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00022 #include "libavutil/intfloat.h"
00023 #include "libavutil/mathematics.h"
00024 #include "avformat.h"
00025 #include "internal.h"
00026 #include "gxf.h"
00027 #include "riff.h"
00028 #include "audiointerleave.h"
00029
00030 #define GXF_AUDIO_PACKET_SIZE 65536
00031
00032 typedef struct GXFStreamContext {
00033 AudioInterleaveContext aic;
00034 uint32_t track_type;
00035 uint32_t sample_size;
00036 uint32_t sample_rate;
00037 uint16_t media_type;
00038 uint16_t media_info;
00039 int frame_rate_index;
00040 int lines_index;
00041 int fields;
00042 int iframes;
00043 int pframes;
00044 int bframes;
00045 int p_per_gop;
00046 int b_per_i_or_p;
00047 int first_gop_closed;
00048 unsigned order;
00049 } GXFStreamContext;
00050
00051 typedef struct GXFContext {
00052 uint32_t nb_fields;
00053 uint16_t audio_tracks;
00054 uint16_t mpeg_tracks;
00055 int64_t creation_time;
00056 uint32_t umf_start_offset;
00057 uint32_t umf_track_offset;
00058 uint32_t umf_media_offset;
00059 uint32_t umf_length;
00060 uint16_t umf_track_size;
00061 uint16_t umf_media_size;
00062 AVRational time_base;
00063 int flags;
00064 GXFStreamContext timecode_track;
00065 unsigned *flt_entries;
00066 unsigned flt_entries_nb;
00067 uint64_t *map_offsets;
00068 unsigned map_offsets_nb;
00069 unsigned packet_count;
00070 } GXFContext;
00071
00072 static const struct {
00073 int height, index;
00074 } gxf_lines_tab[] = {
00075 { 480, 1 },
00076 { 512, 1 },
00077 { 576, 2 },
00078 { 608, 2 },
00079 { 1080, 4 },
00080 { 720, 6 },
00081 };
00082
00083 static const AVCodecTag gxf_media_types[] = {
00084 { CODEC_ID_MJPEG , 3 },
00085 { CODEC_ID_MJPEG , 4 },
00086 { CODEC_ID_PCM_S24LE , 9 },
00087 { CODEC_ID_PCM_S16LE , 10 },
00088 { CODEC_ID_MPEG2VIDEO, 11 },
00089 { CODEC_ID_MPEG2VIDEO, 12 },
00090 { CODEC_ID_DVVIDEO , 13 },
00091 { CODEC_ID_DVVIDEO , 14 },
00092 { CODEC_ID_DVVIDEO , 15 },
00093 { CODEC_ID_DVVIDEO , 16 },
00094 { CODEC_ID_AC3 , 17 },
00095
00096 { CODEC_ID_MPEG2VIDEO, 20 },
00097 { CODEC_ID_MPEG1VIDEO, 22 },
00098 { CODEC_ID_MPEG1VIDEO, 23 },
00099 { CODEC_ID_NONE, 0 },
00100 };
00101
00102 #define SERVER_PATH "EXT:/PDR/default/"
00103 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
00104
00105 static int gxf_find_lines_index(AVStream *st)
00106 {
00107 GXFStreamContext *sc = st->priv_data;
00108 int i;
00109
00110 for (i = 0; i < 6; ++i) {
00111 if (st->codec->height == gxf_lines_tab[i].height) {
00112 sc->lines_index = gxf_lines_tab[i].index;
00113 return 0;
00114 }
00115 }
00116 return -1;
00117 }
00118
00119 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
00120 {
00121 for (; to_pad > 0; to_pad--) {
00122 avio_w8(pb, 0);
00123 }
00124 }
00125
00126 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
00127 {
00128 int64_t curpos;
00129 int size;
00130
00131 size = avio_tell(pb) - pos;
00132 if (size % 4) {
00133 gxf_write_padding(pb, 4 - size % 4);
00134 size = avio_tell(pb) - pos;
00135 }
00136 curpos = avio_tell(pb);
00137 avio_seek(pb, pos + 6, SEEK_SET);
00138 avio_wb32(pb, size);
00139 avio_seek(pb, curpos, SEEK_SET);
00140 return curpos - pos;
00141 }
00142
00143 static int64_t updateSize(AVIOContext *pb, int64_t pos)
00144 {
