swfenc.c 16.3 KB
Newer Older
Fabrice Bellard's avatar
Fabrice Bellard committed
1
/*
2
 * Flash Compatible Streaming Format muxer
3 4
 * Copyright (c) 2000 Fabrice Bellard
 * Copyright (c) 2003 Tinic Uro
Fabrice Bellard's avatar
Fabrice Bellard committed
5
 *
6
 * This file is part of Libav.
7
 *
8
 * Libav is free software; you can redistribute it and/or
9 10
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
Fabrice Bellard's avatar
Fabrice Bellard committed
12
 *
13
 * Libav is distributed in the hope that it will be useful,
Fabrice Bellard's avatar
Fabrice Bellard committed
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 16
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
Fabrice Bellard's avatar
Fabrice Bellard committed
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with Libav; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Fabrice Bellard's avatar
Fabrice Bellard committed
21
 */
22

23
#include "libavcodec/put_bits.h"
Fabrice Bellard's avatar
Fabrice Bellard committed
24
#include "avformat.h"
Baptiste Coudurier's avatar
Baptiste Coudurier committed
25
#include "swf.h"
26

Fabrice Bellard's avatar
Fabrice Bellard committed
27 28 29
static void put_swf_tag(AVFormatContext *s, int tag)
{
    SWFContext *swf = s->priv_data;
30
    AVIOContext *pb = s->pb;
Fabrice Bellard's avatar
Fabrice Bellard committed
31

32
    swf->tag_pos = avio_tell(pb);
Fabrice Bellard's avatar
Fabrice Bellard committed
33 34 35
    swf->tag = tag;
    /* reserve some room for the tag */
    if (tag & TAG_LONG) {
36 37
        avio_wl16(pb, 0);
        avio_wl32(pb, 0);
Fabrice Bellard's avatar
Fabrice Bellard committed
38
    } else {
39
        avio_wl16(pb, 0);
Fabrice Bellard's avatar
Fabrice Bellard committed
40 41 42 43 44 45
    }
}

static void put_swf_end_tag(AVFormatContext *s)
{
    SWFContext *swf = s->priv_data;
46
    AVIOContext *pb = s->pb;
47
    int64_t pos;
Fabrice Bellard's avatar
Fabrice Bellard committed
48 49
    int tag_len, tag;

50
    pos = avio_tell(pb);
Fabrice Bellard's avatar
Fabrice Bellard committed
51 52
    tag_len = pos - swf->tag_pos - 2;
    tag = swf->tag;
53
    avio_seek(pb, swf->tag_pos, SEEK_SET);
Fabrice Bellard's avatar
Fabrice Bellard committed
54 55
    if (tag & TAG_LONG) {
        tag &= ~TAG_LONG;
56 57
        avio_wl16(pb, (tag << 6) | 0x3f);
        avio_wl32(pb, tag_len - 4);
Fabrice Bellard's avatar
Fabrice Bellard committed
58 59
    } else {
        assert(tag_len < 0x3f);
60
        avio_wl16(pb, (tag << 6) | tag_len);
Fabrice Bellard's avatar
Fabrice Bellard committed
61
    }
62
    avio_seek(pb, pos, SEEK_SET);
Fabrice Bellard's avatar
Fabrice Bellard committed
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
}

static inline void max_nbits(int *nbits_ptr, int val)
{
    int n;

    if (val == 0)
        return;
    val = abs(val);
    n = 1;
    while (val != 0) {
        n++;
        val >>= 1;
    }
    if (n > *nbits_ptr)
        *nbits_ptr = n;
}

81
static void put_swf_rect(AVIOContext *pb,
Fabrice Bellard's avatar
Fabrice Bellard committed
82 83 84
                         int xmin, int xmax, int ymin, int ymax)
{
    PutBitContext p;
85
    uint8_t buf[256];
Fabrice Bellard's avatar
Fabrice Bellard committed
86 87
    int nbits, mask;

Alex Beregszaszi's avatar
Alex Beregszaszi committed
88
    init_put_bits(&p, buf, sizeof(buf));
89

Fabrice Bellard's avatar
Fabrice Bellard committed
90 91 92 93 94 95 96 97 98 99 100 101 102
    nbits = 0;
    max_nbits(&nbits, xmin);
    max_nbits(&nbits, xmax);
    max_nbits(&nbits, ymin);
    max_nbits(&nbits, ymax);
    mask = (1 << nbits) - 1;

