29 #define GCE_DISPOSAL_NONE 0
30 #define GCE_DISPOSAL_INPLACE 1
31 #define GCE_DISPOSAL_BACKGROUND 2
32 #define GCE_DISPOSAL_RESTORE 3
65 int is_interleaved, has_local_palette, y,
pass, y1, linesize, n, i;
66 uint8_t *ptr, *spal, *palette, *ptr1;
68 left = bytestream2_get_le16(&s->
gb);
69 top = bytestream2_get_le16(&s->
gb);
70 width = bytestream2_get_le16(&s->
gb);
71 height = bytestream2_get_le16(&s->
gb);
72 flags = bytestream2_get_byte(&s->
gb);
73 is_interleaved = flags & 0x40;
74 has_local_palette = flags & 0x80;
75 bits_per_pixel = (flags & 0x07) + 1;
77 av_dlog(s->
avctx,
"gif: image x=%d y=%d w=%d h=%d\n", left, top, width, height);
79 if (has_local_palette) {
96 n = (1 << bits_per_pixel);
98 for(i = 0; i < n; i++) {
109 code_size = bytestream2_get_byte(&s->
gb);
115 ptr1 = frame->
data[0] + top * linesize + left;
119 for (y = 0; y <
height; y++) {
121 if (is_interleaved) {
138 while (y1 >= height) {
140 ptr = ptr1 + linesize * y1;
156 int ext_code, ext_len, i, gce_flags, gce_transparent_index;
159 ext_code = bytestream2_get_byte(&s->
gb);
160 ext_len = bytestream2_get_byte(&s->
gb);
162 av_dlog(s->
avctx,
"gif: ext_code=0x%x len=%d\n", ext_code, ext_len);
169 gce_flags = bytestream2_get_byte(&s->
gb);
171 gce_transparent_index = bytestream2_get_byte(&s->
gb);
172 if (gce_flags & 0x01)
178 av_dlog(s->
avctx,
"gif: gce_flags=%x delay=%d tcolor=%d disposal=%d\n",
182 ext_len = bytestream2_get_byte(&s->
gb);
188 while (ext_len != 0) {
189 for (i = 0; i < ext_len; i++)
190 bytestream2_get_byte(&s->
gb);
191 ext_len = bytestream2_get_byte(&s->
gb);
202 int has_global_palette;
223 v = bytestream2_get_byte(&s->
gb);
225 has_global_palette = (v & 0x80);
228 bytestream2_get_byte(&s->
gb);
230 av_dlog(s->
avctx,
"gif: screen_w=%d screen_h=%d bpp=%d global_palette=%d\n",
234 if (has_global_palette) {
246 int code = bytestream2_get_byte(&s->
gb);
282 int buf_size = avpkt->
size;