[FFmpeg-devel] [PATCH 1/2] avcodec/mlpenc: encode last frame too

[James Almer]

On 11/28/2017 4:55 PM, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  libavcodec/mlpenc.c | 22 +++++++++++-----------
>  1 file changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/libavcodec/mlpenc.c b/libavcodec/mlpenc.c
> index 7536d3b2f5..c588f5b904 100644
> --- a/libavcodec/mlpenc.c
> +++ b/libavcodec/mlpenc.c
> @@ -2225,29 +2225,27 @@ static int mlp_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
>      int restart_frame, ret;
>      uint8_t *data;
>  
> -    if ((ret = ff_alloc_packet2(avctx, avpkt, 87500 * avctx->channels, 0)) < 0)
> -        return ret;
> -
> -    if (!frame)
> -        return 1;
> -
>      /* add current frame to queue */
>      if (frame) {
>          if ((ret = ff_af_queue_add(&ctx->afq, frame)) < 0)
>              return ret;
> +    } else {
> +        if (ctx->last_frame == ctx->inout_buffer) {
> +            return 0;
> +        }
>      }
>  
> -    data = frame->data[0];
> +
> +    if ((ret = ff_alloc_packet2(avctx, avpkt, 87500 * avctx->channels, 0)) < 0)
> +        return ret;
> +
> +    data = frame ? frame->data[0] : NULL;
>  
>      ctx->frame_index = avctx->frame_number % ctx->max_restart_interval;
>  
>      ctx->inout_buffer = ctx->major_inout_buffer
>                        + ctx->frame_index * ctx->one_sample_buffer_size;
>  
> -    if (ctx->last_frame == ctx->inout_buffer) {
> -        return 0;
> -    }
> -
>      ctx->sample_buffer = ctx->major_scratch_buffer
>                         + ctx->frame_index * ctx->one_sample_buffer_size;
>  
> @@ -2333,6 +2331,8 @@ input_and_return:
>                  number_of_samples += ctx->frame_size[(ctx->starting_frame_index + index) % ctx->max_restart_interval];
>              }
>              ctx->number_of_samples = number_of_samples;
> +            if (!ctx->number_of_samples)
> +                break;
>  
>              for (index = 0; index < ctx->seq_size[seq_index]; index++) {
>                  clear_channel_params(ctx, ctx->seq_channel_params + index*(ctx->avctx->channels));
> 

After this patch the sample from ticket 6216 prints a "Trying to remove
40 samples, but the queue is empty" warning during encoding.