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ffmpeg / libavformat / asf.c @ 20cd83e2

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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 de6d9b64 Fabrice Bellard
26 580fb5e7 Michael Niedermayer
#undef NDEBUG
27
#include <assert.h>
28
29 615b92fd Konstantin Andreyev
#define FRAME_HEADER_SIZE 17
30 115329f1 Diego Biurrun
// Fix Me! FRAME_HEADER_SIZE may be different.
31 615b92fd Konstantin Andreyev
32 de6d9b64 Fabrice Bellard
static const GUID index_guid = {
33
    0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
34
};
35
36
/**********************************/
37
/* decoding */
38
39
//#define DEBUG
40
41
#ifdef DEBUG
42 5082f759 François Revol
#define PRINT_IF_GUID(g,cmp) \
43
if (!memcmp(g, &cmp, sizeof(GUID))) \
44
    printf("(GUID: %s) ", #cmp)
45
46 de6d9b64 Fabrice Bellard
static void print_guid(const GUID *g)
47
{
48
    int i;
49 5082f759 François Revol
    PRINT_IF_GUID(g, asf_header);
50
    else PRINT_IF_GUID(g, file_header);
51
    else PRINT_IF_GUID(g, stream_header);
52
    else PRINT_IF_GUID(g, audio_stream);
53
    else PRINT_IF_GUID(g, audio_conceal_none);
54
    else PRINT_IF_GUID(g, video_stream);
55
    else PRINT_IF_GUID(g, video_conceal_none);
56 ae38261e Mike Brown
    else PRINT_IF_GUID(g, command_stream);
57 5082f759 François Revol
    else PRINT_IF_GUID(g, comment_header);
58
    else PRINT_IF_GUID(g, codec_comment_header);
59
    else PRINT_IF_GUID(g, codec_comment1_header);
60
    else PRINT_IF_GUID(g, data_header);
61
    else PRINT_IF_GUID(g, index_guid);
62
    else PRINT_IF_GUID(g, head1_guid);
63
    else PRINT_IF_GUID(g, head2_guid);
64
    else PRINT_IF_GUID(g, my_guid);
65 88141c91 Michael Niedermayer
    else PRINT_IF_GUID(g, ext_stream_header);
66
    else PRINT_IF_GUID(g, extended_content_header);
67
    else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
68
    else PRINT_IF_GUID(g, ext_stream_audio_stream);
69 5082f759 François Revol
    else
70
        printf("(GUID: unknown) ");
71 de6d9b64 Fabrice Bellard
    printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
72 2a10020b Zdenek Kabelac
    for(i=0;i<8;i++)
73 de6d9b64 Fabrice Bellard
        printf(" 0x%02x,", g->v4[i]);
74
    printf("}\n");
75
}
76 6df84c3a Alex Beregszaszi
#undef PRINT_IF_GUID
77 de6d9b64 Fabrice Bellard
#endif
78
79
static void get_guid(ByteIOContext *s, GUID *g)
80
{
81
    int i;
82
83
    g->v1 = get_le32(s);
84
    g->v2 = get_le16(s);
85
    g->v3 = get_le16(s);
86
    for(i=0;i<8;i++)
87
        g->v4[i] = get_byte(s);
88
}
89
90
#if 0
91
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
92
{
93
    int len, c;
94
    char *q;
95

96
    len = get_le16(pb);
97
    q = buf;
98
    while (len > 0) {
99
        c = get_le16(pb);
100
        if ((q - buf) < buf_size - 1)
101
            *q++ = c;
102
        len--;
103
    }
104
    *q = '\0';
105
}
106
#endif
107
108
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
109
{
110
    int c;
111
    char *q;
112
113
    q = buf;
114
    while (len > 0) {
115
        c = get_le16(pb);
116
        if ((q - buf) < buf_size - 1)
117
            *q++ = c;
118
        len-=2;
119
    }
120
    *q = '\0';
121
}
122
123 c9a65ca8 Fabrice Bellard
static int asf_probe(AVProbeData *pd)
124
{
125
    GUID g;
126
    const unsigned char *p;
127
    int i;
128
129
    /* check file header */
130
    if (pd->buf_size <= 32)
131
        return 0;
132
    p = pd->buf;
133
    g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
134
    p += 4;
135
    g.v2 = p[0] | (p[1] << 8);
136
    p += 2;
137
    g.v3 = p[0] | (p[1] << 8);
138
    p += 2;
139
    for(i=0;i<8;i++)
140
        g.v4[i] = *p++;
141
142
    if (!memcmp(&g, &asf_header, sizeof(GUID)))
143
        return AVPROBE_SCORE_MAX;
144
    else
145
        return 0;
146
}
147
148 de6d9b64 Fabrice Bellard
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
149
{
150 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
151 de6d9b64 Fabrice Bellard
    GUID g;
152
    ByteIOContext *pb = &s->pb;
153
    AVStream *st;
154
    ASFStream *asf_st;
155 e095026a Fabrice Bellard
    int size, i;
156 0c1a9eda Zdenek Kabelac
    int64_t gsize;
157 de6d9b64 Fabrice Bellard
158
    get_guid(pb, &g);
159
    if (memcmp(&g, &asf_header, sizeof(GUID)))
160
        goto fail;
161
    get_le64(pb);
162
    get_le32(pb);
163
    get_byte(pb);
164
    get_byte(pb);
165 2141dc37 Zdenek Kabelac
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
166 de6d9b64 Fabrice Bellard
    for(;;) {
167
        get_guid(pb, &g);
168
        gsize = get_le64(pb);
169
#ifdef DEBUG
170
        printf("%08Lx: ", url_ftell(pb) - 24);
171
        print_guid(&g);
172
        printf("  size=0x%Lx\n", gsize);
173
#endif
174
        if (gsize < 24)
175
            goto fail;
176
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
177 2a10020b Zdenek Kabelac
            get_guid(pb, &asf->hdr.guid);
178 bb270c08 Diego Biurrun
            asf->hdr.file_size          = get_le64(pb);
179
            asf->hdr.create_time        = get_le64(pb);
180
            asf->hdr.packets_count      = get_le64(pb);
