x264.c

法国人的264代码 大家看看啊,里面有很多可以借鉴的东西啊

                int i;
                if( long_options_index < 0 )
                {
                    for( i = 0; long_options[i].name; i++ )
                        if( long_options[i].val == c )
                        {
                            long_options_index = i;
                            break;
                        }
                    if( long_options_index < 0 )
                    {
                        /* getopt_long already printed an error message */
                        return -1;
                    }
                }

                b_error |= x264_param_parse( param, long_options[long_options_index].name, optarg ? optarg : "true" );
            }
        }

        if( b_error )
        {
            const char *name = long_options_index > 0 ? long_options[long_options_index].name : argv[optind-2];
            fprintf( stderr, "x264 [error]: invalid argument: %s = %s\n", name, optarg );
            return -1;
        }
    }

    /* Get the file name */
    if( optind > argc - 1 || !opt->hout )
    {
        fprintf( stderr, "x264 [error]: No %s file. Run x264 --help for a list of options.\n",
                 optind > argc - 1 ? "input" : "output" );
        return -1;
    }
    psz_filename = argv[optind++];

    /* check demuxer type */
    psz = psz_filename + strlen(psz_filename) - 1;
    while( psz > psz_filename && *psz != '.' )
        psz--;
    if( !strncasecmp( psz, ".avi", 4 ) || !strncasecmp( psz, ".avs", 4 ) )
        b_avis = 1;
    if( !strncasecmp( psz, ".y4m", 4 ) )
        b_y4m = 1;

    if( !(b_avis || b_y4m) ) // raw yuv
    {
        if( optind > argc - 1 )
        {
            /* try to parse the file name */
            for( psz = psz_filename; *psz; psz++ )
            {
                if( *psz >= '0' && *psz <= '9'
                    && sscanf( psz, "%ux%u", &param->i_width, &param->i_height ) == 2 )
                {
                    if( param->i_log_level >= X264_LOG_INFO )
                        fprintf( stderr, "x264 [info]: file name gives %dx%d\n", param->i_width, param->i_height );
                    break;
                }
            }
        }
        else
        {
            sscanf( argv[optind++], "%ux%u", &param->i_width, &param->i_height );
        }
    }
        
    if( !(b_avis || b_y4m) && ( !param->i_width || !param->i_height ) )
    {
        fprintf( stderr, "x264 [error]: Rawyuv input requires a resolution.\n" );
        return -1;
    }

    /* open the input */
    {
        if( b_avis )
        {
#ifdef AVIS_INPUT
            p_open_infile = open_file_avis;
            p_get_frame_total = get_frame_total_avis;
            p_read_frame = read_frame_avis;
            p_close_infile = close_file_avis;
#else
            fprintf( stderr, "x264 [error]: not compiled with AVIS input support\n" );
            return -1;
#endif
        }
        if ( b_y4m )
        {
            p_open_infile = open_file_y4m;
            p_get_frame_total = get_frame_total_y4m;
            p_read_frame = read_frame_y4m;
            p_close_infile = close_file_y4m;
        }

        if( p_open_infile( psz_filename, &opt->hin, param ) )
        {
            fprintf( stderr, "x264 [error]: could not open input file '%s'\n", psz_filename );
            return -1;
        }
    }

#ifdef HAVE_PTHREAD
    if( b_thread_input || param->i_threads > 1 )
    {
        if( open_file_thread( NULL, &opt->hin, param ) )
        {
            fprintf( stderr, "x264 [warning]: threaded input failed\n" );
        }
        else
        {
            p_open_infile = open_file_thread;
            p_get_frame_total = get_frame_total_thread;
            p_read_frame = read_frame_thread;
            p_close_infile = close_file_thread;
        }
    }
#endif

    return 0;
}

static void parse_qpfile( cli_opt_t *opt, x264_picture_t *pic, int i_frame )
{
    int num = -1, qp;
    char type;
    while( num < i_frame )
    {
        int ret = fscanf( opt->qpfile, "%d %c %d\n", &num, &type, &qp );
        if( num < i_frame )
            continue;
        pic->i_qpplus1 = qp+1;
        if     ( type == 'I' ) pic->i_type = X264_TYPE_IDR;
        else if( type == 'i' ) pic->i_type = X264_TYPE_I;
        else if( type == 'P' ) pic->i_type = X264_TYPE_P;
        else if( type == 'B' ) pic->i_type = X264_TYPE_BREF;
        else if( type == 'b' ) pic->i_type = X264_TYPE_B;
        else ret = 0;
        if( ret != 3 || qp < 0 || qp > 51 || num > i_frame )
        {
            fprintf( stderr, "x264 [error]: can't parse qpfile for frame %d\n", i_frame );
            fclose( opt->qpfile );
            opt->qpfile = NULL;
            pic->i_type = X264_TYPE_AUTO;
            pic->i_qpplus1 = 0;
            break;
        }
    }
}

