Commit bb8ce9d9 authored by Mike Isely's avatar Mike Isely Committed by Mauro Carvalho Chehab

V4L/DVB (7682): pvrusb2-dvb: finish up stream & buffer handling

Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMike Isely <isely@pobox.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent d8abe97d
......@@ -19,13 +19,198 @@
*/
#include <linux/kthread.h>
#include <linux/freezer.h>
#include "dvbdev.h"
#include "pvrusb2-hdw-internal.h"
#include "pvrusb2-hdw.h"
#include "pvrusb2-io.h"
#include "pvrusb2-dvb.h"
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
#define BUFFER_COUNT 32
#define BUFFER_SIZE PAGE_ALIGN(0x4000)
struct pvr2_dvb_fh {
struct pvr2_channel channel;
struct pvr2_stream *stream;
struct pvr2_dvb_adapter *adap;
wait_queue_head_t wait_data;
char *buffer_storage[BUFFER_COUNT];
};
static void pvr2_dvb_notify(struct pvr2_dvb_fh *fhp)
{
wake_up(&fhp->wait_data);
}
static int pvr2_dvb_fh_init(struct pvr2_dvb_fh *fh,
struct pvr2_dvb_adapter *adap)
{
struct pvr2_context *pvr = adap->pvr;
unsigned int idx;
int ret;
struct pvr2_buffer *bp;
init_waitqueue_head(&fh->wait_data);
fh->adap = adap;
pvr2_channel_init(&fh->channel, adap->pvr);
ret = pvr2_channel_claim_stream(&fh->channel, &pvr->video_stream);
/* somebody else already has the stream */
if (ret != 0)
return ret;
fh->stream = pvr->video_stream.stream;
for (idx = 0; idx < BUFFER_COUNT; idx++) {
fh->buffer_storage[idx] = kmalloc(BUFFER_SIZE, GFP_KERNEL);
if (!(fh->buffer_storage[idx]))
break;
}
if (idx < BUFFER_COUNT) {
/* An allocation appears to have failed */
ret = -ENOMEM;
goto cleanup;
}
pvr2_stream_set_callback(pvr->video_stream.stream,
(pvr2_stream_callback) pvr2_dvb_notify, fh);
ret = pvr2_stream_set_buffer_count(fh->stream, BUFFER_COUNT);
if (ret < 0)
return ret;
for (idx = 0; idx < BUFFER_COUNT; idx++) {
bp = pvr2_stream_get_buffer(fh->stream, idx);
pvr2_buffer_set_buffer(bp,
fh->buffer_storage[idx],
BUFFER_SIZE);
}
ret = pvr2_hdw_set_streaming(fh->channel.hdw, 1);
if (ret < 0)
goto cleanup;
while ((bp = pvr2_stream_get_idle_buffer(fh->stream)) != 0) {
ret = pvr2_buffer_queue(bp);
if (ret < 0)
goto cleanup;
}
return ret;
cleanup:
if (fh->stream)
pvr2_stream_kill(fh->stream);
for (idx = 0; idx < BUFFER_COUNT; idx++) {
if (!(fh->buffer_storage[idx]))
continue;
kfree(fh->buffer_storage[idx]);
}
pvr2_channel_done(&fh->channel);
return ret;
}
static void pvr2_dvb_fh_done(struct pvr2_dvb_fh *fh)
{
unsigned int idx;
pvr2_hdw_set_streaming(fh->channel.hdw, 0);
pvr2_stream_kill(fh->stream);
// pvr2_channel_claim_stream(&fh->channel, NULL);
for (idx = 0; idx < BUFFER_COUNT; idx++) {
if (!(fh->buffer_storage[idx]))
continue;
kfree(fh->buffer_storage[idx]);
}
pvr2_channel_done(&fh->channel);
}
static int pvr2_dvb_feed_thread(void *data)
{
struct pvr2_dvb_adapter *adap = data;
struct pvr2_dvb_fh fh;
int ret;
unsigned int count;
struct pvr2_buffer *bp;
printk(KERN_DEBUG "dvb thread started\n");
set_freezable();
memset(&fh, 0, sizeof(fh));
ret = pvr2_dvb_fh_init(&fh, adap);
if (ret != 0)
return ret;
for (;;) {
if ((0 == adap->feedcount) || (kthread_should_stop()))
break;
/* Not sure about this... */
try_to_freeze();
bp = pvr2_stream_get_ready_buffer(fh.stream);
if (bp != NULL) {
count = pvr2_buffer_get_count(bp);
if (count) {
dvb_dmx_swfilter(
&adap->demux,
fh.buffer_storage[
pvr2_buffer_get_id(bp)],
count);
} else {
ret = pvr2_buffer_get_status(bp);
if (ret < 0)
break;
}
ret = pvr2_buffer_queue(bp);
if (ret < 0)
break;
/* Since we know we did something to a buffer,
just go back and try again. No point in
blocking unless we really ran out of
buffers to process. */
continue;
}
/* Wait until more buffers become available. */
ret = wait_event_interruptible(
fh.wait_data,
pvr2_stream_get_ready_count(fh.stream) > 0);
if (ret < 0)
break;
}
pvr2_dvb_fh_done(&fh);
/* If we get here and ret is < 0, then an error has occurred.
Probably would be a good idea to communicate that to DVB core... */
printk(KERN_DEBUG "dvb thread stopped\n");
/* from videobuf-dvb.c: */
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
schedule();
}
return 0;
}
static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
{
struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv;
......@@ -52,6 +237,8 @@ static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
printk(KERN_DEBUG "start feeding\n");
adap->thread = kthread_run(pvr2_dvb_feed_thread,
adap, "pvrusb2-dvb");
if (IS_ERR(adap->thread)) {
ret = PTR_ERR(adap->thread);
adap->thread = NULL;
......
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