| 1 | /* |
| 2 | * GXF muxer. |
| 3 | * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "libavutil/avassert.h" |
| 23 | #include "libavutil/intfloat.h" |
| 24 | #include "libavutil/opt.h" |
| 25 | #include "libavutil/mathematics.h" |
| 26 | #include "libavutil/timecode.h" |
| 27 | #include "avformat.h" |
| 28 | #include "internal.h" |
| 29 | #include "gxf.h" |
| 30 | #include "audiointerleave.h" |
| 31 | |
| 32 | #define GXF_AUDIO_PACKET_SIZE 65536 |
| 33 | |
| 34 | #define GXF_TIMECODE(c, d, h, m, s, f) \ |
| 35 | ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f)) |
| 36 | |
| 37 | typedef struct GXFTimecode{ |
| 38 | int hh; |
| 39 | int mm; |
| 40 | int ss; |
| 41 | int ff; |
| 42 | int color; |
| 43 | int drop; |
| 44 | } GXFTimecode; |
| 45 | |
| 46 | typedef struct GXFStreamContext { |
| 47 | AudioInterleaveContext aic; |
| 48 | uint32_t track_type; |
| 49 | uint32_t sample_size; |
| 50 | uint32_t sample_rate; |
| 51 | uint16_t media_type; |
| 52 | uint16_t media_info; |
| 53 | int frame_rate_index; |
| 54 | int lines_index; |
| 55 | int fields; |
| 56 | int iframes; |
| 57 | int pframes; |
| 58 | int bframes; |
| 59 | int p_per_gop; |
| 60 | int b_per_i_or_p; ///< number of B frames per I frame or P frame |
| 61 | int first_gop_closed; |
| 62 | unsigned order; ///< interleaving order |
| 63 | } GXFStreamContext; |
| 64 | |
| 65 | typedef struct GXFContext { |
| 66 | AVClass *av_class; |
| 67 | uint32_t nb_fields; |
| 68 | uint16_t audio_tracks; |
| 69 | uint16_t mpeg_tracks; |
| 70 | int64_t creation_time; |
| 71 | uint32_t umf_start_offset; |
| 72 | uint32_t umf_track_offset; |
| 73 | uint32_t umf_media_offset; |
| 74 | uint32_t umf_length; |
| 75 | uint16_t umf_track_size; |
| 76 | uint16_t umf_media_size; |
| 77 | AVRational time_base; |
| 78 | int flags; |
| 79 | GXFStreamContext timecode_track; |
| 80 | unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field |
| 81 | unsigned flt_entries_nb; |
| 82 | uint64_t *map_offsets; ///< offset of map packets |
| 83 | unsigned map_offsets_nb; |
| 84 | unsigned packet_count; |
| 85 | GXFTimecode tc; |
| 86 | } GXFContext; |
| 87 | |
| 88 | static const struct { |
| 89 | int height, index; |
| 90 | } gxf_lines_tab[] = { |
| 91 | { 480, 1 }, /* NTSC */ |
| 92 | { 512, 1 }, /* NTSC + VBI */ |
| 93 | { 576, 2 }, /* PAL */ |
| 94 | { 608, 2 }, /* PAL + VBI */ |
| 95 | { 1080, 4 }, |
| 96 | { 720, 6 }, |
| 97 | }; |
| 98 | |
| 99 | static const AVCodecTag gxf_media_types[] = { |
| 100 | { AV_CODEC_ID_MJPEG , 3 }, /* NTSC */ |
| 101 | { AV_CODEC_ID_MJPEG , 4 }, /* PAL */ |
| 102 | { AV_CODEC_ID_PCM_S24LE , 9 }, |
| 103 | { AV_CODEC_ID_PCM_S16LE , 10 }, |
| 104 | { AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */ |
| 105 | { AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */ |
| 106 | { AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */ |
| 107 | { AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */ |
| 108 | { AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */ |
| 109 | { AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */ |
| 110 | { AV_CODEC_ID_AC3 , 17 }, |
| 111 | //{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */ |
| 112 | { AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */ |
| 113 | { AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */ |
| 114 | { AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */ |
| 115 | { AV_CODEC_ID_NONE, 0 }, |
| 116 | }; |
| 117 | |
| 118 | #define SERVER_PATH "EXT:/PDR/default/" |
| 119 | #define ES_NAME_PATTERN "EXT:/PDR/default/ES." |
| 120 | |
| 121 | static int gxf_find_lines_index(AVStream *st) |
| 122 | { |
| 123 | GXFStreamContext *sc = st->priv_data; |
| 124 | int i; |
| 125 | |
| 126 | for (i = 0; i < 6; ++i) { |
| 127 | if (st->codec->height == gxf_lines_tab[i].height) { |
| 128 | sc->lines_index = gxf_lines_tab[i].index; |
| 129 | return 0; |
| 130 | } |
| 131 | } |
| 132 | return -1; |
| 133 | } |
| 134 | |
| 135 | static void gxf_write_padding(AVIOContext *pb, int64_t to_pad) |
| 136 | { |
| 137 | for (; to_pad > 0; to_pad--) { |
| 138 | avio_w8(pb, 0); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | static int64_t updatePacketSize(AVIOContext *pb, int64_t pos) |
| 143 | { |
| 144 | int64_t curpos; |
| 145 | int size; |
| 146 | |
| 147 | size = avio_tell(pb) - pos; |
| 148 | if (size % 4) { |
| 149 | gxf_write_padding(pb, 4 - size % 4); |
| 150 | size = avio_tell(pb) - pos; |
