpeg_data[0] == NULL) {
        int i;

        for (i = 0; i < IVTV_VBI_FRAMES; i++) {
            /* Yuck, hardcoded. Needs to be a define */
            itv->vbi.sliced_mpeg_data[i] = kmalloc(2049, GFP_KERNEL);
            if (itv->vbi.sliced_mpeg_data[i] == NULL) {
                while (--i >= 0) {
                    kfree(itv->vbi.sliced_mpeg_data[i]);
                    itv->vbi.sliced_mpeg_data[i] = NULL;
                }
                return -ENOMEM;
            }
        }
    }

    itv->vbi.insert_mpeg = fmt;

    if (itv->vbi.insert_mpeg == 0) {
        return 0;
    }
    /* Need sliced data for mpeg insertion */
    if (ivtv_get_service_set(itv->vbi.sliced_in) == 0) {
        if (itv->is_60hz)
            itv->vbi.sliced_in->service_set = V4L2_SLICED_CAPTION_525;
        else
            itv->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
        ivtv_expand_service_set(itv->vbi.sliced_in, itv->is_50hz);
    }
    return 0;
}

static int ivtv_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
{
    struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
    int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
    struct v4l2_mbus_framefmt fmt;

    /* fix videodecoder resolution */
    fmt.width = cxhdl->width / (is_mpeg1 ? 2 : 1);
    fmt.height = cxhdl->height;
    fmt.code = V4L2_MBUS_FMT_FIXED;
    v4l2_subdev_call(itv->sd_video, video, s_mbus_fmt, &fmt);
    return 0;
}

static int ivtv_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
{
    static const u32 freqs[3] = { 44100, 48000, 32000 };
    struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);

    /* The audio clock of the digitizer must match the codec sample
       rate otherwise you get some very strange effects. */
    if (idx < ARRAY_SIZE(freqs))
        ivtv_call_all(itv, audio, s_clock_freq, freqs[idx]);
    return 0;
}

static int ivtv_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
{
    struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);

    itv->dualwatch_stereo_mode = val;
    return 0;
}

struct cx2341x_handler_ops ivtv_cxhdl_ops = {
    .s_audio_mode = ivtv_s_audio_mode,
    .s_audio_sampling_freq = ivtv_s_audio_sampling_freq,
    .s_video_encoding = ivtv_s_video_encoding,
    .s_stream_vbi_fmt = ivtv_s_stream_vbi_fmt,
};

int ivtv_g_pts_frame(struct ivtv *itv, s64 *pts, s64 *frame)
{
    u32 data[CX2341X_MBOX_MAX_DATA];

    if (test_bit(IVTV_F_I_VALID_DEC_TIMINGS, &itv->i_flags)) {
        *pts = (s64)((u64)itv->last_dec_timing[2] << 32) |
            (u64)itv->last_dec_timing[1];
        *frame = itv->last_dec_timing[0];
        return 0;
    }
    *pts = 0;
    *frame = 0;
    if (atomic_read(&itv->decoding)) {
        if (ivtv_api(itv, CX2341X_DEC_GET_TIMING_INFO, 5, data)) {
            IVTV_DEBUG_WARN("GET_TIMING: couldn't read clock\n");
            return -EIO;
        }
        memcpy(itv->last_dec_timing, data, sizeof(itv->last_dec_timing));
        set_bit(IVTV_F_I_VALID_DEC_TIMINGS, &itv->i_flags);
        *pts = (s64)((u64) data[2] << 32) | (u64) data[1];
        *frame = data[0];
        /*timing->scr = (u64) (((u64) data[4] << 32) | (u64) (data[3]));*/
    }
    return 0;
}

static int ivtv_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
    struct ivtv *itv = container_of(ctrl->handler, struct ivtv, cxhdl.hdl);

    switch (ctrl->id) {
    /* V4L2_CID_MPEG_VIDEO_DEC_PTS and V4L2_CID_MPEG_VIDEO_DEC_FRAME
       control cluster */
    case V4L2_CID_MPEG_VIDEO_DEC_PTS:
        return ivtv_g_pts_frame(itv, &itv->ctrl_pts->val64,
                         &itv->ctrl_frame->val64);
    }
    return 0;
}

static int ivtv_s_ctrl(struct v4l2_ctrl *ctrl)
{
    struct ivtv *itv = container_of(ctrl->handler, struct ivtv, cxhdl.hdl);

    switch (ctrl->id) {
    /* V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK and MULTILINGUAL_PLAYBACK
       control cluster */
    case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
        itv->audio_stereo_mode = itv->ctrl_audio_playback->val - 1;
        itv->audio_bilingual_mode = itv->ctrl_audio_multilingual_playback->val - 1;
        ivtv_vapi(itv, CX2341X_DEC_SET_AUDIO_MODE, 2, itv->audio_bilingual_mode, itv->audio_stereo_mode);
        break;
    }
    return 0;
}

const struct v4l2_ctrl_ops ivtv_hdl_out_ops = {
    .s_ctrl = ivtv_s_ctrl,
    .g_volatile_ctrl = ivtv_g_volatile_ctrl,
};