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ffmpeg / libavformat / asf.c @ 7be806f3

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1 de6d9b64 Fabrice Bellard
/*
2 542993b0 Konstantin Andreyev
 * ASF compatible decoder.
3 19720f15 Fabrice Bellard
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 19720f15 Fabrice Bellard
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9 de6d9b64 Fabrice Bellard
 *
10 19720f15 Fabrice Bellard
 * This library is distributed in the hope that it will be useful,
11 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14 de6d9b64 Fabrice Bellard
 *
15 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library; if not, write to the Free Software
17
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18 de6d9b64 Fabrice Bellard
 */
19
#include "avformat.h"
20
#include "avi.h"
21 f80c1ac0 Philip Gladstone
#include "mpegaudio.h"
22 542993b0 Konstantin Andreyev
#include "asf.h"
23 de6d9b64 Fabrice Bellard
24 580fb5e7 Michael Niedermayer
#undef NDEBUG
25
#include <assert.h>
26
27 615b92fd Konstantin Andreyev
#define FRAME_HEADER_SIZE 17
28
// Fix Me! FRAME_HEADER_SIZE may be different. 
29
30 de6d9b64 Fabrice Bellard
static const GUID index_guid = {
31
    0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
32
};
33
34
/**********************************/
35
/* decoding */
36
37
//#define DEBUG
38
39
#ifdef DEBUG
40 5082f759 François Revol
#define PRINT_IF_GUID(g,cmp) \
41
if (!memcmp(g, &cmp, sizeof(GUID))) \
42
    printf("(GUID: %s) ", #cmp)
43
44 de6d9b64 Fabrice Bellard
static void print_guid(const GUID *g)
45
{
46
    int i;
47 5082f759 François Revol
    PRINT_IF_GUID(g, asf_header);
48
    else PRINT_IF_GUID(g, file_header);
49
    else PRINT_IF_GUID(g, stream_header);
50
    else PRINT_IF_GUID(g, audio_stream);
51
    else PRINT_IF_GUID(g, audio_conceal_none);
52
    else PRINT_IF_GUID(g, video_stream);
53
    else PRINT_IF_GUID(g, video_conceal_none);
54
    else PRINT_IF_GUID(g, comment_header);
55
    else PRINT_IF_GUID(g, codec_comment_header);
56
    else PRINT_IF_GUID(g, codec_comment1_header);
57
    else PRINT_IF_GUID(g, data_header);
58
    else PRINT_IF_GUID(g, index_guid);
59
    else PRINT_IF_GUID(g, head1_guid);
60
    else PRINT_IF_GUID(g, head2_guid);
61
    else PRINT_IF_GUID(g, my_guid);
62
    else
63
        printf("(GUID: unknown) ");
64 de6d9b64 Fabrice Bellard
    printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
65 2a10020b Zdenek Kabelac
    for(i=0;i<8;i++)
66 de6d9b64 Fabrice Bellard
        printf(" 0x%02x,", g->v4[i]);
67
    printf("}\n");
68
}
69 5082f759 François Revol
#undef PRINT_IF_GUID(g,cmp)
70 de6d9b64 Fabrice Bellard
#endif
71
72
static void get_guid(ByteIOContext *s, GUID *g)
73
{
74
    int i;
75
76
    g->v1 = get_le32(s);
77
    g->v2 = get_le16(s);
78
    g->v3 = get_le16(s);
79
    for(i=0;i<8;i++)
80
        g->v4[i] = get_byte(s);
81
}
82
83
#if 0
84
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
85
{
86
    int len, c;
87
    char *q;
88

89
    len = get_le16(pb);
90
    q = buf;
91
    while (len > 0) {
92
        c = get_le16(pb);
93
        if ((q - buf) < buf_size - 1)
94
            *q++ = c;
95
        len--;
96
    }
97
    *q = '\0';
98
}
99
#endif
100
101
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
102
{
103
    int c;
104
    char *q;
105
106
    q = buf;
107
    while (len > 0) {
108
        c = get_le16(pb);
109
        if ((q - buf) < buf_size - 1)
110
            *q++ = c;
111
        len-=2;
112
    }
113
    *q = '\0';
114
}
115
116 c9a65ca8 Fabrice Bellard
static int asf_probe(AVProbeData *pd)
117
{
118
    GUID g;
119
    const unsigned char *p;
120
    int i;
121
122
    /* check file header */
123
    if (pd->buf_size <= 32)
124
        return 0;
125
    p = pd->buf;
126
    g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
127
    p += 4;
128
    g.v2 = p[0] | (p[1] << 8);
129
    p += 2;
130
    g.v3 = p[0] | (p[1] << 8);
131
    p += 2;
132
    for(i=0;i<8;i++)
133
        g.v4[i] = *p++;
134
135
    if (!memcmp(&g, &asf_header, sizeof(GUID)))
136
        return AVPROBE_SCORE_MAX;
137
    else
138
        return 0;
139
}
140
141 de6d9b64 Fabrice Bellard
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
142
{
143 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
144 de6d9b64 Fabrice Bellard
    GUID g;
145
