diff options
Diffstat (limited to 'libvo/gl_common.c')
| -rw-r--r-- | libvo/gl_common.c | 86 |
1 files changed, 74 insertions, 12 deletions
diff --git a/libvo/gl_common.c b/libvo/gl_common.c index aa34521802..0d75b026e8 100644 --- a/libvo/gl_common.c +++ b/libvo/gl_common.c @@ -861,6 +861,36 @@ static void gen_spline_lookup_tex(GL *gl, GLenum unit) free(tex); } +#define NOISE_RES 2048 + +/** + * \brief creates the 1D lookup texture needed to generate pseudo-random numbers. + * \param unit texture unit to attach texture to + */ +static void gen_noise_lookup_tex(GL *gl, GLenum unit) { + GLfloat *tex = calloc(NOISE_RES, sizeof(*tex)); + uint32_t lcg = 0x79381c11; + int i; + for (i = 0; i < NOISE_RES; i++) + tex[i] = (double)i / (NOISE_RES - 1); + for (i = 0; i < NOISE_RES - 1; i++) { + int remain = NOISE_RES - i; + int idx = i + (lcg >> 16) % remain; + GLfloat tmp = tex[i]; + tex[i] = tex[idx]; + tex[idx] = tmp; + lcg = lcg * 1664525 + 1013904223; + } + gl->ActiveTexture(unit); + gl->TexImage1D(GL_TEXTURE_1D, 0, 1, NOISE_RES, 0, GL_RED, GL_FLOAT, tex); + gl->TexParameterf(GL_TEXTURE_1D, GL_TEXTURE_PRIORITY, 1.0); + gl->TexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + gl->TexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + gl->TexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT); + gl->ActiveTexture(GL_TEXTURE0); + free(tex); +} + #define SAMPLE(dest, coord, texture) \ "TEX textemp, " coord ", " texture ", $tex_type;\n" \ "MOV " dest ", textemp.r;\n" @@ -994,8 +1024,7 @@ static const char *yuv_prog_template = "TEMP res;\n" "MAD res.rgb, yuv.rrrr, ycoef, offsets;\n" "MAD res.rgb, yuv.gggg, ucoef, res;\n" - "MAD result.color.rgb, yuv.bbbb, vcoef, res;\n" - "END"; + "MAD res.rgb, yuv.bbbb, vcoef, res;\n"; static const char *yuv_pow_prog_template = "PARAM ycoef = {$cm11, $cm21, $cm31};\n" @@ -1007,10 +1036,9 @@ static const char *yuv_pow_prog_template = "MAD res.rgb, yuv.rrrr, ycoef, offsets;\n" "MAD res.rgb, yuv.gggg, ucoef, res;\n" "MAD_SAT res.rgb, yuv.bbbb, vcoef, res;\n" - "POW result.color.r, res.r, gamma.r;\n" - "POW result.color.g, res.g, gamma.g;\n" - "POW result.color.b, res.b, gamma.b;\n" - "END"; + "POW res.r, res.r, gamma.r;\n" + "POW res.g, res.g, gamma.g;\n" + "POW res.b, res.b, gamma.b;\n"; static const char *yuv_lookup_prog_template = "PARAM ycoef = {$cm11, $cm21, $cm31, 0};\n" @@ -1021,16 +1049,23 @@ static const char *yuv_lookup_prog_template = "MAD res, yuv.rrrr, ycoef, offsets;\n" "MAD res.rgb, yuv.gggg, ucoef, res;\n" "MAD res.rgb, yuv.bbbb, vcoef, res;\n" - "TEX result.color.r, res.raaa, texture[$conv_tex0], 2D;\n" + "TEX res.r, res.raaa, texture[$conv_tex0], 2D;\n" "ADD res.a, res.a, 0.25;\n" - "TEX result.color.g, res.gaaa, texture[$conv_tex0], 2D;\n" + "TEX res.g, res.gaaa, texture[$conv_tex0], 2D;\n" "ADD res.a, res.a, 0.25;\n" - "TEX result.color.b, res.baaa, texture[$conv_tex0], 2D;\n" - "END"; + "TEX res.b, res.baaa, texture[$conv_tex0], 2D;\n"; static const char *yuv_lookup3d_prog_template = - "TEX result.color, yuv, texture[$conv_tex0], 3D;\n" - "END"; + "TEMP res;\n" + "TEX res, yuv, texture[$conv_tex0], 3D;\n"; + +static const char *noise_filt_template = + "MUL coord.xy, fragment.texcoord[0], {$noise_sx, $noise_sy};\n" + "TEMP rand;\n" + "TEX rand.r, coord.x, texture[$noise_filt_tex], 1D;\n" + "ADD rand.r, rand.r, coord.y;\n" + "TEX rand.r, rand.r, texture[$noise_filt_tex], 1D;\n" + "MAD res.rgb, rand.rrrr, {$noise_str, $noise_str, $noise_str}, res;\n"; /** * \brief creates and initializes helper textures needed for scaling texture read @@ -1275,10 +1310,12 @@ static void glSetupYUVFragprog(GL *gl, gl_conversion_params_t *params) char lum_scale_texs[1]; char chrom_scale_texs[1]; char conv_texs[1]; + char filt_texs[1] = {0}; GLint i; // this is the conversion matrix, with y, u, v factors // for red, green, blue and the constant offsets float yuv2rgb[3][4]; + int noise = params->noise_strength != 0; create_conv_textures(gl, params, &cur_texu, conv_texs); create_scaler_textures(gl, YUV_LUM_SCALER(type), &cur_texu, lum_scale_texs); if (YUV_CHROM_SCALER(type) == YUV_LUM_SCALER(type)) @@ -1286,6 +1323,12 @@ static void glSetupYUVFragprog(GL *gl, gl_conversion_params_t *params) else create_scaler_textures(gl, YUV_CHROM_SCALER(type), &cur_texu, chrom_scale_texs); + + if (noise) { + gen_noise_lookup_tex(gl, cur_texu); + filt_texs[0] = '0' + cur_texu++; + } + gl->GetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &i); if (i < cur_texu) mp_msg(MSGT_VO, MSGL_ERR, @@ -1334,6 +1377,25 @@ static void glSetupYUVFragprog(GL *gl, gl_conversion_params_t *params) replace_var_float(prog, "gamma_g", (float)1.0 / params->csp_params.ggamma); replace_var_float(prog, "gamma_b", (float)1.0 / params->csp_params.bgamma); replace_var_char(prog, "conv_tex0", conv_texs[0]); + + if (noise) { + // 1.0 strength is suitable for dithering 8 to 6 bit + double str = params->noise_strength * (1.0 / 64); + double scale_x = (double)NOISE_RES / texw; + double scale_y = (double)NOISE_RES / texh; + if (rect) { + scale_x /= texw; + scale_y /= texh; + } + append_template(prog, noise_filt_template); + replace_var_float(prog, "noise_sx", scale_x); + replace_var_float(prog, "noise_sy", scale_y); + replace_var_char(prog, "noise_filt_tex", filt_texs[0]); + replace_var_float(prog, "noise_str", str); + } + + append_template(prog, "MOV result.color.rgb, res;\nEND"); + mp_msg(MSGT_VO, MSGL_DBG2, "[gl] generated fragment program:\n%s\n", yuv_prog); loadGPUProgram(gl, GL_FRAGMENT_PROGRAM, yuv_prog); |