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ffmpeg / libavformat / asfdec.c @ 0bd433a9

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1
/*
2
 * ASF compatible demuxer
3
 * Copyright (c) 2000, 2001 Fabrice Bellard
4
 *
5
 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
//#define DEBUG
23

    
24
#include "libavutil/common.h"
25
#include "libavutil/avstring.h"
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#include "libavcodec/mpegaudio.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "riff.h"
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#include "asf.h"
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#include "asfcrypt.h"
32
#include "avlanguage.h"
33

    
34
typedef struct {
35
    int asfid2avid[128];                 ///< conversion table from asf ID 2 AVStream ID
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    ASFStream streams[128];              ///< it's max number and it's not that big
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    uint32_t stream_bitrates[128];       ///< max number of streams, bitrate for each (for streaming)
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    AVRational dar[128];
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    char stream_languages[128][6];       ///< max number of streams, language for each (RFC1766, e.g. en-US)
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    /* non streamed additonnal info */
41
    /* packet filling */
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    int packet_size_left;
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    /* only for reading */
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    uint64_t data_offset;                ///< beginning of the first data packet
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    uint64_t data_object_offset;         ///< data object offset (excl. GUID & size)
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    uint64_t data_object_size;           ///< size of the data object
47
    int index_read;
48

    
49
    ASFMainHeader hdr;
50

    
51
    int packet_flags;
52
    int packet_property;
53
    int packet_timestamp;
54
    int packet_segsizetype;
55
    int packet_segments;
56
    int packet_seq;
57
    int packet_replic_size;
58
    int packet_key_frame;
59
    int packet_padsize;
60
    unsigned int packet_frag_offset;
61
    unsigned int packet_frag_size;
62
    int64_t packet_frag_timestamp;
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    int packet_multi_size;
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    int packet_obj_size;
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    int packet_time_delta;
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    int packet_time_start;
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    int64_t packet_pos;
68

    
69
    int stream_index;
70

    
71
    ASFStream* asf_st;                   ///< currently decoded stream
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} ASFContext;
73

    
74
#undef NDEBUG
75
#include <assert.h>
76

    
77
#define ASF_MAX_STREAMS 127
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#define FRAME_HEADER_SIZE 17
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// Fix Me! FRAME_HEADER_SIZE may be different.
80

    
81
static const ff_asf_guid index_guid = {
82
    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
83
};
84

    
85
static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
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    0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
87
};
88
/**********************************/
89
/* decoding */
90

    
91
#ifdef DEBUG
92
#define PRINT_IF_GUID(g,cmp) \
93
if (!ff_guidcmp(g, &cmp)) \
94
    av_dlog(NULL, "(GUID: %s) ", #cmp)
95

    
96
static void print_guid(const ff_asf_guid *g)
97
{
98
    int i;
99
    PRINT_IF_GUID(g, ff_asf_header);
100
    else PRINT_IF_GUID(g, ff_asf_file_header);
101
    else PRINT_IF_GUID(g, ff_asf_stream_header);
102
    else PRINT_IF_GUID(g, ff_asf_audio_stream);
103
    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
104
    else PRINT_IF_GUID(g, ff_asf_video_stream);
105
    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
106
    else PRINT_IF_GUID(g, ff_asf_command_stream);
107
    else PRINT_IF_GUID(g, ff_asf_comment_header);
108
    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
109
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
110
    else PRINT_IF_GUID(g, ff_asf_data_header);
111
    else PRINT_IF_GUID(g, index_guid);
112
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
113
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
114
    else PRINT_IF_GUID(g, ff_asf_my_guid);
115
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
116
    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
117
    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
118
    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
119
    else PRINT_IF_GUID(g, ff_asf_metadata_header);
120
    else PRINT_IF_GUID(g, ff_asf_marker_header);
121
    else PRINT_IF_GUID(g, stream_bitrate_guid);
122
    else PRINT_IF_GUID(g, ff_asf_language_guid);
123
    else
124
        av_dlog(NULL, "(GUID: unknown) ");
125
    for(i=0;i<16;i++)
126
        av_dlog(NULL, " 0x%02x,", (*g)[i]);
127
    av_dlog(NULL, "}\n");
128
}
129
#undef PRINT_IF_GUID
130
#else
131
#define print_guid(g)
132
#endif
133

    
134
void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
135
{
136
    assert(sizeof(*g) == 16);
137
    avio_read(s, *g, sizeof(*g));
138
}
139

    
140
static int asf_probe(AVProbeData *pd)
141
{
142
    /* check file header */
143
    if (!ff_guidcmp(pd->buf, &ff_asf_header))
144
        return AVPROBE_SCORE_MAX;
145
    else
146
        return 0;
147
}
148

    
149
static int get_value(AVIOContext *pb, int type){
150
    switch(type){
151
        case 2: return avio_rl32(pb);
152
        case 3: return avio_rl32(pb);
153
        case 4: return avio_rl64(pb);
154
        case 5: return avio_rl16(pb);
155
        default:return INT_MIN;
156
    }
157
}
158

    
159
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
160
{
161
    char *value;
162
    int64_t off = avio_tell(s->pb);
163

    
164
    if ((unsigned)len >= (UINT_MAX - 1)/2)
165
        return;
166

    
167
    value = av_malloc(2*len+1);
168
    if (!value)
169
        goto finish;
170

