| 1 | /* |
| 2 | * Flash Compatible Streaming Format muxer |
| 3 | * Copyright (c) 2000 Fabrice Bellard |
| 4 | * Copyright (c) 2003 Tinic Uro |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #include "libavcodec/put_bits.h" |
| 24 | #include "libavutil/avassert.h" |
| 25 | #include "avformat.h" |
| 26 | #include "swf.h" |
| 27 | |
| 28 | static void put_swf_tag(AVFormatContext *s, int tag) |
| 29 | { |
| 30 | SWFContext *swf = s->priv_data; |
| 31 | AVIOContext *pb = s->pb; |
| 32 | |
| 33 | swf->tag_pos = avio_tell(pb); |
| 34 | swf->tag = tag; |
| 35 | /* reserve some room for the tag */ |
| 36 | if (tag & TAG_LONG) { |
| 37 | avio_wl16(pb, 0); |
| 38 | avio_wl32(pb, 0); |
| 39 | } else { |
| 40 | avio_wl16(pb, 0); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | static void put_swf_end_tag(AVFormatContext *s) |
| 45 | { |
| 46 | SWFContext *swf = s->priv_data; |
| 47 | AVIOContext *pb = s->pb; |
| 48 | int64_t pos; |
| 49 | int tag_len, tag; |
| 50 | |
| 51 | pos = avio_tell(pb); |
| 52 | tag_len = pos - swf->tag_pos - 2; |
| 53 | tag = swf->tag; |
| 54 | avio_seek(pb, swf->tag_pos, SEEK_SET); |
| 55 | if (tag & TAG_LONG) { |
| 56 | tag &= ~TAG_LONG; |
| 57 | avio_wl16(pb, (tag << 6) | 0x3f); |
| 58 | avio_wl32(pb, tag_len - 4); |
| 59 | } else { |
| 60 | av_assert0(tag_len < 0x3f); |
| 61 | avio_wl16(pb, (tag << 6) | tag_len); |
| 62 | } |
| 63 | avio_seek(pb, pos, SEEK_SET); |
| 64 | } |
| 65 | |
| 66 | static inline void max_nbits(int *nbits_ptr, int val) |
| 67 | { |
| 68 | int n; |
| 69 | |
| 70 | if (val == 0) |
| 71 | return; |
| 72 | val = abs(val); |
| 73 | n = 1; |
| 74 | while (val != 0) { |
| 75 | n++; |
| 76 | val >>= 1; |
| 77 | } |
| 78 | if (n > *nbits_ptr) |
| 79 | *nbits_ptr = n; |
| 80 | } |
| 81 | |
| 82 | static void put_swf_rect(AVIOContext *pb, |
| 83 | int xmin, int xmax, int ymin, int ymax) |
| 84 | { |
| 85 | PutBitContext p; |
| 86 | uint8_t buf[256]; |
| 87 | int nbits, mask; |
| 88 | |
| 89 | init_put_bits(&p, buf, sizeof(buf)); |
| 90 | |
| 91 | nbits = 0; |
| 92 | max_nbits(&nbits, xmin); |
| 93 | max_nbits(&nbits, xmax); |
| 94 | max_nbits(&nbits, ymin); |
| 95 | max_nbits(&nbits, ymax); |
| 96 | mask = (1 << nbits) - 1; |
| 97 | |
| 98 | /* rectangle info */ |
| 99 | put_bits(&p, 5, nbits); |
| 100 | put_bits(&p, nbits, xmin & mask); |
| 101 | put_bits(&p, nbits, xmax & mask); |
| 102 | put_bits(&p, nbits, ymin & mask); |
| 103 | put_bits(&p, nbits, ymax & mask); |
| 104 | |
| 105 | flush_put_bits(&p); |
| 106 | avio_write(pb, buf, put_bits_ptr(&p) - p.buf); |
| 107 | } |
| 108 | |
| 109 | static void put_swf_line_edge(PutBitContext *pb, int dx, int dy) |
| 110 | { |
| 111 | int nbits, mask; |
| 112 | |
| 113 | put_bits(pb, 1, 1); /* edge */ |
| 114 | put_bits(pb, 1, 1); /* line select */ |
| 115 | nbits = 2; |
| 116 | max_nbits(&nbits, dx); |
| 117 | max_nbits(&nbits, dy); |
| 118 | |
| 119 | mask = (1 << nbits) - 1; |
| 120 | put_bits(pb, 4, nbits - 2); /* 16 bits precision */ |
| 121 | if (dx == 0) { |
| 122 | put_bits(pb, 1, 0); |
