// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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file operation functions
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Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
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Copyright (C) 2004 Chris Kennedy <c@groovy.org>
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Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
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*/
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#include "ivtv-driver.h"
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#include "ivtv-fileops.h"
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#include "ivtv-i2c.h"
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#include "ivtv-queue.h"
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#include "ivtv-udma.h"
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#include "ivtv-irq.h"
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#include "ivtv-vbi.h"
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#include "ivtv-mailbox.h"
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#include "ivtv-routing.h"
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#include "ivtv-streams.h"
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#include "ivtv-yuv.h"
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#include "ivtv-ioctl.h"
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#include "ivtv-cards.h"
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#include "ivtv-firmware.h"
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#include <media/v4l2-event.h>
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#include <media/i2c/saa7115.h>
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/* This function tries to claim the stream for a specific file descriptor.
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If no one else is using this stream then the stream is claimed and
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associated VBI streams are also automatically claimed.
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Possible error returns: -EBUSY if someone else has claimed
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the stream or 0 on success. */
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int ivtv_claim_stream(struct ivtv_open_id *id, int type)
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{
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struct ivtv *itv = id->itv;
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struct ivtv_stream *s = &itv->streams[type];
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struct ivtv_stream *s_vbi;
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int vbi_type;
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if (test_and_set_bit(IVTV_F_S_CLAIMED, &s->s_flags)) {
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/* someone already claimed this stream */
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if (s->fh == &id->fh) {
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/* yes, this file descriptor did. So that's OK. */
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return 0;
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}
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if (s->fh == NULL && (type == IVTV_DEC_STREAM_TYPE_VBI ||
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type == IVTV_ENC_STREAM_TYPE_VBI)) {
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/* VBI is handled already internally, now also assign
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the file descriptor to this stream for external
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reading of the stream. */
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s->fh = &id->fh;
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IVTV_DEBUG_INFO("Start Read VBI\n");
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return 0;
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}
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/* someone else is using this stream already */
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IVTV_DEBUG_INFO("Stream %d is busy\n", type);
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return -EBUSY;
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}
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s->fh = &id->fh;
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if (type == IVTV_DEC_STREAM_TYPE_VBI) {
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/* Enable reinsertion interrupt */
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ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
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}
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/* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI,
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IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI
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(provided VBI insertion is on and sliced VBI is selected), for all
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other streams we're done */
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if (type == IVTV_DEC_STREAM_TYPE_MPG) {
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vbi_type = IVTV_DEC_STREAM_TYPE_VBI;
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} else if (type == IVTV_ENC_STREAM_TYPE_MPG &&
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itv->vbi.insert_mpeg && !ivtv_raw_vbi(itv)) {
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vbi_type = IVTV_ENC_STREAM_TYPE_VBI;
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} else {
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return 0;
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}
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s_vbi = &itv->streams[vbi_type];
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if (!test_and_set_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags)) {
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/* Enable reinsertion interrupt */
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if (vbi_type == IVTV_DEC_STREAM_TYPE_VBI)
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ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
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}
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/* mark that it is used internally */
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set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags);
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return 0;
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}
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EXPORT_SYMBOL(ivtv_claim_stream);
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/* This function releases a previously claimed stream. It will take into
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account associated VBI streams. */
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void ivtv_release_stream(struct ivtv_stream *s)
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{
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struct ivtv *itv = s->itv;
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struct ivtv_stream *s_vbi;
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s->fh = NULL;
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if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) &&
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test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) {
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/* this stream is still in use internally */
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return;
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}
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if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) {
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IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name);
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return;
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}
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ivtv_flush_queues(s);
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/* disable reinsertion interrupt */
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if (s->type == IVTV_DEC_STREAM_TYPE_VBI)
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ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
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/* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI,
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IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI,
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for all other streams we're done */
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if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
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s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI];
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else if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
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s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
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else
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return;
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/* clear internal use flag */
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if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) {
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/* was already cleared */
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return;
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}
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if (s_vbi->fh) {
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/* VBI stream still claimed by a file descriptor */
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return;
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}
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/* disable reinsertion interrupt */
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if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI)
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ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
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clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags);
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ivtv_flush_queues(s_vbi);
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}
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EXPORT_SYMBOL(ivtv_release_stream);
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static void ivtv_dualwatch(struct ivtv *itv)
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{
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struct v4l2_tuner vt;
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u32 new_stereo_mode;
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const u32 dual = 0x02;
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new_stereo_mode = v4l2_ctrl_g_ctrl(itv->cxhdl.audio_mode);
