[Spice-devel] [PATCH 14/16] worker: don't use weird RedCompressedBuf nbytes shifting

[Frediano Ziglio]

> 
> Hmm, this code was fairly weird. It's still a bit weird that the 'more_space'
> vfunc for the quic encoder has different semantics than all of the rest of
> them
> (returning the number of uint32_t elements allocated instead of the number of
> bytes allocated). But the code is slightly less confusing now. ACK
> 
> 

Did you see http://lists.freedesktop.org/archives/spice-devel/2015-November/023358.html?

On the same subject... is it ok to post again same patch if there are comments
or is it confusing?

I personally agree encoder_usr_more_space should return bytes and not uint32_t
elements however I prefer to have uint32_t in the structure.

Frediano

> 
> 
> On Tue, 2015-11-10 at 14:16 +0000, Frediano Ziglio wrote:
> > From: Marc-André Lureau <marcandre.lureau at gmail.com>
> > 
> > ---
> >  server/display-channel.h |  3 +--
> >  server/red_worker.c      | 18 +++++++++---------
> >  2 files changed, 10 insertions(+), 11 deletions(-)
> > 
> > diff --git a/server/display-channel.h b/server/display-channel.h
> > index 7c62a62..f1f4e3a 100644
> > --- a/server/display-channel.h
> > +++ b/server/display-channel.h
> > @@ -70,10 +70,9 @@
> >  #define NUM_STREAMS 50
> >  #define NUM_SURFACES 10000
> >  
> > -#define RED_COMPRESS_BUF_SIZE (1024 * 64)
> >  typedef struct RedCompressBuf RedCompressBuf;
> >  struct RedCompressBuf {
> > -    uint32_t buf[RED_COMPRESS_BUF_SIZE / 4];
> > +    uint8_t buf[64 * 1024];
> >      RedCompressBuf *next;
> >      RedCompressBuf *send_next;
> >  };
> > diff --git a/server/red_worker.c b/server/red_worker.c
> > index 1b8951f..5daca87 100644
> > --- a/server/red_worker.c
> > +++ b/server/red_worker.c
> > @@ -3886,7 +3886,7 @@ static void glz_usr_free(GlzEncoderUsrContext *usr,
> > void
> > *ptr)
> >      free(ptr);
> >  }
> >  
> > -static inline int encoder_usr_more_space(EncoderData *enc_data, uint32_t
> > **io_ptr)
> > +static int encoder_usr_more_space(EncoderData *enc_data, uint8_t **io_ptr)
> >  {
> >      RedCompressBuf *buf;
> >  
> > @@ -3897,31 +3897,31 @@ static inline int
> > encoder_usr_more_space(EncoderData
> > *enc_data, uint32_t **io_pt
> >      enc_data->bufs_tail = buf;
> >      buf->send_next = NULL;
> >      *io_ptr = buf->buf;
> > -    return sizeof(buf->buf) >> 2;
> > +    return sizeof(buf->buf);
> >  }
> >  
> >  static int quic_usr_more_space(QuicUsrContext *usr, uint32_t **io_ptr, int
> > rows_completed)
> >  {
> >      EncoderData *usr_data = &(((QuicData *)usr)->data);
> > -    return encoder_usr_more_space(usr_data, io_ptr);
> > +    return encoder_usr_more_space(usr_data, (uint8_t **)io_ptr) /
> > sizeof(uint32_t);
> >  }
> >  
> >  static int lz_usr_more_space(LzUsrContext *usr, uint8_t **io_ptr)
> >  {
> >      EncoderData *usr_data = &(((LzData *)usr)->data);
> > -    return (encoder_usr_more_space(usr_data, (uint32_t **)io_ptr) << 2);
> > +    return encoder_usr_more_space(usr_data, io_ptr);
> >  }
> >  
> >  static int glz_usr_more_space(GlzEncoderUsrContext *usr, uint8_t **io_ptr)
> >  {
> >      EncoderData *usr_data = &(((GlzData *)usr)->data);
> > -    return (encoder_usr_more_space(usr_data, (uint32_t **)io_ptr) << 2);
> > +    return encoder_usr_more_space(usr_data, io_ptr);
> >  }
> >  
> >  static int jpeg_usr_more_space(JpegEncoderUsrContext *usr, uint8_t
> >  **io_ptr)
> >  {
> >      EncoderData *usr_data = &(((JpegData *)usr)->data);
> > -    return (encoder_usr_more_space(usr_data, (uint32_t **)io_ptr) << 2);
> > +    return encoder_usr_more_space(usr_data, io_ptr);
> >  }
> >  
> >  #ifdef USE_LZ4
> > @@ -3935,7 +3935,7 @@ static int lz4_usr_more_space(Lz4EncoderUsrContext
> > *usr,
> > uint8_t **io_ptr)
> >  static int zlib_usr_more_space(ZlibEncoderUsrContext *usr, uint8_t
> >  **io_ptr)
> >  {
> >      EncoderData *usr_data = &(((ZlibData *)usr)->data);
> > -    return (encoder_usr_more_space(usr_data, (uint32_t **)io_ptr) << 2);
> > +    return encoder_usr_more_space(usr_data, io_ptr);
> >  }
> >  
> >  static inline int encoder_usr_more_lines(EncoderData *enc_data, uint8_t
> > **lines)
> > @@ -4589,8 +4589,8 @@ static inline int
> > red_quic_compress_image(DisplayChannelClient *dcc, SpiceImage
> >          stride = -src->stride;
> >      }
> >      size = quic_encode(quic, type, src->x, src->y, NULL, 0, stride,
> > -                       quic_data->data.bufs_head->buf,
> > -                       sizeof(quic_data->data.bufs_head->buf) >> 2);
> > +                       (uint32_t*)quic_data->data.bufs_head->buf,
> > +                       sizeof(quic_data->data.bufs_head->buf) /
> > sizeof(uint32_t));
> >  
> >      // the compressed buffer is bigger than the original data
> >      if ((size << 2) > (src->y * src->stride)) {
>