#include "mpegts.h"
#include <unistd.h>
+#include <strings.h>
#include "network.h"
#include "rtpdec.h"
'url_open_dyn_packet_buf')
*/
+static RTPDynamicProtocolHandler ff_realmedia_mp3_dynamic_handler = {
+ .enc_name = "X-MP3-draft-00",
+ .codec_type = AVMEDIA_TYPE_AUDIO,
+ .codec_id = CODEC_ID_MP3ADU,
+};
+
/* statistics functions */
-RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler= NULL;
+static RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler= NULL;
void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
{
ff_register_dynamic_payload_handler(&ff_svq3_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_mp4a_latm_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_vp8_dynamic_handler);
+ ff_register_dynamic_payload_handler(&ff_qcelp_dynamic_handler);
+ ff_register_dynamic_payload_handler(&ff_realmedia_mp3_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_ms_rtp_asf_pfv_handler);
ff_register_dynamic_payload_handler(&ff_ms_rtp_asf_pfa_handler);
+
+ ff_register_dynamic_payload_handler(&ff_qt_rtp_aud_handler);
+ ff_register_dynamic_payload_handler(&ff_qt_rtp_vid_handler);
+ ff_register_dynamic_payload_handler(&ff_quicktime_rtp_aud_handler);
+ ff_register_dynamic_payload_handler(&ff_quicktime_rtp_vid_handler);
+}
+
+RTPDynamicProtocolHandler *ff_rtp_handler_find_by_name(const char *name,
+ enum AVMediaType codec_type)
+{
+ RTPDynamicProtocolHandler *handler;
+ for (handler = RTPFirstDynamicPayloadHandler;
+ handler; handler = handler->next)
+ if (!strcasecmp(name, handler->enc_name) &&
+ codec_type == handler->codec_type)
+ return handler;
+ return NULL;
+}
+
+RTPDynamicProtocolHandler *ff_rtp_handler_find_by_id(int id,
+ enum AVMediaType codec_type)
+{
+ RTPDynamicProtocolHandler *handler;
+ for (handler = RTPFirstDynamicPayloadHandler;
+ handler; handler = handler->next)
+ if (handler->static_payload_id && handler->static_payload_id == id &&
+ codec_type == handler->codec_type)
+ return handler;
+ return NULL;
}
static int rtcp_parse_packet(RTPDemuxContext *s, const unsigned char *buf, int len)
{
- if (buf[1] != 200)
- return -1;
- s->last_rtcp_ntp_time = AV_RB64(buf + 8);
- if (s->first_rtcp_ntp_time == AV_NOPTS_VALUE)
- s->first_rtcp_ntp_time = s->last_rtcp_ntp_time;
- s->last_rtcp_timestamp = AV_RB32(buf + 16);
- return 0;
+ int payload_len;
+ while (len >= 2) {
+ switch (buf[1]) {
+ case RTCP_SR:
+ if (len < 16) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid length for RTCP SR packet\n");
+ return AVERROR_INVALIDDATA;
+ }
+ payload_len = (AV_RB16(buf + 2) + 1) * 4;
+
+ s->last_rtcp_ntp_time = AV_RB64(buf + 8);
+ s->last_rtcp_timestamp = AV_RB32(buf + 16);
+ if (s->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
+ s->first_rtcp_ntp_time = s->last_rtcp_ntp_time;
+ if (!s->base_timestamp)
+ s->base_timestamp = s->last_rtcp_timestamp;
+ s->rtcp_ts_offset = s->last_rtcp_timestamp - s->base_timestamp;
+ }
+
+ buf += payload_len;
+ len -= payload_len;
+ break;
+ case RTCP_BYE:
+ return -RTCP_BYE;
+ default:
+ return -1;
+ }
+ }
+ return -1;
}
#define RTP_SEQ_MOD (1<<16)
int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
{
- ByteIOContext *pb;
+ AVIOContext *pb;
uint8_t *buf;
int len;
int rtcp_bytes;
return -1;
// Receiver Report
- put_byte(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
- put_byte(pb, 201);
- put_be16(pb, 7); /* length in words - 1 */
+ avio_w8(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
+ avio_w8(pb, RTCP_RR);
+ avio_wb16(pb, 7); /* length in words - 1 */
// our own SSRC: we use the server's SSRC + 1 to avoid conflicts
- put_be32(pb, s->ssrc + 1);
- put_be32(pb, s->ssrc); // server SSRC
+ avio_wb32(pb, s->ssrc + 1);
+ avio_wb32(pb, s->ssrc); // server SSRC
// some placeholders we should really fill...
