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ffmpeg / libavformat / asf.c @ 1d7d9935

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1 de6d9b64 Fabrice Bellard
/*
2 7fbde343 Aurelien Jacobs
 * ASF compatible demuxer
3 19720f15 Fabrice Bellard
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 19720f15 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 de6d9b64 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 de6d9b64 Fabrice Bellard
 */
21
#include "avformat.h"
22 9d9f4119 Måns Rullgård
#include "riff.h"
23 f80c1ac0 Philip Gladstone
#include "mpegaudio.h"
24 542993b0 Konstantin Andreyev
#include "asf.h"
25 db5c43b4 Zuxy Meng
#include "common.h"
26 de6d9b64 Fabrice Bellard
27 580fb5e7 Michael Niedermayer
#undef NDEBUG
28
#include <assert.h>
29
30 615b92fd Konstantin Andreyev
#define FRAME_HEADER_SIZE 17
31 115329f1 Diego Biurrun
// Fix Me! FRAME_HEADER_SIZE may be different.
32 615b92fd Konstantin Andreyev
33 de6d9b64 Fabrice Bellard
static const GUID index_guid = {
34 24c14d6d Michael Niedermayer
    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
35 de6d9b64 Fabrice Bellard
};
36
37
/**********************************/
38
/* decoding */
39
40
//#define DEBUG
41
42
#ifdef DEBUG
43 5082f759 François Revol
#define PRINT_IF_GUID(g,cmp) \
44
if (!memcmp(g, &cmp, sizeof(GUID))) \
45
    printf("(GUID: %s) ", #cmp)
46
47 de6d9b64 Fabrice Bellard
static void print_guid(const GUID *g)
48
{
49
    int i;
50 5082f759 François Revol
    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);
57 ae38261e Mike Brown
    else PRINT_IF_GUID(g, command_stream);
58 5082f759 François Revol
    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);
66 88141c91 Michael Niedermayer
    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);
70 30e88789 Michael Niedermayer
    else PRINT_IF_GUID(g, metadata_header);
71 5082f759 François Revol
    else
72
        printf("(GUID: unknown) ");
73 24c14d6d Michael Niedermayer
    for(i=0;i<16;i++)
74
        printf(" 0x%02x,", (*g)[i]);
75 de6d9b64 Fabrice Bellard
    printf("}\n");
76
}
77 6df84c3a Alex Beregszaszi
#undef PRINT_IF_GUID
78 de6d9b64 Fabrice Bellard
#endif
79
80
static void get_guid(ByteIOContext *s, GUID *g)
81
{
82 24c14d6d Michael Niedermayer
    assert(sizeof(*g) == 16);
83
    get_buffer(s, g, sizeof(*g));
84 de6d9b64 Fabrice Bellard
}
85
86
#if 0
87
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
88
{
89
    int len, c;
90
    char *q;
91

92
    len = get_le16(pb);
93
    q = buf;
94
    while (len > 0) {
95
        c = get_le16(pb);
96
        if ((q - buf) < buf_size - 1)
97
            *q++ = c;
98
        len--;
99
    }
100
    *q = '\0';
101
}
102
#endif
103
104
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
105
{
106 db5c43b4 Zuxy Meng
    char* q = buf;
107
    len /= 2;
108
    while (len--) {
109
        uint8_t tmp;
110
        PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
111 de6d9b64 Fabrice Bellard
    }
112
    *q = '\0';
113
}
114
115 c9a65ca8 Fabrice Bellard
static int asf_probe(AVProbeData *pd)
116
{
117
    /* check file header */
118
    if (pd->buf_size <= 32)
119
        return 0;
120
121 24c14d6d Michael Niedermayer
    if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
122 c9a65ca8 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
123
    else
124
        return 0;
125
}
126
127 30e88789 Michael Niedermayer
static int get_value(ByteIOContext *pb, int type){
128
    switch(type){
129
        case 2: return get_le32(pb);
130
        case 3: return get_le32(pb);
131
        case 4: return get_le64(pb);
132
        case 5: return get_le16(pb);
133
        default:return INT_MIN;
134
    }
135
}
136
137 de6d9b64 Fabrice Bellard
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
138
{
139 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
140 de6d9b64 Fabrice Bellard
    GUID g;
141
    ByteIOContext *pb = &s->pb;
142
    AVStream *st;
143
    ASFStream *asf_st;
144 e095026a Fabrice Bellard
    int size, i;
145 0c1a9eda Zdenek Kabelac
    int64_t gsize;
146 30e88789 Michael Niedermayer
    AVRational dar[128];
147
148
    memset(dar, 0, sizeof(dar));
149 de6d9b64 Fabrice Bellard
150
    get_guid(pb, &g);
151
    if (memcmp(&g, &asf_header, sizeof(GUID)))
152
        goto fail;
153
    get_le64(pb);
154
    get_le32(pb);
155
    get_byte(pb);
156
    get_byte(pb);
157 2141dc37 Zdenek Kabelac
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
158 de6d9b64 Fabrice Bellard
    for(;;) {
159
        get_guid(pb, &g);
160
        gsize = get_le64(pb);
161
#ifdef DEBUG
162 949b1a13 Steve L'Homme
        printf("%08"PRIx64": ", url_ftell(pb) - 24);
163 de6d9b64 Fabrice Bellard
        print_guid(&g);
164 949b1a13 Steve L'Homme
        printf("  size=0x%"PRIx64"\n", gsize);
165 de6d9b64 Fabrice Bellard
#endif
166
        if (gsize < 24)
167
            goto fail;
168
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
169 2a10020b Zdenek Kabelac
            get_guid(pb, &asf->hdr.guid);
170 bb270c08 Diego Biurrun
            asf->hdr.file_size          = get_le64(pb);
171
            asf->hdr.create_time        = get_le64(pb);
172 6bb2a2df Michael Niedermayer
            asf->nb_packets             = get_le64(pb);
173 bb270c08 Diego Biurrun
            asf->hdr.send_time          = get_le64(pb);
174
