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ffmpeg / libavformat / asfenc.c @ 72415b2a

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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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 */
21
#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
43
#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

    
52
#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))
60
#   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))
77
#   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
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#   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
115
#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
117
#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))
123
#   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))
136
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
137
#endif
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#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
139
#   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 ff_asf_guid *g)
201
{
202
    assert(sizeof(*g) == 16);
203
    put_buffer(s, *g, sizeof(*g));
204
}
205

    
206
static void put_str16(ByteIOContext *s, const char *tag)
207
{
208
    int len;
209
    uint8_t *pb;
210
    ByteIOContext *dyn_buf;
211
    if (url_open_dyn_buf(&dyn_buf) < 0)
212
        return;
213

    
214
    ff_put_str16_nolen(dyn_buf, tag);
215
    len = url_close_dyn_buf(dyn_buf, &pb);
216
    put_le16(s, len);
217
    put_buffer(s, pb, len);
218
    av_freep(&pb);
219
}
220

    
221
static int64_t put_header(ByteIOContext *pb, const ff_asf_guid *g)
222
{
223
    int64_t pos;
224

    
225
    pos = url_ftell(pb);
226
    put_guid(pb, g);
227
    put_le64(pb, 24);
228
    return pos;
229
}
230

    
231
/* update header size */
232
static void end_header(ByteIOContext *pb, int64_t pos)
233
{
234
    int64_t pos1;
235

    
236
    pos1 = url_ftell(pb);
237
    url_fseek(pb, pos + 16, SEEK_SET);
238
    put_le64(pb, pos1 - pos);
239
    url_fseek(pb, pos1, SEEK_SET);
240
}
241

    
242
/* write an asf chunk (only used in streaming case) */
243
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
244
{
245
    ASFContext *asf = s->priv_data;
246
    ByteIOContext *pb = s->pb;
247
    int length;
248

    
249
    length = payload_length + 8;
250
    put_le16(pb, type);
251
    put_le16(pb, length);    //size
252
    put_le32(pb, asf->seqno);//sequence number
253
    put_le16(pb, flags); /* unknown bytes */
254
    put_le16(pb, length);    //size_confirm
255
    asf->seqno++;
256
}
257

    
258
/* convert from unix to windows time */
259
static int64_t unix_to_file_time(int ti)
260
{
261
    int64_t t;
262

    
263
    t = ti * INT64_C(10000000);
264
    t += INT64_C(116444736000000000);
265
    return t;
266
}
267

    
268
/* write the header (used two times if non streamed) */
269
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
270
{
271
    ASFContext *asf = s->priv_data;
272
    ByteIOContext *pb = s->pb;
273
    AVMetadataTag *tags[5];
274
    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
275
    int has_title;
276
    int metadata_count;
277
    AVCodecContext *enc;
278
    int64_t header_offset, cur_pos, hpos;
279
    int bit_rate;
280
    int64_t duration;
281

    
282
    tags[0] = av_metadata_get(s->metadata, "title"    , NULL, 0);
283
    tags[1] = av_metadata_get(s->metadata, "author"   , NULL, 0);
284
    tags[2] = av_metadata_get(s->metadata, "copyright", NULL, 0);
285
    tags[3] = av_metadata_get(s->metadata, "comment"  , NULL, 0);
286
    tags[4] = av_metadata_get(s->metadata, "rating"   , NULL, 0);
287

    
288
    duration = asf->duration + PREROLL_TIME * 10000;
289
    has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
290
    metadata_count = s->metadata ? s->metadata->count : 0;
291

    
292
    bit_rate = 0;
293
    for(n=0;n<s->nb_streams;n++) {
294
        enc = s->streams[n]->codec;
295

    
296
        av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
297

    
298
        bit_rate += enc->bit_rate;
299
    }
300

    
301
    if (asf->is_streamed) {
302
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
303
    }
304

    
305
    put_guid(pb, &ff_asf_header);
306
    put_le64(pb, -1); /* header length, will be patched after */
307
    put_le32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
308
    put_byte(pb, 1); /* ??? */
309
    put_byte(pb, 2); /* ??? */
310

