40 #define SCREEN_WIDE 640
41 #define SCREEN_HIGH 429
52 #define NEXT_BYTE(v) v = forward ? v + 1 : v - 1;
54 static int decode_bmv_frame(
const uint8_t *source,
int src_len, uint8_t *frame,
int frame_off)
56 int val, saved_val = 0;
58 const uint8_t *src, *source_end = source + src_len;
60 uint8_t *dst, *dst_end;
62 int forward = (frame_off <= -
SCREEN_WIDE) || (frame_off >= 0);
63 int read_two_nibbles, flag;
76 src = source + src_len - 1;
91 if (!mode || (tmplen == 4)) {
92 if (src < source || src >= source_end)
102 if (!read_two_nibbles) {
103 if (src < source || src >= source_end)
106 val |= *src << shift;
112 read_two_nibbles = 0;
114 mask = (1 << shift) - 1;
115 val = ((val >> 2) & ~mask) | (val &
mask);
117 if ((val & (0xC << shift))) {
128 saved_val = val >> (4 + shift);
130 val &= (1 << (shift + 4)) - 1;
133 advance_mode = val & 1;
134 len = (val >> 1) - 1;
135 mode += 1 + advance_mode;
138 if (len <= 0 ||
FFABS(dst_end - dst) <
len)
144 frame_end - dst < frame_off + len)
146 for (i = 0; i <
len; i++)
147 dst[i] = dst[frame_off + i];
152 frame_end - dst < frame_off + len)
154 for (i = len - 1; i >= 0; i--)
155 dst[i] = dst[frame_off + i];
160 if (source + src_len - src < len)
162 memcpy(dst, src, len);
166 if (src - source < len)
170 memcpy(dst, src, len);
174 val = forward ? dst[-1] : dst[1];
176 memset(dst, val, len);
180 memset(dst, val, len);
197 uint8_t *srcptr, *outptr;
200 type = bytestream_get_byte(&c->
stream);
202 int blobs = bytestream_get_byte(&c->
stream);
203 if (pkt->
size < blobs * 65 + 2) {
210 int command_size = (type &
BMV_PRINT) ? 8 : 10;
215 c->
stream += command_size;
222 for (i = 0; i < 256; i++)
223 c->
pal[i] = bytestream_get_be24(&c->
stream);
230 scr_off = (int16_t)bytestream_get_le16(&c->
stream);
248 for (i = 0; i < avctx->
height; i++) {
249 memcpy(outptr, srcptr, avctx->
width);
250 srcptr += avctx->
width;
294 16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32
315 int *got_frame_ptr,
AVPacket *avpkt)
318 const uint8_t *buf = avpkt->
data;
319 int buf_size = avpkt->
size;
320 int blocks = 0, total_blocks, i;
322 int16_t *output_samples;
325 total_blocks = *buf++;
326 if (buf_size < total_blocks * 65 + 1) {
328 total_blocks * 65 + 1, buf_size);
338 output_samples = (int16_t *)c->
frame.
data[0];
340 for (blocks = 0; blocks < total_blocks; blocks++) {
341 uint8_t code = *buf++;
342 code = (code >> 1) | (code << 7);
345 for (i = 0; i < 32; i++) {
346 *output_samples++ = av_clip_int16((scale[0] * (int8_t)*buf++) >> 5);
347 *output_samples++ = av_clip_int16((scale[1] * (int8_t)*buf++) >> 5);