Favor chunk size over hitting the correct position after reading the chunk size in...
[libav.git] / libavformat / asfdec.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * ASF compatible demuxer
406792e7 3 * Copyright (c) 2000, 2001 Fabrice Bellard
de6d9b64 4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
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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
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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 */
245976da 21
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22//#define DEBUG
23
245976da 24#include "libavutil/common.h"
5f1ac36d 25#include "libavutil/avstring.h"
245976da 26#include "libavcodec/mpegaudio.h"
de6d9b64 27#include "avformat.h"
9d9f4119 28#include "riff.h"
542993b0 29#include "asf.h"
72be7db4 30#include "asfcrypt.h"
5f1ac36d 31#include "avlanguage.h"
de6d9b64 32
9686df2b 33void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
49ce700a 34
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35#undef NDEBUG
36#include <assert.h>
37
615b92fd 38#define FRAME_HEADER_SIZE 17
115329f1 39// Fix Me! FRAME_HEADER_SIZE may be different.
615b92fd 40
b8b00d94 41static const ff_asf_guid index_guid = {
24c14d6d 42 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
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43};
44
b8b00d94 45static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
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46 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
47};
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48/**********************************/
49/* decoding */
50
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51static int guidcmp(const void *g1, const void *g2)
52{
53 return memcmp(g1, g2, sizeof(ff_asf_guid));
54}
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55
56#ifdef DEBUG
5082f759 57#define PRINT_IF_GUID(g,cmp) \
4d0c3dc0 58if (!guidcmp(g, &cmp)) \
f94981ea 59 dprintf(NULL, "(GUID: %s) ", #cmp)
5082f759 60
b8b00d94 61static void print_guid(const ff_asf_guid *g)
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62{
63 int i;
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64 PRINT_IF_GUID(g, ff_asf_header);
65 else PRINT_IF_GUID(g, ff_asf_file_header);
66 else PRINT_IF_GUID(g, ff_asf_stream_header);
67 else PRINT_IF_GUID(g, ff_asf_audio_stream);
68 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
69 else PRINT_IF_GUID(g, ff_asf_video_stream);
70 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
71 else PRINT_IF_GUID(g, ff_asf_command_stream);
72 else PRINT_IF_GUID(g, ff_asf_comment_header);
73 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
74 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
75 else PRINT_IF_GUID(g, ff_asf_data_header);
5082f759 76 else PRINT_IF_GUID(g, index_guid);
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77 else PRINT_IF_GUID(g, ff_asf_head1_guid);
78 else PRINT_IF_GUID(g, ff_asf_head2_guid);
79 else PRINT_IF_GUID(g, ff_asf_my_guid);
80 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
81 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
82 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
83 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
84 else PRINT_IF_GUID(g, ff_asf_metadata_header);
88b51ea9 85 else PRINT_IF_GUID(g, ff_asf_marker_header);
0e3b6a6f 86 else PRINT_IF_GUID(g, stream_bitrate_guid);
5f1ac36d 87 else PRINT_IF_GUID(g, ff_asf_language_guid);
5082f759 88 else
f94981ea 89 dprintf(NULL, "(GUID: unknown) ");
24c14d6d 90 for(i=0;i<16;i++)
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91 dprintf(NULL, " 0x%02x,", (*g)[i]);
92 dprintf(NULL, "}\n");
de6d9b64 93}
6df84c3a 94#undef PRINT_IF_GUID
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95#else
96#define print_guid(g)
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97#endif
98
b8b00d94 99static void get_guid(ByteIOContext *s, ff_asf_guid *g)
de6d9b64 100{
24c14d6d 101 assert(sizeof(*g) == 16);
3dc761a4 102 get_buffer(s, *g, sizeof(*g));
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103}
104
105#if 0
106static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
107{
108 int len, c;
109 char *q;
110
111 len = get_le16(pb);
112 q = buf;
113 while (len > 0) {
114 c = get_le16(pb);
115 if ((q - buf) < buf_size - 1)
116 *q++ = c;
117 len--;
118 }
119 *q = '\0';
120}
121#endif
122
123static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
124{
db5c43b4 125 char* q = buf;
fce44489 126 while (len > 1) {
db5c43b4 127 uint8_t tmp;
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128 uint32_t ch;
129
130 GET_UTF16(ch, (len -= 2) >= 0 ? get_le16(pb) : 0, break;)
131 PUT_UTF8(ch, tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
de6d9b64 132 }
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BC
133 if (len > 0)
134 url_fskip(pb, len);
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135 *q = '\0';
136}
137
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138static int asf_probe(AVProbeData *pd)
139{
c9a65ca8 140 /* check file header */
4d0c3dc0 141 if (!guidcmp(pd->buf, &ff_asf_header))
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142 return AVPROBE_SCORE_MAX;
143 else
144 return 0;
145}
146
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147static int get_value(ByteIOContext *pb, int type){
148 switch(type){
149 case 2: return get_le32(pb);
150 case 3: return get_le32(pb);
151 case 4: return get_le64(pb);
152 case 5: return get_le16(pb);
153 default:return INT_MIN;
154 }
155}
156
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157static void get_tag(AVFormatContext *s, const char *key, int type, int len)
158{
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159 char *value;
160
fce44489 161 if ((unsigned)len >= (UINT_MAX - 1)/2)
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162 return;
163
fce44489 164 value = av_malloc(2*len+1);
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165 if (!value)