            asf->hdr.play_time          = get_le64(pb);
175
            asf->hdr.preroll            = get_le32(pb);
176
            asf->hdr.ignore             = get_le32(pb);
177
            asf->hdr.flags              = get_le32(pb);
178
            asf->hdr.min_pktsize        = get_le32(pb);
179
            asf->hdr.max_pktsize        = get_le32(pb);
180
            asf->hdr.max_bitrate        = get_le32(pb);
181
            asf->packet_size = asf->hdr.max_pktsize;
182 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
183 7ad5455c Michael Niedermayer
            int type, type_specific_size, sizeX;
184
            uint64_t total_size;
185 de6d9b64 Fabrice Bellard
            unsigned int tag1;
186 0c1a9eda Zdenek Kabelac
            int64_t pos1, pos2;
187 88141c91 Michael Niedermayer
            int test_for_ext_stream_audio;
188 2a10020b Zdenek Kabelac
189 de6d9b64 Fabrice Bellard
            pos1 = url_ftell(pb);
190
191 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
192 de6d9b64 Fabrice Bellard
            if (!st)
193
                goto fail;
194 9ee91c2f Michael Niedermayer
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
195 de6d9b64 Fabrice Bellard
            asf_st = av_mallocz(sizeof(ASFStream));
196
            if (!asf_st)
197
                goto fail;
198
            st->priv_data = asf_st;
199 c0df9d75 Michael Niedermayer
            st->start_time = asf->hdr.preroll;
200 73fe1052 Ryan Martell
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
201
                st->duration = asf->hdr.send_time /
202
                    (10000000 / 1000) - st->start_time;
203
            }
204 de6d9b64 Fabrice Bellard
            get_guid(pb, &g);
205 88141c91 Michael Niedermayer
206
            test_for_ext_stream_audio = 0;
207 de6d9b64 Fabrice Bellard
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
208
                type = CODEC_TYPE_AUDIO;
209
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
210
                type = CODEC_TYPE_VIDEO;
211 ae38261e Mike Brown
            } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
212
                type = CODEC_TYPE_UNKNOWN;
213 88141c91 Michael Niedermayer
            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
214
                test_for_ext_stream_audio = 1;
215
                type = CODEC_TYPE_UNKNOWN;
216 de6d9b64 Fabrice Bellard
            } else {
217
                goto fail;
218
            }
219
            get_guid(pb, &g);
220
            total_size = get_le64(pb);
221 2e7973bb Roman Shaposhnik
            type_specific_size = get_le32(pb);
222 de6d9b64 Fabrice Bellard
            get_le32(pb);
223 bb270c08 Diego Biurrun
            st->id = get_le16(pb) & 0x7f; /* stream id */
224 2a10020b Zdenek Kabelac
            // mapping of asf ID to AV stream ID;
225 247eadca Fabrice Bellard
            asf->asfid2avid[st->id] = s->nb_streams - 1;
226 2a10020b Zdenek Kabelac
227 de6d9b64 Fabrice Bellard
            get_le32(pb);
228 88141c91 Michael Niedermayer
229
            if (test_for_ext_stream_audio) {
230
                get_guid(pb, &g);
231
                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
232
                    type = CODEC_TYPE_AUDIO;
233
                    get_guid(pb, &g);
234
                    get_le32(pb);
235
                    get_le32(pb);
236
                    get_le32(pb);
237
                    get_guid(pb, &g);
238
                    get_le32(pb);
239
                }
240
            }
241
242 bb270c08 Diego Biurrun
            st->codec->codec_type = type;
243 de6d9b64 Fabrice Bellard
            if (type == CODEC_TYPE_AUDIO) {
244 01f4895c Michael Niedermayer
                get_wav_header(pb, st->codec, type_specific_size);
245 afda223c Fabrice Bellard
                st->need_parsing = 1;
246 bb270c08 Diego Biurrun
                /* We have to init the frame size at some point .... */
247
                pos2 = url_ftell(pb);
248
                if (gsize > (pos2 + 8 - pos1 + 24)) {
249
                    asf_st->ds_span = get_byte(pb);
250
                    asf_st->ds_packet_size = get_le16(pb);
251
                    asf_st->ds_chunk_size = get_le16(pb);
252 6bb2a2df Michael Niedermayer
                    get_le16(pb); //ds_data_size
253
                    get_byte(pb); //ds_silence_data
254 bb270c08 Diego Biurrun
                }
255
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
256
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
257
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
258
                if (asf_st->ds_span > 1) {
259
                    if (!asf_st->ds_chunk_size
260 05219463 Michael Niedermayer
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
261
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
262 bb270c08 Diego Biurrun
                        asf_st->ds_span = 0; // disable descrambling
263
                }
264 01f4895c Michael Niedermayer
                switch (st->codec->codec_id) {
265 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
266 01f4895c Michael Niedermayer
                    st->codec->frame_size = MPA_FRAME_SIZE;
267 f80c1ac0 Philip Gladstone
                    break;
268
                case CODEC_ID_PCM_S16LE:
269
                case CODEC_ID_PCM_S16BE:
270
                case CODEC_ID_PCM_U16LE:
271
