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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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#include <malloc.h> |
#include <stdlib.h> |
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#include "../xvid.h" |
#include "../xvid.h" |
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#include "../portab.h" |
#include "../portab.h" |
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#include "../utils/emms.h" |
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/***************************************************************************** |
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* Private data type |
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****************************************************************************/ |
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typedef struct |
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{ |
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float *quant; |
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float *val; |
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} lumi_data_t; |
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/***************************************************************************** |
/***************************************************************************** |
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* Prototypes |
* Sub plugin functions |
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****************************************************************************/ |
****************************************************************************/ |
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static int |
static int lumi_plg_info(xvid_plg_info_t *info); |
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adaptive_quantization(unsigned char *buf, |
static int lumi_plg_create(xvid_plg_create_t *create, lumi_data_t **handle); |
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int stride, |
static int lumi_plg_destroy(lumi_data_t *handle, xvid_plg_destroy_t * destroy); |
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int *intquant, |
static int lumi_plg_frame(lumi_data_t *handle, xvid_plg_data_t *data); |
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int framequant, |
static int lumi_plg_after(lumi_data_t *handle, xvid_plg_data_t *data); |
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int min_quant, |
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int max_quant, |
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int mb_width, |
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int mb_height); |
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/***************************************************************************** |
/***************************************************************************** |
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* The plugin entry |
* The plugin entry function |
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****************************************************************************/ |
****************************************************************************/ |
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int |
int |
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xvid_plugin_lumimasking(void * handle, int opt, void * param1, void * param2) |
xvid_plugin_lumimasking(void * handle, int opt, void * param1, void * param2) |
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{ |
{ |
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switch(opt) |
switch(opt) { |
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{ |
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case XVID_PLG_INFO : |
case XVID_PLG_INFO : |
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return(lumi_plg_info((xvid_plg_info_t*)param1)); |
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case XVID_PLG_CREATE: |
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return(lumi_plg_create((xvid_plg_create_t *)param1, (lumi_data_t **)param2)); |
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case XVID_PLG_DESTROY: |
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return(lumi_plg_destroy((lumi_data_t *)handle, (xvid_plg_destroy_t*)param1)); |
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case XVID_PLG_BEFORE : |
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return 0; |
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case XVID_PLG_FRAME : |
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return(lumi_plg_frame((lumi_data_t *)handle, (xvid_plg_data_t *)param1)); |
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case XVID_PLG_AFTER : |
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return(lumi_plg_after((lumi_data_t *)handle, (xvid_plg_data_t *)param1)); |
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} |
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return(XVID_ERR_FAIL); |
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} |
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/*---------------------------------------------------------------------------- |
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* Info plugin function |
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*--------------------------------------------------------------------------*/ |
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static int |
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lumi_plg_info(xvid_plg_info_t *info) |
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{ |
{ |
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xvid_plg_info_t * info = (xvid_plg_info_t*)param1; |
/* We just require a diff quant array access */ |
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info->flags = XVID_REQDQUANTS; |
info->flags = XVID_REQDQUANTS; |
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return 0; |
return(0); |
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} |
} |
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case XVID_PLG_CREATE : |
/*---------------------------------------------------------------------------- |
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case XVID_PLG_DESTROY : |
* Create plugin function |
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return 0; |
* |
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* Allocates the private plugin data arrays |
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*--------------------------------------------------------------------------*/ |
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static int |
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lumi_plg_create(xvid_plg_create_t *create, lumi_data_t **handle) |
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{ |
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lumi_data_t *lumi; |
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case XVID_PLG_BEFORE : |
if ((lumi = (lumi_data_t*)malloc(sizeof(lumi_data_t))) == NULL) |
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return(XVID_ERR_MEMORY); |
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lumi->quant = (float*)malloc(create->mb_width*create->mb_height*sizeof(float)); |
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if (lumi->quant == NULL) { |
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free(lumi); |
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return(XVID_ERR_MEMORY); |
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} |
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lumi->val = (float*)malloc(create->mb_width*create->mb_height*sizeof(float)); |
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if (lumi->val == NULL) { |
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free(lumi->quant); |
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free(lumi); |
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return(XVID_ERR_MEMORY); |