166 return;
167
6538c0f1 168 if (type == 0) { // UTF16-LE
fce44489 169 get_str16_nolen(s->pb, len, value, 2*len + 1);
6538c0f1 170 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
20e2a7ae 171 uint64_t num = get_value(s->pb, type);
12ad6671 172 snprintf(value, len, "%"PRIu64, num);
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AJ
173 } else {
174 url_fskip(s->pb, len);
47794b9d 175 av_freep(&value);
27e74927 176 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
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177 return;
178 }
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179 av_metadata_set2(&s->metadata, key, value, 0);
180 av_freep(&value);
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181}
182
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183static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
184{
c9a65ca8 185 ASFContext *asf = s->priv_data;
b8b00d94 186 ff_asf_guid g;
899681cd 187 ByteIOContext *pb = s->pb;
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188 AVStream *st;
189 ASFStream *asf_st;
e095026a 190 int size, i;
0c1a9eda 191 int64_t gsize;
30e88789 192 AVRational dar[128];
d8470737 193 uint32_t bitrate[128];
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194
195 memset(dar, 0, sizeof(dar));
d8470737 196 memset(bitrate, 0, sizeof(bitrate));
de6d9b64 197
de6d9b64 198 get_guid(pb, &g);
4d0c3dc0 199 if (guidcmp(&g, &ff_asf_header))
ccafd472 200 return -1;
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201 get_le64(pb);
202 get_le32(pb);
203 get_byte(pb);
204 get_byte(pb);
2141dc37 205 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64 206 for(;;) {
cb0061d4 207 uint64_t gpos= url_ftell(pb);
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208 get_guid(pb, &g);
209 gsize = get_le64(pb);
cb0061d4 210 dprintf(s, "%08"PRIx64": ", gpos);
de6d9b64 211 print_guid(&g);
f94981ea 212 dprintf(s, " size=0x%"PRIx64"\n", gsize);
4d0c3dc0 213 if (!guidcmp(&g, &ff_asf_data_header)) {
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214 asf->data_object_offset = url_ftell(pb);
215 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
216 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
217 asf->data_object_size = gsize - 24;
218 } else {
219 asf->data_object_size = (uint64_t)-1;
220 }
221 break;
222 }
de6d9b64 223 if (gsize < 24)
ccafd472 224 return -1;
4d0c3dc0 225 if (!guidcmp(&g, &ff_asf_file_header)) {
2a10020b 226 get_guid(pb, &asf->hdr.guid);
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DB
227 asf->hdr.file_size = get_le64(pb);
228 asf->hdr.create_time = get_le64(pb);
6bb2a2df 229 asf->nb_packets = get_le64(pb);
bb270c08 230 asf->hdr.play_time = get_le64(pb);
b4bbcd63 231 asf->hdr.send_time = get_le64(pb);
bb270c08
DB
232 asf->hdr.preroll = get_le32(pb);
233 asf->hdr.ignore = get_le32(pb);
234 asf->hdr.flags = get_le32(pb);
235 asf->hdr.min_pktsize = get_le32(pb);
236 asf->hdr.max_pktsize = get_le32(pb);
237 asf->hdr.max_bitrate = get_le32(pb);
91d19d47 238 s->packet_size = asf->hdr.max_pktsize;
4d0c3dc0 239 } else if (!guidcmp(&g, &ff_asf_stream_header)) {
72415b2a 240 enum AVMediaType type;
fb65d2ca 241 int type_specific_size, sizeX;
7ad5455c 242 uint64_t total_size;
de6d9b64 243 unsigned int tag1;
371bf806 244 int64_t pos1, pos2, start_time;
6fea687e 245 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
2a10020b 246
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247 pos1 = url_ftell(pb);
248
247eadca 249 st = av_new_stream(s, 0);
de6d9b64 250 if (!st)
ccafd472 251 return AVERROR(ENOMEM);
9ee91c2f 252 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
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253 asf_st = av_mallocz(sizeof(ASFStream));
254 if (!asf_st)
ccafd472 255 return AVERROR(ENOMEM);
de6d9b64 256 st->priv_data = asf_st;
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257 start_time = asf->hdr.preroll;
258
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259 asf_st->stream_language_index = 128; // invalid stream index means no language info
260
73fe1052 261 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
f2086fb5 262 st->duration = asf->hdr.play_time /
371bf806 263 (10000000 / 1000) - start_time;
73fe1052 264 }
de6d9b64 265 get_guid(pb, &g);
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266
267 test_for_ext_stream_audio = 0;
4d0c3dc0 268 if (!guidcmp(&g, &ff_asf_audio_stream)) {
72415b2a 269 type = AVMEDIA_TYPE_AUDIO;
4d0c3dc0 270 } else if (!guidcmp(&g, &ff_asf_video_stream)) {
72415b2a 271 type = AVMEDIA_TYPE_VIDEO;
4d0c3dc0 272 } else if (!guidcmp(&g, &ff_asf_command_stream)) {
72415b2a 273 type = AVMEDIA_TYPE_DATA;
4d0c3dc0 274 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
88141c91 275 test_for_ext_stream_audio = 1;
72415b2a 276 type = AVMEDIA_TYPE_UNKNOWN;
de6d9b64 277 } else {
ccafd472 278 return -1;
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FB
279 }
280 get_guid(pb, &g);
281 total_size = get_le64(pb);
2e7973bb 282 type_specific_size = get_le32(pb);
de6d9b64 283 get_le32(pb);
bb270c08 284 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 285 // mapping of asf ID to AV stream ID;
247eadca 286 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 287
de6d9b64 288 get_le32(pb);
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289
290 if (test_for_ext_stream_audio) {
291 get_guid(pb, &g);
4d0c3dc0 292 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
72415b2a 293 type = AVMEDIA_TYPE_AUDIO;
6fea687e 294 is_dvr_ms_audio=1;
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MN
295 get_guid(pb, &g);
296 get_le32(pb);
297 get_le32(pb);
298 get_le32(pb);
299 get_guid(pb, &g);
300 get_le32(pb);
301 }
302 }
303
bb270c08 304 st->codec->codec_type = type;
72415b2a 305 if (type == AVMEDIA_TYPE_AUDIO) {
1a40491e 306 ff_get_wav_header(pb, st->codec, type_specific_size);
6fea687e
JD
307 if (is_dvr_ms_audio) {
308 // codec_id and codec_tag are unreliable in dvr_ms
309 // files. Set them later by probing stream.