                case CODEC_ID_PCM_U16BE:
272
                case CODEC_ID_PCM_S8:
273
                case CODEC_ID_PCM_U8:
274
                case CODEC_ID_PCM_ALAW:
275
                case CODEC_ID_PCM_MULAW:
276 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
277 f80c1ac0 Philip Gladstone
                    break;
278
                default:
279
                    /* This is probably wrong, but it prevents a crash later */
280 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
281 f80c1ac0 Philip Gladstone
                    break;
282
                }
283 88141c91 Michael Niedermayer
            } else if (type == CODEC_TYPE_VIDEO) {
284 bb270c08 Diego Biurrun
                get_le32(pb);
285 de6d9b64 Fabrice Bellard
                get_le32(pb);
286
                get_byte(pb);
287
                size = get_le16(pb); /* size */
288 0ffd77b9 Michael Niedermayer
                sizeX= get_le32(pb); /* size */
289 01f4895c Michael Niedermayer
                st->codec->width = get_le32(pb);
290 bb270c08 Diego Biurrun
                st->codec->height = get_le32(pb);
291 2a10020b Zdenek Kabelac
                /* not available for asf */
292 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
293 bb270c08 Diego Biurrun
                st->codec->bits_per_sample = get_le16(pb); /* depth */
294 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
295 bb270c08 Diego Biurrun
                url_fskip(pb, 20);
296 0ffd77b9 Michael Niedermayer
//                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
297
                size= sizeX;
298 bb270c08 Diego Biurrun
                if (size > 40) {
299
                    st->codec->extradata_size = size - 40;
300
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
301
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
302
                }
303 5e29abf8 Roberto Togni
304
        /* Extract palette from extradata if bpp <= 8 */
305
        /* This code assumes that extradata contains only palette */
306
        /* This is true for all paletted codecs implemented in ffmpeg */
307 01f4895c Michael Niedermayer
        if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
308
            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
309 5e29abf8 Roberto Togni
#ifdef WORDS_BIGENDIAN
310 01f4895c Michael Niedermayer
            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
311
                st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
312 5e29abf8 Roberto Togni
#else
313 01f4895c Michael Niedermayer
            memcpy(st->codec->palctrl->palette, st->codec->extradata,
314
                   FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
315 5e29abf8 Roberto Togni
#endif
316 01f4895c Michael Niedermayer
            st->codec->palctrl->palette_changed = 1;
317 5e29abf8 Roberto Togni
        }
318
319 01f4895c Michael Niedermayer
                st->codec->codec_tag = tag1;
320 bb270c08 Diego Biurrun
                st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
321 afbb5ce4 Michael Niedermayer
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
322
                    st->need_parsing = 1;
323 de6d9b64 Fabrice Bellard
            }
324
            pos2 = url_ftell(pb);
325
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
326
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
327 b6eaae39 Kohn Emil Dan
            asf->data_object_offset = url_ftell(pb);
328 73fe1052 Ryan Martell
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
329
            if (!(asf->hdr.flags & 0x01) && gsize != (uint64_t)-1 && gsize >= 24) {
330 b6eaae39 Kohn Emil Dan
                asf->data_object_size = gsize - 24;
331
            } else {
332
                asf->data_object_size = (uint64_t)-1;
333
            }
334 de6d9b64 Fabrice Bellard
            break;
335
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
336
            int len1, len2, len3, len4, len5;
337
338
            len1 = get_le16(pb);
339
            len2 = get_le16(pb);
340
            len3 = get_le16(pb);
341
            len4 = get_le16(pb);
342
            len5 = get_le16(pb);
343 4e15cc8b Michael Niedermayer
            get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
344
            get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
345 de6d9b64 Fabrice Bellard
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
346 4e15cc8b Michael Niedermayer
            get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
347 bb270c08 Diego Biurrun
            url_fskip(pb, len5);
348 d13431cd Kevin Kuphal
       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
349
                int desc_count, i;
350
351
                desc_count = get_le16(pb);
352
                for(i=0;i<desc_count;i++)
353
                {
354 052aa2ad Steve L'Homme
                        int name_len,value_type,value_len;
355
                        uint64_t value_num = 0;
356 d045b8c1 Michael Niedermayer
                        char name[1024];
357 d13431cd Kevin Kuphal
358
                        name_len = get_le16(pb);
359 d045b8c1 Michael Niedermayer
                        get_str16_nolen(pb, name_len, name, sizeof(name));
360 d13431cd Kevin Kuphal
                        value_type = get_le16(pb);
361
                        value_len = get_le16(pb);
362
