2006-09-15 19:14:24 +00:00
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/*
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* General DV muxer/demuxer
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* Copyright (c) 2003 Roman Shaposhnik
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*
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* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
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* of DV technical info.
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*
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* Raw DV format
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2009-01-19 15:46:40 +00:00
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* Copyright (c) 2002 Fabrice Bellard
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2006-09-15 19:14:24 +00:00
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*
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* 50 Mbps (DVCPRO50) support
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* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
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*
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2006-10-07 15:30:46 +00:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2006-09-15 19:14:24 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 15:30:46 +00:00
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* version 2.1 of the License, or (at your option) any later version.
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2006-09-15 19:14:24 +00:00
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*
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2006-10-07 15:30:46 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2006-09-15 19:14:24 +00:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2006-10-07 15:30:46 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-09-15 19:14:24 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <time.h>
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2007-01-15 07:41:28 +00:00
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#include <stdarg.h>
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2010-04-20 14:41:55 +00:00
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2006-09-15 19:14:24 +00:00
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#include "avformat.h"
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2010-04-20 14:41:55 +00:00
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#include "internal.h"
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2012-04-18 15:55:49 +00:00
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#include "libavcodec/dv_profile.h"
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2013-11-10 17:05:39 +00:00
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#include "libavcodec/dv.h"
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2006-09-15 19:14:24 +00:00
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#include "dv.h"
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2008-05-09 11:56:36 +00:00
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#include "libavutil/fifo.h"
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2011-06-04 11:58:23 +00:00
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#include "libavutil/mathematics.h"
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2011-07-06 13:08:28 +00:00
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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2012-01-16 12:43:42 +00:00
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#include "libavutil/timecode.h"
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2006-09-15 19:14:24 +00:00
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2012-08-15 07:11:31 +00:00
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#define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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2006-09-15 19:14:24 +00:00
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struct DVMuxContext {
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2011-07-06 13:08:28 +00:00
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AVClass *av_class;
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2008-10-24 21:37:06 +00:00
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const DVprofile* sys; /* current DV profile, e.g.: 525/60, 625/50 */
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int n_ast; /* number of stereo audio streams (up to 2) */
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AVStream *ast[2]; /* stereo audio streams */
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2009-03-08 14:16:55 +00:00
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AVFifoBuffer *audio_data[2]; /* FIFO for storing excessive amounts of PCM */
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2008-10-24 21:37:06 +00:00
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int frames; /* current frame number */
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2011-07-07 09:25:03 +00:00
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int64_t start_time; /* recording start time */
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2012-12-19 17:48:21 +00:00
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int has_audio; /* frame under construction has audio */
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int has_video; /* frame under construction has video */
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uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under construction */
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2012-01-16 12:43:42 +00:00
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AVTimecode tc; /* timecode context */
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2006-09-15 19:14:24 +00:00
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};
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static const int dv_aaux_packs_dist[12][9] = {
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{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
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{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
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{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
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{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
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{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
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{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
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{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
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{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
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{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
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{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
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{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
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{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
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};
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static int dv_audio_frame_size(const DVprofile* sys, int frame)
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{
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2008-10-24 21:41:27 +00:00
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return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist) /
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2006-09-15 19:14:24 +00:00
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sizeof(sys->audio_samples_dist[0]))];
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}
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2007-01-15 07:41:28 +00:00
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static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, ...)
