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ffmpeg / libavformat / asf.c @ 34f633df

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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 0ffd77b9 Michael Niedermayer
            int type, total_size, type_specific_size, sizeX;
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 c0df9d75 Michael Niedermayer
            st->start_time = asf->hdr.preroll;
200 6c55fd79 Michael Niedermayer
            st->duration = asf->hdr.send_time / 
201 c0df9d75 Michael Niedermayer
                (10000000 / 1000) - 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 de6d9b64 Fabrice Bellard
            if (type == CODEC_TYPE_AUDIO) {
221 2e7973bb Roman Shaposhnik
                get_wav_header(pb, &st->codec, type_specific_size);
222 afda223c Fabrice Bellard
                st->need_parsing = 1;
223 2a10020b Zdenek Kabelac
                /* We have to init the frame size at some point .... */
224
                pos2 = url_ftell(pb);
225 2141dc37 Zdenek Kabelac
                if (gsize > (pos2 + 8 - pos1 + 24)) {
226 2a10020b Zdenek Kabelac
                    asf_st->ds_span = get_byte(pb);
227
                    asf_st->ds_packet_size = get_le16(pb);
228
                    asf_st->ds_chunk_size = get_le16(pb);
229
                    asf_st->ds_data_size = get_le16(pb);
230
                    asf_st->ds_silence_data = get_byte(pb);
231
                }
232
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
233
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
234
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
235 2141dc37 Zdenek Kabelac
                if (asf_st->ds_span > 1) {
236 2a10020b Zdenek Kabelac
                    if (!asf_st->ds_chunk_size
237
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
238
                        asf_st->ds_span = 0; // disable descrambling
239
                }
240 f80c1ac0 Philip Gladstone
                switch (st->codec.codec_id) {
241 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
242 f80c1ac0 Philip Gladstone
                    st->codec.frame_size = MPA_FRAME_SIZE;
243
                    break;
244
                case CODEC_ID_PCM_S16LE:
245
                case CODEC_ID_PCM_S16BE:
246
                case CODEC_ID_PCM_U16LE:
247
                case CODEC_ID_PCM_U16BE:
248
                case CODEC_ID_PCM_S8:
249
                case CODEC_ID_PCM_U8:
250
                case CODEC_ID_PCM_ALAW:
251
                case CODEC_ID_PCM_MULAW:
252
                    st->codec.frame_size = 1;
253
                    break;
254
                default:
255
                    /* This is probably wrong, but it prevents a crash later */
256
                    st->codec.frame_size = 1;
257
                    break;
258
                }
259 de6d9b64 Fabrice Bellard
            } else {
260 2141dc37 Zdenek Kabelac
                get_le32(pb);
261 de6d9b64 Fabrice Bellard
                get_le32(pb);
262
                get_byte(pb);
263
                size = get_le16(pb); /* size */
264 0ffd77b9 Michael Niedermayer
                sizeX= get_le32(pb); /* size */
265 de6d9b64 Fabrice Bellard
                st->codec.width = get_le32(pb);
266 2a10020b Zdenek Kabelac
                st->codec.height = get_le32(pb);
267
                /* not available for asf */
268 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
269 693feac5 Zdenek Kabelac
                st->codec.bits_per_sample = get_le16(pb); /* depth */
270 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
271 2141dc37 Zdenek Kabelac
                url_fskip(pb, 20);
272 0ffd77b9 Michael Niedermayer
//                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
273
                size= sizeX;
274 2141dc37 Zdenek Kabelac
                if (size > 40) {
275 e40fed0b Zdenek Kabelac
                    st->codec.extradata_size = size - 40;
276 3129cd01 Michael Niedermayer
                    st->codec.extradata = av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
277 e40fed0b Zdenek Kabelac
                    get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
278 2141dc37 Zdenek Kabelac
                }