                        if ((value_type == 0) || (value_type == 1)) // unicode or byte
363
                        {
364 5e2a4855 Michael Niedermayer
                                if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
365
                                else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
366
                                else url_fskip(pb, value_len);
367 d13431cd Kevin Kuphal
                        }
368 724dc20c Michael Niedermayer
                        if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
369 d13431cd Kevin Kuphal
                        {
370 30e88789 Michael Niedermayer
                                value_num= get_value(pb, value_type);
371 4e15cc8b Michael Niedermayer
                                if (!strcmp(name,"WM/Track"      )) s->track = value_num + 1;
372
                                if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
373 d13431cd Kevin Kuphal
                        }
374
                }
375 30e88789 Michael Niedermayer
        } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
376
            int n, stream_num, name_len, value_len, value_type, value_num;
377
            n = get_le16(pb);
378
379
            for(i=0;i<n;i++) {
380
                char name[1024];
381
382
                get_le16(pb); //lang_list_index
383
                stream_num= get_le16(pb);
384
                name_len=   get_le16(pb);
385
                value_type= get_le16(pb);
386
                value_len=  get_le32(pb);
387
388
                get_str16_nolen(pb, name_len, name, sizeof(name));
389
//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
390
                value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
391
                url_fskip(pb, value_len - 2);
392
393
                if(stream_num<128){
394
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
395
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
396
                }
397
            }
398 88141c91 Michael Niedermayer
        } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
399
            int ext_len, payload_ext_ct, stream_ct;
400
            uint32_t ext_d;
401 1bd86246 Måns Rullgård
            int64_t pos_ex_st;
402 88141c91 Michael Niedermayer
            pos_ex_st = url_ftell(pb);
403
404 de3ae959 Michael Niedermayer
            get_le64(pb); // starttime
405
            get_le64(pb); // endtime
406
            get_le32(pb); // leak-datarate
407
            get_le32(pb); // bucket-datasize
408
            get_le32(pb); // init-bucket-fullness
409
            get_le32(pb); // alt-leak-datarate
410
            get_le32(pb); // alt-bucket-datasize
411
            get_le32(pb); // alt-init-bucket-fullness
412
            get_le32(pb); // max-object-size
413
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
414
            get_le16(pb); // stream-num
415
            get_le16(pb); // stream-language-id-index
416
            get_le64(pb); // avg frametime in 100ns units
417
            stream_ct = get_le16(pb); //stream-name-count
418
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
419 88141c91 Michael Niedermayer
420
            for (i=0; i<stream_ct; i++){
421
                get_le16(pb);
422
                ext_len = get_le16(pb);
423
                url_fseek(pb, ext_len, SEEK_CUR);
424
            }
425
426
            for (i=0; i<payload_ext_ct; i++){
427
                get_guid(pb, &g);
428
                ext_d=get_le16(pb);
429
                ext_len=get_le32(pb);
430
                url_fseek(pb, ext_len, SEEK_CUR);
431
            }
432
433
            // there could be a optional stream properties object to follow
434
            // if so the next iteration will pick it up
435 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
436
            int v1, v2;
437
            get_guid(pb, &g);
438
            v1 = get_le32(pb);
439
            v2 = get_le16(pb);
440 88141c91 Michael Niedermayer
#if 0
441 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
442
            int len, v1, n, num;
443
            char str[256], *q;
444
            char tag[16];
445

446
            get_guid(pb, &g);
447
            print_guid(&g);
448 2a10020b Zdenek Kabelac

449 de6d9b64 Fabrice Bellard
            n = get_le32(pb);
450
            for(i=0;i<n;i++) {
451
                num = get_le16(pb); /* stream number */
452
                get_str16(pb, str, sizeof(str));
453
                get_str16(pb, str, sizeof(str));
454
                len = get_le16(pb);
455
                q = tag;
456
                while (len > 0) {
457
                    v1 = get_byte(pb);
458
                    if ((q - tag) < sizeof(tag) - 1)
459
                        *q++ = v1;
460
                    len--;
461
                }
462
                *q = '\0';
463
            }
464
#endif
465
        } else if (url_feof(pb)) {
466
            goto fail;
467
        } else {
468
            url_fseek(pb, gsize - 24, SEEK_CUR);
469
        }
470
    }
471
    get_guid(pb, &g);
472
    get_le64(pb);
473
    get_byte(pb);
474
    get_byte(pb);
475 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
476
        goto fail;
477
    asf->data_offset = url_ftell(pb);
478 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
479
480 30e88789 Michael Niedermayer
481
    for(i=0; i<128; i++){
