Producer.cpp

/* Copyright 1999, Be Incorporated. All Rights Reserved. This file may be used under the terms of the Be Sample Code License. */ #include <fcntl.h> #include <malloc.h> #include <math.h> #include <stdio.h> #include <string.h> #include <sys/uio.h> #include <unistd.h> #include <Buffer.h> #include <BufferGroup.h> #include <ParameterWeb.h> #include <TimeSource.h> #include <Autolock.h> #include <Debug.h> #define TOUCH(x) ((void)(x)) #define PRINTF(a,b) \ do { \ if (a < 2) { \ printf("VideoProducer::"); \ printf b; \ } \ } while (0) #include "Producer.h" #define FIELD_RATE 30.f VideoProducer::VideoProducer( BMediaAddOn *addon, const char *name, int32 internal_id) : BMediaNode(name), BMediaEventLooper(), BBufferProducer(B_MEDIA_RAW_VIDEO), BControllable() { fInitStatus = B_NO_INIT; fInternalID = internal_id; fAddOn = addon; fBufferGroup = NULL; fThread = -1; fFrameSync = -1; fProcessingLatency = 0LL; fRunning = false; fConnected = false; fEnabled = false; fOutput.destination = media_destination::null; fInitStatus = B_OK; return; } VideoProducer::~VideoProducer() { if (fInitStatus == B_OK) { /* Clean up after ourselves, in case the application didn't make us * do so. */ if (fConnected) Disconnect(fOutput.source, fOutput.destination); if (fRunning) HandleStop(); } } /* BMediaNode */ port_id VideoProducer::ControlPort() const { return BMediaNode::ControlPort(); } BMediaAddOn * VideoProducer::AddOn(int32 *internal_id) const { if (internal_id) *internal_id = fInternalID; return fAddOn; } status_t VideoProducer::HandleMessage(int32 message, const void *data, size_t size) { return B_ERROR; } void VideoProducer::Preroll() { /* This hook may be called before the node is started to give the hardware * a chance to start. */ } void VideoProducer::SetTimeSource(BTimeSource *time_source) { /* Tell frame generation thread to recalculate delay value */ release_sem(fFrameSync); } status_t VideoProducer::RequestCompleted(const media_request_info &info) { return BMediaNode::RequestCompleted(info); } /* BMediaEventLooper */ void VideoProducer::NodeRegistered() { if (fInitStatus != B_OK) { ReportError(B_NODE_IN_DISTRESS); return; } /* Set up the parameter web */ BParameterWeb *web = new BParameterWeb(); BParameterGroup *main = web->MakeGroup(Name()); BDiscreteParameter *state = main->MakeDiscreteParameter( P_COLOR, B_MEDIA_RAW_VIDEO, "Color", "Color"); state->AddItem(B_HOST_TO_LENDIAN_INT32(0xff000000), "Block"); state->AddItem(B_HOST_TO_LENDIAN_INT32(0x00ff0000), "Red"); state->AddItem(B_HOST_TO_LENDIAN_INT32(0x0000ff00), "Green"); state->AddItem(B_HOST_TO_LENDIAN_INT32(0x000000ff), "Blue"); fColor = B_HOST_TO_LENDIAN_INT32(0x00ff0000); fLastColorChange = system_time(); /* After this call, the BControllable owns the BParameterWeb object and * will delete it for you */ SetParameterWeb(web); fOutput.node = Node(); fOutput.source.port = ControlPort(); fOutput.source.id = 0; fOutput.destination = media_destination::null; strcpy(fOutput.name, Name()); /* Tailor these for the output of your device */ fOutput.format.type = B_MEDIA_RAW_VIDEO; fOutput.format.u.raw_video = media_raw_video_format::wildcard; fOutput.format.u.raw_video.interlace = 1; fOutput.format.u.raw_video.display.format = B_RGB32; /* Start the BMediaEventLooper control loop running */ Run(); } void VideoProducer::Start(bigtime_t performance_time) { BMediaEventLooper::Start(performance_time); } void VideoProducer::Stop(bigtime_t performance_time, bool immediate) { BMediaEventLooper::Stop(performance_time, immediate); } void