[FFmpeg-devel] [PATCH 1/2] avocdec/ttaenc: buffer packets directly

[James Almer]

On 11/20/2017 5:44 PM, James Almer wrote:
> This is a bit more robust in case of OOM.
> 
> Signed-off-by: James Almer <jamrial at gmail.com>
> ---
>  libavformat/ttaenc.c | 42 +++++++++++++++++++++++++++++++++---------
>  1 file changed, 33 insertions(+), 9 deletions(-)
> 
> diff --git a/libavformat/ttaenc.c b/libavformat/ttaenc.c
> index fdce1e3dc1..b05705b6b6 100644
> --- a/libavformat/ttaenc.c
> +++ b/libavformat/ttaenc.c
> @@ -29,7 +29,7 @@
>  
>  typedef struct TTAMuxContext {
>      AVIOContext *seek_table;
> -    AVIOContext *data;
> +    AVPacketList *queue, *queue_end;
>      uint32_t nb_samples;
>      int frame_size;
>      int last_frame;
> @@ -56,10 +56,6 @@ static int tta_write_header(AVFormatContext *s)
>  
>      if ((ret = avio_open_dyn_buf(&tta->seek_table)) < 0)
>          return ret;
> -    if ((ret = avio_open_dyn_buf(&tta->data)) < 0) {
> -        ffio_free_dyn_buf(&tta->seek_table);
> -        return ret;
> -    }
>  
>      /* Ignore most extradata information if present. It can be innacurate
>         if for example remuxing from Matroska */
> @@ -84,8 +80,23 @@ static int tta_write_header(AVFormatContext *s)
>  static int tta_write_packet(AVFormatContext *s, AVPacket *pkt)
>  {
>      TTAMuxContext *tta = s->priv_data;
> +    AVPacketList *pktl = av_mallocz(sizeof(*pktl));
> +    int ret;
> +
> +    if (!pktl)
> +        return AVERROR(ENOMEM);
> +
> +    ret = av_packet_ref(&pktl->pkt, pkt);
> +    if (ret < 0) {
> +        av_free(pktl);
> +        return ret;
> +    }
> +    if (tta->queue_end)
> +        tta->queue_end->next = pktl;
> +    else
> +        tta->queue = pktl;
> +    tta->queue_end = pktl;
>  
> -    avio_write(tta->data, pkt->data, pkt->size);
>      avio_wl32(tta->seek_table, pkt->size);
>      tta->nb_samples += pkt->duration;
>  
> @@ -106,6 +117,21 @@ static int tta_write_packet(AVFormatContext *s, AVPacket *pkt)
>      return 0;
>  }
>  
> +static void tta_queue_flush(AVFormatContext *s)
> +{
> +    TTAMuxContext *tta = s->priv_data;
> +    AVPacketList *pktl;
> +
> +    while (pktl = tta->queue) {
> +        AVPacket *pkt = &pktl->pkt;
> +        avio_write(s->pb, pkt->data, pkt->size);
> +        av_packet_unref(pkt);
> +        tta->queue = pktl->next;
> +        av_free(pktl);
> +    }
> +    tta->queue_end = NULL;
> +}
> +
>  static int tta_write_trailer(AVFormatContext *s)
>  {
>      TTAMuxContext *tta = s->priv_data;
> @@ -125,9 +151,7 @@ static int tta_write_trailer(AVFormatContext *s)
>      av_free(ptr);
>  
>      /* Write audio data */
> -    size = avio_close_dyn_buf(tta->data, &ptr);
> -    avio_write(s->pb, ptr, size);
> -    av_free(ptr);
> +    tta_queue_flush(s);
>  
>      ff_ape_write_tag(s);
>      avio_flush(s->pb);

Ping.