0bef08e5 310 st->codec->codec_id = CODEC_ID_PROBE;
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JD
311 st->codec->codec_tag = 0;
312 }
e7f73adb
AC
313 if (st->codec->codec_id == CODEC_ID_AAC) {
314 st->need_parsing = AVSTREAM_PARSE_NONE;
315 } else {
e9259f8d 316 st->need_parsing = AVSTREAM_PARSE_FULL;
e7f73adb 317 }
bb270c08
DB
318 /* We have to init the frame size at some point .... */
319 pos2 = url_ftell(pb);
b9c6d01b 320 if (gsize >= (pos2 + 8 - pos1 + 24)) {
bb270c08
DB
321 asf_st->ds_span = get_byte(pb);
322 asf_st->ds_packet_size = get_le16(pb);
323 asf_st->ds_chunk_size = get_le16(pb);
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MN
324 get_le16(pb); //ds_data_size
325 get_byte(pb); //ds_silence_data
bb270c08
DB
326 }
327 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
328 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
329 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
330 if (asf_st->ds_span > 1) {
331 if (!asf_st->ds_chunk_size
05219463
MN
332 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
333 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
334 asf_st->ds_span = 0; // disable descrambling
335 }
01f4895c 336 switch (st->codec->codec_id) {
80783dc2 337 case CODEC_ID_MP3:
01f4895c 338 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
339 break;
340 case CODEC_ID_PCM_S16LE:
341 case CODEC_ID_PCM_S16BE:
342 case CODEC_ID_PCM_U16LE:
343 case CODEC_ID_PCM_U16BE:
344 case CODEC_ID_PCM_S8:
345 case CODEC_ID_PCM_U8:
346 case CODEC_ID_PCM_ALAW:
347 case CODEC_ID_PCM_MULAW:
01f4895c 348 st->codec->frame_size = 1;
f80c1ac0
PG
349 break;
350 default:
351 /* This is probably wrong, but it prevents a crash later */
01f4895c 352 st->codec->frame_size = 1;
f80c1ac0
PG
353 break;
354 }
72415b2a 355 } else if (type == AVMEDIA_TYPE_VIDEO) {
bb270c08 356 get_le32(pb);
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357 get_le32(pb);
358 get_byte(pb);
359 size = get_le16(pb); /* size */
0ffd77b9 360 sizeX= get_le32(pb); /* size */
01f4895c 361 st->codec->width = get_le32(pb);
bb270c08 362 st->codec->height = get_le32(pb);
2a10020b 363 /* not available for asf */
de6d9b64 364 get_le16(pb); /* panes */
dd1c8f3e 365 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
de6d9b64 366 tag1 = get_le32(pb);
bb270c08 367 url_fskip(pb, 20);
871e62e5 368// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
0ffd77b9 369 size= sizeX;
bb270c08
DB
370 if (size > 40) {
371 st->codec->extradata_size = size - 40;
372 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
373 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
374 }
5e29abf8 375
6d050dd6 376 /* Extract palette from extradata if bpp <= 8 */
377 /* This code assumes that extradata contains only palette */
378 /* This is true for all paletted codecs implemented in ffmpeg */
379 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
380 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
63613fe6 381#if HAVE_BIGENDIAN
6d050dd6 382 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
383 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 384#else
6d050dd6 385 memcpy(st->codec->palctrl->palette, st->codec->extradata,
386 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 387#endif
6d050dd6 388 st->codec->palctrl->palette_changed = 1;
389 }
5e29abf8 390
01f4895c 391 st->codec->codec_tag = tag1;
1a40491e 392 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
afbb5ce4 393 if(tag1 == MKTAG('D', 'V', 'R', ' '))
57004ff1 394 st->need_parsing = AVSTREAM_PARSE_FULL;
de6d9b64
FB
395 }
396 pos2 = url_ftell(pb);
397 url_fskip(pb, gsize - (pos2 - pos1 + 24));
4d0c3dc0 398 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
de6d9b64
FB
399 int len1, len2, len3, len4, len5;
400
401 len1 = get_le16(pb);
402 len2 = get_le16(pb);
403 len3 = get_le16(pb);
404 len4 = get_le16(pb);
405 len5 = get_le16(pb);
20e2a7ae
AJ
406 get_tag(s, "title" , 0, len1);
407 get_tag(s, "author" , 0, len2);
408 get_tag(s, "copyright", 0, len3);
409 get_tag(s, "comment" , 0, len4);
bb270c08 410 url_fskip(pb, len5);
4d0c3dc0 411 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
0e3b6a6f
RM
412 int stream_count = get_le16(pb);
413 int j;
414
871e62e5
BF
415// av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
416// av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
0e3b6a6f
RM
417 for(j = 0; j < stream_count; j++) {
418 int flags, bitrate, stream_id;
419
420 flags= get_le16(pb);
421 bitrate= get_le32(pb);
422 stream_id= (flags & 0x7f);
871e62e5 423// av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
a9054d91 424 asf->stream_bitrates[stream_id]= bitrate;
0e3b6a6f 425 }
5f1ac36d
CC
426 } else if (!guidcmp(&g, &ff_asf_language_guid)) {
427 int j;
428 int stream_count = get_le16(pb);
429 for(j = 0; j < stream_count; j++) {
430 char lang[6];
431 unsigned int lang_len = get_byte(pb);
432 get_str16_nolen(pb, lang_len, lang, sizeof(lang));
433 if (j < 128)
434 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
435 }
4d0c3dc0 436 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