    /* rectangle info */
    put_bits(&p, 5, nbits);
    put_bits(&p, nbits, xmin & mask);
    put_bits(&p, nbits, xmax & mask);
    put_bits(&p, nbits, ymin & mask);
    put_bits(&p, nbits, ymax & mask);
103

Fabrice Bellard's avatar
Fabrice Bellard committed
104
    flush_put_bits(&p);
105
    avio_write(pb, buf, put_bits_ptr(&p) - p.buf);
Fabrice Bellard's avatar
Fabrice Bellard committed
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120
}

static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
{
    int nbits, mask;

    put_bits(pb, 1, 1); /* edge */
    put_bits(pb, 1, 1); /* line select */
    nbits = 2;
    max_nbits(&nbits, dx);
    max_nbits(&nbits, dy);

    mask = (1 << nbits) - 1;
    put_bits(pb, 4, nbits - 2); /* 16 bits precision */
    if (dx == 0) {
121 122 123
        put_bits(pb, 1, 0);
        put_bits(pb, 1, 1);
        put_bits(pb, nbits, dy & mask);
Fabrice Bellard's avatar
Fabrice Bellard committed
124
    } else if (dy == 0) {
125 126 127
        put_bits(pb, 1, 0);
        put_bits(pb, 1, 0);
        put_bits(pb, nbits, dx & mask);
Fabrice Bellard's avatar
Fabrice Bellard committed
128
    } else {
129 130 131
        put_bits(pb, 1, 1);
        put_bits(pb, nbits, dx & mask);
        put_bits(pb, nbits, dy & mask);
Fabrice Bellard's avatar
Fabrice Bellard committed
132 133 134 135 136
    }
}

#define FRAC_BITS 16

137
static void put_swf_matrix(AVIOContext *pb,
Fabrice Bellard's avatar
Fabrice Bellard committed
138 139 140
                           int a, int b, int c, int d, int tx, int ty)
{
    PutBitContext p;
141
    uint8_t buf[256];
142
    int nbits;
Fabrice Bellard's avatar
Fabrice Bellard committed
143

Alex Beregszaszi's avatar
Alex Beregszaszi committed
144
    init_put_bits(&p, buf, sizeof(buf));
145

Fabrice Bellard's avatar
Fabrice Bellard committed
146
    put_bits(&p, 1, 1); /* a, d present */
147 148 149 150 151 152
    nbits = 1;
    max_nbits(&nbits, a);
    max_nbits(&nbits, d);
    put_bits(&p, 5, nbits); /* nb bits */
    put_bits(&p, nbits, a);
    put_bits(&p, nbits, d);
153

Fabrice Bellard's avatar
Fabrice Bellard committed
154
    put_bits(&p, 1, 1); /* b, c present */
155 156 157 158 159 160 161 162 163 164 165 166 167
    nbits = 1;
    max_nbits(&nbits, c);
    max_nbits(&nbits, b);
    put_bits(&p, 5, nbits); /* nb bits */
    put_bits(&p, nbits, c);
    put_bits(&p, nbits, b);

    nbits = 1;
    max_nbits(&nbits, tx);
    max_nbits(&nbits, ty);
    put_bits(&p, 5, nbits); /* nb bits */
    put_bits(&p, nbits, tx);
    put_bits(&p, nbits, ty);
Fabrice Bellard's avatar
Fabrice Bellard committed
168 169

    flush_put_bits(&p);
170
    avio_write(pb, buf, put_bits_ptr(&p) - p.buf);
Fabrice Bellard's avatar
Fabrice Bellard committed
171 172 173 174
}

static int swf_write_header(AVFormatContext *s)
{
175
    SWFContext *swf = s->priv_data;
176
    AVIOContext *pb = s->pb;
Fabrice Bellard's avatar
Fabrice Bellard committed
177
    PutBitContext p;
178
    uint8_t buf1[256];
179
    int i, width, height, rate, rate_base;
180
    int version;
Fabrice Bellard's avatar
Fabrice Bellard committed
181

182 183 184 185
    swf->sound_samples = 0;
    swf->swf_frame_number = 0;
    swf->video_frame_number = 0;