00145 int64_t curpos;
00146
00147 curpos = avio_tell(pb);
00148 avio_seek(pb, pos, SEEK_SET);
00149 avio_wb16(pb, curpos - pos - 2);
00150 avio_seek(pb, curpos, SEEK_SET);
00151 return curpos - pos;
00152 }
00153
00154 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
00155 {
00156 avio_wb32(pb, 0);
00157 avio_w8(pb, 1);
00158 avio_w8(pb, type);
00159 avio_wb32(pb, 0);
00160 avio_wb32(pb, 0);
00161 avio_w8(pb, 0xE1);
00162 avio_w8(pb, 0xE2);
00163 }
00164
00165 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
00166 {
00167 GXFStreamContext *sc = st->priv_data;
00168 char buffer[1024];
00169 int size, starting_line;
00170
00171 if (sc->iframes) {
00172 sc->p_per_gop = sc->pframes / sc->iframes;
00173 if (sc->pframes % sc->iframes)
00174 sc->p_per_gop++;
00175 if (sc->pframes) {
00176 sc->b_per_i_or_p = sc->bframes / sc->pframes;
00177 if (sc->bframes % sc->pframes)
00178 sc->b_per_i_or_p++;
00179 }
00180 if (sc->p_per_gop > 9)
00181 sc->p_per_gop = 9;
00182 if (sc->b_per_i_or_p > 9)
00183 sc->b_per_i_or_p = 9;
00184 }
00185 if (st->codec->height == 512 || st->codec->height == 608)
00186 starting_line = 7;
00187 else if (st->codec->height == 480)
00188 starting_line = 20;
00189 else
00190 starting_line = 23;
00191
00192 size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
00193 "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
00194 (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
00195 st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
00196 starting_line, (st->codec->height + 15) / 16);
00197 avio_w8(pb, TRACK_MPG_AUX);
00198 avio_w8(pb, size + 1);
00199 avio_write(pb, (uint8_t *)buffer, size + 1);
00200 return size + 3;
00201 }
00202
00203 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFStreamContext *sc)
00204 {
00205 avio_w8(pb, 0);
00206 avio_w8(pb, 0);
00207 avio_w8(pb, 0);
00208 avio_w8(pb, 0);
00209
00210 avio_wb32(pb, 0);
00211 return 8;
00212 }
00213
00214 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
00215 {
00216 AVIOContext *pb = s->pb;
00217 int64_t pos;
00218 int mpeg = sc->track_type == 4 || sc->track_type == 9;
00219
00220
00221 avio_w8(pb, sc->media_type + 0x80);
00222 avio_w8(pb, index + 0xC0);
00223
00224 pos = avio_tell(pb);
00225 avio_wb16(pb, 0);
00226
00227
00228 avio_w8(pb, TRACK_NAME);
00229 avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
00230 avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
00231 avio_wb16(pb, sc->media_info);
00232 avio_w8(pb, 0);
00233
00234 if (!mpeg) {
00235
00236 avio_w8(pb, TRACK_AUX);
00237 avio_w8(pb, 8);
00238 if (sc->track_type == 3)
00239 gxf_write_timecode_auxiliary(pb, sc);
00240 else
00241 avio_wl64(pb, 0);
00242 }
00243
00244
00245 avio_w8(pb, TRACK_VER);
00246 avio_w8(pb, 4);
00247 avio_wb32(pb, 0);
00248
00249 if (mpeg)
00250 gxf_write_mpeg_auxiliary(pb, s->streams[index]);
00251
00252
00253 avio_w8(pb, TRACK_FPS);
00254 avio_w8(pb, 4);
00255 avio_wb32(pb, sc->frame_rate_index);
00256
00257
00258 avio_w8(pb, TRACK_LINES);
00259 avio_w8(pb, 4);
00260 avio_wb32(pb, sc->lines_index);
00261
00262
00263 avio_w8(pb, TRACK_FPF);
00264 avio_w8(pb, 4);
00265 avio_wb32(pb, sc->fields);
00266
00267 return updateSize(pb, pos);
00268 }
00269
00270 static int gxf_write_material_data_section(AVFormatContext *s)