// RFC 1889/p64
extended_max= stats->cycles + stats->max_seq;
fraction= (fraction<<24) | lost;
- put_be32(pb, fraction); /* 8 bits of fraction, 24 bits of total packets lost */
- put_be32(pb, extended_max); /* max sequence received */
- put_be32(pb, stats->jitter>>4); /* jitter */
+ avio_wb32(pb, fraction); /* 8 bits of fraction, 24 bits of total packets lost */
+ avio_wb32(pb, extended_max); /* max sequence received */
+ avio_wb32(pb, stats->jitter>>4); /* jitter */
if(s->last_rtcp_ntp_time==AV_NOPTS_VALUE)
{
- put_be32(pb, 0); /* last SR timestamp */
- put_be32(pb, 0); /* delay since last SR */
+ avio_wb32(pb, 0); /* last SR timestamp */
+ avio_wb32(pb, 0); /* delay since last SR */
} else {
uint32_t middle_32_bits= s->last_rtcp_ntp_time>>16; // this is valid, right? do we need to handle 64 bit values special?
uint32_t delay_since_last= ntp_time - s->last_rtcp_ntp_time;
- put_be32(pb, middle_32_bits); /* last SR timestamp */
- put_be32(pb, delay_since_last); /* delay since last SR */
+ avio_wb32(pb, middle_32_bits); /* last SR timestamp */
+ avio_wb32(pb, delay_since_last); /* delay since last SR */
}
// CNAME
- put_byte(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
- put_byte(pb, 202);
+ avio_w8(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
+ avio_w8(pb, RTCP_SDES);
len = strlen(s->hostname);
- put_be16(pb, (6 + len + 3) / 4); /* length in words - 1 */
- put_be32(pb, s->ssrc);
- put_byte(pb, 0x01);
- put_byte(pb, len);
- put_buffer(pb, s->hostname, len);
+ avio_wb16(pb, (6 + len + 3) / 4); /* length in words - 1 */
+ avio_wb32(pb, s->ssrc);
+ avio_w8(pb, 0x01);
+ avio_w8(pb, len);
+ avio_write(pb, s->hostname, len);
// padding
for (len = (6 + len) % 4; len % 4; len++) {
- put_byte(pb, 0);
+ avio_w8(pb, 0);
}
- put_flush_packet(pb);
+ avio_flush(pb);
len = url_close_dyn_buf(pb, &buf);
if ((len > 0) && buf) {
int result;
- dprintf(s->ic, "sending %d bytes of RR\n", len);
+ av_dlog(s->ic, "sending %d bytes of RR\n", len);
result= url_write(s->rtp_ctx, buf, len);
- dprintf(s->ic, "result from url_write: %d\n", result);
+ av_dlog(s->ic, "result from url_write: %d\n", result);
av_free(buf);
}
return 0;
void rtp_send_punch_packets(URLContext* rtp_handle)
{
- ByteIOContext *pb;
+ AVIOContext *pb;
uint8_t *buf;
int len;
if (url_open_dyn_buf(&pb) < 0)
return;
- put_byte(pb, (RTP_VERSION << 6));
- put_byte(pb, 0); /* Payload type */
- put_be16(pb, 0); /* Seq */
- put_be32(pb, 0); /* Timestamp */
- put_be32(pb, 0); /* SSRC */
+ avio_w8(pb, (RTP_VERSION << 6));
+ avio_w8(pb, 0); /* Payload type */
+ avio_wb16(pb, 0); /* Seq */
+ avio_wb32(pb, 0); /* Timestamp */
+ avio_wb32(pb, 0); /* SSRC */
- put_flush_packet(pb);
+ avio_flush(pb);
len = url_close_dyn_buf(pb, &buf);
if ((len > 0) && buf)
url_write(rtp_handle, buf, len);
if (url_open_dyn_buf(&pb) < 0)
return;
- put_byte(pb, (RTP_VERSION << 6));
- put_byte(pb, 201); /* receiver report */
- put_be16(pb, 1); /* length in words - 1 */
- put_be32(pb, 0); /* our own SSRC */
+ avio_w8(pb, (RTP_VERSION << 6));
+ avio_w8(pb, RTCP_RR); /* receiver report */
+ avio_wb16(pb, 1); /* length in words - 1 */
+ avio_wb32(pb, 0); /* our own SSRC */
- put_flush_packet(pb);
+ avio_flush(pb);
len = url_close_dyn_buf(pb, &buf);
if ((len > 0) && buf)
url_write(rtp_handle, buf, len);
* MPEG2TS streams to indicate that they should be demuxed inside the
* rtp demux (otherwise CODEC_ID_MPEG2TS packets are returned)
*/
-RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type)
+RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, int queue_size)
{
RTPDemuxContext *s;
s->first_rtcp_ntp_time = AV_NOPTS_VALUE;
s->ic = s1;
s->st = st;
+ s->queue_size = queue_size;
rtp_init_statistics(&s->statistics, 0); // do we know the initial sequence from sdp?