Fabrice Bellard's avatar
Fabrice Bellard committed
186
    for(i=0;i<s->nb_streams;i++) {
187
        AVCodecContext *enc = s->streams[i]->codec;
188
        if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
189 190 191 192
            if (swf->audio_enc) {
                av_log(s, AV_LOG_ERROR, "SWF muxer only supports 1 audio stream\n");
                return AVERROR_INVALIDDATA;
            }
193
            if (enc->codec_id == AV_CODEC_ID_MP3) {
194
                swf->audio_enc = enc;
195
                swf->audio_fifo= av_fifo_alloc(AUDIO_FIFO_SIZE);
196 197
                if (!swf->audio_fifo)
                    return AVERROR(ENOMEM);
Baptiste Coudurier's avatar
Baptiste Coudurier committed
198
            } else {
199
                av_log(s, AV_LOG_ERROR, "SWF muxer only supports MP3\n");
Baptiste Coudurier's avatar
Baptiste Coudurier committed
200 201 202
                return -1;
            }
        } else {
203 204 205 206
            if (swf->video_enc) {
                av_log(s, AV_LOG_ERROR, "SWF muxer only supports 1 video stream\n");
                return AVERROR_INVALIDDATA;
            }
207 208 209
            if (enc->codec_id == AV_CODEC_ID_VP6F ||
                enc->codec_id == AV_CODEC_ID_FLV1 ||
                enc->codec_id == AV_CODEC_ID_MJPEG) {
210
                swf->video_enc = enc;
211
            } else {
212
                av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n");
213 214 215
                return -1;
            }
        }
Fabrice Bellard's avatar
Fabrice Bellard committed
216 217
    }

218
    if (!swf->video_enc) {
219
        /* currently, cannot work correctly if audio only */
Fabrice Bellard's avatar
Fabrice Bellard committed
220 221
        width = 320;
        height = 200;
222 223
        rate = 10;
        rate_base= 1;
Fabrice Bellard's avatar
Fabrice Bellard committed
224
    } else {
225 226 227 228
        width = swf->video_enc->width;
        height = swf->video_enc->height;
        rate = swf->video_enc->time_base.den;
        rate_base = swf->video_enc->time_base.num;
Fabrice Bellard's avatar
Fabrice Bellard committed
229 230
    }

231
    if (!swf->audio_enc)
232
        swf->samples_per_frame = (44100.0 * rate_base) / rate;
233 234
    else
        swf->samples_per_frame = (swf->audio_enc->sample_rate * rate_base) / rate;
235

236
    avio_write(pb, "FWS", 3);
237 238 239

    if (!strcmp("avm2", s->oformat->name))
        version = 9;
240
    else if (swf->video_enc && swf->video_enc->codec_id == AV_CODEC_ID_VP6F)
241
        version = 8; /* version 8 and above support VP6 codec */
242
    else if (swf->video_enc && swf->video_enc->codec_id == AV_CODEC_ID_FLV1)
243
        version = 6; /* version 6 and above support FLV1 codec */
244
    else
245
        version = 4; /* version 4 for mpeg audio support */
246
    avio_w8(pb, version);
247

248
    avio_wl32(pb, DUMMY_FILE_SIZE); /* dummy size
249
                                      (will be patched if not streamed) */
Fabrice Bellard's avatar
Fabrice Bellard committed
250

251
    put_swf_rect(pb, 0, width * 20, 0, height * 20);
252
    avio_wl16(pb, (rate * 256) / rate_base); /* frame rate */
253
    swf->duration_pos = avio_tell(pb);
254
    avio_wl16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */
255

256
    /* avm2/swf v9 (also v8?) files require a file attribute tag */
257
    if (version == 9) {
258
        put_swf_tag(s, TAG_FILEATTRIBUTES);
259
        avio_wl32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */
260 261 262
        put_swf_end_tag(s);
    }

Fabrice Bellard's avatar
Fabrice Bellard committed
263
    /* define a shape with the jpeg inside */
264
    if (swf->video_enc && swf->video_enc->codec_id == AV_CODEC_ID_MJPEG) {
265 266
        put_swf_tag(s, TAG_DEFINESHAPE);

267
        avio_wl16(pb, SHAPE_ID); /* ID of shape */
268 269 270
        /* bounding rectangle */
        put_swf_rect(pb, 0, width, 0, height);
        /* style info */
271 272 273
        avio_w8(pb, 1); /* one fill style */
        avio_w8(pb, 0x41); /* clipped bitmap fill */
        avio_wl16(pb, BITMAP_ID); /* bitmap ID */
274
        /* position of the bitmap */
275
        put_swf_matrix(pb, (int)(1.0 * (1 << FRAC_BITS)), 0,
276
                       0, (int)(1.0 * (1 << FRAC_BITS)), 0, 0);
277
        avio_w8(pb, 0); /* no line style */
278

