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authorAlex Beregszaszi <alex@rtfs.hu>2003-12-08 17:54:40 +0000
committerAlex Beregszaszi <alex@rtfs.hu>2003-12-08 17:54:40 +0000
commitf0a93eb0b2e531c7bd759bd49cf68f907622e767 (patch)
tree309f6ded26bd51107bd4d6f41c8830c16e88bbbc
parent4250dafc961b53aaba41c7bb48e765cff1f284c4 (diff)
downloadffmpeg-f0a93eb0b2e531c7bd759bd49cf68f907622e767.tar.gz
msb pts support
Originally committed as revision 2576 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--libavformat/nut.c63
1 files changed, 49 insertions, 14 deletions
diff --git a/libavformat/nut.c b/libavformat/nut.c
index 4a0d9418de..09475946f3 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -50,6 +50,8 @@ typedef struct {
int curr_frame_start;
int last_frame_size;
int curr_frame_size;
+ int *msb_timestamp_shift;
+ int64_t *last_msb_timestamp;
} NUTContext;
static int bytes_left(ByteIOContext *bc)
@@ -234,6 +236,11 @@ static int nut_write_header(AVFormatContext *s)
update_packetheader(nut, bc, 0);
+ nut->msb_timestamp_shift =
+ av_mallocz(sizeof(nut->msb_timestamp_shift)*s->nb_streams);
+ nut->last_msb_timestamp =
+ av_mallocz(sizeof(nut->last_msb_timestamp)*s->nb_streams);
+
/* stream headers */
for (i = 0; i < s->nb_streams; i++)
{
@@ -272,7 +279,8 @@ static int nut_write_header(AVFormatContext *s)
put_v(bc, 0); /* no language code */
put_v(bc, nom);
put_v(bc, denom);
- put_v(bc, 0); /* msb timestamp_shift */
+ nut->msb_timestamp_shift[i] = 0;
+ put_v(bc, nut->msb_timestamp_shift[i]);
put_v(bc, 0); /* shuffle type */
put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
@@ -344,31 +352,45 @@ static int nut_write_packet(AVFormatContext *s, int stream_index,
{
NUTContext *nut = s->priv_data;
ByteIOContext *bc = &s->pb;
- int key_frame = 0;
- int flags;
+ int key_frame = 0, flags, msb_pts = 0;
AVCodecContext *enc;
+ int64_t lsb_pts;
if (stream_index > s->nb_streams)
return 1;
enc = &s->streams[stream_index]->codec;
- key_frame = enc->coded_frame->key_frame;
+ // FIXME, lavc reports always keyframes for audio, which will make
+ // _huge_ overhead
+ if (enc->codec_type == CODEC_TYPE_VIDEO)
+ key_frame = enc->coded_frame->key_frame;
+
+ if (key_frame /*||
+ ((pts - (nut->last_msb_timestamp[stream_index] <<
+ nut->msb_timestamp_shift[stream_index])) > 1024)*/)
+ {
+ msb_pts = 1;
+ nut->last_msb_timestamp[stream_index] = pts >> nut->msb_timestamp_shift[stream_index];
+ }
- if (key_frame)
- put_be64(bc, KEYFRAME_STARTCODE);
+ lsb_pts = pts - (nut->last_msb_timestamp[stream_index] << nut->msb_timestamp_shift[stream_index]);
flags=0;
flags<<=2; flags|=1; //priority
flags<<=1; flags|=0; //checksum
- flags<<=1; flags|=0; //msb_timestamp_flag
+ flags<<=1; flags|=msb_pts; //msb_timestamp_flag
flags<<=2; flags|=1; //subpacket_type
flags<<=1; flags|=0; //reserved
+ if (key_frame)
+ put_be64(bc, KEYFRAME_STARTCODE);
put_byte(bc, flags);
put_packetheader(nut, bc, size+20);
put_v(bc, stream_index);
- put_s(bc, pts); /* lsb_timestamp */
+ if (msb_pts)
+ put_v(bc, nut->last_msb_timestamp[stream_index]);
+ put_v(bc, lsb_pts); /* lsb_timestamp */
update_packetheader(nut, bc, size);
put_buffer(bc, buf, size);
@@ -380,6 +402,7 @@ static int nut_write_packet(AVFormatContext *s, int stream_index,
static int nut_write_trailer(AVFormatContext *s)
{
+ NUTContext *nut = s->priv_data;
ByteIOContext *bc = &s->pb;
#if 0
int i;
@@ -398,6 +421,11 @@ static int nut_write_trailer(AVFormatContext *s)
#endif
put_flush_packet(bc);
+
+ if (nut->last_msb_timestamp)
+ av_free(nut->last_msb_timestamp);
+ if (nut->msb_timestamp_shift)
+ av_free(nut->msb_timestamp_shift);
return 0;
}
@@ -439,6 +467,11 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_be32(bc); /* checkusm */
s->bit_rate = 0;
+
+ nut->msb_timestamp_shift =
+ av_malloc(sizeof(nut->msb_timestamp_shift)*s->nb_streams);
+ nut->last_msb_timestamp =
+ av_malloc(sizeof(nut->last_msb_timestamp)*s->nb_streams);
/* stream header */
for (cur_stream = 0; cur_stream < nb_streams; cur_stream++)
@@ -477,7 +510,7 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_b(bc, NULL, 0); /* language code */
nom = get_v(bc);
denom = get_v(bc);
- get_v(bc); /* FIXME: msb timestamp base */
+ nut->msb_timestamp_shift[cur_stream] = get_v(bc);
get_v(bc); /* shuffle type */
get_byte(bc); /* flags */
@@ -512,10 +545,10 @@ static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
{
NUTContext *nut = s->priv_data;
ByteIOContext *bc = &s->pb;
- int id, timestamp, size;
+ int id, size;
int key_frame = 0;
uint64_t tmp;
-
+ int64_t pts = 0;
if (url_feof(bc))
return -1;
@@ -540,10 +573,12 @@ static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
fprintf(stderr, "sanity check failed!\n");
#endif
id = get_v(bc);
- timestamp = get_s(bc);
+ if ((tmp & 0x8) >> 3)
+ pts = get_v(bc) << nut->msb_timestamp_shift[id];
+ pts += get_v(bc);
size = (nut->curr_frame_size - (url_ftell(bc)-nut->curr_frame_start));
- dprintf("flags: 0x%Lx, timestamp: %d, packet size: %d\n", tmp, timestamp, size);
+ dprintf("flags: 0x%llx, timestamp: %llx, packet size: %d\n", tmp, pts, size);
if (size < 0)
return -1;
@@ -553,7 +588,7 @@ static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->stream_index = id;
if (key_frame)
pkt->flags |= PKT_FLAG_KEY;
- pkt->pts = timestamp;
+ pkt->pts = pts;
return 0;
}