6d050dd6 437 int desc_count, i;
438
439 desc_count = get_le16(pb);
440 for(i=0;i<desc_count;i++) {
441 int name_len,value_type,value_len;
442 char name[1024];
443
444 name_len = get_le16(pb);
4a3104a9
AK
445 if (name_len%2) // must be even, broken lavf versions wrote len-1
446 name_len += 1;
6d050dd6 447 get_str16_nolen(pb, name_len, name, sizeof(name));
448 value_type = get_le16(pb);
449 value_len = get_le16(pb);
514b73cf 450 if (!value_type && value_len%2)
4a3104a9 451 value_len += 1;
6d050dd6 452 get_tag(s, name, value_type, value_len);
453 }
4d0c3dc0 454 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
30e88789
MN
455 int n, stream_num, name_len, value_len, value_type, value_num;
456 n = get_le16(pb);
457
458 for(i=0;i<n;i++) {
459 char name[1024];
460
461 get_le16(pb); //lang_list_index
462 stream_num= get_le16(pb);
463 name_len= get_le16(pb);
464 value_type= get_le16(pb);
465 value_len= get_le32(pb);
466
467 get_str16_nolen(pb, name_len, name, sizeof(name));
871e62e5 468//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
755bfeab 469 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
30e88789
MN
470 url_fskip(pb, value_len - 2);
471
472 if(stream_num<128){
473 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
474 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
475 }
476 }
4d0c3dc0 477 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
88141c91 478 int ext_len, payload_ext_ct, stream_ct;
d8470737 479 uint32_t ext_d, leak_rate, stream_num;
5f1ac36d 480 unsigned int stream_languageid_index;
88141c91 481
de3ae959
MN
482 get_le64(pb); // starttime
483 get_le64(pb); // endtime
d8470737 484 leak_rate = get_le32(pb); // leak-datarate
de3ae959
MN
485 get_le32(pb); // bucket-datasize
486 get_le32(pb); // init-bucket-fullness
487 get_le32(pb); // alt-leak-datarate
488 get_le32(pb); // alt-bucket-datasize
489 get_le32(pb); // alt-init-bucket-fullness
490 get_le32(pb); // max-object-size
491 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
d8470737 492 stream_num = get_le16(pb); // stream-num
5f1ac36d
CC
493
494 stream_languageid_index = get_le16(pb); // stream-language-id-index
495 if (stream_num < 128)
496 asf->streams[stream_num].stream_language_index = stream_languageid_index;
497
de3ae959
MN
498 get_le64(pb); // avg frametime in 100ns units
499 stream_ct = get_le16(pb); //stream-name-count
500 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91 501
d8470737
ZM
502 if (stream_num < 128)
503 bitrate[stream_num] = leak_rate;
504
88141c91
MN
505 for (i=0; i<stream_ct; i++){
506 get_le16(pb);
507 ext_len = get_le16(pb);
508 url_fseek(pb, ext_len, SEEK_CUR);
509 }
510
511 for (i=0; i<payload_ext_ct; i++){
512 get_guid(pb, &g);
513 ext_d=get_le16(pb);
514 ext_len=get_le32(pb);
515 url_fseek(pb, ext_len, SEEK_CUR);
516 }
517
518 // there could be a optional stream properties object to follow
519 // if so the next iteration will pick it up
4d0c3dc0 520 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
de6d9b64
FB
521 int v1, v2;
522 get_guid(pb, &g);
523 v1 = get_le32(pb);
524 v2 = get_le16(pb);
88b51ea9
VP
525 } else if (!guidcmp(&g, &ff_asf_marker_header)) {
526 int i, count, name_len;
527 char name[1024];
528
529 get_le64(pb); // reserved 16 bytes
530 get_le64(pb); // ...
531 count = get_le32(pb); // markers count
532 get_le16(pb); // reserved 2 bytes
533 name_len = get_le16(pb); // name length
534 for(i=0;i<name_len;i++){
535 get_byte(pb); // skip the name
536 }
537
538 for(i=0;i<count;i++){
539 int64_t pres_time;
540 int name_len;
541
542 get_le64(pb); // offset, 8 bytes
543 pres_time = get_le64(pb); // presentation time
544 get_le16(pb); // entry length
545 get_le32(pb); // send time
546 get_le32(pb); // flags
547 name_len = get_le32(pb); // name length
548 get_str16_nolen(pb, name_len * 2, name, sizeof(name));
549 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
550 }
88141c91 551#if 0
4d0c3dc0 552 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
de6d9b64
FB
553 int len, v1, n, num;
554 char str[256], *q;
555 char tag[16];
556
557 get_guid(pb, &g);
558 print_guid(&g);
2a10020b 559
de6d9b64
FB
560 n = get_le32(pb);
561 for(i=0;i<n;i++) {
562 num = get_le16(pb); /* stream number */
563 get_str16(pb, str, sizeof(str));
564 get_str16(pb, str, sizeof(str));
565 len = get_le16(pb);
566 q = tag;
567 while (len > 0) {
568 v1 = get_byte(pb);
569 if ((q - tag) < sizeof(tag) - 1)
570 *q++ = v1;
571 len--;
572 }
573 *q = '\0';
574 }
575#endif
576 } else if (url_feof(pb)) {
ccafd472 577 return -1;
de6d9b64 578 } else {
febd1c90
DT
579 if (!s->keylen) {
580 if (!guidcmp(&g, &ff_asf_content_encryption)) {
581 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
582 } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
583 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
584 } else if (!guidcmp(&g, &ff_asf_digital_signature)) {
585 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
586 }
587 }
de6d9b64 588 }
cb0061d4
MN
589 if(url_ftell(pb) != gpos + gsize)
590 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
