optimize IDCT of rows with mostly zero coefficients
[libav.git] / libavformat / asf.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * ASF compatible demuxer
19720f15 3 * Copyright (c) 2000, 2001 Fabrice Bellard.
de6d9b64 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
de6d9b64 21#include "avformat.h"
9d9f4119 22#include "riff.h"
f80c1ac0 23#include "mpegaudio.h"
542993b0 24#include "asf.h"
db5c43b4 25#include "common.h"
de6d9b64 26
580fb5e7
MN
27#undef NDEBUG
28#include <assert.h>
29
615b92fd 30#define FRAME_HEADER_SIZE 17
115329f1 31// Fix Me! FRAME_HEADER_SIZE may be different.
615b92fd 32
de6d9b64 33static const GUID index_guid = {
24c14d6d 34 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
de6d9b64
FB
35};
36
de6d9b64
FB
37/**********************************/
38/* decoding */
39
40//#define DEBUG
41
42#ifdef DEBUG
5082f759
FR
43#define PRINT_IF_GUID(g,cmp) \
44if (!memcmp(g, &cmp, sizeof(GUID))) \
45 printf("(GUID: %s) ", #cmp)
46
de6d9b64
FB
47static void print_guid(const GUID *g)
48{
49 int i;
5082f759
FR
50 PRINT_IF_GUID(g, asf_header);
51 else PRINT_IF_GUID(g, file_header);
52 else PRINT_IF_GUID(g, stream_header);
53 else PRINT_IF_GUID(g, audio_stream);
54 else PRINT_IF_GUID(g, audio_conceal_none);
55 else PRINT_IF_GUID(g, video_stream);
56 else PRINT_IF_GUID(g, video_conceal_none);
ae38261e 57 else PRINT_IF_GUID(g, command_stream);
5082f759
FR
58 else PRINT_IF_GUID(g, comment_header);
59 else PRINT_IF_GUID(g, codec_comment_header);
60 else PRINT_IF_GUID(g, codec_comment1_header);
61 else PRINT_IF_GUID(g, data_header);
62 else PRINT_IF_GUID(g, index_guid);
63 else PRINT_IF_GUID(g, head1_guid);
64 else PRINT_IF_GUID(g, head2_guid);
65 else PRINT_IF_GUID(g, my_guid);
88141c91
MN
66 else PRINT_IF_GUID(g, ext_stream_header);
67 else PRINT_IF_GUID(g, extended_content_header);
68 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
69 else PRINT_IF_GUID(g, ext_stream_audio_stream);
5082f759
FR
70 else
71 printf("(GUID: unknown) ");
24c14d6d
MN
72 for(i=0;i<16;i++)
73 printf(" 0x%02x,", (*g)[i]);
de6d9b64
FB
74 printf("}\n");
75}
6df84c3a 76#undef PRINT_IF_GUID
de6d9b64
FB
77#endif
78
79static void get_guid(ByteIOContext *s, GUID *g)
80{
24c14d6d
MN
81 assert(sizeof(*g) == 16);
82 get_buffer(s, g, sizeof(*g));
de6d9b64
FB
83}
84
85#if 0
86static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
87{
88 int len, c;
89 char *q;
90
91 len = get_le16(pb);
92 q = buf;
93 while (len > 0) {
94 c = get_le16(pb);
95 if ((q - buf) < buf_size - 1)
96 *q++ = c;
97 len--;
98 }
99 *q = '\0';
100}
101#endif
102
103static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
104{
db5c43b4
ZM
105 char* q = buf;
106 len /= 2;
107 while (len--) {
108 uint8_t tmp;
109 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
de6d9b64
FB
110 }
111 *q = '\0';
112}
113
c9a65ca8
FB
114static int asf_probe(AVProbeData *pd)
115{
c9a65ca8
FB
116 /* check file header */
117 if (pd->buf_size <= 32)
118 return 0;
c9a65ca8 119
24c14d6d 120 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
c9a65ca8
FB
121 return AVPROBE_SCORE_MAX;
122 else
123 return 0;
124}
125
de6d9b64
FB
126static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
127{
c9a65ca8 128 ASFContext *asf = s->priv_data;
de6d9b64
FB
129 GUID g;
130 ByteIOContext *pb = &s->pb;
131 AVStream *st;
132 ASFStream *asf_st;
e095026a 133 int size, i;
0c1a9eda 134 int64_t gsize;
de6d9b64 135
de6d9b64
FB
136 get_guid(pb, &g);
137 if (memcmp(&g, &asf_header, sizeof(GUID)))
138 goto fail;
139 get_le64(pb);
140 get_le32(pb);
