mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
3cbe112653
This is necessary to avoid target config settings bleeding into the host compilation process with hardcoded tables and the DV VLC tables no longer present as static tables in a header file.
418 lines
16 KiB
C
418 lines
16 KiB
C
/*
|
|
* General DV muxer/demuxer
|
|
* Copyright (c) 2003 Roman Shaposhnik
|
|
*
|
|
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
|
|
* of DV technical info.
|
|
*
|
|
* Raw DV format
|
|
* Copyright (c) 2002 Fabrice Bellard
|
|
*
|
|
* 50 Mbps (DVCPRO50) support
|
|
* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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,
|
|
* 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
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include <time.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "libavcodec/dv_profile.h"
|
|
#include "libavcodec/dv.h"
|
|
#include "dv.h"
|
|
#include "libavutil/fifo.h"
|
|
#include "libavutil/mathematics.h"
|
|
|
|
#define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
|
|
|
|
struct DVMuxContext {
|
|
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 */
|
|
int64_t start_time; /* recording start time */
|
|
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 */
|
|
};
|
|
|
|
static const int dv_aaux_packs_dist[12][9] = {
|
|
{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
|
|
{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
|
|
{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
|
|
{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
|
|
{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
|
|
{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
|
|
{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
|
|
{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
|
|
{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
|
|
{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
|
|
{ 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
|
|
{ 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
|
|
};
|
|
|
|
static int dv_audio_frame_size(const DVprofile* sys, int frame)
|
|
{
|
|
return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist) /
|
|
sizeof(sys->audio_samples_dist[0]))];
|
|
}
|
|
|
|
static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, ...)
|
|
{
|
|
struct tm tc;
|
|
time_t ct;
|
|
int ltc_frame;
|
|
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 */
|
|
break;
|
|
case dv_audio_source: /* AAUX source pack */
|
|
va_start(ap, buf);
|
|
buf[1] = (1 << 7) | /* locked mode -- SMPTE only supports locked mode */
|
|
(1 << 6) | /* reserved -- always 1 */
|
|
(dv_audio_frame_size(c->sys, c->frames) -
|
|
c->sys->audio_min_samples[0]);
|
|
/* # of samples */
|
|
buf[2] = (0 << 7) | /* multi-stereo */
|
|
(0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
|
|
(0 << 4) | /* pair bit: 0 -- one pair of channels */
|
|
!!va_arg(ap, int); /* audio mode */
|
|
buf[3] = (1 << 7) | /* res */
|
|
(1 << 6) | /* multi-language flag */
|
|
(c->sys->dsf << 5) | /* system: 60fields/50fields */
|
|
(c->sys->n_difchan & 2); /* definition: 0 -- 25Mbps, 2 -- 50Mbps */
|
|
buf[4] = (1 << 7) | /* emphasis: 1 -- off */
|
|
(0 << 6) | /* emphasis time constant: 0 -- reserved */
|
|
(0 << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
|
|
0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
|
|
va_end(ap);
|
|
break;
|
|
case dv_audio_control:
|
|
buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
|
|
(1 << 4) | /* input source: 1 -- digital input */
|
|
(3 << 2) | /* compression: 3 -- no information */
|
|
0; /* misc. info/SMPTE emphasis off */
|
|
buf[2] = (1 << 7) | /* recording start point: 1 -- no */
|
|
(1 << 6) | /* recording end point: 1 -- no */
|
|
(1 << 3) | /* recording mode: 1 -- original */
|
|
7;
|
|
