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ffmpeg / libavformat / asfenc.c @ 17af0525

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1
/*
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 * ASF muxer
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 * Copyright (c) 2000, 2001 Fabrice Bellard
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 *
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
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
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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
15
 * 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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 */
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#include "avformat.h"
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#include "metadata.h"
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#include "riff.h"
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#include "asf.h"
25

    
26
#undef NDEBUG
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#include <assert.h>
28

    
29

    
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#define ASF_INDEXED_INTERVAL    10000000
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#define ASF_INDEX_BLOCK         600
32

    
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#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
34
#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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                )
38

    
39
#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
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#   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
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#else
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#   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
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#endif
44

    
45
#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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                )
51

    
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#define ASF_PPI_LENGTH_TYPE_FLAGS 0
53

    
54
#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
55

    
56
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
57
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 1
58
#endif
59
#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
61
#endif
62
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
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#   define ASF_PPI_SEQUENCE_FIELD_SIZE 4
64
#endif
65
#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
66
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 0
67
#endif
68

    
69

    
70
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
71
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
72
#endif
73
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
74
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
75
#endif
76
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
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#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
78
#endif
79
#ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
80
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
81
#endif
82

    
83
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
84
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
85
#endif
86
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
87
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
88
#endif
89
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
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#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
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#endif
92
#ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
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#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
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#endif
95

    
96
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
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#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
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#endif
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#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
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#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
101
#endif
102
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
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#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
104
#endif
105
#ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
106
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
107
#endif
108

    
109
#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))
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#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
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#endif
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#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))
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#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
114
#endif
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#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))
116
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
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#endif
118
#ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
119
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
120
#endif
121

    
122
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
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#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
124
#endif
125
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
126
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
127
#endif
128
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
129
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
130
#endif
131
#ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
132
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
133
#endif
134

    
135
#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
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#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
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#endif
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#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
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#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
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#endif
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#ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
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#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
143
#endif
144

    
145
#define PACKET_HEADER_MIN_SIZE (\
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                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*/ \
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                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*/ \
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                2   /*Duration Field*/ \
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                )
156

    
157

    
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// Replicated Data shall be at least 8 bytes long.
159
#define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
160

    
161
#define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
162
                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 \
167
                )
168

    
169
#define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
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                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 \
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                )
177

    
178
#define SINGLE_PAYLOAD_DATA_LENGTH (\
179
                PACKET_SIZE - \
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                PACKET_HEADER_MIN_SIZE - \
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                PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
182
                )
183

    
184
#define MULTI_PAYLOAD_CONSTANT (\
185
                PACKET_SIZE - \
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                PACKET_HEADER_MIN_SIZE - \
187
                1 - /*Payload Flags*/ \
188
                2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
189
                )
190

    
191
static const AVCodecTag codec_asf_bmp_tags[] = {
192
    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
193
    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
194
    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
195
    { CODEC_ID_NONE, 0 },
196
};
197

    
198
#define PREROLL_TIME 3100
199

    
200
static void put_guid(ByteIOContext *s, const GUID *g)
201
{
202
    assert(sizeof(*g) == 16);
203
    put_buffer(s, *g, sizeof(*g));
204
}
205

    
206
static void put_str16_nolen(ByteIOContext *s, const char *tag);
207
static void put_str16(ByteIOContext *s, const char *tag)
208
{
209
    put_le16(s,strlen(tag) + 1);
210
    put_str16_nolen(s, tag);
211
}
212

    
213
static void put_str16_nolen(ByteIOContext *s, const char *tag)
214
{
215
    int c;
216

    
217
    do{
218
        c = (uint8_t)*tag++;
219
        put_le16(s, c);
220
    }while(c);
221
}
222

    
223
static int64_t put_header(ByteIOContext *pb, const GUID *g)
224
{
225
    int64_t pos;
226