00271 {
00272 GXFContext *gxf = s->priv_data;
00273 AVIOContext *pb = s->pb;
00274 int64_t pos;
00275 int len;
00276 const char *filename = strrchr(s->filename, '/');
00277
00278 pos = avio_tell(pb);
00279 avio_wb16(pb, 0);
00280
00281
00282 if (filename)
00283 filename++;
00284 else
00285 filename = s->filename;
00286 len = strlen(filename);
00287
00288 avio_w8(pb, MAT_NAME);
00289 avio_w8(pb, strlen(SERVER_PATH) + len + 1);
00290 avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
00291 avio_write(pb, filename, len);
00292 avio_w8(pb, 0);
00293
00294
00295 avio_w8(pb, MAT_FIRST_FIELD);
00296 avio_w8(pb, 4);
00297 avio_wb32(pb, 0);
00298
00299
00300 avio_w8(pb, MAT_LAST_FIELD);
00301 avio_w8(pb, 4);
00302 avio_wb32(pb, gxf->nb_fields);
00303
00304
00305 avio_w8(pb, MAT_MARK_IN);
00306 avio_w8(pb, 4);
00307 avio_wb32(pb, 0);
00308
00309 avio_w8(pb, MAT_MARK_OUT);
00310 avio_w8(pb, 4);
00311 avio_wb32(pb, gxf->nb_fields);
00312
00313
00314 avio_w8(pb, MAT_SIZE);
00315 avio_w8(pb, 4);
00316 avio_wb32(pb, avio_size(pb) / 1024);
00317
00318 return updateSize(pb, pos);
00319 }
00320
00321 static int gxf_write_track_description_section(AVFormatContext *s)
00322 {
00323 GXFContext *gxf = s->priv_data;
00324 AVIOContext *pb = s->pb;
00325 int64_t pos;
00326 int i;
00327
00328 pos = avio_tell(pb);
00329 avio_wb16(pb, 0);
00330 for (i = 0; i < s->nb_streams; ++i)
00331 gxf_write_track_description(s, s->streams[i]->priv_data, i);
00332
00333 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
00334
00335 return updateSize(pb, pos);
00336 }
00337
00338 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
00339 {
00340 GXFContext *gxf = s->priv_data;
00341 AVIOContext *pb = s->pb;
00342 int64_t pos = avio_tell(pb);
00343
00344 if (!rewrite) {
00345 if (!(gxf->map_offsets_nb % 30)) {
00346 gxf->map_offsets = av_realloc(gxf->map_offsets,
00347 (gxf->map_offsets_nb+30)*sizeof(*gxf->map_offsets));
00348 if (!gxf->map_offsets) {
00349 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
00350 return -1;
00351 }
00352 }
00353 gxf->map_offsets[gxf->map_offsets_nb++] = pos;
00354 }
00355
00356 gxf_write_packet_header(pb, PKT_MAP);
00357
00358
00359 avio_w8(pb, 0xE0);
00360 avio_w8(pb, 0xFF);
00361
00362 gxf_write_material_data_section(s);
00363 gxf_write_track_description_section(s);
00364
00365 return updatePacketSize(pb, pos);
00366 }
00367
00368 static int gxf_write_flt_packet(AVFormatContext *s)
00369 {
00370 GXFContext *gxf = s->priv_data;
00371 AVIOContext *pb = s->pb;
00372 int64_t pos = avio_tell(pb);
00373 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
00374 int flt_entries = gxf->nb_fields / fields_per_flt;
00375 int i = 0;
00376
00377 gxf_write_packet_header(pb, PKT_FLT);
00378
00379 avio_wl32(pb, fields_per_flt);
00380 avio_wl32(pb, flt_entries);
00381
00382 if (gxf->flt_entries) {
00383 for (i = 0; i < flt_entries; i++)
00384 avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
00385 }
00386
00387 for (; i < 1000; i++)
00388 avio_wl32(pb, 0);
00389
00390 return updatePacketSize(pb, pos);
00391 }
00392
00393 static int gxf_write_umf_material_description(AVFormatContext *s)
00394 {
00395 GXFContext *gxf = s->priv_data;
00396 AVIOContext *pb = s->pb;
