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ffmpeg / libavformat / asfdec.c @ 5ce73e23

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1
/*
2
 * ASF compatible demuxer
3
 * Copyright (c) 2000, 2001 Fabrice Bellard
4
 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; 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

    
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#include "libavutil/common.h"
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#include "libavcodec/mpegaudio.h"
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#include "avformat.h"
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#include "riff.h"
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#include "asf.h"
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#include "asfcrypt.h"
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void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
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#undef NDEBUG
32
#include <assert.h>
33

    
34
#define FRAME_HEADER_SIZE 17
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// Fix Me! FRAME_HEADER_SIZE may be different.
36

    
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static const ff_asf_guid index_guid = {
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    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
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};
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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
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};
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/**********************************/
45
/* decoding */
46

    
47
//#define DEBUG
48

    
49
#ifdef DEBUG
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#define PRINT_IF_GUID(g,cmp) \
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if (!guidcmp(g, &cmp)) \
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    dprintf(NULL, "(GUID: %s) ", #cmp)
53

    
54
static void print_guid(const ff_asf_guid *g)
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{
56
    int i;
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    PRINT_IF_GUID(g, ff_asf_header);
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    else PRINT_IF_GUID(g, ff_asf_file_header);
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    else PRINT_IF_GUID(g, ff_asf_stream_header);
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    else PRINT_IF_GUID(g, ff_asf_audio_stream);
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    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
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    else PRINT_IF_GUID(g, ff_asf_video_stream);
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    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
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    else PRINT_IF_GUID(g, ff_asf_command_stream);
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    else PRINT_IF_GUID(g, ff_asf_comment_header);
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    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
67
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
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    else PRINT_IF_GUID(g, ff_asf_data_header);
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    else PRINT_IF_GUID(g, index_guid);
70
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
71
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
72
    else PRINT_IF_GUID(g, ff_asf_my_guid);
73
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
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    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
75
    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
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    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
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    else PRINT_IF_GUID(g, ff_asf_metadata_header);
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    else PRINT_IF_GUID(g, stream_bitrate_guid);
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    else
80
        dprintf(NULL, "(GUID: unknown) ");
81
    for(i=0;i<16;i++)
82
        dprintf(NULL, " 0x%02x,", (*g)[i]);
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    dprintf(NULL, "}\n");
84
}
85
#undef PRINT_IF_GUID
86
#else
87
#define print_guid(g)
88
#endif
89

    
90
static int guidcmp(const void *g1, const void *g2)
91
{
92
    return memcmp(g1, g2, sizeof(ff_asf_guid));
93
}
94

    
95
static void get_guid(ByteIOContext *s, ff_asf_guid *g)
96
{
97
    assert(sizeof(*g) == 16);
98
    get_buffer(s, *g, sizeof(*g));
99
}
100

    
101
#if 0
102
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
103
{
104
    int len, c;
105
    char *q;
106

107
    len = get_le16(pb);
108
    q = buf;
109
    while (len > 0) {
110
        c = get_le16(pb);
111
        if ((q - buf) < buf_size - 1)
112
            *q++ = c;
113
        len--;
114
    }
115
    *q = '\0';
116
}
117
#endif
118

    
119
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
120
{
121
    char* q = buf;
122
    len /= 2;
123
    while (len--) {
124
        uint8_t tmp;
125
        PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
126
    }
127
    *q = '\0';
128
}
129

    
130
static int asf_probe(AVProbeData *pd)
131
{
132
    /* check file header */
133
    if (!guidcmp(pd->buf, &ff_asf_header))
134
        return AVPROBE_SCORE_MAX;
135
    else
136
        return 0;
137
}
138

    
139
static int get_value(ByteIOContext *pb, int type){
140
    switch(type){
141
        case 2: return get_le32(pb);
142
        case 3: return get_le32(pb);
143
        case 4: return get_le64(pb);
144
        case 5: return get_le16(pb);
145
        default:return INT_MIN;
146
    }
147
}
148

    
149
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
150
{
151
    char value[1024];
152
    if (type <= 1) {         // unicode or byte
153
        get_str16_nolen(s->pb, len, value, sizeof(value));
154
    } else if (type <= 5) {  // boolean or DWORD or QWORD or WORD
155
        uint64_t num = get_value(s->pb, type);
156
        snprintf(value, sizeof(value), "%"PRIu64, num);
157
    } else {
158
        url_fskip(s->pb, len);
159
        return;
160
    }
161
    if (!strncmp(key, "WM/", 3))
162
        key += 3;
163
    av_metadata_set(&s->metadata, key, value);
164
}
165