279 5e29abf8 Roberto Togni
280
        /* Extract palette from extradata if bpp <= 8 */
281
        /* This code assumes that extradata contains only palette */
282
        /* This is true for all paletted codecs implemented in ffmpeg */
283
        if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) {
284
            st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl));
285
#ifdef WORDS_BIGENDIAN
286 19d053c5 Roman Shaposhnik
            for (i = 0; i < FFMIN(st->codec.extradata_size, AVPALETTE_SIZE)/4; i++)
287
                st->codec.palctrl->palette[i] = bswap_32(((uint32_t*)st->codec.extradata)[i]);
288 5e29abf8 Roberto Togni
#else
289
            memcpy(st->codec.palctrl->palette, st->codec.extradata,
290
                   FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
291
#endif
292
            st->codec.palctrl->palette_changed = 1;
293
        }
294
295 7004ffb3 Michael Niedermayer
                st->codec.codec_tag = tag1;
296 17a241dd Fabrice Bellard
                st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
297 afbb5ce4 Michael Niedermayer
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
298
                    st->need_parsing = 1;
299 de6d9b64 Fabrice Bellard
            }
300
            pos2 = url_ftell(pb);
301
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
302
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
303
            break;
304
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
305
            int len1, len2, len3, len4, len5;
306
307
            len1 = get_le16(pb);
308
            len2 = get_le16(pb);
309
            len3 = get_le16(pb);
310
            len4 = get_le16(pb);
311
            len5 = get_le16(pb);
312
            get_str16_nolen(pb, len1, s->title, sizeof(s->title));
313
            get_str16_nolen(pb, len2, s->author, sizeof(s->author));
314
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
315
            get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
316 2141dc37 Zdenek Kabelac
            url_fskip(pb, len5);
317 d13431cd Kevin Kuphal
       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
318
                int desc_count, i;
319
320
                desc_count = get_le16(pb);
321
                for(i=0;i<desc_count;i++)
322
                {
323
                        int name_len,value_type,value_len,value_num = 0;
324
                        char *name, *value;
325
326
                        name_len = get_le16(pb);
327
                        name = (char *)av_mallocz(name_len);
328
                        get_str16_nolen(pb, name_len, name, name_len);
329
                        value_type = get_le16(pb);
330
                        value_len = get_le16(pb);
331
                        if ((value_type == 0) || (value_type == 1)) // unicode or byte
332
                        {
333
                                value = (char *)av_mallocz(value_len);
334
                                get_str16_nolen(pb, value_len, value, value_len);
335 0ecca7a4 Michael Niedermayer
                                if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
336 d13431cd Kevin Kuphal
                                av_free(value);
337
                        }
338
                        if ((value_type >= 2) || (value_type <= 5)) // boolean or DWORD or QWORD or WORD
339
                        {
340
                                if (value_type==2) value_num = get_le32(pb);
341
                                if (value_type==3) value_num = get_le32(pb);
342
                                if (value_type==4) value_num = get_le64(pb);
343
                                if (value_type==5) value_num = get_le16(pb);
344
                                if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
345
                                if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
346
                        }
347
                        av_free(name);
348
                }
349 de6d9b64 Fabrice Bellard
#if 0
350
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
351
            int v1, v2;
352
            get_guid(pb, &g);
353
            v1 = get_le32(pb);
354
            v2 = get_le16(pb);