| 151 | } |
| 152 | curpos = avio_tell(pb); |
| 153 | avio_seek(pb, pos + 6, SEEK_SET); |
| 154 | avio_wb32(pb, size); |
| 155 | avio_seek(pb, curpos, SEEK_SET); |
| 156 | return curpos - pos; |
| 157 | } |
| 158 | |
| 159 | static int64_t updateSize(AVIOContext *pb, int64_t pos) |
| 160 | { |
| 161 | int64_t curpos; |
| 162 | |
| 163 | curpos = avio_tell(pb); |
| 164 | avio_seek(pb, pos, SEEK_SET); |
| 165 | avio_wb16(pb, curpos - pos - 2); |
| 166 | avio_seek(pb, curpos, SEEK_SET); |
| 167 | return curpos - pos; |
| 168 | } |
| 169 | |
| 170 | static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type) |
| 171 | { |
| 172 | avio_wb32(pb, 0); /* packet leader for synchro */ |
| 173 | avio_w8(pb, 1); |
| 174 | avio_w8(pb, type); /* map packet */ |
| 175 | avio_wb32(pb, 0); /* size */ |
| 176 | avio_wb32(pb, 0); /* reserved */ |
| 177 | avio_w8(pb, 0xE1); /* trailer 1 */ |
| 178 | avio_w8(pb, 0xE2); /* trailer 2 */ |
| 179 | } |
| 180 | |
| 181 | static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st) |
| 182 | { |
| 183 | GXFStreamContext *sc = st->priv_data; |
| 184 | char buffer[1024]; |
| 185 | int size, starting_line; |
| 186 | |
| 187 | if (sc->iframes) { |
| 188 | sc->p_per_gop = sc->pframes / sc->iframes; |
| 189 | if (sc->pframes % sc->iframes) |
| 190 | sc->p_per_gop++; |
| 191 | if (sc->pframes) { |
| 192 | sc->b_per_i_or_p = sc->bframes / sc->pframes; |
| 193 | if (sc->bframes % sc->pframes) |
| 194 | sc->b_per_i_or_p++; |
| 195 | } |
| 196 | if (sc->p_per_gop > 9) |
| 197 | sc->p_per_gop = 9; /* ensure value won't take more than one char */ |
| 198 | if (sc->b_per_i_or_p > 9) |
| 199 | sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */ |
| 200 | } |
| 201 | if (st->codec->height == 512 || st->codec->height == 608) |
| 202 | starting_line = 7; // VBI |
| 203 | else if (st->codec->height == 480) |
| 204 | starting_line = 20; |
| 205 | else |
| 206 | starting_line = 23; // default PAL |
| 207 | |
| 208 | size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n" |
| 209 | "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n", |
| 210 | (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p, |
| 211 | st->codec->pix_fmt == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1, |
| 212 | starting_line, (st->codec->height + 15) / 16); |
| 213 | av_assert0(size < sizeof(buffer)); |
| 214 | avio_w8(pb, TRACK_MPG_AUX); |
| 215 | avio_w8(pb, size + 1); |
| 216 | avio_write(pb, (uint8_t *)buffer, size + 1); |
| 217 | return size + 3; |
| 218 | } |
| 219 | |
| 220 | static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st) |
| 221 | { |
| 222 | int64_t track_aux_data = 0; |
| 223 | |
| 224 | avio_w8(pb, TRACK_AUX); |
| 225 | avio_w8(pb, 8); |
| 226 | if (st->codec->pix_fmt == AV_PIX_FMT_YUV420P) |
| 227 | track_aux_data |= 0x01; /* marks stream as DVCAM instead of DVPRO */ |
| 228 | track_aux_data |= 0x40000000; /* aux data is valid */ |
| 229 | avio_wl64(pb, track_aux_data); |
| 230 | return 8; |
| 231 | } |
| 232 | |
| 233 | static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf) |
| 234 | { |
| 235 | uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop, |
| 236 | gxf->tc.hh, gxf->tc.mm, |
| 237 | gxf->tc.ss, gxf->tc.ff); |
| 238 | |
| 239 | avio_w8(pb, TRACK_AUX); |
| 240 | avio_w8(pb, 8); |
| 241 | avio_wl32(pb, timecode); |
| 242 | /* reserved */ |
| 243 | avio_wl32(pb, 0); |
| 244 | return 8; |
| 245 | } |
| 246 | |
| 247 | static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index) |
| 248 | { |
| 249 | GXFContext *gxf = s->priv_data; |
| 250 | AVIOContext *pb = s->pb; |
| 251 | int64_t pos; |
| 252 | |
| 253 | /* track description section */ |
| 254 | avio_w8(pb, sc->media_type + 0x80); |
| 255 | avio_w8(pb, index + 0xC0); |
| 256 | |
| 257 | pos = avio_tell(pb); |
| 258 | avio_wb16(pb, 0); /* size */ |
| 259 | |
| 260 | /* media file name */ |
| 261 | avio_w8(pb, TRACK_NAME); |
| 262 | avio_w8(pb, strlen(ES_NAME_PATTERN) + 3); |
| 263 | avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1); |
| 264 | avio_wb16(pb, sc->media_info); |
| 265 | avio_w8(pb, 0); |
| 266 | |
| 267 | switch (sc->track_type) { |
| 268 | case 3: /* timecode */ |
| 269 | gxf_write_timecode_auxiliary(pb, gxf); |
| 270 | break; |
| 271 | case 4: /* MPEG2 */ |
| 272 | case 9: /* MPEG1 */ |
| 273 | gxf_write_mpeg_auxiliary(pb, s->streams[index]); |
| 274 | break; |
| 275 | case 5: /* DV25 */ |
| 276 | case 6: /* DV50 */ |