482
        int stream_num= asf->asfid2avid[i];
483
        if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
484
            AVCodecContext *codec= s->streams[stream_num]->codec;
485 a836a2c8 Zuxy Meng
            av_reduce(&codec->sample_aspect_ratio.num,
486
                    &codec->sample_aspect_ratio.den,
487
                    dar[i].num, dar[i].den, INT_MAX);
488 30e88789 Michael Niedermayer
//av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
489
        }
490
    }
491
492 de6d9b64 Fabrice Bellard
    return 0;
493
494
 fail:
495 4c3dff6d Zdenek Kabelac
     for(i=0;i<s->nb_streams;i++) {
496 de6d9b64 Fabrice Bellard
        AVStream *st = s->streams[i];
497 bb270c08 Diego Biurrun
        if (st) {
498
            av_free(st->priv_data);
499 01f4895c Michael Niedermayer
            av_free(st->codec->extradata);
500 bb270c08 Diego Biurrun
        }
501 1ea4f593 Fabrice Bellard
        av_free(st);
502 de6d9b64 Fabrice Bellard
    }
503
    return -1;
504
}
505
506 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
507
    switch (bits & 3) \
508
    { \
509
    case 3: var = get_le32(pb); rsize += 4; break; \
510
    case 2: var = get_le16(pb); rsize += 2; break; \
511
    case 1: var = get_byte(pb); rsize++; break; \
512
    default: var = defval; break; \
513
    }
514
515 f7835507 Michael Niedermayer
/**
516
 *
517
 * @return <0 in case of an error
518
 */
519 de6d9b64 Fabrice Bellard
static int asf_get_packet(AVFormatContext *s)
520
{
521
    ASFContext *asf = s->priv_data;
522
    ByteIOContext *pb = &s->pb;
523 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
524 29962fea Michael Niedermayer
    int rsize = 9;
525 0fd9e6f3 Michael Niedermayer
    int c, d, e, off;
526
527
    off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
528
529
    c=d=e=-1;
530
    while(off-- > 0){
531
        c=d; d=e;
532
        e= get_byte(pb);
533
        if(c == 0x82 && !d && !e)
534
            break;
535
    }
536 115329f1 Diego Biurrun
537 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
538 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
539 bb270c08 Diego Biurrun
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
540 2a10020b Zdenek Kabelac
    }
541
    if ((c & 0x0f) == 2) { // always true for now
542 0fd9e6f3 Michael Niedermayer
        if (d || e) {
543 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
544 bb270c08 Diego Biurrun
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
545 f7835507 Michael Niedermayer
            return -1;
546 bb270c08 Diego Biurrun
        }
547 0fd9e6f3 Michael Niedermayer
        d= get_byte(pb);
548
        e= get_byte(pb);
549 29962fea Michael Niedermayer
        rsize+=2;
550
/*    }else{
551
        if (!url_feof(pb))
552 949b1a13 Steve L'Homme
            printf("ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
553 bb270c08 Diego Biurrun
        return AVERROR_IO;*/
554 de6d9b64 Fabrice Bellard
    }
555 2a10020b Zdenek Kabelac
556 0fd9e6f3 Michael Niedermayer
    asf->packet_flags = d;
557
    asf->packet_property = e;
558 2a10020b Zdenek Kabelac
559
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
560
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
561
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
562
563 5b11e081 Michael Niedermayer
    //the following checks prevent overflows and infinite loops
564
    if(packet_length >= (1U<<29)){
565
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
566 ceba96cb Michael Niedermayer
        return -1;
567 5b11e081 Michael Niedermayer
    }
568 92216453 Michael Niedermayer
    if(padsize >= packet_length){
569 5b11e081 Michael Niedermayer
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
570 ceba96cb Michael Niedermayer
        return -1;
571 5b11e081 Michael Niedermayer
    }
572
573 2a10020b Zdenek Kabelac
    asf->packet_timestamp = get_le32(pb);
574 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
575 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
576 2a10020b Zdenek Kabelac
577
    if (asf->packet_flags & 0x01) {
578 bb270c08 Diego Biurrun
        asf->packet_segsizetype = get_byte(pb); rsize++;
579 2a10020b Zdenek Kabelac
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
580
    } else {
581 bb270c08 Diego Biurrun
        asf->packet_segments = 1;
582 2a10020b Zdenek Kabelac
        asf->packet_segsizetype = 0x80;
583
    }
584
    asf->packet_size_left = packet_length - padsize - rsize;
585 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
586
        padsize += asf->hdr.min_pktsize - packet_length;
587 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
588 de6d9b64 Fabrice Bellard
#ifdef DEBUG
589 2a10020b Zdenek Kabelac
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
590 de6d9b64 Fabrice Bellard
#endif
591
    return 0;
592
}
593
594 ae60a857 Michael Niedermayer
/**
595
 *
596
 * @return <0 if error
597
 */
598
static int asf_read_frame_header(AVFormatContext *s){
599
    ASFContext *asf = s->priv_data;
600
    ByteIOContext *pb = &s->pb;
601
    int rsize = 1;
602
    int num = get_byte(pb);
603 559a55ad Michael Niedermayer
    int64_t ts0, ts1;
604 ae60a857 Michael Niedermayer
605
    asf->packet_segments--;
606
    asf->packet_key_frame = num >> 7;
607
    asf->stream_index = asf->asfid2avid[num & 0x7f];
608
    // sequence should be ignored!
