Re: Some questions about Dirac

[Samul Kevin <lo...@gmail.com>]

2009/3/27 chen hecky <he...@gmail.com>

> I find it in my whole system, but I don't find it's definition.  :-(
>
-> can you explain it clearly? what do you mean by "find it in my whole
system" but "can't find definition" .

>
> 2009/3/27 Samul Kevin <lo...@gmail.com>
>
> > 2009/3/24 chen hecky <he...@gmail.com>
> >
> > > Thank  J Aaron Farr,
> > > I have studied using Dirac(http://diracvideo.org/), which maybe
> replace
> > > the
> > > FFmpeg, but there are some problem in compiling the programmer from the
> > > programmers_guide.
> > >
> > >
> > >
> > > ////the programmer codes text.c
> > > *
> > > #include <errno.h>
> > > #include <stdio.h>
> > > #include <stdlib.h>
> > >
> > >
> > >
> > > /* Include Dirac Encoder Header file */
> > > #include <libdirac_encoder/dirac_encoder.h>
> > > //#include "/usr/local/include/dirac/libdirac_encoder/dirac_encoder.h"
> > > #define ENCBUF_SIZE (1024*1024)
> > > int main (int argc, char **argv)
> > > {
> > >    FILE *in;
> > >    FILE *out;
> > >    dirac_encoder_context_t enc_ctx;
> > >    dirac_encoder_t *encoder;
> > >    unsigned char *unc_frame;
> > >    int unc_frame_size;
> > >    unsigned char enc_frame[ENCBUF_SIZE];
> > >    int go = 1;
> > >    dirac_encoder_state_t state;
> > >    if (argc < 3)
> > >    {
> > >        printf ("Usage : %s input-file output-file\n", argv[0]);
> > >        exit(0);
> > >    }
> > >    /* open input file */
> > >    if ( (in = fopen (argv[1], "rb")) == NULL)
> > >    {
> > >        perror (argv[1]);
> > >        exit(errno);
> > >    }
> > >    /* open output file */
> > >    if ( (out = fopen (argv[2], "wb")) == NULL)
> > >    {
> > >        perror (argv[2]);
> > >        exit(errno);
> > >    }
> > > /* set flag to retrieve locally decoded frames from encoder */
> > > enc_ctx.decode_flag = 1;
> > > /* Initialise the encoder with the encoder context */
> > > if ( (encoder = dirac_encoder_init(&enc_ctx, 0)) == NULL)
> > > {
> > >    printf ("Error initialising the encoder\n");
> > >    exit(-1);
> > > }
> > > /* Calculate the size of an uncompressed frame */
> > > unc_frame_size = (encoder->enc_ctx.src_params.height *
> > >   encoder->enc_ctx.src_params.width) +
> > >   2*(encoder->enc_ctx.src_params.chroma_height
> > >            * encoder->enc_ctx.src_params.chroma_width);
> > > /* Allocate memory for an uncompressed frame */
> > > unc_frame = (unsigned char *)malloc(unc_frame_size);
> > > /* Main loop */
> > > do
> > > {
> > >    /*
> > >    * Read one frame of uncompressed data into the buffer and
> > >    * load it into the encoder
> > >    */
> > >    if ( fread( unc_frame, unc_frame_size, 1, in) == 1)
> > >    {
> > >         if (dirac_encoder_load( encoder, unc_frame, unc_frame_size ) <
> 0)
> > >         {
> > >              fprintf (stderr, "dirac_encoder_load failed. Unrecoverable
> > > error...\n");
> > >              exit(-1);
> > >         }
> > >    }
> > >    else
> > >    {
> > >         /* signal end of sequence to encoder */
> > >         dirac_encoder_end_sequence( encoder );
> > >    }
> > >    do
> > >    {
> > >         /*
> > >         * Frame loaded successfully, so now set up the encode
> > >         * buffer in the encoder handler before calling the
> > >         * encoding function.
> > >         */
> > >         encoder->enc_buf.buffer = enc_frame;
> > >         encoder->enc_buf.size = ENCBUF_SIZE;
> > >         /* Call the encoding function */
> > >         state = dirac_encoder_output (encoder);
> > >         /*
> > >         * Depending on the return value of the encode function
> > >         * take appropriate action
> > >         */