| 277 | gxf_write_dv_auxiliary(pb, s->streams[index]); |
| 278 | break; |
| 279 | default: |
| 280 | avio_w8(pb, TRACK_AUX); |
| 281 | avio_w8(pb, 8); |
| 282 | avio_wl64(pb, 0); |
| 283 | } |
| 284 | |
| 285 | /* file system version */ |
| 286 | avio_w8(pb, TRACK_VER); |
| 287 | avio_w8(pb, 4); |
| 288 | avio_wb32(pb, 0); |
| 289 | |
| 290 | /* frame rate */ |
| 291 | avio_w8(pb, TRACK_FPS); |
| 292 | avio_w8(pb, 4); |
| 293 | avio_wb32(pb, sc->frame_rate_index); |
| 294 | |
| 295 | /* lines per frame */ |
| 296 | avio_w8(pb, TRACK_LINES); |
| 297 | avio_w8(pb, 4); |
| 298 | avio_wb32(pb, sc->lines_index); |
| 299 | |
| 300 | /* fields per frame */ |
| 301 | avio_w8(pb, TRACK_FPF); |
| 302 | avio_w8(pb, 4); |
| 303 | avio_wb32(pb, sc->fields); |
| 304 | |
| 305 | return updateSize(pb, pos); |
| 306 | } |
| 307 | |
| 308 | static int gxf_write_material_data_section(AVFormatContext *s) |
| 309 | { |
| 310 | GXFContext *gxf = s->priv_data; |
| 311 | AVIOContext *pb = s->pb; |
| 312 | int64_t pos; |
| 313 | int len; |
| 314 | const char *filename = strrchr(s->filename, '/'); |
| 315 | |
| 316 | pos = avio_tell(pb); |
| 317 | avio_wb16(pb, 0); /* size */ |
| 318 | |
| 319 | /* name */ |
| 320 | if (filename) |
| 321 | filename++; |
| 322 | else |
| 323 | filename = s->filename; |
| 324 | len = strlen(filename); |
| 325 | |
| 326 | avio_w8(pb, MAT_NAME); |
| 327 | avio_w8(pb, strlen(SERVER_PATH) + len + 1); |
| 328 | avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1); |
| 329 | avio_write(pb, filename, len); |
| 330 | avio_w8(pb, 0); |
| 331 | |
| 332 | /* first field */ |
| 333 | avio_w8(pb, MAT_FIRST_FIELD); |
| 334 | avio_w8(pb, 4); |
| 335 | avio_wb32(pb, 0); |
| 336 | |
| 337 | /* last field */ |
| 338 | avio_w8(pb, MAT_LAST_FIELD); |
| 339 | avio_w8(pb, 4); |
| 340 | avio_wb32(pb, gxf->nb_fields); |
| 341 | |
| 342 | /* reserved */ |
| 343 | avio_w8(pb, MAT_MARK_IN); |
| 344 | avio_w8(pb, 4); |
| 345 | avio_wb32(pb, 0); |
| 346 | |
| 347 | avio_w8(pb, MAT_MARK_OUT); |
| 348 | avio_w8(pb, 4); |
| 349 | avio_wb32(pb, gxf->nb_fields); |
| 350 | |
| 351 | /* estimated size */ |
| 352 | avio_w8(pb, MAT_SIZE); |
| 353 | avio_w8(pb, 4); |
| 354 | avio_wb32(pb, avio_size(pb) / 1024); |
| 355 | |
| 356 | return updateSize(pb, pos); |
| 357 | } |
| 358 | |
| 359 | static int gxf_write_track_description_section(AVFormatContext *s) |
| 360 | { |
| 361 | GXFContext *gxf = s->priv_data; |
| 362 | AVIOContext *pb = s->pb; |
| 363 | int64_t pos; |
| 364 | int i; |
| 365 | |
| 366 | pos = avio_tell(pb); |
| 367 | avio_wb16(pb, 0); /* size */ |
| 368 | for (i = 0; i < s->nb_streams; ++i) |
| 369 | gxf_write_track_description(s, s->streams[i]->priv_data, i); |
| 370 | |
| 371 | gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams); |
| 372 | |
| 373 | return updateSize(pb, pos); |
| 374 | } |
| 375 | |
| 376 | static int gxf_write_map_packet(AVFormatContext *s, int rewrite) |
| 377 | { |
| 378 | GXFContext *gxf = s->priv_data; |
| 379 | AVIOContext *pb = s->pb; |
| 380 | int64_t pos = avio_tell(pb); |
| 381 | |
| 382 | if (!rewrite) { |
| 383 | if (!(gxf->map_offsets_nb % 30)) { |
| 384 | int err; |
| 385 | if ((err = av_reallocp_array(&gxf->map_offsets, |
| 386 | gxf->map_offsets_nb + 30, |
| 387 | sizeof(*gxf->map_offsets))) < 0) { |
| 388 | gxf->map_offsets_nb = 0; |
| 389 | av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n"); |
| 390 | return err; |
| 391 | } |
| 392 | } |
| 393 | gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here |
| 394 | } |
| 395 | |
| 396 | gxf_write_packet_header(pb, PKT_MAP); |
| 397 | |
| 398 | /* preamble */ |
| 399 | avio_w8(pb, 0xE0); /* version */ |
| 400 | avio_w8(pb, 0xFF); /* reserved */ |
| 401 | |
| 402 | gxf_write_material_data_section(s); |
| 403 | gxf_write_track_description_section(s); |
| 404 | |
| 405 | return updatePacketSize(pb, pos); |
| 406 | } |
| 407 | |
| 408 | static int gxf_write_flt_packet(AVFormatContext *s) |
| 409 | { |
| 410 | GXFContext *gxf = s->priv_data; |
| 411 | AVIOContext *pb = s->pb; |
| 412 | int64_t pos = avio_tell(pb); |
| 413 | int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1; |
| 414 | int flt_entries = gxf->nb_fields / fields_per_flt; |
| 415 | int i = 0; |
| 416 | |
| 417 | gxf_write_packet_header(pb, PKT_FLT); |
| 418 | |
| 419 | avio_wl32(pb, fields_per_flt); /* number of fields */ |
| 420 | avio_wl32(pb, flt_entries); /* number of active flt entries */ |