279 280 281 282
        /* shape drawing */
        init_put_bits(&p, buf1, sizeof(buf1));
        put_bits(&p, 4, 1); /* one fill bit */
        put_bits(&p, 4, 0); /* zero line bit */
283

284 285 286 287 288 289
        put_bits(&p, 1, 0); /* not an edge */
        put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0);
        put_bits(&p, 5, 1); /* nbits */
        put_bits(&p, 1, 0); /* X */
        put_bits(&p, 1, 0); /* Y */
        put_bits(&p, 1, 1); /* set fill style 1 */
290

291 292 293 294 295
        /* draw the rectangle ! */
        put_swf_line_edge(&p, width, 0);
        put_swf_line_edge(&p, 0, height);
        put_swf_line_edge(&p, -width, 0);
        put_swf_line_edge(&p, 0, -height);
296

297 298 299
        /* end of shape */
        put_bits(&p, 1, 0); /* not an edge */
        put_bits(&p, 5, 0);
Fabrice Bellard's avatar
Fabrice Bellard committed
300

301
        flush_put_bits(&p);
302
        avio_write(pb, buf1, put_bits_ptr(&p) - p.buf);
Fabrice Bellard's avatar
Fabrice Bellard committed
303

304 305
        put_swf_end_tag(s);
    }
306

307
    if (swf->audio_enc && swf->audio_enc->codec_id == AV_CODEC_ID_MP3) {
308
        int v = 0;
Fabrice Bellard's avatar
Fabrice Bellard committed
309 310

        /* start sound */
311
        put_swf_tag(s, TAG_STREAMHEAD2);
312
        switch(swf->audio_enc->sample_rate) {
Baptiste Coudurier's avatar
Baptiste Coudurier committed
313 314 315
        case 11025: v |= 1 << 2; break;
        case 22050: v |= 2 << 2; break;
        case 44100: v |= 3 << 2; break;
Fabrice Bellard's avatar
Fabrice Bellard committed
316 317
        default:
            /* not supported */
Diego Biurrun's avatar
Diego Biurrun committed
318
            av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n");
Fabrice Bellard's avatar
Fabrice Bellard committed
319 320
            return -1;
        }
321
        v |= 0x02; /* 16 bit playback */
322
        if (swf->audio_enc->channels == 2)
323
            v |= 0x01; /* stereo playback */
324
        avio_w8(s->pb, v);
Fabrice Bellard's avatar
Fabrice Bellard committed
325
        v |= 0x20; /* mp3 compressed */
326 327 328
        avio_w8(s->pb, v);
        avio_wl16(s->pb, swf->samples_per_frame);  /* avg samples per frame */
        avio_wl16(s->pb, 0);
329

Fabrice Bellard's avatar
Fabrice Bellard committed
330 331 332
        put_swf_end_tag(s);
    }

333
    avio_flush(s->pb);
Fabrice Bellard's avatar
Fabrice Bellard committed
334 335 336
    return 0;
}

337
static int swf_write_video(AVFormatContext *s,
338
                           AVCodecContext *enc, const uint8_t *buf, int size)
Fabrice Bellard's avatar
Fabrice Bellard committed
339
{
340
    SWFContext *swf = s->priv_data;
341
    AVIOContext *pb = s->pb;
342

343
    /* Flash Player limit */
344
    if (swf->swf_frame_number == 16000)
345
        av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
Fabrice Bellard's avatar
Fabrice Bellard committed
346

347 348
    if (enc->codec_id == AV_CODEC_ID_VP6F ||
        enc->codec_id == AV_CODEC_ID_FLV1) {
349
        if (swf->video_frame_number == 0) {
350 351
            /* create a new video object */
            put_swf_tag(s, TAG_VIDEOSTREAM);
352
            avio_wl16(pb, VIDEO_ID);
353
            swf->vframes_pos = avio_tell(pb);
354 355 356 357
            avio_wl16(pb, 15000); /* hard flash player limit */
            avio_wl16(pb, enc->width);
            avio_wl16(pb, enc->height);
            avio_w8(pb, 0);
358
            avio_w8(pb,ff_codec_get_tag(ff_swf_codec_tags, enc->codec_id));
359 360 361 362
            put_swf_end_tag(s);