    
166
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
167
{
168
    ASFContext *asf = s->priv_data;
169
    ff_asf_guid g;
170
    ByteIOContext *pb = s->pb;
171
    AVStream *st;
172
    ASFStream *asf_st;
173
    int size, i;
174
    int64_t gsize;
175
    AVRational dar[128];
176
    uint32_t bitrate[128];
177

    
178
    memset(dar, 0, sizeof(dar));
179
    memset(bitrate, 0, sizeof(bitrate));
180

    
181
    get_guid(pb, &g);
182
    if (guidcmp(&g, &ff_asf_header))
183
        return -1;
184
    get_le64(pb);
185
    get_le32(pb);
186
    get_byte(pb);
187
    get_byte(pb);
188
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
189
    for(;;) {
190
        get_guid(pb, &g);
191
        gsize = get_le64(pb);
192
        dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
193
        print_guid(&g);
194
        dprintf(s, "  size=0x%"PRIx64"\n", gsize);
195
        if (!guidcmp(&g, &ff_asf_data_header)) {
196
            asf->data_object_offset = url_ftell(pb);
197
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
198
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
199
                asf->data_object_size = gsize - 24;
200
            } else {
201
                asf->data_object_size = (uint64_t)-1;
202
            }
203
            break;
204
        }
205
        if (gsize < 24)
206
            return -1;
207
        if (!guidcmp(&g, &ff_asf_file_header)) {
208
            get_guid(pb, &asf->hdr.guid);
209
            asf->hdr.file_size          = get_le64(pb);
210
            asf->hdr.create_time        = get_le64(pb);
211
            asf->nb_packets             = get_le64(pb);
212
            asf->hdr.play_time          = get_le64(pb);
213
            asf->hdr.send_time          = get_le64(pb);
214
            asf->hdr.preroll            = get_le32(pb);
215
            asf->hdr.ignore             = get_le32(pb);
216
            asf->hdr.flags              = get_le32(pb);
217
            asf->hdr.min_pktsize        = get_le32(pb);
218
            asf->hdr.max_pktsize        = get_le32(pb);
219
            asf->hdr.max_bitrate        = get_le32(pb);
220
            asf->packet_size = asf->hdr.max_pktsize;
221
        } else if (!guidcmp(&g, &ff_asf_stream_header)) {
222
            enum CodecType type;
223
            int type_specific_size, sizeX;
224
            uint64_t total_size;
225
            unsigned int tag1;
226
            int64_t pos1, pos2, start_time;
227
            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
228

    
229
            pos1 = url_ftell(pb);
230

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

    
241
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
242
                st->duration = asf->hdr.send_time /
243
                    (10000000 / 1000) - start_time;
244
            }
245
            get_guid(pb, &g);
246

    
247
            test_for_ext_stream_audio = 0;
248
            if (!guidcmp(&g, &ff_asf_audio_stream)) {
249
                type = CODEC_TYPE_AUDIO;
250
            } else if (!guidcmp(&g, &ff_asf_video_stream)) {
251
                type = CODEC_TYPE_VIDEO;
252
            } else if (!guidcmp(&g, &ff_asf_command_stream)) {
253
                type = CODEC_TYPE_DATA;
254
            } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
255
                test_for_ext_stream_audio = 1;
256
                type = CODEC_TYPE_UNKNOWN;
257
            } else {
258
                return -1;
259
            }
260
            get_guid(pb, &g);
261
            total_size = get_le64(pb);
262
            type_specific_size = get_le32(pb);
263
            get_le32(pb);
264
            st->id = get_le16(pb) & 0x7f; /* stream id */
265
            // mapping of asf ID to AV stream ID;
266
            asf->asfid2avid[st->id] = s->nb_streams - 1;
267

    
268
            get_le32(pb);
269

    
270
            if (test_for_ext_stream_audio) {
271
                get_guid(pb, &g);
272
                if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
273
                    type = CODEC_TYPE_AUDIO;
274
                    is_dvr_ms_audio=1;
275
                    get_guid(pb, &g);
276
                    get_le32(pb);
277
                    get_le32(pb);
278
                    get_le32(pb);
279
                    get_guid(pb, &g);
280
                    get_le32(pb);
281
                }
282
            }
283