141 get_byte(pb);
142 get_byte(pb);
2141dc37 143 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64
FB
144 for(;;) {
145 get_guid(pb, &g);
146 gsize = get_le64(pb);
147#ifdef DEBUG
949b1a13 148 printf("%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 149 print_guid(&g);
949b1a13 150 printf(" size=0x%"PRIx64"\n", gsize);
de6d9b64
FB
151#endif
152 if (gsize < 24)
153 goto fail;
154 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 155 get_guid(pb, &asf->hdr.guid);
bb270c08
DB
156 asf->hdr.file_size = get_le64(pb);
157 asf->hdr.create_time = get_le64(pb);
6bb2a2df 158 asf->nb_packets = get_le64(pb);
bb270c08
DB
159 asf->hdr.send_time = get_le64(pb);
160 asf->hdr.play_time = get_le64(pb);
161 asf->hdr.preroll = get_le32(pb);
162 asf->hdr.ignore = get_le32(pb);
163 asf->hdr.flags = get_le32(pb);
164 asf->hdr.min_pktsize = get_le32(pb);
165 asf->hdr.max_pktsize = get_le32(pb);
166 asf->hdr.max_bitrate = get_le32(pb);
167 asf->packet_size = asf->hdr.max_pktsize;
de6d9b64 168 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
7ad5455c
MN
169 int type, type_specific_size, sizeX;
170 uint64_t total_size;
de6d9b64 171 unsigned int tag1;
0c1a9eda 172 int64_t pos1, pos2;
88141c91 173 int test_for_ext_stream_audio;
2a10020b 174
de6d9b64
FB
175 pos1 = url_ftell(pb);
176
247eadca 177 st = av_new_stream(s, 0);
de6d9b64
FB
178 if (!st)
179 goto fail;
9ee91c2f 180 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
de6d9b64
FB
181 asf_st = av_mallocz(sizeof(ASFStream));
182 if (!asf_st)
183 goto fail;
184 st->priv_data = asf_st;
c0df9d75 185 st->start_time = asf->hdr.preroll;
73fe1052
RM
186 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
187 st->duration = asf->hdr.send_time /
188 (10000000 / 1000) - st->start_time;
189 }
de6d9b64 190 get_guid(pb, &g);
88141c91
MN
191
192 test_for_ext_stream_audio = 0;
de6d9b64
FB
193 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
194 type = CODEC_TYPE_AUDIO;
195 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
196 type = CODEC_TYPE_VIDEO;
ae38261e
MB
197 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
198 type = CODEC_TYPE_UNKNOWN;
88141c91
MN
199 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
200 test_for_ext_stream_audio = 1;
201 type = CODEC_TYPE_UNKNOWN;
de6d9b64
FB
202 } else {
203 goto fail;
204 }
205 get_guid(pb, &g);
206 total_size = get_le64(pb);
2e7973bb 207 type_specific_size = get_le32(pb);
de6d9b64 208 get_le32(pb);
bb270c08 209 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 210 // mapping of asf ID to AV stream ID;
247eadca 211 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 212
de6d9b64 213 get_le32(pb);
88141c91
MN
214
215 if (test_for_ext_stream_audio) {
216 get_guid(pb, &g);
217 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
218 type = CODEC_TYPE_AUDIO;
219 get_guid(pb, &g);
220 get_le32(pb);
221 get_le32(pb);
222 get_le32(pb);
223 get_guid(pb, &g);
224 get_le32(pb);
225 }
226 }
227
bb270c08 228 st->codec->codec_type = type;
de6d9b64 229 if (type == CODEC_TYPE_AUDIO) {
01f4895c 230 get_wav_header(pb, st->codec, type_specific_size);
afda223c 231 st->need_parsing = 1;
bb270c08
DB
232 /* We have to init the frame size at some point .... */
233 pos2 = url_ftell(pb);
234 if (gsize > (pos2 + 8 - pos1 + 24)) {
235 asf_st->ds_span = get_byte(pb);
236 asf_st->ds_packet_size = get_le16(pb);
237 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
238 get_le16(pb); //ds_data_size
239 get_byte(pb); //ds_silence_data
bb270c08
DB
240 }
241 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