if (!strcmp(ff_rtp_enc_name(payload_type), "MP2T")) {
s->ts = ff_mpegts_parse_open(s->ic);
return NULL;
}
} else {
- av_set_pts_info(st, 32, 1, 90000);
switch(st->codec->codec_id) {
case CODEC_ID_MPEG1VIDEO:
case CODEC_ID_MPEG2VIDEO:
case CODEC_ID_H264:
st->need_parsing = AVSTREAM_PARSE_FULL;
break;
+ case CODEC_ID_ADPCM_G722:
+ /* According to RFC 3551, the stream clock rate is 8000
+ * even if the sample rate is 16000. */
+ if (st->codec->sample_rate == 8000)
+ st->codec->sample_rate = 16000;
+ break;
default:
- if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
- av_set_pts_info(st, 32, 1, st->codec->sample_rate);
- }
break;
}
}
*/
static void finalize_packet(RTPDemuxContext *s, AVPacket *pkt, uint32_t timestamp)
{
+ if (pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE)
+ return; /* Timestamp already set by depacketizer */
if (s->last_rtcp_ntp_time != AV_NOPTS_VALUE && timestamp != RTP_NOTS_VALUE) {
int64_t addend;
int delta_timestamp;
delta_timestamp = timestamp - s->last_rtcp_timestamp;
/* convert to the PTS timebase */
addend = av_rescale(s->last_rtcp_ntp_time - s->first_rtcp_ntp_time, s->st->time_base.den, (uint64_t)s->st->time_base.num << 32);
- pkt->pts = s->range_start_offset + addend + delta_timestamp;
+ pkt->pts = s->range_start_offset + s->rtcp_ts_offset + addend +
+ delta_timestamp;
+ return;
}
+ if (timestamp == RTP_NOTS_VALUE)
+ return;
+ if (!s->base_timestamp)
+ s->base_timestamp = timestamp;
+ pkt->pts = s->range_start_offset + timestamp - s->base_timestamp;
}
-/**
- * Parse an RTP or RTCP packet directly sent as a buffer.
- * @param s RTP parse context.
- * @param pkt returned packet
- * @param buf input buffer or NULL to read the next packets
- * @param len buffer len
- * @return 0 if a packet is returned, 1 if a packet is returned and more can follow
- * (use buf as NULL to read the next). -1 if no packet (error or no more packet).