    ByteIOContext *pb = &s->pb;
146
    AVStream *st;
147
    ASFStream *asf_st;
148 e095026a Fabrice Bellard
    int size, i;
149 0c1a9eda Zdenek Kabelac
    int64_t gsize;
150 de6d9b64 Fabrice Bellard
151
    get_guid(pb, &g);
152
    if (memcmp(&g, &asf_header, sizeof(GUID)))
153
        goto fail;
154
    get_le64(pb);
155
    get_le32(pb);
156
    get_byte(pb);
157
    get_byte(pb);
158 2141dc37 Zdenek Kabelac
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
159 de6d9b64 Fabrice Bellard
    for(;;) {
160
        get_guid(pb, &g);
161
        gsize = get_le64(pb);
162
#ifdef DEBUG
163
        printf("%08Lx: ", url_ftell(pb) - 24);
164
        print_guid(&g);
165
        printf("  size=0x%Lx\n", gsize);
166
#endif
167
        if (gsize < 24)
168
            goto fail;
169
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
170 2a10020b Zdenek Kabelac
            get_guid(pb, &asf->hdr.guid);
171
            asf->hdr.file_size                = get_le64(pb);
172
            asf->hdr.create_time        = get_le64(pb);
173
            asf->hdr.packets_count        = get_le64(pb);
174
            asf->hdr.play_time                = get_le64(pb);
175
            asf->hdr.send_time                = get_le64(pb);
176
            asf->hdr.preroll                = get_le32(pb);
177
            asf->hdr.ignore                = get_le32(pb);
178
            asf->hdr.flags                = get_le32(pb);
179
            asf->hdr.min_pktsize        = get_le32(pb);
180
            asf->hdr.max_pktsize        = get_le32(pb);
181
            asf->hdr.max_bitrate        = get_le32(pb);
182 2141dc37 Zdenek Kabelac
            asf->packet_size = asf->hdr.max_pktsize;
183
            asf->nb_packets = asf->hdr.packets_count;
184 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
185 2e7973bb Roman Shaposhnik
            int type, total_size, type_specific_size;
186 de6d9b64 Fabrice Bellard
            unsigned int tag1;
187 0c1a9eda Zdenek Kabelac
            int64_t pos1, pos2;
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 6c55fd79 Michael Niedermayer
            st->start_time = asf->hdr.preroll * (int64_t)AV_TIME_BASE / 1000;
200
            st->duration = asf->hdr.send_time / 
201
                (10000000 / AV_TIME_BASE) - st->start_time;
202 de6d9b64 Fabrice Bellard
            get_guid(pb, &g);
203
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
204
                type = CODEC_TYPE_AUDIO;
205
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
206
                type = CODEC_TYPE_VIDEO;
207
            } else {
208
                goto fail;
209
            }
210
            get_guid(pb, &g);
211
            total_size = get_le64(pb);
212 2e7973bb Roman Shaposhnik
            type_specific_size = get_le32(pb);
213 de6d9b64 Fabrice Bellard
            get_le32(pb);
214 2a10020b Zdenek Kabelac
            st->id = get_le16(pb) & 0x7f; /* stream id */
215
            // mapping of asf ID to AV stream ID;
216 247eadca Fabrice Bellard
            asf->asfid2avid[st->id] = s->nb_streams - 1;
217 2a10020b Zdenek Kabelac
218 de6d9b64 Fabrice Bellard
            get_le32(pb);
219 2141dc37 Zdenek Kabelac
            st->codec.codec_type = type;
220 afda223c Fabrice Bellard
            /* 1 fps default (XXX: put 0 fps instead) */
221 6260de6a Michael Niedermayer
            st->codec.frame_rate = 1000; 
222 afda223c Fabrice Bellard
            st->codec.frame_rate_base = 1;
223 de6d9b64 Fabrice Bellard
            if (type == CODEC_TYPE_AUDIO) {
224 2e7973bb Roman Shaposhnik
                get_wav_header(pb, &st->codec, type_specific_size);
225 afda223c Fabrice Bellard
                st->need_parsing = 1;
226 2a10020b Zdenek Kabelac
                /* We have to init the frame size at some point .... */
227
                pos2 = url_ftell(pb);
228 2141dc37 Zdenek Kabelac
                if (gsize > (pos2 + 8 - pos1 + 24)) {
229 2a10020b Zdenek Kabelac
                    asf_st->ds_span = get_byte(pb);
230
                    asf_st->ds_packet_size = get_le16(pb);
231
                    asf_st->ds_chunk_size = get_le16(pb);
232
                    asf_st->ds_data_size = get_le16(pb);
233
                    asf_st->ds_silence_data = get_byte(pb);
234
                }
235
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
236
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
