Added the tone producer add-on for testing and demo purposes
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3292 a95241bf-73f2-0310-859d-f6bbb57e9c96
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beveloper
@@ -6,5 +6,6 @@ SubInclude OBOS_TOP src add-ons media media-add-ons writer ;
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SubInclude OBOS_TOP src add-ons media media-add-ons legacy ;
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SubInclude OBOS_TOP src add-ons media media-add-ons mixer ;
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SubInclude OBOS_TOP src add-ons media media-add-ons multi_audio ;
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SubInclude OBOS_TOP src add-ons media media-add-ons tone_producer_demo ;
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SubInclude OBOS_TOP src add-ons media media-add-ons video_producer_demo ;
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@@ -0,0 +1,8 @@
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SubDir OBOS_TOP src add-ons media media-add-ons tone_producer_demo ;
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Addon tone_producer_demo.media_addon : media :
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ToneProducerAddOn.cpp
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ToneProducer.cpp
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;
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LinkSharedOSLibs tone_producer_demo.media_addon : be media ;
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,229 @@
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/*
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ToneProducer.h
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Copyright 1999, Be Incorporated. All Rights Reserved.
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This file may be used under the terms of the Be Sample Code License.
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NOTES [email protected] 11june99
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- this node has some holes in it, but it's pretty useful starting
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point for writing producers.
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- I've tried to clean up the format negotiation a bit, which didn't
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fare too well when faced with an apathetic downstream node
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(LoggingConsumer.)
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KNOWN BUGS
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eamoon 17jun99
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* Can't handle 2 channels, but is too polite to refuse.
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How embarrassing.
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*/
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#ifndef ToneProducer_H
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#define ToneProducer_H 1
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#include <media/BufferProducer.h>
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#include <media/MediaEventLooper.h>
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#include <media/Controllable.h>
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class BMediaAddOn;
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// ----------------
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// ToneProducer - a node to generate precisely defined digital tones
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class ToneProducer : public BBufferProducer, public BControllable, public BMediaEventLooper
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{
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public:
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enum event_t {
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// e.moon 2jun99
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_PARAMETER_EVENT = BTimedEventQueue::B_USER_EVENT
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};
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public:
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// add-on-friendly ctor
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// e.moon [8jun99]
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ToneProducer(BMediaAddOn* pAddOn=0);
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~ToneProducer();
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// BMediaNode methods
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BMediaAddOn* AddOn( int32* internal_id) const;
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// BControllable methods
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status_t GetParameterValue(
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int32 id,
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bigtime_t* last_change,
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void* value,
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size_t* ioSize);
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void SetParameterValue(
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int32 id,
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bigtime_t when,
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const void* value,
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size_t size);
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status_t StartControlPanel(
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BMessenger* pMessenger);
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// BBufferProducer methods
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status_t FormatSuggestionRequested(
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media_type type,
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int32 quality,
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media_format* format);
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status_t FormatProposal(
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const media_source& output,
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media_format* format);
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/* If the format isn't good, put a good format into *io_format and return error */
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/* If format has wildcard, specialize to what you can do (and change). */
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/* If you can change the format, return OK. */
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/* The request comes from your destination sychronously, so you cannot ask it */
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/* whether it likes it -- you should assume it will since it asked. */
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status_t FormatChangeRequested(
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const media_source& source,
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const media_destination& destination,
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media_format* io_format,
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int32* _deprecated_);
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status_t GetNextOutput( /* cookie starts as 0 */
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int32* cookie,
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media_output* out_output);
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status_t DisposeOutputCookie(
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int32 cookie);
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/* In this function, you should either pass on the group to your upstream guy, */
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/* or delete your current group and hang on to this group. Deleting the previous */
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/* group (unless you passed it on with the reclaim flag set to false) is very */
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/* important, else you will 1) leak memory and 2) block someone who may want */
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/* to reclaim the buffers living in that group. */
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status_t SetBufferGroup(
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const media_source& for_source,
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BBufferGroup* group);