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memset(&vt, 0, sizeof(vt));
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ivtv_call_all(itv, tuner, g_tuner, &vt);
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if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2))
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new_stereo_mode = dual;
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if (new_stereo_mode == itv->dualwatch_stereo_mode)
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return;
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IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n",
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itv->dualwatch_stereo_mode, new_stereo_mode);
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if (v4l2_ctrl_s_ctrl(itv->cxhdl.audio_mode, new_stereo_mode))
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IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
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}
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static void ivtv_update_pgm_info(struct ivtv *itv)
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{
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u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24;
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int cnt;
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int i = 0;
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if (wr_idx >= itv->pgm_info_num) {
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IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num);
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return;
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}
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cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num;
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while (i < cnt) {
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int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num;
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struct v4l2_enc_idx_entry *e = itv->pgm_info + idx;
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u32 addr = itv->pgm_info_offset + 4 + idx * 24;
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const int mapping[8] = { -1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P, -1,
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V4L2_ENC_IDX_FRAME_B, -1, -1, -1 };
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// 1=I, 2=P, 4=B
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e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32);
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if (e->offset > itv->mpg_data_received) {
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break;
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}
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e->offset += itv->vbi_data_inserted;
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e->length = read_enc(addr);
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e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32);
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e->flags = mapping[read_enc(addr + 12) & 7];
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i++;
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}
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itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num;
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}
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static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err)
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{
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struct ivtv *itv = s->itv;
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struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
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struct ivtv_buffer *buf;
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DEFINE_WAIT(wait);
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*err = 0;
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while (1) {
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if (s->type == IVTV_ENC_STREAM_TYPE_MPG) {
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/* Process pending program info updates and pending VBI data */
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ivtv_update_pgm_info(itv);
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if (time_after(jiffies,
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itv->dualwatch_jiffies +
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msecs_to_jiffies(1000))) {
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itv->dualwatch_jiffies = jiffies;
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ivtv_dualwatch(itv);
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}
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if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
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!test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
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while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) {
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/* byteswap and process VBI data */
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ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type);
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ivtv_enqueue(s_vbi, buf, &s_vbi->q_free);
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}
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}
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buf = &itv->vbi.sliced_mpeg_buf;
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if (buf->readpos != buf->bytesused) {
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return buf;
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}
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}
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/* do we have leftover data? */
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buf = ivtv_dequeue(s, &s->q_io);
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if (buf)
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return buf;
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/* do we have new data? */
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buf = ivtv_dequeue(s, &s->q_full);
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if (buf) {
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if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0)
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return buf;
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buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP;
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if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
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/* byteswap MPG data */
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ivtv_buf_swap(buf);
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else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) {
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/* byteswap and process VBI data */
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ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type);
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}
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return buf;
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}
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/* return if end of stream */
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if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
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IVTV_DEBUG_INFO("EOS %s\n", s->name);
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return NULL;
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}
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/* return if file was opened with O_NONBLOCK */
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if (non_block) {
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*err = -EAGAIN;
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return NULL;
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}
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/* wait for more data to arrive */
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mutex_unlock(&itv->serialize_lock);
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prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
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/* New buffers might have become available before we were added to the waitqueue */
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if (!s->q_full.buffers)
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schedule();
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finish_wait(&s->waitq, &wait);
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mutex_lock(&itv->serialize_lock);
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if (signal_pending(current)) {
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/* return if a signal was received */
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IVTV_DEBUG_INFO("User stopped %s\n", s->name);
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*err = -EINTR;
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return NULL;
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}
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}
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}
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static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv)
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{
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int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
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itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx];
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itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx];
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itv->vbi.sliced_mpeg_buf.readpos = 0;
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}
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static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf,
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char __user *ubuf, size_t ucount)
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{
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struct ivtv *itv = s->itv;
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size_t len = buf->bytesused - buf->readpos;
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if (len > ucount) len = ucount;
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if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG &&
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!ivtv_raw_vbi(itv) && buf != &itv->vbi.sliced_mpeg_buf) {
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const char *start = buf->buf + buf->readpos;
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const char *p = start + 1;
