mirror of https://gitee.com/openkylin/linux.git
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/*
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ioctl control functions
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Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
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Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ivtv-driver.h"
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#include "ivtv-ioctl.h"
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#include "ivtv-controls.h"
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static int ivtv_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
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{
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struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
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/* First try to allocate sliced VBI buffers if needed. */
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if (fmt && itv->vbi.sliced_mpeg_data[0] == NULL) {
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int i;
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for (i = 0; i < IVTV_VBI_FRAMES; i++) {
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/* Yuck, hardcoded. Needs to be a define */
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itv->vbi.sliced_mpeg_data[i] = kmalloc(2049, GFP_KERNEL);
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if (itv->vbi.sliced_mpeg_data[i] == NULL) {
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while (--i >= 0) {
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kfree(itv->vbi.sliced_mpeg_data[i]);
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itv->vbi.sliced_mpeg_data[i] = NULL;
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}
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return -ENOMEM;
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}
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}
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}
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itv->vbi.insert_mpeg = fmt;
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if (itv->vbi.insert_mpeg == 0) {
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return 0;
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}
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/* Need sliced data for mpeg insertion */
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if (ivtv_get_service_set(itv->vbi.sliced_in) == 0) {
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if (itv->is_60hz)
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itv->vbi.sliced_in->service_set = V4L2_SLICED_CAPTION_525;
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else
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itv->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
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ivtv_expand_service_set(itv->vbi.sliced_in, itv->is_50hz);
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}
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return 0;
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}
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static int ivtv_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
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{
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struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
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int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
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struct v4l2_mbus_framefmt fmt;
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/* fix videodecoder resolution */
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fmt.width = cxhdl->width / (is_mpeg1 ? 2 : 1);
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fmt.height = cxhdl->height;
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fmt.code = V4L2_MBUS_FMT_FIXED;
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v4l2_subdev_call(itv->sd_video, video, s_mbus_fmt, &fmt);
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return 0;
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}
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static int ivtv_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
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{
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static const u32 freqs[3] = { 44100, 48000, 32000 };
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struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
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/* The audio clock of the digitizer must match the codec sample
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rate otherwise you get some very strange effects. */
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if (idx < ARRAY_SIZE(freqs))
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ivtv_call_all(itv, audio, s_clock_freq, freqs[idx]);
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return 0;
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}
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static int ivtv_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
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{
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struct ivtv *itv = container_of(cxhdl, struct ivtv, cxhdl);
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itv->dualwatch_stereo_mode = val;
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return 0;
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}
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struct cx2341x_handler_ops ivtv_cxhdl_ops = {
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.s_audio_mode = ivtv_s_audio_mode,
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.s_audio_sampling_freq = ivtv_s_audio_sampling_freq,
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.s_video_encoding = ivtv_s_video_encoding,
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.s_stream_vbi_fmt = ivtv_s_stream_vbi_fmt,
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};
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