/*
* RTP packetization for MPEG video
- * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2002 Fabrice Bellard
+ * Copyright (c) 2007 Luca Abeni
*
* This file is part of FFmpeg.
*
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavcodec/mpegvideo.h"
#include "avformat.h"
-#include "rtp_internal.h"
+#include "rtpenc.h"
/* NOTE: a single frame must be passed with sequence header if
needed. XXX: use slices. */
void ff_rtp_send_mpegvideo(AVFormatContext *s1, const uint8_t *buf1, int size)
{
- RTPDemuxContext *s = s1->priv_data;
- AVStream *st = s1->streams[0];
+ RTPMuxContext *s = s1->priv_data;
int len, h, max_packet_size;
- int b=1, e=0;
uint8_t *q;
+ const uint8_t *end = buf1 + size;
+ int begin_of_slice, end_of_slice, frame_type, temporal_reference;
max_packet_size = s->max_payload_size;
+ begin_of_slice = 1;
+ end_of_slice = 0;
+ frame_type = 0;
+ temporal_reference = 0;
while (size > 0) {
+ int begin_of_sequence;
+
+ begin_of_sequence = 0;
len = max_packet_size - 4;
if (len >= size) {
len = size;
- e = 1;
+ end_of_slice = 1;
+ } else {
+ const uint8_t *r, *r1;
+ int start_code;
+
+ r1 = buf1;
+ while (1) {
+ start_code = -1;
+ r = ff_find_start_code(r1, end, &start_code);
+ if((start_code & 0xFFFFFF00) == 0x100) {
+ /* New start code found */
+ if (start_code == 0x100) {
+ frame_type = (r[1] & 0x38) >> 3;
+ temporal_reference = (int)r[0] << 2 | r[1] >> 6;
+ }
+ if (start_code == 0x1B8) {
+ begin_of_sequence = 1;
+ }
+
+ if (r - buf1 - 4 <= len) {
+ /* The current slice fits in the packet */
+ if (begin_of_slice == 0) {
+ /* no slice at the beginning of the packet... */
+ end_of_slice = 1;
+ len = r - buf1 - 4;
+ break;
+ }
+ r1 = r;
+ } else {
+ if ((r1 - buf1 > 4) && (r - r1 < max_packet_size)) {
+ len = r1 - buf1 - 4;
+ end_of_slice = 1;
+ }
+ break;
+ }
+ } else {
+ break;
+ }
+ }
}
h = 0;
- h |= b << 12;
- h |= e << 11;
-
-// if (st->codec->sub_id == 2)
-// h |= 1 << 26; /* mpeg 2 indicator */
+ h |= temporal_reference << 16;
+ h |= begin_of_sequence << 13;
+ h |= begin_of_slice << 12;
+ h |= end_of_slice << 11;
+ h |= frame_type << 8;
q = s->buf;
*q++ = h >> 24;
*q++ = h >> 8;
*q++ = h;
-/* if (st->codec->sub_id == 2) {
- h = 0;
- *q++ = h >> 24;
- *q++ = h >> 16;
- *q++ = h >> 8;
- *q++ = h;
- } */
-
memcpy(q, buf1, len);
q += len;
- /* 90 KHz time stamp */
- s->timestamp = s->base_timestamp +
- av_rescale((int64_t)s->cur_timestamp * st->codec->time_base.num, 90000, st->codec->time_base.den); //FIXME pass timestamps
+ /* 90kHz time stamp */
+ s->timestamp = s->cur_timestamp;
ff_rtp_send_data(s1, s->buf, q - s->buf, (len == size));
buf1 += len;
size -= len;
+ begin_of_slice = end_of_slice;
+ end_of_slice = 0;
}
- s->cur_timestamp++;
}