- */
-int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
- const uint8_t *buf, int len)
+static int rtp_parse_packet_internal(RTPDemuxContext *s, AVPacket *pkt,
+ const uint8_t *buf, int len)
{
unsigned int ssrc, h;
int payload_type, seq, ret, flags = 0;
+ int ext;
AVStream *st;
uint32_t timestamp;
int rv= 0;
- if (!buf) {
- /* return the next packets, if any */
- if(s->st && s->parse_packet) {
- /* timestamp should be overwritten by parse_packet, if not,
- * the packet is left with pts == AV_NOPTS_VALUE */
- timestamp = RTP_NOTS_VALUE;
- rv= s->parse_packet(s->ic, s->dynamic_protocol_context,
- s->st, pkt, ×tamp, NULL, 0, flags);
- finalize_packet(s, pkt, timestamp);
- return rv;
- } else {
- // TODO: Move to a dynamic packet handler (like above)
- if (s->read_buf_index >= s->read_buf_size)
- return -1;
- ret = ff_mpegts_parse_packet(s->ts, pkt, s->buf + s->read_buf_index,
- s->read_buf_size - s->read_buf_index);
- if (ret < 0)
- return -1;
- s->read_buf_index += ret;
- if (s->read_buf_index < s->read_buf_size)
- return 1;
- else
- return 0;
- }
- }
-
- if (len < 12)
- return -1;
-
- if ((buf[0] & 0xc0) != (RTP_VERSION << 6))
- return -1;
- if (buf[1] >= 200 && buf[1] <= 204) {
- rtcp_parse_packet(s, buf, len);
- return -1;
- }
+ ext = buf[0] & 0x10;
payload_type = buf[1] & 0x7f;
if (buf[1] & 0x80)
flags |= RTP_FLAG_MARKER;
return -1;
}
+ if (buf[0] & 0x20) {
+ int padding = buf[len - 1];
+ if (len >= 12 + padding)
+ len -= padding;
+ }
+
s->seq = seq;
len -= 12;
buf += 12;
+ /* RFC 3550 Section 5.3.1 RTP Header Extension handling */
+ if (ext) {
+ if (len < 4)
+ return -1;
+ /* calculate the header extension length (stored as number
+ * of 32-bit words) */
+ ext = (AV_RB16(buf + 2) + 1) << 2;
+
+ if (len < ext)
+ return -1;
+ // skip past RTP header extension
+ len -= ext;
+ buf += ext;
+ }
+
if (!st) {
/* specific MPEG2TS demux support */
ret = ff_mpegts_parse_packet(s->ts, pkt, buf, len);
+ /* The only error that can be returned from ff_mpegts_parse_packet
+ * is "no more data to return from the provided buffer", so return
+ * AVERROR(EAGAIN) for all errors */
if (ret < 0)
- return -1;
+ return AVERROR(EAGAIN);
if (ret < len) {
s->read_buf_size = len - ret;
memcpy(s->buf, buf + ret, s->read_buf_size);
return rv;
}
+void ff_rtp_reset_packet_queue(RTPDemuxContext *s)
+{
+ while (s->queue) {
+ RTPPacket *next = s->queue->next;
+ av_free(s->queue->buf);
+ av_free(s->queue);
+ s->queue = next;
+ }
+ s->seq = 0;
+ s->queue_len = 0;
+ s->prev_ret = 0;
+}
+
+static void enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len)
+{
+ uint16_t seq = AV_RB16(buf + 2);
+ RTPPacket *cur = s->queue, *prev = NULL, *packet;
+
+ /* Find the correct place in the queue to insert the packet */
+ while (cur) {
+ int16_t diff = seq - cur->seq;
+ if (diff < 0)
+ break;
+ prev = cur;
+ cur = cur->next;
+ }
+
+ packet = av_mallocz(sizeof(*packet));
+ if (!packet)
+ return;
+ packet->recvtime = av_gettime();
+ packet->seq = seq;
+ packet->len = len;
+ packet->buf = buf;
+ packet->next = cur;
+ if (prev)
+ prev->next = packet;
+ else
+ s->queue = packet;
+ s->queue_len++;
+}
+
+static int has_next_packet(RTPDemuxContext *s)
+{
+ return s->queue && s->queue->seq == (uint16_t) (s->seq + 1);
+}
+
+int64_t ff_rtp_queued_packet_time(RTPDemuxContext *s)
+{
+ return s->queue ? s->queue->recvtime : 0;
+}
+
+static int rtp_parse_queued_packet(RTPDemuxContext *s, AVPacket *pkt)
+{
+ int rv;
+ RTPPacket *next;
+
+ if (s->queue_len <= 0)
+ return -1;
+
+ if (!has_next_packet(s))