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2006-09-15 19:14:24 +00:00
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{
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struct tm tc;
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time_t ct;
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2011-07-06 13:08:28 +00:00
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uint32_t timecode;
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2007-01-15 07:41:28 +00:00
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va_list ap;
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2006-09-15 19:14:24 +00:00
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buf[0] = (uint8_t)pack_id;
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switch (pack_id) {
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case dv_timecode:
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2012-01-16 12:43:42 +00:00
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timecode = av_timecode_get_smpte_from_framenum(&c->tc, c->frames);
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2011-07-06 13:08:28 +00:00
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timecode |= 1<<23 | 1<<15 | 1<<7 | 1<<6; // biphase and binary group flags
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AV_WB32(buf + 1, timecode);
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2007-06-24 07:45:19 +00:00
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break;
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2006-09-15 19:14:24 +00:00
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case dv_audio_source: /* AAUX source pack */
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2007-06-24 07:45:19 +00:00
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va_start(ap, buf);
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buf[1] = (1 << 7) | /* locked mode -- SMPTE only supports locked mode */
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(1 << 6) | /* reserved -- always 1 */
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(dv_audio_frame_size(c->sys, c->frames) -
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c->sys->audio_min_samples[0]);
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/* # of samples */
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buf[2] = (0 << 7) | /* multi-stereo */
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(0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
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(0 << 4) | /* pair bit: 0 -- one pair of channels */
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!!va_arg(ap, int); /* audio mode */
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buf[3] = (1 << 7) | /* res */
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(1 << 6) | /* multi-language flag */
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(c->sys->dsf << 5) | /* system: 60fields/50fields */
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(c->sys->n_difchan & 2); /* definition: 0 -- 25Mbps, 2 -- 50Mbps */
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buf[4] = (1 << 7) | /* emphasis: 1 -- off */
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(0 << 6) | /* emphasis time constant: 0 -- reserved */
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2008-10-02 16:28:58 +00:00
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(0 << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
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2007-06-24 07:45:19 +00:00
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0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
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va_end(ap);
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break;
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2006-09-15 19:14:24 +00:00
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case dv_audio_control:
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2007-06-24 07:45:19 +00:00
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buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
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(1 << 4) | /* input source: 1 -- digital input */
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(3 << 2) | /* compression: 3 -- no information */
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0; /* misc. info/SMPTE emphasis off */
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buf[2] = (1 << 7) | /* recording start point: 1 -- no */
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(1 << 6) | /* recording end point: 1 -- no */
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(1 << 3) | /* recording mode: 1 -- original */
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7;
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buf[3] = (1 << 7) | /* direction: 1 -- forward */
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2012-10-06 10:10:34 +00:00
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(c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0x20 : /* speed */
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2008-10-24 21:41:27 +00:00
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c->sys->ltc_divisor * 4);
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2007-06-24 07:45:19 +00:00
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buf[4] = (1 << 7) | /* reserved -- always 1 */
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0x7f; /* genre category */
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break;
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2006-09-15 19:14:24 +00:00
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case dv_audio_recdate:
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case dv_video_recdate: /* VAUX recording date */
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2008-10-07 16:59:18 +00:00
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ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
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2008-10-24 21:41:27 +00:00