| 123 | put_bits(pb, 1, 1); |
| 124 | put_bits(pb, nbits, dy & mask); |
| 125 | } else if (dy == 0) { |
| 126 | put_bits(pb, 1, 0); |
| 127 | put_bits(pb, 1, 0); |
| 128 | put_bits(pb, nbits, dx & mask); |
| 129 | } else { |
| 130 | put_bits(pb, 1, 1); |
| 131 | put_bits(pb, nbits, dx & mask); |
| 132 | put_bits(pb, nbits, dy & mask); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | #define FRAC_BITS 16 |
| 137 | |
| 138 | static void put_swf_matrix(AVIOContext *pb, |
| 139 | int a, int b, int c, int d, int tx, int ty) |
| 140 | { |
| 141 | PutBitContext p; |
| 142 | uint8_t buf[256]; |
| 143 | int nbits; |
| 144 | |
| 145 | init_put_bits(&p, buf, sizeof(buf)); |
| 146 | |
| 147 | put_bits(&p, 1, 1); /* a, d present */ |
| 148 | nbits = 1; |
| 149 | max_nbits(&nbits, a); |
| 150 | max_nbits(&nbits, d); |
| 151 | put_bits(&p, 5, nbits); /* nb bits */ |
| 152 | put_bits(&p, nbits, a); |
| 153 | put_bits(&p, nbits, d); |
| 154 | |
| 155 | put_bits(&p, 1, 1); /* b, c present */ |
| 156 | nbits = 1; |
| 157 | max_nbits(&nbits, c); |
| 158 | max_nbits(&nbits, b); |
| 159 | put_bits(&p, 5, nbits); /* nb bits */ |
| 160 | put_bits(&p, nbits, c); |
| 161 | put_bits(&p, nbits, b); |
| 162 | |
| 163 | nbits = 1; |
| 164 | max_nbits(&nbits, tx); |
| 165 | max_nbits(&nbits, ty); |
| 166 | put_bits(&p, 5, nbits); /* nb bits */ |
| 167 | put_bits(&p, nbits, tx); |
| 168 | put_bits(&p, nbits, ty); |
| 169 | |
| 170 | flush_put_bits(&p); |
| 171 | avio_write(pb, buf, put_bits_ptr(&p) - p.buf); |
| 172 | } |
| 173 | |
| 174 | static int swf_write_header(AVFormatContext *s) |
| 175 | { |
| 176 | SWFContext *swf = s->priv_data; |
| 177 | AVIOContext *pb = s->pb; |
| 178 | PutBitContext p; |
| 179 | uint8_t buf1[256]; |
| 180 | int i, width, height, rate, rate_base; |
| 181 | int version; |
| 182 | |
| 183 | swf->sound_samples = 0; |
| 184 | swf->swf_frame_number = 0; |
| 185 | swf->video_frame_number = 0; |
| 186 | |
| 187 | for(i=0;i<s->nb_streams;i++) { |
| 188 | AVCodecContext *enc = s->streams[i]->codec; |
| 189 | if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 190 | if (swf->audio_enc) { |
| 191 | av_log(s, AV_LOG_ERROR, "SWF muxer only supports 1 audio stream\n"); |
| 192 | return AVERROR_INVALIDDATA; |
| 193 | } |
| 194 | if (enc->codec_id == AV_CODEC_ID_MP3) { |
| 195 | if (!enc->frame_size) { |
| 196 | av_log(s, AV_LOG_ERROR, "audio frame size not set\n"); |
| 197 | return -1; |
| 198 | } |
| 199 | swf->audio_enc = enc; |
| 200 | swf->audio_fifo= av_fifo_alloc(AUDIO_FIFO_SIZE); |
| 201 | if (!swf->audio_fifo) |
| 202 | return AVERROR(ENOMEM); |
| 203 | } else { |
| 204 | av_log(s, AV_LOG_ERROR, "SWF muxer only supports MP3\n"); |
| 205 | return -1; |
| 206 | } |
| 207 | } else { |
| 208 | if (swf->video_enc) { |
| 209 | av_log(s, AV_LOG_ERROR, "SWF muxer only supports 1 video stream\n"); |
| 210 | return AVERROR_INVALIDDATA; |
| 211 | } |
| 212 | if (enc->codec_id == AV_CODEC_ID_VP6F || |
| 213 | enc->codec_id == AV_CODEC_ID_FLV1 || |
| 214 | enc->codec_id == AV_CODEC_ID_MJPEG) { |