    
284
            st->codec->codec_type = type;
285
            if (type == CODEC_TYPE_AUDIO) {
286
                get_wav_header(pb, st->codec, type_specific_size);
287
                if (is_dvr_ms_audio) {
288
                    // codec_id and codec_tag are unreliable in dvr_ms
289
                    // files. Set them later by probing stream.
290
                    st->codec->codec_id = CODEC_ID_PROBE;
291
                    st->codec->codec_tag = 0;
292
                }
293
                if (st->codec->codec_id == CODEC_ID_AAC) {
294
                    st->need_parsing = AVSTREAM_PARSE_NONE;
295
                } else {
296
                    st->need_parsing = AVSTREAM_PARSE_FULL;
297
                }
298
                /* We have to init the frame size at some point .... */
299
                pos2 = url_ftell(pb);
300
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
301
                    asf_st->ds_span = get_byte(pb);
302
                    asf_st->ds_packet_size = get_le16(pb);
303
                    asf_st->ds_chunk_size = get_le16(pb);
304
                    get_le16(pb); //ds_data_size
305
                    get_byte(pb); //ds_silence_data
306
                }
307
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
308
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
309
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
310
                if (asf_st->ds_span > 1) {
311
                    if (!asf_st->ds_chunk_size
312
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
313
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
314
                        asf_st->ds_span = 0; // disable descrambling
315
                }
316
                switch (st->codec->codec_id) {
317
                case CODEC_ID_MP3:
318
                    st->codec->frame_size = MPA_FRAME_SIZE;
319
                    break;
320
                case CODEC_ID_PCM_S16LE:
321
                case CODEC_ID_PCM_S16BE:
322
                case CODEC_ID_PCM_U16LE:
323
                case CODEC_ID_PCM_U16BE:
324
                case CODEC_ID_PCM_S8:
325
                case CODEC_ID_PCM_U8:
326
                case CODEC_ID_PCM_ALAW:
327
                case CODEC_ID_PCM_MULAW:
328
                    st->codec->frame_size = 1;
329
                    break;
330
                default:
331
                    /* This is probably wrong, but it prevents a crash later */
332
                    st->codec->frame_size = 1;
333
                    break;
334
                }
335
            } else if (type == CODEC_TYPE_VIDEO) {
336
                get_le32(pb);
337
                get_le32(pb);
338
                get_byte(pb);
339
                size = get_le16(pb); /* size */
340
                sizeX= get_le32(pb); /* size */
341
                st->codec->width = get_le32(pb);
342
                st->codec->height = get_le32(pb);
343
                /* not available for asf */
344
                get_le16(pb); /* panes */
345
                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
346
                tag1 = get_le32(pb);
347
                url_fskip(pb, 20);
348
//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
349
                size= sizeX;
350
                if (size > 40) {
351
                    st->codec->extradata_size = size - 40;
352
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
353
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
354
                }
355

    
356
                /* Extract palette from extradata if bpp <= 8 */
357
                /* This code assumes that extradata contains only palette */
358
                /* This is true for all paletted codecs implemented in ffmpeg */
359
                if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
360
                    st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
361
#ifdef WORDS_BIGENDIAN
362
                    for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
363
                        st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
364
#else
365
                    memcpy(st->codec->palctrl->palette, st->codec->extradata,
366
                           FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
367
#endif
368
                    st->codec->palctrl->palette_changed = 1;
369
                }
370

    
371
                st->codec->codec_tag = tag1;
372
                st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
373
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
374
                    st->need_parsing = AVSTREAM_PARSE_FULL;
375
            }
376
            pos2 = url_ftell(pb);
377
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
378
        } else if (!guidcmp(&g, &ff_asf_comment_header)) {
379
            int len1, len2, len3, len4, len5;
380

    
381
            len1 = get_le16(pb);
382
            len2 = get_le16(pb);
383
            len3 = get_le16(pb);
384
            len4 = get_le16(pb);
385
            len5 = get_le16(pb);
386
            get_tag(s, "title"    , 0, len1);
387
            get_tag(s, "author"   , 0, len2);
388
            get_tag(s, "copyright", 0, len3);
389
            get_tag(s, "comment"  , 0, len4);
390
            url_fskip(pb, len5);
391
        } else if (!guidcmp(&g, &stream_bitrate_guid)) {
392
            int stream_count = get_le16(pb);
393
            int j;
394

    
395
//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
396
//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
397
            for(j = 0; j < stream_count; j++) {
398
                int flags, bitrate, stream_id;
399