    
311
    /* file header */
312
    header_offset = url_ftell(pb);
313
    hpos = put_header(pb, &ff_asf_file_header);
314
    put_guid(pb, &ff_asf_my_guid);
315
    put_le64(pb, file_size);
316
    file_time = 0;
317
    put_le64(pb, unix_to_file_time(file_time));
318
    put_le64(pb, asf->nb_packets); /* number of packets */
319
    put_le64(pb, duration); /* end time stamp (in 100ns units) */
320
    put_le64(pb, asf->duration); /* duration (in 100ns units) */
321
    put_le64(pb, PREROLL_TIME); /* start time stamp */
322
    put_le32(pb, (asf->is_streamed || url_is_streamed(pb)) ? 3 : 2); /* ??? */
323
    put_le32(pb, s->packet_size); /* packet size */
324
    put_le32(pb, s->packet_size); /* packet size */
325
    put_le32(pb, bit_rate); /* Nominal data rate in bps */
326
    end_header(pb, hpos);
327

    
328
    /* unknown headers */
329
    hpos = put_header(pb, &ff_asf_head1_guid);
330
    put_guid(pb, &ff_asf_head2_guid);
331
    put_le32(pb, 6);
332
    put_le16(pb, 0);
333
    end_header(pb, hpos);
334

    
335
    /* title and other infos */
336
    if (has_title) {
337
        int len;
338
        uint8_t *buf;
339
        ByteIOContext *dyn_buf;
340

    
341
        if (url_open_dyn_buf(&dyn_buf) < 0)
342
            return AVERROR(ENOMEM);
343

    
344
        hpos = put_header(pb, &ff_asf_comment_header);
345

    
346
        for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
347
            len = tags[n] ? ff_put_str16_nolen(dyn_buf, tags[n]->value) : 0;
348
            put_le16(pb, len);
349
        }
350
        len = url_close_dyn_buf(dyn_buf, &buf);
351
        put_buffer(pb, buf, len);
352
        av_freep(&buf);
353
        end_header(pb, hpos);
354
    }
355
    if (metadata_count) {
356
        AVMetadataTag *tag = NULL;
357
        hpos = put_header(pb, &ff_asf_extended_content_header);
358
        put_le16(pb, metadata_count);
359
        while ((tag = av_metadata_get(s->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
360
            put_str16(pb, tag->key);
361
            put_le16(pb, 0);
362
            put_str16(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 AVMEDIA_TYPE_AUDIO:
379
            wav_extra_size = 0;
380
            extra_size = 18 + wav_extra_size;
381
            extra_size2 = 8;
382
            break;
383
        default:
384
        case AVMEDIA_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 == AVMEDIA_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 == AVMEDIA_TYPE_AUDIO) {
407
            /* WAVEFORMATEX header */
408
            int wavsize = ff_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
            ff_put_bmp_header(pb, enc, ff_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
        const char *desc;
453
        int len;
454
        uint8_t *buf;
455
        ByteIOContext *dyn_buf;
456

    
457
        enc = s->streams[n]->codec;
458
        p = avcodec_find_encoder(enc->codec_id);
459

    
460
        if(enc->codec_type == AVMEDIA_TYPE_AUDIO)
461
            put_le16(pb, 2);
462
        else if(enc->codec_type == AVMEDIA_TYPE_VIDEO)
463
            put_le16(pb, 1);
464
        else
465
            put_le16(pb, -1);
466

    
467
        if(enc->codec_id == CODEC_ID_WMAV2)
468
            desc = "Windows Media Audio V8";
469
        else
470
            desc = p ? p->name : enc->codec_name;
471

    
472
        if ( url_open_dyn_buf(&dyn_buf) < 0)
473
            return AVERROR(ENOMEM);
474

    
475
        ff_put_str16_nolen(dyn_buf, desc);
476
        len = url_close_dyn_buf(dyn_buf, &buf);
477
        put_le16(pb, len / 2); // "number of characters" = length in bytes / 2
478

    
479
        put_buffer(pb, buf, len);
480
        av_freep(&buf);
481

    
482
        put_le16(pb, 0); /* no parameters */
483

    
484

    
485
        /* id */
486
        if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
487
            put_le16(pb, 2);
488
            put_le16(pb, enc->codec_tag);
489
        } else {
490
            put_le16(pb, 4);
491
            put_le32(pb, enc->codec_tag);
492
        }
493
        if(!enc->codec_tag)
494
            return -1;
495
    }
496
    end_header(pb, hpos);
497

    
498
    /* patch the header size fields */
499

    
500
    cur_pos = url_ftell(pb);
501
    header_size = cur_pos - header_offset;
502
    if (asf->is_streamed) {
503
        header_size += 8 + 30 + 50;
504

