/**
* Initializes the block field of the MpegEncContext pointer passed as
* parameter after making sure that the data is not corrupted.
+ * In order to implement something like direct rendering instead of decodeing
+ * coefficients in s->blocks and then copy them, do that directly
+ * into the data_blocks array provided by xvmc.
*/
void ff_xvmc_init_block(MpegEncContext *s)
{
s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
}
+/**
+ * Fill individual block pointers, so there are no gaps in the data_block array
+ * in case not all blocks in MB are coded.
+ */
void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
{
int i, j = 0;
}
/**
+ * Find and store the surfaces that are used as reference frames.
* This function should be called for every new field and/or frame.
* It should be safe to call the function a few times for the same field.
*/
}
/**
- * This function should be called for every new field and/or frame.
+ * Complete frame/field rendering by passing any remaining blocks.
+ * Normally ff_draw_horiz_band() is called on each slice, however
+ * there may be some remaining blocks, for example put by error_resilience.
* It should be safe to call the function a few times for the same field.
*/
void ff_xvmc_field_end(MpegEncContext *s)
ff_draw_horiz_band(s, 0, 0);
}
+/**
+ * Synthesize the data needed by XvMC to render one macroblock of data.
+ * Fill all relevent fields, if necessery do IDCT.
+ */
void ff_xvmc_decode_mb(MpegEncContext *s)
{
XvMCMacroBlock *mv_block;