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/* Iterates over all outputs and maxes the latency found */
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status_t GetLatency(
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bigtime_t* out_latency);
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status_t PrepareToConnect(
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const media_source& what,
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const media_destination& where,
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media_format* format,
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media_source* out_source,
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char* out_name);
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void Connect(
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status_t error,
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const media_source& source,
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const media_destination& destination,
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const media_format& format,
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char* io_name);
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void Disconnect(
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const media_source& what,
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const media_destination& where);
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void LateNoticeReceived(
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const media_source& what,
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bigtime_t how_much,
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bigtime_t performance_time);
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void EnableOutput(
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const media_source & what,
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bool enabled,
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int32* _deprecated_);
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status_t SetPlayRate(
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int32 numer,
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int32 denom);
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status_t HandleMessage(
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int32 message,
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const void* data,
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size_t size);
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void AdditionalBufferRequested(
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const media_source& source,
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media_buffer_id prev_buffer,
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bigtime_t prev_time,
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const media_seek_tag* prev_tag); // may be NULL
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void LatencyChanged(
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const media_source& source,
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const media_destination& destination,
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bigtime_t new_latency,
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uint32 flags);
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// BMediaEventLooper methods
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void NodeRegistered();
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void Start(bigtime_t performance_time);
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// Workaround for a Metrowerks PPC compiler bug
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void Stop(bigtime_t performance_time, bool immediate);
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// Workaround for a Metrowerks PPC compiler bug
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void Seek(bigtime_t media_time, bigtime_t performance_time);
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// Workaround for a Metrowerks PPC compiler bug
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void TimeWarp(bigtime_t at_real_time, bigtime_t to_performance_time);
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// Workaround for a Metrowerks PPC compiler bug
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status_t AddTimer(bigtime_t at_performance_time, int32 cookie);
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void SetRunMode(run_mode mode);
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void HandleEvent(
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const media_timed_event* event,
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bigtime_t lateness,
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bool realTimeEvent = false);
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/* removed e.moon 2jun99
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protected:
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// Workaround for a Metrowerks PPC compiler bug
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void CleanUpEvent(const media_timed_event *event);
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// Workaround for a Metrowerks PPC compiler bug
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bigtime_t OfflineTime();
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// Workaround for a Metrowerks PPC compiler bug
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void ControlLoop();
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// Workaround for a Metrowerks PPC compiler bug
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status_t DeleteHook(BMediaNode* node);
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*/
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private:
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void AllocateBuffers();
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BBuffer* FillNextBuffer(bigtime_t event_time);
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// 20sep99 e.moon: stereo support
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void FillSineBuffer(float* data, size_t numFrames, bool stereo);
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void FillTriangleBuffer(float* data, size_t numFrames, bool stereo);
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void FillSawtoothBuffer(float* data, size_t numFrames, bool stereo);
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BParameterWeb* mWeb;
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BBufferGroup* mBufferGroup;
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bigtime_t mLatency, mInternalLatency;
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media_output mOutput;
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bool mOutputEnabled;
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media_format mPreferredFormat;
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// These next attributes are related to tone buffer generation
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double mTheta; // generic parameter used by all generators
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bool mWaveAscending; // used by the triangle-wave generator
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float mFrequency; // can be anything, in Hertz
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float mGain; // should be in the range [0,1]
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int32 mWaveform;
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uint64 mFramesSent;
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bigtime_t mStartTime;
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// more parameter handling
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bigtime_t mGainLastChanged;
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bigtime_t mFreqLastChanged;
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bigtime_t mWaveLastChanged;
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// host addon
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// [8jun99] e.moon
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BMediaAddOn* m_pAddOn;
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};
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#endif
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@@ -0,0 +1,85 @@
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/* Written by Eric Moon, from the Cortex Source code archive.