    
171
    if (type == 0) {         // UTF16-LE
172
        avio_get_str16le(s->pb, len, value, 2*len + 1);
173
    } else if (type > 1 && type <= 5) {  // boolean or DWORD or QWORD or WORD
174
        uint64_t num = get_value(s->pb, type);
175
        snprintf(value, len, "%"PRIu64, num);
176
    } else {
177
        av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
178
        goto finish;
179
    }
180
    if (*value)
181
        av_metadata_set2(&s->metadata, key, value, 0);
182
finish:
183
    av_freep(&value);
184
    avio_seek(s->pb, off + len, SEEK_SET);
185
}
186

    
187
static int asf_read_file_properties(AVFormatContext *s, int64_t size)
188
{
189
    ASFContext *asf = s->priv_data;
190
    AVIOContext *pb = s->pb;
191

    
192
    ff_get_guid(pb, &asf->hdr.guid);
193
    asf->hdr.file_size          = avio_rl64(pb);
194
    asf->hdr.create_time        = avio_rl64(pb);
195
    avio_rl64(pb);                               /* number of packets */
196
    asf->hdr.play_time          = avio_rl64(pb);
197
    asf->hdr.send_time          = avio_rl64(pb);
198
    asf->hdr.preroll            = avio_rl32(pb);
199
    asf->hdr.ignore             = avio_rl32(pb);
200
    asf->hdr.flags              = avio_rl32(pb);
201
    asf->hdr.min_pktsize        = avio_rl32(pb);
202
    asf->hdr.max_pktsize        = avio_rl32(pb);
203
    asf->hdr.max_bitrate        = avio_rl32(pb);
204
    s->packet_size = asf->hdr.max_pktsize;
205

    
206
    return 0;
207
}
208

    
209
static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
210
{
211
    ASFContext *asf = s->priv_data;
212
    AVIOContext *pb = s->pb;
213
    AVStream *st;
214
    ASFStream *asf_st;
215
    ff_asf_guid g;
216
    enum AVMediaType type;
217
    int type_specific_size, sizeX;
218
    uint64_t total_size;
219
    unsigned int tag1;
220
    int64_t pos1, pos2, start_time;
221
    int test_for_ext_stream_audio, is_dvr_ms_audio=0;
222

    
223
    if (s->nb_streams == ASF_MAX_STREAMS) {
224
        av_log(s, AV_LOG_ERROR, "too many streams\n");
225
        return AVERROR(EINVAL);
226
    }
227

    
228
    pos1 = avio_tell(pb);
229

    
230
    st = av_new_stream(s, 0);
231
    if (!st)
232
        return AVERROR(ENOMEM);
233
    av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
234
    asf_st = av_mallocz(sizeof(ASFStream));
235
    if (!asf_st)
236
        return AVERROR(ENOMEM);
237
    st->priv_data = asf_st;
238
    st->start_time = 0;
239
    start_time = asf->hdr.preroll;
240

    
241
    asf_st->stream_language_index = 128; // invalid stream index means no language info
242

    
243
    if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
244
        st->duration = asf->hdr.play_time /
245
            (10000000 / 1000) - start_time;
246
    }
247
    ff_get_guid(pb, &g);
248

    
249
    test_for_ext_stream_audio = 0;
250
    if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
251
        type = AVMEDIA_TYPE_AUDIO;
252
    } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
253
        type = AVMEDIA_TYPE_VIDEO;
254
    } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
255
        type = AVMEDIA_TYPE_VIDEO;
256
        st->codec->codec_id = CODEC_ID_MJPEG;
257
    } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
258
        type = AVMEDIA_TYPE_DATA;
259
    } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
260
        test_for_ext_stream_audio = 1;
261
        type = AVMEDIA_TYPE_UNKNOWN;
262
    } else {
263
        return -1;
264
    }
265
    ff_get_guid(pb, &g);
266
    total_size = avio_rl64(pb);
267
    type_specific_size = avio_rl32(pb);
268
    avio_rl32(pb);
269
    st->id = avio_rl16(pb) & 0x7f; /* stream id */
270
    // mapping of asf ID to AV stream ID;
271
    asf->asfid2avid[st->id] = s->nb_streams - 1;
272

    
273
    avio_rl32(pb);
274

    
275
    if (test_for_ext_stream_audio) {
276
        ff_get_guid(pb, &g);
277
        if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
278
            type = AVMEDIA_TYPE_AUDIO;
279
            is_dvr_ms_audio=1;
280
            ff_get_guid(pb, &g);
281
            avio_rl32(pb);
282
            avio_rl32(pb);
283
            avio_rl32(pb);
284
            ff_get_guid(pb, &g);
285
            avio_rl32(pb);
286
        }
287
    }
288