242 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
243 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
244 if (asf_st->ds_span > 1) {
245 if (!asf_st->ds_chunk_size
05219463
MN
246 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
247 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
248 asf_st->ds_span = 0; // disable descrambling
249 }
01f4895c 250 switch (st->codec->codec_id) {
80783dc2 251 case CODEC_ID_MP3:
01f4895c 252 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
253 break;
254 case CODEC_ID_PCM_S16LE:
255 case CODEC_ID_PCM_S16BE:
256 case CODEC_ID_PCM_U16LE:
257 case CODEC_ID_PCM_U16BE:
258 case CODEC_ID_PCM_S8:
259 case CODEC_ID_PCM_U8:
260 case CODEC_ID_PCM_ALAW:
261 case CODEC_ID_PCM_MULAW:
01f4895c 262 st->codec->frame_size = 1;
f80c1ac0
PG
263 break;
264 default:
265 /* This is probably wrong, but it prevents a crash later */
01f4895c 266 st->codec->frame_size = 1;
f80c1ac0
PG
267 break;
268 }
88141c91 269 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 270 get_le32(pb);
de6d9b64
FB
271 get_le32(pb);
272 get_byte(pb);
273 size = get_le16(pb); /* size */
0ffd77b9 274 sizeX= get_le32(pb); /* size */
01f4895c 275 st->codec->width = get_le32(pb);
bb270c08 276 st->codec->height = get_le32(pb);
2a10020b 277 /* not available for asf */
de6d9b64 278 get_le16(pb); /* panes */
bb270c08 279 st->codec->bits_per_sample = get_le16(pb); /* depth */
de6d9b64 280 tag1 = get_le32(pb);
bb270c08 281 url_fskip(pb, 20);
0ffd77b9
MN
282// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
283 size= sizeX;
bb270c08
DB
284 if (size > 40) {
285 st->codec->extradata_size = size - 40;
286 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
287 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
288 }
5e29abf8
RT
289
290 /* Extract palette from extradata if bpp <= 8 */
291 /* This code assumes that extradata contains only palette */
292 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
293 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
294 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 295#ifdef WORDS_BIGENDIAN
01f4895c
MN
296 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
297 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 298#else
01f4895c
MN
299 memcpy(st->codec->palctrl->palette, st->codec->extradata,
300 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 301#endif
01f4895c 302 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
303 }
304
01f4895c 305 st->codec->codec_tag = tag1;
bb270c08 306 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4
MN
307 if(tag1 == MKTAG('D', 'V', 'R', ' '))
308 st->need_parsing = 1;
de6d9b64
FB
309 }
310 pos2 = url_ftell(pb);
311 url_fskip(pb, gsize - (pos2 - pos1 + 24));
312 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
b6eaae39 313 asf->data_object_offset = url_ftell(pb);
73fe1052
RM
314 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
315 if (!(asf->hdr.flags & 0x01) && gsize != (uint64_t)-1 && gsize >= 24) {
b6eaae39
KED
316 asf->data_object_size = gsize - 24;
317 } else {
318 asf->data_object_size = (uint64_t)-1;
319 }
de6d9b64
FB
320 break;
321 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
322 int len1, len2, len3, len4, len5;
323
324 len1 = get_le16(pb);
325 len2 = get_le16(pb);
326 len3 = get_le16(pb);
327 len4 = get_le16(pb);
328 len5 = get_le16(pb);
4e15cc8b
MN
329 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
330 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
de6d9b64 331 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
