50 #if CONFIG_ZLIB_DECODER
70 #if CONFIG_ZLIB_DECODER
80 static unsigned int mszh_decomp(
const unsigned char * srcptr,
int srclen,
unsigned char * destptr,
unsigned int destsize)
82 unsigned char *destptr_bak = destptr;
83 unsigned char *destptr_end = destptr + destsize;
84 const unsigned char *srcptr_end = srcptr + srclen;
85 unsigned mask = *srcptr++;
86 unsigned maskbit = 0x80;
88 while (srcptr < srcptr_end && destptr < destptr_end) {
89 if (!(mask & maskbit)) {
90 memcpy(destptr, srcptr, 4);
94 unsigned ofs = bytestream_get_le16(&srcptr);
95 unsigned cnt = (ofs >> 11) + 1;
97 ofs =
FFMIN(ofs, destptr - destptr_bak);
99 cnt =
FFMIN(cnt, destptr_end - destptr);
107 if (destptr_end - destptr < 32 || srcptr_end - srcptr < 32)
break;
108 memcpy(destptr, srcptr, 32);
117 return destptr - destptr_bak;
121 #if CONFIG_ZLIB_DECODER
129 static int zlib_decomp(
AVCodecContext *avctx,
const uint8_t *src,
int src_len,
int offset,
int expected)
132 int zret = inflateReset(&c->zstream);
134 av_log(avctx, AV_LOG_ERROR,
"Inflate reset error: %d\n", zret);
137 c->zstream.next_in = src;
138 c->zstream.avail_in = src_len;
141 zret = inflate(&c->zstream, Z_FINISH);
142 if (zret != Z_OK && zret != Z_STREAM_END) {
143 av_log(avctx, AV_LOG_ERROR,
"Inflate error: %d\n", zret);
146 if (expected != (
unsigned int)c->zstream.total_out) {
147 av_log(avctx, AV_LOG_ERROR,
"Decoded size differs (%d != %lu)\n",
148 expected, c->zstream.total_out);
151 return c->zstream.total_out;
164 int buf_size = avpkt->
size;
166 unsigned char *encoded = (
unsigned char *)buf;
167 unsigned int pixel_ptr;
169 unsigned char *outptr;
170 uint8_t *y_out, *u_out, *v_out;
173 unsigned int mszh_dlen;
174 unsigned char yq, y1q, uq, vq;
176 unsigned int mthread_inlen, mthread_outlen;
177 unsigned int len = buf_size;
197 mthread_inlen =
AV_RL32(encoded);
198 mthread_inlen =
FFMIN(mthread_inlen, len - 8);
199 mthread_outlen =
AV_RL32(encoded+4);
202 if (mthread_outlen != mszh_dlen) {
204 mthread_outlen, mszh_dlen);
207 mszh_dlen =
mszh_decomp(encoded + 8 + mthread_inlen, len - 8 - mthread_inlen,
209 if (mthread_outlen != mszh_dlen) {
211 mthread_outlen, mszh_dlen);
246 if (len < ((width * height * bppx2) >> 1))
255 #if CONFIG_ZLIB_DECODER
261 len == width * height * 3) {
270 mthread_inlen =
AV_RL32(encoded);
271 mthread_inlen =
FFMIN(mthread_inlen, len - 8);
272 mthread_outlen =
AV_RL32(encoded+4);
274 ret = zlib_decomp(avctx, encoded + 8, mthread_inlen, 0, mthread_outlen);
275 if (ret < 0)
return ret;
276 ret = zlib_decomp(avctx, encoded + 8 + mthread_inlen, len - 8 - mthread_inlen,
277 mthread_outlen, mthread_outlen);
278 if (ret < 0)
return ret;
280 int ret = zlib_decomp(avctx, encoded, len, 0, c->
decomp_size);
281 if (ret < 0)
return ret;
288 av_log(avctx,
AV_LOG_ERROR,
"BUG! Unknown codec in frame decoder compression switch.\n");
298 for (row = 0; row <
height; row++) {
299 pixel_ptr = row * width * 3;
300 yq = encoded[pixel_ptr++];
301 uqvq =
AV_RL16(encoded+pixel_ptr);
303 for (col = 1; col <
width; col++) {
304 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
305 uqvq -=
AV_RL16(encoded+pixel_ptr+1);
306 AV_WL16(encoded+pixel_ptr+1, uqvq);
312 for (row = 0; row <
height; row++) {
313 pixel_ptr = row * width * 2;
315 for (col = 0; col < width/4; col++) {
316 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
317 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
318 encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
319 encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
320 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