    
289
    st->codec->codec_type = type;
290
    if (type == AVMEDIA_TYPE_AUDIO) {
291
        int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
292
        if (ret < 0)
293
            return ret;
294
        if (is_dvr_ms_audio) {
295
            // codec_id and codec_tag are unreliable in dvr_ms
296
            // files. Set them later by probing stream.
297
            st->codec->codec_id = CODEC_ID_PROBE;
298
            st->codec->codec_tag = 0;
299
        }
300
        if (st->codec->codec_id == CODEC_ID_AAC) {
301
            st->need_parsing = AVSTREAM_PARSE_NONE;
302
        } else {
303
            st->need_parsing = AVSTREAM_PARSE_FULL;
304
        }
305
        /* We have to init the frame size at some point .... */
306
        pos2 = avio_tell(pb);
307
        if (size >= (pos2 + 8 - pos1 + 24)) {
308
            asf_st->ds_span = avio_r8(pb);
309
            asf_st->ds_packet_size = avio_rl16(pb);
310
            asf_st->ds_chunk_size = avio_rl16(pb);
311
            avio_rl16(pb); //ds_data_size
312
            avio_r8(pb);   //ds_silence_data
313
        }
314
        //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
315
        //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
316
        //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
317
        if (asf_st->ds_span > 1) {
318
            if (!asf_st->ds_chunk_size
319
                    || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
320
                    || asf_st->ds_packet_size % asf_st->ds_chunk_size)
321
                asf_st->ds_span = 0; // disable descrambling
322
        }
323
        switch (st->codec->codec_id) {
324
            case CODEC_ID_MP3:
325
                st->codec->frame_size = MPA_FRAME_SIZE;
326
                break;
327
            case CODEC_ID_PCM_S16LE:
328
            case CODEC_ID_PCM_S16BE:
329
            case CODEC_ID_PCM_U16LE:
330
            case CODEC_ID_PCM_U16BE:
331
            case CODEC_ID_PCM_S8:
332
            case CODEC_ID_PCM_U8:
333
            case CODEC_ID_PCM_ALAW:
334
            case CODEC_ID_PCM_MULAW:
335
                st->codec->frame_size = 1;
336
                break;
337
            default:
338
                /* This is probably wrong, but it prevents a crash later */
339
                st->codec->frame_size = 1;
340
                break;
341
        }
342
    } else if (type == AVMEDIA_TYPE_VIDEO &&
343
            size - (avio_tell(pb) - pos1 + 24) >= 51) {
344
        avio_rl32(pb);
345
        avio_rl32(pb);
346
        avio_r8(pb);
347
        avio_rl16(pb);        /* size */
348
        sizeX= avio_rl32(pb); /* size */
349
        st->codec->width = avio_rl32(pb);
350
        st->codec->height = avio_rl32(pb);
351
        /* not available for asf */
352
        avio_rl16(pb); /* panes */
353
        st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
354
        tag1 = avio_rl32(pb);
355
        avio_skip(pb, 20);
356
        //                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
357
        if (sizeX > 40) {
358
            st->codec->extradata_size = sizeX - 40;
359
            st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
360
            avio_read(pb, st->codec->extradata, st->codec->extradata_size);
361
        }
362

    
363
        /* Extract palette from extradata if bpp <= 8 */
364
        /* This code assumes that extradata contains only palette */
365
        /* This is true for all paletted codecs implemented in ffmpeg */
366
        if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
367
            int av_unused i;
368
#if HAVE_BIGENDIAN
369
            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
370
                asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
371
#else
372
            memcpy(asf_st->palette, st->codec->extradata,
373
                   FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
374
#endif
375
            asf_st->palette_changed = 1;
376
        }
377

    
378
        st->codec->codec_tag = tag1;
379
        st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
380
        if(tag1 == MKTAG('D', 'V', 'R', ' ')){
381
            st->need_parsing = AVSTREAM_PARSE_FULL;
382
            // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
383
            st->codec->width  =
384
                st->codec->height = 0;
385
            av_freep(&st->codec->extradata);
386
            st->codec->extradata_size=0;
387
        }
388
        if(st->codec->codec_id == CODEC_ID_H264)
389
            st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
390
    }
391
    pos2 = avio_tell(pb);
392
    avio_skip(pb, size - (pos2 - pos1 + 24));
393

    
394
    return 0;
395
}
396

    
397
static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
398
{
399
    ASFContext *asf = s->priv_data;
400
    AVIOContext *pb = s->pb;
401
    ff_asf_guid g;
402
    int ext_len, payload_ext_ct, stream_ct, i;
403
    uint32_t ext_d, leak_rate, stream_num;
404
    unsigned int stream_languageid_index;
405

    
406
    avio_rl64(pb); // starttime
407
    avio_rl64(pb); // endtime
408
    leak_rate = avio_rl32(pb); // leak-datarate
409
    avio_rl32(pb); // bucket-datasize
410
    avio_rl32(pb); // init-bucket-fullness
411
    avio_rl32(pb); // alt-leak-datarate
412
    avio_rl32(pb); // alt-bucket-datasize
413
    avio_rl32(pb); // alt-init-bucket-fullness
414
    avio_rl32(pb); // max-object-size
415
    avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
416
    stream_num = avio_rl16(pb); // stream-num
417

    
418
    stream_languageid_index = avio_rl16(pb); // stream-language-id-index
419
    if (stream_num < 128)
420
        asf->streams[stream_num].stream_language_index = stream_languageid_index;
421

    
422
    avio_rl64(pb); // avg frametime in 100ns units
423
    stream_ct = avio_rl16(pb); //stream-name-count
424
    payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
425

    
426
    if (stream_num < 128)
427
        asf->stream_bitrates[stream_num] = leak_rate;
428

    
429
    for (i=0; i<stream_ct; i++){
430
        avio_rl16(pb);
431
        ext_len = avio_rl16(pb);
432
        avio_skip(pb, ext_len);
433
    }
434

    
435
    for (i=0; i<payload_ext_ct; i++){
436
        ff_get_guid(pb, &g);
437
        ext_d=avio_rl16(pb);
438
        ext_len=avio_rl32(pb);
439
        avio_skip(pb, ext_len);
440
    }
441

    
442
    return 0;
443
}
444

    
445
static int asf_read_content_desc(AVFormatContext *s, int64_t size)
446
{
447
    AVIOContext *pb = s->pb;
448
    int len1, len2, len3, len4, len5;
449

