[cvs] / xvidcore / src / plugins / plugin_2pass1.c Repository:
ViewVC logotype

Diff of /xvidcore/src/plugins/plugin_2pass1.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.1, Sun Mar 23 04:03:01 2003 UTC revision 1.1.2.5, Mon Jun 9 13:55:07 2003 UTC
# Line 0  Line 1 
1    /******************************************************************************
2     *
3     *  XviD Bit Rate Controller Library
4     *  - VBR 2 pass bitrate controler implementation -
5     *
6     *  Copyright (C) 2002-2003 Edouard Gomez <ed.gomez@free.fr>
7     *
8     *  The curve treatment algorithm is the one implemented by Foxer <email?> and
9     *  Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library.
10     *
11     *  This program is free software; you can redistribute it and/or modify
12     *  it under the terms of the GNU General Public License as published by
13     *  the Free Software Foundation; either version 2 of the License, or
14     *  (at your option) any later version.
15     *
16     *  This program is distributed in the hope that it will be useful,
17     *  but WITHOUT ANY WARRANTY; without even the implied warranty of
18     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19     *  GNU General Public License for more details.
20     *
21     *  You should have received a copy of the GNU General Public License
22     *  along with this program; if not, write to the Free Software
23     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
24     *
25     * $Id$
26     *
27     *****************************************************************************/
28    
29    #include <stdio.h>
30    
31    #include "../xvid.h"
32    #include "../image/image.h"
33    
34    
35    /* context struct */
36    typedef struct
37    {
38            FILE * stat_file;
39    
40        double fq_error;
41    } rc_2pass1_t;
42    
43    
44    
45    static int rc_2pass1_create(xvid_plg_create_t * create, rc_2pass1_t ** handle)
46    {
47        xvid_plugin_2pass1_t * param = (xvid_plugin_2pass1_t *)create->param;
48            rc_2pass1_t * rc;
49    
50        /* check filename */
51        if (param->filename == NULL || param->filename[0] == '\0')
52            return XVID_ERR_FAIL;
53    
54        /* allocate context struct */
55            if((rc = malloc(sizeof(rc_2pass1_t))) == NULL)
56                    return(XVID_ERR_MEMORY);
57    
58        /* Initialize safe defaults for 2pass 1 */
59        rc->stat_file = NULL;
60    
61            /* Open the 1st pass file */
62            if((rc->stat_file = fopen(param->filename, "w+")) == NULL)
63                    return(XVID_ERR_FAIL);
64    
65            /*
66             * The File Header
67             */
68    #if 0
69            fprintf(rc->stat_file, "# XviD 2pass stat file\n");
70        fprintf(rc->stat_file, "version %i.%i.%i\n",XVID_MAJOR(XVID_VERSION), XVID_MINOR(XVID_VERSION), XVID_PATCH(XVID_VERSION));
71            fprintf(rc->stat_file, "start\n");
72        fprintf(rc->stat_file, "type quantizer length kblocks mblocks ublocks\n");
73    #endif
74    
75        rc->fq_error = 0;
76    
77        *handle = rc;
78            return(0);
79    }
80    
81    
82    static int rc_2pass1_destroy(rc_2pass1_t * rc, xvid_plg_destroy_t * destroy)
83    {
84            fclose(rc->stat_file);
85    
86            free(rc);
87            return(0);
88    }
89    
90    
91    static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data)
92    {
93         if (data->quant <= 0) {
94            if (data->zone && data->zone->mode == XVID_ZONE_QUANT) {
95                rc->fq_error += (double)data->zone->increment / (double)data->zone->base;
96                data->quant = (int)rc->fq_error;
97                rc->fq_error -= data->quant;
98    
99            }else {
100                data->quant = 2;
101            }
102        }
103        return 0;
104    }
105    
106    
107    static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data)
108    {
109            char type;
110    
111            /* Frame type in ascii I/P/B */
112            switch(data->type) {
113            case XVID_TYPE_IVOP:
114                    type = 'i';
115                    break;
116            case XVID_TYPE_PVOP:
117                    type = 'p';
118                    break;
119            case XVID_TYPE_BVOP:
120                    type = 'b';
121                    break;
122            case XVID_TYPE_SVOP:
123                    type = 's';
124                    break;
125            default: /* Should not go here */
126                    return(XVID_ERR_FAIL);
127            }
128    
129            /* write the resulting statistics */
130    
131            fprintf(rc->stat_file, "%c %d %d %d %d %d\n",
132            type,
133                    data->quant,
134                    data->kblks,
135            data->mblks,
136            data->ublks,
137            data->length);
138    
139            return(0);
140    }
141    
142    
143    
144    int xvid_plugin_2pass1(void * handle, int opt, void * param1, void * param2)
145    {
146        switch(opt)
147        {
148        case XVID_PLG_INFO :
149            return 0;
150    
151        case XVID_PLG_CREATE :
152            return rc_2pass1_create((xvid_plg_create_t*)param1, param2);
153    
154        case XVID_PLG_DESTROY :
155            return rc_2pass1_destroy((rc_2pass1_t*)handle, (xvid_plg_destroy_t*)param1);
156    
157        case XVID_PLG_BEFORE :
158            return rc_2pass1_before((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1);
159    
160        case XVID_PLG_AFTER :
161            return rc_2pass1_after((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1);
162        }
163    
164        return XVID_ERR_FAIL;
165    }
Legend:
Removed from v.1.1  
changed lines
  Added in v.1.1.2.5
No admin address has been configured
 ViewVC Help
Powered by ViewVC 1.0.4