181
            asf->hdr.send_time          = get_le64(pb);
182
            asf->hdr.play_time          = get_le64(pb);
183
            asf->hdr.preroll            = get_le32(pb);
184
            asf->hdr.ignore             = get_le32(pb);
185
            asf->hdr.flags              = get_le32(pb);
186
            asf->hdr.min_pktsize        = get_le32(pb);
187
            asf->hdr.max_pktsize        = get_le32(pb);
188
            asf->hdr.max_bitrate        = get_le32(pb);
189
            asf->packet_size = asf->hdr.max_pktsize;
190 2141dc37 Zdenek Kabelac
            asf->nb_packets = asf->hdr.packets_count;
191 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
192 7ad5455c Michael Niedermayer
            int type, type_specific_size, sizeX;
193
            uint64_t total_size;
194 de6d9b64 Fabrice Bellard
            unsigned int tag1;
195 0c1a9eda Zdenek Kabelac
            int64_t pos1, pos2;
196 88141c91 Michael Niedermayer
            int test_for_ext_stream_audio;
197 2a10020b Zdenek Kabelac
198 de6d9b64 Fabrice Bellard
            pos1 = url_ftell(pb);
199
200 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
201 de6d9b64 Fabrice Bellard
            if (!st)
202
                goto fail;
203 9ee91c2f Michael Niedermayer
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
204 de6d9b64 Fabrice Bellard
            asf_st = av_mallocz(sizeof(ASFStream));
205
            if (!asf_st)
206
                goto fail;
207
            st->priv_data = asf_st;
208 c0df9d75 Michael Niedermayer
            st->start_time = asf->hdr.preroll;
209 115329f1 Diego Biurrun
            st->duration = asf->hdr.send_time /
210 c0df9d75 Michael Niedermayer
                (10000000 / 1000) - st->start_time;
211 de6d9b64 Fabrice Bellard
            get_guid(pb, &g);
212 88141c91 Michael Niedermayer
213
            test_for_ext_stream_audio = 0;
214 de6d9b64 Fabrice Bellard
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
215
                type = CODEC_TYPE_AUDIO;
216
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
217
                type = CODEC_TYPE_VIDEO;
218 ae38261e Mike Brown
            } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
219
                type = CODEC_TYPE_UNKNOWN;
220 88141c91 Michael Niedermayer
            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
221
                test_for_ext_stream_audio = 1;
222
                type = CODEC_TYPE_UNKNOWN;
223 de6d9b64 Fabrice Bellard
            } else {
224
                goto fail;
225
            }
226
            get_guid(pb, &g);
227
            total_size = get_le64(pb);
228 2e7973bb Roman Shaposhnik
            type_specific_size = get_le32(pb);
229 de6d9b64 Fabrice Bellard
            get_le32(pb);
230 bb270c08 Diego Biurrun
            st->id = get_le16(pb) & 0x7f; /* stream id */
231 2a10020b Zdenek Kabelac
            // mapping of asf ID to AV stream ID;
232 247eadca Fabrice Bellard
            asf->asfid2avid[st->id] = s->nb_streams - 1;
233 2a10020b Zdenek Kabelac
234 de6d9b64 Fabrice Bellard
            get_le32(pb);
235 88141c91 Michael Niedermayer
236
            if (test_for_ext_stream_audio) {
237
                get_guid(pb, &g);
238
                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
239
                    type = CODEC_TYPE_AUDIO;
240
                    get_guid(pb, &g);
241
                    get_le32(pb);
242
                    get_le32(pb);
243
                    get_le32(pb);
244
                    get_guid(pb, &g);
245
                    get_le32(pb);
246
                }
247
            }
248
249 bb270c08 Diego Biurrun
            st->codec->codec_type = type;
250 de6d9b64 Fabrice Bellard
            if (type == CODEC_TYPE_AUDIO) {
251 01f4895c Michael Niedermayer
                get_wav_header(pb, st->codec, type_specific_size);
252 afda223c Fabrice Bellard
                st->need_parsing = 1;
253 bb270c08 Diego Biurrun
                /* We have to init the frame size at some point .... */
254
                pos2 = url_ftell(pb);
255
                if (gsize > (pos2 + 8 - pos1 + 24)) {
256
                    asf_st->ds_span = get_byte(pb);
257
                    asf_st->ds_packet_size = get_le16(pb);
258
                    asf_st->ds_chunk_size = get_le16(pb);
259
                    asf_st->ds_data_size = get_le16(pb);
260
                    asf_st->ds_silence_data = get_byte(pb);
261
                }
262
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
263
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
264
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
265
                if (asf_st->ds_span > 1) {
266
                    if (!asf_st->ds_chunk_size
267
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
268
                        asf_st->ds_span = 0; // disable descrambling
269
                }
270 01f4895c Michael Niedermayer
                switch (st->codec->codec_id) {
271 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
272 01f4895c Michael Niedermayer
                    st->codec->frame_size = MPA_FRAME_SIZE;
273 f80c1ac0 Philip Gladstone