    
450
    len1 = avio_rl16(pb);
451
    len2 = avio_rl16(pb);
452
    len3 = avio_rl16(pb);
453
    len4 = avio_rl16(pb);
454
    len5 = avio_rl16(pb);
455
    get_tag(s, "title"    , 0, len1);
456
    get_tag(s, "author"   , 0, len2);
457
    get_tag(s, "copyright", 0, len3);
458
    get_tag(s, "comment"  , 0, len4);
459
    avio_skip(pb, len5);
460

    
461
    return 0;
462
}
463

    
464
static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
465
{
466
    AVIOContext *pb = s->pb;
467
    ASFContext *asf = s->priv_data;
468
    int desc_count, i, ret;
469

    
470
    desc_count = avio_rl16(pb);
471
    for(i=0;i<desc_count;i++) {
472
        int name_len,value_type,value_len;
473
        char name[1024];
474

    
475
        name_len = avio_rl16(pb);
476
        if (name_len%2)     // must be even, broken lavf versions wrote len-1
477
            name_len += 1;
478
        if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
479
            avio_skip(pb, name_len - ret);
480
        value_type = avio_rl16(pb);
481
        value_len  = avio_rl16(pb);
482
        if (!value_type && value_len%2)
483
            value_len += 1;
484
        /**
485
         * My sample has that stream set to 0 maybe that mean the container.
486
         * Asf stream count start at 1. I am using 0 to the container value since it's unused
487
         */
488
        if (!strcmp(name, "AspectRatioX")){
489
            asf->dar[0].num= get_value(s->pb, value_type);
490
        } else if(!strcmp(name, "AspectRatioY")){
491
            asf->dar[0].den= get_value(s->pb, value_type);
492
        } else
493
            get_tag(s, name, value_type, value_len);
494
    }
495

    
496
    return 0;
497
}
498

    
499
static int asf_read_language_list(AVFormatContext *s, int64_t size)
500
{
501
    AVIOContext *pb = s->pb;
502
    ASFContext *asf = s->priv_data;
503
    int j, ret;
504
    int stream_count = avio_rl16(pb);
505
    for(j = 0; j < stream_count; j++) {
506
        char lang[6];
507
        unsigned int lang_len = avio_r8(pb);
508
        if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
509
            avio_skip(pb, lang_len - ret);
510
        if (j < 128)
511
            av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
512
    }
513

    
514
    return 0;
515
}
516

    
517
static int asf_read_metadata(AVFormatContext *s, int64_t size)
518
{
519
    AVIOContext *pb = s->pb;
520
    ASFContext *asf = s->priv_data;
521
    int n, stream_num, name_len, value_len, value_type, value_num;
522
    int ret, i;
523
    n = avio_rl16(pb);
524

    
525
    for(i=0;i<n;i++) {
526
        char name[1024];
527

    
528
        avio_rl16(pb); //lang_list_index
529
        stream_num= avio_rl16(pb);
530
        name_len=   avio_rl16(pb);
531
        value_type= avio_rl16(pb);
532
        value_len=  avio_rl32(pb);
533

    
534
        if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
535
            avio_skip(pb, name_len - ret);
536
        //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
537
        value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
538
        avio_skip(pb, value_len - 2);
539

    
540
        if(stream_num<128){
541
            if     (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
542
            else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
543
        }
544
    }
545

    
546
    return 0;
547
}
548

    
549
static int asf_read_marker(AVFormatContext *s, int64_t size)
550
{
551
    AVIOContext *pb = s->pb;
552
    int i, count, name_len, ret;
553
    char name[1024];
554

    
555
    avio_rl64(pb);            // reserved 16 bytes
556
    avio_rl64(pb);            // ...
557
    count = avio_rl32(pb);    // markers count
558
    avio_rl16(pb);            // reserved 2 bytes
559
    name_len = avio_rl16(pb); // name length
560
    for(i=0;i<name_len;i++){
561
        avio_r8(pb); // skip the name
562
    }
563

    
564
    for(i=0;i<count;i++){
565
        int64_t pres_time;
566
        int name_len;
567

    
568
        avio_rl64(pb);             // offset, 8 bytes
569
        pres_time = avio_rl64(pb); // presentation time
570
        avio_rl16(pb);             // entry length
571
        avio_rl32(pb);             // send time
572
        avio_rl32(pb);             // flags
573
        name_len = avio_rl32(pb);  // name length
574
        if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
575
            avio_skip(pb, name_len - ret);
576
        ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
577
    }
578

    
579
    return 0;
580
}
581

    
582
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
583
{
584
    ASFContext *asf = s->priv_data;
585
    ff_asf_guid g;
586
    AVIOContext *pb = s->pb;
587
    int i;
588
    int64_t gsize;
589

    
590
    ff_get_guid(pb, &g);
591
    if (ff_guidcmp(&g, &ff_asf_header))
592
        return -1;
593
    avio_rl64(pb);
594
    avio_rl32(pb);
595
    avio_r8(pb);
596
    avio_r8(pb);
597
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
598
    for(;;) {
599
        uint64_t gpos= avio_tell(pb);
600
        ff_get_guid(pb, &g);
601
        gsize = avio_rl64(pb);
602
        av_dlog(s, "%08"PRIx64": ", gpos);
603
        print_guid(&g);
604
        av_dlog(s, "  size=0x%"PRIx64"\n", gsize);
605
        if (!ff_guidcmp(&g, &ff_asf_data_header)) {
606
            asf->data_object_offset = avio_tell(pb);
607
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
608
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
609
                asf->data_object_size = gsize - 24;
610
            } else {
611
                asf->data_object_size = (uint64_t)-1;
612
            }
613
            break;
614
        }
615
        if (gsize < 24)
616
            return -1;
617
        if (!ff_guidcmp(&g, &ff_asf_file_header)) {
618
            asf_read_file_properties(s, gsize);
619
        } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
620
            asf_read_stream_properties(s, gsize);
621
        } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
622
            asf_read_content_desc(s, gsize);
623
        } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
624
            asf_read_language_list(s, gsize);
625
        } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
626
            asf_read_ext_content_desc(s, gsize);
627
        } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
628
            asf_read_metadata(s, gsize);
629
        } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
630
            asf_read_ext_stream_properties(s, gsize);
631

