AVStream* vst;
AVStream* ast[2];
AVPacket audio_pkt[2];
+ uint8_t audio_buf[2][8192];
int ach;
+ int frames;
+ uint64_t abytes;
};
struct DVMuxContext {
case dv_timecode:
ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
(float)c->sys->frame_rate_base));
- localtime_r(&ct, &tc);
+ brktimegm(ct, &tc);
/*
* LTC drop-frame frame counter drops two frames (0 and 1) every
* minute, unless it is exactly divisible by 10
case dv_viedo_recdate: /* VAUX recording date */
ct = c->start_time + (time_t)(c->frames /
((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
- localtime_r(&ct, &tc);
+ 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); /* Units of month */
+ ((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_video_rectime: /* VAUX recording time */
ct = c->start_time + (time_t)(c->frames /
((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
- localtime_r(&ct, &tc);
+ 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 */
/* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
for (j = 0; j < 135; j++) {
if (j%15 == 0) {
+ memset(buf, 0xff, 80);
buf += dv_write_dif_id(dv_sect_audio, i, j/15, buf);
- buf += dv_write_pack(dv_aaux_packs_dist[i][j/15], c, buf);
- buf += 72; /* shuffled PCM audio */
+ buf += 77; /* audio control & shuffled PCM audio */
}
buf += dv_write_dif_id(dv_sect_video, i, j, buf);
buf += 77; /* 1 video macro block: 1 bytes control
static void dv_inject_audio(DVMuxContext *c, const uint8_t* pcm, uint8_t* frame_ptr)
{
- int i, j, d, of;
+ int i, j, d, of, size;
+ size = 4 * dv_audio_frame_size(c->sys, c->frames);
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]);
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] = pcm[of*2+1]; // FIXME: may be we have to admit
frame_ptr[d+1] = pcm[of*2]; // that DV is a big endian PCM
}
{
const uint8_t* as_pack;
const DVprofile* sys;
- int freq, smpls, quant, i;
+ int freq, smpls, quant, i, ach;
sys = dv_frame_profile(frame);
as_pack = dv_extract_pack(frame, dv_audio_source);
if (!as_pack || !sys) { /* No audio ? */
c->ach = 0;
- return -1;
+ return 0;
}
smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
- c->ach = (quant && freq == 2) ? 2 : 1;
-
- /* The second stereo channel could appear in IEC 61834 stream only */
- if (c->ach == 2 && !c->ast[1]) {
- c->ast[1] = av_new_stream(c->fctx, 0);
- if (c->ast[1]) {
- c->ast[1]->codec.codec_type = CODEC_TYPE_AUDIO;
- c->ast[1]->codec.codec_id = CODEC_ID_PCM_S16LE;
- } else
- c->ach = 1;
- }
- for (i=0; i<c->ach; i++) {
+ ach = (quant && freq == 2) ? 2 : 1;
+
+ /* Dynamic handling of the audio streams in DV */
+ for (i=0; i<ach; i++) {
+ if (!c->ast[i]) {
+ c->ast[i] = av_new_stream(c->fctx, 0);
+ if (!c->ast[i])
+ break;
+ av_set_pts_info(c->ast[i], 64, 1, 30000);
+ c->ast[i]->codec.codec_type = CODEC_TYPE_AUDIO;
+ c->ast[i]->codec.codec_id = CODEC_ID_PCM_S16LE;
+
+ av_init_packet(&c->audio_pkt[i]);
+ c->audio_pkt[i].size = 0;
+ c->audio_pkt[i].data = c->audio_buf[i];
+ c->audio_pkt[i].stream_index = c->ast[i]->index;
+ c->audio_pkt[i].flags |= PKT_FLAG_KEY;
+ }
c->ast[i]->codec.sample_rate = dv_audio_frequency[freq];
c->ast[i]->codec.channels = 2;
c->ast[i]->codec.bit_rate = 2 * dv_audio_frequency[freq] * 16;
+ c->ast[i]->start_time = 0;
}
+ c->ach = i;
return (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
}
if (sys) {
avctx = &c->vst->codec;
- avctx->frame_rate = sys->frame_rate;
- avctx->frame_rate_base = sys->frame_rate_base;
+ av_set_pts_info(c->vst, 64, sys->frame_rate_base, sys->frame_rate);
+ avctx->time_base= (AVRational){sys->frame_rate_base, sys->frame_rate};
avctx->width = sys->width;
avctx->height = sys->height;
avctx->pix_fmt = sys->pix_fmt;
+ /* finding out SAR is a little bit messy */
vsc_pack = dv_extract_pack(frame, dv_video_control);
apt = frame[4] & 0x07;