                    break;
274
                case CODEC_ID_PCM_S16LE:
275
                case CODEC_ID_PCM_S16BE:
276
                case CODEC_ID_PCM_U16LE:
277
                case CODEC_ID_PCM_U16BE:
278
                case CODEC_ID_PCM_S8:
279
                case CODEC_ID_PCM_U8:
280
                case CODEC_ID_PCM_ALAW:
281
                case CODEC_ID_PCM_MULAW:
282 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
283 f80c1ac0 Philip Gladstone
                    break;
284
                default:
285
                    /* This is probably wrong, but it prevents a crash later */
286 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
287 f80c1ac0 Philip Gladstone
                    break;
288
                }
289 88141c91 Michael Niedermayer
            } else if (type == CODEC_TYPE_VIDEO) {
290 bb270c08 Diego Biurrun
                get_le32(pb);
291 de6d9b64 Fabrice Bellard
                get_le32(pb);
292
                get_byte(pb);
293
                size = get_le16(pb); /* size */
294 0ffd77b9 Michael Niedermayer
                sizeX= get_le32(pb); /* size */
295 01f4895c Michael Niedermayer
                st->codec->width = get_le32(pb);
296 bb270c08 Diego Biurrun
                st->codec->height = get_le32(pb);
297 2a10020b Zdenek Kabelac
                /* not available for asf */
298 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
299 bb270c08 Diego Biurrun
                st->codec->bits_per_sample = get_le16(pb); /* depth */
300 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
301 bb270c08 Diego Biurrun
                url_fskip(pb, 20);
302 0ffd77b9 Michael Niedermayer
//                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
303
                size= sizeX;
304 bb270c08 Diego Biurrun
                if (size > 40) {
305
                    st->codec->extradata_size = size - 40;
306
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
307
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
308
                }
309 5e29abf8 Roberto Togni
310
        /* Extract palette from extradata if bpp <= 8 */
311
        /* This code assumes that extradata contains only palette */
312
        /* This is true for all paletted codecs implemented in ffmpeg */
313 01f4895c Michael Niedermayer
        if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
314
            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
315 5e29abf8 Roberto Togni
#ifdef WORDS_BIGENDIAN
316 01f4895c Michael Niedermayer
            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
317
                st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
318 5e29abf8 Roberto Togni
#else
319 01f4895c Michael Niedermayer
            memcpy(st->codec->palctrl->palette, st->codec->extradata,
320
                   FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
321 5e29abf8 Roberto Togni
#endif
322 01f4895c Michael Niedermayer
            st->codec->palctrl->palette_changed = 1;
323 5e29abf8 Roberto Togni
        }
324
325 01f4895c Michael Niedermayer
                st->codec->codec_tag = tag1;
326 bb270c08 Diego Biurrun
                st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
327 afbb5ce4 Michael Niedermayer
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
328
                    st->need_parsing = 1;
329 de6d9b64 Fabrice Bellard
            }
330
            pos2 = url_ftell(pb);
331
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
332
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
333 b6eaae39 Kohn Emil Dan
            asf->data_object_offset = url_ftell(pb);
334
            if (gsize != (uint64_t)-1 && gsize >= 24) {
335
                asf->data_object_size = gsize - 24;
336
            } else {
337
                asf->data_object_size = (uint64_t)-1;
338
            }
339 de6d9b64 Fabrice Bellard
            break;
340
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
341
            int len1, len2, len3, len4, len5;
342
343
            len1 = get_le16(pb);
344
            len2 = get_le16(pb);
345
            len3 = get_le16(pb);
346
            len4 = get_le16(pb);
347
            len5 = get_le16(pb);
348
            get_str16_nolen(pb, len1, s->title, sizeof(s->title));
349
            get_str16_nolen(pb, len2, s->author, sizeof(s->author));
350
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
351
            get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
352 bb270c08 Diego Biurrun
            url_fskip(pb, len5);
353 d13431cd Kevin Kuphal
       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
354
                int desc_count, i;
355
356
                desc_count = get_le16(pb);
357
                for(i=0;i<desc_count;i++)
358
                {
359 052aa2ad Steve L'Homme
                        int name_len,value_type,value_len;
360
                        uint64_t value_num = 0;
361 d13431cd Kevin Kuphal
                        char *name, *value;
362
363
                        name_len = get_le16(pb);
364
                        name = (char *)av_mallocz(name_len);
365
                        get_str16_nolen(pb, name_len, name, name_len);