00397 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
00398 int64_t timestamp = 0;
00399 AVDictionaryEntry *t;
00400 uint32_t timecode;
00401
00402 #if FF_API_TIMESTAMP
00403 if (s->timestamp)
00404 timestamp = s->timestamp;
00405 else
00406 #endif
00407 if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
00408 timestamp = ff_iso8601_to_unix_time(t->value);
00409
00410
00411 timecode =
00412 gxf->nb_fields / (timecode_base * 3600) % 24 << 24 |
00413 gxf->nb_fields / (timecode_base * 60) % 60 << 16 |
00414 gxf->nb_fields / timecode_base % 60 << 8 |
00415 gxf->nb_fields % timecode_base;
00416
00417 avio_wl32(pb, gxf->flags);
00418 avio_wl32(pb, gxf->nb_fields);
00419 avio_wl32(pb, gxf->nb_fields);
00420 avio_wl32(pb, 0);
00421 avio_wl32(pb, gxf->nb_fields);
00422 avio_wl32(pb, 0);
00423 avio_wl32(pb, timecode);
00424 avio_wl64(pb, timestamp);
00425 avio_wl64(pb, timestamp);
00426 avio_wl16(pb, 0);
00427 avio_wl16(pb, 0);
00428 avio_wl16(pb, gxf->audio_tracks);
00429 avio_wl16(pb, 1);
00430 avio_wl16(pb, 0);
00431 avio_wl16(pb, gxf->mpeg_tracks);
00432 return 48;
00433 }
00434
00435 static int gxf_write_umf_payload(AVFormatContext *s)
00436 {
00437 GXFContext *gxf = s->priv_data;
00438 AVIOContext *pb = s->pb;
00439
00440 avio_wl32(pb, gxf->umf_length);
00441 avio_wl32(pb, 3);
00442 avio_wl32(pb, s->nb_streams+1);
00443 avio_wl32(pb, gxf->umf_track_offset);
00444 avio_wl32(pb, gxf->umf_track_size);
00445 avio_wl32(pb, s->nb_streams+1);
00446 avio_wl32(pb, gxf->umf_media_offset);
00447 avio_wl32(pb, gxf->umf_media_size);
00448 avio_wl32(pb, gxf->umf_length);
00449 avio_wl32(pb, 0);
00450 avio_wl32(pb, 0);
00451 avio_wl32(pb, 0);
00452 return 48;
00453 }
00454
00455 static int gxf_write_umf_track_description(AVFormatContext *s)
00456 {
00457 AVIOContext *pb = s->pb;
00458 GXFContext *gxf = s->priv_data;
00459 int64_t pos = avio_tell(pb);
00460 int i;
00461
00462 gxf->umf_track_offset = pos - gxf->umf_start_offset;
00463 for (i = 0; i < s->nb_streams; ++i) {
00464 GXFStreamContext *sc = s->streams[i]->priv_data;
00465 avio_wl16(pb, sc->media_info);
00466 avio_wl16(pb, 1);
00467 }
00468
00469 avio_wl16(pb, gxf->timecode_track.media_info);
00470 avio_wl16(pb, 1);
00471
00472 return avio_tell(pb) - pos;
00473 }
00474
00475 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
00476 {
00477 GXFStreamContext *sc = st->priv_data;
00478
00479 if (st->codec->pix_fmt == PIX_FMT_YUV422P)
00480 avio_wl32(pb, 2);
00481 else
00482 avio_wl32(pb, 1);
00483 avio_wl32(pb, sc->first_gop_closed == 1);
00484 avio_wl32(pb, 3);
00485 avio_wl32(pb, 1);
00486 avio_wl32(pb, sc->p_per_gop);
00487 avio_wl32(pb, sc->b_per_i_or_p);
00488 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO)
00489 avio_wl32(pb, 2);
00490 else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO)
00491 avio_wl32(pb, 1);
00492 else
00493 avio_wl32(pb, 0);
00494 avio_wl32(pb, 0);
00495 return 32;
00496 }
00497
00498 static int gxf_write_umf_media_timecode(AVIOContext *pb, GXFStreamContext *sc)
00499 {
00500 avio_wl32(pb, 1);
00501 avio_wl32(pb, 0);
00502 avio_wl32(pb, 0);
00503 avio_wl32(pb, 0);
00504 avio_wl32(pb, 0);
00505 avio_wl32(pb, 0);
00506 avio_wl32(pb, 0);
00507 avio_wl32(pb, 0);
00508 return 32;
00509 }
00510