    
227
    pos = url_ftell(pb);
228
    put_guid(pb, g);
229
    put_le64(pb, 24);
230
    return pos;
231
}
232

    
233
/* update header size */
234
static void end_header(ByteIOContext *pb, int64_t pos)
235
{
236
    int64_t pos1;
237

    
238
    pos1 = url_ftell(pb);
239
    url_fseek(pb, pos + 16, SEEK_SET);
240
    put_le64(pb, pos1 - pos);
241
    url_fseek(pb, pos1, SEEK_SET);
242
}
243

    
244
/* write an asf chunk (only used in streaming case) */
245
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
246
{
247
    ASFContext *asf = s->priv_data;
248
    ByteIOContext *pb = s->pb;
249
    int length;
250

    
251
    length = payload_length + 8;
252
    put_le16(pb, type);
253
    put_le16(pb, length);    //size
254
    put_le32(pb, asf->seqno);//sequence number
255
    put_le16(pb, flags); /* unknown bytes */
256
    put_le16(pb, length);    //size_confirm
257
    asf->seqno++;
258
}
259

    
260
/* convert from unix to windows time */
261
static int64_t unix_to_file_time(int ti)
262
{
263
    int64_t t;
264

    
265
    t = ti * INT64_C(10000000);
266
    t += INT64_C(116444736000000000);
267
    return t;
268
}
269

    
270
/* write the header (used two times if non streamed) */
271
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
272
{
273
    ASFContext *asf = s->priv_data;
274
    ByteIOContext *pb = s->pb;
275
    AVMetadataTag *title, *author, *copyright, *comment;
276
    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
277
    int has_title;
278
    int metadata_count;
279
    AVCodecContext *enc;
280
    int64_t header_offset, cur_pos, hpos;
281
    int bit_rate;
282
    int64_t duration;
283

    
284
    title     = av_metadata_get(s->metadata, "title"    , NULL, 0);
285
    author    = av_metadata_get(s->metadata, "author"   , NULL, 0);
286
    copyright = av_metadata_get(s->metadata, "copyright", NULL, 0);
287
    comment   = av_metadata_get(s->metadata, "comment"  , NULL, 0);
288

    
289
    duration = asf->duration + PREROLL_TIME * 10000;
290
    has_title = title || author || copyright || comment;
291
    metadata_count = s->metadata ? s->metadata->count : 0;
292

    
293
    bit_rate = 0;
294
    for(n=0;n<s->nb_streams;n++) {
295
        enc = s->streams[n]->codec;
296

    
297
        av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
298

    
299
        bit_rate += enc->bit_rate;
300
    }
301

    
302
    if (asf->is_streamed) {
303
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
304
    }
305

    
306
    put_guid(pb, &ff_asf_header);
307
    put_le64(pb, -1); /* header length, will be patched after */
308
    put_le32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
309
    put_byte(pb, 1); /* ??? */
310
    put_byte(pb, 2); /* ??? */
311

    
312
    /* file header */
313
    header_offset = url_ftell(pb);
314
    hpos = put_header(pb, &ff_asf_file_header);
315
    put_guid(pb, &ff_asf_my_guid);
316
    put_le64(pb, file_size);
317
    file_time = 0;
318
    put_le64(pb, unix_to_file_time(file_time));
319
    put_le64(pb, asf->nb_packets); /* number of packets */
320
    put_le64(pb, duration); /* end time stamp (in 100ns units) */
321
    put_le64(pb, asf->duration); /* duration (in 100ns units) */
322
    put_le64(pb, PREROLL_TIME); /* start time stamp */
323
    put_le32(pb, (asf->is_streamed || url_is_streamed(pb)) ? 3 : 2); /* ??? */
324
    put_le32(pb, asf->packet_size); /* packet size */
325
    put_le32(pb, asf->packet_size); /* packet size */
326
    put_le32(pb, bit_rate); /* Nominal data rate in bps */
327
    end_header(pb, hpos);
328