            /* place the video object for the first time */
            put_swf_tag(s, TAG_PLACEOBJECT2);
363 364 365
            avio_w8(pb, 0x36);
            avio_wl16(pb, 1);
            avio_wl16(pb, VIDEO_ID);
366
            put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0);
367
            avio_wl16(pb, swf->video_frame_number);
368
            avio_write(pb, "video", 5);
369
            avio_w8(pb, 0x00);
370 371 372 373
            put_swf_end_tag(s);
        } else {
            /* mark the character for update */
            put_swf_tag(s, TAG_PLACEOBJECT2);
374 375 376
            avio_w8(pb, 0x11);
            avio_wl16(pb, 1);
            avio_wl16(pb, swf->video_frame_number);
377 378
            put_swf_end_tag(s);
        }
379

380 381
        /* set video frame data */
        put_swf_tag(s, TAG_VIDEOFRAME | TAG_LONG);
382 383 384
        avio_wl16(pb, VIDEO_ID);
        avio_wl16(pb, swf->video_frame_number++);
        avio_write(pb, buf, size);
385
        put_swf_end_tag(s);
386
    } else if (enc->codec_id == AV_CODEC_ID_MJPEG) {
387 388 389
        if (swf->swf_frame_number > 0) {
            /* remove the shape */
            put_swf_tag(s, TAG_REMOVEOBJECT);
390 391
            avio_wl16(pb, SHAPE_ID); /* shape ID */
            avio_wl16(pb, 1); /* depth */
392 393 394 395
            put_swf_end_tag(s);

            /* free the bitmap */
            put_swf_tag(s, TAG_FREECHARACTER);
396
            avio_wl16(pb, BITMAP_ID);
397 398
            put_swf_end_tag(s);
        }
399

400
        put_swf_tag(s, TAG_JPEG2 | TAG_LONG);
401

402
        avio_wl16(pb, BITMAP_ID); /* ID of the image */
403

404
        /* a dummy jpeg header seems to be required */
405
        avio_wb32(pb, 0xffd8ffd9);
406
        /* write the jpeg image */
407
        avio_write(pb, buf, size);
408

409
        put_swf_end_tag(s);
410

411
        /* draw the shape */
412

413
        put_swf_tag(s, TAG_PLACEOBJECT);
414 415
        avio_wl16(pb, SHAPE_ID); /* shape ID */
        avio_wl16(pb, 1); /* depth */
416 417 418
        put_swf_matrix(pb, 20 << FRAC_BITS, 0, 0, 20 << FRAC_BITS, 0, 0);
        put_swf_end_tag(s);
    }
419

Baptiste Coudurier's avatar
Baptiste Coudurier committed
420
    swf->swf_frame_number++;
Fabrice Bellard's avatar
Fabrice Bellard committed
421

422
    /* streaming sound always should be placed just before showframe tags */
423 424
    if (swf->audio_enc && av_fifo_size(swf->audio_fifo)) {
        int frame_size = av_fifo_size(swf->audio_fifo);
425
        put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
426 427 428
        avio_wl16(pb, swf->sound_samples);
        avio_wl16(pb, 0); // seek samples
        av_fifo_generic_read(swf->audio_fifo, pb, frame_size, &avio_write);
429
        put_swf_end_tag(s);
430

431
        /* update FIFO */
Baptiste Coudurier's avatar
Baptiste Coudurier committed
432
        swf->sound_samples = 0;
433 434
    }

Fabrice Bellard's avatar
Fabrice Bellard committed
435 436 437
    /* output the frame */
    put_swf_tag(s, TAG_SHOWFRAME);
    put_swf_end_tag(s);
438

Fabrice Bellard's avatar
Fabrice Bellard committed
439 440 441
    return 0;
}

442
static int swf_write_audio(AVFormatContext *s,
443
                           AVCodecContext *enc, uint8_t *buf, int size)
Fabrice Bellard's avatar
Fabrice Bellard committed
444
{
445
    SWFContext *swf = s->priv_data;
Fabrice Bellard's avatar
Fabrice Bellard committed
446

447
    /* Flash Player limit */
448
    if (swf->swf_frame_number == 16000)
449
        av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
450

