[FFmpeg-devel] avcodec/audiotoolboxdec: fix missing decoder out properties

[MCC CS <mcccs@gmx.com>]

Resubmit: fix title.

This is a repost of the patch by Chris Snowhill who originally sent this patch
on 31 December - which didn't receive any replies. As you can see
on https://trac.ffmpeg.org/ticket/9564 the patch is needed and works perfectly.

I have rebased it and recompiled it.

Original commit description:

Monterey needs mBytesPerFrame and mBytesPerPacket to be set, and I'm
surprised this didn't break any previous system versions.

Fixes bug #9564: Cannot decode xHE-AAC with audiotoolbox (aac_at) on
Mac OS Monterey. Fixes likely bug that none of the AudioToolbox
decoders work on Monterey.
---
libavcodec/audiotoolboxdec.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/libavcodec/audiotoolboxdec.c b/libavcodec/audiotoolboxdec.c
index b8d0e868f7..daccf4abf8 100644
--- a/libavcodec/audiotoolboxdec.c
+++ b/libavcodec/audiotoolboxdec.c
@@ -375,6 +375,11 @@ static av_cold int ffat_create_decoder(AVCodecContext *avctx,
     avctx->ch_layout.order       = AV_CHANNEL_ORDER_UNSPEC;
     avctx->ch_layout.nb_channels = out_format.mChannelsPerFrame = in_format.mChannelsPerFrame;

+    out_format.mBytesPerFrame =
+        out_format.mChannelsPerFrame * (out_format.mBitsPerChannel / 8);
+    out_format.mBytesPerPacket =
+        out_format.mBytesPerFrame * out_format.mFramesPerPacket;
+
     if (avctx->codec_id == AV_CODEC_ID_ADPCM_IMA_QT)
         in_format.mFramesPerPacket = 64;

--
2.35.1
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