366
                        value_type = get_le16(pb);
367
                        value_len = get_le16(pb);
368
                        if ((value_type == 0) || (value_type == 1)) // unicode or byte
369
                        {
370
                                value = (char *)av_mallocz(value_len);
371
                                get_str16_nolen(pb, value_len, value, value_len);
372 0ecca7a4 Michael Niedermayer
                                if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
373 d13431cd Kevin Kuphal
                                av_free(value);
374
                        }
375 724dc20c Michael Niedermayer
                        if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
376 d13431cd Kevin Kuphal
                        {
377
                                if (value_type==2) value_num = get_le32(pb);
378
                                if (value_type==3) value_num = get_le32(pb);
379
                                if (value_type==4) value_num = get_le64(pb);
380
                                if (value_type==5) value_num = get_le16(pb);
381
                                if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
382
                                if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
383
                        }
384
                        av_free(name);
385
                }
386 88141c91 Michael Niedermayer
        } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
387
            int ext_len, payload_ext_ct, stream_ct;
388
            uint32_t ext_d;
389 1bd86246 Måns Rullgård
            int64_t pos_ex_st;
390 88141c91 Michael Niedermayer
            pos_ex_st = url_ftell(pb);
391
392
            get_le64(pb);
393
            get_le64(pb);
394
            get_le32(pb);
395
            get_le32(pb);
396
            get_le32(pb);
397
            get_le32(pb);
398
            get_le32(pb);
399
            get_le32(pb);
400
            get_le32(pb);
401
            get_le32(pb);
402
            get_le16(pb);
403
            get_le16(pb);
404
            get_le64(pb);
405
            stream_ct = get_le16(pb);
406
            payload_ext_ct = get_le16(pb);
407
408
            for (i=0; i<stream_ct; i++){
409
                get_le16(pb);
410
                ext_len = get_le16(pb);
411
                url_fseek(pb, ext_len, SEEK_CUR);
412
            }
413
414
            for (i=0; i<payload_ext_ct; i++){
415
                get_guid(pb, &g);
416
                ext_d=get_le16(pb);
417
                ext_len=get_le32(pb);
418
                url_fseek(pb, ext_len, SEEK_CUR);
419
            }
420
421
            // there could be a optional stream properties object to follow
422
            // if so the next iteration will pick it up
423 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
424
            int v1, v2;
425
            get_guid(pb, &g);
426
            v1 = get_le32(pb);
427
            v2 = get_le16(pb);
428 88141c91 Michael Niedermayer
#if 0
429 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
430
            int len, v1, n, num;
431
            char str[256], *q;
432
            char tag[16];
433

434
            get_guid(pb, &g);
435
            print_guid(&g);
436 2a10020b Zdenek Kabelac

437 de6d9b64 Fabrice Bellard
            n = get_le32(pb);
438
            for(i=0;i<n;i++) {
439
                num = get_le16(pb); /* stream number */
440
                get_str16(pb, str, sizeof(str));
441
                get_str16(pb, str, sizeof(str));
442
                len = get_le16(pb);
443
                q = tag;
444
                while (len > 0) {
445
                    v1 = get_byte(pb);
446
                    if ((q - tag) < sizeof(tag) - 1)
447
                        *q++ = v1;
448
                    len--;
449
                }
450
                *q = '\0';
451
            }
452
#endif
453
        } else if (url_feof(pb)) {
454
            goto fail;
455
        } else {
456
            url_fseek(pb, gsize - 24, SEEK_CUR);
457
        }
458
    }
459
    get_guid(pb, &g);
460
    get_le64(pb);
461
    get_byte(pb);
462
    get_byte(pb);
463 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
464
        goto fail;
465
    asf->data_offset = url_ftell(pb);
466 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
467
468
    return 0;
469
470
 fail:
471 4c3dff6d Zdenek Kabelac
     for(i=0;i<s->nb_streams;i++) {
472 de6d9b64 Fabrice Bellard
        AVStream *st = s->streams[i];
473 bb270c08 Diego Biurrun
        if (st) {
474
            av_free(st->priv_data);
475 01f4895c Michael Niedermayer
            av_free(st->codec->extradata);
476 bb270c08 Diego Biurrun
        }
477 1ea4f593 Fabrice Bellard
        av_free(st);
478 de6d9b64 Fabrice Bellard
    }
479
    return -1;
480
}
481
482 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
483
    switch (bits & 3) \
484
    { \
485
    case 3: var = get_le32(pb); rsize += 4; break; \
486
    case 2: var = get_le16(pb); rsize += 2; break; \
487
    case 1: var = get_byte(pb); rsize++; break; \
488
    default: var = defval; break; \
489
    }
490