    
329
    /* unknown headers */
330
    hpos = put_header(pb, &ff_asf_head1_guid);
331
    put_guid(pb, &ff_asf_head2_guid);
332
    put_le32(pb, 6);
333
    put_le16(pb, 0);
334
    end_header(pb, hpos);
335

    
336
    /* title and other infos */
337
    if (has_title) {
338
        hpos = put_header(pb, &ff_asf_comment_header);
339
        put_le16(pb, title     ? 2 * (strlen(title->value    ) + 1) : 0);
340
        put_le16(pb, author    ? 2 * (strlen(author->value   ) + 1) : 0);
341
        put_le16(pb, copyright ? 2 * (strlen(copyright->value) + 1) : 0);
342
        put_le16(pb, comment   ? 2 * (strlen(comment->value  ) + 1) : 0);
343
        put_le16(pb, 0);
344
        if (title    ) put_str16_nolen(pb, title->value    );
345
        if (author   ) put_str16_nolen(pb, author->value   );
346
        if (copyright) put_str16_nolen(pb, copyright->value);
347
        if (comment  ) put_str16_nolen(pb, comment->value  );
348
        end_header(pb, hpos);
349
    }
350
    if (metadata_count) {
351
        AVMetadataTag *tag = NULL;
352
        hpos = put_header(pb, &ff_asf_extended_content_header);
353
        put_le16(pb, metadata_count);
354
        while ((tag = av_metadata_get(s->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
355
            put_le16(pb, 2*(strlen(tag->key) + 3) + 1);
356
            put_le16(pb, 'W');
357
            put_le16(pb, 'M');
358
            put_le16(pb, '/');
359
            put_str16_nolen(pb, tag->key);
360
            put_le16(pb, 0);
361
            put_le16(pb, 2*strlen(tag->value) + 1);
362
            put_str16_nolen(pb, tag->value);
363
        }
364
        end_header(pb, hpos);
365
    }
366

    
367
    /* stream headers */
368
    for(n=0;n<s->nb_streams;n++) {
369
        int64_t es_pos;
370
        //        ASFStream *stream = &asf->streams[n];
371

    
372
        enc = s->streams[n]->codec;
373
        asf->streams[n].num = n + 1;
374
        asf->streams[n].seq = 0;
375

    
376

    
377
        switch(enc->codec_type) {
378
        case CODEC_TYPE_AUDIO:
379
            wav_extra_size = 0;
380
            extra_size = 18 + wav_extra_size;
381
            extra_size2 = 8;
382
            break;
383
        default:
384
        case CODEC_TYPE_VIDEO:
385
            wav_extra_size = enc->extradata_size;
386
            extra_size = 0x33 + wav_extra_size;
387
            extra_size2 = 0;
388
            break;
389
        }
390

    
391
        hpos = put_header(pb, &ff_asf_stream_header);
392
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
393
            put_guid(pb, &ff_asf_audio_stream);
394
            put_guid(pb, &ff_asf_audio_conceal_spread);
395
        } else {
396
            put_guid(pb, &ff_asf_video_stream);
397
            put_guid(pb, &ff_asf_video_conceal_none);
398
        }
399
        put_le64(pb, 0); /* ??? */
400
        es_pos = url_ftell(pb);
401
        put_le32(pb, extra_size); /* wav header len */
402
        put_le32(pb, extra_size2); /* additional data len */
403
        put_le16(pb, n + 1); /* stream number */
404
        put_le32(pb, 0); /* ??? */
405

    
406
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
407
            /* WAVEFORMATEX header */
408
            int wavsize = put_wav_header(pb, enc);
409
            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)) {
410
                wavsize += 2;
411
                put_le16(pb, 0);
412
            }
413