| 421 | |
| 422 | if (gxf->flt_entries) { |
| 423 | for (i = 0; i < flt_entries; i++) |
| 424 | avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]); |
| 425 | } |
| 426 | |
| 427 | for (; i < 1000; i++) |
| 428 | avio_wl32(pb, 0); |
| 429 | |
| 430 | return updatePacketSize(pb, pos); |
| 431 | } |
| 432 | |
| 433 | static int gxf_write_umf_material_description(AVFormatContext *s) |
| 434 | { |
| 435 | GXFContext *gxf = s->priv_data; |
| 436 | AVIOContext *pb = s->pb; |
| 437 | int timecode_base = gxf->time_base.den == 60000 ? 60 : 50; |
| 438 | int64_t timestamp = 0; |
| 439 | AVDictionaryEntry *t; |
| 440 | uint64_t nb_fields; |
| 441 | uint32_t timecode_in; // timecode at mark in |
| 442 | uint32_t timecode_out; // timecode at mark out |
| 443 | |
| 444 | if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) |
| 445 | timestamp = ff_iso8601_to_unix_time(t->value); |
| 446 | |
| 447 | timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop, |
| 448 | gxf->tc.hh, gxf->tc.mm, |
| 449 | gxf->tc.ss, gxf->tc.ff); |
| 450 | |
| 451 | nb_fields = gxf->nb_fields + |
| 452 | gxf->tc.hh * (timecode_base * 3600) + |
| 453 | gxf->tc.mm * (timecode_base * 60) + |
| 454 | gxf->tc.ss * timecode_base + |
| 455 | gxf->tc.ff; |
| 456 | |
| 457 | timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop, |
| 458 | nb_fields / (timecode_base * 3600) % 24, |
| 459 | nb_fields / (timecode_base * 60) % 60, |
| 460 | nb_fields / timecode_base % 60, |
| 461 | nb_fields % timecode_base); |
| 462 | |
| 463 | avio_wl32(pb, gxf->flags); |
| 464 | avio_wl32(pb, gxf->nb_fields); /* length of the longest track */ |
| 465 | avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */ |
| 466 | avio_wl32(pb, 0); /* mark in */ |
| 467 | avio_wl32(pb, gxf->nb_fields); /* mark out */ |
| 468 | avio_wl32(pb, timecode_in); /* timecode mark in */ |
| 469 | avio_wl32(pb, timecode_out); /* timecode mark out */ |
| 470 | avio_wl64(pb, timestamp); /* modification time */ |
| 471 | avio_wl64(pb, timestamp); /* creation time */ |
| 472 | avio_wl16(pb, 0); /* reserved */ |
| 473 | avio_wl16(pb, 0); /* reserved */ |
| 474 | avio_wl16(pb, gxf->audio_tracks); |
| 475 | avio_wl16(pb, 1); /* timecode track count */ |
| 476 | avio_wl16(pb, 0); /* reserved */ |
| 477 | avio_wl16(pb, gxf->mpeg_tracks); |
| 478 | return 48; |
| 479 | } |
| 480 | |
| 481 | static int gxf_write_umf_payload(AVFormatContext *s) |
| 482 | { |
| 483 | GXFContext *gxf = s->priv_data; |
| 484 | AVIOContext *pb = s->pb; |
| 485 | |
| 486 | avio_wl32(pb, gxf->umf_length); /* total length of the umf data */ |
| 487 | avio_wl32(pb, 3); /* version */ |
| 488 | avio_wl32(pb, s->nb_streams+1); |
| 489 | avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */ |
| 490 | avio_wl32(pb, gxf->umf_track_size); |
| 491 | avio_wl32(pb, s->nb_streams+1); |
| 492 | avio_wl32(pb, gxf->umf_media_offset); |
| 493 | avio_wl32(pb, gxf->umf_media_size); |
| 494 | avio_wl32(pb, gxf->umf_length); /* user data offset */ |
| 495 | avio_wl32(pb, 0); /* user data size */ |
| 496 | avio_wl32(pb, 0); /* reserved */ |
| 497 | avio_wl32(pb, 0); /* reserved */ |
| 498 | return 48; |
| 499 | } |
| 500 | |
| 501 | static int gxf_write_umf_track_description(AVFormatContext *s) |
| 502 | { |
| 503 | AVIOContext *pb = s->pb; |
| 504 | GXFContext *gxf = s->priv_data; |
| 505 | int64_t pos = avio_tell(pb); |
| 506 | int i; |
| 507 | |
| 508 | gxf->umf_track_offset = pos - gxf->umf_start_offset; |
| 509 | for (i = 0; i < s->nb_streams; ++i) { |
| 510 | GXFStreamContext *sc = s->streams[i]->priv_data; |
| 511 | avio_wl16(pb, sc->media_info); |
| 512 | avio_wl16(pb, 1); |
| 513 | } |
| 514 | |
| 515 | avio_wl16(pb, gxf->timecode_track.media_info); |
| 516 | avio_wl16(pb, 1); |
| 517 | |
| 518 | return avio_tell(pb) - pos; |
| 519 | } |
| 520 | |
| 521 | static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st) |
| 522 | { |
| 523 | GXFStreamContext *sc = st->priv_data; |
| 524 | |
| 525 | if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P) |
| 526 | avio_wl32(pb, 2); |
| 527 | else |
| 528 | avio_wl32(pb, 1); /* default to 420 */ |
| 529 | avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */ |
| 530 | avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */ |
| 531 | avio_wl32(pb, 1); /* I picture per GOP */ |
| 532 | avio_wl32(pb, sc->p_per_gop); |
| 533 | avio_wl32(pb, sc->b_per_i_or_p); |
| 534 | if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) |