    
400
                flags= get_le16(pb);
401
                bitrate= get_le32(pb);
402
                stream_id= (flags & 0x7f);
403
//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
404
                asf->stream_bitrates[stream_id]= bitrate;
405
            }
406
        } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
407
            int desc_count, i;
408

    
409
            desc_count = get_le16(pb);
410
            for(i=0;i<desc_count;i++) {
411
                    int name_len,value_type,value_len;
412
                    char name[1024];
413

    
414
                    name_len = get_le16(pb);
415
                    get_str16_nolen(pb, name_len, name, sizeof(name));
416
                    value_type = get_le16(pb);
417
                    value_len  = get_le16(pb);
418
                    get_tag(s, name, value_type, value_len);
419
            }
420
        } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
421
            int n, stream_num, name_len, value_len, value_type, value_num;
422
            n = get_le16(pb);
423

    
424
            for(i=0;i<n;i++) {
425
                char name[1024];
426

    
427
                get_le16(pb); //lang_list_index
428
                stream_num= get_le16(pb);
429
                name_len=   get_le16(pb);
430
                value_type= get_le16(pb);
431
                value_len=  get_le32(pb);
432

    
433
                get_str16_nolen(pb, name_len, name, sizeof(name));
434
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
435
                value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
436
                url_fskip(pb, value_len - 2);
437

    
438
                if(stream_num<128){
439
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
440
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
441
                }
442
            }
443
        } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
444
            int ext_len, payload_ext_ct, stream_ct;
445
            uint32_t ext_d, leak_rate, stream_num;
446

    
447
            get_le64(pb); // starttime
448
            get_le64(pb); // endtime
449
            leak_rate = get_le32(pb); // leak-datarate
450
            get_le32(pb); // bucket-datasize
451
            get_le32(pb); // init-bucket-fullness
452
            get_le32(pb); // alt-leak-datarate
453
            get_le32(pb); // alt-bucket-datasize
454
            get_le32(pb); // alt-init-bucket-fullness
455
            get_le32(pb); // max-object-size
456
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
457
            stream_num = get_le16(pb); // stream-num
458
            get_le16(pb); // stream-language-id-index
459
            get_le64(pb); // avg frametime in 100ns units
460
            stream_ct = get_le16(pb); //stream-name-count
461
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
462

    
463
            if (stream_num < 128)
464
                bitrate[stream_num] = leak_rate;
465

    
466
            for (i=0; i<stream_ct; i++){
467
                get_le16(pb);
468
                ext_len = get_le16(pb);
469
                url_fseek(pb, ext_len, SEEK_CUR);
470
            }
471

    
472
            for (i=0; i<payload_ext_ct; i++){
473
                get_guid(pb, &g);
474
                ext_d=get_le16(pb);
475
                ext_len=get_le32(pb);
476
                url_fseek(pb, ext_len, SEEK_CUR);
477
            }
478

    
479
            // there could be a optional stream properties object to follow
480
            // if so the next iteration will pick it up
481
        } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
482
            int v1, v2;
483
            get_guid(pb, &g);
484
            v1 = get_le32(pb);
485
            v2 = get_le16(pb);
486
#if 0
487
        } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
488
            int len, v1, n, num;
489
            char str[256], *q;
490
            char tag[16];
491

492
            get_guid(pb, &g);
493
            print_guid(&g);
494

495
            n = get_le32(pb);
496
            for(i=0;i<n;i++) {
497
                num = get_le16(pb); /* stream number */
498
                get_str16(pb, str, sizeof(str));
499
                get_str16(pb, str, sizeof(str));
500
                len = get_le16(pb);
501
                q = tag;
502
                while (len > 0) {
503
                    v1 = get_byte(pb);
504
                    if ((q - tag) < sizeof(tag) - 1)
505
                        *q++ = v1;
506
                    len--;
507
                }
508
                *q = '\0';
509
            }
510
#endif
511
        } else if (url_feof(pb)) {
512
            return -1;
513
        } else {
514
            url_fseek(pb, gsize - 24, SEEK_CUR);
515
        }
516
    }
517
    get_guid(pb, &g);
518
    get_le64(pb);
519
    get_byte(pb);
520
    get_byte(pb);
521
    if (url_feof(pb))
522
        return -1;
523
    asf->data_offset = url_ftell(pb);
524
    asf->packet_size_left = 0;
525