491 de6d9b64 Fabrice Bellard
static int asf_get_packet(AVFormatContext *s)
492
{
493
    ASFContext *asf = s->priv_data;
494
    ByteIOContext *pb = &s->pb;
495 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
496 29962fea Michael Niedermayer
    int rsize = 9;
497
    int c;
498 115329f1 Diego Biurrun
499 29962fea Michael Niedermayer
    assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
500 115329f1 Diego Biurrun
501 29962fea Michael Niedermayer
    c = get_byte(pb);
502 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
503 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
504 bb270c08 Diego Biurrun
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
505 2a10020b Zdenek Kabelac
    }
506
    if ((c & 0x0f) == 2) { // always true for now
507 bb270c08 Diego Biurrun
        if (get_le16(pb) != 0) {
508 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
509 bb270c08 Diego Biurrun
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
510
            return AVERROR_IO;
511
        }
512 29962fea Michael Niedermayer
        rsize+=2;
513
/*    }else{
514
        if (!url_feof(pb))
515 bb270c08 Diego Biurrun
            printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
516
        return AVERROR_IO;*/
517 de6d9b64 Fabrice Bellard
    }
518 2a10020b Zdenek Kabelac
519
    asf->packet_flags = get_byte(pb);
520
    asf->packet_property = get_byte(pb);
521
522
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
523
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
524
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
525
526 5b11e081 Michael Niedermayer
    //the following checks prevent overflows and infinite loops
527
    if(packet_length >= (1U<<29)){
528
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
529
        return 0; // FIXME this should be -1
530
    }
531
    if(padsize >= (1U<<29)){
532
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
533
        return 0; // FIXME this should be -1
534
    }
535
536 2a10020b Zdenek Kabelac
    asf->packet_timestamp = get_le32(pb);
537 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
538 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
539 2a10020b Zdenek Kabelac
540
    if (asf->packet_flags & 0x01) {
541 bb270c08 Diego Biurrun
        asf->packet_segsizetype = get_byte(pb); rsize++;
542 2a10020b Zdenek Kabelac
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
543
    } else {
544 bb270c08 Diego Biurrun
        asf->packet_segments = 1;
545 2a10020b Zdenek Kabelac
        asf->packet_segsizetype = 0x80;
546
    }
547
    asf->packet_size_left = packet_length - padsize - rsize;
548 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
549
        padsize += asf->hdr.min_pktsize - packet_length;
550 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
551 de6d9b64 Fabrice Bellard
#ifdef DEBUG
552 2a10020b Zdenek Kabelac
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
553 de6d9b64 Fabrice Bellard
#endif
554
    return 0;
555
}
556
557
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
558
{
559
    ASFContext *asf = s->priv_data;
560 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
561 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
562 1359c2d4 Zdenek Kabelac
    //static int pc = 0;
563 2a10020b Zdenek Kabelac
    for (;;) {
564 bb270c08 Diego Biurrun
        int rsize = 0;
565
        if (asf->packet_size_left < FRAME_HEADER_SIZE
566
            || asf->packet_segments < 1) {
567
            //asf->packet_size_left <= asf->packet_padsize) {
568
            int ret = asf->packet_size_left + asf->packet_padsize;
569
            //printf("PacketLeftSize:%d  Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
570 47627aec Michael Niedermayer
            if((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size)
571
                ret += asf->packet_size - ((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size);
572 5b11e081 Michael Niedermayer
            assert(ret>=0);
573 bb270c08 Diego Biurrun
            /* fail safe */
574
            url_fskip(pb, ret);
575 82b9e4a2 Michael Niedermayer
            asf->packet_pos= url_ftell(&s->pb);
576 b6eaae39 Kohn Emil Dan
            if (asf->data_object_size != (uint64_t)-1 &&
577
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
578
                return AVERROR_IO; /* Do not exceed the size of the data object */
579 bb270c08 Diego Biurrun
            ret = asf_get_packet(s);
580
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
581
            if (ret < 0 || url_feof(pb))
582
                return AVERROR_IO;
583 2141dc37 Zdenek Kabelac
            asf->packet_time_start = 0;
584 2a10020b Zdenek Kabelac
            continue;
585 bb270c08 Diego Biurrun
        }
586
        if (asf->packet_time_start == 0) {
587
            /* read frame header */
588 1359c2d4 Zdenek Kabelac
            int num = get_byte(pb);
589 bb270c08 Diego Biurrun
            asf->packet_segments--;
590
            rsize++;
591
            asf->packet_key_frame = (num & 0x80) >> 7;
592
            asf->stream_index = asf->asfid2avid[num & 0x7f];
593
            // sequence should be ignored!