4e15cc8b 332 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
bb270c08 333 url_fskip(pb, len5);
d13431cd
KK
334 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
335 int desc_count, i;
336
337 desc_count = get_le16(pb);
338 for(i=0;i<desc_count;i++)
339 {
052aa2ad
SH
340 int name_len,value_type,value_len;
341 uint64_t value_num = 0;
d045b8c1 342 char name[1024];
d13431cd
KK
343
344 name_len = get_le16(pb);
d045b8c1 345 get_str16_nolen(pb, name_len, name, sizeof(name));
d13431cd
KK
346 value_type = get_le16(pb);
347 value_len = get_le16(pb);
348 if ((value_type == 0) || (value_type == 1)) // unicode or byte
349 {
5e2a4855
MN
350 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
351 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
352 else url_fskip(pb, value_len);
d13431cd 353 }
724dc20c 354 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
d13431cd
KK
355 {
356 if (value_type==2) value_num = get_le32(pb);
357 if (value_type==3) value_num = get_le32(pb);
358 if (value_type==4) value_num = get_le64(pb);
359 if (value_type==5) value_num = get_le16(pb);
4e15cc8b
MN
360 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
361 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
d13431cd 362 }
d13431cd 363 }
88141c91
MN
364 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
365 int ext_len, payload_ext_ct, stream_ct;
366 uint32_t ext_d;
1bd86246 367 int64_t pos_ex_st;
88141c91
MN
368 pos_ex_st = url_ftell(pb);
369
de3ae959
MN
370 get_le64(pb); // starttime
371 get_le64(pb); // endtime
372 get_le32(pb); // leak-datarate
373 get_le32(pb); // bucket-datasize
374 get_le32(pb); // init-bucket-fullness
375 get_le32(pb); // alt-leak-datarate
376 get_le32(pb); // alt-bucket-datasize
377 get_le32(pb); // alt-init-bucket-fullness
378 get_le32(pb); // max-object-size
379 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
380 get_le16(pb); // stream-num
381 get_le16(pb); // stream-language-id-index
382 get_le64(pb); // avg frametime in 100ns units
383 stream_ct = get_le16(pb); //stream-name-count
384 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91
MN
385
386 for (i=0; i<stream_ct; i++){
387 get_le16(pb);
388 ext_len = get_le16(pb);
389 url_fseek(pb, ext_len, SEEK_CUR);
390 }
391
392 for (i=0; i<payload_ext_ct; i++){
393 get_guid(pb, &g);
394 ext_d=get_le16(pb);
395 ext_len=get_le32(pb);
396 url_fseek(pb, ext_len, SEEK_CUR);
397 }
398
399 // there could be a optional stream properties object to follow
400 // if so the next iteration will pick it up
de6d9b64
FB
401 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
402 int v1, v2;
403 get_guid(pb, &g);
404 v1 = get_le32(pb);
405 v2 = get_le16(pb);
88141c91 406#if 0
de6d9b64
FB
407 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
408 int len, v1, n, num;
409 char str[256], *q;
410 char tag[16];
411
412 get_guid(pb, &g);
413 print_guid(&g);
2a10020b 414
de6d9b64
FB
415 n = get_le32(pb);
416 for(i=0;i<n;i++) {
417 num = get_le16(pb); /* stream number */
418 get_str16(pb, str, sizeof(str));
419 get_str16(pb, str, sizeof(str));
420 len = get_le16(pb);
421 q = tag;
422 while (len > 0) {
423 v1 = get_byte(pb);
424 if ((q - tag) < sizeof(tag) - 1)
425 *q++ = v1;
426 len--;
427 }
428 *q = '\0';
429 }
430#endif
431 } else if (url_feof(pb)) {
432 goto fail;
433 } else {
434 url_fseek(pb, gsize - 24, SEEK_CUR);
435 }
436 }
437 get_guid(pb, &g);
438 get_le64(pb);
439 get_byte(pb);
440 get_byte(pb);
2141dc37
ZK
441 if (url_feof(pb))
442 goto fail;
443 asf->data_offset = url_ftell(pb);
