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FFmpeg
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This structure describes how to handle film grain synthesis for AOM codecs. More...
#include <film_grain_params.h>
Data Fields | |
| int | num_y_points |
| Number of points, and the scale and value for each point of the piecewise linear scaling function for the uma plane. More... | |
| uint8_t | y_points [14][2] |
| int | chroma_scaling_from_luma |
| Signals whether to derive the chroma scaling function from the luma. More... | |
| int | num_uv_points [2] |
| If chroma_scaling_from_luma is set to 0, signals the chroma scaling function parameters. More... | |
| uint8_t | uv_points [2][10][2] |
| int | scaling_shift |
| Specifies the shift applied to the chroma components. More... | |
| int | ar_coeff_lag |
| Specifies the auto-regression lag. More... | |
| int8_t | ar_coeffs_y [24] |
| Luma auto-regression coefficients. More... | |
| int8_t | ar_coeffs_uv [2][25] |
| Chroma auto-regression coefficients. More... | |
| int | ar_coeff_shift |
| Specifies the range of the auto-regressive coefficients. More... | |
| int | grain_scale_shift |
| Signals the down shift applied to the generated gaussian numbers during synthesis. More... | |
| int | uv_mult [2] |
| Specifies the luma/chroma multipliers for the index to the component scaling function. More... | |
| int | uv_mult_luma [2] |
| int | uv_offset [2] |
| Offset used for component scaling function. More... | |
| int | overlap_flag |
| Signals whether to overlap film grain blocks. More... | |
| int | limit_output_range |
| Signals to clip to limited color levels after film grain application. More... | |
This structure describes how to handle film grain synthesis for AOM codecs.
Definition at line 44 of file film_grain_params.h.
| int AVFilmGrainAOMParams::num_y_points |
Number of points, and the scale and value for each point of the piecewise linear scaling function for the uma plane.
Definition at line 49 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| uint8_t AVFilmGrainAOMParams::y_points[14][2] |
Definition at line 50 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::chroma_scaling_from_luma |
Signals whether to derive the chroma scaling function from the luma.
Not equivalent to copying the luma values and scales.
Definition at line 56 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::num_uv_points[2] |
If chroma_scaling_from_luma is set to 0, signals the chroma scaling function parameters.
Definition at line 62 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| uint8_t AVFilmGrainAOMParams::uv_points[2][10][2] |
Definition at line 63 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::scaling_shift |
Specifies the shift applied to the chroma components.
For AV1, its within [8; 11] and determines the range and quantization of the film grain.
Definition at line 69 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::ar_coeff_lag |
Specifies the auto-regression lag.
Definition at line 74 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int8_t AVFilmGrainAOMParams::ar_coeffs_y[24] |
Luma auto-regression coefficients.
The number of coefficients is given by 2 * ar_coeff_lag * (ar_coeff_lag + 1).
Definition at line 80 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int8_t AVFilmGrainAOMParams::ar_coeffs_uv[2][25] |
Chroma auto-regression coefficients.
The number of coefficients is given by 2 * ar_coeff_lag * (ar_coeff_lag + 1) + !!num_y_points.
Definition at line 86 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::ar_coeff_shift |
Specifies the range of the auto-regressive coefficients.
Values of 6, 7, 8 and so on represent a range of [-2, 2), [-1, 1), [-0.5, 0.5) and so on. For AV1 must be between 6 and 9.
Definition at line 93 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::grain_scale_shift |
Signals the down shift applied to the generated gaussian numbers during synthesis.
Definition at line 99 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::uv_mult[2] |
Specifies the luma/chroma multipliers for the index to the component scaling function.
Definition at line 105 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::uv_mult_luma[2] |
Definition at line 106 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::uv_offset[2] |
Offset used for component scaling function.
For AV1 its a 9-bit value with a range [-256, 255]
Definition at line 112 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::overlap_flag |
Signals whether to overlap film grain blocks.
Definition at line 117 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
| int AVFilmGrainAOMParams::limit_output_range |
Signals to clip to limited color levels after film grain application.
Definition at line 122 of file film_grain_params.h.
Referenced by export_film_grain(), and libdav1d_receive_frame().
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