00511 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
00512 {
00513 int i;
00514
00515 for (i = 0; i < 8; i++) {
00516 avio_wb32(pb, 0);
00517 }
00518 return 32;
00519 }
00520
00521 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
00522 {
00523 avio_wl64(pb, av_double2int(1));
00524 avio_wl64(pb, av_double2int(1));
00525 avio_wl32(pb, 0);
00526 avio_wl32(pb, 0);
00527 avio_wl32(pb, 0);
00528 avio_wl32(pb, 0);
00529 return 32;
00530 }
00531
00532 #if 0
00533 static int gxf_write_umf_media_mjpeg(AVIOContext *pb, GXFStreamContext *sc)
00534 {
00535 avio_wb64(pb, 0);
00536 avio_wb64(pb, 0);
00537 avio_wb64(pb, 0);
00538 avio_wb64(pb, 0);
00539 return 32;
00540 }
00541 #endif
00542
00543 static int gxf_write_umf_media_description(AVFormatContext *s)
00544 {
00545 GXFContext *gxf = s->priv_data;
00546 AVIOContext *pb = s->pb;
00547 int64_t pos;
00548 int i, j;
00549
00550 pos = avio_tell(pb);
00551 gxf->umf_media_offset = pos - gxf->umf_start_offset;
00552 for (i = 0; i <= s->nb_streams; ++i) {
00553 GXFStreamContext *sc;
00554 int64_t startpos, curpos;
00555
00556 if (i == s->nb_streams)
00557 sc = &gxf->timecode_track;
00558 else
00559 sc = s->streams[i]->priv_data;
00560
00561 startpos = avio_tell(pb);
00562 avio_wl16(pb, 0);
00563 avio_wl16(pb, sc->media_info);
00564 avio_wl16(pb, 0);
00565 avio_wl16(pb, 0);
00566 avio_wl32(pb, gxf->nb_fields);
00567 avio_wl32(pb, 0);
00568 avio_wl32(pb, 0);
00569 avio_wl32(pb, gxf->nb_fields);
00570 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
00571 avio_wb16(pb, sc->media_info);
00572 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
00573 avio_w8(pb, 0);
00574 avio_wl32(pb, sc->track_type);
00575 avio_wl32(pb, sc->sample_rate);
00576 avio_wl32(pb, sc->sample_size);
00577 avio_wl32(pb, 0);
00578
00579 if (sc == &gxf->timecode_track)
00580 gxf_write_umf_media_timecode(pb, sc);
00581 else {
00582 AVStream *st = s->streams[i];
00583 switch (st->codec->codec_id) {
00584 case CODEC_ID_MPEG1VIDEO:
00585 case CODEC_ID_MPEG2VIDEO:
00586 gxf_write_umf_media_mpeg(pb, st);
00587 break;
00588 case CODEC_ID_PCM_S16LE:
00589 gxf_write_umf_media_audio(pb, sc);
00590 break;
00591 case CODEC_ID_DVVIDEO:
00592 gxf_write_umf_media_dv(pb, sc);
00593 break;
00594 }
00595 }
00596
00597 curpos = avio_tell(pb);
00598 avio_seek(pb, startpos, SEEK_SET);
00599 avio_wl16(pb, curpos - startpos);
00600 avio_seek(pb, curpos, SEEK_SET);
00601 }
00602 return avio_tell(pb) - pos;
00603 }
00604
00605 static int gxf_write_umf_packet(AVFormatContext *s)
00606 {
00607 GXFContext *gxf = s->priv_data;
00608 AVIOContext *pb = s->pb;
00609 int64_t pos = avio_tell(pb);
00610
00611 gxf_write_packet_header(pb, PKT_UMF);
00612
00613
00614 avio_w8(pb, 3);
00615 avio_wb32(pb, gxf->umf_length);
00616
00617 gxf->umf_start_offset = avio_tell(pb);
00618 gxf_write_umf_payload(s);
00619 gxf_write_umf_material_description(s);
00620 gxf->umf_track_size = gxf_write_umf_track_description(s);
00621 gxf->umf_media_size = gxf_write_umf_media_description(s);
00622 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
00623 return updatePacketSize(pb, pos);
00624 }
00625
00626 static const int GXF_samples_per_frame[] = { 32768, 0 };
00627
00628 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