591 url_fseek(pb, gpos + gsize, SEEK_SET);
de6d9b64
FB
592 }
593 get_guid(pb, &g);
594 get_le64(pb);
595 get_byte(pb);
596 get_byte(pb);
2141dc37 597 if (url_feof(pb))
ccafd472 598 return -1;
2141dc37 599 asf->data_offset = url_ftell(pb);
de6d9b64
FB
600 asf->packet_size_left = 0;
601
30e88789
MN
602
603 for(i=0; i<128; i++){
604 int stream_num= asf->asfid2avid[i];
d8470737 605 if(stream_num>=0){
59729451
AJ
606 AVStream *st = s->streams[stream_num];
607 if (!st->codec->bit_rate)
608 st->codec->bit_rate = bitrate[i];
d8470737 609 if (dar[i].num > 0 && dar[i].den > 0)
59729451
AJ
610 av_reduce(&st->sample_aspect_ratio.num,
611 &st->sample_aspect_ratio.den,
18d915dd 612 dar[i].num, dar[i].den, INT_MAX);
871e62e5 613//av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
5f1ac36d
CC
614
615 // copy and convert language codes to the frontend
616 if (asf->streams[i].stream_language_index < 128) {
617 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
618 if (rfc1766 && strlen(rfc1766) > 1) {
619 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
620 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
621 if (iso6392)
2ef6c124 622 av_metadata_set2(&st->metadata, "language", iso6392, 0);
5f1ac36d
CC
623 }
624 }
30e88789
MN
625 }
626 }
627
de6d9b64 628 return 0;
de6d9b64
FB
629}
630
2a10020b
ZK
631#define DO_2BITS(bits, var, defval) \
632 switch (bits & 3) \
633 { \
634 case 3: var = get_le32(pb); rsize += 4; break; \
635 case 2: var = get_le16(pb); rsize += 2; break; \
636 case 1: var = get_byte(pb); rsize++; break; \
637 default: var = defval; break; \
638 }
639
277a28e8
RB
640/**
641 * Load a single ASF packet into the demuxer.
642 * @param s demux context
643 * @param pb context to read data from
32e543f8 644 * @return 0 on success, <0 on error
277a28e8
RB
645 */
646static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
de6d9b64
FB
647{
648 ASFContext *asf = s->priv_data;
2a10020b 649 uint32_t packet_length, padsize;
0c0d17f3 650 int rsize = 8;
0fd9e6f3
MN
651 int c, d, e, off;
652
68a10b40
RD
653 // if we do not know packet size, allow skipping up to 32 kB
654 off= 32768;
655 if (s->packet_size > 0)
b098b309 656 off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
0fd9e6f3
MN
657
658 c=d=e=-1;
659 while(off-- > 0){
660 c=d; d=e;
661 e= get_byte(pb);
662 if(c == 0x82 && !d && !e)
663 break;
664 }
115329f1 665
1359c2d4 666 if (c != 0x82) {
2078ca16
RB
667 /**
668 * This code allows handling of -EAGAIN at packet boundaries (i.e.
669 * if the packet sync code above triggers -EAGAIN). This does not
670 * imply complete -EAGAIN handling support at random positions in
671 * the stream.
672 */
673 if (url_ferror(pb) == AVERROR(EAGAIN))
674 return AVERROR(EAGAIN);
5acdd6e6 675 if (!url_feof(pb))
bb270c08 676 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b 677 }
0c0d17f3 678 if ((c & 0x8f) == 0x82) {
0fd9e6f3 679 if (d || e) {
5acdd6e6 680 if (!url_feof(pb))
bb270c08 681 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 682 return -1;
bb270c08 683 }
0c0d17f3 684 c= get_byte(pb);
0fd9e6f3 685 d= get_byte(pb);
0c0d17f3
MN
686 rsize+=3;
687 }else{
688 url_fseek(pb, -1, SEEK_CUR); //FIXME
de6d9b64 689 }
2a10020b 690
0c0d17f3
MN
691 asf->packet_flags = c;
692 asf->packet_property = d;
2a10020b 693
91d19d47 694 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
2a10020b
ZK
695 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
696 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
697
5b11e081 698 //the following checks prevent overflows and infinite loops
96f0731a 699 if(!packet_length || packet_length >= (1U<<29)){
5b11e081 700 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 701 return -1;
5b11e081 702 }
92216453 703 if(padsize >= packet_length){
5b11e081 704 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 705 return -1;
5b11e081
MN
706 }
707
2a10020b 708 asf->packet_timestamp = get_le32(pb);
de6d9b64 709 get_le16(pb); /* duration */
2141dc37 710 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
711
712 if (asf->packet_flags & 0x01) {
bb270c08 713 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
714 asf->packet_segments = asf->packet_segsizetype & 0x3f;
715 } else {
bb270c08 716 asf->packet_segments = 1;
2a10020b
ZK
717 asf->packet_segsizetype = 0x80;
718 }
719 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
720 if (packet_length < asf->hdr.min_pktsize)
721 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 722 asf->packet_padsize = padsize;
91d19d47 723 dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64
FB
724 return 0;
725}
726
ae60a857
MN
727/**
728 *
729 * @return <0 if error
730 */
d7fb5a18 731static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
ae60a857 732 ASFContext *asf = s->priv_data;
ae60a857
MN
733 int rsize = 1;
734 int num = get_byte(pb);
559a55ad 735 int64_t ts0, ts1;
ae60a857
MN
736
737 asf->packet_segments--;
738 asf->packet_key_frame = num >> 7;
739 asf->stream_index = asf->asfid2avid[num & 0x7f];
740 // sequence should be ignored!