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const u8 *q;
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u8 ch = itv->search_pack_header ? 0xba : 0xe0;
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int stuffing, i;
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while (start + len > p && (q = memchr(p, 0, start + len - p))) {
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p = q + 1;
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if ((char *)q + 15 >= buf->buf + buf->bytesused ||
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q[1] != 0 || q[2] != 1 || q[3] != ch) {
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continue;
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}
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if (!itv->search_pack_header) {
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if ((q[6] & 0xc0) != 0x80)
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continue;
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if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) ||
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((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) {
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ch = 0xba;
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itv->search_pack_header = 1;
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p = q + 9;
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}
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continue;
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}
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stuffing = q[13] & 7;
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/* all stuffing bytes must be 0xff */
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for (i = 0; i < stuffing; i++)
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if (q[14 + i] != 0xff)
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break;
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if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 &&
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q[14 + stuffing] == 0 && q[15 + stuffing] == 0 &&
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q[16 + stuffing] == 1) {
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itv->search_pack_header = 0;
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len = (char *)q - start;
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ivtv_setup_sliced_vbi_buf(itv);
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break;
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}
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}
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}
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if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) {
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IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name);
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return -EFAULT;
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}
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/*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount,
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buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len,
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buf == &itv->vbi.sliced_mpeg_buf); */
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buf->readpos += len;
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if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf)
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itv->mpg_data_received += len;
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return len;
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}
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static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block)
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{
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struct ivtv *itv = s->itv;
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size_t tot_written = 0;
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int single_frame = 0;
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if (atomic_read(&itv->capturing) == 0 && s->fh == NULL) {
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/* shouldn't happen */
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IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name);
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return -EIO;
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}
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/* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should
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arrive one-by-one, so make sure we never output more than one VBI frame at a time */
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if (s->type == IVTV_DEC_STREAM_TYPE_VBI ||
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(s->type == IVTV_ENC_STREAM_TYPE_VBI && !ivtv_raw_vbi(itv)))
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single_frame = 1;
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for (;;) {
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struct ivtv_buffer *buf;
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int rc;
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buf = ivtv_get_buffer(s, non_block, &rc);
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/* if there is no data available... */
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if (buf == NULL) {
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/* if we got data, then return that regardless */
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if (tot_written)
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break;
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/* EOS condition */
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if (rc == 0) {
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clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
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clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
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ivtv_release_stream(s);
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}
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/* set errno */
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return rc;
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}
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rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written);
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if (buf != &itv->vbi.sliced_mpeg_buf) {
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ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io);
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}
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else if (buf->readpos == buf->bytesused) {
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int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
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itv->vbi.sliced_mpeg_size[idx] = 0;
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itv->vbi.inserted_frame++;
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itv->vbi_data_inserted += buf->bytesused;
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}
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if (rc < 0)
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return rc;
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tot_written += rc;
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if (tot_written == tot_count || single_frame)
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break;
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}
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return tot_written;
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}
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static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count,
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loff_t *pos, int non_block)
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{
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ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0;
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struct ivtv *itv = s->itv;
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IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc);
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if (rc > 0)
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*pos += rc;
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return rc;
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}
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int ivtv_start_capture(struct ivtv_open_id *id)
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{
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struct ivtv *itv = id->itv;
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struct ivtv_stream *s = &itv->streams[id->type];
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struct ivtv_stream *s_vbi;
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if (s->type == IVTV_ENC_STREAM_TYPE_RAD ||
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s->type == IVTV_DEC_STREAM_TYPE_MPG ||
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s->type == IVTV_DEC_STREAM_TYPE_YUV ||
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s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
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/* you cannot read from these stream types. */
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return -EINVAL;
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}
|
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/* Try to claim this stream. */
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if (ivtv_claim_stream(id, s->type))
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return -EBUSY;
|
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/* This stream does not need to start capturing */
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if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
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set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
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return 0;
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}
|
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/* If capture is already in progress, then we also have to
|
do nothing extra. */
|
if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
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set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
return 0;
|
}
|
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/* Start VBI capture if required */
|
s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
|
if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
|
test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
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!test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
|
/* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
|
automatically when the MPG stream is claimed.
