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rtpdec: Split mpegts parsing to a normal depacketizer

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This gets rid of a number of special cases from the common rtpdec
code.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-01-17 14:34:59 +02:00
parent d5bb8cc2dd
commit 2326558d52
6 changed files with 131 additions and 55 deletions
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1
libavformat/Makefile
View File

@ -35,6 +35,7 @@ OBJS-$(CONFIG_RTPDEC) += rdt.o \
rtpdec_jpeg.o \
rtpdec_latm.o \
rtpdec_mpeg4.o \
rtpdec_mpegts.o \
rtpdec_qcelp.o \
rtpdec_qdm2.o \
rtpdec_qt.o \

56
libavformat/rtpdec.c
View File

@ -24,7 +24,6 @@
#include "libavutil/time.h"
#include "libavcodec/get_bits.h"
#include "avformat.h"
#include "mpegts.h"
#include "network.h"
#include "srtp.h"
#include "url.h"
@ -76,6 +75,7 @@ void av_register_rtp_dynamic_payload_handlers(void)
ff_register_dynamic_payload_handler(&ff_mp4a_latm_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_mp4v_es_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_mpeg4_generic_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_mpegts_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_qcelp_dynamic_handler);
@ -481,8 +481,7 @@ int ff_rtp_send_rtcp_feedback(RTPDemuxContext *s, URLContext *fd,
/**
* open a new RTP parse context for stream 'st'. 'st' can be NULL for
* MPEG2-TS streams to indicate that they should be demuxed inside the
* rtp demux (otherwise AV_CODEC_ID_MPEG2TS packets are returned)
* MPEG2-TS streams.
*/
RTPDemuxContext *ff_rtp_parse_open(AVFormatContext *s1, AVStream *st,
int payload_type, int queue_size)
@ -499,13 +498,7 @@ RTPDemuxContext *ff_rtp_parse_open(AVFormatContext *s1, AVStream *st,
s->st = st;
s->queue_size = queue_size;
rtp_init_statistics(&s->statistics, 0);
if (!strcmp(ff_rtp_enc_name(payload_type), "MP2T")) {
s->ts = ff_mpegts_parse_open(s->ic);
if (s->ts == NULL) {
av_free(s);
return NULL;
}
} else if (st) {
if (st) {
switch (st->codec->codec_id) {
case AV_CODEC_ID_MPEG1VIDEO:
case AV_CODEC_ID_MPEG2VIDEO:
@ -591,7 +584,7 @@ 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 payload_type, seq, flags = 0;
int ext;
AVStream *st;
uint32_t timestamp;
@ -645,26 +638,11 @@ static int rtp_parse_packet_internal(RTPDemuxContext *s, AVPacket *pkt,
buf += ext;
}
if (!st) {
/* specific MPEG2-TS 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 AVERROR(EAGAIN);
if (ret < len) {
s->read_buf_size = FFMIN(len - ret, sizeof(s->buf));
memcpy(s->buf, buf + ret, s->read_buf_size);
s->read_buf_index = 0;
return 1;
}
return 0;
} else if (s->handler && s->handler->parse_packet) {
if (s->handler && s->handler->parse_packet) {
rv = s->handler->parse_packet(s->ic, s->dynamic_protocol_context,
s->st, pkt, &timestamp, buf, len, seq,
flags);
} else {
} else if (st) {
/* At this point, the RTP header has been stripped;
* This is ASSUMING that there is only 1 CSRC, which isn't wise. */
switch (st->codec->codec_id) {
@ -704,6 +682,8 @@ static int rtp_parse_packet_internal(RTPDemuxContext *s, AVPacket *pkt,
}
pkt->stream_index = st->index;
} else {
return AVERROR(EINVAL);
}
// now perform timestamp things....
@ -786,7 +766,7 @@ 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;
int flags = 0;
uint32_t timestamp;
int rv = 0;
@ -797,7 +777,7 @@ static int rtp_parse_one_packet(RTPDemuxContext *s, AVPacket *pkt,
if (s->prev_ret <= 0)
return rtp_parse_queued_packet(s, pkt);
/* return the next packets, if any */
if (s->st && s->handler && s->handler->parse_packet) {
if (s->handler && s->handler->parse_packet) {
/* timestamp should be overwritten by parse_packet, if not,
* the packet is left with pts == AV_NOPTS_VALUE */
timestamp = RTP_NOTS_VALUE;
@ -806,19 +786,6 @@ static int rtp_parse_one_packet(RTPDemuxContext *s, AVPacket *pkt,
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;
}
}
@ -894,9 +861,6 @@ int ff_rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
void ff_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);
}
ff_srtp_free(&s->srtp);
av_free(s);
}

