mirror of https://gitee.com/openkylin/linux.git
132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/*
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* cx18 ioctl control functions
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*
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* Derived from ivtv-controls.c
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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*
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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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*
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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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*
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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
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* 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include "cx18-driver.h"
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#include "cx18-cards.h"
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#include "cx18-ioctl.h"
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#include "cx18-audio.h"
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#include "cx18-mailbox.h"
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#include "cx18-controls.h"
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static int cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
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{
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struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
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int type = cxhdl->stream_type->val;
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if (atomic_read(&cx->ana_capturing) > 0)
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return -EBUSY;
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if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
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!(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
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type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
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type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) {
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/* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
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cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
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CX18_DEBUG_INFO("disabled insertion of sliced VBI data into "
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"the MPEG stream\n");
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return 0;
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}
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/* Allocate sliced VBI buffers if needed. */
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if (cx->vbi.sliced_mpeg_data[0] == NULL) {
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int i;
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for (i = 0; i < CX18_VBI_FRAMES; i++) {
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cx->vbi.sliced_mpeg_data[i] =
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kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
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if (cx->vbi.sliced_mpeg_data[i] == NULL) {
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while (--i >= 0) {
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kfree(cx->vbi.sliced_mpeg_data[i]);
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cx->vbi.sliced_mpeg_data[i] = NULL;
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}
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cx->vbi.insert_mpeg =
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V4L2_MPEG_STREAM_VBI_FMT_NONE;
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CX18_WARN("Unable to allocate buffers for "
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"sliced VBI data insertion\n");
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return -ENOMEM;
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}
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}
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}
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cx->vbi.insert_mpeg = fmt;
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CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,"
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"when sliced VBI is enabled\n");
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/*
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* If our current settings have no lines set for capture, store a valid,
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* default set of service lines to capture, in our current settings.
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*/
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if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
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if (cx->is_60hz)
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cx->vbi.sliced_in->service_set =
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V4L2_SLICED_CAPTION_525;
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else
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cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
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cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
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}
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return 0;
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}
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static int cx18_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
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{
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struct cx18 *cx = container_of(cxhdl, struct cx18, 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(cx->sd_av, video, s_mbus_fmt, &fmt);
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return 0;
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}
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static int cx18_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 cx18 *cx = container_of(cxhdl, struct cx18, 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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cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
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return 0;
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}
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static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
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{
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struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
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cx->dualwatch_stereo_mode = val;
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return 0;
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}
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struct cx2341x_handler_ops cx18_cxhdl_ops = {
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.s_audio_mode = cx18_s_audio_mode,
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.s_audio_sampling_freq = cx18_s_audio_sampling_freq,
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.s_video_encoding = cx18_s_video_encoding,
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.s_stream_vbi_fmt = cx18_s_stream_vbi_fmt,
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};
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