Libav
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00001 /* 00002 * GXF muxer. 00003 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #include "avformat.h" 00023 #include "gxf.h" 00024 #include "riff.h" 00025 #include "audiointerleave.h" 00026 00027 #define GXF_AUDIO_PACKET_SIZE 65536 00028 00029 typedef struct GXFStreamContext { 00030 AudioInterleaveContext aic; 00031 uint32_t track_type; 00032 uint32_t sample_size; 00033 uint32_t sample_rate; 00034 uint16_t media_type; 00035 uint16_t media_info; 00036 int frame_rate_index; 00037 int lines_index; 00038 int fields; 00039 int iframes; 00040 int pframes; 00041 int bframes; 00042 int p_per_gop; 00043 int b_per_i_or_p; 00044 int first_gop_closed; 00045 unsigned order; 00046 } GXFStreamContext; 00047 00048 typedef struct GXFContext { 00049 uint32_t nb_fields; 00050 uint16_t audio_tracks; 00051 uint16_t mpeg_tracks; 00052 int64_t creation_time; 00053 uint32_t umf_start_offset; 00054 uint32_t umf_track_offset; 00055 uint32_t umf_media_offset; 00056 uint32_t umf_length; 00057 uint16_t umf_track_size; 00058 uint16_t umf_media_size; 00059 AVRational time_base; 00060 int flags; 00061 GXFStreamContext timecode_track; 00062 unsigned *flt_entries; 00063 unsigned flt_entries_nb; 00064 uint64_t *map_offsets; 00065 unsigned map_offsets_nb; 00066 unsigned packet_count; 00067 } GXFContext; 00068 00069 static const struct { 00070 int height, index; 00071 } gxf_lines_tab[] = { 00072 { 480, 1 }, /* NTSC */ 00073 { 512, 1 }, /* NTSC + VBI */ 00074 { 576, 2 }, /* PAL */ 00075 { 608, 2 }, /* PAL + VBI */ 00076 { 1080, 4 }, 00077 { 720, 6 }, 00078 }; 00079 00080 static const AVCodecTag gxf_media_types[] = { 00081 { CODEC_ID_MJPEG , 3 }, /* NTSC */ 00082 { CODEC_ID_MJPEG , 4 }, /* PAL */ 00083 { CODEC_ID_PCM_S24LE , 9 }, 00084 { CODEC_ID_PCM_S16LE , 10 }, 00085 { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */ 00086 { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */ 00087 { CODEC_ID_DVVIDEO , 13 }, /* NTSC */ 00088 { CODEC_ID_DVVIDEO , 14 }, /* PAL */ 00089 { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */ 00090 { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */ 00091 { CODEC_ID_AC3 , 17 }, 00092 //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */ 00093 { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */ 00094 { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */ 00095 { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */ 00096 { CODEC_ID_NONE, 0 }, 00097 }; 00098 00099 #define SERVER_PATH "EXT:/PDR/default/" 00100 #define ES_NAME_PATTERN "EXT:/PDR/default/ES." 00101 00102 static int gxf_find_lines_index(AVStream *st) 00103 { 00104 GXFStreamContext *sc = st->priv_data; 00105 int i; 00106 00107 for (i = 0; i < 6; ++i) { 00108 if (st->codec->height == gxf_lines_tab[i].height) { 00109 sc->lines_index = gxf_lines_tab[i].index; 00110 return 0; 00111 } 00112 } 00113 return -1; 00114 } 00115 00116 static void gxf_write_padding(ByteIOContext *pb, int64_t to_pad) 00117 { 00118 for (; to_pad > 0; to_pad--) { 00119 put_byte(pb, 0); 00120 } 00121 } 00122 00123 static int64_t updatePacketSize(ByteIOContext *pb, int64_t pos) 00124 { 00125 int64_t curpos; 00126 int size; 00127 00128 size = url_ftell(pb) - pos; 00129 if (size % 4) { 00130 gxf_write_padding(pb, 4 - size % 4); 00131 size = url_ftell(pb) - pos; 00132 } 00133 curpos = url_ftell(pb); 00134 url_fseek(pb, pos + 6, SEEK_SET); 00135 put_be32(pb, size); 00136 url_fseek(pb, curpos, SEEK_SET); 00137 return curpos - pos; 00138 } 00139 00140 static