static void *guard_func(void *param)
{
GUARD_T *st = (GUARD_T *) param;
uint32_t set;
while(1)
{
int i;
vcos_event_flags_get(&st->event, -1, VCOS_OR_CONSUME, 0, &set);
vcos_semaphore_wait(&st->go);
if(st->quit)
break;
for(i=0; i<2; i++)
{
if(vcos_event_flags_get(&st->event, 1, VCOS_OR, st->wait[i], &set) != VCOS_SUCCESS)
{
int j;
st->timeout[i] = 1;
for(j=0; j<st->post[i]; j++)
vcos_semaphore_post(st->guard);
}
else
st->timeout[i] = 0;
}
vcos_semaphore_post(&st->done);
}
vcos_thread_exit(NULL);
return NULL;
}
/**
* buffer header callback function for video
*
* @param port Pointer to port from which callback originated
* @param buffer mmal buffer header pointer
*/
static void video_buffer_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
MMAL_BUFFER_HEADER_T *new_buffer;
RASPIVID_STATE * state = (RASPIVID_STATE *)port->userdata;
if (state)
{
if (state->finished) {
vcos_semaphore_post(&state->capture_done_sem);
return;
}
if (buffer->length)
{
mmal_buffer_header_mem_lock(buffer);
//
// *** PR : OPEN CV Stuff here !
//
int w=state->width; // get image size
int h=state->height;
int pixelSize = state->monochrome ? 1 : 3;
memcpy(state->dstImage->imageData,buffer->data,w*h*pixelSize);
vcos_semaphore_post(&state->capture_done_sem);
vcos_semaphore_wait(&state->capture_sem);
mmal_buffer_header_mem_unlock(buffer);
}
else
{
vcos_log_error("buffer null");
}
}
else
{
vcos_log_error("Received a encoder buffer callback with no state");
}
// release buffer back to the pool
mmal_buffer_header_release(buffer);
// and send one back to the port (if still open)
if (port->is_enabled)
{
MMAL_STATUS_T status;
new_buffer = mmal_queue_get(state->video_pool->queue);
if (new_buffer)
status = mmal_port_send_buffer(port, new_buffer);
if (!new_buffer || status != MMAL_SUCCESS)
vcos_log_error("Unable to return a buffer to the encoder port");
}
}
void raspiCamCvReleaseCapture(RaspiCamCvCapture ** capture)
{
RASPIVID_STATE * state = (*capture)->pState;
// Unblock the the callback.
state->finished = 1;
vcos_semaphore_post(&state->capture_sem);
vcos_semaphore_wait(&state->capture_done_sem);
vcos_semaphore_delete(&state->capture_sem);
vcos_semaphore_delete(&state->capture_done_sem);
if (state->camera_component)
mmal_component_disable(state->camera_component);
destroy_camera_component(state);
cvReleaseImage(&state->pu);
if (state->graymode==0) {
cvReleaseImage(&state->pv);
cvReleaseImage(&state->py);
}
if (state->graymode==0) {
cvReleaseImage(&state->pu_big);
cvReleaseImage(&state->pv_big);
cvReleaseImage(&state->yuvImage);
cvReleaseImage(&state->dstImage);
}
free(state);
free(*capture);
*capture = 0;
}
/** Wrapper function around the real thread function. Posts the semaphore
* when completed.
*/
static int vcos_thread_wrapper(void *arg)
{
void *ret;
VCOS_THREAD_T *thread = arg;
vcos_assert(thread->magic == VCOS_THREAD_MAGIC);
thread->thread.thread = current;
vcos_add_thread(thread);
#ifdef VCOS_WANT_TLS_EMULATION
vcos_tls_thread_register(&thread->_tls);
#endif
if (thread->legacy)
{
LEGACY_ENTRY_FN_T fn = (LEGACY_ENTRY_FN_T)thread->entry;
fn(0,thread->arg);
ret = 0;
}
else
{
ret = thread->entry(thread->arg);
}
thread->exit_data = ret;
vcos_remove_thread(current);
/* For join and cleanup */
vcos_semaphore_post(&thread->wait);
return 0;
}
/** Callback from video decode output port. */
static void svp_bh_output_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buf)
{
SVP_T *svp = (SVP_T *)port->userdata;
if (buf->length == 0)
{
LOG_TRACE("%s: zero-length buffer => EOS", port->name);
svp_set_stop(svp, SVP_STOP_EOS); // This shouldn't be necessary, but it is ...