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c->sys->time_base.den, AV_ROUND_DOWN);
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2012-02-15 09:28:39 +00:00
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ff_brktimegm(ct, &tc);
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2007-06-24 07:45:19 +00:00
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buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
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/* 0xff is very likely to be "unknown" */
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buf[2] = (3 << 6) | /* reserved -- always 1 */
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((tc.tm_mday / 10) << 4) | /* Tens of day */
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(tc.tm_mday % 10); /* Units of day */
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buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
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((tc.tm_mon / 10) << 4) | /* Tens of month */
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(tc.tm_mon % 10); /* Units of month */
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buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
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(tc.tm_year % 10); /* Units of year */
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break;
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2006-09-15 19:14:24 +00:00
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case dv_audio_rectime: /* AAUX recording time */
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case dv_video_rectime: /* VAUX recording time */
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2008-10-07 16:59:18 +00:00
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ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
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c->sys->time_base.den, AV_ROUND_DOWN);
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2012-02-15 09:28:39 +00:00
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ff_brktimegm(ct, &tc);
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2007-06-24 07:45:19 +00:00
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buf[1] = (3 << 6) | /* reserved -- always 1 */
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0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
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buf[2] = (1 << 7) | /* reserved -- always 1 */
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((tc.tm_sec / 10) << 4) | /* Tens of seconds */
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(tc.tm_sec % 10); /* Units of seconds */
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buf[3] = (1 << 7) | /* reserved -- always 1 */
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((tc.tm_min / 10) << 4) | /* Tens of minutes */
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(tc.tm_min % 10); /* Units of minutes */
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buf[4] = (3 << 6) | /* reserved -- always 1 */
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((tc.tm_hour / 10) << 4) | /* Tens of hours */
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(tc.tm_hour % 10); /* Units of hours */
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break;
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2006-09-15 19:14:24 +00:00
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default:
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2007-06-24 07:45:19 +00:00
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buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
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2006-09-15 19:14:24 +00:00
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}
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return 5;
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}
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static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
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{
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int i, j, d, of, size;
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size = 4 * dv_audio_frame_size(c->sys, c->frames);
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frame_ptr += channel * c->sys->difseg_size * 150 * 80;
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for (i = 0; i < c->sys->difseg_size; i++) {
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2007-06-24 07:45:19 +00:00
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frame_ptr += 6 * 80; /* skip DIF segment header */
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for (j = 0; j < 9; j++) {
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dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3], i >= c->sys->difseg_size/2);
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for (d = 8; d < 80; d+=2) {
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of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
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if (of*2 >= size)
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continue;
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2006-09-15 19:14:24 +00:00
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2011-08-13 16:26:01 +00:00
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frame_ptr[d] = *av_fifo_peek2(c->audio_data[channel], of*2+1); // FIXME: maybe we have to admit
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frame_ptr[d+1] = *av_fifo_peek2(c->audio_data[channel], of*2); // that DV is a big-endian PCM
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2007-06-24 07:45:19 +00:00
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}
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frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
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}
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2006-09-15 19:14:24 +00:00
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}
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}
