#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 */
AVFifoBuffer *audio_data[2]; /* FIFO for storing excessive amounts of PCM */
int frames; /* current frame number */
- time_t start_time; /* recording start time */
+ int64_t start_time; /* recording start time */
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] = {
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);
if (of*2 >= size)
continue;
- frame_ptr[d] = av_fifo_peek(c->audio_data[channel], of*2+1); // FIXME: maybe we have to admit
- frame_ptr[d+1] = av_fifo_peek(c->audio_data[channel], of*2); // that DV is a big-endian PCM
+ frame_ptr[d] = *av_fifo_peek2(c->audio_data[channel], of*2+1); // FIXME: maybe we have to admit
+ frame_ptr[d+1] = *av_fifo_peek2(c->audio_data[channel], of*2); // that DV is a big-endian PCM
}
frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
}
{
DVMuxContext *c = s->priv_data;
AVStream *vst = NULL;
+ AVDictionaryEntry *t;
int i;
/* we support at most 1 video and 2 audio streams */
c->frames = 0;
c->has_audio = 0;
c->has_video = 0;
- c->start_time = (time_t)s->timestamp;
+#if FF_API_TIMESTAMP
+ if (s->timestamp)
+ c->start_time = s->timestamp;
+ else
+#endif
+ if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
+ c->start_time = ff_iso8601_to_unix_time(t->value);
for (i=0; i < c->n_ast; i++) {
if (c->ast[i] && !(c->audio_data[i]=av_fifo_alloc(100*AVCODEC_MAX_AUDIO_FRAME_SIZE))) {
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"
" (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;
}
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 = {
- "dv",
- NULL_IF_CONFIG_SMALL("DV video format"),
- NULL,
- "dv",
- sizeof(DVMuxContext),
- CODEC_ID_PCM_S16LE,
- CODEC_ID_DVVIDEO,
- dv_write_header,
- dv_write_packet,
- dv_write_trailer,
+ .name = "dv",
+ .long_name = NULL_IF_CONFIG_SMALL("DV video format"),
+ .extensions = "dv",
+ .priv_data_size = sizeof(DVMuxContext),
+ .audio_codec = CODEC_ID_PCM_S16LE,
+ .video_codec = CODEC_ID_DVVIDEO,
+ .write_header = dv_write_header,
+ .write_packet = dv_write_packet,
+ .write_trailer = dv_write_trailer,
+ .priv_class = &class,
};
projects / ffmpeg / blobdiff