| 215 | swf->video_st = s->streams[i]; |
| 216 | swf->video_enc = enc; |
| 217 | } else { |
| 218 | av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n"); |
| 219 | return -1; |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | if (!swf->video_enc) { |
| 225 | /* currently, cannot work correctly if audio only */ |
| 226 | width = 320; |
| 227 | height = 200; |
| 228 | rate = 10; |
| 229 | rate_base= 1; |
| 230 | } else { |
| 231 | width = swf->video_enc->width; |
| 232 | height = swf->video_enc->height; |
| 233 | // TODO: should be avg_frame_rate |
| 234 | rate = swf->video_st->time_base.den; |
| 235 | rate_base = swf->video_st->time_base.num; |
| 236 | } |
| 237 | |
| 238 | if (!swf->audio_enc) |
| 239 | swf->samples_per_frame = (44100.0 * rate_base) / rate; |
| 240 | else |
| 241 | swf->samples_per_frame = (swf->audio_enc->sample_rate * rate_base) / rate; |
| 242 | |
| 243 | avio_write(pb, "FWS", 3); |
| 244 | |
| 245 | if (!strcmp("avm2", s->oformat->name)) |
| 246 | version = 9; |
| 247 | else if (swf->video_enc && swf->video_enc->codec_id == AV_CODEC_ID_VP6F) |
| 248 | version = 8; /* version 8 and above support VP6 codec */ |
| 249 | else if (swf->video_enc && swf->video_enc->codec_id == AV_CODEC_ID_FLV1) |
| 250 | version = 6; /* version 6 and above support FLV1 codec */ |
| 251 | else |
| 252 | version = 4; /* version 4 for mpeg audio support */ |
| 253 | avio_w8(pb, version); |
| 254 | |
| 255 | avio_wl32(pb, DUMMY_FILE_SIZE); /* dummy size |
| 256 | (will be patched if not streamed) */ |
| 257 | |
| 258 | put_swf_rect(pb, 0, width * 20, 0, height * 20); |
| 259 | avio_wl16(pb, (rate * 256) / rate_base); /* frame rate */ |
| 260 | swf->duration_pos = avio_tell(pb); |
| 261 | avio_wl16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */ |
| 262 | |
| 263 | /* avm2/swf v9 (also v8?) files require a file attribute tag */ |
| 264 | if (version == 9) { |
| 265 | put_swf_tag(s, TAG_FILEATTRIBUTES); |
| 266 | avio_wl32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */ |
| 267 | put_swf_end_tag(s); |
| 268 | } |
| 269 | |
| 270 | /* define a shape with the jpeg inside */ |
| 271 | if (swf->video_enc && swf->video_enc->codec_id == AV_CODEC_ID_MJPEG) { |
| 272 | put_swf_tag(s, TAG_DEFINESHAPE); |
| 273 | |
| 274 | avio_wl16(pb, SHAPE_ID); /* ID of shape */ |
| 275 | /* bounding rectangle */ |
| 276 | put_swf_rect(pb, 0, width, 0, height); |
| 277 | /* style info */ |
| 278 | avio_w8(pb, 1); /* one fill style */ |
| 279 | avio_w8(pb, 0x41); /* clipped bitmap fill */ |
| 280 | avio_wl16(pb, BITMAP_ID); /* bitmap ID */ |
| 281 | /* position of the bitmap */ |
| 282 | put_swf_matrix(pb, (int)(1.0 * (1 << FRAC_BITS)), 0, |
| 283 | 0, (int)(1.0 * (1 << FRAC_BITS)), 0, 0); |
| 284 | avio_w8(pb, 0); /* no line style */ |
| 285 | |
| 286 | /* shape drawing */ |
| 287 | init_put_bits(&p, buf1, sizeof(buf1)); |
| 288 | put_bits(&p, 4, 1); /* one fill bit */ |
| 289 | put_bits(&p, 4, 0); /* zero line bit */ |
| 290 | |
| 291 | put_bits(&p, 1, 0); /* not an edge */ |