int64_t updateSize(ByteIOContext *pb, int64_t pos) 00141 { 00142 int64_t curpos; 00143 00144 curpos = url_ftell(pb); 00145 url_fseek(pb, pos, SEEK_SET); 00146 put_be16(pb, curpos - pos - 2); 00147 url_fseek(pb, curpos, SEEK_SET); 00148 return curpos - pos; 00149 } 00150 00151 static void gxf_write_packet_header(ByteIOContext *pb, GXFPktType type) 00152 { 00153 put_be32(pb, 0); /* packet leader for synchro */ 00154 put_byte(pb, 1); 00155 put_byte(pb, type); /* map packet */ 00156 put_be32(pb, 0); /* size */ 00157 put_be32(pb, 0); /* reserved */ 00158 put_byte(pb, 0xE1); /* trailer 1 */ 00159 put_byte(pb, 0xE2); /* trailer 2 */ 00160 } 00161 00162 static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, AVStream *st) 00163 { 00164 GXFStreamContext *sc = st->priv_data; 00165 char buffer[1024]; 00166 int size, starting_line; 00167 00168 if (sc->iframes) { 00169 sc->p_per_gop = sc->pframes / sc->iframes; 00170 if (sc->pframes % sc->iframes) 00171 sc->p_per_gop++; 00172 if (sc->pframes) { 00173 sc->b_per_i_or_p = sc->bframes / sc->pframes; 00174 if (sc->bframes % sc->pframes) 00175 sc->b_per_i_or_p++; 00176 } 00177 if (sc->p_per_gop > 9) 00178 sc->p_per_gop = 9; /* ensure value won't take more than one char */ 00179 if (sc->b_per_i_or_p > 9) 00180 sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */ 00181 } 00182 if (st->codec->height == 512 || st->codec->height == 608) 00183 starting_line = 7; // VBI 00184 else if (st->codec->height == 480) 00185 starting_line = 20; 00186 else 00187 starting_line = 23; // default PAL 00188 00189 size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n" 00190 "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n", 00191 (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p, 00192 st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1, 00193 starting_line, st->codec->height / 16); 00194 put_byte(pb, TRACK_MPG_AUX); 00195 put_byte(pb, size + 1); 00196 put_buffer(pb, (uint8_t *)buffer, size + 1); 00197 return size + 3; 00198 } 00199 00200 static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *sc) 00201 { 00202 put_byte(pb, 0); /* fields */ 00203 put_byte(pb, 0); /* seconds */ 00204 put_byte(pb, 0); /* minutes */ 00205 put_byte(pb, 0); /* flags + hours */ 00206 /* reserved */ 00207 put_be32(pb, 0); 00208 return 8; 00209 } 00210 00211 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index) 00212 { 00213 ByteIOContext *pb = s->pb; 00214 int64_t pos; 00215 int mpeg = sc->track_type == 4 || sc->track_type == 9; 00216 00217 /* track description section */ 00218 put_byte(pb, sc->media_type + 0x80); 00219 put_byte(pb, index + 0xC0); 00220 00221 pos = url_ftell(pb); 00222 put_be16(pb, 0); /* size */ 00223 00224 /* media file name */ 00225 put_byte(pb, TRACK_NAME); 00226 put_byte(pb, strlen(ES_NAME_PATTERN) + 3); 00227 put_tag(pb, ES_NAME_PATTERN); 00228 put_be16(pb, sc->media_info); 00229 put_byte(pb, 0); 00230 00231 if (!mpeg) { 00232 /* auxiliary information */ 00233 put_byte(pb, TRACK_AUX); 00234 put_byte(pb, 8); 00235 if (sc->track_type == 3) 00236 gxf_write_timecode_auxiliary(pb, sc); 00237 else 00238 put_le64(pb, 0); 00239 } 00240 00241 /* file system version */ 00242 put_byte(pb, TRACK_VER); 00243 put_byte(pb, 4); 00244 put_be32(pb, 0); 00245 00246 if (mpeg) 00247 gxf_write_mpeg_auxiliary(pb, s->streams[index]); 00248 00249 /* frame rate */ 00250 put_byte(pb, TRACK_FPS); 00251 put_byte(pb, 4); 00252 put_be32(pb, sc->frame_rate_index); 00253 00254 /* lines per frame */ 00255 put_byte(pb, TRACK_LINES); 00256 put_byte(pb, 