355
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
356
            int len, v1, n, num;
357
            char str[256], *q;
358
            char tag[16];
359

360
            get_guid(pb, &g);
361
            print_guid(&g);
362 2a10020b Zdenek Kabelac

363 de6d9b64 Fabrice Bellard
            n = get_le32(pb);
364
            for(i=0;i<n;i++) {
365
                num = get_le16(pb); /* stream number */
366
                get_str16(pb, str, sizeof(str));
367
                get_str16(pb, str, sizeof(str));
368
                len = get_le16(pb);
369
                q = tag;
370
                while (len > 0) {
371
                    v1 = get_byte(pb);
372
                    if ((q - tag) < sizeof(tag) - 1)
373
                        *q++ = v1;
374
                    len--;
375
                }
376
                *q = '\0';
377
            }
378
#endif
379
        } else if (url_feof(pb)) {
380
            goto fail;
381
        } else {
382
            url_fseek(pb, gsize - 24, SEEK_CUR);
383
        }
384
    }
385
    get_guid(pb, &g);
386
    get_le64(pb);
387
    get_byte(pb);
388
    get_byte(pb);
389 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
390
        goto fail;
391
    asf->data_offset = url_ftell(pb);
392 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
393
394
    return 0;
395
396
 fail:
397 4c3dff6d Zdenek Kabelac
     for(i=0;i<s->nb_streams;i++) {
398 de6d9b64 Fabrice Bellard
        AVStream *st = s->streams[i];
399 4c3dff6d Zdenek Kabelac
        if (st) {
400 2141dc37 Zdenek Kabelac
            av_free(st->priv_data);
401 4c3dff6d Zdenek Kabelac
            av_free(st->codec.extradata);
402
        }
403 1ea4f593 Fabrice Bellard
        av_free(st);
404 de6d9b64 Fabrice Bellard
    }
405
    return -1;
406
}
407
408 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
409
    switch (bits & 3) \
410
    { \
411
    case 3: var = get_le32(pb); rsize += 4; break; \
412
    case 2: var = get_le16(pb); rsize += 2; break; \
413
    case 1: var = get_byte(pb); rsize++; break; \
414
    default: var = defval; break; \
415
    }
416
417 de6d9b64 Fabrice Bellard
static int asf_get_packet(AVFormatContext *s)
418
{
419
    ASFContext *asf = s->priv_data;
420
    ByteIOContext *pb = &s->pb;
421 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
422 29962fea Michael Niedermayer
    int rsize = 9;
423
    int c;
424
    
425 8d14a25c Michael Niedermayer
    if((url_ftell(&s->pb) - s->data_offset) % asf->packet_size)
426
        return -1;
427 29962fea Michael Niedermayer
    assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
428
    
429
    c = get_byte(pb);
430 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
431 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
432 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
433 2a10020b Zdenek Kabelac
    }
434
    if ((c & 0x0f) == 2) { // always true for now
435 1359c2d4 Zdenek Kabelac
        if (get_le16(pb) != 0) {
436 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
437 bc874dae Michel Bardiaux
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
438 0bd586c5 Mike Melanson
            return AVERROR_IO;
439 2a10020b Zdenek Kabelac
        }
440 29962fea Michael Niedermayer
        rsize+=2;
441
/*    }else{
442
        if (!url_feof(pb))
443
            printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
444 0bd586c5 Mike Melanson
        return AVERROR_IO;*/
445 de6d9b64 Fabrice Bellard
    }
446 2a10020b Zdenek Kabelac
447
    asf->packet_flags = get_byte(pb);
448
    asf->packet_property = get_byte(pb);
449
450
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
451
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
452
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
453
454
    asf->packet_timestamp = get_le32(pb);
455 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
456 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
457 2a10020b Zdenek Kabelac
458
    if (asf->packet_flags & 0x01) {
459
        asf->packet_segsizetype = get_byte(pb); rsize++;
460
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
461
    } else {
462
        asf->packet_segments = 1;
463
