shithub: libvpx

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Refactor the vp9_get_frame code for frame parallel.

In frame parallel decoding mode,  there will be still several frames inside
the decoder when application stop calling vpx_codec_decode to decode frames.
The application will need to keep calling vpx_codec_get_frame to get all the
remaining decoded frames in the decoder.

Change-Id: I2ce8260a91282f045bb9a6093ff8a606b1990f14

--- a/vp9/vp9_dx_iface.c

+++ b/vp9/vp9_dx_iface.c

@@ -38,7 +38,6 @@

   vpx_decrypt_cb          decrypt_cb;

   void                   *decrypt_state;

   vpx_image_t             img;

-  int                     img_avail;

   int                     invert_tile_order;

   // External frame buffer info to save for VP9 common.

@@ -245,15 +244,11 @@

 static vpx_codec_err_t decode_one(vpx_codec_alg_priv_t *ctx,

                                   const uint8_t **data, unsigned int data_sz,

                                   void *user_priv, int64_t deadline) {

-  YV12_BUFFER_CONFIG sd;

-  vp9_ppflags_t flags = {0, 0, 0};

+  vp9_ppflags_t flags = {0};

   VP9_COMMON *cm = NULL;

   (void)deadline;

-  vp9_zero(sd);

-  ctx->img_avail = 0;

-

   // Determine the stream parameters. Note that we rely on peek_si to

   // validate that we have a buffer that does not wrap around the top

   // of the heap.

@@ -288,13 +283,6 @@

   if (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC)

     set_ppflags(ctx, &flags);

-  if (vp9_get_raw_frame(ctx->pbi, &sd, &flags))

-    return update_error_state(ctx, &cm->error);

-

-  yuvconfig2image(&ctx->img, &sd, user_priv);

-  ctx->img.fb_priv = cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer.priv;

-  ctx->img_avail = 1;

-

   return VPX_CODEC_OK;

 }

@@ -423,15 +411,20 @@

                                       vpx_codec_iter_t *iter) {

   vpx_image_t *img = NULL;

-  if (ctx->img_avail) {

-    // iter acts as a flip flop, so an image is only returned on the first

-    // call to get_frame.

-    if (!(*iter)) {

+  // iter acts as a flip flop, so an image is only returned on the first

+  // call to get_frame.

+  if (*iter == NULL && ctx->pbi != NULL) {

+    YV12_BUFFER_CONFIG sd;

+    vp9_ppflags_t flags = {0, 0, 0};

+

+    if (vp9_get_raw_frame(ctx->pbi, &sd, &flags) == 0) {

+      VP9_COMMON *cm = &ctx->pbi->common;

+      yuvconfig2image(&ctx->img, &sd, NULL);

+      ctx->img.fb_priv = cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer.priv;

       img = &ctx->img;

       *iter = img;

     }

   }

-  ctx->img_avail = 0;

   return img;

 }