4); 00257 put_be32(pb, sc->lines_index); 00258 00259 /* fields per frame */ 00260 put_byte(pb, TRACK_FPF); 00261 put_byte(pb, 4); 00262 put_be32(pb, sc->fields); 00263 00264 return updateSize(pb, pos); 00265 } 00266 00267 static int gxf_write_material_data_section(AVFormatContext *s) 00268 { 00269 GXFContext *gxf = s->priv_data; 00270 ByteIOContext *pb = s->pb; 00271 int64_t pos; 00272 const char *filename = strrchr(s->filename, '/'); 00273 00274 pos = url_ftell(pb); 00275 put_be16(pb, 0); /* size */ 00276 00277 /* name */ 00278 if (filename) 00279 filename++; 00280 else 00281 filename = s->filename; 00282 put_byte(pb, MAT_NAME); 00283 put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1); 00284 put_tag(pb, SERVER_PATH); 00285 put_tag(pb, filename); 00286 put_byte(pb, 0); 00287 00288 /* first field */ 00289 put_byte(pb, MAT_FIRST_FIELD); 00290 put_byte(pb, 4); 00291 put_be32(pb, 0); 00292 00293 /* last field */ 00294 put_byte(pb, MAT_LAST_FIELD); 00295 put_byte(pb, 4); 00296 put_be32(pb, gxf->nb_fields); 00297 00298 /* reserved */ 00299 put_byte(pb, MAT_MARK_IN); 00300 put_byte(pb, 4); 00301 put_be32(pb, 0); 00302 00303 put_byte(pb, MAT_MARK_OUT); 00304 put_byte(pb, 4); 00305 put_be32(pb, gxf->nb_fields); 00306 00307 /* estimated size */ 00308 put_byte(pb, MAT_SIZE); 00309 put_byte(pb, 4); 00310 put_be32(pb, url_fsize(pb) / 1024); 00311 00312 return updateSize(pb, pos); 00313 } 00314 00315 static int gxf_write_track_description_section(AVFormatContext *s) 00316 { 00317 GXFContext *gxf = s->priv_data; 00318 ByteIOContext *pb = s->pb; 00319 int64_t pos; 00320 int i; 00321 00322 pos = url_ftell(pb); 00323 put_be16(pb, 0); /* size */ 00324 for (i = 0; i < s->nb_streams; ++i) 00325 gxf_write_track_description(s, s->streams[i]->priv_data, i); 00326 00327 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams); 00328 00329 return updateSize(pb, pos); 00330 } 00331 00332 static int gxf_write_map_packet(AVFormatContext *s, int rewrite) 00333 { 00334 GXFContext *gxf = s->priv_data; 00335 ByteIOContext *pb = s->pb; 00336 int64_t pos = url_ftell(pb); 00337 00338 if (!rewrite) { 00339 if (!(gxf->map_offsets_nb % 30)) { 00340 gxf->map_offsets = av_realloc(gxf->map_offsets, 00341 (gxf->map_offsets_nb+30)*sizeof(*gxf->map_offsets)); 00342 if (!gxf->map_offsets) { 00343 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n"); 00344 return -1; 00345 } 00346 } 00347 gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here 00348 } 00349 00350 gxf_write_packet_header(pb, PKT_MAP); 00351 00352 /* preamble */ 00353 put_byte(pb, 0xE0); /* version */ 00354 put_byte(pb, 0xFF); /* reserved */ 00355 00356 gxf_write_material_data_section(s); 00357 gxf_write_track_description_section(s); 00358 00359 return updatePacketSize(pb, pos); 00360 } 00361 00362 static int gxf_write_flt_packet(AVFormatContext *s) 00363 { 00364 GXFContext *gxf = s->priv_data; 00365 ByteIOContext *pb = s->pb; 00366 int64_t pos = url_ftell(pb); 00367 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1; 00368 int flt_entries = gxf->nb_fields / fields_per_flt - 1; 00369 int i = 0; 00370 00371 gxf_write_packet_header(pb, PKT_FLT); 00372 00373 put_le32(pb, fields_per_flt); /* number of fields */ 00374 put_le32(pb, flt_entries); /* number of active flt entries */ 00375 00376 if (gxf->flt_entries) { 00377 for (i = 0; i < flt_entries; i++) 00378 put_le32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]); 00379 } 00380 00381 for (; i < 1000; i++) 00382 put_le32(pb, 0); 00383 00384 return updatePacketSize(pb, pos); 