    
632
            // there could be a optional stream properties object to follow
633
            // if so the next iteration will pick it up
634
            continue;
635
        } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
636
            int v1, v2;
637
            ff_get_guid(pb, &g);
638
            v1 = avio_rl32(pb);
639
            v2 = avio_rl16(pb);
640
            continue;
641
        } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
642
            asf_read_marker(s, gsize);
643
        } else if (pb->eof_reached) {
644
            return -1;
645
        } else {
646
            if (!s->keylen) {
647
                if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
648
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
649
                } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
650
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
651
                } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
652
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
653
                }
654
            }
655
        }
656
        if(avio_tell(pb) != gpos + gsize)
657
            av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
658
        avio_seek(pb, gpos + gsize, SEEK_SET);
659
    }
660
    ff_get_guid(pb, &g);
661
    avio_rl64(pb);
662
    avio_r8(pb);
663
    avio_r8(pb);
664
    if (pb->eof_reached)
665
        return -1;
666
    asf->data_offset = avio_tell(pb);
667
    asf->packet_size_left = 0;
668

    
669

    
670
    for(i=0; i<128; i++){
671
        int stream_num= asf->asfid2avid[i];
672
        if(stream_num>=0){
673
            AVStream *st = s->streams[stream_num];
674
            if (!st->codec->bit_rate)
675
                st->codec->bit_rate = asf->stream_bitrates[i];
676
            if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
677
                av_reduce(&st->sample_aspect_ratio.num,
678
                          &st->sample_aspect_ratio.den,
679
                          asf->dar[i].num, asf->dar[i].den, INT_MAX);
680
            } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
681
                av_reduce(&st->sample_aspect_ratio.num,
682
                          &st->sample_aspect_ratio.den,
683
                          asf->dar[0].num, asf->dar[0].den, INT_MAX);
684

    
685
//av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
686

    
687
            // copy and convert language codes to the frontend
688
            if (asf->streams[i].stream_language_index < 128) {
689
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
690
                if (rfc1766 && strlen(rfc1766) > 1) {
691
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
692
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
693
                    if (iso6392)
694
                        av_metadata_set2(&st->metadata, "language", iso6392, 0);
695
                }
696
            }
697
        }
698
    }
699

    
700
    ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
701

    
702
    return 0;
703
}
704

    
705
#define DO_2BITS(bits, var, defval) \
706
    switch (bits & 3) \
707
    { \
708
    case 3: var = avio_rl32(pb); rsize += 4; break; \
709
    case 2: var = avio_rl16(pb); rsize += 2; break; \
710
    case 1: var = avio_r8(pb);   rsize++; break; \
711
    default: var = defval; break; \
712
    }
713

    
714
/**
715
 * Load a single ASF packet into the demuxer.
716
 * @param s demux context
717
 * @param pb context to read data from
718
 * @return 0 on success, <0 on error
719
 */
720
static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
721
{
722
    ASFContext *asf = s->priv_data;
723
    uint32_t packet_length, padsize;
724
    int rsize = 8;
725
    int c, d, e, off;
726

    
727
    // if we do not know packet size, allow skipping up to 32 kB
728
    off= 32768;
729
    if (s->packet_size > 0)
730
        off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
731

    
732
    c=d=e=-1;
733
    while(off-- > 0){
734
        c=d; d=e;
735
        e= avio_r8(pb);
736
        if(c == 0x82 && !d && !e)
737
            break;
738
    }
739

    
740
    if (c != 0x82) {
741
        /**
742
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
743
         * if the packet sync code above triggers -EAGAIN). This does not
744
         * imply complete -EAGAIN handling support at random positions in
745
         * the stream.
746
         */
747
        if (pb->error == AVERROR(EAGAIN))
748
            return AVERROR(EAGAIN);
749
        if (!pb->eof_reached)
750
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, avio_tell(pb));
751
    }
752
    if ((c & 0x8f) == 0x82) {
753
        if (d || e) {
754
            if (!pb->eof_reached)
755
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
756
            return -1;
757
        }
758
        c= avio_r8(pb);
759
        d= avio_r8(pb);
760
        rsize+=3;
761
    }else{
762
        avio_seek(pb, -1, SEEK_CUR); //FIXME
763
    }
764

    
765
    asf->packet_flags    = c;
766
    asf->packet_property = d;
767

    
768
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
769
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
770
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
771

    
772
    //the following checks prevent overflows and infinite loops
773
    if(!packet_length || packet_length >= (1U<<29)){
774
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
775
        return -1;
776
    }
777
    if(padsize >= packet_length){
778
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
779
        return -1;
780
    }
781

    
782
    asf->packet_timestamp = avio_rl32(pb);
783
    avio_rl16(pb); /* duration */
784
    // rsize has at least 11 bytes which have to be present
785