237
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
238 2141dc37 Zdenek Kabelac
                if (asf_st->ds_span > 1) {
239 2a10020b Zdenek Kabelac
                    if (!asf_st->ds_chunk_size
240
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
241
                        asf_st->ds_span = 0; // disable descrambling
242
                }
243 f80c1ac0 Philip Gladstone
                switch (st->codec.codec_id) {
244 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
245 f80c1ac0 Philip Gladstone
                    st->codec.frame_size = MPA_FRAME_SIZE;
246
                    break;
247
                case CODEC_ID_PCM_S16LE:
248
                case CODEC_ID_PCM_S16BE:
249
                case CODEC_ID_PCM_U16LE:
250
                case CODEC_ID_PCM_U16BE:
251
                case CODEC_ID_PCM_S8:
252
                case CODEC_ID_PCM_U8:
253
                case CODEC_ID_PCM_ALAW:
254
                case CODEC_ID_PCM_MULAW:
255
                    st->codec.frame_size = 1;
256
                    break;
257
                default:
258
                    /* This is probably wrong, but it prevents a crash later */
259
                    st->codec.frame_size = 1;
260
                    break;
261
                }
262 de6d9b64 Fabrice Bellard
            } else {
263 2141dc37 Zdenek Kabelac
                get_le32(pb);
264 de6d9b64 Fabrice Bellard
                get_le32(pb);
265
                get_byte(pb);
266
                size = get_le16(pb); /* size */
267
                get_le32(pb); /* size */
268
                st->codec.width = get_le32(pb);
269 2a10020b Zdenek Kabelac
                st->codec.height = get_le32(pb);
270
                /* not available for asf */
271 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
272 693feac5 Zdenek Kabelac
                st->codec.bits_per_sample = get_le16(pb); /* depth */
273 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
274 2141dc37 Zdenek Kabelac
                url_fskip(pb, 20);
275
                if (size > 40) {
276 e40fed0b Zdenek Kabelac
                    st->codec.extradata_size = size - 40;
277 3129cd01 Michael Niedermayer
                    st->codec.extradata = av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
278 e40fed0b Zdenek Kabelac
                    get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
279 2141dc37 Zdenek Kabelac
                }
280 5e29abf8 Roberto Togni
281
        /* Extract palette from extradata if bpp <= 8 */
282
        /* This code assumes that extradata contains only palette */
283
        /* This is true for all paletted codecs implemented in ffmpeg */
284
        if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) {
285
            st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl));
286
#ifdef WORDS_BIGENDIAN
287 19d053c5 Roman Shaposhnik
            for (i = 0; i < FFMIN(st->codec.extradata_size, AVPALETTE_SIZE)/4; i++)
288
                st->codec.palctrl->palette[i] = bswap_32(((uint32_t*)st->codec.extradata)[i]);
289 5e29abf8 Roberto Togni
#else
290
            memcpy(st->codec.palctrl->palette, st->codec.extradata,
291
                   FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
292
#endif
293
            st->codec.palctrl->palette_changed = 1;
294
        }
295
296 7004ffb3 Michael Niedermayer
                st->codec.codec_tag = tag1;
297 17a241dd Fabrice Bellard
                st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
298 afbb5ce4 Michael Niedermayer
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
299
                    st->need_parsing = 1;
300 de6d9b64 Fabrice Bellard
            }
301
            pos2 = url_ftell(pb);
302
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
303
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
304
            break;
305
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
306
            int len1, len2, len3, len4, len5;
307
308
            len1 = get_le16(pb);
309
            len2 = get_le16(pb);
310
            len3 = get_le16(pb);
311
            len4 = get_le16(pb);
312
            len5 = get_le16(pb);
313
            get_str16_nolen(pb, len1, s->title, sizeof(s->title));
314
            get_str16_nolen(pb, len2, s->author, sizeof(s->author));
315
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
316