| 535 | avio_wl32(pb, 2); |
| 536 | else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO) |
| 537 | avio_wl32(pb, 1); |
| 538 | else |
| 539 | avio_wl32(pb, 0); |
| 540 | avio_wl32(pb, 0); /* reserved */ |
| 541 | return 32; |
| 542 | } |
| 543 | |
| 544 | static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop) |
| 545 | { |
| 546 | avio_wl32(pb, drop); /* drop frame */ |
| 547 | avio_wl32(pb, 0); /* reserved */ |
| 548 | avio_wl32(pb, 0); /* reserved */ |
| 549 | avio_wl32(pb, 0); /* reserved */ |
| 550 | avio_wl32(pb, 0); /* reserved */ |
| 551 | avio_wl32(pb, 0); /* reserved */ |
| 552 | avio_wl32(pb, 0); /* reserved */ |
| 553 | avio_wl32(pb, 0); /* reserved */ |
| 554 | return 32; |
| 555 | } |
| 556 | |
| 557 | static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st) |
| 558 | { |
| 559 | int dv_umf_data = 0; |
| 560 | |
| 561 | if (st->codec->pix_fmt == AV_PIX_FMT_YUV420P) |
| 562 | dv_umf_data |= 0x20; /* marks as DVCAM instead of DVPRO */ |
| 563 | avio_wl32(pb, dv_umf_data); |
| 564 | avio_wl32(pb, 0); |
| 565 | avio_wl32(pb, 0); |
| 566 | avio_wl32(pb, 0); |
| 567 | avio_wl32(pb, 0); |
| 568 | avio_wl32(pb, 0); |
| 569 | avio_wl32(pb, 0); |
| 570 | avio_wl32(pb, 0); |
| 571 | return 32; |
| 572 | } |
| 573 | |
| 574 | static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc) |
| 575 | { |
| 576 | avio_wl64(pb, av_double2int(1)); /* sound level to begin to */ |
| 577 | avio_wl64(pb, av_double2int(1)); /* sound level to begin to */ |
| 578 | avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */ |
| 579 | avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */ |
| 580 | avio_wl32(pb, 0); /* reserved */ |
| 581 | avio_wl32(pb, 0); /* reserved */ |
| 582 | return 32; |
| 583 | } |
| 584 | |
| 585 | static int gxf_write_umf_media_description(AVFormatContext *s) |
| 586 | { |
| 587 | GXFContext *gxf = s->priv_data; |
| 588 | AVIOContext *pb = s->pb; |
| 589 | int64_t pos; |
| 590 | int i, j; |
| 591 | |
| 592 | pos = avio_tell(pb); |
| 593 | gxf->umf_media_offset = pos - gxf->umf_start_offset; |
| 594 | for (i = 0; i <= s->nb_streams; ++i) { |
| 595 | GXFStreamContext *sc; |
| 596 | int64_t startpos, curpos; |
| 597 | |
| 598 | if (i == s->nb_streams) |
| 599 | sc = &gxf->timecode_track; |
| 600 | else |
| 601 | sc = s->streams[i]->priv_data; |
| 602 | |
| 603 | startpos = avio_tell(pb); |
| 604 | avio_wl16(pb, 0); /* length */ |
| 605 | avio_wl16(pb, sc->media_info); |
| 606 | avio_wl16(pb, 0); /* reserved */ |
| 607 | avio_wl16(pb, 0); /* reserved */ |
| 608 | avio_wl32(pb, gxf->nb_fields); |
| 609 | avio_wl32(pb, 0); /* attributes rw, ro */ |
| 610 | avio_wl32(pb, 0); /* mark in */ |
| 611 | avio_wl32(pb, gxf->nb_fields); /* mark out */ |
| 612 | avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN)); |
| 613 | avio_wb16(pb, sc->media_info); |
| 614 | for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++) |
| 615 | avio_w8(pb, 0); |
| 616 | avio_wl32(pb, sc->track_type); |
| 617 | avio_wl32(pb, sc->sample_rate); |
| 618 | avio_wl32(pb, sc->sample_size); |
| 619 | avio_wl32(pb, 0); /* reserved */ |
| 620 | |
| 621 | if (sc == &gxf->timecode_track) |
| 622 | gxf_write_umf_media_timecode(pb, gxf->tc.drop); |
| 623 | else { |
| 624 | AVStream *st = s->streams[i]; |
| 625 | switch (st->codec->codec_id) { |
| 626 | case AV_CODEC_ID_MPEG1VIDEO: |
| 627 | case AV_CODEC_ID_MPEG2VIDEO: |
| 628 | gxf_write_umf_media_mpeg(pb, st); |
| 629 | break; |
| 630 | case AV_CODEC_ID_PCM_S16LE: |
| 631 | gxf_write_umf_media_audio(pb, sc); |
| 632 | break; |
| 633 | case AV_CODEC_ID_DVVIDEO: |
| 634 | gxf_write_umf_media_dv(pb, sc, st); |
| 635 | break; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | curpos = avio_tell(pb); |
| 640 | avio_seek(pb, startpos, SEEK_SET); |
| 641 | avio_wl16(pb, curpos - startpos); |
| 642 | avio_seek(pb, curpos, SEEK_SET); |
| 643 | } |
| 644 | return avio_tell(pb) - pos; |
| 645 | } |
| 646 | |
| 647 | static int gxf_write_umf_packet(AVFormatContext *s) |
| 648 | { |
| 649 | GXFContext *gxf = s->priv_data; |
| 650 | AVIOContext *pb = s->pb; |
| 651 | int64_t pos = avio_tell(pb); |
| 652 | |
| 653 | gxf_write_packet_header(pb, PKT_UMF); |
| 654 | |
| 655 | /* preamble */ |
| 656 | avio_w8(pb, 3); /* first and last (only) packet */ |
| 657 | avio_wb32(pb, gxf->umf_length); /* data length */ |
| 658 | |
| 659 | gxf->umf_start_offset = avio_tell(pb); |