    
786
    if (asf->packet_flags & 0x01) {
787
        asf->packet_segsizetype = avio_r8(pb); rsize++;
788
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
789
    } else {
790
        asf->packet_segments = 1;
791
        asf->packet_segsizetype = 0x80;
792
    }
793
    asf->packet_size_left = packet_length - padsize - rsize;
794
    if (packet_length < asf->hdr.min_pktsize)
795
        padsize += asf->hdr.min_pktsize - packet_length;
796
    asf->packet_padsize = padsize;
797
    av_dlog(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
798
    return 0;
799
}
800

    
801
/**
802
 *
803
 * @return <0 if error
804
 */
805
static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
806
    ASFContext *asf = s->priv_data;
807
    int rsize = 1;
808
    int num = avio_r8(pb);
809
    int64_t ts0, ts1;
810

    
811
    asf->packet_segments--;
812
    asf->packet_key_frame = num >> 7;
813
    asf->stream_index = asf->asfid2avid[num & 0x7f];
814
    // sequence should be ignored!
815
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
816
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
817
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
818
//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);
819
    if (asf->packet_replic_size >= 8) {
820
        asf->packet_obj_size = avio_rl32(pb);
821
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
822
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
823
            return -1;
824
        }
825
        asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
826
        if(asf->packet_replic_size >= 8+38+4){
827
//            for(i=0; i<asf->packet_replic_size-8; i++)
828
//                av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
829
//            av_log(s, AV_LOG_DEBUG, "\n");
830
            avio_skip(pb, 10);
831
            ts0= avio_rl64(pb);
832
            ts1= avio_rl64(pb);
833
            avio_skip(pb, 12);
834
            avio_rl32(pb);
835
            avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
836
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
837
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
838
        }else
839
            avio_skip(pb, asf->packet_replic_size - 8);
840
        rsize += asf->packet_replic_size; // FIXME - check validity
841
    } else if (asf->packet_replic_size==1){
842
        // multipacket - frag_offset is beginning timestamp
843
        asf->packet_time_start = asf->packet_frag_offset;
844
        asf->packet_frag_offset = 0;
845
        asf->packet_frag_timestamp = asf->packet_timestamp;
846

    
847
        asf->packet_time_delta = avio_r8(pb);
848
        rsize++;
849
    }else if(asf->packet_replic_size!=0){
850
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
851
        return -1;
852
    }
853
    if (asf->packet_flags & 0x01) {
854
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
855
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
856
            if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
857
                av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
858
                return -1;
859
            } else {
860
                int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
861
                asf->packet_size_left += diff;
862
                asf->packet_padsize   -= diff;
863
            }
864
        }
865
        //printf("Fragsize %d\n", asf->packet_frag_size);
866
    } else {
867
        if (rsize > asf->packet_size_left) {
868
            av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
869
            return -1;
870
        }
871
        asf->packet_frag_size = asf->packet_size_left - rsize;
872
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
873
    }
874
    if (asf->packet_replic_size == 1) {
875
        asf->packet_multi_size = asf->packet_frag_size;
876
        if (asf->packet_multi_size > asf->packet_size_left)
877
            return -1;
878
    }
879
    asf->packet_size_left -= rsize;
880
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
881

    
882
    return 0;
883
}
884

    
885
/**
886
 * Parse data from individual ASF packets (which were previously loaded
887
 * with asf_get_packet()).
888
 * @param s demux context
889
 * @param pb context to read data from
890
 * @param pkt pointer to store packet data into
891
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
892
 *          packets need to be loaded (through asf_get_packet())
893
 */
894
static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
895
{
896
    ASFContext *asf = s->priv_data;
897
    ASFStream *asf_st = 0;
898
    for (;;) {
899
        int ret;
900
        if(pb->eof_reached)
901
            return AVERROR_EOF;
902
        if (asf->packet_size_left < FRAME_HEADER_SIZE
903
            || asf->packet_segments < 1) {
904
            //asf->packet_size_left <= asf->packet_padsize) {
905
            int ret = asf->packet_size_left + asf->packet_padsize;
906
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
907
            assert(ret>=0);
908
            /* fail safe */
909
            avio_skip(pb, ret);
910

    
911
            asf->packet_pos= avio_tell(pb);
912
            if (asf->data_object_size != (uint64_t)-1 &&
913
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
914
                return AVERROR_EOF; /* Do not exceed the size of the data object */
915
            return 1;
916
        }
917
        if (asf->packet_time_start == 0) {
918
            if(asf_read_frame_header(s, pb) < 0){
919
                asf->packet_segments= 0;
920
                continue;
921
            }
922
            if (asf->stream_index < 0
923
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
924
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
925
                ) {
926
                asf->packet_time_start = 0;
927
                /* unhandled packet (should not happen) */
928
                avio_skip(pb, asf->packet_frag_size);
929
                asf->packet_size_left -= asf->packet_frag_size;
930
                if(asf->stream_index < 0)
931
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
932
                continue;
933
            }
934
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
935
        }
936
        asf_st = asf->asf_st;
937

    
938
        if (asf->packet_replic_size == 1) {
939
            // frag_offset is here used as the beginning timestamp
940
            asf->packet_frag_timestamp = asf->packet_time_start;
941
            asf->packet_time_start += asf->packet_time_delta;
942
            asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
943
            asf->packet_size_left--;
944
            asf->packet_multi_size--;
945
            if (asf->packet_multi_size < asf->packet_obj_size)
946
            {
947
                asf->packet_time_start = 0;
948
                avio_skip(pb, asf->packet_multi_size);
949
                asf->packet_size_left -= asf->packet_multi_size;
950
                continue;
951
            }
952
            asf->packet_multi_size -= asf->packet_obj_size;
953
            //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);
954
        }
955
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
956
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
957
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
958
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
959
                asf_st->frag_offset, asf->packet_frag_size,
960
                asf->packet_obj_size, asf_st->pkt.size);
961
            asf->packet_obj_size= asf_st->pkt.size;
962
        }
963

