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RTSP: Decouple MPEG-4 and AAC specific parts from rtsp.c 

Patch by Josh Allmann, joshua dot allmann at gmail

Originally committed as revision 23769 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Josh Allmann 2010-06-25 07:58:38 +00:00 committed by Martin Storsjö
parent 30619e6e59
commit 9b3788efc3
5 changed files with 168 additions and 63 deletions
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1
libavformat/Makefile
View File

@ -228,6 +228,7 @@ OBJS-$(CONFIG_SDP_DEMUXER) += rtsp.o \
rtpdec_asf.o \
rtpdec_h263.o \
rtpdec_h264.o \
rtpdec_mpeg4.o \
rtpdec_xiph.o
OBJS-$(CONFIG_SEGAFILM_DEMUXER) += segafilm.o
OBJS-$(CONFIG_SHORTEN_DEMUXER) += raw.o id3v2.o

8
libavformat/rtpdec.c
View File

@ -34,6 +34,7 @@
#include "rtpdec_asf.h"
#include "rtpdec_h263.h"
#include "rtpdec_h264.h"
#include "rtpdec_mpeg4.h"
#include "rtpdec_xiph.h"
//#define DEBUG
@ -50,9 +51,6 @@
/* statistics functions */
RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler= NULL;
static RTPDynamicProtocolHandler mp4v_es_handler= {"MP4V-ES", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG4};
static RTPDynamicProtocolHandler mpeg4_generic_handler= {"mpeg4-generic", AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC};
void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
{
handler->next= RTPFirstDynamicPayloadHandler;
@ -61,8 +59,8 @@ void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
void av_register_rtp_dynamic_payload_handlers(void)
{
ff_register_dynamic_payload_handler(&mp4v_es_handler);
ff_register_dynamic_payload_handler(&mpeg4_generic_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_amr_nb_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_amr_wb_dynamic_handler);
ff_register_dynamic_payload_handler(&ff_h263_1998_dynamic_handler);

125
libavformat/rtpdec_mpeg4.c Normal file
View File

@ -0,0 +1,125 @@
/**
* Common code for the RTP depacketization of MPEG-4 formats.
* Copyright (c) 2010 Fabrice Bellard
* Romain Degez
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @brief MPEG4 / RTP Code
* @author Fabrice Bellard
* @author Romain Degez
*/
#include "rtpdec_mpeg4.h"
#include "internal.h"
#include "libavutil/avstring.h"
/* return the length and optionally the data */
static int hex_to_data(uint8_t *data, const char *p)
{
int c, len, v;
len = 0;
v = 1;
for (;;) {
p += strspn(p, SPACE_CHARS);
if (*p == '\0')
break;
c = toupper((unsigned char) *p++);
if (c >= '0' && c <= '9')
c = c - '0';
else if (c >= 'A' && c <= 'F')
c = c - 'A' + 10;
else
break;
v = (v << 4) | c;
if (v & 0x100) {
if (data)
data[len] = v;
len++;
v = 1;
}
}
return len;
}
static int parse_fmtp_config(AVCodecContext * codec, char *value)
{
/* decode the hexa encoded parameter */
int len = hex_to_data(NULL, value);
if (codec->extradata)
av_free(codec->extradata);
codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
if (!codec->extradata)
return AVERROR(ENOMEM);
codec->extradata_size = len;
hex_to_data(codec->extradata, value);
return 0;
}
static int parse_sdp_line(AVFormatContext *s, int st_index,
PayloadContext *data, const char *line)
{
const char *p;
char value[4096], attr[25];
int res = 0;
AVCodecContext* codec = s->streams[st_index]->codec;
if (av_strstart(line, "fmtp:", &p)) {
// remove protocol identifier
while (*p && *p == ' ') p++; // strip spaces
while (*p && *p != ' ') p++; // eat protocol identifier
while (*p && *p == ' ') p++; // strip trailing spaces
while (ff_rtsp_next_attr_and_value(&p,
attr, sizeof(attr),
value, sizeof(value))) {
if (!strcmp(attr, "config")) {
res = parse_fmtp_config(codec, value);
if (res < 0)
return res;
}
}
}
return 0;
}
RTPDynamicProtocolHandler ff_mp4v_es_dynamic_handler = {
.enc_name = "MP4V-ES",
.codec_type = AVMEDIA_TYPE_VIDEO,
.codec_id = CODEC_ID_MPEG4,
.parse_sdp_a_line = parse_sdp_line,
.open = NULL,
.close = NULL,
.parse_packet = NULL
};
RTPDynamicProtocolHandler ff_mpeg4_generic_dynamic_handler = {
.enc_name = "mpeg4-generic",
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = CODEC_ID_AAC,
.parse_sdp_a_line = parse_sdp_line,
.open = NULL,
.close = NULL,
.parse_packet = NULL
};

39
libavformat/rtpdec_mpeg4.h Normal file
View File

@ -0,0 +1,39 @@
/**
* Common code for the RTP depacketization of MPEG-4 formats.
* Copyright (c) 2010 Fabrice Bellard
* Romain Degez
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_RTPDEC_MPEG4_H
#define AVFORMAT_RTPDEC_MPEG4_H
#include "rtpdec.h"
/**
* MPEG-4 Video RTP callbacks. (RFC 3016)
*/
extern RTPDynamicProtocolHandler ff_mp4v_es_dynamic_handler;
/**
* AAC RTP callbacks. (RFC 3640)
*/
extern RTPDynamicProtocolHandler ff_mpeg4_generic_dynamic_handler;
#endif /* AVFORMAT_RTPDEC_MPEG4_H */

58
libavformat/rtsp.c
View File

@ -158,59 +158,6 @@ static int sdp_parse_rtpmap(AVFormatContext *s,
return 0;
}
/* return the length and optionally the data */
static int hex_to_data(uint8_t *data, const char *p)
{
int c, len, v;
len = 0;
v = 1;
for (;;) {
p += strspn(p, SPACE_CHARS);
if (*p == '\0')
break;
c = toupper((unsigned char) *p++);
if (c >= '0' && c <= '9')
c = c - '0';
else if (c >= 'A' && c <= 'F')
c = c - 'A' + 10;
else
break;
v = (v << 4) | c;
if (v & 0x100) {
if (data)
data[len] = v;
len++;
v = 1;
}
}
return len;
}
static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
char *attr, char *value)
{
switch (codec->codec_id) {
case CODEC_ID_MPEG4:
case CODEC_ID_AAC:
if (!strcmp(attr, "config")) {
/* decode the hexa encoded parameter */
int len = hex_to_data(NULL, value);
if (codec->extradata)
av_free(codec->extradata);
codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
if (!codec->extradata)
return;
codec->extradata_size = len;
hex_to_data(codec->extradata, value);
}
break;
default:
break;
}
return;
}
typedef struct {
const char *str;
uint16_t type;
@ -263,16 +210,11 @@ static void sdp_parse_fmtp(AVStream *st, const char *p)
char value[4096];
int i;
RTSPStream *rtsp_st = st->priv_data;
AVCodecContext *codec = st->codec;
RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
/* loop on each attribute */
while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
value, sizeof(value))) {
/* grab the codec extra_data from the config parameter of the fmtp
* line */
sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
attr, value);
/* Looking for a known attribute */
for (i = 0; attr_names[i].str; ++i) {
if (!strcasecmp(attr, attr_names[i].str)) {