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pipewire/spa/plugins/v4l2/v4l2-source.c
Wim Taymans 3f4ccaaea2 More hacking 
Add connection message for PORT_COMMAND
Add rtkit support to ask for realtime priority
work on stream states and improve negotiation
Rework of port linking works, keep separate state for realtime threads
and use message passing to update the state.
Don't try to link nodes that are removed.
Open the device in the ALSA monitor to detect source or sink
Implement send_command as async methods on the plugins, use async
replies to sync start and stop.
Work on alsa sink.
Implement async PAUSE/START on v4l2 src. move the STREAMON/OFF calls to
the mainloop because they have high latency, add the poll descriptors
from the data loop.
2016-10-28 16:56:33 +02:00

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/* Spa V4l2 Source
* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stddef.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/videodev2.h>
#include <spa/node.h>
#include <spa/video/format.h>
#include <spa/debug.h>
#include <spa/queue.h>
#include <spa/log.h>
#include <spa/id-map.h>
typedef struct _SpaV4l2Source SpaV4l2Source;
static const char default_device[] = "/dev/video0";
typedef struct {
SpaProps props;
char device[64];
char device_name[128];
int device_fd;
} SpaV4l2SourceProps;
static void
reset_v4l2_source_props (SpaV4l2SourceProps *props)
{
strncpy (props->device, default_device, 64);
props->props.unset_mask = 7;
}
#define MAX_BUFFERS 64
typedef struct _V4l2Buffer V4l2Buffer;
struct _V4l2Buffer {
SpaBuffer *outbuf;
SpaMetaHeader *h;
bool outstanding;
bool allocated;
struct v4l2_buffer v4l2_buffer;
V4l2Buffer *next;
};
typedef struct _V4l2Format V4l2Format;
struct _V4l2Format {
SpaFormat fmt;
SpaVideoFormat format;
SpaRectangle size;
SpaFraction framerate;
SpaVideoInterlaceMode interlace_mode;
SpaVideoColorRange color_range;
SpaVideoColorMatrix color_matrix;
SpaVideoTransferFunction transfer_function;
SpaVideoColorPrimaries color_primaries;
SpaPropInfo infos[16];
SpaPropRangeInfo ranges[16];
SpaFraction framerates[16];
};
typedef struct {
uint32_t node;
uint32_t clock;
} URI;
typedef struct {
SpaLog *log;
SpaPoll *main_loop;
SpaPoll *data_loop;
bool export_buf;
bool started;
bool next_fmtdesc;
struct v4l2_fmtdesc fmtdesc;
bool next_frmsize;
struct v4l2_frmsizeenum frmsize;
struct v4l2_frmivalenum frmival;
void *cookie;
V4l2Format format[2];
V4l2Format *current_format;
int fd;
bool opened;
struct v4l2_capability cap;
struct v4l2_format fmt;
enum v4l2_buf_type type;
enum v4l2_memory memtype;
V4l2Buffer buffers[MAX_BUFFERS];
unsigned int n_buffers;
SpaQueue ready;
SpaPollFd fds[1];
SpaPollItem poll;
SpaPortInfo info;
SpaAllocParam *params[2];
SpaAllocParamBuffers param_buffers;
SpaAllocParamMetaEnable param_meta;
SpaPortStatus status;
int64_t last_ticks;
int64_t last_monotonic;
} SpaV4l2State;
struct _SpaV4l2Source {
SpaHandle handle;
SpaNode node;
SpaClock clock;
URI uri;
SpaIDMap *map;
SpaLog *log;
uint32_t seq;
SpaV4l2SourceProps props[2];
SpaNodeEventCallback event_cb;
void *user_data;
SpaV4l2State state[1];
};
#define CHECK_PORT(this, direction, port_id) ((direction) == SPA_DIRECTION_OUTPUT && (port_id) == 0)
static void
update_state (SpaV4l2Source *this, SpaNodeState state)
{
spa_log_info (this->log, "state: %d\n", state);
this->node.state = state;
}
#include "v4l2-utils.c"
enum {
PROP_ID_DEVICE,
PROP_ID_DEVICE_NAME,
PROP_ID_DEVICE_FD,
PROP_ID_LAST,
};
static const SpaPropInfo prop_info[] =
{
{ PROP_ID_DEVICE, offsetof (SpaV4l2SourceProps, device),