        asf->packet_segsizetype = 0x80;
464
    }
465
    asf->packet_size_left = packet_length - padsize - rsize;
466 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
467
        padsize += asf->hdr.min_pktsize - packet_length;
468 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
469 de6d9b64 Fabrice Bellard
#ifdef DEBUG
470 2a10020b Zdenek Kabelac
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
471 de6d9b64 Fabrice Bellard
#endif
472
    return 0;
473
}
474
475
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
476
{
477
    ASFContext *asf = s->priv_data;
478 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
479 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
480 1359c2d4 Zdenek Kabelac
    //static int pc = 0;
481 2a10020b Zdenek Kabelac
    for (;;) {
482
        int rsize = 0;
483 2141dc37 Zdenek Kabelac
        if (asf->packet_size_left < FRAME_HEADER_SIZE
484 1359c2d4 Zdenek Kabelac
            || asf->packet_segments < 1) {
485 2a10020b Zdenek Kabelac
            //asf->packet_size_left <= asf->packet_padsize) {
486 1359c2d4 Zdenek Kabelac
            int ret = asf->packet_size_left + asf->packet_padsize;
487
            //printf("PacketLeftSize:%d  Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
488
            /* fail safe */
489
            url_fskip(pb, ret);
490 82b9e4a2 Michael Niedermayer
            asf->packet_pos= url_ftell(&s->pb);
491 2a10020b Zdenek Kabelac
            ret = asf_get_packet(s);
492
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
493 5acdd6e6 Zdenek Kabelac
            if (ret < 0 || url_feof(pb))
494 0bd586c5 Mike Melanson
                return AVERROR_IO;
495 2141dc37 Zdenek Kabelac
            asf->packet_time_start = 0;
496 2a10020b Zdenek Kabelac
            continue;
497
        }
498 2141dc37 Zdenek Kabelac
        if (asf->packet_time_start == 0) {
499 2a10020b Zdenek Kabelac
            /* read frame header */
500 1359c2d4 Zdenek Kabelac
            int num = get_byte(pb);
501
            asf->packet_segments--;
502 2a10020b Zdenek Kabelac
            rsize++;
503
            asf->packet_key_frame = (num & 0x80) >> 7;
504
            asf->stream_index = asf->asfid2avid[num & 0x7f];
505
            // sequence should be ignored!
506
            DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
507
            DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
508
            DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
509 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);
510 2a10020b Zdenek Kabelac
            if (asf->packet_replic_size > 1) {
511 1305a9d5 Michael Niedermayer
                assert(asf->packet_replic_size >= 8);
512 2a10020b Zdenek Kabelac
                // it should be always at least 8 bytes - FIXME validate
513
                asf->packet_obj_size = get_le32(pb);
514
                asf->packet_frag_timestamp = get_le32(pb); // timestamp
515 acbe6cfa Zdenek Kabelac
                if (asf->packet_replic_size > 8)
516
                    url_fskip(pb, asf->packet_replic_size - 8);
517 2a10020b Zdenek Kabelac
                rsize += asf->packet_replic_size; // FIXME - check validity
518 1305a9d5 Michael Niedermayer
            } else if (asf->packet_replic_size==1){
519 acbe6cfa Zdenek Kabelac
                // multipacket - frag_offset is begining timestamp
520 2a10020b Zdenek Kabelac
                asf->packet_time_start = asf->packet_frag_offset;
521
                asf->packet_frag_offset = 0;
522
                asf->packet_frag_timestamp = asf->packet_timestamp;
523 2141dc37 Zdenek Kabelac
524 1305a9d5 Michael Niedermayer
                asf->packet_time_delta = get_byte(pb);
525
                rsize++;
526
            }else{
527
                assert(asf->packet_replic_size==0);
528
            }
529 2a10020b Zdenek Kabelac
            if (asf->packet_flags & 0x01) {
530
                DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
531 acbe6cfa Zdenek Kabelac
#undef DO_2BITS
532 2a10020b Zdenek Kabelac
                //printf("Fragsize %d\n", asf->packet_frag_size);
533
            } else {
534
                asf->packet_frag_size = asf->packet_size_left - rsize;