            get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
317 2141dc37 Zdenek Kabelac
            url_fskip(pb, len5);
318 d13431cd Kevin Kuphal
       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
319
                int desc_count, i;
320
321
                desc_count = get_le16(pb);
322
                for(i=0;i<desc_count;i++)
323
                {
324
                        int name_len,value_type,value_len,value_num = 0;
325
                        char *name, *value;
326
327
                        name_len = get_le16(pb);
328
                        name = (char *)av_mallocz(name_len);
329
                        get_str16_nolen(pb, name_len, name, name_len);
330
                        value_type = get_le16(pb);
331
                        value_len = get_le16(pb);
332
                        if ((value_type == 0) || (value_type == 1)) // unicode or byte
333
                        {
334
                                value = (char *)av_mallocz(value_len);
335
                                get_str16_nolen(pb, value_len, value, value_len);
336 0ecca7a4 Michael Niedermayer
                                if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
337 d13431cd Kevin Kuphal
                                av_free(value);
338
                        }
339
                        if ((value_type >= 2) || (value_type <= 5)) // boolean or DWORD or QWORD or WORD
340
                        {
341
                                if (value_type==2) value_num = get_le32(pb);
342
                                if (value_type==3) value_num = get_le32(pb);
343
                                if (value_type==4) value_num = get_le64(pb);
344
                                if (value_type==5) value_num = get_le16(pb);
345
                                if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
346
                                if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
347
                        }
348
                        av_free(name);
349
                }
350 de6d9b64 Fabrice Bellard
#if 0
351
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
352
            int v1, v2;
353
            get_guid(pb, &g);
354
            v1 = get_le32(pb);
355
            v2 = get_le16(pb);
356
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
357
            int len, v1, n, num;
358
            char str[256], *q;
359
            char tag[16];
360

361
            get_guid(pb, &g);
362
            print_guid(&g);
363 2a10020b Zdenek Kabelac

364 de6d9b64 Fabrice Bellard
            n = get_le32(pb);
365
            for(i=0;i<n;i++) {
366
                num = get_le16(pb); /* stream number */
367
                get_str16(pb, str, sizeof(str));
368
                get_str16(pb, str, sizeof(str));
369
                len = get_le16(pb);
370
                q = tag;
371
                while (len > 0) {
372
                    v1 = get_byte(pb);
373
                    if ((q - tag) < sizeof(tag) - 1)
374
                        *q++ = v1;
375
                    len--;
376
                }
377
                *q = '\0';
378
            }
379
#endif
380
        } else if (url_feof(pb)) {
381
            goto fail;
382
        } else {
383
            url_fseek(pb, gsize - 24, SEEK_CUR);
384
        }
385
    }
386
    get_guid(pb, &g);
387
    get_le64(pb);
388
    get_byte(pb);
389
    get_byte(pb);
390 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
391
        goto fail;
392
    asf->data_offset = url_ftell(pb);
393 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
394
395
    return 0;
396
397
 fail:
398 4c3dff6d Zdenek Kabelac
     for(i=0;i<s->nb_streams;i++) {
399 de6d9b64 Fabrice Bellard
        AVStream *st = s->streams[i];
400 4c3dff6d Zdenek Kabelac
        if (st) {
401 2141dc37 Zdenek Kabelac
            av_free(st->priv_data);
402 4c3dff6d Zdenek Kabelac
            av_free(st->codec.extradata);
403
        }
404 1ea4f593 Fabrice Bellard
        av_free(st);
405 de6d9b64 Fabrice Bellard
    }
406
    return -1;
407
}
408
409 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
410
    switch (bits & 3) \
411
    { \
412
    case 3: var = get_le32(pb); rsize += 4; break; \
413
    case 2: var = get_le16(pb); rsize += 2; break; \
414
    case 1: var = get_byte(pb); rsize++; break; \
415