/*****************************************************************************
 * Decode:
 *****************************************************************************/

static int  Encode_frame( x264_t *h, hnd_t hout, x264_picture_t *pic )
{
    x264_picture_t pic_out;
    x264_nal_t *nal;
    int i_nal, i;
    int i_file = 0;

    if( x264_encoder_encode( h, &nal, &i_nal, pic, &pic_out ) < 0 )
    {
        fprintf( stderr, "x264 [error]: x264_encoder_encode failed\n" );
    }

    for( i = 0; i < i_nal; i++ )
    {
        int i_size;
        int i_data;

        i_data = DATA_MAX;
        if( ( i_size = x264_nal_encode( data, &i_data, 1, &nal[i] ) ) > 0 )
        {
            i_file += p_write_nalu( hout, data, i_size );
        }
        else if( i_size < 0 )
        {
            fprintf( stderr, "x264 [error]: need to increase buffer size (size=%d)\n", -i_size );
        }
    }
    if (i_nal)
        p_set_eop( hout, &pic_out );

    return i_file;
}

/*****************************************************************************
 * Encode:
 *****************************************************************************/
static int  Encode( x264_param_t *param, cli_opt_t *opt )
{
    x264_t *h;
    x264_picture_t pic;

    int     i_frame, i_frame_total;
    int64_t i_start, i_end;
    int64_t i_file;
    int     i_frame_size;
    int     i_progress;

    i_frame_total = p_get_frame_total( opt->hin );
    i_frame_total -= opt->i_seek;
    if( ( i_frame_total == 0 || param->i_frame_total < i_frame_total )
        && param->i_frame_total > 0 )
        i_frame_total = param->i_frame_total;
    param->i_frame_total = i_frame_total;

    if( ( h = x264_encoder_open( param ) ) == NULL )
    {
        fprintf( stderr, "x264 [error]: x264_encoder_open failed\n" );
        p_close_infile( opt->hin );
        p_close_outfile( opt->hout );
        return -1;
    }

    if( p_set_outfile_param( opt->hout, param ) )
    {
        fprintf( stderr, "x264 [error]: can't set outfile param\n" );
        p_close_infile( opt->hin );
        p_close_outfile( opt->hout );
        return -1;
    }

    /* Create a new pic */
    x264_picture_alloc( &pic, X264_CSP_I420, param->i_width, param->i_height );

    i_start = x264_mdate();

    /* Encode frames */
    for( i_frame = 0, i_file = 0, i_progress = 0;
         b_ctrl_c == 0 && (i_frame < i_frame_total || i_frame_total == 0); )
    {
        if( p_read_frame( &pic, opt->hin, i_frame + opt->i_seek ) )
            break;

        pic.i_pts = (int64_t)i_frame * param->i_fps_den;

        if( opt->qpfile )
            parse_qpfile( opt, &pic, i_frame + opt->i_seek );
        else
        {
            /* Do not force any parameters */
            pic.i_type = X264_TYPE_AUTO;
            pic.i_qpplus1 = 0;
        }

        i_file += Encode_frame( h, opt->hout, &pic );

        i_frame++;

        /* update status line (up to 1000 times per input file) */
        if( opt->b_progress && param->i_log_level < X264_LOG_DEBUG && 
            ( i_frame_total ? i_frame * 1000 / i_frame_total > i_progress
                            : i_frame % 10 == 0 ) )
        {
            int64_t i_elapsed = x264_mdate() - i_start;
            double fps = i_elapsed > 0 ? i_frame * 1000000. / i_elapsed : 0;
            if( i_frame_total )
            {
                int eta = (int)(i_elapsed * (i_frame_total - i_frame) / ((int64_t)i_frame * 1000000));
                i_progress = i_frame * 1000 / i_frame_total;
                fprintf( stderr, "encoded frames: %d/%d (%.1f%%), %.2f fps, eta %d:%02d:%02d  \r",
                         i_frame, i_frame_total, (float)i_progress / 10, fps,
                         eta/3600, (eta/60)%60, eta%60 );
            }
            else
                fprintf( stderr, "encoded frames: %d, %.2f fps   \r", i_frame, fps );
            fflush( stderr ); // needed in windows
        }
    }
    /* Flush delayed B-frames */
    do {
        i_file +=
        i_frame_size = Encode_frame( h, opt->hout, NULL );
    } while( i_frame_size );

    i_end = x264_mdate();
    x264_picture_clean( &pic );
    x264_encoder_close( h );
    fprintf( stderr, "\n" );

    if( b_ctrl_c )
        fprintf( stderr, "aborted at input frame %d\n", opt->i_seek + i_frame );

    p_close_infile( opt->hin );
    p_close_outfile( opt->hout );

    if( i_frame > 0 )
    {
        double fps = (double)i_frame * (double)1000000 /
                     (double)( i_end - i_start );

        fprintf( stderr, "encoded %d frames, %.2f fps, %.2f kb/s\n", i_frame, fps,
                 (double) i_file * 8 * param->i_fps_num /
                 ( (double) param->i_fps_den * i_frame * 1000 ) );
    }

    return 0;
}