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static void dv_inject_metadata(DVMuxContext *c, uint8_t* frame)
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{
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int j, k;
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uint8_t* buf;
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for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80) {
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/* DV subcode: 2nd and 3d DIFs */
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for (j = 80; j < 80 * 3; j += 80) {
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for (k = 6; k < 6 * 8; k += 8)
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dv_write_pack(dv_timecode, c, &buf[j+k]);
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if (((long)(buf-frame)/(c->sys->frame_size/(c->sys->difseg_size*c->sys->n_difchan))%c->sys->difseg_size) > 5) { /* FIXME: is this really needed ? */
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dv_write_pack(dv_video_recdate, c, &buf[j+14]);
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dv_write_pack(dv_video_rectime, c, &buf[j+22]);
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dv_write_pack(dv_video_recdate, c, &buf[j+38]);
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dv_write_pack(dv_video_rectime, c, &buf[j+46]);
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}
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}
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/* DV VAUX: 4th, 5th and 6th 3DIFs */
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for (j = 80*3 + 3; j < 80*6; j += 80) {
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dv_write_pack(dv_video_recdate, c, &buf[j+5*2]);
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dv_write_pack(dv_video_rectime, c, &buf[j+5*3]);
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dv_write_pack(dv_video_recdate, c, &buf[j+5*11]);
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dv_write_pack(dv_video_rectime, c, &buf[j+5*12]);
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}
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}
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}
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/*
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* The following 3 functions constitute our interface to the world
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*/
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2011-01-24 23:36:16 +00:00
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static int dv_assemble_frame(DVMuxContext *c, AVStream* st,
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uint8_t* data, int data_size, uint8_t** frame)
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2006-09-15 19:14:24 +00:00
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{
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int i, reqasize;
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*frame = &c->frame_buf[0];
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reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
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switch (st->codec->codec_type) {
|
2010-03-30 23:30:55 +00:00
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case AVMEDIA_TYPE_VIDEO:
|
2007-06-24 07:45:19 +00:00
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/* FIXME: we have to have more sensible approach than this one */
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if (c->has_video)
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av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
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2006-09-15 19:14:24 +00:00
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2007-06-24 07:45:19 +00:00
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memcpy(*frame, data, c->sys->frame_size);
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c->has_video = 1;
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break;
|
2010-03-30 23:30:55 +00:00
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case AVMEDIA_TYPE_AUDIO:
|
2007-06-24 07:45:19 +00:00
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for (i = 0; i < c->n_ast && st != c->ast[i]; i++);
|
2006-09-15 19:14:24 +00:00
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/* FIXME: we have to have more sensible approach than this one */
|
2012-08-15 07:11:31 +00:00
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if (av_fifo_size(c->audio_data[i]) + data_size >= 100*MAX_AUDIO_FRAME_SIZE)
|
2007-06-24 07:45:19 +00:00
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av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
|
2009-03-08 14:16:55 +00:00
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av_fifo_generic_write(c->audio_data[i], data, data_size, NULL);
|
2006-09-15 19:14:24 +00:00
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2008-07-24 17:09:28 +00:00
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|
|
/* Let us see if we've got enough audio for one DV frame. */
|
2009-03-08 14:16:55 +00:00
|
|
|
c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
|
2006-09-15 19:14:24 +00:00
|
|
|
|
2007-06-24 07:45:19 +00:00
|
|
|
break;
|
2006-09-15 19:14:24 +00:00
|
|
|
default:
|
2007-06-24 07:45:19 +00:00
|
|
|
break;
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
|
2008-07-24 17:09:28 +00:00
|
|
|
/* Let us see if we have enough data to construct one DV frame. */
|
2008-10-24 21:41:27 +00:00
|
|
|
if (c->has_video == 1 && c->has_audio + 1 == 1 << c->n_ast) {
|
2006-09-15 19:14:24 +00:00
|
|
|
dv_inject_metadata(c, *frame);
|
2007-05-16 02:02:22 +00:00
|
|
|
c->has_audio = 0;
|
2008-10-24 21:41:27 +00:00
|
|
|
for (i=0; i < c->n_ast; i++) {
|
2007-06-24 07:45:19 +00:00
|
|
|
dv_inject_audio(c, i, *frame);
|
2009-03-08 14:16:55 +00:00
|
|
|
av_fifo_drain(c->audio_data[i], reqasize);
|
|
|
|
c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
c->has_video = 0;
|
2007-05-16 02:02:22 +00:00
|
|
|
|
2006-09-15 19:14:24 +00:00
|
|
|
c->frames++;
|
|
|
|
|
|
|
|