mmal_buffer_header_release(buf);
}
else if (buf->data == NULL)
{
LOG_ERROR("%s: zero buffer handle", port->name);
mmal_buffer_header_release(buf);
}
else
{
/* Reset watchdog timer */
vcos_timer_set(&svp->wd_timer, SVP_WATCHDOG_TIMEOUT_MS);
/* Enqueue the decoded frame so we can return quickly to MMAL core */
mmal_queue_put(svp->queue, buf);
}
/* Notify worker */
vcos_semaphore_post(&svp->sema);
}
/** Callback from a control port. */
static void svp_bh_control_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buf)
{
SVP_T *svp = (SVP_T *)port->userdata;
switch (buf->cmd)
{
case MMAL_EVENT_EOS:
LOG_TRACE("%s: EOS", port->name);
svp_set_stop(svp, SVP_STOP_EOS);
break;
case MMAL_EVENT_ERROR:
LOG_ERROR("%s: MMAL error: %s", port->name,
mmal_status_to_string(*(MMAL_STATUS_T *)buf->data));
svp_set_stop(svp, SVP_STOP_ERROR);
break;
default:
LOG_TRACE("%s: buf %p, event %4.4s", port->name, buf, (char *)&buf->cmd);
break;
}
mmal_buffer_header_release(buf);
vcos_semaphore_post(&svp->sema);
}
static void vcos_thread_wrapper(int argc, void *arg)
#endif
{
int i;
void *ret;
VCOS_THREAD_T *thread = (VCOS_THREAD_T *)arg;
vcos_assert(thread->magic == VCOS_THREAD_MAGIC);
#ifdef VCOS_WANT_TLS_EMULATION
vcos_tls_thread_register(&thread->_tls);
#endif
if (thread->legacy)
{
LEGACY_ENTRY_FN_T fn = (LEGACY_ENTRY_FN_T)thread->entry;
fn(0,thread->arg);
ret = 0;
}
else
{
ret = thread->entry(thread->arg);
}
// call termination functions
for (i=0; i<VCOS_MAX_EXIT_HANDLERS; i++)
{
if (thread->at_exit[i].pfn) {
thread->at_exit[i].pfn(thread->at_exit[i].cxt);
}
}
thread->exit_data = ret;
vcos_semaphore_post(&thread->wait);
}
/** Callback to receive stop notification. Sets quit flag and posts semaphore.
* @param ctx VIDTEX_T instance. Declared as void * in order to use as SVP callback.
* @param stop_reason SVP stop reason.
*/
static void vidtex_stop_cb(void *ctx, uint32_t stop_reason)
{
VIDTEX_T *vt = ctx;
vt->stop_reason = stop_reason;
vidtex_set_quit(vt, true);
vcos_semaphore_post(&vt->sem_decoded);
}
/**
* buffer header callback function for encoder
*
* Callback will dump buffer data to the specific file
*
* @param port Pointer to port from which callback originated
* @param buffer mmal buffer header pointer
*/
static void encoder_buffer_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
int complete = 0;
// We pass our file handle and other stuff in via the userdata field.
PORT_USERDATA *pData = (PORT_USERDATA *)port->userdata;
if (pData)
{
int bytes_written = buffer->length;
if (buffer->length && pData->file_handle)
{
mmal_buffer_header_mem_lock(buffer);
bytes_written = fwrite(buffer->data, 1, buffer->length, pData->file_handle);
mmal_buffer_header_mem_unlock(buffer);
}
// We need to check we wrote what we wanted - it's possible we have run out of storage.
if (bytes_written != buffer->length)
{
vcos_log_error("Unable to write buffer to file - aborting");
complete = 1;
}
// Now flag if we have completed
if (buffer->flags & (MMAL_BUFFER_HEADER_FLAG_FRAME_END | MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED))
complete = 1;
}
else
{
vcos_log_error("Received a encoder buffer callback with no state");
}
// release buffer back to the pool
mmal_buffer_header_release(buffer);
// and send one back to the port (if still open)
if (port->is_enabled)
{
MMAL_STATUS_T status = MMAL_SUCCESS;
MMAL_BUFFER_HEADER_T *new_buffer;
new_buffer = mmal_queue_get(pData->pstate->encoder_pool->queue);
if (new_buffer)
{
status = mmal_port_send_buffer(port, new_buffer);
}
if (!new_buffer || status != MMAL_SUCCESS)
vcos_log_error("Unable to return a buffer to the encoder port");
}
if (complete)
vcos_semaphore_post(&(pData->complete_semaphore));
}
/** Return a waiter to the pool.
