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ffmpeg / libavformat / asf-enc.c @ 0d9f8633

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1
/*
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 * Adaptive stream format muxer
3
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4
 *
5
 * 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
#include "avformat.h"
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#include "riff.h"
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#include "asf.h"
24

    
25
#undef NDEBUG
26
#include <assert.h>
27

    
28

    
29
#define ASF_INDEXED_INTERVAL    10000000
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#define ASF_INDEX_BLOCK         600
31

    
32
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
33
#define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
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                ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
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                ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
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                )
37

    
38
#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
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#   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
40
#else
41
#   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
42
#endif
43

    
44
#define ASF_PPI_PROPERTY_FLAGS (\
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                ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
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                ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
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                ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
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                ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
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                )
50

    
51
#define ASF_PPI_LENGTH_TYPE_FLAGS 0
52

    
53
#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
54

    
55
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
56
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 1
57
#endif
58
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
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#   define ASF_PPI_SEQUENCE_FIELD_SIZE 2
60
#endif
61
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
62
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 4
63
#endif
64
#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
65
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 0
66
#endif
67

    
68

    
69
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
70
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
71
#endif
72
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
73
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
74
#endif
75
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
76
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
77
#endif
78
#ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
79
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
80
#endif
81

    
82
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
83
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
84
#endif
85
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
86
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
87
#endif
88
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
89
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
90
#endif
91
#ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
92
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
93
#endif
94

    
95
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
96
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
97
#endif
98
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
99
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
100
#endif
101
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
102
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
103
#endif
104
#ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
105
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
106
#endif
107

    
108
#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
109
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
110
#endif
111
#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
112
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
113
#endif
114
#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
115
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
116
#endif
117
#ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
118
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
119
#endif
120

    
121
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
122
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
123
#endif
124
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
125
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
126
#endif
127
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
128
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
129
#endif
130
#ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
131
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
132
#endif
133

    
134
#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
135
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
136
#endif
137
#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
138
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
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#endif
140
#ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
141
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
142
#endif
143

    
144
#define PACKET_HEADER_MIN_SIZE (\
145
                ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
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                ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
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                1 + /*Length Type Flags*/ \
148
                1 + /*Property Flags*/ \
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                ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
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                ASF_PPI_SEQUENCE_FIELD_SIZE + \
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                ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
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                4 + /*Send Time Field*/ \
153
                2   /*Duration Field*/ \
154
                )
155

    
156

    
157
// Replicated Data shall be at least 8 bytes long.
158
#define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
159

    
160
#define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
161
                1 + /*Stream Number*/ \
162
                ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
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                ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
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                ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
165
                ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
166
                )
167

    
168
#define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
169
                1 + /*Stream Number*/ \
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                ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
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                ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
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                ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
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                ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
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                ASF_PAYLOAD_LENGTH_FIELD_SIZE \
175
                )
176

    
177
#define SINGLE_PAYLOAD_DATA_LENGTH (\
178
                PACKET_SIZE - \
179
                PACKET_HEADER_MIN_SIZE - \
180
                PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
181
                )
182

    
183
#define MULTI_PAYLOAD_CONSTANT (\
184
                PACKET_SIZE - \
185
                PACKET_HEADER_MIN_SIZE - \
186
                1 - /*Payload Flags*/ \
187
                2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
188
                )
189

    
190
static const AVCodecTag codec_asf_bmp_tags[] = {
191
    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
192
    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
193
    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
194
    { CODEC_ID_NONE, 0 },
195
};
196

    
197
static int preroll_time = 2000;
198

    
199
static const uint8_t error_spread_ADPCM_G726[] = { 0x01, 0x90, 0x01, 0x90, 0x01, 0x01, 0x00, 0x00 };
200

    
201
static void put_guid(ByteIOContext *s, const GUID *g)
202
{
203
    assert(sizeof(*g) == 16);
204
    put_buffer(s, g, sizeof(*g));
205
}
206

    
207
static void put_str16_nolen(ByteIOContext *s, const char *tag);
208
static void put_str16(ByteIOContext *s, const char *tag)
209
{
210
    put_le16(s,strlen(tag) + 1);
211
    put_str16_nolen(s, tag);
212
}
213

    
214
static void put_str16_nolen(ByteIOContext *s, const char *tag)
215
{
216
    int c;
217

    
218
    do{
219
        c = (uint8_t)*tag++;
220
        put_le16(s, c);
221
    }while(c);
222
}
223

