diff options
Diffstat (limited to 'libavformat/dvenc.c')
| -rw-r--r-- | libavformat/dvenc.c | 58 |
1 files changed, 36 insertions, 22 deletions
diff --git a/libavformat/dvenc.c b/libavformat/dvenc.c index bffad44b9f..ce6568b5eb 100644 --- a/libavformat/dvenc.c +++ b/libavformat/dvenc.c @@ -11,20 +11,20 @@ * 50 Mbps (DVCPRO50) support * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <time.h> @@ -33,11 +33,15 @@ #include "avformat.h" #include "internal.h" #include "libavcodec/dvdata.h" +#include "libavcodec/timecode.h" #include "dv.h" #include "libavutil/fifo.h" #include "libavutil/mathematics.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" struct DVMuxContext { + AVClass *av_class; const DVprofile* sys; /* current DV profile, e.g.: 525/60, 625/50 */ int n_ast; /* number of stereo audio streams (up to 2) */ AVStream *ast[2]; /* stereo audio streams */ @@ -47,6 +51,7 @@ struct DVMuxContext { int has_audio; /* frame under contruction has audio */ int has_video; /* frame under contruction has video */ uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under contruction */ + struct ff_timecode tc; }; static const int dv_aaux_packs_dist[12][9] = { @@ -75,33 +80,23 @@ static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* bu struct tm tc; time_t ct; int ltc_frame; + uint32_t timecode; va_list ap; buf[0] = (uint8_t)pack_id; switch (pack_id) { case dv_timecode: - ct = (time_t)av_rescale_rnd(c->frames, c->sys->time_base.num, - c->sys->time_base.den, AV_ROUND_DOWN); - brktimegm(ct, &tc); /* * LTC drop-frame frame counter drops two frames (0 and 1) every * minute, unless it is exactly divisible by 10 */ - ltc_frame = (c->frames + 2 * ct / 60 - 2 * ct / 600) % c->sys->ltc_divisor; - buf[1] = (0 << 7) | /* color frame: 0 - unsync; 1 - sync mode */ - (1 << 6) | /* drop frame timecode: 0 - nondrop; 1 - drop */ - ((ltc_frame / 10) << 4) | /* tens of frames */ - (ltc_frame % 10); /* units of frames */ - buf[2] = (1 << 7) | /* biphase mark polarity correction: 0 - even; 1 - odd */ - ((tc.tm_sec / 10) << 4) | /* tens of seconds */ - (tc.tm_sec % 10); /* units of seconds */ - buf[3] = (1 << 7) | /* binary group flag BGF0 */ - ((tc.tm_min / 10) << 4) | /* tens of minutes */ - (tc.tm_min % 10); /* units of minutes */ - buf[4] = (1 << 7) | /* binary group flag BGF2 */ - (1 << 6) | /* binary group flag BGF1 */ - ((tc.tm_hour / 10) << 4) | /* tens of hours */ - (tc.tm_hour % 10); /* units of hours */ + ltc_frame = c->tc.start + c->frames; + if (c->tc.drop) + ltc_frame = ff_framenum_to_drop_timecode(ltc_frame); + timecode = ff_framenum_to_smtpe_timecode(ltc_frame, c->sys->ltc_divisor, + c->tc.drop); + timecode |= 1<<23 | 1<<15 | 1<<7 | 1<<6; // biphase and binary group flags + AV_WB32(buf + 1, timecode); break; case dv_audio_source: /* AAUX source pack */ va_start(ap, buf); @@ -371,6 +366,8 @@ static void dv_delete_mux(DVMuxContext *c) static int dv_write_header(AVFormatContext *s) { + DVMuxContext *dvc = s->priv_data; + if (!dv_init_mux(s)) { av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n" "Make sure that you supply exactly two streams:\n" @@ -378,6 +375,12 @@ static int dv_write_header(AVFormatContext *s) " (50Mbps allows an optional second audio stream)\n"); return -1; } + if (dvc->tc.str) { + dvc->tc.rate.num = dvc->sys->time_base.den; + dvc->tc.rate.den = dvc->sys->time_base.num; + if (ff_init_smtpe_timecode(s, &dvc->tc) < 0) + return -1; + } return 0; } @@ -407,6 +410,16 @@ static int dv_write_trailer(struct AVFormatContext *s) return 0; } +static const AVClass class = { + .class_name = "dv", + .item_name = av_default_item_name, + .version = LIBAVUTIL_VERSION_INT, + .option = (const AVOption[]){ + {TIMECODE_OPT(DVMuxContext, AV_OPT_FLAG_ENCODING_PARAM)}, + {NULL}, + }, +}; + AVOutputFormat ff_dv_muxer = { .name = "dv", .long_name = NULL_IF_CONFIG_SMALL("DV video format"), @@ -417,4 +430,5 @@ AVOutputFormat ff_dv_muxer = { .write_header = dv_write_header, .write_packet = dv_write_packet, .write_trailer = dv_write_trailer, + .priv_class = &class, }; |