609
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
610
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
611
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
612
//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);
613
    if (asf->packet_replic_size >= 8) {
614
        asf->packet_obj_size = get_le32(pb);
615
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
616
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
617
            return -1;
618
        }
619
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
620 559a55ad Michael Niedermayer
        if(asf->packet_replic_size >= 8+38+4){
621
//            for(i=0; i<asf->packet_replic_size-8; i++)
622
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
623
//            av_log(s, AV_LOG_DEBUG, "\n");
624
            url_fskip(pb, 10);
625
            ts0= get_le64(pb);
626
            ts1= get_le64(pb);
627
            url_fskip(pb, 12);
628
            get_le32(pb);
629
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
630
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
631
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
632
        }else
633
            url_fskip(pb, asf->packet_replic_size - 8);
634 ae60a857 Michael Niedermayer
        rsize += asf->packet_replic_size; // FIXME - check validity
635
    } else if (asf->packet_replic_size==1){
636
        // multipacket - frag_offset is begining timestamp
637
        asf->packet_time_start = asf->packet_frag_offset;
638
        asf->packet_frag_offset = 0;
639
        asf->packet_frag_timestamp = asf->packet_timestamp;
640
641
        asf->packet_time_delta = get_byte(pb);
642
        rsize++;
643
    }else if(asf->packet_replic_size!=0){
644
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
645
        return -1;
646
    }
647
    if (asf->packet_flags & 0x01) {
648
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
649 13f7e4b9 Michael Niedermayer
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
650
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
651
            return -1;
652
        }
653 ae60a857 Michael Niedermayer
        //printf("Fragsize %d\n", asf->packet_frag_size);
654
    } else {
655
        asf->packet_frag_size = asf->packet_size_left - rsize;
656
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
657
    }
658
    if (asf->packet_replic_size == 1) {
659
        asf->packet_multi_size = asf->packet_frag_size;
660
        if (asf->packet_multi_size > asf->packet_size_left)
661
            return -1;
662
    }
663
    asf->packet_size_left -= rsize;
664
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
665
666
    return 0;
667
}
668
669 de6d9b64 Fabrice Bellard
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
670
{
671
    ASFContext *asf = s->priv_data;
672 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
673 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
674 1359c2d4 Zdenek Kabelac
    //static int pc = 0;
675 2a10020b Zdenek Kabelac
    for (;;) {
676 ceba96cb Michael Niedermayer
        if(url_feof(pb))
677
            return AVERROR_IO;
678 bb270c08 Diego Biurrun
        if (asf->packet_size_left < FRAME_HEADER_SIZE
679
            || asf->packet_segments < 1) {
680
            //asf->packet_size_left <= asf->packet_padsize) {
681
            int ret = asf->packet_size_left + asf->packet_padsize;
682 949b1a13 Steve L'Homme
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
683 5b11e081 Michael Niedermayer
            assert(ret>=0);
684 bb270c08 Diego Biurrun
            /* fail safe */
685
            url_fskip(pb, ret);
686 b04d5d31 Michael Niedermayer
687 82b9e4a2 Michael Niedermayer
            asf->packet_pos= url_ftell(&s->pb);
688 b6eaae39 Kohn Emil Dan
            if (asf->data_object_size != (uint64_t)-1 &&
689
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
690
                return AVERROR_IO; /* Do not exceed the size of the data object */
691 bb270c08 Diego Biurrun
            ret = asf_get_packet(s);
692
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
693 ceba96cb Michael Niedermayer
            if (ret < 0)
694
                assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
695 2141dc37 Zdenek Kabelac
            asf->packet_time_start = 0;
696 2a10020b Zdenek Kabelac
            continue;
697 bb270c08 Diego Biurrun
        }
698
        if (asf->packet_time_start == 0) {
699 ae60a857 Michael Niedermayer
            if(asf_read_frame_header(s) < 0){
700
                asf->packet_segments= 0;
701 236116cb Michael Niedermayer
                continue;
702 1305a9d5 Michael Niedermayer
            }
703 bb270c08 Diego Biurrun
            if (asf->stream_index < 0
704 f3356e9c Michael Niedermayer
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
705
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
706
                ) {
707 1359c2d4 Zdenek Kabelac
                asf->packet_time_start = 0;
708 bb270c08 Diego Biurrun
                /* unhandled packet (should not happen) */
709
                url_fskip(pb, asf->packet_frag_size);
710
                asf->packet_size_left -= asf->packet_frag_size;
711 b9866ebc Michael Niedermayer
                if(asf->stream_index < 0)
712 ae60a857 Michael Niedermayer
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
713 1359c2d4 Zdenek Kabelac
                continue;
714 bb270c08 Diego Biurrun
            }
715
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
716
        }
717
        asf_st = asf->asf_st;
718
719
        if (asf->packet_replic_size == 1) {
720
            // frag_offset is here used as the begining timestamp
721
            asf->packet_frag_timestamp = asf->packet_time_start;
722
            asf->packet_time_start += asf->packet_time_delta;
723
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
724
            asf->packet_size_left--;
725 2141dc37 Zdenek Kabelac
            asf->packet_multi_size--;
726 bb270c08 Diego Biurrun
            if (asf->packet_multi_size < asf->packet_obj_size)
727
            {
728
                asf->packet_time_start = 0;
729
                url_fskip(pb, asf->packet_multi_size);