00385 } 00386 00387 static int gxf_write_umf_material_description(AVFormatContext *s) 00388 { 00389 GXFContext *gxf = s->priv_data; 00390 ByteIOContext *pb = s->pb; 00391 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50; 00392 00393 // XXX drop frame 00394 uint32_t timecode = 00395 gxf->nb_fields / (timecode_base * 3600) % 24 << 24 | // hours 00396 gxf->nb_fields / (timecode_base * 60) % 60 << 16 | // minutes 00397 gxf->nb_fields / timecode_base % 60 << 8 | // seconds 00398 gxf->nb_fields % timecode_base; // fields 00399 00400 put_le32(pb, gxf->flags); 00401 put_le32(pb, gxf->nb_fields); /* length of the longest track */ 00402 put_le32(pb, gxf->nb_fields); /* length of the shortest track */ 00403 put_le32(pb, 0); /* mark in */ 00404 put_le32(pb, gxf->nb_fields); /* mark out */ 00405 put_le32(pb, 0); /* timecode mark in */ 00406 put_le32(pb, timecode); /* timecode mark out */ 00407 put_le64(pb, s->timestamp); /* modification time */ 00408 put_le64(pb, s->timestamp); /* creation time */ 00409 put_le16(pb, 0); /* reserved */ 00410 put_le16(pb, 0); /* reserved */ 00411 put_le16(pb, gxf->audio_tracks); 00412 put_le16(pb, 1); /* timecode track count */ 00413 put_le16(pb, 0); /* reserved */ 00414 put_le16(pb, gxf->mpeg_tracks); 00415 return 48; 00416 } 00417 00418 static int gxf_write_umf_payload(AVFormatContext *s) 00419 { 00420 GXFContext *gxf = s->priv_data; 00421 ByteIOContext *pb = s->pb; 00422 00423 put_le32(pb, gxf->umf_length); /* total length of the umf data */ 00424 put_le32(pb, 3); /* version */ 00425 put_le32(pb, s->nb_streams+1); 00426 put_le32(pb, gxf->umf_track_offset); /* umf track section offset */ 00427 put_le32(pb, gxf->umf_track_size); 00428 put_le32(pb, s->nb_streams+1); 00429 put_le32(pb, gxf->umf_media_offset); 00430 put_le32(pb, gxf->umf_media_size); 00431 put_le32(pb, gxf->umf_length); /* user data offset */ 00432 put_le32(pb, 0); /* user data size */ 00433 put_le32(pb, 0); /* reserved */ 00434 put_le32(pb, 0); /* reserved */ 00435 return 48; 00436 } 00437 00438 static int gxf_write_umf_track_description(AVFormatContext *s) 00439 { 00440 ByteIOContext *pb = s->pb; 00441 GXFContext *gxf = s->priv_data; 00442 int64_t pos = url_ftell(pb); 00443 int i; 00444 00445 gxf->umf_track_offset = pos - gxf->umf_start_offset; 00446 for (i = 0; i < s->nb_streams; ++i) { 00447 GXFStreamContext *sc = s->streams[i]->priv_data; 00448 put_le16(pb, sc->media_info); 00449 put_le16(pb, 1); 00450 } 00451 00452 put_le16(pb, gxf->timecode_track.media_info); 00453 put_le16(pb, 1); 00454 00455 return url_ftell(pb) - pos; 00456 } 00457 00458 static int gxf_write_umf_media_mpeg(ByteIOContext *pb, AVStream *st) 00459 { 00460 GXFStreamContext *sc = st->priv_data; 00461 00462 if (st->codec->pix_fmt == PIX_FMT_YUV422P) 00463 put_le32(pb, 2); 00464 else 00465 put_le32(pb, 1); /* default to 420 */ 00466 put_le32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */ 00467 put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */ 00468 put_le32(pb, 1); /* I picture per GOP */ 00469 put_le32(pb, sc->p_per_gop); 00470 put_le32(pb, sc->b_per_i_or_p); 00471 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) 00472 put_le32(pb, 2); 00473 else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO) 00474 put_le32(pb, 1); 00475 else 00476 put_le32(pb, 0); 00477 put_le32(pb, 0); /* reserved */ 00478 return 32; 00479 } 00480 00481 static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *sc) 00482 { 00483 put_le32(pb, 1); /* non drop frame */ 00484 put_le32(pb, 0); /* reserved */ 00485 put_le32(pb, 0); /* reserved */ 00486 put_le32(pb, 0); /* reserved */ 00487 put_le32(pb, 0); /* reserved */ 00488 put_le32(pb, 0); /* reserved */ 00489 put_le32(pb, 0); /* reserved */ 00490 put_le32(pb, 0); /* reserved */ 00491 return 32; 00492 } 00493 00494 static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *sc) 00495 { 00496 int i; 00497 00498 for (i = 0; i < 8; i++) { 00499 put_be32(pb, 0); 00500 } 00501 return 32; 00502 } 00503 00504 static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *sc) 00505 { 00506 put_le64(pb, av_dbl2int(1)); /* sound level to begin to */ 00507 put_le64(pb, av_dbl2int(1)); /* sound level to begin to */ 00508 put_le32(pb, 0); /* number of fields over which to ramp up sound level */ 00509 put_le32(pb, 0); /* number of fields over which to ramp down sound level */ 00510 put_le32(pb, 0); /* reserved */ 00511 put_le32(pb, 0); /* reserved */ 00512 return 32; 00513 } 00514 00515 #if 0 00516 static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *sc) 00517 { 00518 put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */ 00519 put_be64(pb, 0); /* FIXME FLOAT max luma quant level */ 00520 put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */ 00521 put_be64(pb, 0); /* FIXME FLOAT min luma quant level */ 00522 return 32; 00523 } 00524 #endif 00525 00526 static int gxf_write_umf_media_description(AVFormatContext *s) 00527 { 00528 GXFContext *gxf = s->priv_data; 00529 ByteIOContext *pb = s->pb; 00530 int64_t pos; 00531 int i, j; 00532 00533 pos = url_ftell(pb); 00534 gxf->umf_media_offset = pos - gxf->umf_start_offset; 00535 for (i = 0; i <= s->nb_streams; ++i) { 00536 GXFStreamContext *sc; 00537 int64_t startpos, curpos; 00538 00539 if (i == s->nb_streams) 00540 sc = &gxf->timecode_track; 00541 else 00542 sc = s->streams[i]->priv_data; 00543 00544 startpos = url_ftell(pb); 00545 put_le16(pb, 0); /* length */ 00546 put_le16(pb, sc->media_info); 00547 put_le16(pb, 0); /* reserved */ 00548 put_le16(pb, 0); /* reserved */ 00549 put_le32(pb, gxf->nb_fields); 00550 put_le32(pb, 0); /* attributes rw, ro */ 00551 put_le32(pb, 0); /* mark in */ 00552 put_le32(pb, gxf->nb_fields); /* mark out */ 00553 put_buffer(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN)); 00554 put_be16(pb, sc->media_info); 00555 for (j = sizeof(ES_NAME_PATTERN)+2; j < 88; j++) 00556 put_byte(pb, 0); 00557 put_le32(pb, sc->track_type); 00558 put_le32(pb, sc->sample_rate); 00559 put_le32(pb, sc->sample_size); 00560 put_le32(pb, 0); /* reserved */ 00561 00562 if (sc == &gxf->timecode_track) 00563 gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */ 00564 else { 00565 AVStream *st = s->streams[i]; 00566 switch (st->codec->codec_id) { 00567 case CODEC_ID_MPEG2VIDEO: 00568 gxf_write_umf_media_mpeg(pb, st); 00569 break; 00570 case CODEC_ID_PCM_S16LE: 00571 gxf_write_umf_media_audio(pb, sc); 00572 break; 00573 case CODEC_ID_DVVIDEO: 00574 gxf_write_umf_media_dv(pb, sc); 00575 break; 00576 } 00577 } 00578 00579 curpos = url_ftell(pb); 00580 url_fseek(pb, startpos, SEEK_SET); 00581 put_le16(pb, curpos - startpos); 00582 url_fseek(pb, curpos, SEEK_SET); 00583 } 00584 return url_ftell(pb) - pos; 00585 } 00586 00587 static int gxf_write_umf_packet(AVFormatContext *s) 00588 { 00589 GXFContext *gxf = s->priv_data; 00590 ByteIOContext *pb = s->pb; 00591 int64_t pos = url_ftell(pb); 00592 00593 gxf_write_packet_header(pb, PKT_UMF); 00594 00595 /* preamble */ 00596 put_byte(pb, 3); /* first and last (only) packet */ 00597 put_be32(pb, gxf->umf_length); /* data