Here is sample: https://0x0.st/z49v.avi
On 8/30/19, Paul B Mahol <one...@gmail.com> wrote:
> It still exits early when no blocks are encoded.
>
> On 8/30/19, James Almer <jamr...@gmail.com> wrote:
>> Signed-off-by: James Almer <jamr...@gmail.com>
>> ---
>> Untested. There doesn't seem to be a fate test, and i have no samples
>> at hand.
>>
>> libavcodec/wcmv.c | 23 +++++++++--------------
>> 1 file changed, 9 insertions(+), 14 deletions(-)
>>
>> diff --git a/libavcodec/wcmv.c b/libavcodec/wcmv.c
>> index 0d60b9fe1f..68142b45fd 100644
>> --- a/libavcodec/wcmv.c
>> +++ b/libavcodec/wcmv.c
>> @@ -60,7 +60,7 @@ static int decode_frame(AVCodecContext *avctx,
>> if (!blocks)
>> return avpkt->size;
>>
>> - if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
>> + if ((ret = ff_reget_buffer(avctx, s->prev_frame)) < 0)
>> return ret;
>>
>> if (blocks > 5) {
>> @@ -157,13 +157,9 @@ static int decode_frame(AVCodecContext *avctx,
>> if (bytestream2_get_bytes_left(&gb) < 8LL * blocks)
>> return AVERROR_INVALIDDATA;
>>
>> - if (s->prev_frame->data[0]) {
>> - ret = av_frame_copy(frame, s->prev_frame);
>> - if (ret < 0)
>> - return ret;
>> - } else {
>> - ptrdiff_t linesize[4] = { frame->linesize[0], 0, 0, 0 };
>> - av_image_fill_black(frame->data, linesize, avctx->pix_fmt, 0,
>> + if (!avctx->frame_number) {
>> + ptrdiff_t linesize[4] = { s->prev_frame->linesize[0], 0, 0, 0 };
>> + av_image_fill_black(s->prev_frame->data, linesize,
>> avctx->pix_fmt,
>> 0,
>> avctx->width, avctx->height);
>> }
>>
>> @@ -184,7 +180,7 @@ static int decode_frame(AVCodecContext *avctx,
>> if (w > avctx->width || h > avctx->height)
>> return AVERROR_INVALIDDATA;
>>
>> - dst = frame->data[0] + (avctx->height - y - 1) *
>> frame->linesize[0]
>> + x * bpp;
>> + dst = s->prev_frame->data[0] + (avctx->height - y - 1) *
>> s->prev_frame->linesize[0] + x * bpp;
>> for (int i = 0; i < h; i++) {
>> s->zstream.next_out = dst;
>> s->zstream.avail_out = w * bpp;
>> @@ -196,15 +192,14 @@ static int decode_frame(AVCodecContext *avctx,
>> return AVERROR_INVALIDDATA;
>> }
>>
>> - dst -= frame->linesize[0];
>> + dst -= s->prev_frame->linesize[0];
>> }
>> }
>>
>> - frame->key_frame = intra;
>> - frame->pict_type = intra ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
>> + s->prev_frame->key_frame = intra;
>> + s->prev_frame->pict_type = intra ? AV_PICTURE_TYPE_I :
>> AV_PICTURE_TYPE_P;
>>
>> - av_frame_unref(s->prev_frame);
>> - if ((ret = av_frame_ref(s->prev_frame, frame)) < 0)
>> + if ((ret = av_frame_ref(frame, s->prev_frame)) < 0)
>> return ret;
>>
>> *got_frame = 1;
>> --
>> 2.22.0
>>
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