"device",
SPA_PROP_FLAG_READWRITE,
SPA_PROP_TYPE_STRING, 63,
SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
NULL },
{ PROP_ID_DEVICE_NAME, offsetof (SpaV4l2SourceProps, device_name),
"device-name",
SPA_PROP_FLAG_READABLE,
SPA_PROP_TYPE_STRING, 127,
SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
NULL },
{ PROP_ID_DEVICE_FD, offsetof (SpaV4l2SourceProps, device_fd),
"device-fd",
SPA_PROP_FLAG_READABLE,
SPA_PROP_TYPE_UINT32, sizeof (uint32_t),
SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
NULL },
};
static SpaResult
spa_v4l2_source_node_get_props (SpaNode *node,
SpaProps **props)
{
SpaV4l2Source *this;
if (node == NULL || props == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
*props = &this->props[0].props;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_set_props (SpaNode *node,
const SpaProps *props)
{
SpaV4l2Source *this;
SpaV4l2SourceProps *p;
SpaResult res;
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
p = &this->props[1];
if (props == NULL) {
reset_v4l2_source_props (p);
return SPA_RESULT_OK;
}
res = spa_props_copy_values (props, &p->props);
return res;
}
static SpaResult
do_pause_done (SpaPoll *poll,
bool async,
uint32_t seq,
size_t size,
void *data,
void *user_data)
{
SpaV4l2Source *this = user_data;
SpaV4l2State *state = &this->state[0];
SpaNodeEventAsyncComplete *ac = data;
if (SPA_RESULT_IS_OK (ac->res))
ac->res = spa_v4l2_stream_off (this);
if (SPA_RESULT_IS_OK (ac->res)) {
state->started = false;
update_state (this, SPA_NODE_STATE_PAUSED);
}
this->event_cb (&this->node, &ac->event, this->user_data);
return SPA_RESULT_OK;
}
static SpaResult
do_pause (SpaPoll *poll,
bool async,
uint32_t seq,
size_t size,
void *data,
void *user_data)
{
SpaV4l2Source *this = user_data;
SpaResult res;
SpaNodeEventAsyncComplete ac;
SpaNodeCommand *cmd = data;
res = spa_node_port_send_command (&this->node,
SPA_DIRECTION_OUTPUT,
0,
cmd);
ac.event.type = SPA_NODE_EVENT_TYPE_ASYNC_COMPLETE;
ac.event.size = sizeof (SpaNodeEventAsyncComplete);
ac.seq = seq;
ac.res = res;
spa_poll_invoke (this->state[0].main_loop,
do_pause_done,
seq,
sizeof (ac),
&ac,
this);
return SPA_RESULT_OK;
}
static SpaResult
do_start_done (SpaPoll *poll,
bool async,
uint32_t seq,
size_t size,
void *data,
void *user_data)
{
SpaV4l2Source *this = user_data;
SpaV4l2State *state = &this->state[0];
SpaNodeEventAsyncComplete *ac = data;
if (SPA_RESULT_IS_OK (ac->res)) {
state->started = true;
update_state (this, SPA_NODE_STATE_STREAMING);
}
this->event_cb (&this->node, &ac->event, this->user_data);
return SPA_RESULT_OK;
}
static SpaResult
do_start (SpaPoll *poll,
bool async,
uint32_t seq,
size_t size,
void *data,
void *user_data)
{
SpaV4l2Source *this = user_data;
SpaResult res;
SpaNodeEventAsyncComplete ac;
SpaNodeCommand *cmd = data;
res = spa_node_port_send_command (&this->node,
SPA_DIRECTION_OUTPUT,
0,
cmd);
ac.event.type = SPA_NODE_EVENT_TYPE_ASYNC_COMPLETE;
ac.event.size = sizeof (SpaNodeEventAsyncComplete);
ac.seq = seq;
ac.res = res;
spa_poll_invoke (this->state[0].main_loop,
do_start_done,
seq,
sizeof (ac),
&ac,
this);
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_send_command (SpaNode *node,
SpaNodeCommand *command)
{
SpaV4l2Source *this;
if (node == NULL || command == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
switch (command->type) {
case SPA_NODE_COMMAND_INVALID:
return SPA_RESULT_INVALID_COMMAND;
case SPA_NODE_COMMAND_START:
{
SpaV4l2State *state = &this->state[0];
SpaResult res;
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
if (state->n_buffers == 0)
return SPA_RESULT_NO_BUFFERS;
