unsigned int ivtv_v4l2_enc_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];
int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
/* Start a capture if there is none */
if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
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 POLLERR;
}
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 (s->q_full.length || s->q_io.length)
return POLLIN | POLLRDNORM;
if (eof)
return POLLHUP;
return 0;
}
__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;
}
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;
}
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];
int rc;
IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name);
rc = ivtv_start_capture(id);
if (rc)
return rc;
return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
}
static int cx18_g_fmt_vid_cap(struct file *file, void *fh,
struct v4l2_format *fmt)
{
struct cx18_open_id *id = fh2id(fh);
struct cx18 *cx = id->cx;
struct cx18_stream *s = &cx->streams[id->type];
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
pixfmt->width = cx->cxhdl.width;
pixfmt->height = cx->cxhdl.height;
pixfmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
pixfmt->field = V4L2_FIELD_INTERLACED;
pixfmt->priv = 0;
if (id->type == CX18_ENC_STREAM_TYPE_YUV) {
pixfmt->pixelformat = s->pixelformat;
<<<<<<< HEAD
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;
}
__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;
}
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 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;
}