    
224
static int64_t put_header(ByteIOContext *pb, const GUID *g)
225
{
226
    int64_t pos;
227

    
228
    pos = url_ftell(pb);
229
    put_guid(pb, g);
230
    put_le64(pb, 24);
231
    return pos;
232
}
233

    
234
/* update header size */
235
static void end_header(ByteIOContext *pb, int64_t pos)
236
{
237
    int64_t pos1;
238

    
239
    pos1 = url_ftell(pb);
240
    url_fseek(pb, pos + 16, SEEK_SET);
241
    put_le64(pb, pos1 - pos);
242
    url_fseek(pb, pos1, SEEK_SET);
243
}
244

    
245
/* write an asf chunk (only used in streaming case) */
246
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
247
{
248
    ASFContext *asf = s->priv_data;
249
    ByteIOContext *pb = &s->pb;
250
    int length;
251

    
252
    length = payload_length + 8;
253
    put_le16(pb, type);
254
    put_le16(pb, length);    //size
255
    put_le32(pb, asf->seqno);//sequence number
256
    put_le16(pb, flags); /* unknown bytes */
257
    put_le16(pb, length);    //size_confirm
258
    asf->seqno++;
259
}
260

    
261
/* convert from unix to windows time */
262
static int64_t unix_to_file_time(int ti)
263
{
264
    int64_t t;
265

    
266
    t = ti * INT64_C(10000000);
267
    t += INT64_C(116444736000000000);
268
    return t;
269
}
270

    
271
/* write the header (used two times if non streamed) */
272
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
273
{
274
    ASFContext *asf = s->priv_data;
275
    ByteIOContext *pb = &s->pb;
276
    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
277
    int has_title;
278
    AVCodecContext *enc;
279
    int64_t header_offset, cur_pos, hpos;
280
    int bit_rate;
281
    int64_t duration;
282

    
283
    duration = asf->duration + preroll_time * 10000;
284
    has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
285

    
286
    bit_rate = 0;
287
    for(n=0;n<s->nb_streams;n++) {
288
        enc = s->streams[n]->codec;
289

    
290
        av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
291

    
292
        bit_rate += enc->bit_rate;
293
    }
294

    
295
    if (asf->is_streamed) {
296
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
297
    }
298

    
299
    put_guid(pb, &asf_header);
300
    put_le64(pb, -1); /* header length, will be patched after */
301
    put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
302
    put_byte(pb, 1); /* ??? */
303
    put_byte(pb, 2); /* ??? */
304

    
305
    /* file header */
306
    header_offset = url_ftell(pb);
307
    hpos = put_header(pb, &file_header);
308
    put_guid(pb, &my_guid);
309
    put_le64(pb, file_size);
310
    file_time = 0;
311
    put_le64(pb, unix_to_file_time(file_time));
312
    put_le64(pb, asf->nb_packets); /* number of packets */
313
    put_le64(pb, duration); /* end time stamp (in 100ns units) */
314
    put_le64(pb, duration); /* duration (in 100ns units) */
315
    put_le32(pb, preroll_time); /* start time stamp */
316
    put_le32(pb, 0); /* ??? */
317
    put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
318
    put_le32(pb, asf->packet_size); /* packet size */
319
    put_le32(pb, asf->packet_size); /* packet size */
320
    put_le32(pb, bit_rate); /* Nominal data rate in bps */
321
    end_header(pb, hpos);
322

    
323
    /* unknown headers */
324
    hpos = put_header(pb, &head1_guid);
325
    put_guid(pb, &head2_guid);
326
    put_le32(pb, 6);
327
    put_le16(pb, 0);
328
    end_header(pb, hpos);
329

    
330
    /* title and other infos */
331
    if (has_title) {
332
        hpos = put_header(pb, &comment_header);
333
        if ( s->title[0]     ) { put_le16(pb, 2 * (strlen(s->title    ) + 1)); } else { put_le16(pb, 0); }
334
        if ( s->author[0]    ) { put_le16(pb, 2 * (strlen(s->author   ) + 1)); } else { put_le16(pb, 0); }
335
        if ( s->copyright[0] ) { put_le16(pb, 2 * (strlen(s->copyright) + 1)); } else { put_le16(pb, 0); }
336
        if ( s->comment[0]   ) { put_le16(pb, 2 * (strlen(s->comment  ) + 1)); } else { put_le16(pb, 0); }
337
        put_le16(pb, 0);
338
        if ( s->title[0]     ) put_str16_nolen(pb, s->title);
339
        if ( s->author[0]    ) put_str16_nolen(pb, s->author);
340
        if ( s->copyright[0] ) put_str16_nolen(pb, s->copyright);
341
        if ( s->comment[0]   ) put_str16_nolen(pb, s->comment);
342
        end_header(pb, hpos);
343
    }
344