    
414
            if (wavsize < 0)
415
                return -1;
416
            if (wavsize != extra_size) {
417
                cur_pos = url_ftell(pb);
418
                url_fseek(pb, es_pos, SEEK_SET);
419
                put_le32(pb, wavsize); /* wav header len */
420
                url_fseek(pb, cur_pos, SEEK_SET);
421
            }
422
            /* ERROR Correction */
423
            put_byte(pb, 0x01);
424
            if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){
425
                put_le16(pb, 0x0190);
426
                put_le16(pb, 0x0190);
427
            }else{
428
                put_le16(pb, enc->block_align);
429
                put_le16(pb, enc->block_align);
430
            }
431
            put_le16(pb, 0x01);
432
            put_byte(pb, 0x00);
433
        } else {
434
            put_le32(pb, enc->width);
435
            put_le32(pb, enc->height);
436
            put_byte(pb, 2); /* ??? */
437
            put_le16(pb, 40 + enc->extradata_size); /* size */
438

    
439
            /* BITMAPINFOHEADER header */
440
            put_bmp_header(pb, enc, codec_bmp_tags, 1);
441
        }
442
        end_header(pb, hpos);
443
    }
444

    
445
    /* media comments */
446

    
447
    hpos = put_header(pb, &ff_asf_codec_comment_header);
448
    put_guid(pb, &ff_asf_codec_comment1_header);
449
    put_le32(pb, s->nb_streams);
450
    for(n=0;n<s->nb_streams;n++) {
451
        AVCodec *p;
452

    
453
        enc = s->streams[n]->codec;
454
        p = avcodec_find_encoder(enc->codec_id);
455

    
456
        if(enc->codec_type == CODEC_TYPE_AUDIO)
457
            put_le16(pb, 2);
458
        else if(enc->codec_type == CODEC_TYPE_VIDEO)
459
            put_le16(pb, 1);
460
        else
461
            put_le16(pb, -1);
462

    
463
        if(enc->codec_id == CODEC_ID_WMAV2)
464
            put_str16(pb, "Windows Media Audio V8");
465
        else
466
            put_str16(pb, p ? p->name : enc->codec_name);
467
        put_le16(pb, 0); /* no parameters */
468

    
469

    
470
        /* id */
471
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
472
            put_le16(pb, 2);
473
            put_le16(pb, enc->codec_tag);
474
        } else {
475
            put_le16(pb, 4);
476
            put_le32(pb, enc->codec_tag);
477
        }
478
        if(!enc->codec_tag)
479
            return -1;
480
    }
481
    end_header(pb, hpos);
482

    
483
    /* patch the header size fields */
484

    
485
    cur_pos = url_ftell(pb);
486
    header_size = cur_pos - header_offset;
487
    if (asf->is_streamed) {
488
        header_size += 8 + 30 + 50;
489

    
490
        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
491
        put_le16(pb, header_size);
492
        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
493
        put_le16(pb, header_size);
494

    
495
        header_size -= 8 + 30 + 50;
496
    }
497
    header_size += 24 + 6;
498
    url_fseek(pb, header_offset - 14, SEEK_SET);
499
    put_le64(pb, header_size);
500
    url_fseek(pb, cur_pos, SEEK_SET);
501

    
502
    /* movie chunk, followed by packets of packet_size */
503
    asf->data_offset = cur_pos;
504
    put_guid(pb, &ff_asf_data_header);
505
    put_le64(pb, data_chunk_size);
506
    put_guid(pb, &ff_asf_my_guid);
507
    put_le64(pb, asf->nb_packets); /* nb packets */
508
    put_byte(pb, 1); /* ??? */
509
    put_byte(pb, 1); /* ??? */
510
    return 0;
511
}
512

    
513
static int asf_write_header(AVFormatContext *s)
514
{
515
    ASFContext *asf = s->priv_data;
516

    
517
    asf->packet_size = PACKET_SIZE;
518
    asf->nb_packets = 0;
519

    
520
    asf->last_indexed_pts = 0;
521
    asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
522
    asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
523
    asf->nb_index_count = 0;
524
    asf->maximum_packet = 0;
525