if (state->started)
return SPA_RESULT_OK;
if ((res = spa_v4l2_stream_on (this)) < 0)
return res;
return spa_poll_invoke (this->state[0].data_loop,
do_start,
++this->seq,
command->size,
command,
this);
}
case SPA_NODE_COMMAND_PAUSE:
{
SpaV4l2State *state = &this->state[0];
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
if (state->n_buffers == 0)
return SPA_RESULT_NO_BUFFERS;
if (!state->started)
return SPA_RESULT_OK;
return spa_poll_invoke (this->state[0].data_loop,
do_pause,
++this->seq,
command->size,
command,
this);
}
case SPA_NODE_COMMAND_FLUSH:
case SPA_NODE_COMMAND_DRAIN:
case SPA_NODE_COMMAND_MARKER:
return SPA_RESULT_NOT_IMPLEMENTED;
case SPA_NODE_COMMAND_CLOCK_UPDATE:
{
return SPA_RESULT_OK;
}
}
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_set_event_callback (SpaNode *node,
SpaNodeEventCallback event,
void *user_data)
{
SpaV4l2Source *this;
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
this->event_cb = event;
this->user_data = user_data;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_get_n_ports (SpaNode *node,
unsigned int *n_input_ports,
unsigned int *max_input_ports,
unsigned int *n_output_ports,
unsigned int *max_output_ports)
{
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
if (n_input_ports)
*n_input_ports = 0;
if (max_input_ports)
*max_input_ports = 0;
if (n_output_ports)
*n_output_ports = 1;
if (max_output_ports)
*max_output_ports = 1;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_get_port_ids (SpaNode *node,
unsigned int n_input_ports,
uint32_t *input_ids,
unsigned int n_output_ports,
uint32_t *output_ids)
{
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
if (n_output_ports > 0 && output_ids != NULL)
output_ids[0] = 0;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_add_port (SpaNode *node,
SpaDirection direction,
uint32_t port_id)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static SpaResult
spa_v4l2_source_node_remove_port (SpaNode *node,
SpaDirection direction,
uint32_t port_id)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static void
spa_v4l2_format_init (V4l2Format *f)
{
f->fmt.props.n_prop_info = 3;
f->fmt.props.prop_info = f->infos;
spa_prop_info_fill_video (&f->infos[0],
SPA_PROP_ID_VIDEO_FORMAT,
offsetof (V4l2Format, format));
spa_prop_info_fill_video (&f->infos[1],
SPA_PROP_ID_VIDEO_SIZE,
offsetof (V4l2Format, size));
spa_prop_info_fill_video (&f->infos[2],
SPA_PROP_ID_VIDEO_FRAMERATE,
offsetof (V4l2Format, framerate));
}
static SpaResult
spa_v4l2_source_node_port_enum_formats (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaFormat **format,
const SpaFormat *filter,
void **state)
{
SpaV4l2Source *this;
SpaResult res;
if (node == NULL || format == NULL || state == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
res = spa_v4l2_enum_format (this, format, filter, state);
return res;
}
static SpaResult
spa_v4l2_source_node_port_set_format (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaPortFormatFlags flags,
const SpaFormat *format)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
V4l2Format *f, *tf;
size_t fs;
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
state = &this->state[port_id];
if (format == NULL) {
spa_v4l2_stream_off (this);
spa_v4l2_clear_buffers (this);
spa_v4l2_close (this);
state->current_format = NULL;
update_state (this, SPA_NODE_STATE_CONFIGURE);
return SPA_RESULT_OK;
}
f = &state->format[0];
tf = &state->format[1];
fs = sizeof (V4l2Format);
if ((SpaFormat*)f != format) {
spa_v4l2_format_init (f);
f->fmt.media_type = format->media_type;
