* T : Picture period, T = 1/frame_rate.
* tau[I,P,B] : Mean time to decode an [I,P,B] picture.
* tauYUV : Mean time to render a picture (given by the video_output).
- * tau´[I,P,B] = 2 * tau[I,P,B] + tauYUV
+ * tau´[I,P,B] = 2 * tau[I,P,B] + tauYUV
* : Mean time + typical difference (estimated to tau/2, that
* needs to be confirmed) + render time.
* DELTA : A given error margin.
* Otherwise :
* We can decode an I picture if we simply have enough time to decode it
* before displaying :
- * t0 - t > tau´I + DELTA
+ * t0 - t > tau´I + DELTA
*
* 5. Decoding of a P picture
* =======================
* On fast machines, we decode all P's.
* Otherwise :
* First criterion : have time to decode it.
- * t2 - t > tau´P + DELTA
+ * t2 - t > tau´P + DELTA
*
* Second criterion : it shouldn't prevent us from displaying the forthcoming
* I picture, which is more important.
- * t12 - t > tau´P + tau´I + DELTA
+ * t12 - t > tau´P + tau´I + DELTA
*
* 6. Decoding of a B picture
* =======================
* On fast machines, we decode all B's. Otherwise :
- * t1 - t > tau´B + DELTA
+ * t1 - t > tau´B + DELTA
* Since the next displayed I or P is already decoded, we don't have to
* worry about it.
*