*/
static void release_waiter(MMAL_CLIENT_T *client, MMAL_WAITER_T *waiter)
{
LOG_TRACE("at %p", waiter);
vcos_assert(waiter);
vcos_assert(waiter->inuse);
waiter->inuse = 0;
vcos_semaphore_post(&client->waitpool.sem);
}
/** Watchdog timer callback - stops playback */
static void svp_watchdog_cb(void *ctx)
{
SVP_T *svp = ctx;
LOG_ERROR("%s: no frames received for %d ms, aborting", svp->video_output->name,
SVP_WATCHDOG_TIMEOUT_MS);
svp_set_stop(svp, SVP_STOP_ERROR);
vcos_semaphore_post(&svp->sema);
}
IplImage * raspiCamCvQueryFrame(RaspiCamCvCapture * capture)
{
RASPIVID_STATE * state = capture->pState;
vcos_semaphore_post(&state->capture_sem);
vcos_semaphore_wait(&state->capture_done_sem);
return state->dstImage;
}
static void waiter_deinit(WAITER_T *waiter, int *passed)
{
waiter->quit = 1;
vcos_semaphore_post(&waiter->go);
vcos_thread_join(&waiter->thread,NULL);
vcos_semaphore_delete(&waiter->go);
vcos_semaphore_delete(&waiter->done);
}
/** Callback from the input port.
* Buffer has been consumed and is available to be used again. */
static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
struct CONTEXT_T *ctx = (struct CONTEXT_T *)port->userdata;
/* The decoder is done with the data, just recycle the buffer header into its pool */
mmal_buffer_header_release(buffer);
/* Kick the processing thread */
vcos_semaphore_post(&ctx->semaphore);
}
/** Callback from the output port.
* Buffer has been produced by the port and is available for processing. */
static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
struct CONTEXT_T *ctx = (struct CONTEXT_T *)port->userdata;
/* Queue the decoded video frame */
mmal_queue_put(ctx->queue, buffer);
/* Kick the processing thread */
vcos_semaphore_post(&ctx->semaphore);
}
static void guard_deinit(GUARD_T *guard, int *passed)
{
guard->quit = 1;
vcos_semaphore_post(&guard->go);
vcos_thread_join(&guard->thread,0);
vcos_semaphore_delete(&guard->go);
vcos_semaphore_delete(&guard->done);
vcos_event_flags_delete(&guard->event);
}
static OMX_ERRORTYPE vcil_out_ComponentTunnelRequest(OMX_IN OMX_HANDLETYPE hComponent,
OMX_IN OMX_U32 nPort,
OMX_IN OMX_HANDLETYPE hTunneledComp,
OMX_IN OMX_U32 nTunneledPort,
OMX_INOUT OMX_TUNNELSETUPTYPE* pTunnelSetup)
{
OMX_COMPONENTTYPE *pComp = (OMX_COMPONENTTYPE *) hComponent;
VC_PRIVATE_COMPONENT_T *comp;
IL_TUNNEL_REQUEST_EXECUTE_T exe;
IL_TUNNEL_REQUEST_RESPONSE_T resp;
VC_PRIVATE_COMPONENT_T *list;
ILCS_COMMON_T *st;
int rlen = sizeof(resp);
if(!pComp)
return OMX_ErrorBadParameter;
st = pComp->pApplicationPrivate;
comp = (VC_PRIVATE_COMPONENT_T *) pComp->pComponentPrivate;
exe.reference = comp->reference;
exe.port = nPort;
exe.tunnel_port = nTunneledPort;
if (pTunnelSetup)
exe.setup = *pTunnelSetup;
// the other component may be on the host or on VC. Look through our list
// so we can tell, and tell ILCS on VC the details.