594
            DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
595
            DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
596
            DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
597 82b9e4a2 Michael Niedermayer
//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);
598 bb270c08 Diego Biurrun
            if (asf->packet_replic_size > 1) {
599 1305a9d5 Michael Niedermayer
                assert(asf->packet_replic_size >= 8);
600 2a10020b Zdenek Kabelac
                // it should be always at least 8 bytes - FIXME validate
601 bb270c08 Diego Biurrun
                asf->packet_obj_size = get_le32(pb);
602
                asf->packet_frag_timestamp = get_le32(pb); // timestamp
603
                if (asf->packet_replic_size > 8)
604
                    url_fskip(pb, asf->packet_replic_size - 8);
605
                rsize += asf->packet_replic_size; // FIXME - check validity
606
            } else if (asf->packet_replic_size==1){
607
                // multipacket - frag_offset is begining timestamp
608
                asf->packet_time_start = asf->packet_frag_offset;
609 2a10020b Zdenek Kabelac
                asf->packet_frag_offset = 0;
610 bb270c08 Diego Biurrun
                asf->packet_frag_timestamp = asf->packet_timestamp;
611 2141dc37 Zdenek Kabelac
612 1305a9d5 Michael Niedermayer
                asf->packet_time_delta = get_byte(pb);
613 bb270c08 Diego Biurrun
                rsize++;
614
            }else{
615 1305a9d5 Michael Niedermayer
                assert(asf->packet_replic_size==0);
616
            }
617 bb270c08 Diego Biurrun
            if (asf->packet_flags & 0x01) {
618
                DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
619 acbe6cfa Zdenek Kabelac
#undef DO_2BITS
620 bb270c08 Diego Biurrun
                //printf("Fragsize %d\n", asf->packet_frag_size);
621
            } else {
622
                asf->packet_frag_size = asf->packet_size_left - rsize;
623
                //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
624
            }
625
            if (asf->packet_replic_size == 1) {
626
                asf->packet_multi_size = asf->packet_frag_size;
627
                if (asf->packet_multi_size > asf->packet_size_left) {
628
                    asf->packet_segments = 0;
629 2141dc37 Zdenek Kabelac
                    continue;
630 bb270c08 Diego Biurrun
                }
631
            }
632
            asf->packet_size_left -= rsize;
633
            //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
634 1359c2d4 Zdenek Kabelac
635 bb270c08 Diego Biurrun
            if (asf->stream_index < 0
636 f3356e9c Michael Niedermayer
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
637
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
638
                ) {
639 1359c2d4 Zdenek Kabelac
                asf->packet_time_start = 0;
640 bb270c08 Diego Biurrun
                /* unhandled packet (should not happen) */
641
                url_fskip(pb, asf->packet_frag_size);
642
                asf->packet_size_left -= asf->packet_frag_size;
643 b9866ebc Michael Niedermayer
                if(asf->stream_index < 0)
644
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d  %d\n", asf->packet_frag_size, num & 0x7f);
645 1359c2d4 Zdenek Kabelac
                continue;
646 bb270c08 Diego Biurrun
            }
647
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
648
        }
649
        asf_st = asf->asf_st;
650
651
        if ((asf->packet_frag_offset != asf_st->frag_offset
652
             || (asf->packet_frag_offset
653
                 && asf->packet_seq != asf_st->seq)) // seq should be ignored
654
           ) {
655
            /* cannot continue current packet: free it */
656
            // FIXME better check if packet was already allocated
657
            av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
658
                   asf_st->pkt.size,
659
                   asf->packet_obj_size,
660
                   asf->packet_frag_offset, asf_st->frag_offset,
661
                   asf->packet_seq, asf_st->seq, asf->packet_frag_size);
662
            if (asf_st->pkt.size)
663
                av_free_packet(&asf_st->pkt);
664
            asf_st->frag_offset = 0;
665
            if (asf->packet_frag_offset != 0) {
666
                url_fskip(pb, asf->packet_frag_size);
667
                av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
668
                asf->packet_size_left -= asf->packet_frag_size;
669
                continue;
670
            }
671
        }
672
        if (asf->packet_replic_size == 1) {
673
            // frag_offset is here used as the begining timestamp
674
            asf->packet_frag_timestamp = asf->packet_time_start;
675
            asf->packet_time_start += asf->packet_time_delta;
676
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
677
            asf->packet_size_left--;
678 2141dc37 Zdenek Kabelac
            asf->packet_multi_size--;
679 bb270c08 Diego Biurrun
            if (asf->packet_multi_size < asf->packet_obj_size)
680
            {
681
                asf->packet_time_start = 0;
682
                url_fskip(pb, asf->packet_multi_size);
683
                asf->packet_size_left -= asf->packet_multi_size;
684 2141dc37 Zdenek Kabelac
                continue;
685 bb270c08 Diego Biurrun
            }
686
            asf->packet_multi_size -= asf->packet_obj_size;
687