length */ 00598 00599 gxf->umf_start_offset = url_ftell(pb); 00600 gxf_write_umf_payload(s); 00601 gxf_write_umf_material_description(s); 00602 gxf->umf_track_size = gxf_write_umf_track_description(s); 00603 gxf->umf_media_size = gxf_write_umf_media_description(s); 00604 gxf->umf_length = url_ftell(pb) - gxf->umf_start_offset; 00605 return updatePacketSize(pb, pos); 00606 } 00607 00608 static const int GXF_samples_per_frame[] = { 32768, 0 }; 00609 00610 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc) 00611 { 00612 if (!vsc) 00613 return; 00614 00615 sc->media_type = vsc->sample_rate == 60 ? 7 : 8; 00616 sc->sample_rate = vsc->sample_rate; 00617 sc->media_info = ('T'<<8) | '0'; 00618 sc->track_type = 3; 00619 sc->frame_rate_index = vsc->frame_rate_index; 00620 sc->lines_index = vsc->lines_index; 00621 sc->sample_size = 16; 00622 sc->fields = vsc->fields; 00623 } 00624 00625 static int gxf_write_header(AVFormatContext *s) 00626 { 00627 ByteIOContext *pb = s->pb; 00628 GXFContext *gxf = s->priv_data; 00629 GXFStreamContext *vsc = NULL; 00630 uint8_t tracks[255] = {0}; 00631 int i, media_info = 0; 00632 00633 if (url_is_streamed(pb)) { 00634 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome"); 00635 return -1; 00636 } 00637 00638 gxf->flags |= 0x00080000; /* material is simple clip */ 00639 for (i = 0; i < s->nb_streams; ++i) { 00640 AVStream *st = s->streams[i]; 00641 GXFStreamContext *sc = av_mallocz(sizeof(*sc)); 00642 if (!sc) 00643 return AVERROR(ENOMEM); 00644 st->priv_data = sc; 00645 00646 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id); 00647 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 00648 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) { 00649 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n"); 00650 return -1; 00651 } 00652 if (st->codec->sample_rate != 48000) { 00653 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n"); 00654 return -1; 00655 } 00656 if (st->codec->channels != 1) { 00657 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n"); 00658 return -1; 00659 } 00660 sc->track_type = 2; 00661 sc->sample_rate = st->codec->sample_rate; 00662 av_set_pts_info(st, 64, 1, sc->sample_rate); 00663 sc->sample_size = 16; 00664 sc->frame_rate_index = -2; 00665 sc->lines_index = -2; 00666 sc->fields = -2; 00667 gxf->audio_tracks++; 00668 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */ 00669 media_info = 'A'; 00670 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00671 if (i != 0) { 00672 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n"); 00673 return -1; 00674 } 00675 /* FIXME check from time_base ? */ 00676 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */ 00677 sc->frame_rate_index = 5; 00678 sc->sample_rate = 60; 00679 gxf->flags |= 0x00000080; 00680 gxf->time_base = (AVRational){ 1001, 60000 }; 00681 } else { /* assume PAL */ 00682 sc->frame_rate_index = 6; 00683 sc->media_type++; 00684 sc->sample_rate = 50; 00685 gxf->flags |= 0x00000040; 00686 gxf->time_base = (AVRational){ 1, 50 }; 00687 } 00688 av_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den); 00689 if (gxf_find_lines_index(st) < 0) 00690 sc->lines_index = -1; 00691 sc->sample_size = st->codec->bit_rate; 00692 sc->fields = 2; /* interlaced */ 00693 00694 vsc = sc; 00695 00696 switch (st->codec->codec_id) { 00697 case CODEC_ID_MJPEG: 00698 sc->track_type = 1; 00699 gxf->flags |= 0x00004000; 00700 media_info = 'J'; 00701 break; 00702 case CODEC_ID_MPEG1VIDEO: 00703 sc->track_type = 9; 00704 gxf->mpeg_tracks++; 00705 