This makes it easier for receivers to decide what to do if data
is lost.
Refactor calculating the max payload size, to avoid hardcoding the
header size in too many places, reducing the number of lines that
have to be touched if the header is adjusted further.
---
libavformat/rtpenc.h | 2 ++
libavformat/rtpenc_vp8.c | 17 +++++++++++------
2 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/libavformat/rtpenc.h b/libavformat/rtpenc.h
index 369b413..5fd0b9c 100644
--- a/libavformat/rtpenc.h
+++ b/libavformat/rtpenc.h
@@ -59,6 +59,8 @@ struct RTPMuxContext {
int nal_length_size;
int flags;
+
+ unsigned int frame_count;
};
typedef struct RTPMuxContext RTPMuxContext;
diff --git a/libavformat/rtpenc_vp8.c b/libavformat/rtpenc_vp8.c
index 1730379..2c82c08 100644
--- a/libavformat/rtpenc_vp8.c
+++ b/libavformat/rtpenc_vp8.c
@@ -30,20 +30,25 @@ void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t
*buf, int size)
s->buf_ptr = s->buf;
s->timestamp = s->cur_timestamp;
- max_packet_size = s->max_payload_size - 1; // minus one for header byte
- // no extended control bits, reference frame, start of partition,
+ // extended control bit set, reference frame, start of partition,
// partition id 0
- *s->buf_ptr++ = 0x10;
+ *s->buf_ptr++ = 0x90;
+ *s->buf_ptr++ = 0x80; // Picture id present
+ *s->buf_ptr++ = s->frame_count++ & 0x7f;
+ // Calculate the number of remaining bytes
+ max_packet_size = s->buf + s->max_payload_size - s->buf_ptr;
+
while (size > 0) {
len = FFMIN(size, max_packet_size);
memcpy(s->buf_ptr, buf, len);
- ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is
last packet in frame
+ // marker bit is last packet in frame
+ ff_rtp_send_data(s1, s->buf, s->buf_ptr + len - s->buf, size == len);
size -= len;
buf += len;
- s->buf_ptr = s->buf;
- *s->buf_ptr++ = 0; // payload descriptor
+ // Clear the partition start bit, keep the rest of the header untouched
+ s->buf[0] &= ~0x10;
}
}
--
1.7.9.4
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