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This way we get the RGB from the sampled pixel using 2 matrix multiplications.
It may be more efficient than adding values separately
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

This is especially important for sub pictures that are not HDR but displayed on
HDR display.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

We'll now have 360° elements by default
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Direct rendering is already present using PBO (GL_EXT_pixel_buffer_object) and
persistent buffers (GL_EXT_buffer_storage). But these extensions are available
only since OpenGL 4.4.

For older OpenGL versions (OpenGL 2.0 and OpenGL ES3 (or as an extension since
OpenGL ES2)), we can still improve quite a bit the performances by using a
non-mapped PBO and updating it via glBufferSubData. This won't be true direct
rendering since you must copy the data from the decoded picture to the GPU.

By using 2 PBOs (double buffering), we make sure that we can upload to the GPU
while the previous picture is beeing rendered.

Performances gains measured by playing 4K30fps video during 1 minute: 7 seconds
spent in vout->prepare() instead of 10 seconds. This result may vary with the
platform/device/drivers.

Thanks to sesse for the advices.

As picture_t used to render subptictures are not allocated by the converter
pool, they are not configured for direct rendering.

Rename tc_xyz12_init to xyz12_shader_init, and only initialise the shader.

Modify the GET_PROC_ADDR macro to do so and add a critical argument. If
critical is no, the function is not mandatory, this is the case for persistent
mapping functions (converters.c do check these functions pointer).

strcoll should be used if a or b are nondigit.

Don't depend on android liblog. Print the error message on stderr. This message
can be lost, but the most important part is the full backtrace produced by the
failing assert.

The backtrace produced by the failing assert is enough.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Modified-by: Jean-Baptiste Kempf <jb@videolan.org>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

The modules are always loaded with an absolute path. So we should not
need anything else to load modules properly with their system libraries.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Correct misleading comments and help messages

Avoid mismatch of signature descrambling call