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avcodec/libopusenc: add option to set inband FEC

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This commit is contained in:
Gyan Doshi 2020-09-06 12:24:46 +05:30
parent 99e12b5736
commit 1e5b3f77d9
2 changed files with 14 additions and 0 deletions
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5
doc/encoders.texi
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@ -953,6 +953,11 @@ The default is 20ms.
@item packet_loss (@emph{expect-loss})
Set expected packet loss percentage. The default is 0.
@item fec (@emph{n/a})
Enable inband forward error correction. @option{packet_loss} must be non-zero
to take advantage - frequency of FEC 'side-data' is proportional to expected packet loss.
Default is disabled.
@item application (N.A.)
Set intended application type. Valid options are listed below:

9
libavcodec/libopusenc.c
View File

@ -34,6 +34,7 @@ typedef struct LibopusEncOpts {
int vbr;
int application;
int packet_loss;
int fec;
int complexity;
float frame_duration;
int packet_size;
@ -149,6 +150,13 @@ static int libopus_configure_encoder(AVCodecContext *avctx, OpusMSEncoder *enc,
"Unable to set expected packet loss percentage: %s\n",
opus_strerror(ret));
ret = opus_multistream_encoder_ctl(enc,
OPUS_SET_INBAND_FEC(opts->fec));
if (ret != OPUS_OK)
av_log(avctx, AV_LOG_WARNING,
"Unable to set inband FEC: %s\n",
opus_strerror(ret));
if (avctx->cutoff) {
ret = opus_multistream_encoder_ctl(enc,
OPUS_SET_MAX_BANDWIDTH(opts->max_bandwidth));
@ -544,6 +552,7 @@ static const AVOption libopus_options[] = {
{ "lowdelay", "Restrict to only the lowest delay modes", 0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_RESTRICTED_LOWDELAY }, 0, 0, FLAGS, "application" },
{ "frame_duration", "Duration of a frame in milliseconds", OFFSET(frame_duration), AV_OPT_TYPE_FLOAT, { .dbl = 20.0 }, 2.5, 120.0, FLAGS },
{ "packet_loss", "Expected packet loss percentage", OFFSET(packet_loss), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 100, FLAGS },
{ "fec", "Enable inband FEC. Expected packet loss must be non-zero", OFFSET(fec), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "vbr", "Variable bit rate mode", OFFSET(vbr), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 2, FLAGS, "vbr" },
{ "off", "Use constant bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "vbr" },
{ "on", "Use variable bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "vbr" },