    
345
    /* stream headers */
346
    for(n=0;n<s->nb_streams;n++) {
347
        int64_t es_pos;
348
        const uint8_t *er_spr = NULL;
349
        int er_spr_len = 0;
350
        //        ASFStream *stream = &asf->streams[n];
351

    
352
        enc = s->streams[n]->codec;
353
        asf->streams[n].num = n + 1;
354
        asf->streams[n].seq = 0;
355

    
356

    
357
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
358
            if (enc->codec_id == CODEC_ID_ADPCM_G726) {
359
                er_spr     = error_spread_ADPCM_G726;
360
                er_spr_len = sizeof(error_spread_ADPCM_G726);
361
            }
362
        }
363

    
364
        switch(enc->codec_type) {
365
        case CODEC_TYPE_AUDIO:
366
            wav_extra_size = 0;
367
            extra_size = 18 + wav_extra_size;
368
            extra_size2 = er_spr_len;
369
            break;
370
        default:
371
        case CODEC_TYPE_VIDEO:
372
            wav_extra_size = enc->extradata_size;
373
            extra_size = 0x33 + wav_extra_size;
374
            extra_size2 = 0;
375
            break;
376
        }
377

    
378
        hpos = put_header(pb, &stream_header);
379
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
380
            put_guid(pb, &audio_stream);
381
            if ((er_spr != NULL) && (er_spr_len != 0)) {
382
                put_guid(pb, &audio_conceal_spread);
383
            } else {
384
                put_guid(pb, &video_conceal_none);
385
            }
386
        } else {
387
            put_guid(pb, &video_stream);
388
            put_guid(pb, &video_conceal_none);
389
        }
390
        put_le64(pb, 0); /* ??? */
391
        es_pos = url_ftell(pb);
392
        put_le32(pb, extra_size); /* wav header len */
393
        put_le32(pb, extra_size2); /* additional data len */
394
        put_le16(pb, n + 1); /* stream number */
395
        put_le32(pb, 0); /* ??? */
396

    
397
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
398
            /* WAVEFORMATEX header */
399
            int wavsize = put_wav_header(pb, enc);
400
            if ((enc->codec_id != CODEC_ID_MP3) && (enc->codec_id != CODEC_ID_MP2) && (enc->codec_id != CODEC_ID_ADPCM_IMA_WAV) && (enc->extradata_size==0)) {
401
                wavsize += 2;
402
                put_le16(pb, 0);
403
            }
404

    
405
            if (wavsize < 0)
406
                return -1;
407
            if (wavsize != extra_size) {
408
                cur_pos = url_ftell(pb);
409
                url_fseek(pb, es_pos, SEEK_SET);
410
                put_le32(pb, wavsize); /* wav header len */
411
                url_fseek(pb, cur_pos, SEEK_SET);
412
            }
413
            /* ERROR Correction */
414
            if ((er_spr != NULL) && (er_spr_len != 0))
415
                put_buffer(pb, er_spr, er_spr_len);
416
        } else {
417
            put_le32(pb, enc->width);
418
            put_le32(pb, enc->height);
419
            put_byte(pb, 2); /* ??? */
420
            put_le16(pb, 40 + enc->extradata_size); /* size */
421

    
422
            /* BITMAPINFOHEADER header */
423
            put_bmp_header(pb, enc, codec_bmp_tags, 1);
424
        }
425
        end_header(pb, hpos);
426
    }
427

    
428
    /* media comments */
429

    
430
    hpos = put_header(pb, &codec_comment_header);
431
    put_guid(pb, &codec_comment1_header);
432
    put_le32(pb, s->nb_streams);
433
    for(n=0;n<s->nb_streams;n++) {
434
        AVCodec *p;
435

    
436
        enc = s->streams[n]->codec;
437
        p = avcodec_find_encoder(enc->codec_id);
438

    
439
        put_le16(pb, asf->streams[n].num);
440
        put_str16(pb, p ? p->name : enc->codec_name);
441
        put_le16(pb, 0); /* no parameters */
442