|
We only need to start the VBI capturing. */
|
if (ivtv_start_v4l2_encode_stream(s_vbi)) {
|
IVTV_DEBUG_WARN("VBI capture start failed\n");
|
|
/* Failure, clean up and return an error */
|
clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
|
clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
|
/* also releases the associated VBI stream */
|
ivtv_release_stream(s);
|
return -EIO;
|
}
|
IVTV_DEBUG_INFO("VBI insertion started\n");
|
}
|
|
/* Tell the card to start capturing */
|
if (!ivtv_start_v4l2_encode_stream(s)) {
|
/* We're done */
|
set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
/* Resume a possibly paused encoder */
|
if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags))
|
ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1);
|
return 0;
|
}
|
|
/* failure, clean up */
|
IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
|
|
/* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
|
automatically when the MPG stream is released.
|
We only need to stop the VBI capturing. */
|
if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
|
test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
|
ivtv_stop_v4l2_encode_stream(s_vbi, 0);
|
clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
|
}
|
clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
|
ivtv_release_stream(s);
|
return -EIO;
|
}
|
|
ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos)
|
{
|
struct ivtv_open_id *id = fh2id(filp->private_data);
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
ssize_t rc;
|
|
IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name);
|
|
if (mutex_lock_interruptible(&itv->serialize_lock))
|
return -ERESTARTSYS;
|
rc = ivtv_start_capture(id);
|
if (!rc)
|
rc = ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
|
mutex_unlock(&itv->serialize_lock);
|
return rc;
|
}
|
|
int ivtv_start_decoding(struct ivtv_open_id *id, int speed)
|
{
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
int rc;
|
|
if (atomic_read(&itv->decoding) == 0) {
|
if (ivtv_claim_stream(id, s->type)) {
|
/* someone else is using this stream already */
|
IVTV_DEBUG_WARN("start decode, stream already claimed\n");
|
return -EBUSY;
|
}
|
rc = ivtv_start_v4l2_decode_stream(s, 0);
|
if (rc < 0) {
|
if (rc == -EAGAIN)
|
rc = ivtv_start_v4l2_decode_stream(s, 0);
|
if (rc < 0)
|
return rc;
|
}
|
}
|
if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
|
return ivtv_set_speed(itv, speed);
|
return 0;
|
}
|
|
static ssize_t ivtv_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
|
{
|
struct ivtv_open_id *id = fh2id(filp->private_data);
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
struct yuv_playback_info *yi = &itv->yuv_info;
|
struct ivtv_buffer *buf;
|
struct ivtv_queue q;
|
int bytes_written = 0;
|
int mode;
|
int rc;
|
DEFINE_WAIT(wait);
|
|
IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name);
|
|
if (s->type != IVTV_DEC_STREAM_TYPE_MPG &&
|
s->type != IVTV_DEC_STREAM_TYPE_YUV &&
|
s->type != IVTV_DEC_STREAM_TYPE_VOUT)
|
/* not decoder streams */
|
return -EINVAL;
|
|
/* Try to claim this stream */
|
if (ivtv_claim_stream(id, s->type))
|
return -EBUSY;
|
|
/* This stream does not need to start any decoding */
|
if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
|
int elems = count / sizeof(struct v4l2_sliced_vbi_data);
|
|
set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
return ivtv_write_vbi_from_user(itv,
|
(const struct v4l2_sliced_vbi_data __user *)user_buf, elems);
|
}
|
|
mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV;
|
|