de6d9b64
FB
444 asf->packet_size_left = 0;
445
446 return 0;
447
448 fail:
4c3dff6d 449 for(i=0;i<s->nb_streams;i++) {
de6d9b64 450 AVStream *st = s->streams[i];
bb270c08
DB
451 if (st) {
452 av_free(st->priv_data);
01f4895c 453 av_free(st->codec->extradata);
bb270c08 454 }
1ea4f593 455 av_free(st);
de6d9b64 456 }
de6d9b64
FB
457 return -1;
458}
459
2a10020b
ZK
460#define DO_2BITS(bits, var, defval) \
461 switch (bits & 3) \
462 { \
463 case 3: var = get_le32(pb); rsize += 4; break; \
464 case 2: var = get_le16(pb); rsize += 2; break; \
465 case 1: var = get_byte(pb); rsize++; break; \
466 default: var = defval; break; \
467 }
468
f7835507
MN
469/**
470 *
471 * @return <0 in case of an error
472 */
de6d9b64
FB
473static int asf_get_packet(AVFormatContext *s)
474{
475 ASFContext *asf = s->priv_data;
476 ByteIOContext *pb = &s->pb;
2a10020b 477 uint32_t packet_length, padsize;
29962fea 478 int rsize = 9;
0fd9e6f3
MN
479 int c, d, e, off;
480
481 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
482
483 c=d=e=-1;
484 while(off-- > 0){
485 c=d; d=e;
486 e= get_byte(pb);
487 if(c == 0x82 && !d && !e)
488 break;
489 }
115329f1 490
1359c2d4 491 if (c != 0x82) {
5acdd6e6 492 if (!url_feof(pb))
bb270c08 493 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b
ZK
494 }
495 if ((c & 0x0f) == 2) { // always true for now
0fd9e6f3 496 if (d || e) {
5acdd6e6 497 if (!url_feof(pb))
bb270c08 498 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 499 return -1;
bb270c08 500 }
0fd9e6f3
MN
501 d= get_byte(pb);
502 e= get_byte(pb);
29962fea
MN
503 rsize+=2;
504/* }else{
505 if (!url_feof(pb))
949b1a13 506 printf("ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
bb270c08 507 return AVERROR_IO;*/
de6d9b64 508 }
2a10020b 509
0fd9e6f3
MN
510 asf->packet_flags = d;
511 asf->packet_property = e;
2a10020b
ZK
512
513 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
514 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
515 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
516
5b11e081
MN
517 //the following checks prevent overflows and infinite loops
518 if(packet_length >= (1U<<29)){
519 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 520 return -1;
5b11e081 521 }
92216453 522 if(padsize >= packet_length){
5b11e081 523 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 524 return -1;
5b11e081
MN
525 }
526
2a10020b 527 asf->packet_timestamp = get_le32(pb);
de6d9b64 528 get_le16(pb); /* duration */
2141dc37 529 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
530
531 if (asf->packet_flags & 0x01) {
bb270c08 532 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
533 asf->packet_segments = asf->packet_segsizetype & 0x3f;
534 } else {
bb270c08 535 asf->packet_segments = 1;
2a10020b
ZK
536 asf->packet_segsizetype = 0x80;
537 }
538 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
539 if (packet_length < asf->hdr.min_pktsize)
540 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 541 asf->packet_padsize = padsize;
de6d9b64 542#ifdef DEBUG
2a10020b 543 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 544#endif
de6d9b64
FB
545 return 0;
546}
547
ae60a857
MN
548/**
549 *
550 * @return <0 if error
551 */
552static int asf_read_frame_header(AVFormatContext *s){
553 ASFContext *asf = s->priv_data;
554 ByteIOContext *pb = &s->pb;
555 int rsize = 1;
556 int num = get_byte(pb);
557
558 asf->packet_segments--;
559 asf->packet_key_frame = num >> 7;
560 asf->stream_index = asf->asfid2avid[num & 0x7f];
561 // sequence should be ignored!