            //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);
688
        }
689
        if (asf_st->frag_offset == 0) {
690
            /* new packet */
691
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
692
            asf_st->seq = asf->packet_seq;
693
            asf_st->pkt.pts = asf->packet_frag_timestamp;
694
            asf_st->pkt.stream_index = asf->stream_index;
695 115329f1 Diego Biurrun
            asf_st->pkt.pos =
696
            asf_st->packet_pos= asf->packet_pos;
697
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
698 82b9e4a2 Michael Niedermayer
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
699 01f4895c Michael Niedermayer
//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
700 bb270c08 Diego Biurrun
            if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
701
                asf->packet_key_frame = 1;
702
            if (asf->packet_key_frame)
703
                asf_st->pkt.flags |= PKT_FLAG_KEY;
704
        }
705
706
        /* read data */
707
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
708
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
709
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
710
        asf->packet_size_left -= asf->packet_frag_size;
711
        if (asf->packet_size_left < 0)
712 2141dc37 Zdenek Kabelac
            continue;
713 bb270c08 Diego Biurrun
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
714
                   asf->packet_frag_size);
715
        asf_st->frag_offset += asf->packet_frag_size;
716
        /* test if whole packet is read */
717
        if (asf_st->frag_offset == asf_st->pkt.size) {
718
            /* return packet */
719
            if (asf_st->ds_span > 1) {
720
                /* packet descrambling */
721 191e8ca7 Måns Rullgård
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
722 bb270c08 Diego Biurrun
                if (newdata) {
723
                    int offset = 0;
724
                    while (offset < asf_st->pkt.size) {
725
                        int off = offset / asf_st->ds_chunk_size;
726
                        int row = off / asf_st->ds_span;
727
                        int col = off % asf_st->ds_span;
728
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
729
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
730
                        memcpy(newdata + offset,
731
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
732
                               asf_st->ds_chunk_size);
733
                        offset += asf_st->ds_chunk_size;
734
                    }
735
                    av_free(asf_st->pkt.data);
736
                    asf_st->pkt.data = newdata;
737
                }
738
            }
739
            asf_st->frag_offset = 0;
740
            memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
741
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
742
            asf_st->pkt.size = 0;
743
            asf_st->pkt.data = 0;
744
            break; // packet completed
745
        }
746 de6d9b64 Fabrice Bellard
    }
747
    return 0;
748
}
749
750
static int asf_read_close(AVFormatContext *s)
751
{
752
    int i;
753
754
    for(i=0;i<s->nb_streams;i++) {
755 bb270c08 Diego Biurrun
        AVStream *st = s->streams[i];
756
        av_free(st->priv_data);
757 01f4895c Michael Niedermayer
    av_free(st->codec->palctrl);
758 de6d9b64 Fabrice Bellard
    }
759
    return 0;
760
}
761
762 38376f00 Kevin Kuphal
// Added to support seeking after packets have been read
763
// If information is not reset, read_packet fails due to
764
// leftover information from previous reads
765
static void asf_reset_header(AVFormatContext *s)
766
{
767
    ASFContext *asf = s->priv_data;
768 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
769
    int i;
770 38376f00 Kevin Kuphal
771
    asf->packet_nb_frames = 0;
772
    asf->packet_timestamp_start = -1;
773
    asf->packet_timestamp_end = -1;
774
    asf->packet_size_left = 0;
775
    asf->packet_segments = 0;
776
    asf->packet_flags = 0;
777
    asf->packet_property = 0;
778
    asf->packet_timestamp = 0;
779
    asf->packet_segsizetype = 0;
780
    asf->packet_segments = 0;
781
    asf->packet_seq = 0;
782
    asf->packet_replic_size = 0;
783
    asf->packet_key_frame = 0;
784
    asf->packet_padsize = 0;
785
    asf->packet_frag_offset = 0;
786
    asf->packet_frag_size = 0;
787
    asf->packet_frag_timestamp = 0;
788
    asf->packet_multi_size = 0;
789
    asf->packet_obj_size = 0;
790
    asf->packet_time_delta = 0;
791
    asf->packet_time_start = 0;
792 115329f1 Diego Biurrun
793 82b9e4a2 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
794
        asf_st= s->streams[i]->priv_data;
795
        av_free_packet(&asf_st->pkt);
796
        asf_st->frag_offset=0;
797
        asf_st->seq=0;
798
    }
799
    asf->asf_st= NULL;
800 38376f00 Kevin Kuphal
}
801
802 8d14a25c Michael Niedermayer
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
803 38376f00 Kevin Kuphal
{
804
    ASFContext *asf = s->priv_data;
805
    AVPacket pkt1, *pkt = &pkt1;
806 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
807 580fb5e7 Michael Niedermayer
    int64_t pts;
808 82b9e4a2 Michael Niedermayer
    int64_t pos= *ppos;
809 3e9245a9 Michael Niedermayer
    int i;
810
    int64_t start_pos[s->nb_streams];
811 115329f1 Diego Biurrun
812 3e9245a9 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
813
        start_pos[i]= pos;
814
    }
