#ifndef _MOVIT_YCBCR_INPUT_H
#define _MOVIT_YCBCR_INPUT_H 1
-// YCbCrInput is for handling planar 8-bit Y'CbCr (also sometimes, usually rather
-// imprecisely, called “YUV”), which is typically what you get from a video decoder.
-// It upsamples planes as needed, using the default linear upsampling OpenGL gives you.
+// YCbCrInput is for handling Y'CbCr (also sometimes, usually rather
+// imprecisely, called “YUV”), which is typically what you get from a video
+// decoder. It supports these formats:
+//
+// * 8-bit planar Y'CbCr, possibly subsampled (e.g. 4:2:0).
+// * 8-bit semiplanar Y'CbCr (Y' in one plane, CbCr in another),
+// possibly subsampled.
+// * 8-bit interleaved (chunked) Y'CbCr, no subsampling (4:4:4 only).
+// * All of the above in 10- and 12-bit versions, where each sample is
+// stored in a 16-bit int (so the 6 or 4 top bits are wasted).
+// * 10-bit interleaved (chunked) Y'CbCr packed into 32-bit words
+// (10:10:10:2), no subsampling (4:4:4 only).
+//
+// For the planar and semiplanar cases, it upsamples planes as needed, using
+// the default linear upsampling OpenGL gives you. Note that YCbCr422InterleavedInput
+// supports the important special case of 8-bit 4:2:2 interleaved.
#include <epoxy/gl.h>
#include <assert.h>
#include "effect_chain.h"
#include "image_format.h"
#include "input.h"
+#include "ycbcr.h"
namespace movit {
class ResourcePool;
-struct YCbCrFormat {
- // Which formula for Y' to use.
- YCbCrLumaCoefficients luma_coefficients;
-
- // If true, assume Y'CbCr coefficients are full-range, ie. go from 0 to 255
- // instead of the limited 220/225 steps in classic MPEG. For instance,
- // JPEG uses the Rec. 601 luma coefficients, but full range.
- bool full_range;
-
- // Sampling factors for chroma components. For no subsampling (4:4:4),
- // set both to 1.
- unsigned chroma_subsampling_x, chroma_subsampling_y;
-
- // Positioning of the chroma samples. MPEG-1 and JPEG is (0.5, 0.5);
- // MPEG-2 and newer typically are (0.0, 0.5).
- float cb_x_position, cb_y_position;
- float cr_x_position, cr_y_position;
+// Whether the data is planar (Y', Cb and Cr in one texture each) or not.
+enum YCbCrInputSplitting {
+ // The standard, default case; Y', Cb and Cr in one texture each.
+ YCBCR_INPUT_PLANAR,
+
+ // Y' in one texture, and then Cb and Cr interleaved in one texture.
+ // In particular, this is a superset of the relatively popular NV12 mode.
+ // If you specify this mode, the “Cr” pointer texture will be unused
+ // (the ”Cb” texture contains both).
+ YCBCR_INPUT_SPLIT_Y_AND_CBCR,
+
+ // Y', Cb and Cr interleaved in the same texture (the “Y” texture;
+ // “Cb” and “Cr” are unused). This means you cannot have any subsampling;
+ // 4:4:4 only.
+ YCBCR_INPUT_INTERLEAVED,
};
class YCbCrInput : public Input {
public:
+ // Type can be GL_UNSIGNED_BYTE for 8-bit, GL_UNSIGNED_SHORT for 10- or 12-bit
+ // (or 8-bit, although that's a bit useless), or GL_UNSIGNED_INT_2_10_10_10_REV
+ // for 10-bit (YCBCR_INPUT_INTERLEAVED only).
YCbCrInput(const ImageFormat &image_format,
const YCbCrFormat &ycbcr_format,
- unsigned width, unsigned height);
+ unsigned width, unsigned height,
+ YCbCrInputSplitting ycbcr_input_splitting = YCBCR_INPUT_PLANAR,
+ GLenum type = GL_UNSIGNED_BYTE);
~YCbCrInput();
virtual std::string effect_type_id() const { return "YCbCrInput"; }
unsigned get_height() const { return height; }
Colorspace get_color_space() const { return image_format.color_space; }
GammaCurve get_gamma_curve() const { return image_format.gamma_curve; }
+ virtual bool can_supply_mipmaps() const { return ycbcr_input_splitting == YCBCR_INPUT_INTERLEAVED; }
+ virtual bool is_single_texture() const { return ycbcr_input_splitting == YCBCR_INPUT_INTERLEAVED; }
// Tells the input where to fetch the actual pixel data. Note that if you change
// this data, you must either call set_pixel_data() again (using the same pointer
// the pointer (and PBO, if set) has to be valid at the time of the render call.
