/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
- /*
- ioctl control functions
- Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
- Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
- 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"
- 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,
- };