00629 {
00630 if (!vsc)
00631 return;
00632
00633 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
00634 sc->sample_rate = vsc->sample_rate;
00635 sc->media_info = ('T'<<8) | '0';
00636 sc->track_type = 3;
00637 sc->frame_rate_index = vsc->frame_rate_index;
00638 sc->lines_index = vsc->lines_index;
00639 sc->sample_size = 16;
00640 sc->fields = vsc->fields;
00641 }
00642
00643 static int gxf_write_header(AVFormatContext *s)
00644 {
00645 AVIOContext *pb = s->pb;
00646 GXFContext *gxf = s->priv_data;
00647 GXFStreamContext *vsc = NULL;
00648 uint8_t tracks[255] = {0};
00649 int i, media_info = 0;
00650
00651 if (!pb->seekable) {
00652 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome");
00653 return -1;
00654 }
00655
00656 gxf->flags |= 0x00080000;
00657 for (i = 0; i < s->nb_streams; ++i) {
00658 AVStream *st = s->streams[i];
00659 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
00660 if (!sc)
00661 return AVERROR(ENOMEM);
00662 st->priv_data = sc;
00663
00664 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
00665 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00666 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
00667 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
00668 return -1;
00669 }
00670 if (st->codec->sample_rate != 48000) {
00671 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
00672 return -1;
00673 }
00674 if (st->codec->channels != 1) {
00675 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
00676 return -1;
00677 }
00678 sc->track_type = 2;
00679 sc->sample_rate = st->codec->sample_rate;
00680 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
00681 sc->sample_size = 16;
00682 sc->frame_rate_index = -2;
00683 sc->lines_index = -2;
00684 sc->fields = -2;
00685 gxf->audio_tracks++;
00686 gxf->flags |= 0x04000000;
00687 media_info = 'A';
00688 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00689 if (i != 0) {
00690 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
00691 return -1;
00692 }
00693
00694 if (st->codec->height == 480 || st->codec->height == 512) {
00695 sc->frame_rate_index = 5;
00696 sc->sample_rate = 60;
00697 gxf->flags |= 0x00000080;
00698 gxf->time_base = (AVRational){ 1001, 60000 };
00699 } else if (st->codec->height == 576 || st->codec->height == 608) {
00700 sc->frame_rate_index = 6;
00701 sc->media_type++;
00702 sc->sample_rate = 50;
00703 gxf->flags |= 0x00000040;
00704 gxf->time_base = (AVRational){ 1, 50 };
00705 } else {
00706 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
00707 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
00708 return -1;
00709 }
00710 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
00711 if (gxf_find_lines_index(st) < 0)
00712 sc->lines_index = -1;
00713 sc->sample_size = st->codec->bit_rate;
00714 sc->fields = 2;
00715
00716 vsc = sc;
00717
00718 switch (st->codec->codec_id) {
00719 case CODEC_ID_MJPEG:
00720 sc->track_type = 1;
00721 gxf->flags |= 0x00004000;
00722 media_info = 'J';
00723 break;
00724 case CODEC_ID_MPEG1VIDEO:
00725 sc->track_type = 9;
00726 gxf->mpeg_tracks++;
00727 media_info = 'L';
00728 break;
00729 case CODEC_ID_MPEG2VIDEO:
00730 sc->first_gop_closed = -1;
00731 sc->track_type = 4;
00732 gxf->mpeg_tracks++;
00733 gxf->flags |= 0x00008000;