    default: var = defval; break; \
416
    }
417
418 de6d9b64 Fabrice Bellard
static int asf_get_packet(AVFormatContext *s)
419
{
420
    ASFContext *asf = s->priv_data;
421
    ByteIOContext *pb = &s->pb;
422 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
423 29962fea Michael Niedermayer
    int rsize = 9;
424
    int c;
425
    
426 8d14a25c Michael Niedermayer
    if((url_ftell(&s->pb) - s->data_offset) % asf->packet_size)
427
        return -1;
428 29962fea Michael Niedermayer
    assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
429
    
430
    c = get_byte(pb);
431 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
432 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
433 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
434 2a10020b Zdenek Kabelac
    }
435
    if ((c & 0x0f) == 2) { // always true for now
436 1359c2d4 Zdenek Kabelac
        if (get_le16(pb) != 0) {
437 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
438 bc874dae Michel Bardiaux
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
439 0bd586c5 Mike Melanson
            return AVERROR_IO;
440 2a10020b Zdenek Kabelac
        }
441 29962fea Michael Niedermayer
        rsize+=2;
442
/*    }else{
443
        if (!url_feof(pb))
444
            printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
445 0bd586c5 Mike Melanson
        return AVERROR_IO;*/
446 de6d9b64 Fabrice Bellard
    }
447 2a10020b Zdenek Kabelac
448
    asf->packet_flags = get_byte(pb);
449
    asf->packet_property = get_byte(pb);
450
451
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
452
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
453
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
454
455
    asf->packet_timestamp = get_le32(pb);
456 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
457 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
458 2a10020b Zdenek Kabelac
459
    if (asf->packet_flags & 0x01) {
460
        asf->packet_segsizetype = get_byte(pb); rsize++;
461
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
462
    } else {
463
        asf->packet_segments = 1;
464
        asf->packet_segsizetype = 0x80;
465
    }
466
    asf->packet_size_left = packet_length - padsize - rsize;
467 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
468
        padsize += asf->hdr.min_pktsize - packet_length;
469 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
470 de6d9b64 Fabrice Bellard
#ifdef DEBUG
471 2a10020b Zdenek Kabelac
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
472 de6d9b64 Fabrice Bellard
#endif
473
    return 0;
474
}
475
476
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
477
{
478
    ASFContext *asf = s->priv_data;
479 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
480 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
481 1359c2d4 Zdenek Kabelac
    //static int pc = 0;
482 2a10020b Zdenek Kabelac
    for (;;) {
483
        int rsize = 0;
484 2141dc37 Zdenek Kabelac
        if (asf->packet_size_left < FRAME_HEADER_SIZE
485 1359c2d4 Zdenek Kabelac
            || asf->packet_segments < 1) {
486 2a10020b Zdenek Kabelac
            //asf->packet_size_left <= asf->packet_padsize) {
487 1359c2d4 Zdenek Kabelac
            int ret = asf->packet_size_left + asf->packet_padsize;
488
            //printf("PacketLeftSize:%d  Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
489
            /* fail safe */
490
            url_fskip(pb, ret);
491 82b9e4a2 Michael Niedermayer
            asf->packet_pos= url_ftell(&s->pb);
492 2a10020b Zdenek Kabelac
            ret = asf_get_packet(s);
493
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
494 5acdd6e6 Zdenek Kabelac
            if (ret < 0 || url_feof(pb))
495 0bd586c5 Mike Melanson
                return AVERROR_IO;
496 2141dc37 Zdenek Kabelac
            asf->packet_time_start = 0;
497 2a10020b Zdenek Kabelac
            continue;
498
        }
499 2141dc37 Zdenek Kabelac
        if (asf->packet_time_start == 0) {
500 2a10020b Zdenek Kabelac
            /* read frame header */
501 1359c2d4 Zdenek Kabelac
            int num = get_byte(pb);
502
            asf->packet_segments--;
503 2a10020b Zdenek Kabelac
            rsize++;
504
            asf->packet_key_frame = (num & 0x80) >> 7;
505
            asf->stream_index = asf->asfid2avid[num & 0x7f];
506
            // sequence should be ignored!