451
    if (av_fifo_size(swf->audio_fifo) + size > AUDIO_FIFO_SIZE) {
Baptiste Coudurier's avatar
Baptiste Coudurier committed
452 453
        av_log(s, AV_LOG_ERROR, "audio fifo too small to mux audio essence\n");
        return -1;
454 455
    }

456
    av_fifo_generic_write(swf->audio_fifo, buf, size, NULL);
457
    swf->sound_samples += av_get_audio_frame_duration(enc, size);
Baptiste Coudurier's avatar
Baptiste Coudurier committed
458

459
    /* if audio only stream make sure we add swf frames */
460
    if (!swf->video_enc)
461
        swf_write_video(s, enc, 0, 0);
Fabrice Bellard's avatar
Fabrice Bellard committed
462 463 464 465

    return 0;
}

466
static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
Fabrice Bellard's avatar
Fabrice Bellard committed
467
{
468
    AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
469
    if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
470
        return swf_write_audio(s, codec, pkt->data, pkt->size);
Fabrice Bellard's avatar
Fabrice Bellard committed
471
    else
472
        return swf_write_video(s, codec, pkt->data, pkt->size);
Fabrice Bellard's avatar
Fabrice Bellard committed
473 474 475 476 477
}

static int swf_write_trailer(AVFormatContext *s)
{
    SWFContext *swf = s->priv_data;
478
    AVIOContext *pb = s->pb;
Fabrice Bellard's avatar
Fabrice Bellard committed
479 480 481 482 483
    AVCodecContext *enc, *video_enc;
    int file_size, i;

    video_enc = NULL;
    for(i=0;i<s->nb_streams;i++) {
484
        enc = s->streams[i]->codec;
485
        if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
Fabrice Bellard's avatar
Fabrice Bellard committed
486
            video_enc = enc;
Baptiste Coudurier's avatar
Baptiste Coudurier committed
487
        else
488
            av_fifo_free(swf->audio_fifo);
Fabrice Bellard's avatar
Fabrice Bellard committed
489 490 491 492
    }

    put_swf_tag(s, TAG_END);
    put_swf_end_tag(s);
493

Fabrice Bellard's avatar
Fabrice Bellard committed
494
    /* patch file size and number of frames if not streamed */
495
    if (s->pb->seekable && video_enc) {
496
        file_size = avio_tell(pb);
497
        avio_seek(pb, 4, SEEK_SET);
498
        avio_wl32(pb, file_size);
499
        avio_seek(pb, swf->duration_pos, SEEK_SET);
500
        avio_wl16(pb, swf->video_frame_number);
501
        avio_seek(pb, swf->vframes_pos, SEEK_SET);
502
        avio_wl16(pb, swf->video_frame_number);
503
        avio_seek(pb, file_size, SEEK_SET);
Fabrice Bellard's avatar
Fabrice Bellard committed
504 505 506 507
    }
    return 0;
}

508
#if CONFIG_SWF_MUXER
509
AVOutputFormat ff_swf_muxer = {
510
    .name              = "swf",
511
    .long_name         = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
512 513 514
    .mime_type         = "application/x-shockwave-flash",
    .extensions        = "swf",
    .priv_data_size    = sizeof(SWFContext),
515 516
    .audio_codec       = AV_CODEC_ID_MP3,
    .video_codec       = AV_CODEC_ID_FLV1,
517 518 519
    .write_header      = swf_write_header,
    .write_packet      = swf_write_packet,
    .write_trailer     = swf_write_trailer,
520
    .flags             = AVFMT_TS_NONSTRICT,
Fabrice Bellard's avatar
Fabrice Bellard committed
521
};
522
#endif
523
#if CONFIG_AVM2_MUXER
524
AVOutputFormat ff_avm2_muxer = {
525
    .name              = "avm2",
526
    .long_name         = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash) (AVM2)"),
527 528
    .mime_type         = "application/x-shockwave-flash",
    .priv_data_size    = sizeof(SWFContext),
529 530
    .audio_codec       = AV_CODEC_ID_MP3,
    .video_codec       = AV_CODEC_ID_FLV1,
531 532 533
    .write_header      = swf_write_header,
    .write_packet      = swf_write_packet,
    .write_trailer     = swf_write_trailer,
534
    .flags             = AVFMT_TS_NONSTRICT,
535 536
};
#endif