730
                asf->packet_size_left -= asf->packet_multi_size;
731 2141dc37 Zdenek Kabelac
                continue;
732 bb270c08 Diego Biurrun
            }
733
            asf->packet_multi_size -= asf->packet_obj_size;
734
            //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);
735
        }
736 f8f0a0bd Michael Niedermayer
        if (   asf_st->pkt.size != asf->packet_obj_size
737
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
738 200026aa Michael Niedermayer
            if(asf_st->pkt.data){
739
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
740
                asf_st->frag_offset = 0;
741
                av_free_packet(&asf_st->pkt);
742
            }
743 bb270c08 Diego Biurrun
            /* new packet */
744
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
745
            asf_st->seq = asf->packet_seq;
746
            asf_st->pkt.pts = asf->packet_frag_timestamp;
747
            asf_st->pkt.stream_index = asf->stream_index;
748 115329f1 Diego Biurrun
            asf_st->pkt.pos =
749
            asf_st->packet_pos= asf->packet_pos;
750
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
751 82b9e4a2 Michael Niedermayer
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
752 01f4895c Michael Niedermayer
//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
753 bb270c08 Diego Biurrun
            if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
754
                asf->packet_key_frame = 1;
755
            if (asf->packet_key_frame)
756
                asf_st->pkt.flags |= PKT_FLAG_KEY;
757
        }
758
759
        /* read data */
760
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
761
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
762
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
763
        asf->packet_size_left -= asf->packet_frag_size;
764
        if (asf->packet_size_left < 0)
765 2141dc37 Zdenek Kabelac
            continue;
766 4c71d727 Michael Niedermayer
767
        if(   asf->packet_frag_offset >= asf_st->pkt.size
768
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
769
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
770
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
771
            continue;
772
        }
773
774 bb270c08 Diego Biurrun
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
775
                   asf->packet_frag_size);
776
        asf_st->frag_offset += asf->packet_frag_size;
777
        /* test if whole packet is read */
778
        if (asf_st->frag_offset == asf_st->pkt.size) {
779
            /* return packet */
780
            if (asf_st->ds_span > 1) {
781 05219463 Michael Niedermayer
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
782
                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
783
              }else{
784 bb270c08 Diego Biurrun
                /* packet descrambling */
785 191e8ca7 Måns Rullgård
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
786 bb270c08 Diego Biurrun
                if (newdata) {
787
                    int offset = 0;
788
                    while (offset < asf_st->pkt.size) {
789
                        int off = offset / asf_st->ds_chunk_size;
790
                        int row = off / asf_st->ds_span;
791
                        int col = off % asf_st->ds_span;
792
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
793
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
794 05219463 Michael Niedermayer
795
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
796
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
797 bb270c08 Diego Biurrun
                        memcpy(newdata + offset,
798
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
799
                               asf_st->ds_chunk_size);
800
                        offset += asf_st->ds_chunk_size;
801
                    }
802
                    av_free(asf_st->pkt.data);
803
                    asf_st->pkt.data = newdata;
804
                }
805 05219463 Michael Niedermayer
              }
806 bb270c08 Diego Biurrun
            }
807
            asf_st->frag_offset = 0;
808 b83e83b9 Michael Niedermayer
            *pkt= asf_st->pkt;
809 bb270c08 Diego Biurrun
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
810
            asf_st->pkt.size = 0;
811
            asf_st->pkt.data = 0;
812
            break; // packet completed
813
        }
814 de6d9b64 Fabrice Bellard
    }
815
    return 0;
816
}
817
818
static int asf_read_close(AVFormatContext *s)
819
{
820
    int i;
821
822
    for(i=0;i<s->nb_streams;i++) {
823 bb270c08 Diego Biurrun
        AVStream *st = s->streams[i];
824
        av_free(st->priv_data);
825 1ae7518d Michael Niedermayer
        av_free(st->codec->palctrl);
826 de6d9b64 Fabrice Bellard
    }
827
    return 0;
828
}
829
830 38376f00 Kevin Kuphal
// Added to support seeking after packets have been read
831
// If information is not reset, read_packet fails due to
832
// leftover information from previous reads
833
static void asf_reset_header(AVFormatContext *s)
834
{
835
    ASFContext *asf = s->priv_data;
836 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
837
    int i;
838 38376f00 Kevin Kuphal
839
    asf->packet_nb_frames = 0;
840
    asf->packet_size_left = 0;
841
    asf->packet_segments = 0;
842
    asf->packet_flags = 0;
843
    asf->packet_property = 0;
844
    asf->packet_timestamp = 0;
845
    asf->packet_segsizetype = 0;
846
    asf->packet_segments = 0;
847
    asf->packet_seq = 0;
848
    asf->packet_replic_size = 0;
849
    asf->packet_key_frame = 0;
850
    asf->packet_padsize = 0;
851
    asf->packet_frag_offset = 0;
852
    asf->packet_frag_size = 0;
853
    asf->packet_frag_timestamp = 0;
854
    asf->packet_multi_size = 0;
855
    asf->packet_obj_size = 0;
856
    asf->packet_time_delta = 0;
857
    asf->packet_time_start = 0;
858 115329f1 Diego Biurrun
859 82b9e4a2 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
860
        asf_st= s->streams[i]->priv_data;
861
        av_free_packet(&asf_st->pkt);
862
        asf_st->frag_offset=0;
863
        asf_st->seq=0;
864
    }