535
                //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
536
            }
537 1359c2d4 Zdenek Kabelac
            if (asf->packet_replic_size == 1) {
538 2141dc37 Zdenek Kabelac
                asf->packet_multi_size = asf->packet_frag_size;
539 1359c2d4 Zdenek Kabelac
                if (asf->packet_multi_size > asf->packet_size_left) {
540 2141dc37 Zdenek Kabelac
                    asf->packet_segments = 0;
541
                    continue;
542
                }
543
            }
544 2a10020b Zdenek Kabelac
            asf->packet_size_left -= rsize;
545
            //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
546 1359c2d4 Zdenek Kabelac
547 f3356e9c Michael Niedermayer
            if (asf->stream_index < 0
548
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
549
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
550
                ) {
551 1359c2d4 Zdenek Kabelac
                asf->packet_time_start = 0;
552
                /* unhandled packet (should not happen) */
553
                url_fskip(pb, asf->packet_frag_size);
554
                asf->packet_size_left -= asf->packet_frag_size;
555 b9866ebc Michael Niedermayer
                if(asf->stream_index < 0)
556
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d  %d\n", asf->packet_frag_size, num & 0x7f);
557 1359c2d4 Zdenek Kabelac
                continue;
558
            }
559
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
560 2a10020b Zdenek Kabelac
        }
561
        asf_st = asf->asf_st;
562
563
        if ((asf->packet_frag_offset != asf_st->frag_offset
564
             || (asf->packet_frag_offset
565
                 && asf->packet_seq != asf_st->seq)) // seq should be ignored
566
           ) {
567
            /* cannot continue current packet: free it */
568
            // FIXME better check if packet was already allocated
569 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
570 2a10020b Zdenek Kabelac
                   asf_st->pkt.size,
571 2141dc37 Zdenek Kabelac
                   asf->packet_obj_size,
572 2a10020b Zdenek Kabelac
                   asf->packet_frag_offset, asf_st->frag_offset,
573
                   asf->packet_seq, asf_st->seq, asf->packet_frag_size);
574 2141dc37 Zdenek Kabelac
            if (asf_st->pkt.size)
575 2a10020b Zdenek Kabelac
                av_free_packet(&asf_st->pkt);
576
            asf_st->frag_offset = 0;
577
            if (asf->packet_frag_offset != 0) {
578
                url_fskip(pb, asf->packet_frag_size);
579 160d679c Mike Melanson
                av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
580 2141dc37 Zdenek Kabelac
                asf->packet_size_left -= asf->packet_frag_size;
581 2a10020b Zdenek Kabelac
                continue;
582
            }
583
        }
584 2141dc37 Zdenek Kabelac
        if (asf->packet_replic_size == 1) {
585
            // frag_offset is here used as the begining timestamp
586 2a10020b Zdenek Kabelac
            asf->packet_frag_timestamp = asf->packet_time_start;
587 2141dc37 Zdenek Kabelac
            asf->packet_time_start += asf->packet_time_delta;
588 2a10020b Zdenek Kabelac
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
589 2141dc37 Zdenek Kabelac
            asf->packet_size_left--;
590
            asf->packet_multi_size--;
591
            if (asf->packet_multi_size < asf->packet_obj_size)
592
            {
593
                asf->packet_time_start = 0;
594
                url_fskip(pb, asf->packet_multi_size);
595
                asf->packet_size_left -= asf->packet_multi_size;
596
                continue;
597
            }
598
            asf->packet_multi_size -= asf->packet_obj_size;
599
            //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);
600 2a10020b Zdenek Kabelac
        }
601
        if (asf_st->frag_offset == 0) {
602
            /* new packet */
603
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
604
            asf_st->seq = asf->packet_seq;
605 6c55fd79 Michael Niedermayer
            asf_st->pkt.pts = asf->packet_frag_timestamp;
606 2a10020b Zdenek Kabelac
            asf_st->pkt.stream_index = asf->stream_index;
607 1305a9d5 Michael Niedermayer