741 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
742 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
743 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
744//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);
745 if (asf->packet_replic_size >= 8) {
746 asf->packet_obj_size = get_le32(pb);
747 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
748 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
749 return -1;
750 }
751 asf->packet_frag_timestamp = get_le32(pb); // timestamp
559a55ad
MN
752 if(asf->packet_replic_size >= 8+38+4){
753// for(i=0; i<asf->packet_replic_size-8; i++)
754// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
755// av_log(s, AV_LOG_DEBUG, "\n");
756 url_fskip(pb, 10);
757 ts0= get_le64(pb);
758 ts1= get_le64(pb);
759 url_fskip(pb, 12);
760 get_le32(pb);
761 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
762 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
763 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
764 }else
765 url_fskip(pb, asf->packet_replic_size - 8);
ae60a857
MN
766 rsize += asf->packet_replic_size; // FIXME - check validity
767 } else if (asf->packet_replic_size==1){
efc90ebf 768 // multipacket - frag_offset is beginning timestamp
ae60a857
MN
769 asf->packet_time_start = asf->packet_frag_offset;
770 asf->packet_frag_offset = 0;
771 asf->packet_frag_timestamp = asf->packet_timestamp;
772
773 asf->packet_time_delta = get_byte(pb);
774 rsize++;
775 }else if(asf->packet_replic_size!=0){
776 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
777 return -1;
778 }
779 if (asf->packet_flags & 0x01) {
780 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
781 if(asf->packet_frag_size > asf->packet_size_left - rsize){
782 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
783 return -1;
784 }
ae60a857
MN
785 //printf("Fragsize %d\n", asf->packet_frag_size);
786 } else {
787 asf->packet_frag_size = asf->packet_size_left - rsize;
788 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
789 }
790 if (asf->packet_replic_size == 1) {
791 asf->packet_multi_size = asf->packet_frag_size;
792 if (asf->packet_multi_size > asf->packet_size_left)
793 return -1;
794 }
795 asf->packet_size_left -= rsize;
796 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
797
798 return 0;
799}
800
277a28e8
RB
801/**
802 * Parse data from individual ASF packets (which were previously loaded
803 * with asf_get_packet()).
804 * @param s demux context
805 * @param pb context to read data from
806 * @param pkt pointer to store packet data into
32e543f8 807 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
277a28e8
RB
808 * packets need to be loaded (through asf_get_packet())
809 */
810static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
de6d9b64
FB
811{
812 ASFContext *asf = s->priv_data;
2a10020b 813 ASFStream *asf_st = 0;
2a10020b 814 for (;;) {
ceba96cb 815 if(url_feof(pb))
799a0722 816 return AVERROR_EOF;
bb270c08
DB
817 if (asf->packet_size_left < FRAME_HEADER_SIZE
818 || asf->packet_segments < 1) {
819 //asf->packet_size_left <= asf->packet_padsize) {
820 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 821 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 822 assert(ret>=0);
bb270c08
DB
823 /* fail safe */
824 url_fskip(pb, ret);
b04d5d31 825
022f0b7c 826 asf->packet_pos= url_ftell(pb);
b6eaae39
KED
827 if (asf->data_object_size != (uint64_t)-1 &&
828 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1d0036b0 829 return AVERROR_EOF; /* Do not exceed the size of the data object */
f27544fd 830 return 1;
bb270c08
DB
831 }
832 if (asf->packet_time_start == 0) {
b0d75d60 833 if(asf_read_frame_header(s, pb) < 0){
ae60a857 834 asf->packet_segments= 0;
236116cb 835 continue;
1305a9d5 836 }
bb270c08 837 if (asf->stream_index < 0
f3356e9c
MN
838 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
839 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
840 ) {
1359c2d4 841 asf->packet_time_start = 0;
bb270c08
DB
842 /* unhandled packet (should not happen) */
843 url_fskip(pb, asf->packet_frag_size);
844 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 845 if(asf->stream_index < 0)
ae60a857 846 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 847 continue;
bb270c08
DB
848 }
849 asf->asf_st = s->streams[asf->stream_index]->priv_data;
850 }
851 asf_st = asf->asf_st;
852
bb270c08 853 if (asf->packet_replic_size == 1) {
efc90ebf 854 // frag_offset is here used as the beginning timestamp
bb270c08
DB
855 asf->packet_frag_timestamp = asf->packet_time_start;
856 asf->packet_time_start += asf->packet_time_delta;
857 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
858 asf->packet_size_left--;
2141dc37 859 asf->packet_multi_size--;
bb270c08
DB
860 if (asf->packet_multi_size < asf->packet_obj_size)
861 {
862 asf->packet_time_start = 0;
863 url_fskip(pb, asf->packet_multi_size);
864 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 865 continue;
bb270c08
DB
866 }
867 asf->packet_multi_size -= asf->packet_obj_size;
868 //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);
869 }
60ff1c44
MN
870 if( /*asf->packet_frag_size == asf->packet_obj_size*/
871 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
872 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
873 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
874 asf_st->frag_offset, asf->packet_frag_size,
875 asf->packet_obj_size, asf_st->pkt.size);