    
505
        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
506
        put_le16(pb, header_size);
507
        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
508
        put_le16(pb, header_size);
509

    
510
        header_size -= 8 + 30 + 50;
511
    }
512
    header_size += 24 + 6;
513
    url_fseek(pb, header_offset - 14, SEEK_SET);
514
    put_le64(pb, header_size);
515
    url_fseek(pb, cur_pos, SEEK_SET);
516

    
517
    /* movie chunk, followed by packets of packet_size */
518
    asf->data_offset = cur_pos;
519
    put_guid(pb, &ff_asf_data_header);
520
    put_le64(pb, data_chunk_size);
521
    put_guid(pb, &ff_asf_my_guid);
522
    put_le64(pb, asf->nb_packets); /* nb packets */
523
    put_byte(pb, 1); /* ??? */
524
    put_byte(pb, 1); /* ??? */
525
    return 0;
526
}
527

    
528
static int asf_write_header(AVFormatContext *s)
529
{
530
    ASFContext *asf = s->priv_data;
531

    
532
    s->packet_size  = PACKET_SIZE;
533
    asf->nb_packets = 0;
534

    
535
    asf->last_indexed_pts = 0;
536
    asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
537
    asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
538
    asf->nb_index_count = 0;
539
    asf->maximum_packet = 0;
540

    
541
    /* the data-chunk-size has to be 50, which is data_size - asf->data_offset
542
     *  at the moment this function is done. It is needed to use asf as
543
     *  streamable format. */
544
    if (asf_write_header1(s, 0, 50) < 0) {
545
        //av_free(asf);
546
        return -1;
547
    }
548

    
549
    put_flush_packet(s->pb);
550

    
551
    asf->packet_nb_payloads = 0;
552
    asf->packet_timestamp_start = -1;
553
    asf->packet_timestamp_end = -1;
554
    init_put_byte(&asf->pb, asf->packet_buf, s->packet_size, 1,
555
                  NULL, NULL, NULL, NULL);
556

    
557
    return 0;
558
}
559

    
560
static int asf_write_stream_header(AVFormatContext *s)
561
{
562
    ASFContext *asf = s->priv_data;
563

    
564
    asf->is_streamed = 1;
565

    
566
    return asf_write_header(s);
567
}
568

    
569
static int put_payload_parsing_info(
570
                                AVFormatContext *s,
571
                                unsigned int    sendtime,
572
                                unsigned int    duration,
573
                                int             nb_payloads,
574
                                int             padsize
575
            )
576
{
577
    ASFContext *asf = s->priv_data;
578
    ByteIOContext *pb = s->pb;
579
    int ppi_size, i;
580
    int64_t start= url_ftell(pb);
581

    
582
    int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
583

    
584
    padsize -= PACKET_HEADER_MIN_SIZE;
585
    if(asf->multi_payloads_present)
586
        padsize--;
587
    assert(padsize>=0);
588

    
589
    put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
590
    for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
591
        put_byte(pb, 0x0);
592
    }
593

    
594
    if (asf->multi_payloads_present)
595
        iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
596

    
597
    if (padsize > 0) {
598
        if (padsize < 256)
599
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
600
        else
601
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
602
    }
603
    put_byte(pb, iLengthTypeFlags);
604

    
605
    put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
606

    
607
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
608
        put_le16(pb, padsize - 2);
609
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
610
        put_byte(pb, padsize - 1);
611

    
612
    put_le32(pb, sendtime);
613
    put_le16(pb, duration);
614
    if (asf->multi_payloads_present)
615
        put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
616

    
617
    ppi_size = url_ftell(pb) - start;
618

    
619
    return ppi_size;
620
}
621

    
622
static void flush_packet(AVFormatContext *s)
623
{
624
    ASFContext *asf = s->priv_data;
625
    int packet_hdr_size, packet_filled_size;
626

    
627
    assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
628

    
629
    if (asf->is_streamed) {
630
        put_chunk(s, 0x4424, s->packet_size, 0);
631
    }
632

    
633
    packet_hdr_size = put_payload_parsing_info(
634
                            s,
635
                            asf->packet_timestamp_start,
636
                            asf->packet_timestamp_end - asf->packet_timestamp_start,
637
                            asf->packet_nb_payloads,
638
                            asf->packet_size_left
639
                        );
640