| 660 | gxf_write_umf_payload(s); |
| 661 | gxf_write_umf_material_description(s); |
| 662 | gxf->umf_track_size = gxf_write_umf_track_description(s); |
| 663 | gxf->umf_media_size = gxf_write_umf_media_description(s); |
| 664 | gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset; |
| 665 | return updatePacketSize(pb, pos); |
| 666 | } |
| 667 | |
| 668 | static const int GXF_samples_per_frame[] = { 32768, 0 }; |
| 669 | |
| 670 | static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc) |
| 671 | { |
| 672 | if (!vsc) |
| 673 | return; |
| 674 | |
| 675 | sc->media_type = vsc->sample_rate == 60 ? 7 : 8; |
| 676 | sc->sample_rate = vsc->sample_rate; |
| 677 | sc->media_info = ('T'<<8) | '0'; |
| 678 | sc->track_type = 3; |
| 679 | sc->frame_rate_index = vsc->frame_rate_index; |
| 680 | sc->lines_index = vsc->lines_index; |
| 681 | sc->sample_size = 16; |
| 682 | sc->fields = vsc->fields; |
| 683 | } |
| 684 | |
| 685 | static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields) |
| 686 | { |
| 687 | char c; |
| 688 | |
| 689 | if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) { |
| 690 | av_log(s, AV_LOG_ERROR, "unable to parse timecode, " |
| 691 | "syntax: hh:mm:ss[:;.]ff\n"); |
| 692 | return -1; |
| 693 | } |
| 694 | |
| 695 | tc->color = 0; |
| 696 | tc->drop = c != ':'; |
| 697 | |
| 698 | if (fields == 2) |
| 699 | tc->ff = tc->ff * 2; |
| 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | static int gxf_write_header(AVFormatContext *s) |
| 705 | { |
| 706 | AVIOContext *pb = s->pb; |
| 707 | GXFContext *gxf = s->priv_data; |
| 708 | GXFStreamContext *vsc = NULL; |
| 709 | uint8_t tracks[255] = {0}; |
| 710 | int i, media_info = 0; |
| 711 | int ret; |
| 712 | AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0); |
| 713 | |
| 714 | if (!pb->seekable) { |
| 715 | av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n"); |
| 716 | return -1; |
| 717 | } |
| 718 | |
| 719 | gxf->flags |= 0x00080000; /* material is simple clip */ |
| 720 | for (i = 0; i < s->nb_streams; ++i) { |
| 721 | AVStream *st = s->streams[i]; |
| 722 | GXFStreamContext *sc = av_mallocz(sizeof(*sc)); |
| 723 | if (!sc) |
| 724 | return AVERROR(ENOMEM); |
| 725 | st->priv_data = sc; |
| 726 | |
| 727 | sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id); |
| 728 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 729 | if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE) { |
| 730 | av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n"); |
| 731 | return -1; |
| 732 | } |
| 733 | if (st->codec->sample_rate != 48000) { |
| 734 | av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n"); |
| 735 | return -1; |
| 736 | } |
| 737 | if (st->codec->channels != 1) { |
| 738 | av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n"); |
| 739 | return -1; |
| 740 | } |
| 741 | sc->track_type = 2; |
| 742 | sc->sample_rate = st->codec->sample_rate; |
| 743 | avpriv_set_pts_info(st, 64, 1, sc->sample_rate); |
| 744 | sc->sample_size = 16; |
| 745 | sc->frame_rate_index = -2; |
| 746 | sc->lines_index = -2; |
| 747 | sc->fields = -2; |
| 748 | gxf->audio_tracks++; |
| 749 | gxf->flags |= 0x04000000; /* audio is 16 bit pcm */ |
| 750 | media_info = 'A'; |
| 751 | } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 752 | if (i != 0) { |
| 753 | av_log(s, AV_LOG_ERROR, "video stream must be the first track\n"); |
| 754 | return -1; |
| 755 | } |
| 756 | /* FIXME check from time_base ? */ |
| 757 | if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */ |
| 758 | sc->frame_rate_index = 5; |
| 759 | sc->sample_rate = 60; |
| 760 | gxf->flags |= 0x00000080; |
| 761 | gxf->time_base = (AVRational){ 1001, 60000 }; |
| 762 | } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */ |
| 763 | sc->frame_rate_index = 6; |
| 764 | sc->media_type++; |
| 765 | sc->sample_rate = 50; |
| 766 | gxf->flags |= 0x00000040; |
| 767 | gxf->time_base = (AVRational){ 1, 50 }; |
| 768 | } else { |
| 769 | av_log(s, AV_LOG_ERROR, "unsupported video resolution, " |
| 770 | "gxf muxer only accepts PAL or NTSC resolutions currently\n"); |
| 771 | return -1; |
| 772 | } |
| 773 | if (!tcr) |
| 774 | tcr = av_dict_get(st->metadata, "timecode", NULL, 0); |
| 775 | avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den); |
| 776 | if (gxf_find_lines_index(st) < 0) |
| 777 | sc->lines_index = -1; |
| 778 | sc->sample_size = st->codec->bit_rate; |
| 779 | sc->fields = 2; /* interlaced */ |
