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-rw-r--r--libavformat/dvenc.c59
1 files changed, 30 insertions, 29 deletions
diff --git a/libavformat/dvenc.c b/libavformat/dvenc.c
index a991cc6b0c..e37bd23421 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>
@@ -37,10 +37,14 @@
#include "dv.h"
#include "libavutil/fifo.h"
#include "libavutil/mathematics.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/opt.h"
+#include "libavutil/timecode.h"
#define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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 */
@@ -50,6 +54,7 @@ struct DVMuxContext {
int has_audio; /* frame under construction has audio */
int has_video; /* frame under construction has video */
uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under construction */
+ AVTimecode tc; /* timecode context */
};
static const int dv_aaux_packs_dist[12][9] = {
@@ -77,34 +82,15 @@ 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);
@@ -369,6 +355,10 @@ 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"
@@ -376,7 +366,19 @@ 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 && av_timecode_init_from_string(&dvc->tc, rate, tcr->value, s) >= 0)
+ return 0;
+ return av_timecode_init(&dvc->tc, rate, 0, 0, s);
}
static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
@@ -388,7 +390,6 @@ static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
pkt->data, pkt->size, &frame);
if (fsize > 0) {
avio_write(s->pb, frame, fsize);
- avio_flush(s->pb);
}
return 0;
}