- is16_9 = (vsc_pack && (vsc_pack[2] & 0x07) == (apt?0x02:0x07));
+ is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 ||
+ (!apt && (vsc_pack[2] & 0x07) == 0x07)));
avctx->sample_aspect_ratio = sys->sar[is16_9];
size = sys->frame_size;
if (c->has_audio && c->has_video) { /* must be a stale frame */
dv_format_frame(c, *frame);
c->frames++;
- c->has_audio = c->has_video = 0;
+ if (c->has_audio > 0)
+ c->has_audio = 0;
+ c->has_video = 0;
}
if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
dv_inject_video(c, data, *frame);
c->has_video = 1;
data_size = 0;
+ if (c->has_audio < 0)
+ goto out;
}
reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
fifo_write(&c->audio_data, (uint8_t *)data, data_size, &c->audio_data.wptr);
}
+out:
return (c->has_audio && c->has_video) ? c->sys->frame_size : 0;
}
DVMuxContext* dv_init_mux(AVFormatContext* s)
{
DVMuxContext *c;
- AVStream *vst;
- AVStream *ast;
+ AVStream *vst = NULL;
+ AVStream *ast = NULL;
+ int i;
+
+ if (s->nb_streams > 2)
+ return NULL;
c = av_mallocz(sizeof(DVMuxContext));
if (!c)
return NULL;
- if (s->nb_streams != 2)
- goto bail_out;
-
/* We have to sort out where audio and where video stream is */
- if (s->streams[0]->codec.codec_type == CODEC_TYPE_VIDEO &&
- s->streams[1]->codec.codec_type == CODEC_TYPE_AUDIO) {
- vst = s->streams[0];
- ast = s->streams[1];
+ for (i=0; i<s->nb_streams; i++) {
+ switch (s->streams[i]->codec.codec_type) {
+ case CODEC_TYPE_VIDEO:
+ vst = s->streams[i];
+ break;
+ case CODEC_TYPE_AUDIO:
+ ast = s->streams[i];
+ break;
+ default:
+ goto bail_out;
+ }
}
- else if (s->streams[1]->codec.codec_type == CODEC_TYPE_VIDEO &&
- s->streams[0]->codec.codec_type == CODEC_TYPE_AUDIO) {
- vst = s->streams[1];
- ast = s->streams[0];
- } else
- goto bail_out;
-
+
/* Some checks -- DV format is very picky about its incoming streams */
- if (vst->codec.codec_id != CODEC_ID_DVVIDEO ||
- ast->codec.codec_id != CODEC_ID_PCM_S16LE)
- goto bail_out;
- if (ast->codec.sample_rate != 48000 ||
- ast->codec.channels != 2)
- goto bail_out;
-
+ if (!vst || vst->codec.codec_id != CODEC_ID_DVVIDEO)
+ goto bail_out;
+ if (ast && (ast->codec.codec_id != CODEC_ID_PCM_S16LE ||
+ ast->codec.sample_rate != 48000 ||
+ ast->codec.channels != 2))
+ goto bail_out;
c->sys = dv_codec_profile(&vst->codec);
if (!c->sys)
goto bail_out;
/* Ok, everything seems to be in working order */
c->frames = 0;
- c->has_audio = c->has_video = 0;
- c->start_time = time(NULL);
+ c->has_audio = ast ? 0 : -1;
+ c->has_video = 0;
+ c->start_time = (time_t)s->timestamp;
c->aspect = 0; /* 4:3 is the default */
if ((int)(av_q2d(vst->codec.sample_aspect_ratio) * vst->codec.width / vst->codec.height * 10) == 17) /* 16:9 */
c->aspect = 0x07;
- if (fifo_init(&c->audio_data, 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0)
+ if (ast && fifo_init(&c->audio_data, 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0)
goto bail_out;
dv_format_frame(c, &c->frame_buf[0]);
return NULL;
c->vst = av_new_stream(s, 0);
- c->ast[0] = av_new_stream(s, 0);
- if (!c->vst || !c->ast[0])
- goto fail;
+ if (!c->vst) {
+ av_free(c);
+ return NULL;
+ }
+
c->fctx = s;
- c->ast[1] = NULL;
+ c->ast[0] = c->ast[1] = NULL;
c->ach = 0;
- c->audio_pkt[0].size = 0;
- c->audio_pkt[1].size = 0;
-
+ c->frames = 0;
+ c->abytes = 0;
+
c->vst->codec.codec_type = CODEC_TYPE_VIDEO;
c->vst->codec.codec_id = CODEC_ID_DVVIDEO;
c->vst->codec.bit_rate = 25000000;
-
- c->ast[0]->codec.codec_type = CODEC_TYPE_AUDIO;
- c->ast[0]->codec.codec_id = CODEC_ID_PCM_S16LE;
-
- s->ctx_flags |= AVFMTCTX_NOHEADER;
+ c->vst->start_time = 0;
return c;
-
-fail:
- if (c->vst)
- av_free(c->vst);
- if (c->ast[0])
- av_free(c->ast[0]);
- av_free(c);
- return NULL;
-}
-
-static void __destruct_pkt(struct AVPacket *pkt)
-{
- pkt->data = NULL; pkt->size = 0;