    
443

    
444
        /* id */
445
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
446
            put_le16(pb, 2);
447
            put_le16(pb, enc->codec_tag);
448
        } else {
449
            put_le16(pb, 4);
450
            put_le32(pb, enc->codec_tag);
451
        }
452
        if(!enc->codec_tag)
453
            return -1;
454
    }
455
    end_header(pb, hpos);
456

    
457
    /* patch the header size fields */
458

    
459
    cur_pos = url_ftell(pb);
460
    header_size = cur_pos - header_offset;
461
    if (asf->is_streamed) {
462
        header_size += 8 + 30 + 50;
463

    
464
        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
465
        put_le16(pb, header_size);
466
        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
467
        put_le16(pb, header_size);
468

    
469
        header_size -= 8 + 30 + 50;
470
    }
471
    header_size += 24 + 6;
472
    url_fseek(pb, header_offset - 14, SEEK_SET);
473
    put_le64(pb, header_size);
474
    url_fseek(pb, cur_pos, SEEK_SET);
475

    
476
    /* movie chunk, followed by packets of packet_size */
477
    asf->data_offset = cur_pos;
478
    put_guid(pb, &data_header);
479
    put_le64(pb, data_chunk_size);
480
    put_guid(pb, &my_guid);
481
    put_le64(pb, asf->nb_packets); /* nb packets */
482
    put_byte(pb, 1); /* ??? */
483
    put_byte(pb, 1); /* ??? */
484
    return 0;
485
}
486

    
487
static int asf_write_header(AVFormatContext *s)
488
{
489
    ASFContext *asf = s->priv_data;
490

    
491
    asf->packet_size = PACKET_SIZE;
492
    asf->nb_packets = 0;
493

    
494
    asf->last_indexed_pts = 0;
495
    asf->index_ptr = (ASFIndex*)av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
496
    asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
497
    asf->nb_index_count = 0;
498
    asf->maximum_packet = 0;
499

    
500
    if (asf_write_header1(s, 0, 50) < 0) {
501
        //av_free(asf);
502
        return -1;
503
    }
504

    
505
    put_flush_packet(&s->pb);
506

    
507
    asf->packet_nb_payloads = 0;
508
    asf->packet_timestamp_start = -1;
509
    asf->packet_timestamp_end = -1;
510
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
511
                  NULL, NULL, NULL, NULL);
512

    
513
    return 0;
514
}
515

    
516
static int asf_write_stream_header(AVFormatContext *s)
517
{
518
    ASFContext *asf = s->priv_data;
519

    
520
    asf->is_streamed = 1;
521

    
522
    return asf_write_header(s);
523
}
524

    
525
static int put_payload_parsing_info(
526
                                AVFormatContext *s,
527
                                unsigned int    sendtime,
528
                                unsigned int    duration,
529
                                int             nb_payloads,
530
                                int             padsize
531
            )
532
{
533
    ASFContext *asf = s->priv_data;
534
    ByteIOContext *pb = &s->pb;
535
    int ppi_size, i;
536
    int64_t start= url_ftell(pb);
537

    
538
    int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
539

    
540
    padsize -= PACKET_HEADER_MIN_SIZE;
541
    if(asf->multi_payloads_present)
542
        padsize--;
543
    assert(padsize>=0);
544

    
545
    put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
546
    for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
547
        put_byte(pb, 0x0);
548
    }
549

    
550
    if (asf->multi_payloads_present)
551
        iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
552

    
553
    if (padsize > 0) {
554
        if (padsize < 256)
555
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
556
        else
557
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
558
    }
559
    put_byte(pb, iLengthTypeFlags);
560

    
561
    put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
562

    
563
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
564
        put_le16(pb, padsize - 2);
565
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
566
        put_byte(pb, padsize - 1);
567

    
568
    put_le32(pb, sendtime);
569
    put_le16(pb, duration);
570
    if (asf->multi_payloads_present)
571
        put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
572

    
573
    ppi_size = url_ftell(pb) - start;
574

    
575
    return ppi_size;
576
}
577

    
578
static void flush_packet(AVFormatContext *s)
579
{
580
    ASFContext *asf = s->priv_data;
581
    int packet_hdr_size, packet_filled_size;
582

    
583
    if (asf->is_streamed) {
584
        put_chunk(s, 0x4424, asf->packet_size, 0);
585
    }
586

    
587
    packet_hdr_size = put_payload_parsing_info(
588
                            s,
589
                            asf->packet_timestamp_start,
590
                            asf->packet_timestamp_end - asf->packet_timestamp_start,
591
                            asf->packet_nb_payloads,
592
                            asf->packet_size_left
593
                        );
594