507
            DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
508
            DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
509
            DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
510 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);
511 2a10020b Zdenek Kabelac
            if (asf->packet_replic_size > 1) {
512 1305a9d5 Michael Niedermayer
                assert(asf->packet_replic_size >= 8);
513 2a10020b Zdenek Kabelac
                // it should be always at least 8 bytes - FIXME validate
514
                asf->packet_obj_size = get_le32(pb);
515
                asf->packet_frag_timestamp = get_le32(pb); // timestamp
516 acbe6cfa Zdenek Kabelac
                if (asf->packet_replic_size > 8)
517
                    url_fskip(pb, asf->packet_replic_size - 8);
518 2a10020b Zdenek Kabelac
                rsize += asf->packet_replic_size; // FIXME - check validity
519 1305a9d5 Michael Niedermayer
            } else if (asf->packet_replic_size==1){
520 acbe6cfa Zdenek Kabelac
                // multipacket - frag_offset is begining timestamp
521 2a10020b Zdenek Kabelac
                asf->packet_time_start = asf->packet_frag_offset;
522
                asf->packet_frag_offset = 0;
523
                asf->packet_frag_timestamp = asf->packet_timestamp;
524 2141dc37 Zdenek Kabelac
525 1305a9d5 Michael Niedermayer
                asf->packet_time_delta = get_byte(pb);
526
                rsize++;
527
            }else{
528
                assert(asf->packet_replic_size==0);
529
            }
530 2a10020b Zdenek Kabelac
            if (asf->packet_flags & 0x01) {
531
                DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
532 acbe6cfa Zdenek Kabelac
#undef DO_2BITS
533 2a10020b Zdenek Kabelac
                //printf("Fragsize %d\n", asf->packet_frag_size);
534
            } else {
535
                asf->packet_frag_size = asf->packet_size_left - rsize;
536
                //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
537
            }
538 1359c2d4 Zdenek Kabelac
            if (asf->packet_replic_size == 1) {
539 2141dc37 Zdenek Kabelac
                asf->packet_multi_size = asf->packet_frag_size;
540 1359c2d4 Zdenek Kabelac
                if (asf->packet_multi_size > asf->packet_size_left) {
541 2141dc37 Zdenek Kabelac
                    asf->packet_segments = 0;
542
                    continue;
543
                }
544
            }
545 2a10020b Zdenek Kabelac
            asf->packet_size_left -= rsize;
546
            //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
547 1359c2d4 Zdenek Kabelac
548 b9866ebc Michael Niedermayer
            if (asf->stream_index < 0 || s->streams[asf->stream_index]->discard) {
549 1359c2d4 Zdenek Kabelac
                asf->packet_time_start = 0;
550
                /* unhandled packet (should not happen) */
551
                url_fskip(pb, asf->packet_frag_size);
552
                asf->packet_size_left -= asf->packet_frag_size;
553 b9866ebc Michael Niedermayer
                if(asf->stream_index < 0)
554
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d  %d\n", asf->packet_frag_size, num & 0x7f);
555 1359c2d4 Zdenek Kabelac
                continue;
556
            }
557
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
558 2a10020b Zdenek Kabelac
        }
559
        asf_st = asf->asf_st;
560
561
        if ((asf->packet_frag_offset != asf_st->frag_offset
562
             || (asf->packet_frag_offset
563
                 && asf->packet_seq != asf_st->seq)) // seq should be ignored
564
           ) {
565
            /* cannot continue current packet: free it */
566
            // FIXME better check if packet was already allocated
567 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
568 2a10020b Zdenek Kabelac
                   asf_st->pkt.size,
569 2141dc37 Zdenek Kabelac
                   asf->packet_obj_size,
570 2a10020b Zdenek Kabelac
                   asf->packet_frag_offset, asf_st->frag_offset,
571
                   asf->packet_seq, asf_st->seq, asf->packet_frag_size);
572 2141dc37 Zdenek Kabelac
            if (asf_st->pkt.size)
573 2a10020b Zdenek Kabelac
                av_free_packet(&asf_st->pkt);
574
            asf_st->frag_offset = 0;
575
            if (asf->packet_frag_offset != 0) {
576
                url_fskip(pb, asf->packet_frag_size);
577 bc874dae Michel Bardiaux
                av_log(s, AV_LOG_INFO, "ff asf parser skiping %db\n", asf->packet_frag_size);
578 2141dc37 Zdenek Kabelac
                asf->packet_size_left -= asf->packet_frag_size;
579 2a10020b Zdenek Kabelac
                continue;
580
            }
581
        }
582 2141dc37 Zdenek Kabelac
        if (asf->packet_replic_size == 1) {
583
            // frag_offset is here used as the begining timestamp