    
526

    
527
    for(i=0; i<128; i++){
528
        int stream_num= asf->asfid2avid[i];
529
        if(stream_num>=0){
530
            AVStream *st = s->streams[stream_num];
531
            if (!st->codec->bit_rate)
532
                st->codec->bit_rate = bitrate[i];
533
            if (dar[i].num > 0 && dar[i].den > 0)
534
                av_reduce(&st->sample_aspect_ratio.num,
535
                          &st->sample_aspect_ratio.den,
536
                          dar[i].num, dar[i].den, INT_MAX);
537
//av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
538
        }
539
    }
540

    
541
    return 0;
542
}
543

    
544
#define DO_2BITS(bits, var, defval) \
545
    switch (bits & 3) \
546
    { \
547
    case 3: var = get_le32(pb); rsize += 4; break; \
548
    case 2: var = get_le16(pb); rsize += 2; break; \
549
    case 1: var = get_byte(pb); rsize++; break; \
550
    default: var = defval; break; \
551
    }
552

    
553
int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
554
{
555
    ASFContext *asf = s->priv_data;
556
    uint32_t packet_length, padsize;
557
    int rsize = 8;
558
    int c, d, e, off;
559

    
560
    off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
561

    
562
    c=d=e=-1;
563
    while(off-- > 0){
564
        c=d; d=e;
565
        e= get_byte(pb);
566
        if(c == 0x82 && !d && !e)
567
            break;
568
    }
569

    
570
    if (c != 0x82) {
571
        if (!url_feof(pb))
572
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
573
    }
574
    if ((c & 0x8f) == 0x82) {
575
        if (d || e) {
576
            if (!url_feof(pb))
577
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
578
            return -1;
579
        }
580
        c= get_byte(pb);
581
        d= get_byte(pb);
582
        rsize+=3;
583
    }else{
584
        url_fseek(pb, -1, SEEK_CUR); //FIXME
585
    }
586

    
587
    asf->packet_flags    = c;
588
    asf->packet_property = d;
589

    
590
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
591
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
592
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
593

    
594
    //the following checks prevent overflows and infinite loops
595
    if(packet_length >= (1U<<29)){
596
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
597
        return -1;
598
    }
599
    if(padsize >= packet_length){
600
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
601
        return -1;
602
    }
603

    
604
    asf->packet_timestamp = get_le32(pb);
605
    get_le16(pb); /* duration */
606
    // rsize has at least 11 bytes which have to be present
607

    
608
    if (asf->packet_flags & 0x01) {
609
        asf->packet_segsizetype = get_byte(pb); rsize++;
610
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
611
    } else {
612
        asf->packet_segments = 1;
613
        asf->packet_segsizetype = 0x80;
614
    }
615
    asf->packet_size_left = packet_length - padsize - rsize;
616
    if (packet_length < asf->hdr.min_pktsize)
617
        padsize += asf->hdr.min_pktsize - packet_length;
618
    asf->packet_padsize = padsize;
619
    dprintf(s, "packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
620
    return 0;
621
}
622

    
623
/**
624
 *
625
 * @return <0 if error
626
 */
627
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
628
    ASFContext *asf = s->priv_data;
629
    int rsize = 1;
630
    int num = get_byte(pb);
631
    int64_t ts0, ts1;
632

    
633
    asf->packet_segments--;
634
    asf->packet_key_frame = num >> 7;
635
    asf->stream_index = asf->asfid2avid[num & 0x7f];
636
    // sequence should be ignored!
637
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
638
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
639
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
640
//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);
641
    if (asf->packet_replic_size >= 8) {
642
        asf->packet_obj_size = get_le32(pb);
643
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
644
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
645
            return -1;
646
        }
647
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
648
        if(asf->packet_replic_size >= 8+38+4){
649
//            for(i=0; i<asf->packet_replic_size-8; i++)
650
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
651
//            av_log(s, AV_LOG_DEBUG, "\n");
652
            url_fskip(pb, 10);
653
            ts0= get_le64(pb);
654
            ts1= get_le64(pb);
655
            url_fskip(pb, 12);
656
            get_le32(pb);
657
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
658
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
659
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
660
        }else
661
            url_fskip(pb, asf->packet_replic_size - 8);
662
        rsize += asf->packet_replic_size; // FIXME - check validity
663
    } else if (asf->packet_replic_size==1){
664
        // multipacket - frag_offset is beginning timestamp
665
        asf->packet_time_start = asf->packet_frag_offset;
666
        asf->packet_frag_offset = 0;
667
        asf->packet_frag_timestamp = asf->packet_timestamp;
668

