diff options
Diffstat (limited to 'libavformat/dvenc.c')
| -rw-r--r-- | libavformat/dvenc.c | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/libavformat/dvenc.c b/libavformat/dvenc.c index 848ca77ac0..880caeab72 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> @@ -37,8 +37,12 @@ #include "dv.h" #include "libavutil/fifo.h" #include "libavutil/mathematics.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" +#include "libavutil/timecode.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 */ @@ -48,6 +52,7 @@ 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 */ + AVTimecode tc; /* timecode context */ }; static const int dv_aaux_packs_dist[12][9] = { @@ -75,34 +80,15 @@ 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); - ff_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 */ + timecode = av_timecode_get_smpte_from_framenum(&c->tc, c->frames); + 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); @@ -367,6 +353,10 @@ static void dv_delete_mux(DVMuxContext *c) static int dv_write_header(AVFormatContext *s) { + AVRational rate; + DVMuxContext *dvc = s->priv_data; + AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0); + 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" @@ -374,7 +364,19 @@ static int dv_write_header(AVFormatContext *s) " (50Mbps allows an optional second audio stream)\n"); return -1; } - return 0; + rate.num = dvc->sys->ltc_divisor; + rate.den = 1; + if (!tcr) { // no global timecode, look into the streams + int i; + for (i = 0; i < s->nb_streams; i++) { + tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0); + if (tcr) + break; + } + } + if (tcr) + return av_timecode_init_from_string(&dvc->tc, rate, tcr->value, s); + return av_timecode_init(&dvc->tc, rate, 0, 0, s); } static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt) |