815 115329f1 Diego Biurrun
816 8d14a25c Michael Niedermayer
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
817
    *ppos= pos;
818
    url_fseek(&s->pb, pos, SEEK_SET);
819 115329f1 Diego Biurrun
820 82b9e4a2 Michael Niedermayer
//printf("asf_read_pts\n");
821
    asf_reset_header(s);
822 3e9245a9 Michael Niedermayer
    for(;;){
823 82b9e4a2 Michael Niedermayer
        if (av_read_frame(s, pkt) < 0){
824 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_INFO, "seek failed\n");
825 bb270c08 Diego Biurrun
            return AV_NOPTS_VALUE;
826 82b9e4a2 Michael Niedermayer
        }
827 115329f1 Diego Biurrun
828 38cf2a72 Michael Niedermayer
        pts= pkt->pts;
829 580fb5e7 Michael Niedermayer
830
        av_free_packet(pkt);
831 3e9245a9 Michael Niedermayer
        if(pkt->flags&PKT_FLAG_KEY){
832
            i= pkt->stream_index;
833
834
            asf_st= s->streams[i]->priv_data;
835
836
            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
837 8d14a25c Michael Niedermayer
            pos= asf_st->packet_pos;
838 09646bab Michael Niedermayer
839 52e54612 Michael Niedermayer
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
840 8d14a25c Michael Niedermayer
            start_pos[i]= asf_st->packet_pos + 1;
841 115329f1 Diego Biurrun
842 3e9245a9 Michael Niedermayer
            if(pkt->stream_index == stream_index)
843
               break;
844
        }
845
    }
846
847
    *ppos= pos;
848 82b9e4a2 Michael Niedermayer
//printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
849 580fb5e7 Michael Niedermayer
850
    return pts;
851 38376f00 Kevin Kuphal
}
852
853 56c96a22 Michael Niedermayer
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
854
{
855
    GUID g;
856
    ASFContext *asf = s->priv_data;
857
    int64_t gsize, itime;
858
    int64_t pos, current_pos, index_pts;
859
    int i;
860
    int pct,ict;
861
862
    current_pos = url_ftell(&s->pb);
863
864
    url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
865
    get_guid(&s->pb, &g);
866
    if (!memcmp(&g, &index_guid, sizeof(GUID))) {
867
        gsize = get_le64(&s->pb);
868
        get_guid(&s->pb, &g);
869
        itime=get_le64(&s->pb);
870
        pct=get_le32(&s->pb);
871
        ict=get_le32(&s->pb);
872 ccd3228e Dominik Mierzejewski
        av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
873 56c96a22 Michael Niedermayer
874
        for (i=0;i<ict;i++){
875
            int pktnum=get_le32(&s->pb);
876
            int pktct =get_le16(&s->pb);
877
            av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
878
879
            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
880
            index_pts=av_rescale(itime, i, 10000);
881
882
            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
883
        }
884 52e54612 Michael Niedermayer
        asf->index_read= 1;
885 56c96a22 Michael Niedermayer
    }
886
    url_fseek(&s->pb, current_pos, SEEK_SET);
887
}
888
889 3ba1438d Michael Niedermayer
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
890 2a10020b Zdenek Kabelac
{
891 afda223c Fabrice Bellard
    ASFContext *asf = s->priv_data;
892 56c96a22 Michael Niedermayer
    AVStream *st = s->streams[stream_index];
893
    int64_t pos;
894
    int index;
895 115329f1 Diego Biurrun
896 a602556e Michael Niedermayer
    if (asf->packet_size <= 0)
897 38376f00 Kevin Kuphal
        return -1;
898
899 52e54612 Michael Niedermayer
    if (!asf->index_read)
900 56c96a22 Michael Niedermayer
        asf_build_simple_index(s, stream_index);
901
902 52e54612 Michael Niedermayer
    if(!(asf->index_read && st->index_entries)){
903 56c96a22 Michael Niedermayer
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
904
            return -1;
905
    }else{
906
        index= av_index_search_timestamp(st, pts, flags);
907
        if(index<0)
908
            return -1;
909
910
        /* find the position */
911
        pos = st->index_entries[index].pos;
912
        pts = st->index_entries[index].timestamp;
913
914
    // various attempts to find key frame have failed so far
915
    //    asf_reset_header(s);
916
    //    url_fseek(&s->pb, pos, SEEK_SET);
917
    //    key_pos = pos;
918
    //     for(i=0;i<16;i++){
919
    //         pos = url_ftell(&s->pb);
920
    //         if (av_read_frame(s, &pkt) < 0){
921
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
922
    //             return -1;
923
    //         }
924
    //         asf_st = s->streams[stream_index]->priv_data;
925
    //         pos += st->parser->frame_offset;
926
    //
927
    //         if (pkt.size > b) {
928
    //             b = pkt.size;
929
    //             key_pos = pos;
930
    //         }
931
    //
932
    //         av_free_packet(&pkt);
933
    //     }
934
935
        /* do the seek */
936 ccd3228e Dominik Mierzejewski
        av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
937 56c96a22 Michael Niedermayer
        url_fseek(&s->pb, pos, SEEK_SET);
938
    }
939 38376f00 Kevin Kuphal
    asf_reset_header(s);
940
    return 0;
941 2a10020b Zdenek Kabelac
}
942
943 ff70e601 Måns Rullgård
AVInputFormat asf_demuxer = {
944 c9a65ca8 Fabrice Bellard
    "asf",
945
    "asf format",
946
    sizeof(ASFContext),
947
    asf_probe,
948
    asf_read_header,
949
    asf_read_packet,
950
    asf_read_close,
951 2a10020b Zdenek Kabelac
    asf_read_seek,
952 8d14a25c Michael Niedermayer
    asf_read_pts,
953 c9a65ca8 Fabrice Bellard
};