562 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
563 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
564 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
565//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
566 if (asf->packet_replic_size >= 8) {
567 asf->packet_obj_size = get_le32(pb);
568 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
569 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
570 return -1;
571 }
572 asf->packet_frag_timestamp = get_le32(pb); // timestamp
573 url_fskip(pb, asf->packet_replic_size - 8);
574 rsize += asf->packet_replic_size; // FIXME - check validity
575 } else if (asf->packet_replic_size==1){
576 // multipacket - frag_offset is begining timestamp
577 asf->packet_time_start = asf->packet_frag_offset;
578 asf->packet_frag_offset = 0;
579 asf->packet_frag_timestamp = asf->packet_timestamp;
580
581 asf->packet_time_delta = get_byte(pb);
582 rsize++;
583 }else if(asf->packet_replic_size!=0){
584 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
585 return -1;
586 }
587 if (asf->packet_flags & 0x01) {
588 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
589 if(asf->packet_frag_size > asf->packet_size_left - rsize){
590 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
591 return -1;
592 }
ae60a857
MN
593 //printf("Fragsize %d\n", asf->packet_frag_size);
594 } else {
595 asf->packet_frag_size = asf->packet_size_left - rsize;
596 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
597 }
598 if (asf->packet_replic_size == 1) {
599 asf->packet_multi_size = asf->packet_frag_size;
600 if (asf->packet_multi_size > asf->packet_size_left)
601 return -1;
602 }
603 asf->packet_size_left -= rsize;
604 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
605
606 return 0;
607}
608
de6d9b64
FB
609static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
610{
611 ASFContext *asf = s->priv_data;
2a10020b 612 ASFStream *asf_st = 0;
de6d9b64 613 ByteIOContext *pb = &s->pb;
1359c2d4 614 //static int pc = 0;
2a10020b 615 for (;;) {
ceba96cb
MN
616 if(url_feof(pb))
617 return AVERROR_IO;
bb270c08
DB
618 if (asf->packet_size_left < FRAME_HEADER_SIZE
619 || asf->packet_segments < 1) {
620 //asf->packet_size_left <= asf->packet_padsize) {
621 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 622 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 623 assert(ret>=0);
bb270c08
DB
624 /* fail safe */
625 url_fskip(pb, ret);
b04d5d31 626
82b9e4a2 627 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
628 if (asf->data_object_size != (uint64_t)-1 &&
629 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
630 return AVERROR_IO; /* Do not exceed the size of the data object */
bb270c08
DB
631 ret = asf_get_packet(s);
632 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
ceba96cb
MN
633 if (ret < 0)
634 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
2141dc37 635 asf->packet_time_start = 0;
2a10020b 636 continue;
bb270c08
DB
637 }
638 if (asf->packet_time_start == 0) {
ae60a857
MN
639 if(asf_read_frame_header(s) < 0){
640 asf->packet_segments= 0;
236116cb 641 continue;
1305a9d5 642 }
bb270c08 643 if (asf->stream_index < 0
f3356e9c
MN
644 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
645 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
646 ) {
1359c2d4 647 asf->packet_time_start = 0;
bb270c08
DB
648 /* unhandled packet (should not happen) */
649 url_fskip(pb, asf->packet_frag_size);
650 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 651 if(asf->stream_index < 0)
ae60a857 652 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 653 continue;
bb270c08
DB
654 }
655 asf->asf_st = s->streams[asf->stream_index]->priv_data;
656 }
657 asf_st = asf->asf_st;
658
bb270c08
DB
659 if (asf->packet_replic_size == 1) {
660 // frag_offset is here used as the begining timestamp
661 asf->packet_frag_timestamp = asf->packet_time_start;
662 asf->packet_time_start += asf->packet_time_delta;
663 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
664 asf->packet_size_left--;
2141dc37 665 asf->packet_multi_size--;
bb270c08
DB
666 if (asf->packet_multi_size < asf->packet_obj_size)
667 {
668 asf->packet_time_start = 0;
669 url_fskip(pb, asf->packet_multi_size);
670 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 671 continue;
bb270c08
DB
672 }
673 asf->packet_multi_size -= asf->packet_obj_size;
674 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