f->fmt.media_subtype = format->media_subtype;
if ((res = spa_props_copy_values (&format->props, &f->fmt.props) < 0))
return res;
} else {
f = (V4l2Format*)format;
}
if (state->current_format) {
if (f->fmt.media_type == state->current_format->fmt.media_type &&
f->fmt.media_subtype == state->current_format->fmt.media_subtype &&
f->format == state->current_format->format &&
f->size.width == state->current_format->size.width &&
f->size.height == state->current_format->size.height)
return SPA_RESULT_OK;
if (!(flags & SPA_PORT_FORMAT_FLAG_TEST_ONLY)) {
spa_v4l2_use_buffers (this, NULL, 0);
state->current_format = NULL;
}
}
if (spa_v4l2_set_format (this, f, flags & SPA_PORT_FORMAT_FLAG_TEST_ONLY) < 0)
return SPA_RESULT_INVALID_MEDIA_TYPE;
if (!(flags & SPA_PORT_FORMAT_FLAG_TEST_ONLY)) {
memcpy (tf, f, fs);
state->current_format = tf;
update_state (this, SPA_NODE_STATE_READY);
}
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_port_get_format (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
const SpaFormat **format)
{
SpaV4l2Source *this;
SpaV4l2State *state;
if (node == NULL || format == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
state = &this->state[port_id];
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
*format = &state->current_format->fmt;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_port_get_info (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
const SpaPortInfo **info)
{
SpaV4l2Source *this;
if (node == NULL || info == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
*info = &this->state[port_id].info;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_port_get_props (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaProps **props)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static SpaResult
spa_v4l2_source_node_port_set_props (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
const SpaProps *props)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static SpaResult
spa_v4l2_source_node_port_use_buffers (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaBuffer **buffers,
uint32_t n_buffers)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
state = &this->state[port_id];
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
if (state->n_buffers) {
if ((res = spa_v4l2_clear_buffers (this)) < 0)
return res;
}
if (buffers != NULL) {
if ((res = spa_v4l2_use_buffers (this, buffers, n_buffers)) < 0)
return res;
}
if (state->n_buffers)
update_state (this, SPA_NODE_STATE_PAUSED);
else
update_state (this, SPA_NODE_STATE_READY);
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_port_alloc_buffers (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaAllocParam **params,
unsigned int n_params,
SpaBuffer **buffers,
unsigned int *n_buffers)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
if (node == NULL || buffers == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
state = &this->state[port_id];
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
res = spa_v4l2_alloc_buffers (this, params, n_params, buffers, n_buffers);
if (state->n_buffers) {
if (state->started)
update_state (this, SPA_NODE_STATE_STREAMING);
else
update_state (this, SPA_NODE_STATE_PAUSED);
}
return res;
}
static SpaResult
spa_v4l2_source_node_port_get_status (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
const SpaPortStatus **status)
{
SpaV4l2Source *this;
if (node == NULL || status == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (!CHECK_PORT (this, direction, port_id))
return SPA_RESULT_INVALID_PORT;