return c->sys->frame_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-24 23:36:16 +00:00
|
|
|
static DVMuxContext* dv_init_mux(AVFormatContext* s)
|
2006-09-15 19:14:24 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
DVMuxContext *c = s->priv_data;
|
2006-09-15 19:14:24 +00:00
|
|
|
AVStream *vst = NULL;
|
2011-07-07 09:25:03 +00:00
|
|
|
AVDictionaryEntry *t;
|
2006-09-15 19:14:24 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
/* we support at most 1 video and 2 audio streams */
|
|
|
|
if (s->nb_streams > 3)
|
|
|
|
return NULL;
|
|
|
|
|
2008-10-24 21:41:27 +00:00
|
|
|
c->n_ast = 0;
|
2006-09-15 19:14:24 +00:00
|
|
|
c->ast[0] = c->ast[1] = NULL;
|
|
|
|
|
|
|
|
/* We have to sort out where audio and where video stream is */
|
|
|
|
for (i=0; i<s->nb_streams; i++) {
|
2007-06-24 07:45:19 +00:00
|
|
|
switch (s->streams[i]->codec->codec_type) {
|
2010-03-30 23:30:55 +00:00
|
|
|
case AVMEDIA_TYPE_VIDEO:
|
2007-06-24 07:45:19 +00:00
|
|
|
if (vst) return NULL;
|
|
|
|
vst = s->streams[i];
|
|
|
|
break;
|
2010-03-30 23:30:55 +00:00
|
|
|
case AVMEDIA_TYPE_AUDIO:
|
2007-06-24 07:45:19 +00:00
|
|
|
if (c->n_ast > 1) return NULL;
|
|
|
|
c->ast[c->n_ast++] = s->streams[i];
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
goto bail_out;
|
|
|
|
}
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Some checks -- DV format is very picky about its incoming streams */
|
2012-08-05 09:11:04 +00:00
|
|
|
if (!vst || vst->codec->codec_id != AV_CODEC_ID_DVVIDEO)
|
2006-09-15 19:14:24 +00:00
|
|
|
goto bail_out;
|
|
|
|
for (i=0; i<c->n_ast; i++) {
|
2012-08-05 09:11:04 +00:00
|
|
|
if (c->ast[i] && (c->ast[i]->codec->codec_id != AV_CODEC_ID_PCM_S16LE ||
|
2006-09-15 19:14:24 +00:00
|
|
|
c->ast[i]->codec->sample_rate != 48000 ||
|
2008-10-24 21:41:27 +00:00
|
|
|
c->ast[i]->codec->channels != 2))
|
2006-09-15 19:14:24 +00:00
|
|
|
goto bail_out;
|
|
|
|
}
|
2011-10-17 07:28:53 +00:00
|
|
|
c->sys = avpriv_dv_codec_profile(vst->codec);
|
2006-09-15 19:14:24 +00:00
|
|
|
if (!c->sys)
|
|
|
|
goto bail_out;
|
|
|
|
|
2008-10-24 21:41:27 +00:00
|
|
|
if ((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
|
2006-09-15 19:14:24 +00:00
|
|
|
/* only 1 stereo pair is allowed in 25Mbps mode */
|
|
|
|
goto bail_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Ok, everything seems to be in working order */
|
2008-10-24 21:41:27 +00:00
|
|
|
c->frames = 0;
|
|
|
|
c->has_audio = 0;
|
|
|
|
c->has_video = 0;
|
2011-07-13 09:45:17 +00:00
|
|
|
if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
|
|
|
|
c->start_time = ff_iso8601_to_unix_time(t->value);
|
2006-09-15 19:14:24 +00:00
|
|
|
|
2008-10-24 21:41:27 +00:00
|
|
|
for (i=0; i < c->n_ast; i++) {
|
2012-08-15 07:11:31 +00:00
|
|
|
if (c->ast[i] && !(c->audio_data[i]=av_fifo_alloc(100*MAX_AUDIO_FRAME_SIZE))) {
|
2008-10-24 21:41:27 +00:00
|
|
|
while (i > 0) {
|
2006-09-15 19:14:24 +00:00
|
|
|
i--;
|
2014-05-06 19:48:14 +00:00
|
|
|
av_fifo_freep(&c->audio_data[i]);
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
goto bail_out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return c;
|
|
|
|
|
|
|
|
bail_out:
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2011-01-24 23:36:16 +00:00
|
|
|
static void dv_delete_mux(DVMuxContext *c)
|
2006-09-15 19:14:24 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
for (i=0; i < c->n_ast; i++)
|
2014-05-06 19:48:14 +00:00
|
|
|
av_fifo_freep(&c->audio_data[i]);
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int dv_write_header(AVFormatContext *s)
|
|
|
|
{
|
2012-01-16 12:43:42 +00:00
|
|
|
AVRational rate;
|
2011-07-06 13:08:28 +00:00
|
|
|
DVMuxContext *dvc = s->priv_data;
|
2012-05-30 08:26:53 +00:00
|
|
|
AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
|
2011-07-06 13:08:28 +00:00
|
|
|
|
2006-11-08 18:57:02 +00:00
|
|
|
if (!dv_init_mux(s)) {
|
2006-09-15 19:14:24 +00:00
|
|
|
av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n"
|
|
|
|
"Make sure that you supply exactly two streams:\n"
|
2008-10-02 16:28:58 +00:00
|
|
|
" video: 25fps or 29.97fps, audio: 2ch/48kHz/PCM\n"
|
2006-09-15 19:14:24 +00:00
|
|
|
" (50Mbps allows an optional second audio stream)\n");
|
|
|
|
return -1;
|
|
|
|
}
|
2012-01-16 12:43:42 +00:00
|
|
|
rate.num = dvc->sys->ltc_divisor;
|
|
|
|
rate.den = 1;
|
2012-05-30 08:26:53 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
2013-02-05 21:57:35 +00:00
|
|
|
if (tcr && av_timecode_init_from_string(&dvc->tc, rate, tcr->value, s) >= 0)
|
|
|
|
return 0;
|
2012-01-16 12:43:42 +00:00
|
|
|
return av_timecode_init(&dvc->tc, rate, 0, 0, s);
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
|
|
|
|
{
|
|
|
|
uint8_t* frame;
|
|
|
|
int fsize;
|
|
|
|
|
2007-04-08 20:24:16 +00:00
|
|
|
fsize = dv_assemble_frame(s->priv_data, s->streams[pkt->stream_index],
|
2006-09-15 19:14:24 +00:00
|
|
|
pkt->data, pkt->size, &frame);
|
|
|
|
if (fsize > 0) {
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_write(s->pb, frame, fsize);
|
2006-09-15 19:14:24 +00:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We might end up with some extra A/V data without matching counterpart.
|
|
|
|
* E.g. video data without enough audio to write the complete frame.
|
|
|
|
* Currently we simply drop the last frame. I don't know whether this
|
|
|
|
* is the best strategy of all
|
|
|
|
*/
|
|
|
|
static int dv_write_trailer(struct AVFormatContext *s)
|
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
dv_delete_mux(s->priv_data);
|
2006-09-15 19:14:24 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 22:03:28 +00:00
|
|
|
AVOutputFormat ff_dv_muxer = {
|
2011-07-16 20:18:12 +00:00
|
|
|
.name = "dv",
|
2012-07-24 01:23:48 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
|
2011-07-16 20:18:12 +00:00
|
|
|
.extensions = "dv",
|
|
|
|
.priv_data_size = sizeof(DVMuxContext),
|
2012-08-05 09:11:04 +00:00
|
|
|
.audio_codec = AV_CODEC_ID_PCM_S16LE,
|
|
|
|
.video_codec = AV_CODEC_ID_DVVIDEO,
|
2011-07-16 20:18:12 +00:00
|
|
|
.write_header = dv_write_header,
|
|
|
|
.write_packet = dv_write_packet,
|
|
|
|
.write_trailer = dv_write_trailer,
|
2006-09-15 19:14:24 +00:00
|
|
|
};
|