mirror of https://github.com/FFmpeg/FFmpeg.git
Biurrun). Originally committed as revision 6272 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Panagiotis Issaris
19 years ago
parent
bcce83e693
commit
d4fc91b449
3 changed files with 415 additions and 379 deletions
@ -0,0 +1,413 @@ |
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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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* Copyright (c) 2002 Fabrice Bellard. |
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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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* This library is free software; you can redistribute it and/or |
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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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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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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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* License along with this library; if not, write to the Free Software |
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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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#include "avformat.h" |
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#include "dvdata.h" |
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#include "dv.h" |
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struct DVMuxContext { |
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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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FifoBuffer audio_data[2]; /* Fifo for storing excessive amounts of PCM */ |
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int frames; /* Number of a current frame */ |
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time_t start_time; /* Start time of recording */ |
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int has_audio; /* frame under contruction has audio */ |
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int has_video; /* frame under contruction has video */ |
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uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under contruction */ |
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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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return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist)/ |
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sizeof(sys->audio_samples_dist[0]))]; |
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} |
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static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf) |
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{ |
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struct tm tc; |
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time_t ct; |
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int ltc_frame; |
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/* Its hard to tell what SMPTE requires w.r.t. APT, but Quicktime needs it.
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* We set it based on pix_fmt value but it really should be per DV profile */ |
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int apt = (c->sys->pix_fmt == PIX_FMT_YUV422P ? 1 : 0); |
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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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ct = (time_t)(c->frames / ((float)c->sys->frame_rate / |
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(float)c->sys->frame_rate_base)); |
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brktimegm(ct, &tc); |
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/*
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* LTC drop-frame frame counter drops two frames (0 and 1) every |
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* minute, unless it is exactly divisible by 10 |
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*/ |
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ltc_frame = (c->frames + 2*ct/60 - 2*ct/600) % c->sys->ltc_divisor; |
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buf[1] = (0 << 7) | /* Color fame: 0 - unsync; 1 - sync mode */ |
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(1 << 6) | /* Drop frame timecode: 0 - nondrop; 1 - drop */ |
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((ltc_frame / 10) << 4) | /* Tens of frames */ |
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(ltc_frame % 10); /* Units of frames */ |
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buf[2] = (1 << 7) | /* Biphase mark polarity correction: 0 - even; 1 - odd */ |
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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) | /* Binary group flag BGF0 */ |
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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] = (1 << 7) | /* Binary group flag BGF2 */ |
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(1 << 6) | /* Binary group flag BGF1 */ |
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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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case dv_audio_source: /* AAUX source pack */ |
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buf[1] = (0 << 7) | /* 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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0; /* 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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(apt << 1);/* 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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(0 << 3) | /* frequency: 0 -- 48Khz, 1 -- 44,1Khz, 2 -- 32Khz */ |
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0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */ |
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break; |
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case dv_audio_control: |
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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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0x20; /* speed */ |
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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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case dv_audio_recdate: |
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case dv_video_recdate: /* VAUX recording date */ |
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ct = c->start_time + (time_t)(c->frames / |
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((float)c->sys->frame_rate / (float)c->sys->frame_rate_base)); |
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brktimegm(ct, &tc); |
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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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case dv_audio_rectime: /* AAUX recording time */ |
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case dv_video_rectime: /* VAUX recording time */ |
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ct = c->start_time + (time_t)(c->frames / |
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((float)c->sys->frame_rate / (float)c->sys->frame_rate_base)); |
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brktimegm(ct, &tc); |
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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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default: |
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buf[1] = buf[2] = buf[3] = buf[4] = 0xff; |
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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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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]); |
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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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frame_ptr[d] = fifo_peek(&c->audio_data[channel], of*2+1); // FIXME: may be we have to admit
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frame_ptr[d+1] = fifo_peek(&c->audio_data[channel], of*2); // that DV is a big endian PCM
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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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} |
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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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int dv_assemble_frame(DVMuxContext *c, AVStream* st, |
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const uint8_t* data, int data_size, uint8_t** frame) |
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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) { |
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case CODEC_TYPE_VIDEO: |
