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

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revision 1.1, Sun Mar 23 04:03:01 2003 UTC revision 1.1.2.4, Sat May 17 13:36:38 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 Edouard Gomez <ed.gomez@wanadoo.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            /* fprintf(rc->stat_file, "# XviD 2pass stat file\n");
69        fprintf(rc->stat_file, "version %i.%i.%i\n",XVID_MAJOR(XVID_VERSION), XVID_MINOR(XVID_VERSION), XVID_PATCH(XVID_VERSION));
70            fprintf(rc->stat_file, "start\n");
71        fprintf(rc->stat_file, "type quantizer length kblocks mblocks ublocks\n");  */
72    
73        rc->fq_error = 0;
74    
75        *handle = rc;
76            return(0);
77    }
78    
79    
80    static int rc_2pass1_destroy(rc_2pass1_t * rc, xvid_plg_destroy_t * destroy)
81    {
82            fclose(rc->stat_file);
83    
84            free(rc);
85            return(0);
86    }
87    
88    
89    static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data)
90    {
91         if (data->quant <= 0) {
92            if (data->zone && data->zone->mode == XVID_ZONE_QUANT) {
93                rc->fq_error += (double)data->zone->increment / (double)data->zone->base;
94                data->quant = (int)rc->fq_error;
95                rc->fq_error -= data->quant;
96    
97            }else {
98                data->quant = 2;
99            }
100        }
101        return 0;
102    }
103    
104    
105    static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data)
106    {
107            char type;
108    
109            /* Frame type in ascii I/P/B */
110            switch(data->type) {
111            case XVID_TYPE_IVOP:
112                    type = 'i';
113                    break;
114            case XVID_TYPE_PVOP:
115                    type = 'p';
116                    break;
117            case XVID_TYPE_BVOP:
118                    type = 'b';
119                    break;
120            case XVID_TYPE_SVOP:
121                    type = 's';
122                    break;
123            default: /* Should not go here */
124                    return(XVID_ERR_FAIL);
125            }
126    
127            /* write the resulting statistics */
128    
129            fprintf(rc->stat_file, "%c %d %d %d %d %d\n",
130            type,
131                    data->quant,
132                    data->kblks,
133            data->mblks,
134            data->ublks,
135            data->length);
136    
137            return(0);
138    }
139    
140    
141    
142    int xvid_plugin_2pass1(void * handle, int opt, void * param1, void * param2)
143    {
144        switch(opt)
145        {
146        case XVID_PLG_INFO :
147            return 0;
148    
149        case XVID_PLG_CREATE :
150            return rc_2pass1_create((xvid_plg_create_t*)param1, param2);
151    
152        case XVID_PLG_DESTROY :
153            return rc_2pass1_destroy((rc_2pass1_t*)handle, (xvid_plg_destroy_t*)param1);
154    
155        case XVID_PLG_BEFORE :
156            return rc_2pass1_before((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1);
157    
158        case XVID_PLG_AFTER :
159            return rc_2pass1_after((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1);
160        }
161    
162        return XVID_ERR_FAIL;
163    }
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