| 292 | put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0); |
| 293 | put_bits(&p, 5, 1); /* nbits */ |
| 294 | put_bits(&p, 1, 0); /* X */ |
| 295 | put_bits(&p, 1, 0); /* Y */ |
| 296 | put_bits(&p, 1, 1); /* set fill style 1 */ |
| 297 | |
| 298 | /* draw the rectangle ! */ |
| 299 | put_swf_line_edge(&p, width, 0); |
| 300 | put_swf_line_edge(&p, 0, height); |
| 301 | put_swf_line_edge(&p, -width, 0); |
| 302 | put_swf_line_edge(&p, 0, -height); |
| 303 | |
| 304 | /* end of shape */ |
| 305 | put_bits(&p, 1, 0); /* not an edge */ |
| 306 | put_bits(&p, 5, 0); |
| 307 | |
| 308 | flush_put_bits(&p); |
| 309 | avio_write(pb, buf1, put_bits_ptr(&p) - p.buf); |
| 310 | |
| 311 | put_swf_end_tag(s); |
| 312 | } |
| 313 | |
| 314 | if (swf->audio_enc && swf->audio_enc->codec_id == AV_CODEC_ID_MP3) { |
| 315 | int v = 0; |
| 316 | |
| 317 | /* start sound */ |
| 318 | put_swf_tag(s, TAG_STREAMHEAD2); |
| 319 | switch(swf->audio_enc->sample_rate) { |
| 320 | case 11025: v |= 1 << 2; break; |
| 321 | case 22050: v |= 2 << 2; break; |
| 322 | case 44100: v |= 3 << 2; break; |
| 323 | default: |
| 324 | /* not supported */ |
| 325 | av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n"); |
| 326 | return -1; |
| 327 | } |
| 328 | v |= 0x02; /* 16 bit playback */ |
| 329 | if (swf->audio_enc->channels == 2) |
| 330 | v |= 0x01; /* stereo playback */ |
| 331 | avio_w8(s->pb, v); |
| 332 | v |= 0x20; /* mp3 compressed */ |
| 333 | avio_w8(s->pb, v); |
| 334 | avio_wl16(s->pb, swf->samples_per_frame); /* avg samples per frame */ |
| 335 | avio_wl16(s->pb, 0); |
| 336 | |
| 337 | put_swf_end_tag(s); |
| 338 | } |
| 339 | |
| 340 | avio_flush(s->pb); |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | static int swf_write_video(AVFormatContext *s, |
| 345 | AVCodecContext *enc, const uint8_t *buf, int size) |
| 346 | { |
| 347 | SWFContext *swf = s->priv_data; |
| 348 | AVIOContext *pb = s->pb; |
| 349 | |
| 350 | /* Flash Player limit */ |
| 351 | if (swf->swf_frame_number == 16000) |
| 352 | av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n"); |
| 353 | |
| 354 | if (enc->codec_id == AV_CODEC_ID_VP6F || |
| 355 | enc->codec_id == AV_CODEC_ID_FLV1) { |
| 356 | if (swf->video_frame_number == 0) { |
| 357 | /* create a new video object */ |
| 358 | put_swf_tag(s, TAG_VIDEOSTREAM); |
| 359 | avio_wl16(pb, VIDEO_ID); |
| 360 | swf->vframes_pos = avio_tell(pb); |
| 361 | avio_wl16(pb, 15000); /* hard flash player limit */ |
| 362 | avio_wl16(pb, enc->width); |
| 363 | avio_wl16(pb, enc->height); |
| 364 | avio_w8(pb, 0); |
| 365 | avio_w8(pb,ff_codec_get_tag(ff_swf_codec_tags, enc->codec_id)); |
| 366 | put_swf_end_tag(s); |
| 367 | |
| 368 | /* place the video object for the first time */ |
| 369 | put_swf_tag(s, TAG_PLACEOBJECT2); |
| 370 | avio_w8(pb, 0x36); |
| 371 | avio_wl16(pb, 1); |
| 372 | avio_wl16(pb, VIDEO_ID); |
| 373 | put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0); |
| 374 | avio_wl16(pb, swf->video_frame_number); |