00734 media_info = 'M';
00735 break;
00736 case CODEC_ID_DVVIDEO:
00737 if (st->codec->pix_fmt == PIX_FMT_YUV422P) {
00738 sc->media_type += 2;
00739 sc->track_type = 6;
00740 gxf->flags |= 0x00002000;
00741 media_info = 'E';
00742 } else {
00743 sc->track_type = 5;
00744 gxf->flags |= 0x00001000;
00745 media_info = 'D';
00746 }
00747 break;
00748 default:
00749 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
00750 return -1;
00751 }
00752 }
00753
00754 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
00755 sc->order = s->nb_streams - st->index;
00756 }
00757
00758 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
00759 return -1;
00760
00761 gxf_init_timecode_track(&gxf->timecode_track, vsc);
00762 gxf->flags |= 0x200000;
00763
00764 gxf_write_map_packet(s, 0);
00765 gxf_write_flt_packet(s);
00766 gxf_write_umf_packet(s);
00767
00768 gxf->packet_count = 3;
00769
00770 avio_flush(pb);
00771 return 0;
00772 }
00773
00774 static int gxf_write_eos_packet(AVIOContext *pb)
00775 {
00776 int64_t pos = avio_tell(pb);
00777
00778 gxf_write_packet_header(pb, PKT_EOS);
00779 return updatePacketSize(pb, pos);
00780 }
00781
00782 static int gxf_write_trailer(AVFormatContext *s)
00783 {
00784 GXFContext *gxf = s->priv_data;
00785 AVIOContext *pb = s->pb;
00786 int64_t end;
00787 int i;
00788
00789 ff_audio_interleave_close(s);
00790
00791 gxf_write_eos_packet(pb);
00792 end = avio_tell(pb);
00793 avio_seek(pb, 0, SEEK_SET);
00794
00795 gxf_write_map_packet(s, 1);
00796 gxf_write_flt_packet(s);
00797 gxf_write_umf_packet(s);
00798 avio_flush(pb);
00799
00800 for (i = 1; i < gxf->map_offsets_nb; i++) {
00801 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
00802 gxf_write_map_packet(s, 1);
00803 avio_flush(pb);
00804 }
00805
00806 avio_seek(pb, end, SEEK_SET);
00807
00808 av_freep(&gxf->flt_entries);
00809 av_freep(&gxf->map_offsets);
00810
00811 return 0;
00812 }
00813
00814 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
00815 {
00816 uint32_t c=-1;
00817 int i;
00818 for(i=0; i<size-4 && c!=0x100; i++){
00819 c = (c<<8) + buf[i];
00820 if(c == 0x1B8 && sc->first_gop_closed == -1)
00821 sc->first_gop_closed= (buf[i+4]>>6)&1;
00822 }
00823 return (buf[i+1]>>3)&7;
00824 }
00825
00826 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
00827 {
00828 GXFContext *gxf = s->priv_data;
00829 AVIOContext *pb = s->pb;
00830 AVStream *st = s->streams[pkt->stream_index];
00831 GXFStreamContext *sc = st->priv_data;
00832 unsigned field_nb;
00833
00834
00835
00836 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00837 field_nb = gxf->nb_fields;
00838 } else {
00839 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
00840 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
00841 }
00842
00843 avio_w8(pb, sc->media_type);
00844 avio_w8(pb, st->index);
00845 avio_wb32(pb, field_nb);
00846 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00847 avio_wb16(pb, 0);
00848 avio_wb16(pb, size / 2);
00849 } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
00850 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
00851 if (frame_type == AV_PICTURE_TYPE_I) {
00852 avio_w8(pb, 0x0d);
00853 sc->iframes++;
00854 } else if (frame_type == AV_PICTURE_TYPE_B) {