675 }
f8f0a0bd
MN
676 if ( asf_st->pkt.size != asf->packet_obj_size
677 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
678 if(asf_st->pkt.data){
679 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
680 asf_st->frag_offset = 0;
681 av_free_packet(&asf_st->pkt);
682 }
bb270c08
DB
683 /* new packet */
684 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
685 asf_st->seq = asf->packet_seq;
686 asf_st->pkt.pts = asf->packet_frag_timestamp;
687 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
688 asf_st->pkt.pos =
689 asf_st->packet_pos= asf->packet_pos;
690//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 691//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 692//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
693 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
694 asf->packet_key_frame = 1;
695 if (asf->packet_key_frame)
696 asf_st->pkt.flags |= PKT_FLAG_KEY;
697 }
698
699 /* read data */
700 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
701 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
702 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
703 asf->packet_size_left -= asf->packet_frag_size;
704 if (asf->packet_size_left < 0)
2141dc37 705 continue;
4c71d727
MN
706
707 if( asf->packet_frag_offset >= asf_st->pkt.size
708 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
709 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
710 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
711 continue;
712 }
713
bb270c08
DB
714 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
715 asf->packet_frag_size);
716 asf_st->frag_offset += asf->packet_frag_size;
717 /* test if whole packet is read */
718 if (asf_st->frag_offset == asf_st->pkt.size) {
719 /* return packet */
720 if (asf_st->ds_span > 1) {
05219463
MN
721 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
722 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
723 }else{
bb270c08 724 /* packet descrambling */
191e8ca7 725 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
726 if (newdata) {
727 int offset = 0;
728 while (offset < asf_st->pkt.size) {
729 int off = offset / asf_st->ds_chunk_size;
730 int row = off / asf_st->ds_span;
731 int col = off % asf_st->ds_span;
732 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
733 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
734
735 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
736 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
737 memcpy(newdata + offset,
738 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
739 asf_st->ds_chunk_size);
740 offset += asf_st->ds_chunk_size;
741 }
742 av_free(asf_st->pkt.data);
743 asf_st->pkt.data = newdata;
744 }
05219463 745 }
bb270c08
DB
746 }
747 asf_st->frag_offset = 0;
b83e83b9 748 *pkt= asf_st->pkt;
bb270c08
DB
749 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
750 asf_st->pkt.size = 0;
751 asf_st->pkt.data = 0;
752 break; // packet completed
753 }
de6d9b64 754 }
de6d9b64
FB
755 return 0;
756}
757
758static int asf_read_close(AVFormatContext *s)
759{
de6d9b64
FB
760 int i;
761
762 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
763 AVStream *st = s->streams[i];
764 av_free(st->priv_data);
1ae7518d 765 av_free(st->codec->palctrl);
de6d9b64 766 }
de6d9b64
FB
767 return 0;
768}
769
38376f00
KK
770// Added to support seeking after packets have been read
771// If information is not reset, read_packet fails due to
772// leftover information from previous reads
773static void asf_reset_header(AVFormatContext *s)
774{
775 ASFContext *asf = s->priv_data;
82b9e4a2
MN
776 ASFStream *asf_st;
777 int i;
38376f00
KK
778
779 asf->packet_nb_frames = 0;
38376f00
KK
780 asf->packet_size_left = 0;
781 asf->packet_segments = 0;
782 asf->packet_flags = 0;
783 asf->packet_property = 0;
784 asf->packet_timestamp = 0;
785 asf->packet_segsizetype = 0;
786 asf->packet_segments = 0;
787 asf->packet_seq = 0;
788 asf->packet_replic_size = 0;
789 asf->packet_key_frame = 0;
790 asf->packet_padsize = 0;
791 asf->packet_frag_offset = 0;
792 asf->packet_frag_size = 0;
793 asf->packet_frag_timestamp = 0;
794 asf->packet_multi_size = 0;
795 asf->packet_obj_size = 0;
796 asf->packet_time_delta = 0;
797 asf->packet_time_start = 0;
115329f1 798
82b9e4a2
MN
799 for(i=0; i<s->nb_streams; i++){
800 asf_st= s->streams[i]->priv_data;
801 av_free_packet(&asf_st->pkt);
802 asf_st->frag_offset=0;
