ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinha...@outlook.com> | Sat Sep 17 23:13:05 2022 +0200| [a12338afe5192f23349c0fde8592891be230bfc3] | committer: Andreas Rheinhardt
avcodec/mlpenc: Simplify channel layout comparisons These encoders have AVCodec.ch_layouts set, so ff_encode_preinit() has already checked that the used channel layout is equivalent to one of these native layouts. Therefore one can simply compare the channel masks (with the added complication that one has to use av_channel_layout_subset() to get it, because the channel layout is not guaranteed to have AV_CHANNEL_ORDER_NATIVE). Reviewed-by: Paul B Mahol <one...@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a12338afe5192f23349c0fde8592891be230bfc3 --- libavcodec/mlpenc.c | 30 ++++++++++++++---------------- 1 file changed, 14 insertions(+), 16 deletions(-) diff --git a/libavcodec/mlpenc.c b/libavcodec/mlpenc.c index ac1f446313..18e8ce4579 100644 --- a/libavcodec/mlpenc.c +++ b/libavcodec/mlpenc.c @@ -480,6 +480,7 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx) static AVOnce init_static_once = AV_ONCE_INIT; MLPEncodeContext *ctx = avctx->priv_data; RestartHeader *const rh = &ctx->restart_header; + uint64_t channels_present; unsigned int sum = 0; size_t size; int ret; @@ -589,19 +590,20 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx) ctx->num_substreams = 1; // TODO: change this after adding multi-channel support for TrueHD + channels_present = av_channel_layout_subset(&avctx->ch_layout, ~(uint64_t)0); if (ctx->avctx->codec_id == AV_CODEC_ID_MLP) { - static const AVChannelLayout layout_arrangement[] = { - AV_CHANNEL_LAYOUT_MONO, AV_CHANNEL_LAYOUT_STEREO, - AV_CHANNEL_LAYOUT_2_1, AV_CHANNEL_LAYOUT_QUAD, - AV_CHANNEL_LAYOUT_2POINT1, { 0 }, { 0 }, - AV_CHANNEL_LAYOUT_SURROUND, AV_CHANNEL_LAYOUT_4POINT0, - AV_CHANNEL_LAYOUT_5POINT0_BACK, AV_CHANNEL_LAYOUT_3POINT1, - AV_CHANNEL_LAYOUT_4POINT1, AV_CHANNEL_LAYOUT_5POINT1_BACK, + static const uint64_t layout_arrangement[] = { + AV_CH_LAYOUT_MONO, AV_CH_LAYOUT_STEREO, + AV_CH_LAYOUT_2_1, AV_CH_LAYOUT_QUAD, + AV_CH_LAYOUT_2POINT1, 0, 0, + AV_CH_LAYOUT_SURROUND, AV_CH_LAYOUT_4POINT0, + AV_CH_LAYOUT_5POINT0_BACK, AV_CH_LAYOUT_3POINT1, + AV_CH_LAYOUT_4POINT1, AV_CH_LAYOUT_5POINT1_BACK, }; int i; for (i = 0; i < FF_ARRAY_ELEMS(layout_arrangement); i++) - if (!av_channel_layout_compare(&avctx->ch_layout, &layout_arrangement[i])) + if (channels_present == layout_arrangement[i]) break; if (i == FF_ARRAY_ELEMS(layout_arrangement)) { av_log(avctx, AV_LOG_ERROR, "Unsupported channel arrangement\n"); @@ -613,29 +615,25 @@ static av_cold int mlp_encode_init(AVCodecContext *avctx) ctx->summary_info = ff_mlp_ch_info[ctx->channel_arrangement].summary_info ; } else { /* TrueHD */ - if (!av_channel_layout_compare(&avctx->ch_layout, - &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO)) { + if (channels_present == AV_CH_LAYOUT_MONO) { ctx->ch_modifier_thd0 = 3; ctx->ch_modifier_thd1 = 3; ctx->ch_modifier_thd2 = 3; ctx->channel_arrangement = 2; ctx->thd_substream_info = 0x14; - } else if (!av_channel_layout_compare(&avctx->ch_layout, - &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) { + } else if (channels_present == AV_CH_LAYOUT_STEREO) { ctx->ch_modifier_thd0 = 1; ctx->ch_modifier_thd1 = 1; ctx->ch_modifier_thd2 = 1; ctx->channel_arrangement = 1; ctx->thd_substream_info = 0x14; - } else if (!av_channel_layout_compare(&avctx->ch_layout, - &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT0)) { + } else if (channels_present == AV_CH_LAYOUT_5POINT0) { ctx->ch_modifier_thd0 = 1; ctx->ch_modifier_thd1 = 1; ctx->ch_modifier_thd2 = 1; ctx->channel_arrangement = 11; ctx->thd_substream_info = 0x104; - } else if (!av_channel_layout_compare(&avctx->ch_layout, - &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1)) { + } else if (channels_present == AV_CH_LAYOUT_5POINT1) { ctx->ch_modifier_thd0 = 2; ctx->ch_modifier_thd1 = 1; ctx->ch_modifier_thd2 = 2; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