    
964
        if (   asf_st->pkt.size != asf->packet_obj_size
965
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
966
            if(asf_st->pkt.data){
967
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
968
                asf_st->frag_offset = 0;
969
                av_free_packet(&asf_st->pkt);
970
            }
971
            /* new packet */
972
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
973
            asf_st->seq = asf->packet_seq;
974
            asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
975
            asf_st->pkt.stream_index = asf->stream_index;
976
            asf_st->pkt.pos =
977
            asf_st->packet_pos= asf->packet_pos;
978
            if (asf_st->pkt.data && asf_st->palette_changed) {
979
                uint8_t *pal;
980
                pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
981
                                              AVPALETTE_SIZE);
982
                if (!pal) {
983
                    av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
984
                } else {
985
                    memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
986
                    asf_st->palette_changed = 0;
987
                }
988
            }
989
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
990
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
991
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
992
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
993
                asf->packet_key_frame = 1;
994
            if (asf->packet_key_frame)
995
                asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
996
        }
997

    
998
        /* read data */
999
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
1000
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1001
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1002
        asf->packet_size_left -= asf->packet_frag_size;
1003
        if (asf->packet_size_left < 0)
1004
            continue;
1005

    
1006
        if(   asf->packet_frag_offset >= asf_st->pkt.size
1007
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
1008
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
1009
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
1010
            continue;
1011
        }
1012

    
1013
        ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1014
                         asf->packet_frag_size);
1015
        if (ret != asf->packet_frag_size) {
1016
            if (ret < 0 || asf->packet_frag_offset + ret == 0)
1017
                return ret < 0 ? ret : AVERROR_EOF;
1018
            if (asf_st->ds_span > 1) {
1019
                // scrambling, we can either drop it completely or fill the remainder
1020
                // TODO: should we fill the whole packet instead of just the current
1021
                // fragment?
1022
                memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1023
                       asf->packet_frag_size - ret);
1024
                ret = asf->packet_frag_size;
1025
            } else
1026
                // no scrambling, so we can return partial packets
1027
                av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1028
        }
1029
        if (s->key && s->keylen == 20)
1030
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1031
                            ret);
1032
        asf_st->frag_offset += ret;
1033
        /* test if whole packet is read */
1034
        if (asf_st->frag_offset == asf_st->pkt.size) {
1035
            //workaround for macroshit radio DVR-MS files
1036
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
1037
               && asf_st->pkt.size > 100){
1038
                int i;
1039
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
1040
                if(i == asf_st->pkt.size){
1041
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1042
                    asf_st->frag_offset = 0;
1043
                    av_free_packet(&asf_st->pkt);
1044
                    continue;
1045
                }
1046
            }
1047

    
1048
            /* return packet */
1049
            if (asf_st->ds_span > 1) {
1050
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
1051
                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
1052
              }else{
1053
                /* packet descrambling */
1054
                uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
1055
                if (newdata) {
1056
                    int offset = 0;
1057
                    memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1058
                    while (offset < asf_st->pkt.size) {
1059
                        int off = offset / asf_st->ds_chunk_size;
1060
                        int row = off / asf_st->ds_span;
1061
                        int col = off % asf_st->ds_span;
1062
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1063
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
1064

    
1065
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1066
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1067
                        memcpy(newdata + offset,
1068
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1069
                               asf_st->ds_chunk_size);
1070
                        offset += asf_st->ds_chunk_size;
1071
                    }
1072
                    av_free(asf_st->pkt.data);
1073
                    asf_st->pkt.data = newdata;
1074
                }
1075
              }
1076
            }
1077
            asf_st->frag_offset = 0;
1078
            *pkt= asf_st->pkt;
1079
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1080
            asf_st->pkt.size = 0;
1081
            asf_st->pkt.data = 0;
1082
            break; // packet completed
1083
        }
1084
    }
1085
    return 0;
1086
}
1087

    
1088
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1089
{
1090
    ASFContext *asf = s->priv_data;
1091

    
1092
    for (;;) {
1093
        int ret;
1094

    
1095
        /* parse cached packets, if any */
1096
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1097
            return ret;
1098
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1099
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1100
        asf->packet_time_start = 0;
1101
    }
1102

    
1103
    return 0;
1104
}
1105

    
1106
// Added to support seeking after packets have been read
1107
// If information is not reset, read_packet fails due to
1108
// leftover information from previous reads
1109
static void asf_reset_header(AVFormatContext *s)
1110
{
1111
    ASFContext *asf = s->priv_data;
1112
    ASFStream *asf_st;
1113
    int i;
1114

    
1115
    asf->packet_size_left = 0;
1116
    asf->packet_segments = 0;
1117
    asf->packet_flags = 0;
1118
    asf->packet_property = 0;
1119
    asf->packet_timestamp = 0;
1120
    asf->packet_segsizetype = 0;
1121
    asf->packet_segments = 0;
1122
    asf->packet_seq = 0;
1123
    asf->packet_replic_size = 0;
1124
    asf->packet_key_frame = 0;
1125
    asf->packet_padsize = 0;
1126
    asf->packet_frag_offset = 0;
1127
    asf->packet_frag_size = 0;
1128
    asf->packet_frag_timestamp = 0;
1129
    asf->packet_multi_size = 0;
1130
    asf->packet_obj_size = 0;
1131
    asf->packet_time_delta = 0;
1132
    asf->packet_time_start = 0;
1133