    
526
    /* the data-chunk-size has to be 50, which is data_size - asf->data_offset
527
     *  at the moment this function is done. It is needed to use asf as
528
     *  streamable format. */
529
    if (asf_write_header1(s, 0, 50) < 0) {
530
        //av_free(asf);
531
        return -1;
532
    }
533

    
534
    put_flush_packet(s->pb);
535

    
536
    asf->packet_nb_payloads = 0;
537
    asf->packet_timestamp_start = -1;
538
    asf->packet_timestamp_end = -1;
539
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
540
                  NULL, NULL, NULL, NULL);
541

    
542
    return 0;
543
}
544

    
545
static int asf_write_stream_header(AVFormatContext *s)
546
{
547
    ASFContext *asf = s->priv_data;
548

    
549
    asf->is_streamed = 1;
550

    
551
    return asf_write_header(s);
552
}
553

    
554
static int put_payload_parsing_info(
555
                                AVFormatContext *s,
556
                                unsigned int    sendtime,
557
                                unsigned int    duration,
558
                                int             nb_payloads,
559
                                int             padsize
560
            )
561
{
562
    ASFContext *asf = s->priv_data;
563
    ByteIOContext *pb = s->pb;
564
    int ppi_size, i;
565
    int64_t start= url_ftell(pb);
566

    
567
    int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
568

    
569
    padsize -= PACKET_HEADER_MIN_SIZE;
570
    if(asf->multi_payloads_present)
571
        padsize--;
572
    assert(padsize>=0);
573

    
574
    put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
575
    for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
576
        put_byte(pb, 0x0);
577
    }
578

    
579
    if (asf->multi_payloads_present)
580
        iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
581

    
582
    if (padsize > 0) {
583
        if (padsize < 256)
584
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
585
        else
586
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
587
    }
588
    put_byte(pb, iLengthTypeFlags);
589

    
590
    put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
591

    
592
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
593
        put_le16(pb, padsize - 2);
594
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
595
        put_byte(pb, padsize - 1);
596

    
597
    put_le32(pb, sendtime);
598
    put_le16(pb, duration);
599
    if (asf->multi_payloads_present)
600
        put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
601

    
602
    ppi_size = url_ftell(pb) - start;
603

    
604
    return ppi_size;
605
}
606

    
607
static void flush_packet(AVFormatContext *s)
608
{
609
    ASFContext *asf = s->priv_data;
610
    int packet_hdr_size, packet_filled_size;
611

    
612
    assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
613

    
614
    if (asf->is_streamed) {
615
        put_chunk(s, 0x4424, asf->packet_size, 0);
616
    }
617

    
618
    packet_hdr_size = put_payload_parsing_info(
619
                            s,
620
                            asf->packet_timestamp_start,
621
                            asf->packet_timestamp_end - asf->packet_timestamp_start,
622
                            asf->packet_nb_payloads,
623
                            asf->packet_size_left
624
                        );
625

    
626
    packet_filled_size = PACKET_SIZE - asf->packet_size_left;
627
    assert(packet_hdr_size <= asf->packet_size_left);
628
    memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
629

    
630
    put_buffer(s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
631

    
632
    put_flush_packet(s->pb);
633
    asf->nb_packets++;
634
    asf->packet_nb_payloads = 0;
635
    asf->packet_timestamp_start = -1;
636
    asf->packet_timestamp_end = -1;
637
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
638
                  NULL, NULL, NULL, NULL);
639
}
640

    
641
static void put_payload_header(
642
                                AVFormatContext *s,
643
                                ASFStream       *stream,
644
                                int             presentation_time,
645
                                int             m_obj_size,
646
                                int             m_obj_offset,
647
                                int             payload_len,
648
                                int             flags
649
            )
650
{
651
    ASFContext *asf = s->priv_data;
652
    ByteIOContext *pb = &asf->pb;
653
    int val;
654