865
    asf->asf_st= NULL;
866 38376f00 Kevin Kuphal
}
867
868 8d14a25c Michael Niedermayer
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
869 38376f00 Kevin Kuphal
{
870
    ASFContext *asf = s->priv_data;
871
    AVPacket pkt1, *pkt = &pkt1;
872 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
873 580fb5e7 Michael Niedermayer
    int64_t pts;
874 82b9e4a2 Michael Niedermayer
    int64_t pos= *ppos;
875 3e9245a9 Michael Niedermayer
    int i;
876
    int64_t start_pos[s->nb_streams];
877 115329f1 Diego Biurrun
878 3e9245a9 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
879
        start_pos[i]= pos;
880
    }
881 115329f1 Diego Biurrun
882 8d14a25c Michael Niedermayer
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
883
    *ppos= pos;
884
    url_fseek(&s->pb, pos, SEEK_SET);
885 115329f1 Diego Biurrun
886 82b9e4a2 Michael Niedermayer
//printf("asf_read_pts\n");
887
    asf_reset_header(s);
888 3e9245a9 Michael Niedermayer
    for(;;){
889 82b9e4a2 Michael Niedermayer
        if (av_read_frame(s, pkt) < 0){
890 0b93103a Michael Niedermayer
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
891 bb270c08 Diego Biurrun
            return AV_NOPTS_VALUE;
892 82b9e4a2 Michael Niedermayer
        }
893 115329f1 Diego Biurrun
894 38cf2a72 Michael Niedermayer
        pts= pkt->pts;
895 580fb5e7 Michael Niedermayer
896
        av_free_packet(pkt);
897 3e9245a9 Michael Niedermayer
        if(pkt->flags&PKT_FLAG_KEY){
898
            i= pkt->stream_index;
899
900
            asf_st= s->streams[i]->priv_data;
901
902 0fd9e6f3 Michael Niedermayer
//            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
903 8d14a25c Michael Niedermayer
            pos= asf_st->packet_pos;
904 09646bab Michael Niedermayer
905 52e54612 Michael Niedermayer
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
906 8d14a25c Michael Niedermayer
            start_pos[i]= asf_st->packet_pos + 1;
907 115329f1 Diego Biurrun
908 3e9245a9 Michael Niedermayer
            if(pkt->stream_index == stream_index)
909
               break;
910
        }
911
    }
912
913
    *ppos= pos;
914 949b1a13 Steve L'Homme
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
915 580fb5e7 Michael Niedermayer
916
    return pts;
917 38376f00 Kevin Kuphal
}
918
919 56c96a22 Michael Niedermayer
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
920
{
921
    GUID g;
922
    ASFContext *asf = s->priv_data;
923
    int64_t gsize, itime;
924
    int64_t pos, current_pos, index_pts;
925
    int i;
926
    int pct,ict;
927
928
    current_pos = url_ftell(&s->pb);
929
930
    url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
931
    get_guid(&s->pb, &g);
932
    if (!memcmp(&g, &index_guid, sizeof(GUID))) {
933
        gsize = get_le64(&s->pb);
934
        get_guid(&s->pb, &g);
935
        itime=get_le64(&s->pb);
936
        pct=get_le32(&s->pb);
937
        ict=get_le32(&s->pb);
938 ccd3228e Dominik Mierzejewski
        av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
939 56c96a22 Michael Niedermayer
940
        for (i=0;i<ict;i++){
941
            int pktnum=get_le32(&s->pb);
942
            int pktct =get_le16(&s->pb);
943
            av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
944
945
            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
946
            index_pts=av_rescale(itime, i, 10000);
947
948
            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
949
        }
950 52e54612 Michael Niedermayer
        asf->index_read= 1;
951 56c96a22 Michael Niedermayer
    }
952
    url_fseek(&s->pb, current_pos, SEEK_SET);
953
}
954
955 3ba1438d Michael Niedermayer
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
956 2a10020b Zdenek Kabelac
{
957 afda223c Fabrice Bellard
    ASFContext *asf = s->priv_data;
958 56c96a22 Michael Niedermayer
    AVStream *st = s->streams[stream_index];
959
    int64_t pos;
960
    int index;
961 115329f1 Diego Biurrun
962 a602556e Michael Niedermayer
    if (asf->packet_size <= 0)
963 38376f00 Kevin Kuphal
        return -1;
964
965 52e54612 Michael Niedermayer
    if (!asf->index_read)
966 56c96a22 Michael Niedermayer
        asf_build_simple_index(s, stream_index);
967
968 52e54612 Michael Niedermayer
    if(!(asf->index_read && st->index_entries)){
969 56c96a22 Michael Niedermayer
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
970
            return -1;
971
    }else{
972
        index= av_index_search_timestamp(st, pts, flags);
973
        if(index<0)
974
            return -1;
975
976
        /* find the position */
977
        pos = st->index_entries[index].pos;
978
        pts = st->index_entries[index].timestamp;
979
980
    // various attempts to find key frame have failed so far
981
    //    asf_reset_header(s);
982
    //    url_fseek(&s->pb, pos, SEEK_SET);
983
    //    key_pos = pos;
984
    //     for(i=0;i<16;i++){
985
    //         pos = url_ftell(&s->pb);
986
    //         if (av_read_frame(s, &pkt) < 0){
987
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
988
    //             return -1;
989
    //         }
990
    //         asf_st = s->streams[stream_index]->priv_data;
991
    //         pos += st->parser->frame_offset;
992
    //
993
    //         if (pkt.size > b) {
994
    //             b = pkt.size;
995
    //             key_pos = pos;
996
    //         }
997
    //
998
    //         av_free_packet(&pkt);
999
    //     }
1000
1001
        /* do the seek */
1002 ccd3228e Dominik Mierzejewski
        av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1003 56c96a22 Michael Niedermayer
        url_fseek(&s->pb, pos, SEEK_SET);
1004
    }
1005 38376f00 Kevin Kuphal
    asf_reset_header(s);
1006
    return 0;
1007 2a10020b Zdenek Kabelac
}
1008
1009 ff70e601 Måns Rullgård
AVInputFormat asf_demuxer = {
1010 c9a65ca8 Fabrice Bellard
    "asf",
1011
    "asf format",
1012
    sizeof(ASFContext),
1013
    asf_probe,
1014
    asf_read_header,
1015
    asf_read_packet,
1016
    asf_read_close,
1017 2a10020b Zdenek Kabelac
    asf_read_seek,
1018 8d14a25c Michael Niedermayer
    asf_read_pts,
1019 c9a65ca8 Fabrice Bellard
};