if (ivtv_set_output_mode(itv, mode) != mode) {
|
ivtv_release_stream(s);
|
return -EBUSY;
|
}
|
ivtv_queue_init(&q);
|
set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
|
/* Start decoder (returns 0 if already started) */
|
rc = ivtv_start_decoding(id, itv->speed);
|
if (rc) {
|
IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name);
|
|
/* failure, clean up */
|
clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
|
clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
return rc;
|
}
|
|
retry:
|
/* If possible, just DMA the entire frame - Check the data transfer size
|
since we may get here before the stream has been fully set-up */
|
if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) {
|
while (count >= itv->dma_data_req_size) {
|
rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf);
|
|
if (rc < 0)
|
return rc;
|
|
bytes_written += itv->dma_data_req_size;
|
user_buf += itv->dma_data_req_size;
|
count -= itv->dma_data_req_size;
|
}
|
if (count == 0) {
|
IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
|
return bytes_written;
|
}
|
}
|
|
for (;;) {
|
/* Gather buffers */
|
while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io)))
|
ivtv_enqueue(s, buf, &q);
|
while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) {
|
ivtv_enqueue(s, buf, &q);
|
}
|
if (q.buffers)
|
break;
|
if (filp->f_flags & O_NONBLOCK)
|
return -EAGAIN;
|
mutex_unlock(&itv->serialize_lock);
|
prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
|
/* New buffers might have become free before we were added to the waitqueue */
|
if (!s->q_free.buffers)
|
schedule();
|
finish_wait(&s->waitq, &wait);
|
mutex_lock(&itv->serialize_lock);
|
if (signal_pending(current)) {
|
IVTV_DEBUG_INFO("User stopped %s\n", s->name);
|
return -EINTR;
|
}
|
}
|
|
/* copy user data into buffers */
|
while ((buf = ivtv_dequeue(s, &q))) {
|
/* yuv is a pain. Don't copy more data than needed for a single
|
frame, otherwise we lose sync with the incoming stream */
|
if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
|
yi->stream_size + count > itv->dma_data_req_size)
|
rc = ivtv_buf_copy_from_user(s, buf, user_buf,
|
itv->dma_data_req_size - yi->stream_size);
|
else
|
rc = ivtv_buf_copy_from_user(s, buf, user_buf, count);
|
|
/* Make sure we really got all the user data */
|
if (rc < 0) {
|
ivtv_queue_move(s, &q, NULL, &s->q_free, 0);
|
return rc;
|
}
|
user_buf += rc;
|
count -= rc;
|
bytes_written += rc;
|
|
if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
|
yi->stream_size += rc;
|
/* If we have a complete yuv frame, break loop now */
|
if (yi->stream_size == itv->dma_data_req_size) {
|
ivtv_enqueue(s, buf, &s->q_full);
|
yi->stream_size = 0;
|
break;
|
}
|
}
|
|
if (buf->bytesused != s->buf_size) {
|
/* incomplete, leave in q_io for next time */
|
ivtv_enqueue(s, buf, &s->q_io);
|
break;
|
}
|
/* Byteswap MPEG buffer */
|
if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
|
ivtv_buf_swap(buf);
|
ivtv_enqueue(s, buf, &s->q_full);
|
}
|
|
if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) {
|
if (s->q_full.length >= itv->dma_data_req_size) {
|
int got_sig;
|
|
if (mode == OUT_YUV)
|
ivtv_yuv_setup_stream_frame(itv);
|
|
mutex_unlock(&itv->serialize_lock);
|
prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
|
while (!(got_sig = signal_pending(current)) &&
|
test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) {
|
schedule();
|
}
|
finish_wait(&itv->dma_waitq, &wait);
|
mutex_lock(&itv->serialize_lock);
|
if (got_sig) {
|
IVTV_DEBUG_INFO("User interrupted %s\n", s->name);
|
return -EINTR;