VideoProducer::Seek(bigtime_t media_time, bigtime_t performance_time) { BMediaEventLooper::Seek(media_time, performance_time); } void VideoProducer::TimeWarp(bigtime_t at_real_time, bigtime_t to_performance_time) { BMediaEventLooper::TimeWarp(at_real_time, to_performance_time); } status_t VideoProducer::AddTimer(bigtime_t at_performance_time, int32 cookie) { return BMediaEventLooper::AddTimer(at_performance_time, cookie); } void VideoProducer::SetRunMode(run_mode mode) { BMediaEventLooper::SetRunMode(mode); } void VideoProducer::HandleEvent(const media_timed_event *event, bigtime_t lateness, bool realTimeEvent) { TOUCH(lateness); TOUCH(realTimeEvent); switch(event->type) { case BTimedEventQueue::B_START: HandleStart(event->event_time); break; case BTimedEventQueue::B_STOP: HandleStop(); break; case BTimedEventQueue::B_WARP: HandleTimeWarp(event->bigdata); break; case BTimedEventQueue::B_SEEK: HandleSeek(event->bigdata); break; case BTimedEventQueue::B_HANDLE_BUFFER: case BTimedEventQueue::B_DATA_STATUS: case BTimedEventQueue::B_PARAMETER: default: PRINTF(-1, ("HandleEvent: Unhandled event -- %lx\n", event->type)); break; } } void VideoProducer::CleanUpEvent(const media_timed_event *event) { BMediaEventLooper::CleanUpEvent(event); } bigtime_t VideoProducer::OfflineTime() { return BMediaEventLooper::OfflineTime(); } void VideoProducer::ControlLoop() { BMediaEventLooper::ControlLoop(); } status_t VideoProducer::DeleteHook(BMediaNode * node) { return BMediaEventLooper::DeleteHook(node); } /* BBufferProducer */ status_t VideoProducer::FormatSuggestionRequested( media_type type, int32 quality, media_format *format) { if (type != B_MEDIA_ENCODED_VIDEO) return B_MEDIA_BAD_FORMAT; TOUCH(quality); if (fOutput.format.u.raw_video.display.line_width == 0) fOutput.format.u.raw_video.display.line_width = 320; if (fOutput.format.u.raw_video.display.line_count == 0) fOutput.format.u.raw_video.display.line_count = 240; if (fOutput.format.u.raw_video.field_rate == 0) fOutput.format.u.raw_video.field_rate = 29.97f; *format = fOutput.format; return B_OK; } status_t VideoProducer::FormatProposal(const media_source &output, media_format *format) { status_t err; if (!format) return B_BAD_VALUE; if (output != fOutput.source) return B_MEDIA_BAD_SOURCE; err = format_is_compatible(*format, fOutput.format) ? B_OK : B_MEDIA_BAD_FORMAT; *format = fOutput.format; return err; } status_t VideoProducer::FormatChangeRequested(const media_source &source, const media_destination &destination, media_format *io_format, int32 *_deprecated_) { TOUCH(destination); TOUCH(io_format); TOUCH(_deprecated_); if (source != fOutput.source) return B_MEDIA_BAD_SOURCE; return B_ERROR; } status_t VideoProducer::GetNextOutput(int32 *cookie, media_output *out_output) { if (!out_output) return B_BAD_VALUE; if ((*cookie) != 0) return B_BAD_INDEX; *out_output = fOutput; (*cookie)++; return B_OK; } status_t VideoProducer::DisposeOutputCookie(int32 cookie) { TOUCH(cookie); return B_OK; } status_t VideoProducer::SetBufferGroup(const media_source &for_source, BBufferGroup *group) { TOUCH(for_source); TOUCH(group); return B_ERROR; } status_t VideoProducer::VideoClippingChanged(const media_source &for_source, int16 num_shorts, int16 *clip_data, const media_video_display_info &display, int32 *_deprecated_) { TOUCH(for_source); TOUCH(num_shorts); TOUCH(clip_data); TOUCH(display); TOUCH(_deprecated_); return B_ERROR; } status_t VideoProducer::GetLatency(bigtime_t *out_latency) { *out_latency = EventLatency() + SchedulingLatency(); return B_OK; } status_t