media_info = 'L'; 00706 break; 00707 case CODEC_ID_MPEG2VIDEO: 00708 sc->first_gop_closed = -1; 00709 sc->track_type = 4; 00710 gxf->mpeg_tracks++; 00711 gxf->flags |= 0x00008000; 00712 media_info = 'M'; 00713 break; 00714 case CODEC_ID_DVVIDEO: 00715 if (st->codec->pix_fmt == PIX_FMT_YUV422P) { 00716 sc->media_type += 2; 00717 sc->track_type = 6; 00718 gxf->flags |= 0x00002000; 00719 media_info = 'E'; 00720 } else { 00721 sc->track_type = 5; 00722 gxf->flags |= 0x00001000; 00723 media_info = 'D'; 00724 } 00725 break; 00726 default: 00727 av_log(s, AV_LOG_ERROR, "video codec not supported\n"); 00728 return -1; 00729 } 00730 } 00731 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */ 00732 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++); 00733 sc->order = s->nb_streams - st->index; 00734 } 00735 00736 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0) 00737 return -1; 00738 00739 gxf_init_timecode_track(&gxf->timecode_track, vsc); 00740 gxf->flags |= 0x200000; // time code track is non-drop frame 00741 00742 gxf_write_map_packet(s, 0); 00743 gxf_write_flt_packet(s); 00744 gxf_write_umf_packet(s); 00745 00746 gxf->packet_count = 3; 00747 00748 put_flush_packet(pb); 00749 return 0; 00750 } 00751 00752 static int gxf_write_eos_packet(ByteIOContext *pb) 00753 { 00754 int64_t pos = url_ftell(pb); 00755 00756 gxf_write_packet_header(pb, PKT_EOS); 00757 return updatePacketSize(pb, pos); 00758 } 00759 00760 static int gxf_write_trailer(AVFormatContext *s) 00761 { 00762 GXFContext *gxf = s->priv_data; 00763 ByteIOContext *pb = s->pb; 00764 int64_t end; 00765 int i; 00766 00767 ff_audio_interleave_close(s); 00768 00769 gxf_write_eos_packet(pb); 00770 end = url_ftell(pb); 00771 url_fseek(pb, 0, SEEK_SET); 00772 /* overwrite map, flt and umf packets with new values */ 00773 gxf_write_map_packet(s, 1); 00774 gxf_write_flt_packet(s); 00775 gxf_write_umf_packet(s); 00776 put_flush_packet(pb); 00777 /* update duration in all map packets */ 00778 for (i = 1; i < gxf->map_offsets_nb; i++) { 00779 url_fseek(pb, gxf->map_offsets[i], SEEK_SET); 00780 gxf_write_map_packet(s, 1); 00781 put_flush_packet(pb); 00782 } 00783 00784 url_fseek(pb, end, SEEK_SET); 00785 00786 av_freep(&gxf->flt_entries); 00787 av_freep(&gxf->map_offsets); 00788 00789 return 0; 00790 } 00791 00792 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size) 00793 { 00794 uint32_t c=-1; 00795 int i; 00796 for(i=0; i<size-4 && c!=0x100; i++){ 00797 c = (c<<8) + buf[i]; 00798 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */ 00799 sc->first_gop_closed= (buf[i+4]>>6)&1; 00800 } 00801 return (buf[i+1]>>3)&7; 00802 } 00803 00804 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size) 00805 { 00806 GXFContext *gxf = s->priv_data; 00807 ByteIOContext *pb = s->pb; 00808 AVStream *st = s->streams[pkt->stream_index]; 00809 GXFStreamContext *sc = st->priv_data; 00810 unsigned field_nb; 00811 /* If the video is frame-encoded, the frame numbers shall be represented by 00812 * even field numbers. 