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avformat/dvenc: support muxing dvcprohd

This commit is contained in:
Baptiste Coudurier 2019-11-09 15:56:32 -08:00
parent 93414ce831
commit eafa8e8592
1 changed files with 22 additions and 26 deletions
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48
libavformat/dvenc.c
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@ -28,7 +28,6 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <time.h>
#include <stdarg.h>
#include "avformat.h"
#include "internal.h"
@ -48,8 +47,8 @@ struct DVMuxContext {
AVClass *av_class;
const AVDVProfile* 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 */
AVStream *ast[4]; /* stereo audio streams */
AVFifoBuffer *audio_data[4]; /* 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 */
@ -87,14 +86,12 @@ static int dv_audio_frame_size(const AVDVProfile* sys, int frame, int sample_rat
sizeof(sys->audio_samples_dist[0]))];
}
static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, ...)
static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, int channel, int seq)
{
struct tm tc;
time_t ct;
uint32_t timecode;
va_list ap;
int audio_type = 0;
int channel;
buf[0] = (uint8_t)pack_id;
switch (pack_id) {
@ -104,8 +101,6 @@ static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* bu
AV_WB32(buf + 1, timecode);
break;
case dv_audio_source: /* AAUX source pack */
va_start(ap, buf);
channel = va_arg(ap, int);
if (c->ast[channel]->codecpar->sample_rate == 44100) {
audio_type = 1;
} else if (c->ast[channel]->codecpar->sample_rate == 32000)
@ -118,17 +113,16 @@ static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* bu
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 */
(seq >= c->sys->difseg_size/2); /* audio mode (1st or 2nd channel) */
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 */
(DV_PROFILE_IS_HD(c->sys) ? 0x3 : c->sys->video_stype ? 2 : 0); /* stype */
buf[4] = (1 << 7) | /* emphasis: 1 -- off */
(0 << 6) | /* emphasis time constant: 0 -- reserved */
(audio_type << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
0; /* quantization: 0 -- 16-bit linear, 1 -- 12-bit nonlinear */
va_end(ap);
break;
case dv_audio_control:
buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
@ -192,7 +186,7 @@ static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
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], channel, i >= c->sys->difseg_size/2);
dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3], channel, i);
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)
@ -210,27 +204,28 @@ static void dv_inject_metadata(DVMuxContext *c, uint8_t* frame)
{
int j, k;
uint8_t* buf;
int seq = 0;
for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80) {
for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80, seq++) {
/* 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]);
dv_write_pack(dv_timecode, c, &buf[j+k], 0, seq);
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_write_pack(dv_video_recdate, c, &buf[j+14], 0, seq);
dv_write_pack(dv_video_rectime, c, &buf[j+22], 0, seq);
dv_write_pack(dv_video_recdate, c, &buf[j+38], 0, seq);
dv_write_pack(dv_video_rectime, c, &buf[j+46], 0, seq);
}
}
/* 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]);
dv_write_pack(dv_video_recdate, c, &buf[j+5* 2], 0, seq);
dv_write_pack(dv_video_rectime, c, &buf[j+5* 3], 0, seq);
dv_write_pack(dv_video_recdate, c, &buf[j+5*11], 0, seq);
dv_write_pack(dv_video_rectime, c, &buf[j+5*12], 0, seq);
}
}
}
@ -307,11 +302,11 @@ static DVMuxContext* dv_init_mux(AVFormatContext* s)
int i;
/* we support at most 1 video and 2 audio streams */
if (s->nb_streams > 3)
if (s->nb_streams > 5)
return NULL;
c->n_ast = 0;
c->ast[0] = c->ast[1] = NULL;
c->ast[0] = c->ast[1] = c->ast[2] = c->ast[3] = NULL;
/* We have to sort out where audio and where video stream is */
for (i=0; i<s->nb_streams; i++) {
@ -355,8 +350,9 @@ static DVMuxContext* dv_init_mux(AVFormatContext* s)
goto bail_out;
}
if ((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
/* only 1 stereo pair is allowed in 25Mbps mode */
if (((c->n_ast > 1) && (c->sys->n_difchan < 2)) ||
((c->n_ast > 2) && (c->sys->n_difchan < 4))) {
/* only 2 stereo pairs allowed in 50Mbps mode */
goto bail_out;
}