803 asf_st->seq=0;
804 }
805 asf->asf_st= NULL;
38376f00
KK
806}
807
8d14a25c 808static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
809{
810 ASFContext *asf = s->priv_data;
811 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 812 ASFStream *asf_st;
580fb5e7 813 int64_t pts;
82b9e4a2 814 int64_t pos= *ppos;
3e9245a9
MN
815 int i;
816 int64_t start_pos[s->nb_streams];
115329f1 817
3e9245a9
MN
818 for(i=0; i<s->nb_streams; i++){
819 start_pos[i]= pos;
820 }
115329f1 821
8d14a25c
MN
822 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
823 *ppos= pos;
824 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 825
82b9e4a2 826//printf("asf_read_pts\n");
82b9e4a2 827 asf_reset_header(s);
3e9245a9 828 for(;;){
82b9e4a2 829 if (av_read_frame(s, pkt) < 0){
0b93103a 830 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 831 return AV_NOPTS_VALUE;
82b9e4a2 832 }
115329f1 833
38cf2a72 834 pts= pkt->pts;
580fb5e7
MN
835
836 av_free_packet(pkt);
3e9245a9
MN
837 if(pkt->flags&PKT_FLAG_KEY){
838 i= pkt->stream_index;
839
840 asf_st= s->streams[i]->priv_data;
841
0fd9e6f3 842// assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 843 pos= asf_st->packet_pos;
09646bab 844
52e54612 845 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 846 start_pos[i]= asf_st->packet_pos + 1;
115329f1 847
3e9245a9
MN
848 if(pkt->stream_index == stream_index)
849 break;
850 }
851 }
852
853 *ppos= pos;
949b1a13 854//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
580fb5e7
MN
855
856 return pts;
38376f00
KK
857}
858
56c96a22
MN
859static void asf_build_simple_index(AVFormatContext *s, int stream_index)
860{
861 GUID g;
862 ASFContext *asf = s->priv_data;
863 int64_t gsize, itime;
864 int64_t pos, current_pos, index_pts;
865 int i;
866 int pct,ict;
867
868 current_pos = url_ftell(&s->pb);
869
870 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
871 get_guid(&s->pb, &g);
872 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
873 gsize = get_le64(&s->pb);
874 get_guid(&s->pb, &g);
875 itime=get_le64(&s->pb);
876 pct=get_le32(&s->pb);
877 ict=get_le32(&s->pb);
ccd3228e 878 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
56c96a22
MN
879
880 for (i=0;i<ict;i++){
881 int pktnum=get_le32(&s->pb);
882 int pktct =get_le16(&s->pb);
883 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
884
885 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
886 index_pts=av_rescale(itime, i, 10000);
887
888 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
889 }
52e54612 890 asf->index_read= 1;
56c96a22
MN
891 }
892 url_fseek(&s->pb, current_pos, SEEK_SET);
893}
894
3ba1438d 895static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 896{
afda223c 897 ASFContext *asf = s->priv_data;
56c96a22
MN
898 AVStream *st = s->streams[stream_index];
899 int64_t pos;
900 int index;
115329f1 901
a602556e 902 if (asf->packet_size <= 0)
38376f00
KK
903 return -1;
904
52e54612 905 if (!asf->index_read)
56c96a22
MN
906 asf_build_simple_index(s, stream_index);
907
52e54612 908 if(!(asf->index_read && st->index_entries)){
56c96a22
MN
909 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
910 return -1;
911 }else{
912 index= av_index_search_timestamp(st, pts, flags);
913 if(index<0)
914 return -1;
915
916 /* find the position */
917 pos = st->index_entries[index].pos;
918 pts = st->index_entries[index].timestamp;
919
920 // various attempts to find key frame have failed so far
921 // asf_reset_header(s);
922 // url_fseek(&s->pb, pos, SEEK_SET);
923 // key_pos = pos;
924 // for(i=0;i<16;i++){
925 // pos = url_ftell(&s->pb);
926 // if (av_read_frame(s, &pkt) < 0){
927 // av_log(s, AV_LOG_INFO, "seek failed\n");
928 // return -1;
929 // }
930 // asf_st = s->streams[stream_index]->priv_data;
931 // pos += st->parser->frame_offset;
932 //
933 // if (pkt.size > b) {
934 // b = pkt.size;
935 // key_pos = pos;
936 // }
937 //
938 // av_free_packet(&pkt);
939 // }
940
941 /* do the seek */
ccd3228e 942 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
56c96a22
MN
943 url_fseek(&s->pb, pos, SEEK_SET);
944 }
38376f00
KK
945 asf_reset_header(s);
946 return 0;
2a10020b
ZK
947}
948
ff70e601 949AVInputFormat asf_demuxer = {
c9a65ca8
FB
950 "asf",
951 "asf format",
952 sizeof(ASFContext),
953 asf_probe,
954 asf_read_header,
955 asf_read_packet,
956 asf_read_close,
2a10020b 957 asf_read_seek,
8d14a25c 958 asf_read_pts,
c9a65ca8 959};