*status = &this->state[port_id].status;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_port_push_input (SpaNode *node,
unsigned int n_info,
SpaPortInputInfo *info)
{
return SPA_RESULT_INVALID_PORT;
}
static SpaResult
spa_v4l2_source_node_port_pull_output (SpaNode *node,
unsigned int n_info,
SpaPortOutputInfo *info)
{
SpaV4l2Source *this;
SpaV4l2State *state;
unsigned int i;
bool have_error = false;
if (node == NULL || n_info == 0 || info == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
for (i = 0; i < n_info; i++) {
V4l2Buffer *b;
if (info[i].port_id != 0) {
info[i].status = SPA_RESULT_INVALID_PORT;
have_error = true;
continue;
}
state = &this->state[info[i].port_id];
if (state->current_format == NULL) {
info[i].status = SPA_RESULT_NO_FORMAT;
have_error = true;
continue;
}
SPA_QUEUE_POP_HEAD (&state->ready, V4l2Buffer, next, b);
if (b == NULL) {
info[i].status = SPA_RESULT_UNEXPECTED;
have_error = true;
continue;
}
b->outstanding = true;
info[i].buffer_id = b->outbuf->id;
info[i].status = SPA_RESULT_OK;
}
if (have_error)
return SPA_RESULT_ERROR;
return SPA_RESULT_OK;
}
static SpaResult
spa_v4l2_source_node_port_reuse_buffer (SpaNode *node,
uint32_t port_id,
uint32_t buffer_id)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (port_id == 0, SPA_RESULT_INVALID_PORT);
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
state = &this->state[port_id];
spa_return_val_if_fail (state->n_buffers > 0, SPA_RESULT_NO_BUFFERS);
spa_return_val_if_fail (buffer_id < state->n_buffers, SPA_RESULT_INVALID_BUFFER_ID);
res = spa_v4l2_buffer_recycle (this, buffer_id);
return res;
}
static SpaResult
spa_v4l2_source_node_port_send_command (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaNodeCommand *command)
{
SpaV4l2Source *this;
SpaResult res;
if (node == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
if (port_id != 0)
return SPA_RESULT_INVALID_PORT;
switch (command->type) {
case SPA_NODE_COMMAND_PAUSE:
res = spa_v4l2_port_set_enabled (this, false);
break;
case SPA_NODE_COMMAND_START:
res = spa_v4l2_port_set_enabled (this, true);
break;
default:
res = SPA_RESULT_NOT_IMPLEMENTED;
break;
}
return res;
}
static const SpaNode v4l2source_node = {
sizeof (SpaNode),
NULL,
SPA_NODE_STATE_INIT,
spa_v4l2_source_node_get_props,
spa_v4l2_source_node_set_props,
spa_v4l2_source_node_send_command,
spa_v4l2_source_node_set_event_callback,
spa_v4l2_source_node_get_n_ports,
spa_v4l2_source_node_get_port_ids,
spa_v4l2_source_node_add_port,
spa_v4l2_source_node_remove_port,
spa_v4l2_source_node_port_enum_formats,
spa_v4l2_source_node_port_set_format,
spa_v4l2_source_node_port_get_format,
spa_v4l2_source_node_port_get_info,
spa_v4l2_source_node_port_get_props,
spa_v4l2_source_node_port_set_props,
spa_v4l2_source_node_port_use_buffers,
spa_v4l2_source_node_port_alloc_buffers,
spa_v4l2_source_node_port_get_status,
spa_v4l2_source_node_port_push_input,
spa_v4l2_source_node_port_pull_output,
spa_v4l2_source_node_port_reuse_buffer,
spa_v4l2_source_node_port_send_command,
};
static SpaResult
spa_v4l2_source_clock_get_props (SpaClock *clock,
SpaProps **props)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static SpaResult
spa_v4l2_source_clock_set_props (SpaClock *clock,
const SpaProps *props)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static SpaResult
spa_v4l2_source_clock_get_time (SpaClock *clock,
int32_t *rate,
int64_t *ticks,
int64_t *monotonic_time)
{
SpaV4l2Source *this;
SpaV4l2State *state;
if (clock == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = SPA_CONTAINER_OF (clock, SpaV4l2Source, clock);
state = &this->state[0];
if (rate)
