Dear List,
I am decoding H264 into YUV and using the YUV bitmaps in a custom
application.
For av pixel formats
AV_PIX_FMT_YUV420P
AV_PIX_FMT_YUVJ420P
I calculate the number of bytes in each plane like this (av_frame is
AVFrame*):
y_size =(GLsizei)( (av_frame->height)*(av_frame->linesize[0]) );
u_size =(GLsizei)( (av_frame->height/2)*(av_frame->linesize[1]) );
v_size =(GLsizei)( (av_frame->height/2)*(av_frame->linesize[2]) );
Question 1: Is there a more "standard" way of doing this? Here I am
using "outside" information by assuming that "height/2". Can I get the
number of bytes in each plane (safely) somewhere from the AVCodecContext
or AVFrame structures directly?
Then, accessing the data itself:
av_frame->data[0] has y_size bytes
av_frame->data[1] has u_size bytes
av_frame->data[2] has v_size bytes
Question 2: Can I assume that data[0]..data[2] is a continuous block of
memory?
Regards,
Sampsa
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