buf[3] = (1 << 7) | /* direction: 1 -- forward */
|
|
(c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0x20 : /* speed */
|
|
c->sys->ltc_divisor * 4);
|
|
buf[4] = (1 << 7) | /* reserved -- always 1 */
|
|
0x7f; /* genre category */
|
|
break;
|
|
case dv_audio_recdate:
|
|
case dv_video_recdate: /* VAUX recording date */
|
|
ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
|
|
c->sys->time_base.den, AV_ROUND_DOWN);
|
|
ff_brktimegm(ct, &tc);
|
|
buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
|
|
/* 0xff is very likely to be "unknown" */
|
|
buf[2] = (3 << 6) | /* reserved -- always 1 */
|
|
((tc.tm_mday / 10) << 4) | /* Tens of day */
|
|
(tc.tm_mday % 10); /* Units of day */
|
|
buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
|
|
((tc.tm_mon / 10) << 4) | /* Tens of month */
|
|
(tc.tm_mon % 10); /* Units of month */
|
|
buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
|
|
(tc.tm_year % 10); /* Units of year */
|
|
break;
|
|
case dv_audio_rectime: /* AAUX recording time */
|
|
case dv_video_rectime: /* VAUX recording time */
|
|
ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
|
|
c->sys->time_base.den, AV_ROUND_DOWN);
|
|
ff_brktimegm(ct, &tc);
|
|
buf[1] = (3 << 6) | /* reserved -- always 1 */
|
|
0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
|
|
buf[2] = (1 << 7) | /* reserved -- always 1 */
|
|
((tc.tm_sec / 10) << 4) | /* Tens of seconds */
|
|
(tc.tm_sec % 10); /* Units of seconds */
|
|
buf[3] = (1 << 7) | /* reserved -- always 1 */
|
|
((tc.tm_min / 10) << 4) | /* Tens of minutes */
|
|
(tc.tm_min % 10); /* Units of minutes */
|
|
buf[4] = (3 << 6) | /* reserved -- always 1 */
|
|
((tc.tm_hour / 10) << 4) | /* Tens of hours */
|
|
(tc.tm_hour % 10); /* Units of hours */
|
|
break;
|
|
default:
|
|
buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
|
|
}
|
|
return 5;
|
|
}
|
|
|
|
static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
|
|
{
|
|
int i, j, d, of, size;
|
|
size = 4 * dv_audio_frame_size(c->sys, c->frames);
|
|
frame_ptr += channel * c->sys->difseg_size * 150 * 80;
|
|
for (i = 0; i < c->sys->difseg_size; i++) {
|
|
frame_ptr += 6 * 80; /* skip DIF segment header */
|
|
for (j = 0; j < 9; j++) {
|
|
dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3], i >= c->sys->difseg_size/2);
|
|
for (d = 8; d < 80; d+=2) {
|
|
of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
|
|
if (of*2 >= size)
|
|
continue;
|
|
|
|
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 */
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dv_inject_metadata(DVMuxContext *c, uint8_t* frame)
|
|
{
|
|
int j, k;
|
|
uint8_t* buf;
|
|
|
|
for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80) {
|
|
/* DV subcode: 2nd and 3d DIFs */
|
|
for (j = 80; j < 80 * 3; j += 80) {
|
|
for (k = 6; k < 6 * 8; k += 8)
|
|
dv_write_pack(dv_timecode, c, &buf[j+k]);
|
|
|
|
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 ? */
|
|
dv_write_pack(dv_video_recdate, c, &buf[j+14]);
|
|
dv_write_pack(dv_video_rectime, c, &buf[j+22]);
|
|
dv_write_pack(dv_video_recdate, c, &buf[j+38]);
|
|
dv_write_pack(dv_video_rectime, c, &buf[j+46]);
|
|
}
|
|
}
|
|
|
|
/* DV VAUX: 4th, 5th and 6th 3DIFs */
|
|
for (j = 80*3 + 3; j < 80*6; j += 80) {
|
|
dv_write_pack(dv_video_recdate, c, &buf[j+5*2]);
|
|
dv_write_pack(dv_video_rectime, c, &buf[j+5*3]);
|
|
dv_write_pack(dv_video_recdate, c, &buf[j+5*11]);
|
|
dv_write_pack(dv_video_rectime, c, &buf[j+5*12]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The following 3 functions constitute our interface to the world
|
|
*/
|
|
|
|
static int dv_assemble_frame(DVMuxContext *c, AVStream* st,
|
|
uint8_t* data, int data_size, uint8_t** frame)
|
|
{
|
|
int i, reqasize;
|
|
|
|
*frame = &c->frame_buf[0];
|
|
reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
|
|
|
|