- return;
}
int dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
uint8_t* buf, int buf_size)
{
int size, i;
+ const DVprofile* sys = dv_frame_profile(buf);
- if (buf_size < 4 || buf_size < dv_frame_profile(buf)->frame_size)
+ if (buf_size < 4 || buf_size < sys->frame_size)
return -1; /* Broken frame, or not enough data */
/* Queueing audio packet */
/* FIXME: in case of no audio/bad audio we have to do something */
size = dv_extract_audio_info(c, buf);
- c->audio_pkt[0].data = c->audio_pkt[1].data = NULL;
for (i=0; i<c->ach; i++) {
- if (av_new_packet(&c->audio_pkt[i], size) < 0)
- return AVERROR_NOMEM;
- c->audio_pkt[i].stream_index = c->ast[i]->index;
+ c->audio_pkt[i].size = size;
+ c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec.bit_rate;
}
- dv_extract_audio(buf, c->audio_pkt[0].data, c->audio_pkt[1].data);
+ dv_extract_audio(buf, c->audio_buf[0], c->audio_buf[1]);
+ c->abytes += size;
/* Now it's time to return video packet */
size = dv_extract_video_info(c, buf);
av_init_packet(pkt);
- pkt->destruct = __destruct_pkt;
pkt->data = buf;
pkt->size = size;
pkt->flags |= PKT_FLAG_KEY;
pkt->stream_index = c->vst->id;
+ pkt->pts = c->frames;
+
+ c->frames++;
return size;
}
+static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c,
+ int64_t timestamp, int flags)
+{
+ // FIXME: sys may be wrong if last dv_read_packet() failed (buffer is junk)
+ const DVprofile* sys = dv_codec_profile(&c->vst->codec);
+ int64_t offset;
+ int64_t size = url_fsize(&s->pb);
+ int64_t max_offset = ((size-1) / sys->frame_size) * sys->frame_size;
+
+ offset = sys->frame_size * timestamp;
+
+ if (offset > max_offset) offset = max_offset;
+ else if (offset < 0) offset = 0;
+
+ return offset;
+}
+
+void dv_flush_audio_packets(DVDemuxContext *c)
+{
+ c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
+}
+
/************************************************************
* Implementation of the easiest DV storage of all -- raw DV.
************************************************************/
AVFormatParameters *ap)
{
RawDVContext *c = s->priv_data;
+ const DVprofile* sys;
c->dv_demux = dv_init_demux(s);
+ if (!c->dv_demux)
+ return -1;
- return c->dv_demux ? 0 : -1;
+ if (get_buffer(&s->pb, c->buf, 4) <= 0 || url_fseek(&s->pb, -4, SEEK_CUR) < 0)
+ return AVERROR_IO;
+
+ sys = dv_frame_profile(c->buf);
+ s->bit_rate = av_rescale(sys->frame_size * 8, sys->frame_rate, sys->frame_rate_base);
+
+ return 0;
}
if (size < 0) {
if (get_buffer(&s->pb, c->buf, 4) <= 0)
- return -EIO;
+ return AVERROR_IO;
size = dv_frame_profile(c->buf)->frame_size;
if (get_buffer(&s->pb, c->buf + 4, size - 4) <= 0)
- return -EIO;
+ return AVERROR_IO;
size = dv_produce_packet(c->dv_demux, pkt, c->buf, size);
}
return size;
}
+static int dv_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
+{
+ RawDVContext *r = s->priv_data;
+ DVDemuxContext *c = r->dv_demux;
+ int64_t offset= dv_frame_offset(s, c, timestamp, flags);
+ const DVprofile* sys = dv_codec_profile(&c->vst->codec);
+
+ c->frames= offset / sys->frame_size;
+ if (c->ach)
+ c->abytes= av_rescale(c->frames,
+ c->ast[0]->codec.bit_rate * (int64_t)sys->frame_rate_base,
+ 8*sys->frame_rate);
+
+ dv_flush_audio_packets(c);
+ return url_fseek(&s->pb, offset, SEEK_SET);
+}
+
static int dv_read_close(AVFormatContext *s)
{
RawDVContext *c = s->priv_data;
return 0;
}
-static int dv_write_packet(struct AVFormatContext *s,
- int stream_index,
- const uint8_t *buf, int size, int64_t pts)
+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[stream_index],
- buf, size, &frame);
+ 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);
dv_read_header,
dv_read_packet,
dv_read_close,
- .extensions = "dv",
+ dv_read_seek,
+ .extensions = "dv,dif",
};
static AVOutputFormat dv_oformat = {
projects / ffmpeg / blobdiff