    
595
    packet_filled_size = PACKET_SIZE - asf->packet_size_left;
596
    assert(packet_hdr_size <= asf->packet_size_left);
597
    memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
598

    
599
    put_buffer(&s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
600

    
601
    put_flush_packet(&s->pb);
602
    asf->nb_packets++;
603
    asf->packet_nb_payloads = 0;
604
    asf->packet_timestamp_start = -1;
605
    asf->packet_timestamp_end = -1;
606
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
607
                  NULL, NULL, NULL, NULL);
608
}
609

    
610
static void put_payload_header(
611
                                AVFormatContext *s,
612
                                ASFStream       *stream,
613
                                int             presentation_time,
614
                                int             m_obj_size,
615
                                int             m_obj_offset,
616
                                int             payload_len,
617
                                int             flags
618
            )
619
{
620
    ASFContext *asf = s->priv_data;
621
    ByteIOContext *pb = &asf->pb;
622
    int val;
623

    
624
    val = stream->num;
625
    if (flags & PKT_FLAG_KEY)
626
        val |= ASF_PL_FLAG_KEY_FRAME;
627
    put_byte(pb, val);
628

    
629
    put_byte(pb, stream->seq);  //Media object number
630
    put_le32(pb, m_obj_offset); //Offset Into Media Object
631

    
632
    // Replicated Data shall be at least 8 bytes long.
633
    // The first 4 bytes of data shall contain the
634
    // Size of the Media Object that the payload belongs to.
635
    // The next 4 bytes of data shall contain the
636
    // Presentation Time for the media object that the payload belongs to.
637
    put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
638

    
639
    put_le32(pb, m_obj_size);       //Replicated Data - Media Object Size
640
    put_le32(pb, presentation_time);//Replicated Data - Presentation Time
641

    
642
    if (asf->multi_payloads_present){
643
        put_le16(pb, payload_len);   //payload length
644
    }
645
}
646

    
647
static void put_frame(
648
                    AVFormatContext *s,
649
                    ASFStream       *stream,
650
                    int             timestamp,
651
                    const uint8_t   *buf,
652
                    int             m_obj_size,
653
                    int             flags
654
                )
655
{
656
    ASFContext *asf = s->priv_data;
657
    int m_obj_offset, payload_len, frag_len1;
658

    
659
    m_obj_offset = 0;
660
    while (m_obj_offset < m_obj_size) {
661
        payload_len = m_obj_size - m_obj_offset;
662
        if (asf->packet_timestamp_start == -1) {
663
            asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
664

    
665
            asf->packet_size_left = PACKET_SIZE;
666
            if (asf->multi_payloads_present){
667
                frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
668
            }
669
            else {
670
                frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
671
            }
672
            asf->packet_timestamp_start = timestamp;
673
        }
674
        else {
675
            // multi payloads
676
            frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
677

    
678
            asf->packet_timestamp_start = timestamp;
679
        }
680
        if (frag_len1 > 0) {
681
            if (payload_len > frag_len1)
682
                payload_len = frag_len1;
683
            else if (payload_len == (frag_len1 - 1))
684
                payload_len = frag_len1 - 2;  //additional byte need to put padding length
685

    
686
            put_payload_header(s, stream, timestamp+preroll_time, m_obj_size, m_obj_offset, payload_len, flags);
687
            put_buffer(&asf->pb, buf, payload_len);
688

    
689
            if (asf->multi_payloads_present)
690
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
691
            else
692
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
693
            asf->packet_timestamp_end = timestamp;
694

    
695
            asf->packet_nb_payloads++;
696
        } else {
697
            payload_len = 0;
698
        }
699
        m_obj_offset += payload_len;
700
        buf += payload_len;
701

    
702
        if (!asf->multi_payloads_present)
703
            flush_packet(s);
704
        else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
705
            flush_packet(s);
706
    }
707
    stream->seq++;
708
}
709

    
710
static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
711
{
712
    ASFContext *asf = s->priv_data;
713
    ASFStream *stream;
714
    int64_t duration;
715
    AVCodecContext *codec;
716
    int64_t packet_st,pts;
717
    int start_sec,i;
718
    int flags= pkt->flags;
719

    
720
    codec = s->streams[pkt->stream_index]->codec;
721
    stream = &asf->streams[pkt->stream_index];
722

