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libavformat/rtpdec_opus: add fmtp parsing of sprop-maxcapturerate

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Co-authored-by: Marvin Scholz <epirat07@gmail.com>
Signed-off-by: Marvin Scholz <epirat07@gmail.com>
This commit is contained in:
Erik Linge
2022-09-26 21:51:31 +02:00
committed by Marvin Scholz
parent 2a180c7150
commit f566392f66
1 changed files with 34 additions and 0 deletions
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34
libavformat/rtpdec_opus.c
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@@ -1,6 +1,7 @@
/*
* RTP Depacketization of Opus, RFC 7587
* Copyright (c) 2025 Jonathan Baudanza <jon@jonb.org>
* Copyright (c) 2022 Erik Linge
*
* This file is part of FFmpeg.
*
@@ -21,6 +22,7 @@
#include "libavcodec/bytestream.h"
#include "libavutil/mem.h"
#include "libavutil/avstring.h"
#include "rtpdec_formats.h"
#include "internal.h"
@@ -108,10 +110,42 @@ static int opus_parse_packet(AVFormatContext *ctx, PayloadContext *data,
return 0;
}
static int parse_fmtp(AVFormatContext *s,
AVStream *stream, PayloadContext *data,
const char *attr, const char *value)
{
if (!strcmp(attr, "sprop-maxcapturerate")) {
int rate = atoi(value);
if (rate < 8000 || rate > 48000) {
av_log(s, AV_LOG_ERROR,
"fmtp field 'sprop-maxcapturerate' must be between 8000 to 48000 (provided value: %s)",
value);
return AVERROR_INVALIDDATA;
}
stream->codecpar->sample_rate = rate;
}
return 0;
}
static int opus_parse_sdp_line(AVFormatContext *s, int st_index,
PayloadContext *data, const char *line)
{
const char *p;
if (st_index < 0)
return 0;
if (av_strstart(line, "fmtp:", &p)) {
return ff_parse_fmtp(s, s->streams[st_index], data, p, parse_fmtp);
}
return 0;
}
const RTPDynamicProtocolHandler ff_opus_dynamic_handler = {
.enc_name = "opus",
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_OPUS,
.parse_packet = opus_parse_packet,
.init = opus_init,
.parse_sdp_a_line = opus_parse_sdp_line,
};