876 asf->packet_obj_size= asf_st->pkt.size;
877 }
878
f8f0a0bd
MN
879 if ( asf_st->pkt.size != asf->packet_obj_size
880 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
881 if(asf_st->pkt.data){
882 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
883 asf_st->frag_offset = 0;
884 av_free_packet(&asf_st->pkt);
885 }
bb270c08
DB
886 /* new packet */
887 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
888 asf_st->seq = asf->packet_seq;
eb63b051 889 asf_st->pkt.dts = asf->packet_frag_timestamp;
bb270c08 890 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
891 asf_st->pkt.pos =
892 asf_st->packet_pos= asf->packet_pos;
893//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
cc947f04 894//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
72415b2a
SS
895//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
896 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
bb270c08
DB
897 asf->packet_key_frame = 1;
898 if (asf->packet_key_frame)
cc947f04 899 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
bb270c08
DB
900 }
901
902 /* read data */
903 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
91d19d47 904 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
bb270c08
DB
905 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
906 asf->packet_size_left -= asf->packet_frag_size;
907 if (asf->packet_size_left < 0)
2141dc37 908 continue;
4c71d727
MN
909
910 if( asf->packet_frag_offset >= asf_st->pkt.size
911 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
912 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
913 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
914 continue;
915 }
916
bb270c08
DB
917 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
918 asf->packet_frag_size);
72be7db4
RD
919 if (s->key && s->keylen == 20)
920 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
921 asf->packet_frag_size);
bb270c08
DB
922 asf_st->frag_offset += asf->packet_frag_size;
923 /* test if whole packet is read */
924 if (asf_st->frag_offset == asf_st->pkt.size) {
da0b94f5
MN
925 //workaround for macroshit radio DVR-MS files
926 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
927 && asf_st->pkt.size > 100){
928 int i;
929 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
930 if(i == asf_st->pkt.size){
931 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
932 asf_st->frag_offset = 0;
933 av_free_packet(&asf_st->pkt);
934 continue;
935 }
936 }
937
bb270c08
DB
938 /* return packet */
939 if (asf_st->ds_span > 1) {
05219463 940 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
b43387d4 941 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
05219463 942 }else{
bb270c08 943 /* packet descrambling */
191e8ca7 944 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
945 if (newdata) {
946 int offset = 0;
947 while (offset < asf_st->pkt.size) {
948 int off = offset / asf_st->ds_chunk_size;
949 int row = off / asf_st->ds_span;
950 int col = off % asf_st->ds_span;
951 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
952 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
953
954 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
955 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
956 memcpy(newdata + offset,
957 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
958 asf_st->ds_chunk_size);
959 offset += asf_st->ds_chunk_size;
960 }
961 av_free(asf_st->pkt.data);
962 asf_st->pkt.data = newdata;
963 }
05219463 964 }
bb270c08
DB
965 }
966 asf_st->frag_offset = 0;
b83e83b9 967 *pkt= asf_st->pkt;
bb270c08
DB
968 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
969 asf_st->pkt.size = 0;
970 asf_st->pkt.data = 0;
971 break; // packet completed
972 }
de6d9b64 973 }
de6d9b64
FB
974 return 0;
975}
976
f27544fd
RB
977static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
978{
979 ASFContext *asf = s->priv_data;
980
981 for (;;) {
982 int ret;
983
984 /* parse cached packets, if any */
1d217cdb 985 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
f27544fd 986 return ret;
1d217cdb 987 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
f27544fd
RB
988 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
989 asf->packet_time_start = 0;
990 }
991
992 return 0;
993}
994
38376f00
KK
995// Added to support seeking after packets have been read
996// If information is not reset, read_packet fails due to
997// leftover information from previous reads
998static void asf_reset_header(AVFormatContext *s)
999{
1000 ASFContext *asf = s->priv_data;
82b9e4a2
MN
1001 ASFStream *asf_st;
1002 int i;
38376f00
KK
1003
1004 asf->packet_nb_frames = 0;
38376f00
KK
1005 asf->packet_size_left = 0;
1006 asf->packet_segments = 0;
1007 asf->packet_flags = 0;
1008 asf->packet_property = 0;
1009 asf->packet_timestamp = 0;
1010 asf->packet_segsizetype = 0;
1011 asf->packet_segments = 0;
1012 asf->packet_seq = 0;
1013 asf->packet_replic_size = 0;
1014 asf->packet_key_frame = 0;
1015 asf->packet_padsize = 0;
1016 asf->packet_frag_offset = 0;
1017 asf->packet_frag_size = 0;
1018 asf->packet_frag_timestamp = 0;
1019 asf->packet_multi_size = 0;
1020 asf->packet_obj_size = 0;
1021 asf->packet_time_delta = 0;
1022 asf->packet_time_start = 0;
115329f1 1023
82b9e4a2
MN
1024 for(i=0; i<s->nb_streams; i++){
1025 asf_st= s->streams[i]->priv_data;
1026 av_free_packet(&asf_st->pkt);
1027 asf_st->frag_offset=0;
1028 asf_st->seq=0;
1029 }
1030 asf->asf_st= NULL;