|
}
|
|
clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
|
ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size);
|
ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1);
|
}
|
}
|
/* more user data is available, wait until buffers become free
|
to transfer the rest. */
|
if (count && !(filp->f_flags & O_NONBLOCK))
|
goto retry;
|
IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
|
return bytes_written;
|
}
|
|
ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
|
{
|
struct ivtv_open_id *id = fh2id(filp->private_data);
|
struct ivtv *itv = id->itv;
|
ssize_t res;
|
|
if (mutex_lock_interruptible(&itv->serialize_lock))
|
return -ERESTARTSYS;
|
res = ivtv_write(filp, user_buf, count, pos);
|
mutex_unlock(&itv->serialize_lock);
|
return res;
|
}
|
|
__poll_t ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
|
{
|
struct ivtv_open_id *id = fh2id(filp->private_data);
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
__poll_t res = 0;
|
|
/* add stream's waitq to the poll list */
|
IVTV_DEBUG_HI_FILE("Decoder poll\n");
|
|
/* If there are subscribed events, then only use the new event
|
API instead of the old video.h based API. */
|
if (!list_empty(&id->fh.subscribed)) {
|
poll_wait(filp, &id->fh.wait, wait);
|
/* Turn off the old-style vsync events */
|
clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
|
if (v4l2_event_pending(&id->fh))
|
res = EPOLLPRI;
|
} else {
|
/* This is the old-style API which is here only for backwards
|
compatibility. */
|
poll_wait(filp, &s->waitq, wait);
|
set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
|
if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) ||
|
test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
|
res = EPOLLPRI;
|
}
|
|
/* Allow write if buffers are available for writing */
|
if (s->q_free.buffers)
|
res |= EPOLLOUT | EPOLLWRNORM;
|
return res;
|
}
|
|
__poll_t ivtv_v4l2_enc_poll(struct file *filp, poll_table *wait)
|
{
|
__poll_t req_events = poll_requested_events(wait);
|
struct ivtv_open_id *id = fh2id(filp->private_data);
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
|
__poll_t res = 0;
|
|
/* Start a capture if there is none */
|
if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags) &&
|
s->type != IVTV_ENC_STREAM_TYPE_RAD &&
|
(req_events & (EPOLLIN | EPOLLRDNORM))) {
|
int rc;
|
|
mutex_lock(&itv->serialize_lock);
|
rc = ivtv_start_capture(id);
|
mutex_unlock(&itv->serialize_lock);
|
if (rc) {
|
IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
|
s->name, rc);
|
return EPOLLERR;
|
}
|
IVTV_DEBUG_FILE("Encoder poll started capture\n");
|
}
|
|
/* add stream's waitq to the poll list */
|
IVTV_DEBUG_HI_FILE("Encoder poll\n");
|
poll_wait(filp, &s->waitq, wait);
|
if (v4l2_event_pending(&id->fh))
|
res |= EPOLLPRI;
|
else
|
poll_wait(filp, &id->fh.wait, wait);
|
|
if (s->q_full.length || s->q_io.length)
|
return res | EPOLLIN | EPOLLRDNORM;
|
if (eof)
|
return res | EPOLLHUP;
|
return res;
|
}
|
|
void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end)
|
{
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
|
IVTV_DEBUG_FILE("close() of %s\n", s->name);
|
|
/* 'Unclaim' this stream */
|
|
/* Stop capturing */
|
if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
|
struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
|
|
IVTV_DEBUG_INFO("close stopping capture\n");
|
/* Special case: a running VBI capture for VBI insertion
|
in the mpeg stream. Need to stop that too. */
|
if (id->type == IVTV_ENC_STREAM_TYPE_MPG &&
|
test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) &&