    
641
    packet_filled_size = PACKET_SIZE - asf->packet_size_left;
642
    assert(packet_hdr_size <= asf->packet_size_left);
643
    memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
644

    
645
    put_buffer(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
646

    
647
    put_flush_packet(s->pb);
648
    asf->nb_packets++;
649
    asf->packet_nb_payloads = 0;
650
    asf->packet_timestamp_start = -1;
651
    asf->packet_timestamp_end = -1;
652
    init_put_byte(&asf->pb, asf->packet_buf, s->packet_size, 1,
653
                  NULL, NULL, NULL, NULL);
654
}
655

    
656
static void put_payload_header(
657
                                AVFormatContext *s,
658
                                ASFStream       *stream,
659
                                int             presentation_time,
660
                                int             m_obj_size,
661
                                int             m_obj_offset,
662
                                int             payload_len,
663
                                int             flags
664
            )
665
{
666
    ASFContext *asf = s->priv_data;
667
    ByteIOContext *pb = &asf->pb;
668
    int val;
669

    
670
    val = stream->num;
671
    if (flags & PKT_FLAG_KEY)
672
        val |= ASF_PL_FLAG_KEY_FRAME;
673
    put_byte(pb, val);
674

    
675
    put_byte(pb, stream->seq);  //Media object number
676
    put_le32(pb, m_obj_offset); //Offset Into Media Object
677

    
678
    // Replicated Data shall be at least 8 bytes long.
679
    // The first 4 bytes of data shall contain the
680
    // Size of the Media Object that the payload belongs to.
681
    // The next 4 bytes of data shall contain the
682
    // Presentation Time for the media object that the payload belongs to.
683
    put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
684

    
685
    put_le32(pb, m_obj_size);       //Replicated Data - Media Object Size
686
    put_le32(pb, presentation_time);//Replicated Data - Presentation Time
687

    
688
    if (asf->multi_payloads_present){
689
        put_le16(pb, payload_len);   //payload length
690
    }
691
}
692

    
693
static void put_frame(
694
                    AVFormatContext *s,
695
                    ASFStream       *stream,
696
                    AVStream        *avst,
697
                    int             timestamp,
698
                    const uint8_t   *buf,
699
                    int             m_obj_size,
700
                    int             flags
701
                )
702
{
703
    ASFContext *asf = s->priv_data;
704
    int m_obj_offset, payload_len, frag_len1;
705

    
706
    m_obj_offset = 0;
707
    while (m_obj_offset < m_obj_size) {
708
        payload_len = m_obj_size - m_obj_offset;
709
        if (asf->packet_timestamp_start == -1) {
710
            asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
711

    
712
            asf->packet_size_left = PACKET_SIZE;
713
            if (asf->multi_payloads_present){
714
                frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
715
            }
716
            else {
717
                frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
718
            }
719
            asf->packet_timestamp_start = timestamp;
720
        }
721
        else {
722
            // multi payloads
723
            frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
724

    
725
            if(frag_len1 < payload_len && avst->codec->codec_type == AVMEDIA_TYPE_AUDIO){
726
                flush_packet(s);
727
                continue;
728
            }
729
        }
730
        if (frag_len1 > 0) {
731
            if (payload_len > frag_len1)
732
                payload_len = frag_len1;
733
            else if (payload_len == (frag_len1 - 1))
734
                payload_len = frag_len1 - 2;  //additional byte need to put padding length
735

    
736
            put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
737
            put_buffer(&asf->pb, buf, payload_len);
738

    
739
            if (asf->multi_payloads_present)
740
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
741
            else
742
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
743
            asf->packet_timestamp_end = timestamp;
744

    
745
            asf->packet_nb_payloads++;
746
        } else {
747
            payload_len = 0;
748
        }
749
        m_obj_offset += payload_len;
750
        buf += payload_len;
751

    
752
        if (!asf->multi_payloads_present)
753
            flush_packet(s);
754
        else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
755
            flush_packet(s);
756
    }
757
    stream->seq++;
758
}
759

    
760
static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
761
{
762
    ASFContext *asf = s->priv_data;
763
    ASFStream *stream;
764
    int64_t duration;
765
    AVCodecContext *codec;
766
    int64_t packet_st,pts;
767
    int start_sec,i;
768
    int flags= pkt->flags;
769

    
770
    codec = s->streams[pkt->stream_index]->codec;
771
    stream = &asf->streams[pkt->stream_index];
772

