src/swf_tag_sprite.c

   1 /*
   2   +----------------------------------------------------------------------+
   3   | Author: yoya@awm.jp                                                  |
   4   +----------------------------------------------------------------------+
   5 */
   6
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include "bitstream.h"
  10 #include "swf_tag_sprite.h"
  11 #include "swf_object.h"
  12
  13 swf_tag_detail_handler_t sprite_detail_handler;
  14
  15 swf_tag_detail_handler_t *
  16 swf_tag_sprite_detail_handler(void) {
  17     sprite_detail_handler.create   = swf_tag_sprite_create_detail;
  18     sprite_detail_handler.input    = swf_tag_sprite_input_detail;
  19     sprite_detail_handler.get_cid  = swf_tag_sprite_get_cid_detail;
  20     sprite_detail_handler.replace_cid = swf_tag_sprite_replace_cid_detail;
  21     sprite_detail_handler.output   = swf_tag_sprite_output_detail;
  22     sprite_detail_handler.print    = swf_tag_sprite_print_detail;
  23     sprite_detail_handler.destroy  = swf_tag_sprite_destroy_detail;
  24     return &sprite_detail_handler;
  25 }
  26
  27 void *
  28 swf_tag_sprite_create_detail(void) {
  29     swf_tag_sprite_detail_t *swf_tag_sprite;
  30     swf_tag_sprite = calloc(sizeof(*swf_tag_sprite), 1);
  31     if (swf_tag_sprite == NULL) {
  32         fprintf(stderr, "ERROR: swf_tag_sprite_create_detail: can't calloc\n");
  33         return NULL;
  34     }
  35     return swf_tag_sprite;
  36 }
  37
  38 int
  39 swf_tag_sprite_input_detail(swf_tag_t *tag, struct swf_object_ *swf) {
  40     swf_tag_sprite_detail_t *swf_tag_sprite = tag->detail;
  41     unsigned char *data  = tag->data;
  42     unsigned long length = tag->length;
  43     bitstream_t *bs;
  44     swf_tag_t *tag_in_sprite, *prev_tag;
  45     (void) swf;
  46     if (swf_tag_sprite == NULL) {
  47         fprintf(stderr, "ERROR: swf_tag_sprite_input_detail: swf_tag_sprite == NULL\n");
  48         return 1;
  49     }
  50     bs = bitstream_open();
  51     bitstream_input(bs, data, length);
  52     swf_tag_sprite->sprite_id = bitstream_getbytesLE(bs, 2);
  53     swf_tag_sprite->frame_count = bitstream_getbytesLE(bs, 2);
  54     //
  55
  56     prev_tag = NULL;
  57     while(1) {
  58         long pos;
  59         pos = bitstream_getbytepos(bs);
  60         if ((pos == -1) || ((long) length <= pos)) {
  61             break;
  62         }
  63         tag_in_sprite = swf_tag_create(bs);
  64         if (tag_in_sprite == NULL) {
  65             fprintf(stderr, "swf_object_input: swf_tag_create failed\n");
  66             break;
  67         }
  68         if (prev_tag == NULL) {
  69             swf_tag_sprite->tag = tag_in_sprite;
  70             tag_in_sprite->prev = NULL;
  71         } else {
  72             prev_tag->next = tag_in_sprite;
  73             tag_in_sprite->prev = prev_tag;
  74         }
  75         tag_in_sprite->next = NULL;
  76         prev_tag = tag_in_sprite;
  77     }
  78     bitstream_close(bs);
  79     return 0;
  80 }
  81
  82 int swf_tag_sprite_get_cid_detail(swf_tag_t *tag) {
  83     unsigned char *data = tag->data;
  84     if (tag->detail) {
  85         swf_tag_sprite_detail_t *swf_tag_sprite = (swf_tag_sprite_detail_t *) tag->detail;
  86         return swf_tag_sprite->sprite_id;
  87     }
  88     if (data == NULL) {
  89         fprintf(stderr, "swf_tag_sprite_get_cid_detail: data == NULL\n");
  90         return -1;
  91     }
  92     return GetUShortLE(data); // sprite_id;
  93 }
  94
  95 int swf_tag_sprite_replace_cid_detail(swf_tag_t *tag, int id) {
  96     unsigned char *data = tag->data;
  97     if (tag->detail) {
  98         swf_tag_sprite_detail_t *swf_tag_sprite = (swf_tag_sprite_detail_t *) tag->detail;
  99         swf_tag_sprite->sprite_id = id;
 100     }
 101     if (data) {
 102         PutUShortLE(data, id);
 103     }
 104     return 0; // always 0
 105 }
 106
 107 unsigned char *
 108 swf_tag_sprite_output_detail(swf_tag_t *tag, unsigned long *length,
 109                            struct swf_object_ *swf) {
 110     swf_tag_sprite_detail_t *swf_tag_sprite = (swf_tag_sprite_detail_t *) tag->detail;
 111     bitstream_t *bs;
 112     unsigned char *data;
 113     swf_tag_t *_tag;
 114     *length = 0;
 115     bs = bitstream_open();
 116     bitstream_putbytesLE(bs, swf_tag_sprite->sprite_id, 2);
 117     bitstream_putbytesLE(bs, swf_tag_sprite->frame_count, 2);
 118     for (_tag=swf_tag_sprite->tag ; _tag ; _tag=_tag->next) {
 119         swf_tag_build(bs, _tag, swf);
 120     }
 121     data = bitstream_steal(bs, length);
 122     bitstream_close(bs);
 123     return data;
 124 }
 125
 126 void
 127 swf_tag_sprite_print_detail(swf_tag_t *tag,
 128                             struct swf_object_ *swf,
 129                             int indent_depth) {
 130     swf_tag_sprite_detail_t *swf_tag_sprite = (swf_tag_sprite_detail_t *) tag->detail;
 131     int i;
 132     swf_tag_t *_tag;
 133     print_indent(indent_depth);
 134     printf("sprite_id=%d\n", swf_tag_sprite->sprite_id);
 135     print_indent(indent_depth);
 136     printf("frame_count=%d\n", swf_tag_sprite->frame_count);
 137     _tag = swf_tag_sprite->tag;
 138     for (i=0 ; _tag ; i++) {
 139         print_indent(indent_depth);
 140         printf("  [%d] ", i);
 141         swf_tag_print(_tag, swf, indent_depth + 1);
 142         if (_tag->code == 0) { // END Tag
 143             break;
 144         }
 145         _tag = _tag->next;
 146     }
 147     return ;
 148 }
 149
 150 void
 151 swf_tag_sprite_destroy_detail(swf_tag_t *tag) {
 152     swf_tag_sprite_detail_t *swf_tag_sprite = (swf_tag_sprite_detail_t *) tag->detail;
 153     if (swf_tag_sprite) {
 154         swf_tag_t *t, *next_tag;
 155         for (t = swf_tag_sprite->tag ; t ; t = next_tag) {
 156             next_tag = t->next;
 157             swf_tag_destroy(t);
 158         }
 159         free(swf_tag_sprite);
 160         tag->detail = NULL;
 161     }
 162     return ;
 163 }