| 375 | avio_write(pb, "video", 5); |
| 376 | avio_w8(pb, 0x00); |
| 377 | put_swf_end_tag(s); |
| 378 | } else { |
| 379 | /* mark the character for update */ |
| 380 | put_swf_tag(s, TAG_PLACEOBJECT2); |
| 381 | avio_w8(pb, 0x11); |
| 382 | avio_wl16(pb, 1); |
| 383 | avio_wl16(pb, swf->video_frame_number); |
| 384 | put_swf_end_tag(s); |
| 385 | } |
| 386 | |
| 387 | /* set video frame data */ |
| 388 | put_swf_tag(s, TAG_VIDEOFRAME | TAG_LONG); |
| 389 | avio_wl16(pb, VIDEO_ID); |
| 390 | avio_wl16(pb, swf->video_frame_number++); |
| 391 | avio_write(pb, buf, size); |
| 392 | put_swf_end_tag(s); |
| 393 | } else if (enc->codec_id == AV_CODEC_ID_MJPEG) { |
| 394 | if (swf->swf_frame_number > 0) { |
| 395 | /* remove the shape */ |
| 396 | put_swf_tag(s, TAG_REMOVEOBJECT); |
| 397 | avio_wl16(pb, SHAPE_ID); /* shape ID */ |
| 398 | avio_wl16(pb, 1); /* depth */ |
| 399 | put_swf_end_tag(s); |
| 400 | |
| 401 | /* free the bitmap */ |
| 402 | put_swf_tag(s, TAG_FREECHARACTER); |
| 403 | avio_wl16(pb, BITMAP_ID); |
| 404 | put_swf_end_tag(s); |
| 405 | } |
| 406 | |
| 407 | put_swf_tag(s, TAG_JPEG2 | TAG_LONG); |
| 408 | |
| 409 | avio_wl16(pb, BITMAP_ID); /* ID of the image */ |
| 410 | |
| 411 | /* a dummy jpeg header seems to be required */ |
| 412 | avio_wb32(pb, 0xffd8ffd9); |
| 413 | /* write the jpeg image */ |
| 414 | avio_write(pb, buf, size); |
| 415 | |
| 416 | put_swf_end_tag(s); |
| 417 | |
| 418 | /* draw the shape */ |
| 419 | |
| 420 | put_swf_tag(s, TAG_PLACEOBJECT); |
| 421 | avio_wl16(pb, SHAPE_ID); /* shape ID */ |
| 422 | avio_wl16(pb, 1); /* depth */ |
| 423 | put_swf_matrix(pb, 20 << FRAC_BITS, 0, 0, 20 << FRAC_BITS, 0, 0); |
| 424 | put_swf_end_tag(s); |
| 425 | } |
| 426 | |
| 427 | swf->swf_frame_number++; |
| 428 | |
| 429 | /* streaming sound always should be placed just before showframe tags */ |
| 430 | if (swf->audio_enc && av_fifo_size(swf->audio_fifo)) { |
| 431 | int frame_size = av_fifo_size(swf->audio_fifo); |
| 432 | put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG); |
| 433 | avio_wl16(pb, swf->sound_samples); |
| 434 | avio_wl16(pb, 0); // seek samples |
| 435 | av_fifo_generic_read(swf->audio_fifo, pb, frame_size, (void*)avio_write); |
| 436 | put_swf_end_tag(s); |
| 437 | |
| 438 | /* update FIFO */ |
| 439 | swf->sound_samples = 0; |
| 440 | } |
| 441 | |
| 442 | /* output the frame */ |
| 443 | put_swf_tag(s, TAG_SHOWFRAME); |
| 444 | put_swf_end_tag(s); |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int swf_write_audio(AVFormatContext *s, |
| 450 | AVCodecContext *enc, uint8_t *buf, int size) |
| 451 | { |
| 452 | SWFContext *swf = s->priv_data; |
| 453 | |
| 454 | /* Flash Player limit */ |
| 455 | if (swf->swf_frame_number == 16000) |
| 456 | av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n"); |
| 457 | |
| 458 | if (av_fifo_size(swf->audio_fifo) + size > AUDIO_FIFO_SIZE) { |
| 459 | av_log(s, AV_LOG_ERROR, "audio fifo too small to mux audio essence\n"); |
| 460 | return -1; |
| 461 | } |
| 462 | |