vcos_semaphore_wait(&st->component_lock);
list = st->component_list;
while (list != NULL && list->comp != (void *) hTunneledComp)
list = list->next;
vcos_semaphore_post(&st->component_lock);
if (list == NULL)
{
exe.tunnel_ref = hTunneledComp;
exe.tunnel_host = OMX_TRUE;
}
else
{
exe.tunnel_ref = list->reference;
exe.tunnel_host = OMX_FALSE;
}
if(ilcs_execute_function(st->ilcs, IL_COMPONENT_TUNNEL_REQUEST, &exe, sizeof(exe), &resp, &rlen) < 0 || rlen != sizeof(resp))
return OMX_ErrorHardware;
if (pTunnelSetup)
*pTunnelSetup = resp.setup;
return resp.err;
}
// Called by OMX when the encoder component has filled
// the output buffer with H.264 encoded video data
static OMX_ERRORTYPE fill_output_buffer_done_handler(
OMX_HANDLETYPE hComponent,
OMX_PTR pAppData,
OMX_BUFFERHEADERTYPE* pBuffer) {
appctx *ctx = ((appctx*)pAppData);
vcos_semaphore_wait(&ctx->handler_lock);
// The main loop can now flush the buffer to output file
ctx->encoder_output_buffer_available = 1;
vcos_semaphore_post(&ctx->handler_lock);
return OMX_ErrorNone;
}
static OMX_ERRORTYPE vcil_out_ComponentDeInit(OMX_IN OMX_HANDLETYPE hComponent)
{
OMX_COMPONENTTYPE *pComp = (OMX_COMPONENTTYPE *) hComponent;
VC_PRIVATE_COMPONENT_T *comp;
IL_EXECUTE_HEADER_T exe;
IL_RESPONSE_HEADER_T resp;
ILCS_COMMON_T *st;
int rlen = sizeof(resp);
if(!pComp)
return OMX_ErrorBadParameter;
st = pComp->pApplicationPrivate;
comp = (VC_PRIVATE_COMPONENT_T *) pComp->pComponentPrivate;
exe.reference = comp->reference;
if(ilcs_execute_function(st->ilcs, IL_COMPONENT_DEINIT, &exe, sizeof(exe), &resp, &rlen) < 0 || rlen != sizeof(resp) ||
resp.err == OMX_ErrorNone)
{
// remove from list, assuming that we successfully managed to deinit
// this component, or that ilcs has returned an error. The assumption
// here is that if the component has managed to correctly signal an
// error, it still exists, but if the transport has failed then we might
// as well try and cleanup
VC_PRIVATE_COMPONENT_T *list, *prev;
vcos_semaphore_wait(&st->component_lock);
list = st->component_list;
prev = NULL;
while (list != NULL && list != comp)
{
prev = list;
list = list->next;
}
// failing to find this component is not a good sign.
if(vcos_verify(list))
{
if (prev == NULL)
st->component_list = list->next;
else
prev->next = list->next;
}
vcos_semaphore_post(&st->component_lock);
vcos_free(comp);
}
return resp.err;
}
/** Callback to receive decoded video frame */
static void vidtex_video_frame_cb(void *ctx, void *ob)
{
if (ob)
{
VIDTEX_T *vt = ctx;
/* coverity[missing_lock] Coverity gets confused by the semaphore locking scheme */
vt->video_frame = ob;
vcos_semaphore_post(&vt->sem_decoded);
vcos_semaphore_wait(&vt->sem_drawn);
vt->video_frame = NULL;
}
}
/**
* buffer header callback function for camera output port
*
* Callback will dump buffer data to the specific file
*
* @param port Pointer to port from which callback originated
* @param buffer mmal buffer header pointer
*/
static void camera_buffer_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
int complete = 0;
// We pass our file handle and other stuff in via the userdata field.
PORT_USERDATA *pData = (PORT_USERDATA *)port->userdata;
if (pData)
{
if (buffer->length)
{
mmal_buffer_header_mem_lock(buffer);
int i;
for( i = 0; i < buffer->length; i++ )
pData->data_dump[i] = buffer->data[i];
mmal_buffer_header_mem_unlock(buffer);
}
// Check end of frame or error
if (buffer->flags & (MMAL_BUFFER_HEADER_FLAG_FRAME_END | MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED))
complete = 1;
}
else
{
vcos_log_error("Received a camera still buffer callback with no state");
}
// release buffer back to the pool
mmal_buffer_header_release(buffer);
// and send one back to the port (if still open)
if (port->is_enabled)
{
MMAL_STATUS_T status;
MMAL_BUFFER_HEADER_T *new_buffer = mmal_queue_get(pData->pstate->camera_pool->queue);
// and back to the port from there.