    
669
        asf->packet_time_delta = get_byte(pb);
670
        rsize++;
671
    }else if(asf->packet_replic_size!=0){
672
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
673
        return -1;
674
    }
675
    if (asf->packet_flags & 0x01) {
676
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
677
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
678
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
679
            return -1;
680
        }
681
        //printf("Fragsize %d\n", asf->packet_frag_size);
682
    } else {
683
        asf->packet_frag_size = asf->packet_size_left - rsize;
684
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
685
    }
686
    if (asf->packet_replic_size == 1) {
687
        asf->packet_multi_size = asf->packet_frag_size;
688
        if (asf->packet_multi_size > asf->packet_size_left)
689
            return -1;
690
    }
691
    asf->packet_size_left -= rsize;
692
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
693

    
694
    return 0;
695
}
696

    
697
int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
698
{
699
    ASFContext *asf = s->priv_data;
700
    ASFStream *asf_st = 0;
701
    for (;;) {
702
        if(url_feof(pb))
703
            return AVERROR_EOF;
704
        if (asf->packet_size_left < FRAME_HEADER_SIZE
705
            || asf->packet_segments < 1) {
706
            //asf->packet_size_left <= asf->packet_padsize) {
707
            int ret = asf->packet_size_left + asf->packet_padsize;
708
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
709
            assert(ret>=0);
710
            /* fail safe */
711
            url_fskip(pb, ret);
712

    
713
            asf->packet_pos= url_ftell(pb);
714
            if (asf->data_object_size != (uint64_t)-1 &&
715
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
716
                return AVERROR_EOF; /* Do not exceed the size of the data object */
717
            return 1;
718
        }
719
        if (asf->packet_time_start == 0) {
720
            if(asf_read_frame_header(s, pb) < 0){
721
                asf->packet_segments= 0;
722
                continue;
723
            }
724
            if (asf->stream_index < 0
725
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
726
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
727
                ) {
728
                asf->packet_time_start = 0;
729
                /* unhandled packet (should not happen) */
730
                url_fskip(pb, asf->packet_frag_size);
731
                asf->packet_size_left -= asf->packet_frag_size;
732
                if(asf->stream_index < 0)
733
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
734
                continue;
735
            }
736
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
737
        }
738
        asf_st = asf->asf_st;
739

    
740
        if (asf->packet_replic_size == 1) {
741
            // frag_offset is here used as the beginning timestamp
742
            asf->packet_frag_timestamp = asf->packet_time_start;
743
            asf->packet_time_start += asf->packet_time_delta;
744
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
745
            asf->packet_size_left--;
746
            asf->packet_multi_size--;
747
            if (asf->packet_multi_size < asf->packet_obj_size)
748
            {
749
                asf->packet_time_start = 0;
750
                url_fskip(pb, asf->packet_multi_size);
751
                asf->packet_size_left -= asf->packet_multi_size;
752
                continue;
753
            }
754
            asf->packet_multi_size -= asf->packet_obj_size;
755
            //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);
756
        }
757
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
758
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
759
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
760
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
761
                asf_st->frag_offset, asf->packet_frag_size,
762
                asf->packet_obj_size, asf_st->pkt.size);
763
            asf->packet_obj_size= asf_st->pkt.size;
764
        }
765

    
766
        if (   asf_st->pkt.size != asf->packet_obj_size
767
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
768
            if(asf_st->pkt.data){
769
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
770
                asf_st->frag_offset = 0;
771
                av_free_packet(&asf_st->pkt);
772
            }
773
            /* new packet */
774
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
775
            asf_st->seq = asf->packet_seq;
776
            asf_st->pkt.dts = asf->packet_frag_timestamp;
777
            asf_st->pkt.stream_index = asf->stream_index;
778
            asf_st->pkt.pos =
779
            asf_st->packet_pos= asf->packet_pos;
780
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
781
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
782
//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
783
            if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
784
                asf->packet_key_frame = 1;
785
            if (asf->packet_key_frame)
786
                asf_st->pkt.flags |= PKT_FLAG_KEY;
787
        }
788

    
789
        /* read data */
790
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
791
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
792
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
793
        asf->packet_size_left -= asf->packet_frag_size;
794
        if (asf->packet_size_left < 0)
795
            continue;
796

    
797
        if(   asf->packet_frag_offset >= asf_st->pkt.size
798
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
799
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
800
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
801
            continue;
802
        }
803