584 2a10020b Zdenek Kabelac
            asf->packet_frag_timestamp = asf->packet_time_start;
585 2141dc37 Zdenek Kabelac
            asf->packet_time_start += asf->packet_time_delta;
586 2a10020b Zdenek Kabelac
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
587 2141dc37 Zdenek Kabelac
            asf->packet_size_left--;
588
            asf->packet_multi_size--;
589
            if (asf->packet_multi_size < asf->packet_obj_size)
590
            {
591
                asf->packet_time_start = 0;
592
                url_fskip(pb, asf->packet_multi_size);
593
                asf->packet_size_left -= asf->packet_multi_size;
594
                continue;
595
            }
596
            asf->packet_multi_size -= asf->packet_obj_size;
597
            //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);
598 2a10020b Zdenek Kabelac
        }
599
        if (asf_st->frag_offset == 0) {
600
            /* new packet */
601
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
602
            asf_st->seq = asf->packet_seq;
603 6c55fd79 Michael Niedermayer
            asf_st->pkt.pts = asf->packet_frag_timestamp;
604 2a10020b Zdenek Kabelac
            asf_st->pkt.stream_index = asf->stream_index;
605 1305a9d5 Michael Niedermayer
            asf_st->packet_pos= asf->packet_pos;            
606
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", 
607 82b9e4a2 Michael Niedermayer
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
608 1305a9d5 Michael Niedermayer
//s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
609 38376f00 Kevin Kuphal
            if (s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO) 
610
                asf->packet_key_frame = 1;
611 2a10020b Zdenek Kabelac
            if (asf->packet_key_frame)
612
                asf_st->pkt.flags |= PKT_FLAG_KEY;
613
        }
614
615
        /* read data */
616
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
617
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
618
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
619 2141dc37 Zdenek Kabelac
        asf->packet_size_left -= asf->packet_frag_size;
620
        if (asf->packet_size_left < 0)
621
            continue;
622 2a10020b Zdenek Kabelac
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
623
                   asf->packet_frag_size);
624
        asf_st->frag_offset += asf->packet_frag_size;
625
        /* test if whole packet is read */
626
        if (asf_st->frag_offset == asf_st->pkt.size) {
627
            /* return packet */
628
            if (asf_st->ds_span > 1) {
629 2141dc37 Zdenek Kabelac
                /* packet descrambling */
630 2a10020b Zdenek Kabelac
                char* newdata = av_malloc(asf_st->pkt.size);
631
                if (newdata) {
632
                    int offset = 0;
633
                    while (offset < asf_st->pkt.size) {
634
                        int off = offset / asf_st->ds_chunk_size;
635
                        int row = off / asf_st->ds_span;
636
                        int col = off % asf_st->ds_span;
637
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
638
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
639
                        memcpy(newdata + offset,
640
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
641
                               asf_st->ds_chunk_size);
642
                        offset += asf_st->ds_chunk_size;
643
                    }
644
                    av_free(asf_st->pkt.data);
645
                    asf_st->pkt.data = newdata;
646
                }
647
            }
648
            asf_st->frag_offset = 0;
649
            memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
650
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
651
            asf_st->pkt.size = 0;
652
            asf_st->pkt.data = 0;
653
            break; // packet completed
654
        }
655 de6d9b64 Fabrice Bellard
    }
656
    return 0;
657
}
658
659
static int asf_read_close(AVFormatContext *s)
660
{
661
    int i;
662
663
    for(i=0;i<s->nb_streams;i++) {
664 4c3dff6d Zdenek Kabelac
        AVStream *st = s->streams[i];
665
        av_free(st->priv_data);
666
        av_free(st->codec.extradata);
667 5e29abf8 Roberto Togni
    av_free(st->codec.palctrl);
668 de6d9b64 Fabrice Bellard
    }
669
    return 0;
670
}
671
672 38376f00 Kevin Kuphal
// Added to support seeking after packets have been read
673
// If information is not reset, read_packet fails due to
674
// leftover information from previous reads
675
static void asf_reset_header(AVFormatContext *s)
676
{
677
    ASFContext *asf = s->priv_data;
678 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
679
    int i;
680 38376f00 Kevin Kuphal
681
    asf->packet_nb_frames = 0;
682
    asf->packet_timestamp_start = -1;
683
    asf->packet_timestamp_end = -1;
