[FFmpeg-devel] [PATCH 2/9] avcodec/utils: Support APTX (HD) in av_get_audio_frame_duration()

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

APTX decodes four bytes of input to four stereo samples; APTX HD
does the same with six bytes of input. So it can be easily supported
in av_get_audio_frame_duration().

This fixes invalid durations and (derived) timestamps of demuxed
APTX HD packets and therefore fixed the timestamp in the aptx-hd
FATE test.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/utils.c     |  4 ++++
 tests/ref/fate/aptx-hd | 17 ++++++++++-------
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 2f57418ff7..ba64aaf32d 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -682,6 +682,10 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
             return 256 * (frame_bytes / 64);
         if (id == AV_CODEC_ID_RA_144)
             return 160 * (frame_bytes / 20);
+        if (id == AV_CODEC_ID_APTX)
+            return 4 * (frame_bytes / 4);
+        if (id == AV_CODEC_ID_APTX_HD)
+            return 4 * (frame_bytes / 6);
 
         if (bps > 0) {
             /* calc from frame_bytes and bits_per_coded_sample */
diff --git a/tests/ref/fate/aptx-hd b/tests/ref/fate/aptx-hd
index 0691f33c86..498b9131a6 100644
--- a/tests/ref/fate/aptx-hd
+++ b/tests/ref/fate/aptx-hd
@@ -6,10 +6,13 @@
 #sample_rate 0: 44100
 #channel_layout_name 0: 2 channels
 0,          0,          0,     1024,     8192, 0xa99888c6
-0,       1536,       1536,     1024,     8192, 0xc3e03a3c
-0,       3072,       3072,     1024,     8192, 0x3f06e090
-0,       4608,       4608,     1024,     8192, 0x92fb18f3
-0,       6144,       6144,     1024,     8192, 0x3d5603a2
-0,       7680,       7680,     1024,     8192, 0xcc3d3101
-0,       9216,       9216,     1024,     8192, 0xbcc022ef
-0,      10752,      10752,      273,     2184, 0x9873af57
+0,       1024,       1024,     1024,     8192, 0xc3e03a3c
+0,       2048,       2048,     1024,     8192, 0x3f06e090
+0,       3072,       3072,     1024,     8192, 0x92fb18f3
+0,       4096,       4096,     1024,     8192, 0x3d5603a2
+0,       5120,       5120,     1024,     8192, 0xcc3d3101
+0,       6144,       6144,     1024,     8192, 0xbcc022ef
+0,       7168,       7168,     1024,     8192, 0x600cbb73
+0,       8192,       8192,     1024,     8192, 0xdc938cbb
+0,       9216,       9216,     1024,     8192, 0x37d968bc
+0,      10240,      10240,      785,     6280, 0x48243144
-- 
2.34.1

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