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} |
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/* Bind the data structure to the handle */ |
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*handle = lumi; |
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return(0); |
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} |
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/*---------------------------------------------------------------------------- |
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* Destroy plugin function |
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* |
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* Free the private plugin data arrays |
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*--------------------------------------------------------------------------*/ |
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static int |
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lumi_plg_destroy(lumi_data_t *handle, xvid_plg_destroy_t *destroy) |
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{ |
{ |
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xvid_plg_data_t * data = (xvid_plg_data_t*)param1; |
if (handle) { |
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data->quant = |
if (handle->quant) { |
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adaptive_quantization(data->current.plane[0], |
free(handle->quant); |
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data->current.stride[0], |
handle->quant = NULL; |
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data->dquant, |
} |
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data->quant /* framequant*/, |
if (handle->val) { |
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data->quant /* min_quant */, |
free(handle->val); |
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data->quant*2 /* max_quant */, |
handle->val = NULL; |
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data->mb_width, |
} |
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data->mb_height); |
free(handle); |
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} |
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return(0); |
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} |
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return 0; |
/*---------------------------------------------------------------------------- |
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* Before plugin function |
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* |
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* Here is all the magic about lumimasking. |
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*--------------------------------------------------------------------------*/ |
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/* Helper function defined later */ |
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static int normalize_quantizer_field(float *in, |
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int *out, |
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int num, |
156 |
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int min_quant, |
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int max_quant); |
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static int |
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lumi_plg_frame(lumi_data_t *handle, xvid_plg_data_t *data) |
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{ |
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int i, j; |
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float global = 0.0f; |
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const float DarkAmpl = 14 / 4; |
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const float BrightAmpl = 10 / 3; |
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float DarkThres = 90; |
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float BrightThres = 200; |
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const float GlobalDarkThres = 60; |
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const float GlobalBrightThres = 170; |
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if (data->type == XVID_TYPE_BVOP) return 0; |
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/* Do this for all macroblocks individually */ |
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for (j = 0; j < data->mb_height; j++) { |
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for (i = 0; i < data->mb_width; i++) { |
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int k, l, sum = 0; |
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unsigned char *ptr; |
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/* Initialize the current quant value to the frame quant */ |
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handle->quant[j*data->mb_width + i] = (float)data->quant; |
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/* Next steps compute the luminance-masking */ |
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/* Get the MB address */ |
188 |
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ptr = data->current.plane[0]; |
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ptr += 16*j*data->current.stride[0] + 16*i; |
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191 |
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/* Accumulate luminance */ |
192 |
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for (k = 0; k < 16; k++) |
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for (l = 0; l < 16; l++) |
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sum += ptr[k*data->current.stride[0] + l]; |
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196 |
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handle->val[j*data->mb_width + i] = (float)sum/256.0f; |
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/* Accumulate the global frame luminance */ |
199 |
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global += (float)sum/256.0f; |
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} |
201 |
} |
} |
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203 |
case XVID_PLG_AFTER : |
/* Normalize the global luminance accumulator */ |
204 |
return 0; |
global /= data->mb_width*data->mb_height; |
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206 |
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DarkThres = DarkThres*global/127.0f; |
207 |
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BrightThres = BrightThres*global/127.0f; |
208 |
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209 |
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210 |
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/* Apply luminance masking only to frames where the global luminance is |
211 |
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* higher than DarkThreshold and lower than Bright Threshold */ |
212 |
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if ((global < GlobalBrightThres) && (global > GlobalDarkThres)) { |
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214 |
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/* Apply the luminance masking formulas to all MBs */ |
215 |
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for (i = 0; i < data->mb_height; i++) { |
216 |
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for (j = 0; j < data->mb_width; j++) { |
217 |
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if (handle->val[i*data->mb_width + j] < DarkThres) |
218 |
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handle->quant[i*data->mb_width + j] *= 1 + DarkAmpl * (DarkThres - handle->val[i*data->mb_width + j]) / DarkThres; |
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else if (handle->val[i*data->mb_width + j] > BrightThres) |
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handle->quant[i*data->mb_width + j] *= 1 + BrightAmpl * (handle->val[i*data->mb_width + j] - BrightThres) / (255 - BrightThres); |