    
655
    val = stream->num;
656
    if (flags & PKT_FLAG_KEY)
657
        val |= ASF_PL_FLAG_KEY_FRAME;
658
    put_byte(pb, val);
659

    
660
    put_byte(pb, stream->seq);  //Media object number
661
    put_le32(pb, m_obj_offset); //Offset Into Media Object
662

    
663
    // Replicated Data shall be at least 8 bytes long.
664
    // The first 4 bytes of data shall contain the
665
    // Size of the Media Object that the payload belongs to.
666
    // The next 4 bytes of data shall contain the
667
    // Presentation Time for the media object that the payload belongs to.
668
    put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
669

    
670
    put_le32(pb, m_obj_size);       //Replicated Data - Media Object Size
671
    put_le32(pb, presentation_time);//Replicated Data - Presentation Time
672

    
673
    if (asf->multi_payloads_present){
674
        put_le16(pb, payload_len);   //payload length
675
    }
676
}
677

    
678
static void put_frame(
679
                    AVFormatContext *s,
680
                    ASFStream       *stream,
681
                    AVStream        *avst,
682
                    int             timestamp,
683
                    const uint8_t   *buf,
684
                    int             m_obj_size,
685
                    int             flags
686
                )
687
{
688
    ASFContext *asf = s->priv_data;
689
    int m_obj_offset, payload_len, frag_len1;
690

    
691
    m_obj_offset = 0;
692
    while (m_obj_offset < m_obj_size) {
693
        payload_len = m_obj_size - m_obj_offset;
694
        if (asf->packet_timestamp_start == -1) {
695
            asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
696

    
697
            asf->packet_size_left = PACKET_SIZE;
698
            if (asf->multi_payloads_present){
699
                frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
700
            }
701
            else {
702
                frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
703
            }
704
            asf->packet_timestamp_start = timestamp;
705
        }
706
        else {
707
            // multi payloads
708
            frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
709

    
710
            if(frag_len1 < payload_len && avst->codec->codec_type == CODEC_TYPE_AUDIO){
711
                flush_packet(s);
712
                continue;
713
            }
714
        }
715
        if (frag_len1 > 0) {
716
            if (payload_len > frag_len1)
717
                payload_len = frag_len1;
718
            else if (payload_len == (frag_len1 - 1))
719
                payload_len = frag_len1 - 2;  //additional byte need to put padding length
720

    
721
            put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
722
            put_buffer(&asf->pb, buf, payload_len);
723

    
724
            if (asf->multi_payloads_present)
725
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
726
            else
727
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
728
            asf->packet_timestamp_end = timestamp;
729

    
730
            asf->packet_nb_payloads++;
731
        } else {
732
            payload_len = 0;
733
        }
734
        m_obj_offset += payload_len;
735
        buf += payload_len;
736

    
737
        if (!asf->multi_payloads_present)
738
            flush_packet(s);
739
        else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
740
            flush_packet(s);
741
    }
742
    stream->seq++;
743
}
744

    
745
static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
746
{
747
    ASFContext *asf = s->priv_data;
748
    ASFStream *stream;
749
    int64_t duration;
750
    AVCodecContext *codec;
751
    int64_t packet_st,pts;
752
    int start_sec,i;
753
    int flags= pkt->flags;
754

    
755
    codec = s->streams[pkt->stream_index]->codec;
756
    stream = &asf->streams[pkt->stream_index];
757

    
758
    if(codec->codec_type == CODEC_TYPE_AUDIO)
759
        flags &= ~PKT_FLAG_KEY;
760

    
761
    pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
762
    assert(pts != AV_NOPTS_VALUE);
763
    duration = pts * 10000;
764
    asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000);
765

    
766
    packet_st = asf->nb_packets;
767
    put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
768

