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libfdk-aacdec: Make sure decoding doesn't add any extra delay in the latest version of fdk-aac

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The latest version added support for a new option for enabling
a signal level limiter, which adds some extra delay. In fdk-aac, this
is enabled by default, but disable it by default here since we'd rather
have zero-delay decoding.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2015-01-07 23:49:41 +02:00
parent 3852e2c926
commit 2dbd35b00c
1 changed files with 11 additions and 0 deletions
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11
libavcodec/libfdk-aacdec.c
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@ -49,6 +49,7 @@ typedef struct FDKAACDecContext {
int drc_boost;
int drc_heavy;
int drc_cut;
int level_limit;
} FDKAACDecContext;
@ -71,6 +72,9 @@ static const AVOption fdk_aac_dec_options[] = {
OFFSET(drc_level), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 127, AD, NULL },
{ "drc_heavy", "Dynamic Range Control: heavy compression, where [1] is on (RF mode) and [0] is off",
OFFSET(drc_heavy), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 1, AD, NULL },
#ifdef AACDECODER_LIB_VL0
{ "level_limit", "Signal level limiting", OFFSET(level_limit), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, 1, AD },
#endif
{ NULL }
};
@ -292,6 +296,13 @@ static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
}
}
#ifdef AACDECODER_LIB_VL0
if (aacDecoder_SetParam(s->handle, AAC_PCM_LIMITER_ENABLE, s->level_limit) != AAC_DEC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set in signal level limiting in the decoder\n");
return AVERROR_UNKNOWN;
}
#endif
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
return 0;