*rate = SPA_USEC_PER_SEC;
if (ticks)
*ticks = state->last_ticks;
if (monotonic_time)
*monotonic_time = state->last_monotonic;
return SPA_RESULT_OK;
}
static const SpaClock v4l2source_clock = {
sizeof (SpaClock),
NULL,
SPA_CLOCK_STATE_STOPPED,
spa_v4l2_source_clock_get_props,
spa_v4l2_source_clock_set_props,
spa_v4l2_source_clock_get_time,
};
static SpaResult
spa_v4l2_source_get_interface (SpaHandle *handle,
uint32_t interface_id,
void **interface)
{
SpaV4l2Source *this;
if (handle == NULL || interface == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
this = (SpaV4l2Source *) handle;
if (interface_id == this->uri.node)
*interface = &this->node;
else if (interface_id == this->uri.clock)
*interface = &this->clock;
else
return SPA_RESULT_UNKNOWN_INTERFACE;
return SPA_RESULT_OK;
}
static SpaResult
v4l2_source_clear (SpaHandle *handle)
{
return SPA_RESULT_OK;
}
static SpaResult
v4l2_source_init (const SpaHandleFactory *factory,
SpaHandle *handle,
const SpaDict *info,
const SpaSupport *support,
unsigned int n_support)
{
SpaV4l2Source *this;
unsigned int i;
const char *str;
if (factory == NULL || handle == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
handle->get_interface = spa_v4l2_source_get_interface;
handle->clear = v4l2_source_clear,
this = (SpaV4l2Source *) handle;
for (i = 0; i < n_support; i++) {
if (strcmp (support[i].uri, SPA_ID_MAP_URI) == 0)
this->map = support[i].data;
else if (strcmp (support[i].uri, SPA_LOG_URI) == 0)
this->log = support[i].data;
else if (strcmp (support[i].uri, SPA_POLL__MainLoop) == 0)
this->state[0].main_loop = support[i].data;
else if (strcmp (support[i].uri, SPA_POLL__DataLoop) == 0)
this->state[0].data_loop = support[i].data;
}
if (this->map == NULL) {
spa_log_error (this->log, "an id-map is needed");
return SPA_RESULT_ERROR;
}
if (this->state[0].main_loop == NULL) {
spa_log_error (this->log, "a main_loop is needed");
return SPA_RESULT_ERROR;
}
if (this->state[0].data_loop == NULL) {
spa_log_error (this->log, "a data_loop is needed");
return SPA_RESULT_ERROR;
}
this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
this->uri.clock = spa_id_map_get_id (this->map, SPA_CLOCK_URI);
this->node = v4l2source_node;
this->clock = v4l2source_clock;
this->props[1].props.n_prop_info = PROP_ID_LAST;
this->props[1].props.prop_info = prop_info;
reset_v4l2_source_props (&this->props[1]);
SPA_QUEUE_INIT (&this->state[0].ready);
this->state[0].log = this->log;
this->state[0].info.flags = SPA_PORT_INFO_FLAG_LIVE;
this->state[0].status.flags = SPA_PORT_STATUS_FLAG_NONE;
this->state[0].export_buf = true;
if (info && (str = spa_dict_lookup (info, "device.path"))) {
strncpy (this->props[1].device, str, 63);
this->props[1].props.unset_mask &= ~1;
}
update_state (this, SPA_NODE_STATE_CONFIGURE);
return SPA_RESULT_OK;
}
static const SpaInterfaceInfo v4l2_source_interfaces[] =
{
{ SPA_NODE_URI, },
{ SPA_CLOCK_URI, },
};
static SpaResult
v4l2_source_enum_interface_info (const SpaHandleFactory *factory,
const SpaInterfaceInfo **info,
void **state)
{
int index;
if (factory == NULL || info == NULL || state == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
index = (*state == NULL ? 0 : *(int*)state);
if (index < 0 || index >= SPA_N_ELEMENTS (v4l2_source_interfaces))
return SPA_RESULT_ENUM_END;
*info = &v4l2_source_interfaces[index];
*(int*)state = ++index;
return SPA_RESULT_OK;
}
const SpaHandleFactory spa_v4l2_source_factory =
{ "v4l2-source",
NULL,
sizeof (SpaV4l2Source),
v4l2_source_init,
v4l2_source_enum_interface_info,
};
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