avcodec/aptxenc: Process data in complete blocks of four samples only

Do this by setting AVCodecInternal.pad_samples.
This prevents reading into the frame's padding and writing
into the packet's padding.

This actually happened in our FATE tests (where the number of samples
is 2 mod 4), which therefore needed to be updated.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/aptxenc.c

@@ -27,6 +27,7 @@
 #include "audio_frame_queue.h"
 #include "codec_internal.h"
 #include "encode.h"
+#include "internal.h"
 
 typedef struct AptXEncContext {
     AptXContext common;
@@ -259,6 +260,7 @@ static av_cold int aptx_encode_init(AVCodecContext *avctx)
 
     if (!avctx->frame_size || avctx->frame_size % 4)
         avctx->frame_size = 1024;
+    avctx->internal->pad_samples = 4;
 
     return ff_aptx_init(avctx);
 }
@@ -269,7 +271,7 @@ const FFCodec ff_aptx_encoder = {
     CODEC_LONG_NAME("aptX (Audio Processing Technology for Bluetooth)"),
     .p.type                = AVMEDIA_TYPE_AUDIO,
     .p.id                  = AV_CODEC_ID_APTX,
-    .p.capabilities        = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SMALL_LAST_FRAME,
+    .p.capabilities        = AV_CODEC_CAP_DR1,
     .priv_data_size        = sizeof(AptXEncContext),
     .init                  = aptx_encode_init,
     FF_CODEC_ENCODE_CB(aptx_encode_frame),
@@ -290,7 +292,7 @@ const FFCodec ff_aptx_hd_encoder = {
     CODEC_LONG_NAME("aptX HD (Audio Processing Technology for Bluetooth)"),
     .p.type                = AVMEDIA_TYPE_AUDIO,
     .p.id                  = AV_CODEC_ID_APTX_HD,
-    .p.capabilities        = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SMALL_LAST_FRAME,
+    .p.capabilities        = AV_CODEC_CAP_DR1,
     .priv_data_size        = sizeof(AptXEncContext),
     .init                  = aptx_encode_init,
     FF_CODEC_ENCODE_CB(aptx_encode_frame),

tests/ref/fate/aptx

@@ -1,5 +1,5 @@
-b5d8a297c0e8d9854f19d9d3e8b82859 *tests/data/fate/aptx.aptx
-418950 tests/data/fate/aptx.aptx
+97dfd7f32d34fb74337c0f6c66e26e2d *tests/data/fate/aptx.aptx
+418952 tests/data/fate/aptx.aptx
 #tb 0: 1/44100
 #media_type 0: audio
 #codec_id 0: pcm_s16le

tests/ref/fate/aptx-hd

@@ -1,5 +1,5 @@
-48ecaa81ee5adaaa62ed3ff6574b6666 *tests/data/fate/aptx-hd.aptx_hd
-628425 tests/data/fate/aptx-hd.aptx_hd
+6126e414af1acb193e24fdf33c7cac2e *tests/data/fate/aptx-hd.aptx_hd
+628428 tests/data/fate/aptx-hd.aptx_hd
 #tb 0: 1/44100
 #media_type 0: audio
 #codec_id 0: pcm_s32le