VideoProducer::PrepareToConnect(const media_source &source, const media_destination &destination, media_format *format, media_source *out_source, char *out_name) { PRINTF(1, ("PrepareToConnect() %ldx%ld\n", \ format->u.raw_video.display.line_width, \ format->u.raw_video.display.line_count)); if (fConnected) { PRINTF(0, ("PrepareToConnect: Already connected\n")); return EALREADY; } if (source != fOutput.source) return B_MEDIA_BAD_SOURCE; if (fOutput.destination != media_destination::null) return B_MEDIA_ALREADY_CONNECTED; /* The format parameter comes in with the suggested format, and may be * specialized as desired by the node */ if (!format_is_compatible(*format, fOutput.format)) { *format = fOutput.format; return B_MEDIA_BAD_FORMAT; } if (format->u.raw_video.display.line_width == 0) format->u.raw_video.display.line_width = 320; if (format->u.raw_video.display.line_count == 0) format->u.raw_video.display.line_count = 240; if (format->u.raw_video.field_rate == 0) format->u.raw_video.field_rate = 29.97f; *out_source = fOutput.source; strcpy(out_name, fOutput.name); fOutput.destination = destination; return B_OK; } void VideoProducer::Connect(status_t error, const media_source &source, const media_destination &destination, const media_format &format, char *io_name) { PRINTF(1, ("Connect() %ldx%ld\n", \ format.u.raw_video.display.line_width, \ format.u.raw_video.display.line_count)); if (fConnected) { PRINTF(0, ("Connect: Already connected\n")); return; } if ( (source != fOutput.source) || (error < B_OK) || !const_cast<media_format *>(&format)->Matches(&fOutput.format)) { PRINTF(1, ("Connect: Connect error\n")); return; } fOutput.destination = destination; strcpy(io_name, fOutput.name); if (fOutput.format.u.raw_video.field_rate != 0.0f) { fPerformanceTimeBase = fPerformanceTimeBase + (bigtime_t) ((fFrame - fFrameBase) * (1000000 / fOutput.format.u.raw_video.field_rate)); fFrameBase = fFrame; } fConnectedFormat = format.u.raw_video; /* get the latency */ bigtime_t latency = 0; media_node_id tsID = 0; FindLatencyFor(fOutput.destination, &latency, &tsID); #define NODE_LATENCY 1000 SetEventLatency(latency + NODE_LATENCY); uint32 *buffer, *p, f = 3; p = buffer = (uint32 *)malloc(4 * fConnectedFormat.display.line_count * fConnectedFormat.display.line_width); if (!buffer) { PRINTF(0, ("Connect: Out of memory\n")); return; } bigtime_t now = system_time(); for (int y = 0; y < (int)fConnectedFormat.display.line_count; y++) for (int x = 0; x < (int)fConnectedFormat.display.line_width; x++) *(p++) = ((((x+y)^0^x)+f) & 0xff) * (0x01010101 & fColor); fProcessingLatency = system_time() - now; free(buffer); /* Create the buffer group */ fBufferGroup = new BBufferGroup(4 * fConnectedFormat.display.line_width * fConnectedFormat.display.line_count, 8); if (fBufferGroup->InitCheck() < B_OK) { delete fBufferGroup; fBufferGroup = NULL; return; } fConnected = true; fEnabled = true; /* Tell frame generation thread to recalculate delay value */ release_sem(fFrameSync); } void VideoProducer::Disconnect(const media_source &source, const media_destination &destination) { PRINTF(1, ("Disconnect()\n")); if (!fConnected) { PRINTF(0, ("Disconnect: Not connected\n")); return; } if ((source != fOutput.source) || (destination != fOutput.destination)) { PRINTF(0, ("Disconnect: Bad source and/or destination\n")); return; } fEnabled = false; fOutput.destination = media_destination::null; fLock.Lock(); delete fBufferGroup; fBufferGroup = NULL; fLock.Unlock(); fConnected = false; } void VideoProducer::LateNoticeReceived(const media_source &source, bigtime_t how_much, bigtime_t performance_time) { TOUCH(source); TOUCH(how_much); TOUCH(performance_time); } void VideoProducer::EnableOutput(const media_source &source, bool enabled, int32 *_deprecated_) { TOUCH(_deprecated_); if (source != fOutput.source) return; fEnabled = enabled; } status_t VideoProducer::SetPlayRate(int32 numer, int32 denom) { TOUCH(numer); TOUCH(denom); return B_ERROR; } void VideoProducer::AdditionalBufferRequested(const media_source &source, media_buffer_id prev_buffer, bigtime_t prev_time, const media_seek_tag *prev_tag) { TOUCH(source); TOUCH(prev_buffer); TOUCH(prev_time); TOUCH(prev_tag); } void VideoProducer::LatencyChanged(const media_source &source, const media_destination &destination, bigtime_t new_latency, uint32 flags) { TOUCH(source); TOUCH(destination); TOUCH(new_latency); TOUCH(flags); } /* BControllable */ status_t VideoProducer::GetParameterValue( int32 id, bigtime_t *last_change, void *value, size_t *size) { if (id != P_COLOR) return B_BAD_VALUE; *last_change = fLastColorChange; *size = sizeof(uint32); *((uint32 *)value) = fColor; return B_OK; } void VideoProducer::SetParameterValue( int32 id, bigtime_t when, const void *value, size_t size) { if ((id != P_COLOR) || !value || (size != sizeof(uint32))) return; if (*(uint32 *)value == fColor) return; fColor = *(uint32 *)value; fLastColorChange = when; BroadcastNewParameterValue( fLastColorChange, P_COLOR, &fColor, sizeof(fColor)); } status_t VideoProducer::StartControlPanel(BMessenger *out_messenger) { return BControllable::StartControlPanel(out_messenger); } /* VideoProducer */ void VideoProducer::HandleStart(bigtime_t performance_time) { /* Start producing frames, even if the output hasn't been connected yet. */ PRINTF(1, ("HandleStart(%Ld)\n", performance_time)); if (fRunning) { PRINTF(-1, ("HandleStart: Node already started\n")); return; } fFrame = 0; fFrameBase = 0; fPerformanceTimeBase = performance_time; fFrameSync = create_sem(0, "frame synchronization"); if (fFrameSync < B_OK) goto err1; fThread = spawn_thread(_frame_generator_, "frame generator", B_NORMAL_PRIORITY, this); if (fThread < B_OK) goto err2; resume_thread(fThread); fRunning = true; return; err2: delete_sem(fFrameSync); err1: return; } void VideoProducer::HandleStop(void) { PRINTF(1, ("HandleStop()\n")); if (!fRunning) { PRINTF(-1, ("HandleStop: Node isn't running\n")); return; } delete_sem(fFrameSync); wait_for_thread(fThread, &fThread); fRunning = false; } void VideoProducer::HandleTimeWarp(bigtime_t performance_time) { fPerformanceTimeBase = performance_time; fFrameBase = fFrame; /* Tell frame generation thread to recalculate delay value */ release_sem(fFrameSync); } void VideoProducer::HandleSeek(bigtime_t performance_time) { fPerformanceTimeBase = performance_time; fFrameBase = fFrame; /* Tell frame generation thread to recalculate delay value */ release_sem(fFrameSync); } /* The following functions form the thread that generates frames. You should * replace this with the code that interfaces to your hardware. */ int32 VideoProducer::FrameGenerator() { bigtime_t wait_until = system_time(); while (1) { status_t err = acquire_sem_etc(fFrameSync, 1, B_ABSOLUTE_TIMEOUT, wait_until); /* The only acceptable responses are B_OK and B_TIMED_OUT. Everything * else means the thread should quit. Deleting the semaphore, as in * VideoProducer::HandleStop(), will trigger this behavior. */ if ((err != B_OK) && (err != B_TIMED_OUT)) break; fFrame++; /* Recalculate the time until the thread should wake up to begin * processing