|
!test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
|
IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
|
ivtv_stop_v4l2_encode_stream(s_vbi, 0);
|
}
|
if ((id->type == IVTV_DEC_STREAM_TYPE_VBI ||
|
id->type == IVTV_ENC_STREAM_TYPE_VBI) &&
|
test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) {
|
/* Also used internally, don't stop capturing */
|
s->fh = NULL;
|
}
|
else {
|
ivtv_stop_v4l2_encode_stream(s, gop_end);
|
}
|
}
|
if (!gop_end) {
|
clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
|
ivtv_release_stream(s);
|
}
|
}
|
|
static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
|
{
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
|
IVTV_DEBUG_FILE("close() of %s\n", s->name);
|
|
if (id->type == IVTV_DEC_STREAM_TYPE_YUV &&
|
test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) {
|
/* Restore registers we've changed & clean up any mess */
|
ivtv_yuv_close(itv);
|
}
|
|
/* Stop decoding */
|
if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
|
IVTV_DEBUG_INFO("close stopping decode\n");
|
|
ivtv_stop_v4l2_decode_stream(s, flags, pts);
|
itv->output_mode = OUT_NONE;
|
}
|
clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
|
clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
|
|
if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames)
|
itv->output_mode = OUT_NONE;
|
|
itv->speed = 0;
|
clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags);
|
ivtv_release_stream(s);
|
}
|
|
int ivtv_v4l2_close(struct file *filp)
|
{
|
struct v4l2_fh *fh = filp->private_data;
|
struct ivtv_open_id *id = fh2id(fh);
|
struct ivtv *itv = id->itv;
|
struct ivtv_stream *s = &itv->streams[id->type];
|
|
IVTV_DEBUG_FILE("close %s\n", s->name);
|
|
mutex_lock(&itv->serialize_lock);
|
|
/* Stop radio */
|
if (id->type == IVTV_ENC_STREAM_TYPE_RAD &&
|
v4l2_fh_is_singular_file(filp)) {
|
/* Closing radio device, return to TV mode */
|
ivtv_mute(itv);
|
/* Mark that the radio is no longer in use */
|
clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
|
/* Switch tuner to TV */
|
ivtv_call_all(itv, video, s_std, itv->std);
|
/* Select correct audio input (i.e. TV tuner or Line in) */
|
ivtv_audio_set_io(itv);
|
if (itv->hw_flags & IVTV_HW_SAA711X) {
|
ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
|
SAA7115_FREQ_32_11_MHZ, 0);
|
}
|
if (atomic_read(&itv->capturing) > 0) {
|
/* Undo video mute */
|
ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1,
|
v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) |
|
(v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8));
|
}
|
/* Done! Unmute and continue. */
|
ivtv_unmute(itv);
|
}
|
|
v4l2_fh_del(fh);
|
v4l2_fh_exit(fh);
|
|
/* Easy case first: this stream was never claimed by us */
|
if (s->fh != &id->fh)
|
goto close_done;
|
|
/* 'Unclaim' this stream */
|
|
if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) {
|
struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT];
|
|
ivtv_stop_decoding(id, V4L2_DEC_CMD_STOP_TO_BLACK | V4L2_DEC_CMD_STOP_IMMEDIATELY, 0);
|
|
/* If all output streams are closed, and if the user doesn't have
|
IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */
|
if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) {
|
/* disable CC on TV-out */
|
ivtv_disable_cc(itv);
|
}
|
} else {
|
ivtv_stop_capture(id, 0);
|
}
|
close_done:
|
kfree(id);
|
mutex_unlock(&itv->serialize_lock);
|
return 0;
|
}
|
|
static int ivtv_open(struct file *filp)
|
{
|
struct video_device *vdev = video_devdata(filp);
|
struct ivtv_stream *s = video_get_drvdata(vdev);