    
804
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
805
                   asf->packet_frag_size);
806
        if (s->key && s->keylen == 20)
807
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
808
                            asf->packet_frag_size);
809
        asf_st->frag_offset += asf->packet_frag_size;
810
        /* test if whole packet is read */
811
        if (asf_st->frag_offset == asf_st->pkt.size) {
812
            //workaround for macroshit radio DVR-MS files
813
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
814
               && asf_st->pkt.size > 100){
815
                int i;
816
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
817
                if(i == asf_st->pkt.size){
818
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
819
                    asf_st->frag_offset = 0;
820
                    av_free_packet(&asf_st->pkt);
821
                    continue;
822
                }
823
            }
824

    
825
            /* return packet */
826
            if (asf_st->ds_span > 1) {
827
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
828
                    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);
829
              }else{
830
                /* packet descrambling */
831
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
832
                if (newdata) {
833
                    int offset = 0;
834
                    while (offset < asf_st->pkt.size) {
835
                        int off = offset / asf_st->ds_chunk_size;
836
                        int row = off / asf_st->ds_span;
837
                        int col = off % asf_st->ds_span;
838
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
839
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
840

    
841
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
842
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
843
                        memcpy(newdata + offset,
844
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
845
                               asf_st->ds_chunk_size);
846
                        offset += asf_st->ds_chunk_size;
847
                    }
848
                    av_free(asf_st->pkt.data);
849
                    asf_st->pkt.data = newdata;
850
                }
851
              }
852
            }
853
            asf_st->frag_offset = 0;
854
            *pkt= asf_st->pkt;
855
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
856
            asf_st->pkt.size = 0;
857
            asf_st->pkt.data = 0;
858
            break; // packet completed
859
        }
860
    }
861
    return 0;
862
}
863

    
864
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
865
{
866
    ASFContext *asf = s->priv_data;
867

    
868
    for (;;) {
869
        int ret;
870

    
871
        /* parse cached packets, if any */
872
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
873
            return ret;
874
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
875
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
876
        asf->packet_time_start = 0;
877
    }
878

    
879
    return 0;
880
}
881

    
882
// Added to support seeking after packets have been read
883
// If information is not reset, read_packet fails due to
884
// leftover information from previous reads
885
static void asf_reset_header(AVFormatContext *s)
886
{
887
    ASFContext *asf = s->priv_data;
888
    ASFStream *asf_st;
889
    int i;
890

    
891
    asf->packet_nb_frames = 0;
892
    asf->packet_size_left = 0;
893
    asf->packet_segments = 0;
894
    asf->packet_flags = 0;
895
    asf->packet_property = 0;
896
    asf->packet_timestamp = 0;
897
    asf->packet_segsizetype = 0;
898
    asf->packet_segments = 0;
899
    asf->packet_seq = 0;
900
    asf->packet_replic_size = 0;
901
    asf->packet_key_frame = 0;
902
    asf->packet_padsize = 0;
903
    asf->packet_frag_offset = 0;
904
    asf->packet_frag_size = 0;
905
    asf->packet_frag_timestamp = 0;
906
    asf->packet_multi_size = 0;
907
    asf->packet_obj_size = 0;
908
    asf->packet_time_delta = 0;
909
    asf->packet_time_start = 0;
910

    
911
    for(i=0; i<s->nb_streams; i++){
912
        asf_st= s->streams[i]->priv_data;
913
        av_free_packet(&asf_st->pkt);
914
        asf_st->frag_offset=0;
915
        asf_st->seq=0;
916
    }
917
    asf->asf_st= NULL;
918
}
919

    
920
static int asf_read_close(AVFormatContext *s)
921
{
922
    int i;
923

    
924
    asf_reset_header(s);
925
    for(i=0;i<s->nb_streams;i++) {
926
        AVStream *st = s->streams[i];
927
        av_free(st->codec->palctrl);
928
    }
929
    return 0;
930
}
931

    
932
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
933
{
934
    ASFContext *asf = s->priv_data;
935
    AVPacket pkt1, *pkt = &pkt1;
936
    ASFStream *asf_st;
937
    int64_t pts;
938
    int64_t pos= *ppos;
939
    int i;
940
    int64_t start_pos[s->nb_streams];
941

    
942
    for(i=0; i<s->nb_streams; i++){
943
        start_pos[i]= pos;
944
    }
945

    
946
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
947
    *ppos= pos;
948
    url_fseek(s->pb, pos, SEEK_SET);
949

