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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,133 +1,11 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "unsafe" | ||
|
|
||
| "github.com/djthorpe/gopi/v3/pkg/sys/mmal" | ||
| "github.com/djthorpe/gopi/v3/pkg/tool" | ||
| ) | ||
|
|
||
| func main() { | ||
| args := os.Args | ||
| if len(args) != 2 { | ||
| fmt.Fprintln(os.Stderr, "Expected file argument") | ||
| os.Exit(-1) | ||
| } | ||
| fh, err := os.Open(args[1]) | ||
| if err != nil { | ||
| fmt.Fprintln(os.Stderr, err) | ||
| os.Exit(-1) | ||
| } | ||
| defer fh.Close() | ||
| fmt.Println("Decoding", fh.Name()) | ||
| if err := Run(fh); err != nil { | ||
| fmt.Fprintln(os.Stderr, err) | ||
| os.Exit(-1) | ||
| } | ||
| } | ||
|
|
||
| func Run(r io.ReadSeeker) error { | ||
| decoder, err := mmal.MMALComponentCreate(mmal.MMAL_COMPONENT_DEFAULT_IMAGE_DECODER) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer decoder.Free() | ||
|
|
||
| // Input | ||
| in := decoder.InputPorts()[0] | ||
| in.Format().Video().SetSize(1280, 720) | ||
|
|
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| // Commit format | ||
| if err := in.FormatCommit(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| pool_in := in.CreatePool(in.BufferPreferred()) | ||
| if pool_in == nil { | ||
| return fmt.Errorf("Failed to create pool_in") | ||
| } | ||
| defer in.FreePool(pool_in) | ||
|
|
||
| // Output | ||
| out := decoder.OutputPorts()[0] | ||
| if err := out.FormatFullCopy(in.Format()); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Commit format | ||
| if err := in.FormatCommit(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| pool_out := in.CreatePool(out.BufferMin()) | ||
| if pool_out == nil { | ||
| return fmt.Errorf("Failed to create pool_out") | ||
| } | ||
| defer out.FreePool(pool_out) | ||
| defer out.Flush() | ||
|
|
||
| // Enable all the input port and the output port. | ||
| if err := in.EnableWithCallback(input_callback); err != nil { | ||
| return err | ||
| } | ||
| defer in.Disable() | ||
|
|
||
| if err := out.EnableWithCallback(output_callback); err != nil { | ||
| return err | ||
| } | ||
| defer out.Disable() | ||
|
|
||
| // Enable the decoder and renderer | ||
| if err := decoder.Enable(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Data processing loop, eof = end of input file, eoe = end of encoding | ||
| eof := false | ||
| i := 0 | ||
| for eof == false && i < 500 { | ||
| fmt.Println("LOOP eof=", eof, " i=", i) | ||
| i++ | ||
|
|
||
| // Send data to decode to the input port of the video decoder | ||
| if eof == false { | ||
| fmt.Println(" SEND DATA INTO DECODER") | ||
| if buffer := pool_in.Get(); buffer != nil { | ||
| if err := buffer.Fill(r); err == io.EOF { | ||
| buffer.SetFlags(mmal.MMAL_BUFFER_HEADER_FLAG_EOS) | ||
| eof = true | ||
| } else if err != nil { | ||
| return err | ||
| } else { | ||
| if err := in.SendBuffer(buffer); err != nil { | ||
| return err | ||
| } else { | ||
| fmt.Println(" Sent to decoder -> ", buffer) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fmt.Println("FINISHED LOOP") | ||
|
|
||
| // Return success | ||
| return nil | ||
| } | ||
|
|
||
| // input_callback is called when a buffer should be discarded on an input port | ||
| func input_callback(port *mmal.MMALPort, buffer *mmal.MMALBuffer) { | ||
| // The decoder is done with the data, just recycle the buffer header into its pool | ||
| fmt.Println("input_callback done with buffer", buffer) | ||
| buffer.Release() | ||
| } | ||
|
|
||
| // output_callback is called when a buffer is available on an output port | ||
| func output_callback(port *mmal.MMALPort, buffer *mmal.MMALBuffer) { | ||
| queue := (*mmal.MMALQueue)(unsafe.Pointer(port.Userdata())) | ||
| // Queue the decoded video frame | ||
| queue.Put(buffer) | ||
| fmt.Println("output_callback, decoded video=", buffer, " => ", queue) | ||
| os.Exit(tool.CommandLine("mmalplayer", os.Args[1:], new(app))) | ||
| } |
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