From: Hendrik Leppkes <[email protected]> The fourth substream is being discarded, since its not raw audio data, but an encoded Atmos stream which needs a specialized decoder.
Signed-off-by: Luca Barbato <[email protected]> --- As asked by Felix. libavcodec/mlp.h | 2 +- libavcodec/mlpdec.c | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/libavcodec/mlp.h b/libavcodec/mlp.h index 5a4ee5f..8a1584e 100644 --- a/libavcodec/mlp.h +++ b/libavcodec/mlp.h @@ -45,7 +45,7 @@ /** Maximum number of substreams that can be decoded. * MLP's limit is 2. TrueHD supports at least up to 3. */ -#define MAX_SUBSTREAMS 3 +#define MAX_SUBSTREAMS 4 /** which multiple of 48000 the maximum sample rate is */ #define MAX_RATEFACTOR 4 diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c index 624efc1..17f188f 100644 --- a/libavcodec/mlpdec.c +++ b/libavcodec/mlpdec.c @@ -350,7 +350,9 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb) m->access_unit_size_pow2 = mh.access_unit_size_pow2; m->num_substreams = mh.num_substreams; - m->max_decoded_substream = m->num_substreams - 1; + /* limit to decoding 3 substreams, as the 4th is used by + * Dolby Atmos for non-audio data */ + m->max_decoded_substream = FFMIN(m->num_substreams - 1, 2); m->avctx->sample_rate = mh.group1_samplerate; m->avctx->frame_size = mh.access_unit_size; -- 2.1.0 _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