the next frame. Subtract fProcessingLatency so that * the frame is sent in time. */ wait_until = TimeSource()->RealTimeFor(fPerformanceTimeBase + (bigtime_t) ((fFrame - fFrameBase) * (1000000 / fConnectedFormat.field_rate)), 0) - fProcessingLatency; /* Drop frame if it's at least a frame late */ if (wait_until < system_time()) continue; /* If the semaphore was acquired successfully, it means something * changed the timing information (see VideoProducer::Connect()) and * so the thread should go back to sleep until the newly-calculated * wait_until time. */ if (err == B_OK) continue; /* Send buffers only if the node is running and the output has been * enabled */ if (!fRunning || !fEnabled) continue; BAutolock _(fLock); /* Fetch a buffer from the buffer group */ BBuffer *buffer = fBufferGroup->RequestBuffer( 4 * fConnectedFormat.display.line_width * fConnectedFormat.display.line_count, 0LL); if (!buffer) continue; /* Fill out the details about this buffer. */ media_header *h = buffer->Header(); h->type = B_MEDIA_RAW_VIDEO; h->time_source = TimeSource()->ID(); h->size_used = 4 * fConnectedFormat.display.line_width * fConnectedFormat.display.line_count; /* For a buffer originating from a device, you might want to calculate * this based on the PerformanceTimeFor the time your buffer arrived at * the hardware (plus any applicable adjustments). */ h->start_time = fPerformanceTimeBase + (bigtime_t) ((fFrame - fFrameBase) * (1000000 / fConnectedFormat.field_rate)); h->file_pos = 0; h->orig_size = 0; h->data_offset = 0; h->u.raw_video.field_gamma = 1.0; h->u.raw_video.field_sequence = fFrame; h->u.raw_video.field_number = 0; h->u.raw_video.pulldown_number = 0; h->u.raw_video.first_active_line = 1; h->u.raw_video.line_count = fConnectedFormat.display.line_count; if (fColor == 0xff000000) { // display a gray block that moves uint32 *p = (uint32 *)buffer->Data(); for (int y = 0; y < (int)fConnectedFormat.display.line_count; y++) for (int x = 0; x < (int)fConnectedFormat.display.line_width; x++) { if (x > (fFrame & 0xff) && x < (fFrame & 0xff) + 60 && y > 90 && y < 150) { *(p++) = 0xff777777; } else { *(p++) = 0x00000000; } } } else { /* Fill in a pattern */ uint32 *p = (uint32 *)buffer->Data(); for (int y = 0; y < (int)fConnectedFormat.display.line_count; y++) for (int x = 0; x < (int)fConnectedFormat.display.line_width; x++) *(p++) = ((((x+y)^0^x)+fFrame) & 0xff) * (0x01010101 & fColor); } /* Send the buffer on down to the consumer */ if (SendBuffer(buffer, fOutput.source, fOutput.destination) < B_OK) { PRINTF(-1, ("FrameGenerator: Error sending buffer\n")); /* If there is a problem sending the buffer, return it to its * buffer group. */ buffer->Recycle(); } } return B_OK; } int32 VideoProducer::_frame_generator_(void *data) { return ((VideoProducer *)data)->FrameGenerator(); }

↑ V576 Incorrect format. Consider checking the third actual argument of the 'printf' function. The memsize type argument is expected.

↑ V576 Incorrect format. Consider checking the second actual argument of the 'printf' function. The memsize type argument is expected.

↑ V576 Incorrect format. Consider checking the third actual argument of the 'printf' function. The memsize type argument is expected.

↑ V730 Not all members of a class are initialized inside the constructor. Consider inspecting: fFrame, fFrameBase, fPerformanceTimeBase, fConnectedFormat, fColor, fLastColorChange.

↑ V576 Potentially incorrect format string is passed to the 'printf' function. Prefix 'L' is not applicable to conversion specifier 'd'.