+ av_log(s->st ? s->st->codec : NULL, AV_LOG_WARNING,
+ "RTP: missed %d packets\n", s->queue->seq - s->seq - 1);
+
+ /* Parse the first packet in the queue, and dequeue it */
+ rv = rtp_parse_packet_internal(s, pkt, s->queue->buf, s->queue->len);
+ next = s->queue->next;
+ av_free(s->queue->buf);
+ av_free(s->queue);
+ s->queue = next;
+ s->queue_len--;
+ return rv;
+}
+
+static int rtp_parse_one_packet(RTPDemuxContext *s, AVPacket *pkt,
+ uint8_t **bufptr, int len)
+{
+ uint8_t* buf = bufptr ? *bufptr : NULL;
+ int ret, flags = 0;
+ uint32_t timestamp;
+ int rv= 0;
+
+ if (!buf) {
+ /* If parsing of the previous packet actually returned 0 or an error,
+ * there's nothing more to be parsed from that packet, but we may have
+ * indicated that we can return the next enqueued packet. */
+ if (s->prev_ret <= 0)
+ return rtp_parse_queued_packet(s, pkt);
+ /* return the next packets, if any */
+ if(s->st && s->parse_packet) {
+ /* timestamp should be overwritten by parse_packet, if not,
+ * the packet is left with pts == AV_NOPTS_VALUE */
+ timestamp = RTP_NOTS_VALUE;
+ rv= s->parse_packet(s->ic, s->dynamic_protocol_context,
+ s->st, pkt, ×tamp, NULL, 0, flags);
+ finalize_packet(s, pkt, timestamp);
+ return rv;
+ } else {
+ // TODO: Move to a dynamic packet handler (like above)
+ if (s->read_buf_index >= s->read_buf_size)
+ return AVERROR(EAGAIN);
+ ret = ff_mpegts_parse_packet(s->ts, pkt, s->buf + s->read_buf_index,
+ s->read_buf_size - s->read_buf_index);
+ if (ret < 0)
+ return AVERROR(EAGAIN);
+ s->read_buf_index += ret;
+ if (s->read_buf_index < s->read_buf_size)
+ return 1;
+ else
+ return 0;
+ }
+ }
+
+ if (len < 12)
+ return -1;
+
+ if ((buf[0] & 0xc0) != (RTP_VERSION << 6))
+ return -1;
+ if (buf[1] >= RTCP_SR && buf[1] <= RTCP_APP) {
+ return rtcp_parse_packet(s, buf, len);
+ }
+
+ if ((s->seq == 0 && !s->queue) || s->queue_size <= 1) {
+ /* First packet, or no reordering */
+ return rtp_parse_packet_internal(s, pkt, buf, len);
+ } else {
+ uint16_t seq = AV_RB16(buf + 2);
+ int16_t diff = seq - s->seq;
+ if (diff < 0) {
+ /* Packet older than the previously emitted one, drop */
+ av_log(s->st ? s->st->codec : NULL, AV_LOG_WARNING,
+ "RTP: dropping old packet received too late\n");
+ return -1;
+ } else if (diff <= 1) {
+ /* Correct packet */
+ rv = rtp_parse_packet_internal(s, pkt, buf, len);
+ return rv;
+ } else {
+ /* Still missing some packet, enqueue this one. */
+ enqueue_packet(s, buf, len);
+ *bufptr = NULL;
+ /* Return the first enqueued packet if the queue is full,
+ * even if we're missing something */
+ if (s->queue_len >= s->queue_size)
+ return rtp_parse_queued_packet(s, pkt);
+ return -1;
+ }
+ }
+}
+
+/**
+ * Parse an RTP or RTCP packet directly sent as a buffer.
+ * @param s RTP parse context.
+ * @param pkt returned packet
+ * @param bufptr pointer to the input buffer or NULL to read the next packets
+ * @param len buffer len
+ * @return 0 if a packet is returned, 1 if a packet is returned and more can follow
+ * (use buf as NULL to read the next). -1 if no packet (error or no more packet).
+ */
+int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
+ uint8_t **bufptr, int len)
+{
+ int rv = rtp_parse_one_packet(s, pkt, bufptr, len);
+ s->prev_ret = rv;
+ while (rv == AVERROR(EAGAIN) && has_next_packet(s))
+ rv = rtp_parse_queued_packet(s, pkt);
+ return rv ? rv : has_next_packet(s);
+}
+
void rtp_parse_close(RTPDemuxContext *s)
{
+ ff_rtp_reset_packet_queue(s);
if (!strcmp(ff_rtp_enc_name(s->payload_type), "MP2T")) {
ff_mpegts_parse_close(s->ts);
}