00813 * see SMPTE360M-2004 6.4.2.1.3 Media field number */ 00814 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00815 field_nb = gxf->nb_fields; 00816 } else { 00817 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den, 00818 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP); 00819 } 00820 00821 put_byte(pb, sc->media_type); 00822 put_byte(pb, st->index); 00823 put_be32(pb, field_nb); 00824 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 00825 put_be16(pb, 0); 00826 put_be16(pb, size / 2); 00827 } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) { 00828 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size); 00829 if (frame_type == FF_I_TYPE) { 00830 put_byte(pb, 0x0d); 00831 sc->iframes++; 00832 } else if (frame_type == FF_B_TYPE) { 00833 put_byte(pb, 0x0f); 00834 sc->bframes++; 00835 } else { 00836 put_byte(pb, 0x0e); 00837 sc->pframes++; 00838 } 00839 put_be24(pb, size); 00840 } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) { 00841 put_byte(pb, size / 4096); 00842 put_be24(pb, 0); 00843 } else 00844 put_be32(pb, size); 00845 put_be32(pb, field_nb); 00846 put_byte(pb, 1); /* flags */ 00847 put_byte(pb, 0); /* reserved */ 00848 return 16; 00849 } 00850 00851 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) 00852 { 00853 GXFContext *gxf = s->priv_data; 00854 ByteIOContext *pb = s->pb; 00855 AVStream *st = s->streams[pkt->stream_index]; 00856 int64_t pos = url_ftell(pb); 00857 int padding = 0; 00858 00859 gxf_write_packet_header(pb, PKT_MEDIA); 00860 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ 00861 padding = 4 - pkt->size % 4; 00862 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) 00863 padding = GXF_AUDIO_PACKET_SIZE - pkt->size; 00864 gxf_write_media_preamble(s, pkt, pkt->size + padding); 00865 put_buffer(pb, pkt->data, pkt->size); 00866 gxf_write_padding(pb, padding); 00867 00868 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00869 if (!(gxf->flt_entries_nb % 500)) { 00870 gxf->flt_entries = av_realloc(gxf->flt_entries, 00871 (gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries)); 00872 if (!gxf->flt_entries) { 00873 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n"); 00874 return -1; 00875 } 00876 } 00877 gxf->flt_entries[gxf->flt_entries_nb++] = url_ftell(pb) / 1024; 00878 gxf->nb_fields += 2; // count fields 00879 } 00880 00881 updatePacketSize(pb, pos); 00882 00883 gxf->packet_count++; 00884 if (gxf->packet_count == 100) { 00885 gxf_write_map_packet(s, 0); 00886 gxf->packet_count = 0; 00887 } 00888 00889 put_flush_packet(pb); 00890 00891 return 0; 00892 } 00893 00894 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur) 00895 { 00896 GXFContext *gxf = s->priv_data; 00897 AVPacket *pkt[2] = { cur, next }; 00898 int i, field_nb[2]; 00899 GXFStreamContext *sc[2]; 00900 00901 for (i = 0; i < 2; i++) { 00902 AVStream *st = s->streams[pkt[i]->stream_index]; 00903 sc[i] = st->priv_data; 00904 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 00905 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den, 00906 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP); 00907 field_nb[i] &= ~1; // compare against even field number because audio must be before video 00908 } else 00909 field_nb[i] = pkt[i]->dts; // dts are field based 00910 } 00911 00912 return field_nb[1] > field_nb[0] || 00913 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order); 00914 } 00915 00916 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) 00917 { 00918 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO) 00919 pkt->duration = 2; // enforce 2 fields 00920 return ff_audio_rechunk_interleave(s, out, pkt, flush, 00921 av_interleave_packet_per_dts, gxf_compare_field_nb); 00922 } 00923 00924 AVOutputFormat gxf_muxer = { 00925 "gxf", 00926 NULL_IF_CONFIG_SMALL("GXF format"), 00927 NULL, 00928 "gxf", 00929 sizeof(GXFContext), 00930 CODEC_ID_PCM_S16LE, 00931 CODEC_ID_MPEG2VIDEO, 00932 gxf_write_header, 00933 gxf_write_packet, 00934 gxf_write_trailer, 00935 0, 00936 NULL, 00937 gxf_interleave_packet, 00938 };