switch (st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
/* FIXME: we have to have more sensible approach than this one */
|
|
if (c->has_video)
|
|
av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
|
|
|
|
memcpy(*frame, data, c->sys->frame_size);
|
|
c->has_video = 1;
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
for (i = 0; i < c->n_ast && st != c->ast[i]; i++);
|
|
|
|
/* FIXME: we have to have more sensible approach than this one */
|
|
if (av_fifo_size(c->audio_data[i]) + data_size >= 100*MAX_AUDIO_FRAME_SIZE)
|
|
av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
|
|
av_fifo_generic_write(c->audio_data[i], data, data_size, NULL);
|
|
|
|
/* Let us see if we've got enough audio for one DV frame. */
|
|
c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Let us see if we have enough data to construct one DV frame. */
|
|
if (c->has_video == 1 && c->has_audio + 1 == 1 << c->n_ast) {
|
|
dv_inject_metadata(c, *frame);
|
|
c->has_audio = 0;
|
|
for (i=0; i < c->n_ast; i++) {
|
|
dv_inject_audio(c, i, *frame);
|
|
av_fifo_drain(c->audio_data[i], reqasize);
|
|
c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
|
|
}
|
|
|
|
c->has_video = 0;
|
|
|
|
c->frames++;
|
|
|
|
return c->sys->frame_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static DVMuxContext* dv_init_mux(AVFormatContext* s)
|
|
{
|
|
DVMuxContext *c = s->priv_data;
|
|
AVStream *vst = NULL;
|
|
AVDictionaryEntry *t;
|
|
int i;
|
|
|
|
/* we support at most 1 video and 2 audio streams */
|
|
if (s->nb_streams > 3)
|
|
return NULL;
|
|
|
|
c->n_ast = 0;
|
|
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++) {
|
|
switch (s->streams[i]->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if (vst) return NULL;
|
|
vst = s->streams[i];
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
if (c->n_ast > 1) return NULL;
|
|
c->ast[c->n_ast++] = s->streams[i];
|
|
break;
|
|
default:
|
|
goto bail_out;
|
|
}
|
|
}
|
|
|
|
/* Some checks -- DV format is very picky about its incoming streams */
|
|
if (!vst || vst->codec->codec_id != AV_CODEC_ID_DVVIDEO)
|
|
goto bail_out;
|
|
for (i=0; i<c->n_ast; i++) {
|
|
if (c->ast[i] && (c->ast[i]->codec->codec_id != AV_CODEC_ID_PCM_S16LE ||
|
|
c->ast[i]->codec->sample_rate != 48000 ||
|
|
c->ast[i]->codec->channels != 2))
|
|
goto bail_out;
|
|
}
|
|
c->sys = avpriv_dv_codec_profile(vst->codec);
|
|
if (!c->sys)
|
|
goto bail_out;
|
|
|
|
if ((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
|
|
/* only 1 stereo pair is allowed in 25Mbps mode */
|
|
goto bail_out;
|
|
}
|
|
|
|
/* Ok, everything seems to be in working order */
|
|
c->frames = 0;
|
|
c->has_audio = 0;
|
|
c->has_video = 0;
|
|
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*MAX_AUDIO_FRAME_SIZE))) {
|
|
while (i > 0) {
|
|
i--;
|
|
av_fifo_free(c->audio_data[i]);
|
|
}
|
|
goto bail_out;
|
|
}
|
|
}
|
|
|
|
return c;
|
|
|
|
bail_out:
|
|
return NULL;
|
|
}
|
|
|
|
static void dv_delete_mux(DVMuxContext *c)
|
|
{
|
|
int i;
|
|
for (i=0; i < c->n_ast; i++)
|
|
av_fifo_free(c->audio_data[i]);
|
|
}
|
|
|
|
static int dv_write_header(AVFormatContext *s)
|
|
{
|
|
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"
|
|
" 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(s->priv_data, s->streams[pkt->stream_index],
|
|
pkt->data, pkt->size, &frame);
|
|
if (fsize > 0) {
|
|
avio_write(s->pb, frame, fsize);
|
|
}
|
|
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(s->priv_data);
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_dv_muxer = {
|
|
.name = "dv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
|
|
.extensions = "dv",
|
|
.priv_data_size = sizeof(DVMuxContext),
|
|
.audio_codec = AV_CODEC_ID_PCM_S16LE,
|
|
.video_codec = AV_CODEC_ID_DVVIDEO,
|
|
.write_header = dv_write_header,
|
|
.write_packet = dv_write_packet,
|
|
.write_trailer = dv_write_trailer,
|
|
};
|