On 26/4/21 6:00 am, Aidan Richmond wrote:

Patch 1/3: lgtm

Patch 2/3:
+static int wsaud_write_init(AVFormatContext *ctx)
+{
+    AVStream     *st = ctx->streams[0];
+    AVIOContext  *pb = ctx->pb;
+
+    /* Stream must be seekable to correctly write the file. */
+    if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
+        av_log(ctx->streams[0], AV_LOG_ERROR, "Cannot write Westwood aud to"
+               " none seekable stream.\n");
+        return AVERROR(EINVAL);
+    }
+
Typo, Non-seekable? And capitalise aud -> AUD to be consistent.

Patch 3/3:
Fixes bug #9198

Signed-off-by: Aidan Richmond <aidan...@hotmail.co.uk>
---
  libavcodec/adpcm.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index be14607eac..5ec9691001 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -1400,16 +1400,16 @@ static int adpcm_decode_frame(AVCodecContext *avctx, 
void *data,
for (n = nb_samples / 2; n > 0; n--) {
                      int v = bytestream2_get_byteu(&gb);
-                    *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 
4  , 3);
                      *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 
0x0F, 3);
+                    *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 
4  , 3);
                  }
              }
          } else {
              for (n = nb_samples / 2; n > 0; n--) {
                  for (channel = 0; channel < avctx->channels; channel++) {
                      int v = bytestream2_get_byteu(&gb);
-                    *samples++  = adpcm_ima_expand_nibble(&c->status[channel], v 
>> 4  , 3);
-                    samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v 
& 0x0F, 3);
+                    *samples++  = adpcm_ima_expand_nibble(&c->status[channel], v 
& 0x0F, 3);
+                    samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v 
>> 4  , 3);
                  }
                  samples += avctx->channels;
              }


As Andreas said in the previous patch, you need to update the FATE test.

If it's easier (and with your permission), I can just do this and squash it 
into the commit
before I apply it. Might as well fix the typo in 2/3 too.

See 
https://github.com/vs49688/FFmpeg/commit/806f982ca2c310d6d639a3e554735b41b67c9259.patch


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