From 7d65dbe6b39c044f853f7155156ce8cd4e970d2e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Thu, 23 Aug 2007 22:51:07 +0200 Subject: ivtv: fix V4L2_ENC_CMD_STOP_AT_GOP_END support From: Hans Verkuil Support for V4L2_ENC_CMD_STOP_AT_GOP_END was broken. While the driver correctly waited for the card to capture until the GOP was complete, afterwards the driver buffers were just flushed instead of waiting for the application to read all the pending data. Signed-off-by: Hans Verkuil --- linux/drivers/media/video/ivtv/ivtv-fileops.c | 37 +++++++++++++++++---------- linux/drivers/media/video/ivtv/ivtv-streams.c | 8 ++---- 2 files changed, 26 insertions(+), 19 deletions(-) (limited to 'linux') diff --git a/linux/drivers/media/video/ivtv/ivtv-fileops.c b/linux/drivers/media/video/ivtv/ivtv-fileops.c index 170bef61a..5b5d6666f 100644 --- a/linux/drivers/media/video/ivtv/ivtv-fileops.c +++ b/linux/drivers/media/video/ivtv/ivtv-fileops.c @@ -258,19 +258,19 @@ static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, } return buf; } - /* return if file was opened with O_NONBLOCK */ - if (non_block) { - *err = -EAGAIN; - return NULL; - } /* return if end of stream */ if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { - clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); IVTV_DEBUG_INFO("EOS %s\n", s->name); return NULL; } + /* return if file was opened with O_NONBLOCK */ + if (non_block) { + *err = -EAGAIN; + return NULL; + } + /* wait for more data to arrive */ prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); /* New buffers might have become available before we were added to the waitqueue */ @@ -378,10 +378,20 @@ static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_co int rc; buf = ivtv_get_buffer(s, non_block, &rc); - if (buf == NULL && rc == -EAGAIN && tot_written) - break; - if (buf == NULL) + /* if there is no data available... */ + if (buf == NULL) { + /* if we got data, then return that regardless */ + if (tot_written) + break; + /* EOS condition */ + if (rc == 0) { + clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); + clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); + ivtv_release_stream(s); + } + /* set errno */ return rc; + } rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written); if (buf != &itv->vbi.sliced_mpeg_buf) { ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io); @@ -738,10 +748,11 @@ void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) ivtv_stop_v4l2_encode_stream(s, 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); + 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) diff --git a/linux/drivers/media/video/ivtv/ivtv-streams.c b/linux/drivers/media/video/ivtv/ivtv-streams.c index e05af62a8..a3296224f 100644 --- a/linux/drivers/media/video/ivtv/ivtv-streams.c +++ b/linux/drivers/media/video/ivtv/ivtv-streams.c @@ -719,7 +719,6 @@ int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end) struct ivtv *itv = s->itv; DECLARE_WAITQUEUE(wait, current); int cap_type; - unsigned long then; int stopmode; if (s->v4l2dev == NULL) @@ -762,14 +761,12 @@ int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end) /* when: 0 = end of GOP 1 = NOW!, type: 0 = mpeg, subtype: 3 = video+audio */ ivtv_vapi(itv, CX2341X_ENC_STOP_CAPTURE, 3, stopmode, cap_type, s->subtype); - then = jiffies; - if (!test_bit(IVTV_F_S_PASSTHROUGH, &s->s_flags)) { if (s->type == IVTV_ENC_STREAM_TYPE_MPG && gop_end) { /* only run these if we're shutting down the last cap */ unsigned long duration; + unsigned long then = jiffies; - then = jiffies; add_wait_queue(&itv->eos_waitq, &wait); set_current_state(TASK_INTERRUPTIBLE); @@ -797,10 +794,9 @@ int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end) } set_current_state(TASK_RUNNING); remove_wait_queue(&itv->eos_waitq, &wait); + set_bit(IVTV_F_S_STREAMOFF, &s->s_flags); } - then = jiffies; - /* Handle any pending interrupts */ ivtv_msleep_timeout(100, 1); } -- cgit v1.2.3