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* Distributed under the terms of the Be Sample Code License
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*/
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// ToneProducerAddOn.cpp
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// e.moon 4jun99
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#include "ToneProducer.h"
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#include "ToneProducerAddOn.h"
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#include <cstring>
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#include <cstdlib>
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// instantiation function
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extern "C" _EXPORT BMediaAddOn* make_media_addon(image_id image) {
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return new ToneProducerAddOn(image);
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}
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// -------------------------------------------------------- //
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// ctor/dtor
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// -------------------------------------------------------- //
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ToneProducerAddOn::~ToneProducerAddOn() {}
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ToneProducerAddOn::ToneProducerAddOn(image_id image) :
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BMediaAddOn(image) {}
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// -------------------------------------------------------- //
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// BMediaAddOn impl
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// -------------------------------------------------------- //
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status_t ToneProducerAddOn::InitCheck(
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const char** out_failure_text) {
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return B_OK;
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}
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int32 ToneProducerAddOn::CountFlavors() {
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return 1;
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}
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status_t ToneProducerAddOn::GetFlavorAt(
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int32 n,
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const flavor_info** out_info) {
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if(n)
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return B_ERROR;
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flavor_info* pInfo = new flavor_info;
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pInfo->internal_id = n;
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pInfo->name = "ToneProducer";
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pInfo->info =
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"An add-on version of the ToneProducer node.\n"
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"See the Be Developer Newsletter: 2 June, 1999\n"
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"adapted by Eric Moon (4 June, 1999)";
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pInfo->kinds = B_BUFFER_PRODUCER | B_CONTROLLABLE;
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pInfo->flavor_flags = 0;
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pInfo->possible_count = 0;
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pInfo->in_format_count = 0;
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pInfo->in_formats = 0;
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pInfo->out_format_count = 1;
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media_format* pFormat = new media_format;
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pFormat->type = B_MEDIA_RAW_AUDIO;
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pFormat->u.raw_audio = media_raw_audio_format::wildcard;
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pInfo->out_formats = pFormat;
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*out_info = pInfo;
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return B_OK;
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}
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BMediaNode* ToneProducerAddOn::InstantiateNodeFor(
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const flavor_info* info,
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BMessage* config,
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status_t* out_error) {
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return new ToneProducer(this);
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}
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status_t ToneProducerAddOn::GetConfigurationFor(
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BMediaNode* your_node,
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BMessage* into_message) {
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// no config yet
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return B_OK;
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}
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// END -- ToneProducerAddOn.cpp
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@@ -0,0 +1,50 @@
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/* Written by Eric Moon, from the Cortex Source code archive.
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* Distributed under the terms of the Be Sample Code License
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*/
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// ToneProducerAddOn.h
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// e.moon 4jun99
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//
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// PURPOSE
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// Quickie AddOn class for the ToneProducer node.
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//
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#ifndef __ToneProducerAddOn_H__
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#define __ToneProducerAddOn_H__
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#include <MediaAddOn.h>
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// -------------------------------------------------------- //
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class ToneProducerAddOn :
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public BMediaAddOn {
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typedef BMediaAddOn _inherited;
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public: // ctor/dtor
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virtual ~ToneProducerAddOn();
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explicit ToneProducerAddOn(image_id image);
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public: // BMediaAddOn impl
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virtual status_t InitCheck(
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const char** out_failure_text);
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virtual int32 CountFlavors();
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virtual status_t GetFlavorAt(
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int32 n,
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const flavor_info ** out_info);
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virtual BMediaNode * InstantiateNodeFor(
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const flavor_info * info,
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BMessage * config,
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status_t * out_error);
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virtual status_t GetConfigurationFor(
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BMediaNode * your_node,
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BMessage * into_message);
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virtual bool WantsAutoStart() { return false; }
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virtual status_t AutoStart(
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int in_count,
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BMediaNode ** out_node,
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int32 * out_internal_id,
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bool * out_has_more) { return B_OK; }
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};
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#endif /*__ToneProducerAddOn_H__*/
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