> > >         switch (state)
> > >         {
> > >         case ENC_STATE_AVAIL:
> > >             /*
> > >             * Encoded picture available in enc_buf. Write the
> > >             * buffer to the output file
> > >             */
> > >
> > >    /* Initialise the encoder context with presets for SD576I50 */
> > >    dirac_encoder_context_init (&enc_ctx, VIDEO_FORMAT_SD576I50);
> > >    /* override some of the preset defaults */
> > >    /* Set quality factor to 7.5 */
> > >    enc_ctx.enc_params.qf = 7.5;
> > >    /* set input video type to progressive video */
> > >    enc_ctx.source_params.source_sampling = 0;
> > >
> > >
> > >               fwrite (encoder->enc_buf.buffer, encoder->enc_buf.size,
> > >                       1, out);
> > >               /*
> > >               * In addition to the encoded picture, the following
> > metadata
> > >               * is also available.
> > >               * encoded picture stats in encoder->enc_pstats
> > >               * encoded picture params in encoder->enc_pparams
> > >               */
> > >               break;
> > >          case ENC_STATE_BUFFER:
> > >               /*
> > >               * Encoder needs more data to continue processing
> > >               */
> > >               break;
> > >          case ENC_STATE_EOS:
> > >               /*
> > >               * End of sequence info available in enc_buf. Write the
> > >               * buffer to the output file
> > >               */
> > >               fwrite (encoder->enc_buf.buffer, encoder->enc_buf.size,
> > >                       1, out);
> > >               /*
> > >               * In addition to the encoded picture, the following
> > metadata
> > >               * is also available.
> > >               * encoded sequence stats in encoder->enc_seqstats
> > >               */
> > >               break;
> > >          case ENC_STATE_INVALID:
> > >          default:
> > >               printf ("Irrecoverable error. quitting...");
> > >               free (unc_frame);
> > >               dirac_encoder_close(encoder);
> > >               exit(-1);
> > >               break;
> > >          }
> > >          if (encoder->decoded_frame_avail)
> > >          {
> > >               /*
> > >               * Locally decoded frame available in encoder->dec_buf
> > >               */
> > >          }
> > >          if (encoder->instr_data_avail)
> > >          {
> > >               /*
> > >               * Instrumentation data available in encoder->instr
> > >               */
> > >          }
> > >      } while (state == ENC_STATE_AVAIL);
> > >  } while (go);
> > >  /* Free the encoder resources */
> > >  dirac_encoder_close(encoder);
> > >  /* Free the uncompressed data buffer */
> > >  free (unc_frame);
> > >  fclose (in);
> > >  fclose (out);
> > > }
> > > *
> > > Some error:
> > >
> > > *root@:~/Desktop/Test# gcc -I/usr/local/include/dirac text.c
> > > text.c: In function ‘main’:
> >
> > ->>missing any header file which including the definition of
> > VIDEO_FORMAT_SD576I50?
> >
> > >
> > > text.c:98: error: ‘VIDEO_FORMAT_SD576I50’ undeclared (first use in this
> > > function)
> >
> >
> >
> > >
> > > text.c:98: error: (Each undeclared identifier is reported only once
> > > text.c:98: error: for each function it appears in.)
> > > text.c:103: error: ‘dirac_encoder_context_t’ has no member named
> > > ‘source_params’*
> > >
> > > If anyone had used Dirac, can you give some suggestions?
> > >
> > >
> > > Hecky @ Bluesky Dev Team XJTU
> > >
> >
> >
> >
> > --
> > Bowen Ma a.k.a Samul Kevin @ Bluesky Dev Team    XJTU
> >
>
>
>
> --
> Hecky @ Bluesky Dev Team XJTU
>



-- 
Bowen Ma a.k.a Samul Kevin @ Bluesky Dev Team    XJTU