38376f00
KK
1031}
1032
5d25d2a9
DB
1033static int asf_read_close(AVFormatContext *s)
1034{
1035 int i;
1036
1037 asf_reset_header(s);
1038 for(i=0;i<s->nb_streams;i++) {
1039 AVStream *st = s->streams[i];
5d25d2a9
DB
1040 av_free(st->codec->palctrl);
1041 }
1042 return 0;
1043}
1044
8d14a25c 1045static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00 1046{
38376f00 1047 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 1048 ASFStream *asf_st;
580fb5e7 1049 int64_t pts;
82b9e4a2 1050 int64_t pos= *ppos;
3e9245a9
MN
1051 int i;
1052 int64_t start_pos[s->nb_streams];
115329f1 1053
3e9245a9
MN
1054 for(i=0; i<s->nb_streams; i++){
1055 start_pos[i]= pos;
1056 }
115329f1 1057
68a10b40 1058 if (s->packet_size > 0)
b098b309 1059 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
8d14a25c 1060 *ppos= pos;
899681cd 1061 url_fseek(s->pb, pos, SEEK_SET);
115329f1 1062
82b9e4a2 1063//printf("asf_read_pts\n");
82b9e4a2 1064 asf_reset_header(s);
3e9245a9 1065 for(;;){
82b9e4a2 1066 if (av_read_frame(s, pkt) < 0){
0b93103a 1067 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 1068 return AV_NOPTS_VALUE;
82b9e4a2 1069 }
115329f1 1070
38cf2a72 1071 pts= pkt->pts;
580fb5e7
MN
1072
1073 av_free_packet(pkt);
cc947f04 1074 if(pkt->flags&AV_PKT_FLAG_KEY){
3e9245a9
MN
1075 i= pkt->stream_index;
1076
1077 asf_st= s->streams[i]->priv_data;
1078
91d19d47 1079// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
8d14a25c 1080 pos= asf_st->packet_pos;
09646bab 1081
52e54612 1082 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 1083 start_pos[i]= asf_st->packet_pos + 1;
115329f1 1084
3e9245a9
MN
1085 if(pkt->stream_index == stream_index)
1086 break;
1087 }
1088 }
1089
1090 *ppos= pos;
949b1a13 1091//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
580fb5e7
MN
1092
1093 return pts;
38376f00
KK
1094}
1095
56c96a22
MN
1096static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1097{
b8b00d94 1098 ff_asf_guid g;
56c96a22 1099 ASFContext *asf = s->priv_data;
d728e3cd 1100 int64_t current_pos= url_ftell(s->pb);
56c96a22 1101 int i;
56c96a22 1102
899681cd
BA
1103 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1104 get_guid(s->pb, &g);
4d0c3dc0 1105 if (!guidcmp(&g, &index_guid)) {
134271c2 1106 int64_t itime, last_pos=-1;
d728e3cd 1107 int pct, ict;
dc1ed614 1108 int64_t av_unused gsize= get_le64(s->pb);
899681cd
BA
1109 get_guid(s->pb, &g);
1110 itime=get_le64(s->pb);
1111 pct=get_le32(s->pb);
1112 ict=get_le32(s->pb);
871e62e5 1113 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
56c96a22
MN
1114
1115 for (i=0;i<ict;i++){
899681cd
BA
1116 int pktnum=get_le32(s->pb);
1117 int pktct =get_le16(s->pb);
91d19d47 1118 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
d728e3cd 1119 int64_t index_pts= av_rescale(itime, i, 10000);
56c96a22 1120
134271c2 1121 if(pos != last_pos){
d728e3cd 1122 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
91d19d47 1123 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
134271c2
MN
1124 last_pos=pos;
1125 }
56c96a22 1126 }
52e54612 1127 asf->index_read= 1;
56c96a22 1128 }
899681cd 1129 url_fseek(s->pb, current_pos, SEEK_SET);
56c96a22
MN
1130}
1131
3ba1438d 1132static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 1133{
afda223c 1134 ASFContext *asf = s->priv_data;
56c96a22
MN
1135 AVStream *st = s->streams[stream_index];
1136 int64_t pos;
1137 int index;
115329f1 1138
91d19d47 1139 if (s->packet_size <= 0)
38376f00
KK
1140 return -1;
1141
fa13095a 1142 /* Try using the protocol's read_seek if available */
fd2982a0 1143 if(s->pb) {
fa13095a
BA
1144 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1145 if(ret >= 0)
1146 asf_reset_header(s);
fd2982a0 1147 if (ret != AVERROR(ENOSYS))
cd31f8dc 1148 return ret;
fa13095a
BA
1149 }
1150
52e54612 1151 if (!asf->index_read)
56c96a22
MN
1152 asf_build_simple_index(s, stream_index);
1153
52e54612 1154 if(!(asf->index_read && st->index_entries)){
56c96a22
MN
1155 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1156 return -1;
1157 }else{
1158 index= av_index_search_timestamp(st, pts, flags);
1159 if(index<0)
1160 return -1;
1161
1162 /* find the position */
1163 pos = st->index_entries[index].pos;
56c96a22
MN
1164
1165 // various attempts to find key frame have failed so far
1166 // asf_reset_header(s);
899681cd 1167 // url_fseek(s->pb, pos, SEEK_SET);
56c96a22
MN
1168 // key_pos = pos;
1169 // for(i=0;i<16;i++){
899681cd 1170 // pos = url_ftell(s->pb);
56c96a22
MN
1171 // if (av_read_frame(s, &pkt) < 0){
1172 // av_log(s, AV_LOG_INFO, "seek failed\n");
1173 // return -1;
1174 // }
1175 // asf_st = s->streams[stream_index]->priv_data;
1176 // pos += st->parser->frame_offset;
1177 //
1178 // if (pkt.size > b) {
1179 // b = pkt.size;
1180 // key_pos = pos;
1181 // }
1182 //
1183 // av_free_packet(&pkt);
1184 // }
1185
1186 /* do the seek */
871e62e5 1187 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
899681cd 1188 url_fseek(s->pb, pos, SEEK_SET);
56c96a22 1189 }
38376f00
KK
1190 asf_reset_header(s);
1191 return 0;
2a10020b
ZK
1192}
1193
ff70e601 1194AVInputFormat asf_demuxer = {
c9a65ca8 1195 "asf",
bde15e74 1196 NULL_IF_CONFIG_SMALL("ASF format"),
c9a65ca8
FB
1197 sizeof(ASFContext),
1198 asf_probe,
1199 asf_read_header,
1200 asf_read_packet,
1201 asf_read_close,
2a10020b 1202 asf_read_seek,
8d14a25c 1203 asf_read_pts,
719e721a 1204 .metadata_conv = ff_asf_metadata_conv,
c9a65ca8 1205};