            asf_st->packet_pos= asf->packet_pos;            
608
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", 
609 82b9e4a2 Michael Niedermayer
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
610 1305a9d5 Michael Niedermayer
//s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
611 38376f00 Kevin Kuphal
            if (s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO) 
612
                asf->packet_key_frame = 1;
613 2a10020b Zdenek Kabelac
            if (asf->packet_key_frame)
614
                asf_st->pkt.flags |= PKT_FLAG_KEY;
615
        }
616
617
        /* read data */
618
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
619
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
620
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
621 2141dc37 Zdenek Kabelac
        asf->packet_size_left -= asf->packet_frag_size;
622
        if (asf->packet_size_left < 0)
623
            continue;
624 2a10020b Zdenek Kabelac
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
625
                   asf->packet_frag_size);
626
        asf_st->frag_offset += asf->packet_frag_size;
627
        /* test if whole packet is read */
628
        if (asf_st->frag_offset == asf_st->pkt.size) {
629
            /* return packet */
630
            if (asf_st->ds_span > 1) {
631 2141dc37 Zdenek Kabelac
                /* packet descrambling */
632 2a10020b Zdenek Kabelac
                char* newdata = av_malloc(asf_st->pkt.size);
633
                if (newdata) {
634
                    int offset = 0;
635
                    while (offset < asf_st->pkt.size) {
636
                        int off = offset / asf_st->ds_chunk_size;
637
                        int row = off / asf_st->ds_span;
638
                        int col = off % asf_st->ds_span;
639
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
640
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
641
                        memcpy(newdata + offset,
642
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
643
                               asf_st->ds_chunk_size);
644
                        offset += asf_st->ds_chunk_size;
645
                    }
646
                    av_free(asf_st->pkt.data);
647
                    asf_st->pkt.data = newdata;
648
                }
649
            }
650
            asf_st->frag_offset = 0;
651
            memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
652
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
653
            asf_st->pkt.size = 0;
654
            asf_st->pkt.data = 0;
655
            break; // packet completed
656
        }
657 de6d9b64 Fabrice Bellard
    }
658
    return 0;
659
}
660
661
static int asf_read_close(AVFormatContext *s)
662
{
663
    int i;
664
665
    for(i=0;i<s->nb_streams;i++) {
666 4c3dff6d Zdenek Kabelac
        AVStream *st = s->streams[i];
667
        av_free(st->priv_data);
668
        av_free(st->codec.extradata);
669 5e29abf8 Roberto Togni
    av_free(st->codec.palctrl);
670 de6d9b64 Fabrice Bellard
    }
671
    return 0;
672
}
673
674 38376f00 Kevin Kuphal
// Added to support seeking after packets have been read
675
// If information is not reset, read_packet fails due to
676
// leftover information from previous reads
677
static void asf_reset_header(AVFormatContext *s)
678
{
679
    ASFContext *asf = s->priv_data;
680 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
681
    int i;
682 38376f00 Kevin Kuphal
683
    asf->packet_nb_frames = 0;
684
    asf->packet_timestamp_start = -1;
685
    asf->packet_timestamp_end = -1;
686
    asf->packet_size_left = 0;
687
    asf->packet_segments = 0;
688
    asf->packet_flags = 0;
689
    asf->packet_property = 0;
690
    asf->packet_timestamp = 0;
691
    asf->packet_segsizetype = 0;
692
    asf->packet_segments = 0;
693
    asf->packet_seq = 0;
694
    asf->packet_replic_size = 0;
695
    asf->packet_key_frame = 0;
696
    asf->packet_padsize = 0;
697
    asf->packet_frag_offset = 0;
698
    asf->packet_frag_size = 0;
699
    asf->packet_frag_timestamp = 0;
700
    asf->packet_multi_size = 0;
701
    asf->packet_obj_size = 0;
702
    asf->packet_time_delta = 0;
703
    asf->packet_time_start = 0;