221 |
} |
} |
222 |
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} |
223 |
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} |
224 |
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225 |
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/* Normalize the quantizer field */ |
226 |
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data->quant = normalize_quantizer_field(handle->quant, |
227 |
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data->dquant, |
228 |
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data->mb_width*data->mb_height, |
229 |
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data->quant, |
230 |
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data->quant + data->quant/2); |
231 |
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232 |
return XVID_ERR_FAIL; |
/* Plugin job finished */ |
233 |
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return(0); |
234 |
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} |
235 |
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/*---------------------------------------------------------------------------- |
237 |
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* After plugin function (dummy function) |
238 |
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*--------------------------------------------------------------------------*/ |
239 |
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240 |
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static int |
241 |
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lumi_plg_after(lumi_data_t *handle, xvid_plg_data_t *data) |
242 |
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{ |
243 |
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return(0); |
244 |
} |
} |
245 |
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246 |
/***************************************************************************** |
/***************************************************************************** |
295 |
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296 |
return (int) (in[0] + 0.5); |
return (int) (in[0] + 0.5); |
297 |
} |
} |
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static int |
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adaptive_quantization(unsigned char *buf, |
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int stride, |
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int *intquant, |
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int framequant, |
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int min_quant, |
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int max_quant, |
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int mb_width, |
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int mb_height) /* no qstride because normalization */ |
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{ |
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int i, j, k, l; |
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float *quant; |
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unsigned char *ptr; |
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float *val; |
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float global = 0.; |
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uint32_t mid_range = 0; |
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const float DarkAmpl = 14 / 2; |
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const float BrightAmpl = 10 / 2; |
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const float DarkThres = 70; |
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const float BrightThres = 200; |
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const float GlobalDarkThres = 60; |
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const float GlobalBrightThres = 170; |
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const float MidRangeThres = 20; |
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const float UpperLimit = 200; |
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const float LowerLimit = 25; |
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if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float)))) |
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return(-1); |
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if(!(val = (float *) malloc(mb_width * mb_height * sizeof(float)))) |
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return(-1); |
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for (k = 0; k < mb_height; k++) { |
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for (l = 0; l < mb_width; l++) /* do this for all macroblocks individually */ |
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{ |
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quant[k * mb_width + l] = (float) framequant; |
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/* calculate luminance-masking */ |
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ptr = &buf[16 * k * stride + 16 * l]; /* address of MB */ |
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val[k * mb_width + l] = 0.; |
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for (i = 0; i < 16; i++) |
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for (j = 0; j < 16; j++) |
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val[k * mb_width + l] += ptr[i * stride + j]; |
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val[k * mb_width + l] /= 256.; |
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global +=val[k * mb_width + l]; |
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if ((val[k * mb_width + l] > LowerLimit) && |
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(val[k * mb_width + l] < UpperLimit)) |
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mid_range++; |
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} |
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} |
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global /=mb_width * mb_height; |
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if (((global <GlobalBrightThres) &&(global >GlobalDarkThres)) |
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|| (mid_range < MidRangeThres)) { |
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for (k = 0; k < mb_height; k++) { |
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for (l = 0; l < mb_width; l++) /* do this for all macroblocks individually */ |
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{ |
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if (val[k * mb_width + l] < DarkThres) |
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quant[k * mb_width + l] += |
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DarkAmpl * (DarkThres - |
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val[k * mb_width + l]) / DarkThres; |
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else if (val[k * mb_width + l] > BrightThres) |
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quant[k * mb_width + l] += |
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BrightAmpl * (val[k * mb_width + l] - |
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BrightThres) / (255 - BrightThres); |
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} |
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} |
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} |
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i = normalize_quantizer_field(quant, intquant, |
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mb_width * mb_height, |
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min_quant, max_quant); |
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free(val); |
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free(quant); |
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return(i); |
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} |
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