684
    asf->packet_size_left = 0;
685
    asf->packet_segments = 0;
686
    asf->packet_flags = 0;
687
    asf->packet_property = 0;
688
    asf->packet_timestamp = 0;
689
    asf->packet_segsizetype = 0;
690
    asf->packet_segments = 0;
691
    asf->packet_seq = 0;
692
    asf->packet_replic_size = 0;
693
    asf->packet_key_frame = 0;
694
    asf->packet_padsize = 0;
695
    asf->packet_frag_offset = 0;
696
    asf->packet_frag_size = 0;
697
    asf->packet_frag_timestamp = 0;
698
    asf->packet_multi_size = 0;
699
    asf->packet_obj_size = 0;
700
    asf->packet_time_delta = 0;
701
    asf->packet_time_start = 0;
702 82b9e4a2 Michael Niedermayer
    
703
    for(i=0; i<s->nb_streams; i++){
704
        asf_st= s->streams[i]->priv_data;
705
        av_free_packet(&asf_st->pkt);
706
        asf_st->frag_offset=0;
707
        asf_st->seq=0;
708
    }
709
    asf->asf_st= NULL;
710 38376f00 Kevin Kuphal
}
711
712 8d14a25c Michael Niedermayer
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
713 38376f00 Kevin Kuphal
{
714
    ASFContext *asf = s->priv_data;
715
    AVPacket pkt1, *pkt = &pkt1;
716 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
717 580fb5e7 Michael Niedermayer
    int64_t pts;
718 82b9e4a2 Michael Niedermayer
    int64_t pos= *ppos;
719 3e9245a9 Michael Niedermayer
    int i;
720
    int64_t start_pos[s->nb_streams];
721
    
722
    for(i=0; i<s->nb_streams; i++){
723
        start_pos[i]= pos;
724
    }
725 8d14a25c Michael Niedermayer
    
726
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
727
    *ppos= pos;
728
    url_fseek(&s->pb, pos, SEEK_SET);
729
    
730 82b9e4a2 Michael Niedermayer
//printf("asf_read_pts\n");
731
    asf_reset_header(s);
732 3e9245a9 Michael Niedermayer
    for(;;){
733 82b9e4a2 Michael Niedermayer
        if (av_read_frame(s, pkt) < 0){
734 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_INFO, "seek failed\n");
735 580fb5e7 Michael Niedermayer
                return AV_NOPTS_VALUE;
736 82b9e4a2 Michael Niedermayer
        }
737 8d14a25c Michael Niedermayer
        
738 cdd5034f Michael Niedermayer
        pts= pkt->pts * 1000 / AV_TIME_BASE;
739 580fb5e7 Michael Niedermayer
740
        av_free_packet(pkt);
741 3e9245a9 Michael Niedermayer
        if(pkt->flags&PKT_FLAG_KEY){
742
            i= pkt->stream_index;
743
744
            asf_st= s->streams[i]->priv_data;
745
746
            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
747 8d14a25c Michael Niedermayer
            pos= asf_st->packet_pos;
748 09646bab Michael Niedermayer
749 3e9245a9 Michael Niedermayer
            av_add_index_entry(s->streams[i], pos, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
750 8d14a25c Michael Niedermayer
            start_pos[i]= asf_st->packet_pos + 1;
751 3e9245a9 Michael Niedermayer
            
752
            if(pkt->stream_index == stream_index)
753
               break;
754
        }
755
    }
756
757
    *ppos= pos;
758 82b9e4a2 Michael Niedermayer
//printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
759 580fb5e7 Michael Niedermayer
760
    return pts;
761 38376f00 Kevin Kuphal
}
762
763 3ba1438d Michael Niedermayer
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
764 2a10020b Zdenek Kabelac
{
765 afda223c Fabrice Bellard
    ASFContext *asf = s->priv_data;
766 580fb5e7 Michael Niedermayer
    
767 a602556e Michael Niedermayer
    if (asf->packet_size <= 0)
768 38376f00 Kevin Kuphal
        return -1;
769
770 3ba1438d Michael Niedermayer
    if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
771 8d14a25c Michael Niedermayer
        return -1;
772 3e9245a9 Michael Niedermayer
773 38376f00 Kevin Kuphal
    asf_reset_header(s);
774
    return 0;
775 2a10020b Zdenek Kabelac
}
776
777 0570bf06 Zdenek Kabelac
static AVInputFormat asf_iformat = {
778 c9a65ca8 Fabrice Bellard
    "asf",
779
    "asf format",
780
    sizeof(ASFContext),
781
    asf_probe,
782
    asf_read_header,
783
    asf_read_packet,
784
    asf_read_close,
785 2a10020b Zdenek Kabelac
    asf_read_seek,
786 8d14a25c Michael Niedermayer
    asf_read_pts,
787 c9a65ca8 Fabrice Bellard
};
788
789 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
790 542993b0 Konstantin Andreyev
    extern AVOutputFormat asf_oformat;
791
    extern AVOutputFormat asf_stream_oformat;
792 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
793 8b3c13f9 Philip Gladstone
794 c9a65ca8 Fabrice Bellard
int asf_init(void)
795
{
796
    av_register_input_format(&asf_iformat);
797 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
798 c9a65ca8 Fabrice Bellard
    av_register_output_format(&asf_oformat);
799 8b3c13f9 Philip Gladstone
    av_register_output_format(&asf_stream_oformat);
800 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
801 c9a65ca8 Fabrice Bellard
    return 0;
802
}