6
libavformat/rtpdec.h
View File

@ -160,9 +160,6 @@ struct RTPDemuxContext {
int64_t unwrapped_timestamp;
int64_t range_start_offset;
int max_payload_size;
struct MpegTSContext *ts; /* only used for MP2T payloads */
int read_buf_index;
int read_buf_size;
/* used to send back RTCP RR */
char hostname[256];
@ -192,9 +189,6 @@ struct RTPDemuxContext {
unsigned int last_octet_count;
int64_t last_feedback_time;
/* buffer for partially parsed packets */
uint8_t buf[RTP_MAX_PACKET_LENGTH];
/* dynamic payload stuff */
const RTPDynamicProtocolHandler *handler;
PayloadContext *dynamic_protocol_context;

1
libavformat/rtpdec_formats.h
View File

@ -50,6 +50,7 @@ extern RTPDynamicProtocolHandler ff_jpeg_dynamic_handler;
extern RTPDynamicProtocolHandler ff_mp4a_latm_dynamic_handler;
extern RTPDynamicProtocolHandler ff_mp4v_es_dynamic_handler;
extern RTPDynamicProtocolHandler ff_mpeg4_generic_dynamic_handler;
extern RTPDynamicProtocolHandler ff_mpegts_dynamic_handler;
extern RTPDynamicProtocolHandler ff_ms_rtp_asf_pfa_handler;
extern RTPDynamicProtocolHandler ff_ms_rtp_asf_pfv_handler;
extern RTPDynamicProtocolHandler ff_qcelp_dynamic_handler;

106
libavformat/rtpdec_mpegts.c Normal file
View File

@ -0,0 +1,106 @@
/*
* RTP MPEG2TS depacketizer
* Copyright (c) 2003 Fabrice Bellard
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mpegts.h"
#include "rtpdec_formats.h"
struct PayloadContext {
struct MpegTSContext *ts;
int read_buf_index;
int read_buf_size;
uint8_t buf[RTP_MAX_PACKET_LENGTH];
};
static PayloadContext *mpegts_new_context(void)
{
return av_mallocz(sizeof(PayloadContext));
}
static void mpegts_free_context(PayloadContext *data)
{
if (!data)
return;
if (data->ts)
ff_mpegts_parse_close(data->ts);
av_free(data);
}
static int mpegts_init(AVFormatContext *ctx, int st_index, PayloadContext *data)
{
data->ts = ff_mpegts_parse_open(ctx);
if (!data->ts)
return AVERROR(ENOMEM);
return 0;
}
static int mpegts_handle_packet(AVFormatContext *ctx, PayloadContext *data,
AVStream *st, AVPacket *pkt, uint32_t *timestamp,
const uint8_t *buf, int len, uint16_t seq,
int flags)
{
int ret;
// We don't want to use the RTP timestamps at all. If the mpegts demuxer
// doesn't set any pts/dts, the generic rtpdec code shouldn't try to
// fill it in either, since the mpegts and RTP timestamps are in totally
// different ranges.
*timestamp = RTP_NOTS_VALUE;
if (!data->ts)
return AVERROR(EINVAL);
if (!buf) {
if (data->read_buf_index >= data->read_buf_size)
return AVERROR(EAGAIN);
ret = ff_mpegts_parse_packet(data->ts, pkt, data->buf + data->read_buf_index,
data->read_buf_size - data->read_buf_index);
if (ret < 0)
return AVERROR(EAGAIN);
data->read_buf_index += ret;
if (data->read_buf_index < data->read_buf_size)
return 1;
else
return 0;
}
ret = ff_mpegts_parse_packet(data->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 AVERROR(EAGAIN);
if (ret < len) {
data->read_buf_size = FFMIN(len - ret, sizeof(data->buf));
memcpy(data->buf, buf + ret, data->read_buf_size);
data->read_buf_index = 0;
return 1;
}
return 0;
}
RTPDynamicProtocolHandler ff_mpegts_dynamic_handler = {
.codec_type = AVMEDIA_TYPE_DATA,
.parse_packet = mpegts_handle_packet,
.alloc = mpegts_new_context,
.init = mpegts_init,
.free = mpegts_free_context,
.static_payload_id = 33,
};

16
libavformat/rtsp.c
View File

@ -180,7 +180,8 @@ static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
{
if (!handler)
return;
codec->codec_id = handler->codec_id;
if (codec)
codec->codec_id = handler->codec_id;
rtsp_st->dynamic_handler = handler;
if (handler->alloc) {
rtsp_st->dynamic_protocol_context = handler->alloc();
@ -382,8 +383,17 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
/* no corresponding stream */
if (rt->transport == RTSP_TRANSPORT_RAW && !rt->ts && CONFIG_RTPDEC)
rt->ts = ff_mpegts_parse_open(s);
if (rt->transport == RTSP_TRANSPORT_RAW) {
if (!rt->ts && CONFIG_RTPDEC)
rt->ts = ff_mpegts_parse_open(s);
} else {
RTPDynamicProtocolHandler *handler;
handler = ff_rtp_handler_find_by_id(
rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
init_rtp_handler(handler, rtsp_st, NULL);
if (handler && handler->init)
handler->init(s, -1, rtsp_st->dynamic_protocol_context);
}
} else if (rt->server_type == RTSP_SERVER_WMS &&
codec_type == AVMEDIA_TYPE_DATA) {
/* RTX stream, a stream that carries all the other actual