    
950
//printf("asf_read_pts\n");
951
    asf_reset_header(s);
952
    for(;;){
953
        if (av_read_frame(s, pkt) < 0){
954
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
955
            return AV_NOPTS_VALUE;
956
        }
957

    
958
        pts= pkt->pts;
959

    
960
        av_free_packet(pkt);
961
        if(pkt->flags&PKT_FLAG_KEY){
962
            i= pkt->stream_index;
963

    
964
            asf_st= s->streams[i]->priv_data;
965

    
966
//            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
967
            pos= asf_st->packet_pos;
968

    
969
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
970
            start_pos[i]= asf_st->packet_pos + 1;
971

    
972
            if(pkt->stream_index == stream_index)
973
               break;
974
        }
975
    }
976

    
977
    *ppos= pos;
978
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
979

    
980
    return pts;
981
}
982

    
983
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
984
{
985
    ff_asf_guid g;
986
    ASFContext *asf = s->priv_data;
987
    int64_t current_pos= url_ftell(s->pb);
988
    int i;
989

    
990
    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
991
    get_guid(s->pb, &g);
992
    if (!guidcmp(&g, &index_guid)) {
993
        int64_t itime;
994
        int pct, ict;
995
        int64_t gsize= get_le64(s->pb);
996
        get_guid(s->pb, &g);
997
        itime=get_le64(s->pb);
998
        pct=get_le32(s->pb);
999
        ict=get_le32(s->pb);
1000
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1001

    
1002
        for (i=0;i<ict;i++){
1003
            int pktnum=get_le32(s->pb);
1004
            int pktct =get_le16(s->pb);
1005
            int64_t pos      = s->data_offset + asf->packet_size*(int64_t)pktnum;
1006
            int64_t index_pts= av_rescale(itime, i, 10000);
1007

    
1008
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1009
            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1010
        }
1011
        asf->index_read= 1;
1012
    }
1013
    url_fseek(s->pb, current_pos, SEEK_SET);
1014
}
1015

    
1016
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1017
{
1018
    ASFContext *asf = s->priv_data;
1019
    AVStream *st = s->streams[stream_index];
1020
    int64_t pos;
1021
    int index;
1022

    
1023
    if (asf->packet_size <= 0)
1024
        return -1;
1025

    
1026
    /* Try using the protocol's read_seek if available */
1027
    if(s->pb) {
1028
        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1029
        if(ret >= 0)
1030
            asf_reset_header(s);
1031
        if (ret != AVERROR(ENOSYS))
1032
            return ret;
1033
    }
1034

    
1035
    if (!asf->index_read)
1036
        asf_build_simple_index(s, stream_index);
1037

    
1038
    if(!(asf->index_read && st->index_entries)){
1039
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1040
            return -1;
1041
    }else{
1042
        index= av_index_search_timestamp(st, pts, flags);
1043
        if(index<0)
1044
            return -1;
1045

    
1046
        /* find the position */
1047
        pos = st->index_entries[index].pos;
1048

    
1049
    // various attempts to find key frame have failed so far
1050
    //    asf_reset_header(s);
1051
    //    url_fseek(s->pb, pos, SEEK_SET);
1052
    //    key_pos = pos;
1053
    //     for(i=0;i<16;i++){
1054
    //         pos = url_ftell(s->pb);
1055
    //         if (av_read_frame(s, &pkt) < 0){
1056
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1057
    //             return -1;
1058
    //         }
1059
    //         asf_st = s->streams[stream_index]->priv_data;
1060
    //         pos += st->parser->frame_offset;
1061
    //
1062
    //         if (pkt.size > b) {
1063
    //             b = pkt.size;
1064
    //             key_pos = pos;
1065
    //         }
1066
    //
1067
    //         av_free_packet(&pkt);
1068
    //     }
1069

    
1070
        /* do the seek */
1071
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1072
        url_fseek(s->pb, pos, SEEK_SET);
1073
    }
1074
    asf_reset_header(s);
1075
    return 0;
1076
}
1077

    
1078
AVInputFormat asf_demuxer = {
1079
    "asf",
1080
    NULL_IF_CONFIG_SMALL("ASF format"),
1081
    sizeof(ASFContext),
1082
    asf_probe,
1083
    asf_read_header,
1084
    asf_read_packet,
1085
    asf_read_close,
1086
    asf_read_seek,
1087
    asf_read_pts,
1088
    .metadata_conv = ff_asf_metadata_conv,
1089
};