| 780 | |
| 781 | vsc = sc; |
| 782 | |
| 783 | switch (st->codec->codec_id) { |
| 784 | case AV_CODEC_ID_MJPEG: |
| 785 | sc->track_type = 1; |
| 786 | gxf->flags |= 0x00004000; |
| 787 | media_info = 'J'; |
| 788 | break; |
| 789 | case AV_CODEC_ID_MPEG1VIDEO: |
| 790 | sc->track_type = 9; |
| 791 | gxf->mpeg_tracks++; |
| 792 | media_info = 'L'; |
| 793 | break; |
| 794 | case AV_CODEC_ID_MPEG2VIDEO: |
| 795 | sc->first_gop_closed = -1; |
| 796 | sc->track_type = 4; |
| 797 | gxf->mpeg_tracks++; |
| 798 | gxf->flags |= 0x00008000; |
| 799 | media_info = 'M'; |
| 800 | break; |
| 801 | case AV_CODEC_ID_DVVIDEO: |
| 802 | if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P) { |
| 803 | sc->media_type += 2; |
| 804 | sc->track_type = 6; |
| 805 | gxf->flags |= 0x00002000; |
| 806 | media_info = 'E'; |
| 807 | } else { |
| 808 | sc->track_type = 5; |
| 809 | gxf->flags |= 0x00001000; |
| 810 | media_info = 'D'; |
| 811 | } |
| 812 | break; |
| 813 | default: |
| 814 | av_log(s, AV_LOG_ERROR, "video codec not supported\n"); |
| 815 | return -1; |
| 816 | } |
| 817 | } |
| 818 | /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */ |
| 819 | sc->media_info = media_info<<8 | ('0'+tracks[media_info]++); |
| 820 | sc->order = s->nb_streams - st->index; |
| 821 | } |
| 822 | |
| 823 | if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0) |
| 824 | return -1; |
| 825 | |
| 826 | if (tcr && vsc) |
| 827 | gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields); |
| 828 | |
| 829 | gxf_init_timecode_track(&gxf->timecode_track, vsc); |
| 830 | gxf->flags |= 0x200000; // time code track is non-drop frame |
| 831 | |
| 832 | if ((ret = gxf_write_map_packet(s, 0)) < 0) |
| 833 | return ret; |
| 834 | gxf_write_flt_packet(s); |
| 835 | gxf_write_umf_packet(s); |
| 836 | |
| 837 | gxf->packet_count = 3; |
| 838 | |
| 839 | avio_flush(pb); |
| 840 | return 0; |
| 841 | } |
| 842 | |
| 843 | static int gxf_write_eos_packet(AVIOContext *pb) |
| 844 | { |
| 845 | int64_t pos = avio_tell(pb); |
| 846 | |
| 847 | gxf_write_packet_header(pb, PKT_EOS); |
| 848 | return updatePacketSize(pb, pos); |
| 849 | } |
| 850 | |
| 851 | static int gxf_write_trailer(AVFormatContext *s) |
| 852 | { |
| 853 | GXFContext *gxf = s->priv_data; |
| 854 | AVIOContext *pb = s->pb; |
| 855 | int64_t end; |
| 856 | int i; |
| 857 | int ret; |
| 858 | |
| 859 | ff_audio_interleave_close(s); |
| 860 | |
| 861 | gxf_write_eos_packet(pb); |
| 862 | end = avio_tell(pb); |
| 863 | avio_seek(pb, 0, SEEK_SET); |
| 864 | /* overwrite map, flt and umf packets with new values */ |
| 865 | if ((ret = gxf_write_map_packet(s, 1)) < 0) |
| 866 | return ret; |
| 867 | gxf_write_flt_packet(s); |
| 868 | gxf_write_umf_packet(s); |
| 869 | avio_flush(pb); |
| 870 | /* update duration in all map packets */ |
| 871 | for (i = 1; i < gxf->map_offsets_nb; i++) { |
| 872 | avio_seek(pb, gxf->map_offsets[i], SEEK_SET); |
| 873 | if ((ret = gxf_write_map_packet(s, 1)) < 0) |
| 874 | return ret; |
| 875 | avio_flush(pb); |
| 876 | } |
| 877 | |
| 878 | avio_seek(pb, end, SEEK_SET); |
| 879 | |
| 880 | av_freep(&gxf->flt_entries); |
| 881 | av_freep(&gxf->map_offsets); |
| 882 | |
| 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size) |
| 887 | { |
| 888 | uint32_t c=-1; |
| 889 | int i; |
| 890 | for(i=0; i<size-4 && c!=0x100; i++){ |
| 891 | c = (c<<8) + buf[i]; |
| 892 | if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */ |
| 893 | sc->first_gop_closed= (buf[i+4]>>6)&1; |
| 894 | } |
| 895 | return (buf[i+1]>>3)&7; |
| 896 | } |
| 897 | |
| 898 | static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size) |
| 899 | { |
| 900 | GXFContext *gxf = s->priv_data; |
| 901 | AVIOContext *pb = s->pb; |
| 902 | AVStream *st = s->streams[pkt->stream_index]; |
| 903 | GXFStreamContext *sc = st->priv_data; |
| 904 | unsigned field_nb; |
| 905 | /* If the video is frame-encoded, the frame numbers shall be represented by |
| 906 | * even field numbers. |
| 907 | * see SMPTE360M-2004 6.4.2.1.3 Media field number */ |
| 908 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 909 | field_nb = gxf->nb_fields; |
| 910 | } else { |
| 911 | field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den, |
| 912 | (int64_t)48000*gxf->time_base.num, AV_ROUND_UP); |
| 913 | } |
| 914 | |
| 915 | avio_w8(pb, sc->media_type); |
| 916 | avio_w8(pb, st->index); |
| 917 | avio_wb32(pb, field_nb); |