    
769
    /* check index */
770
    if ((!asf->is_streamed) && (flags & PKT_FLAG_KEY)) {
771
        start_sec = (int)(duration / INT64_C(10000000));
772
        if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
773
            for(i=asf->nb_index_count;i<start_sec;i++) {
774
                if (i>=asf->nb_index_memory_alloc) {
775
                    asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
776
                    asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
777
                }
778
                // store
779
                asf->index_ptr[i].packet_number = (uint32_t)packet_st;
780
                asf->index_ptr[i].packet_count  = (uint16_t)(asf->nb_packets-packet_st);
781
                asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
782
            }
783
            asf->nb_index_count = start_sec;
784
            asf->last_indexed_pts = duration;
785
        }
786
    }
787
    return 0;
788
}
789

    
790
//
791
static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
792
{
793
    ByteIOContext *pb = s->pb;
794
    int i;
795

    
796
    put_guid(pb, &ff_asf_simple_index_header);
797
    put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
798
    put_guid(pb, &ff_asf_my_guid);
799
    put_le64(pb, ASF_INDEXED_INTERVAL);
800
    put_le32(pb, max);
801
    put_le32(pb, count);
802
    for(i=0; i<count; i++) {
803
        put_le32(pb, index[i].packet_number);
804
        put_le16(pb, index[i].packet_count);
805
    }
806

    
807
    return 0;
808
}
809

    
810
static int asf_write_trailer(AVFormatContext *s)
811
{
812
    ASFContext *asf = s->priv_data;
813
    int64_t file_size,data_size;
814

    
815
    /* flush the current packet */
816
    if (asf->pb.buf_ptr > asf->pb.buffer)
817
        flush_packet(s);
818

    
819
    /* write index */
820
    data_size = url_ftell(s->pb);
821
    if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
822
        asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
823
    }
824
    put_flush_packet(s->pb);
825

    
826
    if (asf->is_streamed || url_is_streamed(s->pb)) {
827
        put_chunk(s, 0x4524, 0, 0); /* end of stream */
828
    } else {
829
        /* rewrite an updated header */
830
        file_size = url_ftell(s->pb);
831
        url_fseek(s->pb, 0, SEEK_SET);
832
        asf_write_header1(s, file_size, data_size - asf->data_offset);
833
    }
834

    
835
    put_flush_packet(s->pb);
836
    av_free(asf->index_ptr);
837
    return 0;
838
}
839

    
840
#if CONFIG_ASF_MUXER
841
AVOutputFormat asf_muxer = {
842
    "asf",
843
    NULL_IF_CONFIG_SMALL("ASF format"),
844
    "video/x-ms-asf",
845
    "asf,wmv,wma",
846
    sizeof(ASFContext),
847
#if CONFIG_LIBMP3LAME
848
    CODEC_ID_MP3,
849
#else
850
    CODEC_ID_MP2,
851
#endif
852
    CODEC_ID_MSMPEG4V3,
853
    asf_write_header,
854
    asf_write_packet,
855
    asf_write_trailer,
856
    .flags = AVFMT_GLOBALHEADER,
857
    .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
858
};
859
#endif
860

    
861
#if CONFIG_ASF_STREAM_MUXER
862
AVOutputFormat asf_stream_muxer = {
863
    "asf_stream",
864
    NULL_IF_CONFIG_SMALL("ASF format"),
865
    "video/x-ms-asf",
866
    "asf,wmv,wma",
867
    sizeof(ASFContext),
868
#if CONFIG_LIBMP3LAME
869
    CODEC_ID_MP3,
870
#else
871
    CODEC_ID_MP2,
872
#endif
873
    CODEC_ID_MSMPEG4V3,
874
    asf_write_stream_header,
875
    asf_write_packet,
876
    asf_write_trailer,
877
    .flags = AVFMT_GLOBALHEADER,
878
    .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
879
};
880
#endif //CONFIG_ASF_STREAM_MUXER