    
773
    if(codec->codec_type == AVMEDIA_TYPE_AUDIO)
774
        flags &= ~PKT_FLAG_KEY;
775

    
776
    pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
777
    assert(pts != AV_NOPTS_VALUE);
778
    duration = pts * 10000;
779
    asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000);
780

    
781
    packet_st = asf->nb_packets;
782
    put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
783

    
784
    /* check index */
785
    if ((!asf->is_streamed) && (flags & PKT_FLAG_KEY)) {
786
        start_sec = (int)(duration / INT64_C(10000000));
787
        if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
788
            for(i=asf->nb_index_count;i<start_sec;i++) {
789
                if (i>=asf->nb_index_memory_alloc) {
790
                    asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
791
                    asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
792
                }
793
                // store
794
                asf->index_ptr[i].packet_number = (uint32_t)packet_st;
795
                asf->index_ptr[i].packet_count  = (uint16_t)(asf->nb_packets-packet_st);
796
                asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
797
            }
798
            asf->nb_index_count = start_sec;
799
            asf->last_indexed_pts = duration;
800
        }
801
    }
802
    return 0;
803
}
804

    
805
//
806
static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
807
{
808
    ByteIOContext *pb = s->pb;
809
    int i;
810

    
811
    put_guid(pb, &ff_asf_simple_index_header);
812
    put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
813
    put_guid(pb, &ff_asf_my_guid);
814
    put_le64(pb, ASF_INDEXED_INTERVAL);
815
    put_le32(pb, max);
816
    put_le32(pb, count);
817
    for(i=0; i<count; i++) {
818
        put_le32(pb, index[i].packet_number);
819
        put_le16(pb, index[i].packet_count);
820
    }
821

    
822
    return 0;
823
}
824

    
825
static int asf_write_trailer(AVFormatContext *s)
826
{
827
    ASFContext *asf = s->priv_data;
828
    int64_t file_size,data_size;
829

    
830
    /* flush the current packet */
831
    if (asf->pb.buf_ptr > asf->pb.buffer)
832
        flush_packet(s);
833

    
834
    /* write index */
835
    data_size = url_ftell(s->pb);
836
    if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
837
        asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
838
    }
839
    put_flush_packet(s->pb);
840

    
841
    if (asf->is_streamed || url_is_streamed(s->pb)) {
842
        put_chunk(s, 0x4524, 0, 0); /* end of stream */
843
    } else {
844
        /* rewrite an updated header */
845
        file_size = url_ftell(s->pb);
846
        url_fseek(s->pb, 0, SEEK_SET);
847
        asf_write_header1(s, file_size, data_size - asf->data_offset);
848
    }
849

    
850
    put_flush_packet(s->pb);
851
    av_free(asf->index_ptr);
852
    return 0;
853
}
854

    
855
#if CONFIG_ASF_MUXER
856
AVOutputFormat asf_muxer = {
857
    "asf",
858
    NULL_IF_CONFIG_SMALL("ASF format"),
859
    "video/x-ms-asf",
860
    "asf,wmv,wma",
861
    sizeof(ASFContext),
862
#if CONFIG_LIBMP3LAME
863
    CODEC_ID_MP3,
864
#else
865
    CODEC_ID_MP2,
866
#endif
867
    CODEC_ID_MSMPEG4V3,
868
    asf_write_header,
869
    asf_write_packet,
870
    asf_write_trailer,
871
    .flags = AVFMT_GLOBALHEADER,
872
    .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0},
873
    .metadata_conv = ff_asf_metadata_conv,
874
};
875
#endif
876

    
877
#if CONFIG_ASF_STREAM_MUXER
878
AVOutputFormat asf_stream_muxer = {
879
    "asf_stream",
880
    NULL_IF_CONFIG_SMALL("ASF format"),
881
    "video/x-ms-asf",
882
    "asf,wmv,wma",
883
    sizeof(ASFContext),
884
#if CONFIG_LIBMP3LAME
885
    CODEC_ID_MP3,
886
#else
887
    CODEC_ID_MP2,
888
#endif
889
    CODEC_ID_MSMPEG4V3,
890
    asf_write_stream_header,
891
    asf_write_packet,
892
    asf_write_trailer,
893
    .flags = AVFMT_GLOBALHEADER,
894
    .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0},
895
    .metadata_conv = ff_asf_metadata_conv,
896
};
897
#endif //CONFIG_ASF_STREAM_MUXER