| 918 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 919 | avio_wb16(pb, 0); |
| 920 | avio_wb16(pb, size / 2); |
| 921 | } else if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) { |
| 922 | int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size); |
| 923 | if (frame_type == AV_PICTURE_TYPE_I) { |
| 924 | avio_w8(pb, 0x0d); |
| 925 | sc->iframes++; |
| 926 | } else if (frame_type == AV_PICTURE_TYPE_B) { |
| 927 | avio_w8(pb, 0x0f); |
| 928 | sc->bframes++; |
| 929 | } else { |
| 930 | avio_w8(pb, 0x0e); |
| 931 | sc->pframes++; |
| 932 | } |
| 933 | avio_wb24(pb, size); |
| 934 | } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) { |
| 935 | avio_w8(pb, size / 4096); |
| 936 | avio_wb24(pb, 0); |
| 937 | } else |
| 938 | avio_wb32(pb, size); |
| 939 | avio_wb32(pb, field_nb); |
| 940 | avio_w8(pb, 1); /* flags */ |
| 941 | avio_w8(pb, 0); /* reserved */ |
| 942 | return 16; |
| 943 | } |
| 944 | |
| 945 | static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) |
| 946 | { |
| 947 | GXFContext *gxf = s->priv_data; |
| 948 | AVIOContext *pb = s->pb; |
| 949 | AVStream *st = s->streams[pkt->stream_index]; |
| 950 | int64_t pos = avio_tell(pb); |
| 951 | int padding = 0; |
| 952 | unsigned packet_start_offset = avio_tell(pb) / 1024; |
| 953 | int ret; |
| 954 | |
| 955 | gxf_write_packet_header(pb, PKT_MEDIA); |
| 956 | if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ |
| 957 | padding = 4 - pkt->size % 4; |
| 958 | else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
| 959 | padding = GXF_AUDIO_PACKET_SIZE - pkt->size; |
| 960 | gxf_write_media_preamble(s, pkt, pkt->size + padding); |
| 961 | avio_write(pb, pkt->data, pkt->size); |
| 962 | gxf_write_padding(pb, padding); |
| 963 | |
| 964 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 965 | if (!(gxf->flt_entries_nb % 500)) { |
| 966 | int err; |
| 967 | if ((err = av_reallocp_array(&gxf->flt_entries, |
| 968 | gxf->flt_entries_nb + 500, |
| 969 | sizeof(*gxf->flt_entries))) < 0) { |
| 970 | gxf->flt_entries_nb = 0; |
| 971 | gxf->nb_fields = 0; |
| 972 | av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n"); |
| 973 | return err; |
| 974 | } |
| 975 | } |
| 976 | gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset; |
| 977 | gxf->nb_fields += 2; // count fields |
| 978 | } |
| 979 | |
| 980 | updatePacketSize(pb, pos); |
| 981 | |
| 982 | gxf->packet_count++; |
| 983 | if (gxf->packet_count == 100) { |
| 984 | if ((ret = gxf_write_map_packet(s, 0)) < 0) |
| 985 | return ret; |
| 986 | gxf->packet_count = 0; |
| 987 | } |
| 988 | |
| 989 | return 0; |
| 990 | } |
| 991 | |
| 992 | static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur) |
| 993 | { |
| 994 | GXFContext *gxf = s->priv_data; |
| 995 | AVPacket *pkt[2] = { cur, next }; |
| 996 | int i, field_nb[2]; |
| 997 | GXFStreamContext *sc[2]; |
| 998 | |
| 999 | for (i = 0; i < 2; i++) { |
| 1000 | AVStream *st = s->streams[pkt[i]->stream_index]; |
| 1001 | sc[i] = st->priv_data; |
| 1002 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 1003 | field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den, |
| 1004 | (int64_t)48000*gxf->time_base.num, AV_ROUND_UP); |
| 1005 | field_nb[i] &= ~1; // compare against even field number because audio must be before video |
| 1006 | } else |
| 1007 | field_nb[i] = pkt[i]->dts; // dts are field based |
| 1008 | } |
| 1009 | |
| 1010 | return field_nb[1] > field_nb[0] || |
| 1011 | (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order); |
| 1012 | } |
| 1013 | |
| 1014 | static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) |
| 1015 | { |
| 1016 | if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 1017 | pkt->duration = 2; // enforce 2 fields |
| 1018 | return ff_audio_rechunk_interleave(s, out, pkt, flush, |
| 1019 | ff_interleave_packet_per_dts, gxf_compare_field_nb); |
| 1020 | } |
| 1021 | |
| 1022 | AVOutputFormat ff_gxf_muxer = { |
| 1023 | .name = "gxf", |
| 1024 | .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"), |
| 1025 | .extensions = "gxf", |
| 1026 | .priv_data_size = sizeof(GXFContext), |
| 1027 | .audio_codec = AV_CODEC_ID_PCM_S16LE, |
| 1028 | .video_codec = AV_CODEC_ID_MPEG2VIDEO, |
| 1029 | .write_header = gxf_write_header, |
| 1030 | .write_packet = gxf_write_packet, |
| 1031 | .write_trailer = gxf_write_trailer, |
| 1032 | .interleave_packet = gxf_interleave_packet, |
| 1033 | }; |