    
1134
    for(i=0; i<s->nb_streams; i++){
1135
        asf_st= s->streams[i]->priv_data;
1136
        av_free_packet(&asf_st->pkt);
1137
        asf_st->frag_offset=0;
1138
        asf_st->seq=0;
1139
    }
1140
    asf->asf_st= NULL;
1141
}
1142

    
1143
static int asf_read_close(AVFormatContext *s)
1144
{
1145
    asf_reset_header(s);
1146

    
1147
    return 0;
1148
}
1149

    
1150
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1151
{
1152
    AVPacket pkt1, *pkt = &pkt1;
1153
    ASFStream *asf_st;
1154
    int64_t pts;
1155
    int64_t pos= *ppos;
1156
    int i;
1157
    int64_t start_pos[ASF_MAX_STREAMS];
1158

    
1159
    for(i=0; i<s->nb_streams; i++){
1160
        start_pos[i]= pos;
1161
    }
1162

    
1163
    if (s->packet_size > 0)
1164
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1165
    *ppos= pos;
1166
    avio_seek(s->pb, pos, SEEK_SET);
1167

    
1168
//printf("asf_read_pts\n");
1169
    asf_reset_header(s);
1170
    for(;;){
1171
        if (av_read_frame(s, pkt) < 0){
1172
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1173
            return AV_NOPTS_VALUE;
1174
        }
1175

    
1176
        pts= pkt->pts;
1177

    
1178
        av_free_packet(pkt);
1179
        if(pkt->flags&AV_PKT_FLAG_KEY){
1180
            i= pkt->stream_index;
1181

    
1182
            asf_st= s->streams[i]->priv_data;
1183

    
1184
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1185
            pos= asf_st->packet_pos;
1186

    
1187
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1188
            start_pos[i]= asf_st->packet_pos + 1;
1189

    
1190
            if(pkt->stream_index == stream_index)
1191
               break;
1192
        }
1193
    }
1194

    
1195
    *ppos= pos;
1196
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1197

    
1198
    return pts;
1199
}
1200

    
1201
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1202
{
1203
    ff_asf_guid g;
1204
    ASFContext *asf = s->priv_data;
1205
    int64_t current_pos= avio_tell(s->pb);
1206
    int i;
1207

    
1208
    avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1209
    ff_get_guid(s->pb, &g);
1210

    
1211
    /* the data object can be followed by other top-level objects,
1212
       skip them until the simple index object is reached */
1213
    while (ff_guidcmp(&g, &index_guid)) {
1214
        int64_t gsize= avio_rl64(s->pb);
1215
        if (gsize < 24 || s->pb->eof_reached) {
1216
            avio_seek(s->pb, current_pos, SEEK_SET);
1217
            return;
1218
        }
1219
        avio_skip(s->pb, gsize-24);
1220
        ff_get_guid(s->pb, &g);
1221
    }
1222

    
1223
    {
1224
        int64_t itime, last_pos=-1;
1225
        int pct, ict;
1226
        int64_t av_unused gsize= avio_rl64(s->pb);
1227
        ff_get_guid(s->pb, &g);
1228
        itime=avio_rl64(s->pb);
1229
        pct=avio_rl32(s->pb);
1230
        ict=avio_rl32(s->pb);
1231
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1232

    
1233
        for (i=0;i<ict;i++){
1234
            int pktnum=avio_rl32(s->pb);
1235
            int pktct =avio_rl16(s->pb);
1236
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1237
            int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1238

    
1239
            if(pos != last_pos){
1240
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d  pts: %"PRId64"\n", pktnum, pktct, index_pts);
1241
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1242
            last_pos=pos;
1243
            }
1244
        }
1245
        asf->index_read= 1;
1246
    }
1247
    avio_seek(s->pb, current_pos, SEEK_SET);
1248
}
1249

    
1250
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1251
{
1252
    ASFContext *asf = s->priv_data;
1253
    AVStream *st = s->streams[stream_index];
1254
    int64_t pos;
1255
    int index;
1256

    
1257
    if (s->packet_size <= 0)
1258
        return -1;
1259

    
1260
    /* Try using the protocol's read_seek if available */
1261
    if(s->pb) {
1262
        int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1263
        if(ret >= 0)
1264
            asf_reset_header(s);
1265
        if (ret != AVERROR(ENOSYS))
1266
            return ret;
1267
    }
1268

    
1269
    if (!asf->index_read)
1270
        asf_build_simple_index(s, stream_index);
1271

    
1272
    if(!(asf->index_read && st->index_entries)){
1273
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1274
            return -1;
1275
    }else{
1276
        index= av_index_search_timestamp(st, pts, flags);
1277
        if(index<0)
1278
            return -1;
1279

    
1280
        /* find the position */
1281
        pos = st->index_entries[index].pos;
1282

    
1283
        /* do the seek */
1284
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1285
        avio_seek(s->pb, pos, SEEK_SET);
1286
    }
1287
    asf_reset_header(s);
1288
    return 0;
1289
}
1290

    
1291
AVInputFormat ff_asf_demuxer = {
1292
    "asf",
1293
    NULL_IF_CONFIG_SMALL("ASF format"),
1294
    sizeof(ASFContext),
1295
    asf_probe,
1296
    asf_read_header,
1297
    asf_read_packet,
1298
    asf_read_close,
1299
    asf_read_seek,
1300
    asf_read_pts,
1301
};