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Improve state handling

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Improve the state handling in v4l2
Send buffers in one message
Update design doc
This commit is contained in:
Wim Taymans 2016-08-25 17:07:40 +02:00
parent fbd6304663
commit 7e858ff694
8 changed files with 202 additions and 453 deletions
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103
spa/plugins/v4l2/v4l2-source.c
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@ -119,6 +119,7 @@ typedef struct {
struct _SpaV4l2Source {
SpaHandle handle;
SpaNode node;
SpaNodeState node_state;
SpaV4l2SourceProps props[2];
@ -201,11 +202,16 @@ spa_v4l2_source_node_set_props (SpaNode *node,
}
static void
send_state_change (SpaV4l2Source *this, SpaNodeState state)
update_state (SpaV4l2Source *this, SpaNodeState state)
{
SpaEvent event;
SpaEventStateChange sc;
if (this->node_state == state)
return;
this->node_state = state;
event.type = SPA_EVENT_TYPE_STATE_CHANGE;
event.port_id = -1;
event.data = ≻
@ -219,6 +225,7 @@ spa_v4l2_source_node_send_command (SpaNode *node,
SpaCommand *command)
{
SpaV4l2Source *this;
SpaResult res;
if (node == NULL || node->handle == NULL || command == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
@ -230,15 +237,37 @@ spa_v4l2_source_node_send_command (SpaNode *node,
return SPA_RESULT_INVALID_COMMAND;
case SPA_COMMAND_START:
spa_v4l2_start (this);
{
SpaV4l2State *state = &this->state[0];
send_state_change (this, SPA_NODE_STATE_STREAMING);
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
if (!state->have_buffers)
return SPA_RESULT_NO_BUFFERS;
if ((res = spa_v4l2_start (this)) < 0)
return res;
update_state (this, SPA_NODE_STATE_STREAMING);
break;
}
case SPA_COMMAND_PAUSE:
spa_v4l2_stop (this);
{
SpaV4l2State *state = &this->state[0];
send_state_change (this, SPA_NODE_STATE_PAUSED);
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
if (!state->have_buffers)
return SPA_RESULT_NO_BUFFERS;
if ((res = spa_v4l2_pause (this)) < 0)
return res;
update_state (this, SPA_NODE_STATE_PAUSED);
break;
}
case SPA_COMMAND_FLUSH:
case SPA_COMMAND_DRAIN:
@ -263,7 +292,7 @@ spa_v4l2_source_node_set_event_callback (SpaNode *node,
this->event_cb = event;
this->user_data = user_data;
send_state_change (this, SPA_NODE_STATE_CONFIGURE);
update_state (this, SPA_NODE_STATE_CONFIGURE);
return SPA_RESULT_OK;
}
@ -385,6 +414,8 @@ spa_v4l2_source_node_port_set_format (SpaNode *node,
state = &this->state[port_id];
if (format == NULL) {
spa_v4l2_clear_buffers (this);
spa_v4l2_close (this);
state->current_format = NULL;
return SPA_RESULT_OK;
}
@ -410,6 +441,11 @@ spa_v4l2_source_node_port_set_format (SpaNode *node,
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)
@ -419,7 +455,7 @@ spa_v4l2_source_node_port_set_format (SpaNode *node,
memcpy (tf, f, fs);
state->current_format = tf;
send_state_change (this, SPA_NODE_STATE_READY);
update_state (this, SPA_NODE_STATE_READY);
}
return SPA_RESULT_OK;
@ -494,6 +530,8 @@ spa_v4l2_source_node_port_use_buffers (SpaNode *node,
uint32_t n_buffers)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
if (node == NULL || node->handle == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
@ -503,9 +541,26 @@ spa_v4l2_source_node_port_use_buffers (SpaNode *node,
if (port_id != 0)
return SPA_RESULT_INVALID_PORT;
spa_v4l2_import_buffers (this, buffers, n_buffers);
state = &this->state[port_id];
return SPA_RESULT_OK;
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
if (state->have_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->have_buffers)
update_state (this, SPA_NODE_STATE_PAUSED);
else
update_state (this, SPA_NODE_STATE_READY);
return res;
}
static SpaResult
@ -517,6 +572,8 @@ spa_v4l2_source_node_port_alloc_buffers (SpaNode *node,
unsigned int *n_buffers)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
if (node == NULL || node->handle == NULL || buffers == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
@ -526,9 +583,17 @@ spa_v4l2_source_node_port_alloc_buffers (SpaNode *node,
if (port_id != 0)
return SPA_RESULT_INVALID_PORT;
spa_v4l2_alloc_buffers (this, params, n_params, buffers, n_buffers);
state = &this->state[port_id];
return SPA_RESULT_OK;
if (state->current_format == NULL)
return SPA_RESULT_NO_FORMAT;
res = spa_v4l2_alloc_buffers (this, params, n_params, buffers, n_buffers);
if (state->have_buffers)
update_state (this, SPA_NODE_STATE_PAUSED);
return res;
}
static SpaResult
@ -537,6 +602,8 @@ spa_v4l2_source_node_port_reuse_buffer (SpaNode *node,
uint32_t buffer_id)
{
SpaV4l2Source *this;
SpaV4l2State *state;
SpaResult res;
if (node == NULL || node->handle == NULL)
return SPA_RESULT_INVALID_ARGUMENTS;
@ -546,9 +613,17 @@ spa_v4l2_source_node_port_reuse_buffer (SpaNode *node,
if (port_id != 0)
return SPA_RESULT_INVALID_PORT;
spa_v4l2_buffer_recycle (this, buffer_id);
state = &this->state[port_id];
return SPA_RESULT_OK;
if (!state->have_buffers)
return SPA_RESULT_NO_BUFFERS;
if (buffer_id >= state->reqbuf.count)
return SPA_RESULT_INVALID_BUFFER_ID;
res = spa_v4l2_buffer_recycle (this, buffer_id);
return res;
}
static SpaResult
@ -710,6 +785,8 @@ v4l2_source_init (const SpaHandleFactory *factory,
this->state[0].export_buf = true;
this->node_state = SPA_NODE_STATE_INIT;
return SPA_RESULT_OK;
}