|
struct ivtv *itv = s->itv;
|
struct ivtv_open_id *item;
|
int res = 0;
|
|
IVTV_DEBUG_FILE("open %s\n", s->name);
|
|
if (ivtv_init_on_first_open(itv)) {
|
IVTV_ERR("Failed to initialize on device %s\n",
|
video_device_node_name(vdev));
|
return -ENXIO;
|
}
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
/* Unless ivtv_fw_debug is set, error out if firmware dead. */
|
if (ivtv_fw_debug) {
|
IVTV_WARN("Opening %s with dead firmware lockout disabled\n",
|
video_device_node_name(vdev));
|
IVTV_WARN("Selected firmware errors will be ignored\n");
|
} else {
|
#else
|
if (1) {
|
#endif
|
res = ivtv_firmware_check(itv, "ivtv_serialized_open");
|
if (res == -EAGAIN)
|
res = ivtv_firmware_check(itv, "ivtv_serialized_open");
|
if (res < 0)
|
return -EIO;
|
}
|
|
if (s->type == IVTV_DEC_STREAM_TYPE_MPG &&
|
test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
|
return -EBUSY;
|
|
if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
|
test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
|
return -EBUSY;
|
|
if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
|
if (read_reg(0x82c) == 0) {
|
IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
|
/* return -ENODEV; */
|
}
|
ivtv_udma_alloc(itv);
|
}
|
|
/* Allocate memory */
|
item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
|
if (NULL == item) {
|
IVTV_DEBUG_WARN("nomem on v4l2 open\n");
|
return -ENOMEM;
|
}
|
v4l2_fh_init(&item->fh, &s->vdev);
|
item->itv = itv;
|
item->type = s->type;
|
|
filp->private_data = &item->fh;
|
v4l2_fh_add(&item->fh);
|
|
if (item->type == IVTV_ENC_STREAM_TYPE_RAD &&
|
v4l2_fh_is_singular_file(filp)) {
|
if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
|
if (atomic_read(&itv->capturing) > 0) {
|
/* switching to radio while capture is
|
in progress is not polite */
|
v4l2_fh_del(&item->fh);
|
v4l2_fh_exit(&item->fh);
|
kfree(item);
|
return -EBUSY;
|
}
|
}
|
/* Mark that the radio is being used. */
|
set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
|
/* We have the radio */
|
ivtv_mute(itv);
|
/* Switch tuner to radio */
|
ivtv_call_all(itv, tuner, s_radio);
|
/* Select the correct audio input (i.e. radio tuner) */
|
ivtv_audio_set_io(itv);
|
if (itv->hw_flags & IVTV_HW_SAA711X) {
|
ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
|
SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL);
|
}
|
/* Done! Unmute and continue. */
|
ivtv_unmute(itv);
|
}
|
|
/* YUV or MPG Decoding Mode? */
|
if (s->type == IVTV_DEC_STREAM_TYPE_MPG) {
|
clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
|
} else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
|
set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
|
/* For yuv, we need to know the dma size before we start */
|
itv->dma_data_req_size =
|
1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31);
|
itv->yuv_info.stream_size = 0;
|
}
|
return 0;
|
}
|
|
int ivtv_v4l2_open(struct file *filp)
|
{
|
struct video_device *vdev = video_devdata(filp);
|
int res;
|
|
if (mutex_lock_interruptible(vdev->lock))
|
return -ERESTARTSYS;
|
res = ivtv_open(filp);
|
mutex_unlock(vdev->lock);
|
return res;
|
}
|
|
void ivtv_mute(struct ivtv *itv)
|
{
|
if (atomic_read(&itv->capturing))
|
ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1);
|
IVTV_DEBUG_INFO("Mute\n");
|
}
|
|
void ivtv_unmute(struct ivtv *itv)
|
{
|
if (atomic_read(&itv->capturing)) {
|
ivtv_msleep_timeout(100, 0);
|
ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
|
ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
|
}
|
IVTV_DEBUG_INFO("Unmute\n");
|
}
|