void set_pixel_data(unsigned channel, const unsigned char *pixel_data, GLuint pbo = 0)
{
- assert(channel >= 0 && channel < 3);
+ assert(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_2_10_10_10_REV);
+ assert(channel >= 0 && channel < num_channels);
this->pixel_data[channel] = pixel_data;
this->pbos[channel] = pbo;
invalidate_pixel_data();
}
+ void set_pixel_data(unsigned channel, const uint16_t *pixel_data, GLuint pbo = 0)
+ {
+ assert(type == GL_UNSIGNED_SHORT);
+ assert(channel >= 0 && channel < num_channels);
+ this->pixel_data[channel] = reinterpret_cast<const unsigned char *>(pixel_data);
+ this->pbos[channel] = pbo;
+ invalidate_pixel_data();
+ }
+
+ void set_pixel_data(unsigned channel, const uint32_t *pixel_data, GLuint pbo = 0)
+ {
+ assert(type == GL_UNSIGNED_INT_2_10_10_10_REV);
+ assert(channel == 0);
+ this->pixel_data[channel] = reinterpret_cast<const unsigned char *>(pixel_data);
+ this->pbos[channel] = pbo;
+ invalidate_pixel_data();
+ }
+
void invalidate_pixel_data();
- void set_pitch(unsigned channel, unsigned pitch) {
- assert(channel >= 0 && channel < 3);
+ // Note: Sets pitch to width, so even if your pitch is unchanged,
+ // you will need to re-set it after this call.
+ void set_width(unsigned width)
+ {
+ assert(width != 0);
+ this->width = width;
+
+ assert(width % ycbcr_format.chroma_subsampling_x == 0);
+ pitch[0] = widths[0] = width;
+ pitch[1] = widths[1] = width / ycbcr_format.chroma_subsampling_x;
+ pitch[2] = widths[2] = width / ycbcr_format.chroma_subsampling_x;
+ invalidate_pixel_data();
+ }
+
+ void set_height(unsigned height)
+ {
+ assert(height != 0);
+ this->height = height;
+
+ assert(height % ycbcr_format.chroma_subsampling_y == 0);
+ heights[0] = height;
+ heights[1] = height / ycbcr_format.chroma_subsampling_y;
+ heights[2] = height / ycbcr_format.chroma_subsampling_y;
+ invalidate_pixel_data();
+ }
+
+ void set_pitch(unsigned channel, unsigned pitch)
+ {
+ assert(pitch != 0);
+ assert(channel >= 0 && channel < num_channels);
this->pitch[channel] = pitch;
invalidate_pixel_data();
}
+ // Tells the input to use the specific OpenGL texture as pixel data for the given
+ // channel. The comments on FlatInput::set_texture_num() also apply here, except
+ // that this input generally does not use mipmaps.
+ void set_texture_num(unsigned channel, GLuint texture_num)
+ {
+ possibly_release_texture(channel);
+ this->texture_num[channel] = texture_num;
+ this->owns_texture[channel] = false;
+ }
+
virtual void inform_added(EffectChain *chain)
{
resource_pool = chain->get_resource_pool();
}
+ bool set_int(const std::string& key, int value);
+
private:
+ // Release the texture in the given channel if we have any, and it is owned by us.
+ void possibly_release_texture(unsigned channel);
+
ImageFormat image_format;
YCbCrFormat ycbcr_format;
+ GLuint num_channels;
+ YCbCrInputSplitting ycbcr_input_splitting;
+ GLenum type;
GLuint pbos[3], texture_num[3];
-
- int needs_mipmaps;
+ GLint uniform_tex_y, uniform_tex_cb, uniform_tex_cr;
unsigned width, height, widths[3], heights[3];
const unsigned char *pixel_data[3];
unsigned pitch[3];
+ bool owns_texture[3];
ResourcePool *resource_pool;
};
projects / movit / blobdiff