if (new_buffer)
{
status = mmal_port_send_buffer(port, new_buffer);
}
if (!new_buffer || status != MMAL_SUCCESS)
vcos_log_error("Unable to return the buffer to the camera still port");
}
if (complete)
{
vcos_semaphore_post(&(pData->complete_semaphore));
}
}
/** Put a MMAL_BUFFER_HEADER_T back at the start of a QUEUE. */
void mmal_queue_put_back(MMAL_QUEUE_T *queue, MMAL_BUFFER_HEADER_T *buffer)
{
if(!queue || !buffer) return;
vcos_mutex_lock(&queue->lock);
mmal_queue_sanity_check(queue, buffer);
queue->length++;
buffer->next = queue->first;
queue->first = buffer;
if(queue->last == &queue->first) queue->last = &buffer->next;
vcos_semaphore_post(&queue->semaphore);
vcos_mutex_unlock(&queue->lock);
}
static void block_until_flushed(appctx *ctx) {
int quit;
while(!quit) {
vcos_semaphore_wait(&ctx->handler_lock);
if(ctx->flushed) {
ctx->flushed = 0;
quit = 1;
}
vcos_semaphore_post(&ctx->handler_lock);
if(!quit) {
usleep(10000);
}
}
}
static void graph_connection_cb(MMAL_CONNECTION_T *connection)
{
MMAL_GRAPH_PRIVATE_T *graph = (MMAL_GRAPH_PRIVATE_T *)connection->user_data;
MMAL_BUFFER_HEADER_T *buffer;
if (connection->flags == MMAL_CONNECTION_FLAG_DIRECT &&
(buffer = mmal_queue_get(connection->queue)) != NULL)
{
graph_process_buffer(graph, connection, buffer);
return;
}
vcos_semaphore_post(&graph->sema);
}
// OMX calls this handler for all the events it emits
static OMX_ERRORTYPE event_handler(
OMX_HANDLETYPE hComponent,
OMX_PTR pAppData,
OMX_EVENTTYPE eEvent,
OMX_U32 nData1,
OMX_U32 nData2,
OMX_PTR pEventData) {
dump_event(hComponent, eEvent, nData1, nData2);
appctx *ctx = (appctx *)pAppData;
switch(eEvent) {
case OMX_EventCmdComplete:
vcos_semaphore_wait(&ctx->handler_lock);
if(nData1 == OMX_CommandFlush) {
ctx->flushed = 1;
}
vcos_semaphore_post(&ctx->handler_lock);
break;
case OMX_EventParamOrConfigChanged:
vcos_semaphore_wait(&ctx->handler_lock);
if(nData2 == OMX_IndexParamCameraDeviceNumber) {
ctx->camera_ready = 1;
}
vcos_semaphore_post(&ctx->handler_lock);
break;
case OMX_EventError:
omx_die(nData1, "error event received");
break;
default:
break;
}
return OMX_ErrorNone;
}
IplImage * raspiCamCvQueryFrame_New_Final(RaspiCamCvCapture * capture) {
RASPIVID_STATE * state = capture->pState;
vcos_semaphore_post(&state->capture_sem);
vcos_semaphore_wait(&state->capture_done_sem);
cvResize(state->pu, state->pu_big, CV_INTER_NN);
cvResize(state->pv, state->pv_big, CV_INTER_NN); //CV_INTER_LINEAR looks better but it's slower
//cvResize(state->pu, state->pu_big, CV_INTER_AREA);
//cvResize(state->pv, state->pv_big, CV_INTER_AREA);
cvMerge(state->py, state->pu_big, state->pv_big, NULL, state->yuvImage);
//cvMerge(state->py, state->pu, state->pv, NULL, state->yuvImage);
//cvCvtColor(state->yuvImage,state->dstImage,CV_YCrCb2RGB); // convert in RGB color space (slow)
return state->yuvImage;
}
/**
* <DFN>vc_hdcp2_service_send_command</DFN> sends a command which has no reply to Videocore
* side HDCP2 service.
