PageRenderTime 19ms CodeModel.GetById 14ms app.highlight 4ms RepoModel.GetById 1ms app.codeStats 0ms

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

https://bitbucket.org/ndreys/linux-sunxi
C | 101 lines | 63 code | 13 blank | 25 comment | 14 complexity | 483c2eb1c21e7a7a0083b90fd8c4a721 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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
 25static 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
 62static 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
 76static 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
 88static 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
 96struct 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};