39 #define SCREEN_WIDE 640
40 #define SCREEN_HIGH 429
51 #define NEXT_BYTE(v) v = forward ? v + 1 : v - 1;
53 static int decode_bmv_frame(
const uint8_t *source,
int src_len, uint8_t *frame,
int frame_off)
55 int val, saved_val = 0;
57 const uint8_t *src, *source_end = source + src_len;
59 uint8_t *dst, *dst_end;
61 int forward = (frame_off <= -
SCREEN_WIDE) || (frame_off >= 0);
62 int read_two_nibbles, flag;
75 src = source + src_len - 1;
90 if (!mode || (tmplen == 4)) {
91 if (src < source || src >= source_end)
101 if (!read_two_nibbles) {
102 if (src < source || src >= source_end)
105 val |= *src << shift;
111 read_two_nibbles = 0;
113 mask = (1 << shift) - 1;
114 val = ((val >> 2) & ~mask) | (val &
mask);
116 if ((val & (0xC << shift))) {
127 saved_val = val >> (4 + shift);
129 val &= (1 << (shift + 4)) - 1;
132 advance_mode = val & 1;
133 len = (val >> 1) - 1;
134 mode += 1 + advance_mode;
143 frame_end - dst < frame_off + len)
145 for (i = 0; i <
len; i++)
146 dst[i] = dst[frame_off + i];
151 frame_end - dst < frame_off + len)
153 for (i = len - 1; i >= 0; i--)
154 dst[i] = dst[frame_off + i];
159 if (source + src_len - src < len)
161 memcpy(dst, src, len);
165 if (src - source < len)
169 memcpy(dst, src, len);
173 val = forward ? dst[-1] : dst[1];
175 memset(dst, val, len);
179 memset(dst, val, len);
196 uint8_t *srcptr, *outptr;
199 type = bytestream_get_byte(&c->
stream);
201 int blobs = bytestream_get_byte(&c->
stream);
202 if (pkt->
size < blobs * 65 + 2) {
209 int command_size = (type &
BMV_PRINT) ? 8 : 10;
214 c->
stream += command_size;
221 for (i = 0; i < 256; i++)
222 c->
pal[i] = bytestream_get_be24(&c->
stream);
229 scr_off = (int16_t)bytestream_get_le16(&c->
stream);
247 for (i = 0; i < avctx->
height; i++) {
248 memcpy(outptr, srcptr, avctx->
width);
249 srcptr += avctx->
width;
293 16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32
314 int *got_frame_ptr,
AVPacket *avpkt)
317 const uint8_t *buf = avpkt->
data;
318 int buf_size = avpkt->
size;
319 int blocks = 0, total_blocks, i;
321 int16_t *output_samples;
324 total_blocks = *buf++;
325 if (buf_size < total_blocks * 65 + 1) {
327 total_blocks * 65 + 1, buf_size);
337 output_samples = (int16_t *)c->
frame.
data[0];
339 for (blocks = 0; blocks < total_blocks; blocks++) {
340 uint8_t code = *buf++;
341 code = (code >> 1) | (code << 7);
344 for (i = 0; i < 32; i++) {
345 *output_samples++ = av_clip_int16((scale[0] * (int8_t)*buf++) >> 5);
346 *output_samples++ = av_clip_int16((scale[1] * (int8_t)*buf++) >> 5);