Participating nodes

• E : extractor node
• A : audio codec node
• V : video codec node
• M : System Audio Mixer
• O : Darla-1 Out (Sound card)
• W : video window node

Connections

• E.Out => A.Int
  The extractor's first output is connected to the audio codec node's input.
  • Media Type: Encoded Audio
  • Bit Rate: *
  • Frame Size: *
• A.Out => M.Int
  The codec node's output is connected to the system audio mixer's input.
  • Media Type: Raw Audio
  • Format: 16 bit Integer
  • Sample Rate: 24.00 kHz
  • Channels: Stereo
  • Channel Mask: (none)
  • Matrix Mask: (none)
  • Byte Order: Little Endian
  • Buffer Size: 2048 bytes per buffer
• M.AMr => O.E11
  The system audio mixer's "mixer" output is connected to the first output on the sound card.
  • Media Type: Raw Audio
  • Format: 32 bit float
  • Sample Rate: 44.10 kHz
  • Channels: Stereo
  • Channel Mask: (none)
  • Matrix Mask: (none)
  • Byte Order: Little Endian
  • Buffer Size: 512 bytes per buffer
• E.Out => V.In The extractor's second output is connected to the video codec node's input.
  • Media Type: Encoded Video
  • Bit Rate: 0.00 kb/s (avg), 0.00 kb/s (max) note: broken
  • Frame Size: 65536 bytes per frame note: broken?
  • History: *
• V.Out => W.VW1 The video codec's output is connected to the view windows first video window pin.
  • Media Type: Raw Video
  • Format: 32 bit RGB
  • Resolution: 352x240
  • Field Rate: Non-Interlaced 29.97 Hz (NTSC)
  • Orientation: Top to Bottom, Left to Right
  • Aspect Ratio: 1:1
  • Active Lines: *
  • Offset: *

Details

(see also OpenBeOS.MediaKit.NodeTypes, OpenBeOS.MediaKit.NodeKinds, OpenBeOS.MediaKit.Nodes)

E
• Type: Live File-Interface Node
• Port: 69536 (ExtractorNode port)
• Kinds: Buffer Producer & File Interface
• Run Mode: Increase Latency
• Latency: 45 ms
• File Format: AVI Movie file (video/x-msvdeo)
• Tracks:
  1. Encoded Video (0.00 kb/s (avg), 0.00 kb/s (max)) note: broken
     - Codec: DivX ;),SmR MPEG-4 Decoder
     - Duration: 02:04:12:00
  2. Encoded Audio
     - Codec: DivX ;-) Audio Decoder
     - Duration: 00:00:00:00 note: broken

A
• Type: Live Media Node
• Port: 73467 (DecoderNode port)
• Kinds: Buffer Producer & Buffer Consumer
• Run Mode: Increase Latency
• Latency: 6.99 ms

V
• Type: Live Media Node
• Port: 73467 (DecoderNode port)
• Kinds: Buffer Producer & Buffer Consumer
• Run Mode: Increase Latency
• Latency: 20.00 ms

M
• Type: Live Media Node
• Port: 73198 (BMixer service port)
• Kinds: Buffer Producer, Buffer Consumer, Controllable, System Mixer
• Run Mode: unknown
• Latency: 2.74 ms

O
• Type: Live Media Node
• Port: 73200 (Darla-1 CPort)
• Kinds: Buffer Producer, Buffer Consumer, Time Source, Controllable, Physical Input, Physical Output
• Run Mode: Recording
• Latency: 2.90 ms

W
• Type: Live Media Node
• Port: 73201 (VideoWindow Port)
• Kinds: Buffer Consumer, Physical Output
• Run Mode: Increase Latency

Hooking it all up.

The M, O, and W nodes are already instantiated by the system. The M and O nodes are also already connected.

We start off with the file that we want to play. This is usually an entry_ref. (an entry_ref is basically a device, directory, and filename) At this point we have a choice of using BRoster::SniffRef() or using BMediaFile. Let's use BMediaFile for now. So, we'll take the entry_ref and create an instance of BMediaFile with it. (see also OpenBeOS.MediaKit.MediaFile)

void doIt (entry_ref * fileToPlay)
{
  BMediaFile * mediaFile = new BMediaFile(fileToPlay);
...