* of DV technical info.
*
* Raw DV format
- * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2002 Fabrice Bellard
*
* 50 Mbps (DVCPRO50) support
* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
#include "libavutil/fifo.h"
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; /* Number of a current frame */
- time_t start_time; /* Start time of recording */
- 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 */
+ 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 */
+ 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 */
};
static const int dv_aaux_packs_dist[12][9] = {
static int dv_audio_frame_size(const DVprofile* sys, int frame)
{
- return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist)/
+ return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist) /
sizeof(sys->audio_samples_dist[0]))];
}
buf[0] = (uint8_t)pack_id;
switch (pack_id) {
case dv_timecode:
- ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
- (float)c->sys->frame_rate_base));
+ 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 fame: 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->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);
(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 << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
va_end(ap);
break;
7;
buf[3] = (1 << 7) | /* direction: 1 -- forward */
(c->sys->pix_fmt == PIX_FMT_YUV420P ? 0x20 : /* speed */
- c->sys->ltc_divisor*4);
+ 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 + (time_t)(c->frames /
- ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
+ ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
+ c->sys->time_base.den, AV_ROUND_DOWN);
brktimegm(ct, &tc);
buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
/* 0xff is very likely to be "unknown" */
break;
case dv_audio_rectime: /* AAUX recording time */
case dv_video_rectime: /* VAUX recording time */
- ct = c->start_time + (time_t)(c->frames /
- ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
+ ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
+ c->sys->time_base.den, AV_ROUND_DOWN);
brktimegm(ct, &tc);
buf[1] = (3 << 6) | /* reserved -- always 1 */
0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
if (of*2 >= size)
continue;
- frame_ptr[d] = av_fifo_peek(&c->audio_data[channel], of*2+1); // FIXME: may be 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_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 += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
}
*/
int dv_assemble_frame(DVMuxContext *c, AVStream* st,
- const uint8_t* data, int data_size, uint8_t** frame)
+ uint8_t* data, int data_size, uint8_t** frame)
{
int i, reqasize;
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*AVCODEC_MAX_AUDIO_FRAME_SIZE)
+ if (av_fifo_size(c->audio_data[i]) + data_size >= 100*AVCODEC_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);
+ av_fifo_generic_write(c->audio_data[i], data, data_size, NULL);
- /* Lets see if we've got enough audio for one DV frame */
- c->has_audio |= ((reqasize <= av_fifo_size(&c->audio_data[i])) << i);
+ /* 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;
}
- /* Lets see if we have enough data to construct one DV frame */
- if (c->has_video == 1 && c->has_audio + 1 == 1<<c->n_ast) {
+ /* 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++) {
+ 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);
+ av_fifo_drain(c->audio_data[i], reqasize);
+ c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
}
c->has_video = 0;
if (s->nb_streams > 3)
return NULL;
- c->n_ast = 0;
+ c->n_ast = 0;
c->ast[0] = c->ast[1] = NULL;
/* We have to sort out where audio and where video stream is */
if (!vst || vst->codec->codec_id != CODEC_ID_DVVIDEO)
goto bail_out;
for (i=0; i<c->n_ast; i++) {
- if (c->ast[i] && (c->ast[i]->codec->codec_id != CODEC_ID_PCM_S16LE ||
+ if (c->ast[i] && (c->ast[i]->codec->codec_id != CODEC_ID_PCM_S16LE ||
c->ast[i]->codec->sample_rate != 48000 ||
- c->ast[i]->codec->channels != 2))
+ c->ast[i]->codec->channels != 2))
goto bail_out;
}
c->sys = dv_codec_profile(vst->codec);
if (!c->sys)
goto bail_out;
- if((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
+ 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;
+ c->frames = 0;
+ c->has_audio = 0;
+ c->has_video = 0;
c->start_time = (time_t)s->timestamp;
- for (i=0; i<c->n_ast; i++) {
- if (c->ast[i] && av_fifo_init(&c->audio_data[i], 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0) {
- while (i>0) {
+ 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))) {
+ while (i > 0) {
i--;
- av_fifo_free(&c->audio_data[i]);
+ av_fifo_free(c->audio_data[i]);
}
goto bail_out;
}
{
int i;
for (i=0; i < c->n_ast; i++)
- av_fifo_free(&c->audio_data[i]);
+ av_fifo_free(c->audio_data[i]);
}
-#ifdef CONFIG_MUXERS
+#if CONFIG_DV_MUXER
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"
+ " video: 25fps or 29.97fps, audio: 2ch/48kHz/PCM\n"
" (50Mbps allows an optional second audio stream)\n");
return -1;
}
dv_delete_mux(s->priv_data);
return 0;
}
-#endif /* CONFIG_MUXERS */
-#ifdef CONFIG_DV_MUXER
AVOutputFormat dv_muxer = {
"dv",
- "DV video format",
+ NULL_IF_CONFIG_SMALL("DV video format"),
NULL,
"dv",
sizeof(DVMuxContext),
dv_write_packet,
dv_write_trailer,
};
-#endif
+#endif /* CONFIG_DV_MUXER */
projects / frescor / ffmpeg.git / blobdiff