| 463 | av_fifo_generic_write(swf->audio_fifo, buf, size, NULL); |
| 464 | swf->sound_samples += enc->frame_size; |
| 465 | |
| 466 | /* if audio only stream make sure we add swf frames */ |
| 467 | if (!swf->video_enc) |
| 468 | swf_write_video(s, enc, 0, 0); |
| 469 | |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | static int swf_write_packet(AVFormatContext *s, AVPacket *pkt) |
| 474 | { |
| 475 | AVCodecContext *codec = s->streams[pkt->stream_index]->codec; |
| 476 | if (codec->codec_type == AVMEDIA_TYPE_AUDIO) |
| 477 | return swf_write_audio(s, codec, pkt->data, pkt->size); |
| 478 | else |
| 479 | return swf_write_video(s, codec, pkt->data, pkt->size); |
| 480 | } |
| 481 | |
| 482 | static int swf_write_trailer(AVFormatContext *s) |
| 483 | { |
| 484 | SWFContext *swf = s->priv_data; |
| 485 | AVIOContext *pb = s->pb; |
| 486 | AVCodecContext *enc, *video_enc; |
| 487 | int file_size, i; |
| 488 | |
| 489 | video_enc = NULL; |
| 490 | for(i=0;i<s->nb_streams;i++) { |
| 491 | enc = s->streams[i]->codec; |
| 492 | if (enc->codec_type == AVMEDIA_TYPE_VIDEO) |
| 493 | video_enc = enc; |
| 494 | else { |
| 495 | av_fifo_freep(&swf->audio_fifo); |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | put_swf_tag(s, TAG_END); |
| 500 | put_swf_end_tag(s); |
| 501 | |
| 502 | /* patch file size and number of frames if not streamed */ |
| 503 | if (s->pb->seekable && video_enc) { |
| 504 | file_size = avio_tell(pb); |
| 505 | avio_seek(pb, 4, SEEK_SET); |
| 506 | avio_wl32(pb, file_size); |
| 507 | avio_seek(pb, swf->duration_pos, SEEK_SET); |
| 508 | avio_wl16(pb, swf->video_frame_number); |
| 509 | if (swf->vframes_pos) { |
| 510 | avio_seek(pb, swf->vframes_pos, SEEK_SET); |
| 511 | avio_wl16(pb, swf->video_frame_number); |
| 512 | } |
| 513 | avio_seek(pb, file_size, SEEK_SET); |
| 514 | } |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | #if CONFIG_SWF_MUXER |
| 519 | AVOutputFormat ff_swf_muxer = { |
| 520 | .name = "swf", |
| 521 | .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"), |
| 522 | .mime_type = "application/x-shockwave-flash", |
| 523 | .extensions = "swf", |
| 524 | .priv_data_size = sizeof(SWFContext), |
| 525 | .audio_codec = AV_CODEC_ID_MP3, |
| 526 | .video_codec = AV_CODEC_ID_FLV1, |
| 527 | .write_header = swf_write_header, |
| 528 | .write_packet = swf_write_packet, |
| 529 | .write_trailer = swf_write_trailer, |
| 530 | .flags = AVFMT_TS_NONSTRICT, |
| 531 | }; |
| 532 | #endif |
| 533 | #if CONFIG_AVM2_MUXER |
| 534 | AVOutputFormat ff_avm2_muxer = { |
| 535 | .name = "avm2", |
| 536 | .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash) (AVM2)"), |
| 537 | .mime_type = "application/x-shockwave-flash", |
| 538 | .priv_data_size = sizeof(SWFContext), |
| 539 | .audio_codec = AV_CODEC_ID_MP3, |
| 540 | .video_codec = AV_CODEC_ID_FLV1, |
| 541 | .write_header = swf_write_header, |
| 542 | .write_packet = swf_write_packet, |
| 543 | .write_trailer = swf_write_trailer, |
| 544 | .flags = AVFMT_TS_NONSTRICT, |
| 545 | }; |
| 546 | #endif |