drivers/media/video/ivtv/ivtv-controls.c

   1 /*
   2     ioctl control functions
   3     Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
   4     Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "ivtv-driver.h"
  22 #include "ivtv-ioctl.h"
  23 #include "ivtv-controls.h"
  24
  25 static int ivtv_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
  26 {
  27         struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
  28
  29         /* First try to allocate sliced VBI buffers if needed. */
  30         if (fmt && itv->vbi.sliced_mpeg_data[0] == NULL) {
  31                 int i;
  32
  33                 for (i = 0; i < IVTV_VBI_FRAMES; i++) {
  34                         /* Yuck, hardcoded. Needs to be a define */
  35                         itv->vbi.sliced_mpeg_data[i] = kmalloc(2049, GFP_KERNEL);
  36                         if (itv->vbi.sliced_mpeg_data[i] == NULL) {
  37                                 while (--i >= 0) {
  38                                         kfree(itv->vbi.sliced_mpeg_data[i]);
  39                                         itv->vbi.sliced_mpeg_data[i] = NULL;
  40                                 }
  41                                 return -ENOMEM;
  42                         }
  43                 }
  44         }
  45
  46         itv->vbi.insert_mpeg = fmt;
  47
  48         if (itv->vbi.insert_mpeg == 0) {
  49                 return 0;
  50         }
  51         /* Need sliced data for mpeg insertion */
  52         if (ivtv_get_service_set(itv->vbi.sliced_in) == 0) {
  53                 if (itv->is_60hz)
  54                         itv->vbi.sliced_in->service_set = V4L2_SLICED_CAPTION_525;
  55                 else
  56                         itv->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
  57                 ivtv_expand_service_set(itv->vbi.sliced_in, itv->is_50hz);
  58         }
  59         return 0;
  60 }
  61
  62 static int ivtv_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
  63 {
  64         struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
  65         int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
  66         struct v4l2_mbus_framefmt fmt;
  67
  68         /* fix videodecoder resolution */
  69         fmt.width = cxhdl->width / (is_mpeg1 ? 2 : 1);
  70         fmt.height = cxhdl->height;
  71         fmt.code = V4L2_MBUS_FMT_FIXED;
  72         v4l2_subdev_call(itv->sd_video, video, s_mbus_fmt, &fmt);
  73         return 0;
  74 }
  75
  76 static int ivtv_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
  77 {
  78         static const u32 freqs[3] = { 44100, 48000, 32000 };
  79         struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
  80
  81         /* The audio clock of the digitizer must match the codec sample
  82            rate otherwise you get some very strange effects. */
  83         if (idx < ARRAY_SIZE(freqs))
  84                 ivtv_call_all(itv, audio, s_clock_freq, freqs[idx]);
  85         return 0;
  86 }
  87
  88 static int ivtv_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
  89 {
  90         struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
  91
  92         itv->dualwatch_stereo_mode = val;
  93         return 0;
  94 }
  95
  96 struct cx2341x_handler_ops ivtv_cxhdl_ops = {
  97         .s_audio_mode = ivtv_s_audio_mode,
  98         .s_audio_sampling_freq = ivtv_s_audio_sampling_freq,
  99         .s_video_encoding = ivtv_s_video_encoding,
 100         .s_stream_vbi_fmt = ivtv_s_stream_vbi_fmt,
 101 };