*
* @param client_handle is the vchi client handle
*
* @param sema is the locking semaphore to protect the buffer
*
* @param command is the command (VC_HDCP2_CMD_CODE_T in vc_hdcp2service_defs.h)
*
* @param buffer is the command buffer to be sent
*
* @param length is the size of buffer in bytes
*
* @return zero if successful, VCHI error code if failed
*/
int32_t vc_hdcp2_service_send_command(VCHI_SERVICE_HANDLE_T client_handle,
VCOS_SEMAPHORE_T *sema,
uint32_t command, void *buffer, uint32_t length) {
VCHI_MSG_VECTOR_T vector[] = { {&command, sizeof(command)},
{buffer, length} };
VCOS_STATUS_T status;
int32_t success = 0;
vcos_assert(sema);
status = vcos_semaphore_wait(sema);
vcos_assert(status == VCOS_SUCCESS);
success = vchi_msg_queuev( client_handle, vector, sizeof(vector)/sizeof(vector[0]),
VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL );
status = vcos_semaphore_post(sema);
vcos_assert(status == VCOS_SUCCESS);
return success;
}
/**
* buffer header callback function for camera output port
*
* Callback will dump buffer data to the specific file
*
* @param port Pointer to port from which callback originated
* @param buffer mmal buffer header pointer
*/
static void camera_buffer_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
MMAL_STATUS_T status;
// We pass our file handle and other stuff in via the userdata field.
PORT_USERDATA *pData = (PORT_USERDATA *)port->userdata;
if (pData)
{
if (buffer->length)
{
mmal_buffer_header_mem_lock(buffer);
fwrite(buffer->data, 1, buffer->length, pData->file_handle);
mmal_buffer_header_mem_unlock(buffer);
}
// What about error conditions?
if (buffer->flags & (MMAL_BUFFER_HEADER_FLAG_FRAME_END | MMAL_BUFFER_HEADER_FLAG_EOS | MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED))
{
vcos_semaphore_post(&(pData->complete_semaphore));
}
}
else
{
vcos_log_error("Received a camera still buffer callback with no state");
}
// release buffer back to the pool
mmal_buffer_header_release(buffer);
// and send one back to the port (if still open)
if (port->is_enabled)
{
MMAL_BUFFER_HEADER_T *new_buffer = mmal_queue_get(pData->pstate->camera_pool->queue);
// and back to the port from there.
status = mmal_port_send_buffer(port, new_buffer);
if (status != MMAL_SUCCESS)
vcos_log_error("Unable to return the buffer to the camera still port");
}
}
static _VCOS_INLINE
void vcos_msg_send_helper(VCOS_MSGQUEUE_T *src,
VCOS_MSGQUEUE_T *dest,
uint32_t code,
VCOS_MSG_T *msg)
{
vcos_assert(msg);
vcos_assert(dest);
msg->code = code;
msg->dst = dest;
msg->src = src;
msg->next = NULL;
msg->src_thread = vcos_thread_current();
msgq_append(dest, msg);
vcos_semaphore_post(&dest->sem);
}
/**
* Writes the next GL frame-buffer to a RAW .ppm formatted file
* using the specified file-handle.
* @param state Pointer to the GL preview state.
* @param outpt_file Output file handle for the ppm image.
* @return Zero on success.
*/
int raspitex_capture(RASPITEX_STATE *state, FILE *output_file)
{
int rc = 0;
uint8_t *buffer = NULL;
size_t size = 0;
vcos_log_trace("%s: state %p file %p", VCOS_FUNCTION,
state, output_file);
if (state && output_file)
{
/* Only request one capture at a time */
vcos_semaphore_wait(&state->capture.start_sem);
state->capture.request = 1;
/* Wait for capture to start */
vcos_semaphore_wait(&state->capture.completed_sem);
/* Take ownership of the captured buffer */
buffer = state->capture.buffer;
size = state->capture.size;
state->capture.request = 0;
state->capture.buffer = 0;
state->capture.size = 0;
/* Allow another capture to be requested */
vcos_semaphore_post(&state->capture.start_sem);
}
if (size == 0 || ! buffer)
{
vcos_log_error("%s: capture failed", VCOS_FUNCTION);
rc = -1;
goto end;
}
raspitexutil_brga_to_rgba(buffer, size);
rc = write_tga(output_file, state->width, state->height, buffer, size);
fflush(output_file);
end:
free(buffer);
return rc;
}