00855 avio_w8(pb, 0x0f);
00856 sc->bframes++;
00857 } else {
00858 avio_w8(pb, 0x0e);
00859 sc->pframes++;
00860 }
00861 avio_wb24(pb, size);
00862 } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {
00863 avio_w8(pb, size / 4096);
00864 avio_wb24(pb, 0);
00865 } else
00866 avio_wb32(pb, size);
00867 avio_wb32(pb, field_nb);
00868 avio_w8(pb, 1);
00869 avio_w8(pb, 0);
00870 return 16;
00871 }
00872
00873 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
00874 {
00875 GXFContext *gxf = s->priv_data;
00876 AVIOContext *pb = s->pb;
00877 AVStream *st = s->streams[pkt->stream_index];
00878 int64_t pos = avio_tell(pb);
00879 int padding = 0;
00880 int packet_start_offset = avio_tell(pb) / 1024;
00881
00882 gxf_write_packet_header(pb, PKT_MEDIA);
00883 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4)
00884 padding = 4 - pkt->size % 4;
00885 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
00886 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
00887 gxf_write_media_preamble(s, pkt, pkt->size + padding);
00888 avio_write(pb, pkt->data, pkt->size);
00889 gxf_write_padding(pb, padding);
00890
00891 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00892 if (!(gxf->flt_entries_nb % 500)) {
00893 gxf->flt_entries = av_realloc(gxf->flt_entries,
00894 (gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries));
00895 if (!gxf->flt_entries) {
00896 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
00897 return -1;
00898 }
00899 }
00900 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
00901 gxf->nb_fields += 2;
00902 }
00903
00904 updatePacketSize(pb, pos);
00905
00906 gxf->packet_count++;
00907 if (gxf->packet_count == 100) {
00908 gxf_write_map_packet(s, 0);
00909 gxf->packet_count = 0;
00910 }
00911
00912 avio_flush(pb);
00913
00914 return 0;
00915 }
00916
00917 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
00918 {
00919 GXFContext *gxf = s->priv_data;
00920 AVPacket *pkt[2] = { cur, next };
00921 int i, field_nb[2];
00922 GXFStreamContext *sc[2];
00923
00924 for (i = 0; i < 2; i++) {
00925 AVStream *st = s->streams[pkt[i]->stream_index];
00926 sc[i] = st->priv_data;
00927 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00928 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
00929 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
00930 field_nb[i] &= ~1;
00931 } else
00932 field_nb[i] = pkt[i]->dts;
00933 }
00934
00935 return field_nb[1] > field_nb[0] ||
00936 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
00937 }
00938
00939 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
00940 {
00941 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
00942 pkt->duration = 2;
00943 return ff_audio_rechunk_interleave(s, out, pkt, flush,
00944 av_interleave_packet_per_dts, gxf_compare_field_nb);
00945 }
00946
00947 AVOutputFormat ff_gxf_muxer = {
00948 .name = "gxf",
00949 .long_name = NULL_IF_CONFIG_SMALL("GXF format"),
00950 .extensions = "gxf",
00951 .priv_data_size = sizeof(GXFContext),
00952 .audio_codec = CODEC_ID_PCM_S16LE,
00953 .video_codec = CODEC_ID_MPEG2VIDEO,
00954 .write_header = gxf_write_header,
00955 .write_packet = gxf_write_packet,
00956 .write_trailer = gxf_write_trailer,
00957 .interleave_packet = gxf_interleave_packet,
00958 };