* of DV technical info.
*
* Raw DV format
- * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2002 Fabrice Bellard
*
* 50 Mbps (DVCPRO50) and 100 Mbps (DVCPRO HD) support
* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
#include <time.h>
#include "avformat.h"
#include "libavcodec/dvdata.h"
+#include "libavutil/intreadwrite.h"
#include "dv.h"
struct DVDemuxContext {
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_type = AVMEDIA_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->audio_pkt[i].flags |= AV_PKT_FLAG_KEY;
}
c->ast[i]->codec->sample_rate = dv_audio_frequency[freq];
c->ast[i]->codec->channels = 2;
c->frames = 0;
c->abytes = 0;
- c->vst->codec->codec_type = CODEC_TYPE_VIDEO;
+ c->vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
c->vst->codec->codec_id = CODEC_ID_DVVIDEO;
c->vst->codec->bit_rate = 25000000;
c->vst->start_time = 0;
uint8_t *ppcm[4] = {0};
if (buf_size < DV_PROFILE_BYTES ||
- !(c->sys = dv_frame_profile(buf)) ||
+ !(c->sys = ff_dv_frame_profile(c->sys, buf, buf_size)) ||
buf_size < c->sys->frame_size) {
return -1; /* Broken frame, or not enough data */
}
ppcm[i] = c->audio_buf[i];
}
dv_extract_audio(buf, ppcm, c->sys);
- c->abytes += size;
/* We work with 720p frames split in half, thus even frames have
* channels 0,1 and odd 2,3. */
if (c->sys->height == 720) {
- if (buf[1] & 0x0C)
+ if (buf[1] & 0x0C) {
c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
- else
+ } else {
c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
+ c->abytes += size;
+ }
+ } else {
+ c->abytes += size;
}
/* Now it's time to return video packet */
av_init_packet(pkt);
pkt->data = buf;
pkt->size = size;
- pkt->flags |= PKT_FLAG_KEY;
+ pkt->flags |= AV_PKT_FLAG_KEY;
pkt->stream_index = c->vst->id;
pkt->pts = c->frames;
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);
+ const DVprofile* sys = ff_dv_codec_profile(c->vst->codec);
int64_t offset;
- int64_t size = url_fsize(s->pb);
+ int64_t size = avio_size(s->pb) - s->data_offset;
int64_t max_offset = ((size-1) / sys->frame_size) * sys->frame_size;
offset = sys->frame_size * timestamp;
- if (offset > max_offset) offset = max_offset;
+ if (size >= 0 && offset > max_offset) offset = max_offset;
else if (offset < 0) offset = 0;
- return offset;
+ return offset + s->data_offset;
}
void dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
static int dv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
+ unsigned state, marker_pos = 0;
RawDVContext *c = s->priv_data;
c->dv_demux = dv_init_demux(s);
if (!c->dv_demux)
return -1;
- if (get_buffer(s->pb, c->buf, DV_PROFILE_BYTES) <= 0 ||
- url_fseek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0)
+ state = avio_rb32(s->pb);
+ while ((state & 0xffffff7f) != 0x1f07003f) {
+ if (url_feof(s->pb)) {
+ av_log(s, AV_LOG_ERROR, "Cannot find DV header.\n");
+ return -1;
+ }
+ if (state == 0x003f0700 || state == 0xff3f0700)
+ marker_pos = avio_tell(s->pb);
+ if (state == 0xff3f0701 && avio_tell(s->pb) - marker_pos == 80) {
+ avio_seek(s->pb, -163, SEEK_CUR);
+ state = avio_rb32(s->pb);
+ break;
+ }
+ state = (state << 8) | avio_r8(s->pb);
+ }
+ AV_WB32(c->buf, state);
+
+ if (avio_read(s->pb, c->buf + 4, DV_PROFILE_BYTES - 4) <= 0 ||
+ avio_seek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0)
return AVERROR(EIO);
- c->dv_demux->sys = dv_frame_profile(c->buf);
+ c->dv_demux->sys = ff_dv_frame_profile(c->dv_demux->sys, c->buf, DV_PROFILE_BYTES);
if (!c->dv_demux->sys) {
av_log(s, AV_LOG_ERROR, "Can't determine profile of DV input stream.\n");
return -1;
if (!c->dv_demux->sys)
return AVERROR(EIO);
size = c->dv_demux->sys->frame_size;
- if (get_buffer(s->pb, c->buf, size) <= 0)
+ if (avio_read(s->pb, c->buf, size) <= 0)
return AVERROR(EIO);
size = dv_produce_packet(c->dv_demux, pkt, c->buf, size);
dv_offset_reset(c, offset / c->sys->frame_size);
- offset = url_fseek(s->pb, offset, SEEK_SET);
+ offset = avio_seek(s->pb, offset, SEEK_SET);
return (offset < 0) ? offset : 0;
}
return 0;
}
-#ifdef CONFIG_DV_DEMUXER
-AVInputFormat dv_demuxer = {
+static int dv_probe(AVProbeData *p)
+{
+ unsigned state, marker_pos = 0;
+ int i;
+ int matches = 0;
+ int secondary_matches = 0;
+
+ if (p->buf_size < 5)
+ return 0;
+
+ state = AV_RB32(p->buf);
+ for (i = 4; i < p->buf_size; i++) {
+ if ((state & 0xffffff7f) == 0x1f07003f)
+ matches++;
+ // any section header, also with seq/chan num != 0,
+ // should appear around every 12000 bytes, at least 10 per frame
+ if ((state & 0xff07ff7f) == 0x1f07003f)
+ secondary_matches++;
+ if (state == 0x003f0700 || state == 0xff3f0700)
+ marker_pos = i;
+ if (state == 0xff3f0701 && i - marker_pos == 80)
+ matches++;
+ state = (state << 8) | p->buf[i];
+ }
+
+ if (matches && p->buf_size / matches < 1024*1024) {
+ if (matches > 4 || (secondary_matches >= 10 && p->buf_size / secondary_matches < 24000))
+ return AVPROBE_SCORE_MAX*3/4; // not max to avoid dv in mov to match
+ return AVPROBE_SCORE_MAX/4;
+ }
+ return 0;
+}
+
+#if CONFIG_DV_DEMUXER
+AVInputFormat ff_dv_demuxer = {
"dv",
NULL_IF_CONFIG_SMALL("DV video format"),
sizeof(RawDVContext),
- NULL,
+ dv_probe,
dv_read_header,
dv_read_packet,
dv_read_close,
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