321 encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
322 encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
323 encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
329 for (row = 0; row <
height; row++) {
330 pixel_ptr = row * width / 2 * 3;
332 for (col = 0; col < width/4; col++) {
333 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
334 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
335 encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
336 encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
337 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
338 encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
344 for (row = 0; row <
height; row++) {
345 pixel_ptr = row * width * 2;
347 for (col = 0; col < width/2; col++) {
348 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
349 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
350 encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
351 encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
357 for (row = 0; row < height/2; row++) {
358 pixel_ptr = row * width * 3;
359 yq = y1q = uq = vq =0;
360 for (col = 0; col < width/2; col++) {
361 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
362 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
363 encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
364 encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
365 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
366 encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
383 for (row = 0; row <
height; row++) {
384 for (col = 0; col <
width; col++) {
385 y_out[col] = *encoded++;
386 u_out[col] = *encoded++ + 128;
387 v_out[col] = *encoded++ + 128;
395 for (row = 0; row <
height; row++) {
396 for (col = 0; col < width - 3; col += 4) {
397 memcpy(y_out + col, encoded, 4);
399 u_out[ col >> 1 ] = *encoded++ + 128;
400 u_out[(col >> 1) + 1] = *encoded++ + 128;
401 v_out[ col >> 1 ] = *encoded++ + 128;
402 v_out[(col >> 1) + 1] = *encoded++ + 128;
410 for (row = height - 1; row >= 0; row--) {
412 memcpy(outptr + pixel_ptr, encoded, 3 * width);
413 encoded += 3 *
width;
417 for (row = 0; row <
height; row++) {
418 for (col = 0; col < width - 3; col += 4) {
419 memcpy(y_out + col, encoded, 4);
421 u_out[col >> 2] = *encoded++ + 128;
422 v_out[col >> 2] = *encoded++ + 128;
430 for (row = 0; row <
height; row++) {
431 for (col = 0; col < width - 1; col += 2) {
432 memcpy(y_out + col, encoded, 2);
434 u_out[col >> 1] = *encoded++ + 128;
435 v_out[col >> 1] = *encoded++ + 128;
445 for (row = 0; row < height - 1; row += 2) {
446 for (col = 0; col < width - 1; col += 2) {
447 memcpy(y_out + col, encoded, 2);
449 memcpy(y_out + col - c->
pic.
linesize[0], encoded, 2);
451 u_out[col >> 1] = *encoded++ + 128;
452 v_out[col >> 1] = *encoded++ + 128;
479 unsigned int basesize = avctx->
width * avctx->
height;
482 unsigned int max_decomp_size;
492 av_log(avctx,
AV_LOG_ERROR,
"Codec id and codec type mismatch. This should not happen.\n");
499 max_decomp_size = max_basesize * 3;
505 max_decomp_size = max_basesize * 2;
511 max_decomp_size = max_basesize * 3;
517 max_decomp_size = max_basesize / 2 * 3;
523 max_decomp_size = max_basesize * 2;
529 max_decomp_size = max_basesize / 2 * 3;
555 #if CONFIG_ZLIB_DECODER
601 #if CONFIG_ZLIB_DECODER
604 c->zstream.zalloc = Z_NULL;
605 c->zstream.zfree = Z_NULL;
606 c->zstream.opaque = Z_NULL;
607 zret = inflateInit(&c->zstream);
631 #if CONFIG_ZLIB_DECODER
633 inflateEnd(&c->zstream);
639 #if CONFIG_MSZH_DECODER
648 .capabilities = CODEC_CAP_DR1,
653 #if CONFIG_ZLIB_DECODER
662 .capabilities = CODEC_CAP_DR1,