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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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memcpy(*frame, data, c->sys->frame_size); |
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c->has_video = 1; |
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break; |
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case CODEC_TYPE_AUDIO: |
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for (i = 0; i < c->n_ast && st != c->ast[i]; i++); |
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/* FIXME: we have to have more sensible approach than this one */ |
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if (fifo_size(&c->audio_data[i], c->audio_data[i].rptr) + data_size >= 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) |
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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); |
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fifo_write(&c->audio_data[i], data, data_size, &c->audio_data[i].wptr); |
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/* Lets see if we've got enough audio for one DV frame */ |
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c->has_audio |= ((reqasize <= fifo_size(&c->audio_data[i], c->audio_data[i].rptr)) << i); |
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break; |
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default: |
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break; |
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} |
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/* Lets see if we have enough data to construct one DV frame */ |
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if (c->has_video == 1 && c->has_audio + 1 == 1<<c->n_ast) { |
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dv_inject_metadata(c, *frame); |
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for (i=0; i<c->n_ast; i++) { |
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dv_inject_audio(c, i, *frame); |
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fifo_drain(&c->audio_data[i], reqasize); |
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} |
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c->has_video = 0; |
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c->has_audio = 0; |
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c->frames++; |
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return c->sys->frame_size; |
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} |
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return 0; |
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} |
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DVMuxContext* dv_init_mux(AVFormatContext* s) |
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{ |
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DVMuxContext *c; |
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AVStream *vst = NULL; |
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int i; |
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/* we support at most 1 video and 2 audio streams */ |
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if (s->nb_streams > 3) |
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return NULL; |
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c = av_mallocz(sizeof(DVMuxContext)); |
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if (!c) |
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return NULL; |
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c->n_ast = 0; |
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c->ast[0] = c->ast[1] = NULL; |
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/* We have to sort out where audio and where video stream is */ |
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for (i=0; i<s->nb_streams; i++) { |
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switch (s->streams[i]->codec->codec_type) { |
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case CODEC_TYPE_VIDEO: |
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vst = s->streams[i]; |
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break; |
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case CODEC_TYPE_AUDIO: |
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c->ast[c->n_ast++] = s->streams[i]; |
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break; |
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default: |
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goto bail_out; |
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} |
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} |
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/* Some checks -- DV format is very picky about its incoming streams */ |
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if (!vst || vst->codec->codec_id != CODEC_ID_DVVIDEO) |
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goto bail_out; |
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for (i=0; i<c->n_ast; i++) { |
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if (c->ast[i] && (c->ast[i]->codec->codec_id != CODEC_ID_PCM_S16LE || |
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c->ast[i]->codec->sample_rate != 48000 || |
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c->ast[i]->codec->channels != 2)) |
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goto bail_out; |
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} |
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c->sys = dv_codec_profile(vst->codec); |
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if (!c->sys) |
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goto bail_out; |
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if((c->n_ast > 1) && (c->sys->n_difchan < 2)) { |
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/* only 1 stereo pair is allowed in 25Mbps mode */ |
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goto bail_out; |
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} |
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/* Ok, everything seems to be in working order */ |
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c->frames = 0; |
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c->has_audio = 0; |
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c->has_video = 0; |
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c->start_time = (time_t)s->timestamp; |
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for (i=0; i<c->n_ast; i++) { |
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if (c->ast[i] && fifo_init(&c->audio_data[i], 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0) { |
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while (i>0) { |
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i--; |
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fifo_free(&c->audio_data[i]); |
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} |
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goto bail_out; |
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} |
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} |
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return c; |
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|
|
||||||
|
bail_out: |
||||||
|
av_free(c); |
||||||
|
return NULL; |
||||||
|
} |
||||||
|
|
||||||
|
void dv_delete_mux(DVMuxContext *c) |
||||||
|
{ |
||||||
|
int i; |
||||||
|
for (i=0; i < c->n_ast; i++) |
||||||
|
fifo_free(&c->audio_data[i]); |
||||||
|
} |
||||||
|
|
||||||
|
#ifdef CONFIG_MUXERS |
||||||
|
static int dv_write_header(AVFormatContext *s) |
||||||
|
{ |
||||||
|
s->priv_data = dv_init_mux(s); |
||||||
|
if (!s->priv_data) { |
||||||
|
av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n" |
||||||
|
"Make sure that you supply exactly two streams:\n" |
||||||
|
" video: 25fps or 29.97fps, audio: 2ch/48Khz/PCM\n" |
||||||
|
" (50Mbps allows an optional second audio stream)\n"); |
||||||
|
return -1; |
||||||
|
} |
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
||||||
|
{ |
||||||
|
uint8_t* frame; |
||||||
|
int fsize; |
||||||
|
|
||||||
|
fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[pkt->stream_index], |
||||||
|
pkt->data, pkt->size, &frame); |
||||||
|
if (fsize > 0) { |
||||||
|
put_buffer(&s->pb, frame, fsize); |
||||||
|
put_flush_packet(&s->pb); |
||||||
|
} |
||||||
|
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) |
||||||
|
{ |
||||||
|
dv_delete_mux((DVMuxContext *)s->priv_data); |
||||||
|
return 0; |
||||||
|
} |
||||||
|
#endif /* CONFIG_MUXERS */ |
||||||
|
|
||||||
|
#ifdef CONFIG_DV_MUXER |
||||||
|
AVOutputFormat dv_muxer = { |
||||||
|
"dv", |
||||||
|
"DV video format", |
||||||
|
NULL, |
||||||
|
"dv", |
||||||
|
sizeof(DVMuxContext), |
||||||
|
CODEC_ID_PCM_S16LE, |
||||||
|
CODEC_ID_DVVIDEO, |
||||||
|
dv_write_header, |
||||||
|
dv_write_packet, |
||||||
|
dv_write_trailer, |
||||||
|
}; |
||||||
|
#endif |
||||||
Loading…
Reference in new issue