    
723
    if(codec->codec_type == CODEC_TYPE_AUDIO)
724
        flags &= ~PKT_FLAG_KEY;
725

    
726
    //XXX /FIXME use duration from AVPacket (quick hack by)
727
    pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
728
    assert(pts != AV_NOPTS_VALUE);
729
    duration = pts * 10000;
730
    asf->duration= FFMAX(asf->duration, duration);
731

    
732
    packet_st = asf->nb_packets;
733
    put_frame(s, stream, pkt->dts, pkt->data, pkt->size, flags);
734

    
735
    /* check index */
736
    if ((!asf->is_streamed) && (flags & PKT_FLAG_KEY)) {
737
        start_sec = (int)(duration / INT64_C(10000000));
738
        if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
739
            for(i=asf->nb_index_count;i<start_sec;i++) {
740
                if (i>=asf->nb_index_memory_alloc) {
741
                    asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
742
                    asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
743
                }
744
                // store
745
                asf->index_ptr[i].packet_number = (uint32_t)packet_st;
746
                asf->index_ptr[i].packet_count  = (uint16_t)(asf->nb_packets-packet_st);
747
                asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
748
            }
749
            asf->nb_index_count = start_sec;
750
            asf->last_indexed_pts = duration;
751
        }
752
    }
753
    return 0;
754
}
755

    
756
//
757
static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
758
{
759
    ByteIOContext *pb = &s->pb;
760
    int i;
761

    
762
    put_guid(pb, &simple_index_header);
763
    put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
764
    put_guid(pb, &my_guid);
765
    put_le64(pb, ASF_INDEXED_INTERVAL);
766
    put_le32(pb, max);
767
    put_le32(pb, count);
768
    for(i=0; i<count; i++) {
769
        put_le32(pb, index[i].packet_number);
770
        put_le16(pb, index[i].packet_count);
771
    }
772

    
773
    return 0;
774
}
775

    
776
static int asf_write_trailer(AVFormatContext *s)
777
{
778
    ASFContext *asf = s->priv_data;
779
    int64_t file_size,data_size;
780

    
781
    /* flush the current packet */
782
    if (asf->pb.buf_ptr > asf->pb.buffer)
783
        flush_packet(s);
784

    
785
    /* write index */
786
    data_size = url_ftell(&s->pb);
787
    if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
788
        asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
789
    }
790
    put_flush_packet(&s->pb);
791

    
792
    if (asf->is_streamed) {
793
        put_chunk(s, 0x4524, 0, 0); /* end of stream */
794
    } else {
795
        /* rewrite an updated header */
796
        file_size = url_ftell(&s->pb);
797
        url_fseek(&s->pb, 0, SEEK_SET);
798
        asf_write_header1(s, file_size, data_size - asf->data_offset);
799
    }
800

    
801
    put_flush_packet(&s->pb);
802
    av_free(asf->index_ptr);
803
    return 0;
804
}
805

    
806
#ifdef CONFIG_ASF_MUXER
807
AVOutputFormat asf_muxer = {
808
    "asf",
809
    "asf format",
810
    "video/x-ms-asf",
811
    "asf,wmv,wma",
812
    sizeof(ASFContext),
813
#ifdef CONFIG_LIBMP3LAME
814
    CODEC_ID_MP3,
815
#else
816
    CODEC_ID_MP2,
817
#endif
818
    CODEC_ID_MSMPEG4V3,
819
    asf_write_header,
820
    asf_write_packet,
821
    asf_write_trailer,
822
    .flags = AVFMT_GLOBALHEADER,
823
    .codec_tag= (const AVCodecTag*[]){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
824
};
825
#endif
826

    
827
#ifdef CONFIG_ASF_STREAM_MUXER
828
AVOutputFormat asf_stream_muxer = {
829
    "asf_stream",
830
    "asf format",
831
    "video/x-ms-asf",
832
    "asf,wmv,wma",
833
    sizeof(ASFContext),
834
#ifdef CONFIG_LIBMP3LAME
835
    CODEC_ID_MP3,
836
#else
837
    CODEC_ID_MP2,
838
#endif
839
    CODEC_ID_MSMPEG4V3,
840
    asf_write_stream_header,
841
    asf_write_packet,
842
    asf_write_trailer,
843
    .flags = AVFMT_GLOBALHEADER,
844
    .codec_tag= (const AVCodecTag*[]){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
845
};
846
#endif //CONFIG_ASF_STREAM_MUXER