704 82b9e4a2 Michael Niedermayer
    
705
    for(i=0; i<s->nb_streams; i++){
706
        asf_st= s->streams[i]->priv_data;
707
        av_free_packet(&asf_st->pkt);
708
        asf_st->frag_offset=0;
709
        asf_st->seq=0;
710
    }
711
    asf->asf_st= NULL;
712 38376f00 Kevin Kuphal
}
713
714 8d14a25c Michael Niedermayer
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
715 38376f00 Kevin Kuphal
{
716
    ASFContext *asf = s->priv_data;
717
    AVPacket pkt1, *pkt = &pkt1;
718 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
719 580fb5e7 Michael Niedermayer
    int64_t pts;
720 82b9e4a2 Michael Niedermayer
    int64_t pos= *ppos;
721 3e9245a9 Michael Niedermayer
    int i;
722
    int64_t start_pos[s->nb_streams];
723
    
724
    for(i=0; i<s->nb_streams; i++){
725
        start_pos[i]= pos;
726
    }
727 8d14a25c Michael Niedermayer
    
728
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
729
    *ppos= pos;
730
    url_fseek(&s->pb, pos, SEEK_SET);
731
    
732 82b9e4a2 Michael Niedermayer
//printf("asf_read_pts\n");
733
    asf_reset_header(s);
734 3e9245a9 Michael Niedermayer
    for(;;){
735 82b9e4a2 Michael Niedermayer
        if (av_read_frame(s, pkt) < 0){
736 bc874dae Michel Bardiaux
            av_log(s, AV_LOG_INFO, "seek failed\n");
737 580fb5e7 Michael Niedermayer
                return AV_NOPTS_VALUE;
738 82b9e4a2 Michael Niedermayer
        }
739 8d14a25c Michael Niedermayer
        
740 cdd5034f Michael Niedermayer
        pts= pkt->pts * 1000 / AV_TIME_BASE;
741 580fb5e7 Michael Niedermayer
742
        av_free_packet(pkt);
743 3e9245a9 Michael Niedermayer
        if(pkt->flags&PKT_FLAG_KEY){
744
            i= pkt->stream_index;
745
746
            asf_st= s->streams[i]->priv_data;
747
748
            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
749 8d14a25c Michael Niedermayer
            pos= asf_st->packet_pos;
750 09646bab Michael Niedermayer
751 3e9245a9 Michael Niedermayer
            av_add_index_entry(s->streams[i], pos, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
752 8d14a25c Michael Niedermayer
            start_pos[i]= asf_st->packet_pos + 1;
753 3e9245a9 Michael Niedermayer
            
754
            if(pkt->stream_index == stream_index)
755
               break;
756
        }
757
    }
758
759
    *ppos= pos;
760 82b9e4a2 Michael Niedermayer
//printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
761 580fb5e7 Michael Niedermayer
762
    return pts;
763 38376f00 Kevin Kuphal
}
764
765 3ba1438d Michael Niedermayer
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
766 2a10020b Zdenek Kabelac
{
767 afda223c Fabrice Bellard
    ASFContext *asf = s->priv_data;
768 580fb5e7 Michael Niedermayer
    
769 a602556e Michael Niedermayer
    if (asf->packet_size <= 0)
770 38376f00 Kevin Kuphal
        return -1;
771
772 3ba1438d Michael Niedermayer
    if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
773 8d14a25c Michael Niedermayer
        return -1;
774 3e9245a9 Michael Niedermayer
775 38376f00 Kevin Kuphal
    asf_reset_header(s);
776
    return 0;
777 2a10020b Zdenek Kabelac
}
778
779 0570bf06 Zdenek Kabelac
static AVInputFormat asf_iformat = {
780 c9a65ca8 Fabrice Bellard
    "asf",
781
    "asf format",
782
    sizeof(ASFContext),
783
    asf_probe,
784
    asf_read_header,
785
    asf_read_packet,
786
    asf_read_close,
787 2a10020b Zdenek Kabelac
    asf_read_seek,
788 8d14a25c Michael Niedermayer
    asf_read_pts,
789 c9a65ca8 Fabrice Bellard
};
790
791 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
792 542993b0 Konstantin Andreyev
    extern AVOutputFormat asf_oformat;
793
    extern AVOutputFormat asf_stream_oformat;
794 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
795 8b3c13f9 Philip Gladstone
796 c9a65ca8 Fabrice Bellard
int asf_init(void)
797
{
798
    av_register_input_format(&asf_iformat);
799 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
800 c9a65ca8 Fabrice Bellard
    av_register_output_format(&asf_oformat);
801 8b3c13f9 Philip Gladstone
    av_register_output_format(&asf_stream_oformat);
802 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
803 c9a65ca8 Fabrice Bellard
    return 0;
804
}