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Update SDK/documentation

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This commit is contained in:
twinaphex 2015-01-08 19:23:59 +01:00
parent c72fdcf1c3
commit 2779298371
4 changed files with 80 additions and 31 deletions
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7
libretro-sdk/gfx/scaler/pixconv.c
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@ -749,6 +749,7 @@ void conv_argb8888_abgr8888(void *output_, const void *input_,
#define YUV_MAT_U_B (113)
#define YUV_MAT_V_R (90)
#define YUV_MAT_V_G (-46)
#if defined(__SSE2__)
void conv_yuyv_argb8888(void *output_, const void *input_,
int width, int height,
@ -920,12 +921,12 @@ void conv_copy(void *output_, const void *input_,
{
int h;
int copy_len = abs(out_stride);
if (abs(in_stride) < copy_len)
copy_len = abs(in_stride);
const uint8_t *input = (const uint8_t*)input_;
uint8_t *output = (uint8_t*)output_;
if (abs(in_stride) < copy_len)
copy_len = abs(in_stride);
for (h = 0; h < height;
h++, output += out_stride, input += in_stride)
memcpy(output, input, copy_len);

69
libretro-sdk/gfx/scaler/scaler_filter.c
View File

@ -38,7 +38,8 @@ static bool allocate_filters(struct scaler_ctx *ctx)
return ctx->horiz.filter && ctx->vert.filter;
}
static void gen_filter_point_sub(struct scaler_filter *filter, int len, int pos, int step)
static void gen_filter_point_sub(struct scaler_filter *filter,
int len, int pos, int step)
{
int i;
for (i = 0; i < len; i++, pos += step)
@ -50,6 +51,8 @@ static void gen_filter_point_sub(struct scaler_filter *filter, int len, int pos,
static bool gen_filter_point(struct scaler_ctx *ctx)
{
int x_pos, x_step, y_pos, y_step;
ctx->horiz.filter_len = 1;
ctx->horiz.filter_stride = 1;
ctx->vert.filter_len = 1;
@ -58,10 +61,10 @@ static bool gen_filter_point(struct scaler_ctx *ctx)
if (!allocate_filters(ctx))
return false;
int x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
int x_step = (1 << 16) * ctx->in_width / ctx->out_width;
int y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
int y_step = (1 << 16) * ctx->in_height / ctx->out_height;
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
x_step = (1 << 16) * ctx->in_width / ctx->out_width;
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
y_step = (1 << 16) * ctx->in_height / ctx->out_height;
gen_filter_point_sub(&ctx->horiz, ctx->out_width, x_pos, x_step);
gen_filter_point_sub(&ctx->vert, ctx->out_height, y_pos, y_step);
@ -71,7 +74,8 @@ static bool gen_filter_point(struct scaler_ctx *ctx)
return true;
}
static void gen_filter_bilinear_sub(struct scaler_filter *filter, int len, int pos, int step)
static void gen_filter_bilinear_sub(struct scaler_filter *filter,
int len, int pos, int step)
{
int i;
for (i = 0; i < len; i++, pos += step)
@ -84,6 +88,8 @@ static void gen_filter_bilinear_sub(struct scaler_filter *filter, int len, int p
static bool gen_filter_bilinear(struct scaler_ctx *ctx)
{
int x_pos, x_step, y_pos, y_step;
ctx->horiz.filter_len = 2;
ctx->horiz.filter_stride = 2;
ctx->vert.filter_len = 2;
@ -92,10 +98,10 @@ static bool gen_filter_bilinear(struct scaler_ctx *ctx)
if (!allocate_filters(ctx))
return false;
int x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
int x_step = (1 << 16) * ctx->in_width / ctx->out_width;
int y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
int y_step = (1 << 16) * ctx->in_height / ctx->out_height;
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
x_step = (1 << 16) * ctx->in_width / ctx->out_width;
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
y_step = (1 << 16) * ctx->in_height / ctx->out_height;
gen_filter_bilinear_sub(&ctx->horiz, ctx->out_width, x_pos, x_step);
gen_filter_bilinear_sub(&ctx->vert, ctx->out_height, y_pos, y_step);
@ -110,7 +116,8 @@ static inline double filter_sinc(double phase)
return sin(phase) / phase;
}
static void gen_filter_sinc_sub(struct scaler_filter *filter, int len, int pos, int step, double phase_mul)
static void gen_filter_sinc_sub(struct scaler_filter *filter,
int len, int pos, int step, double phase_mul)
{
int i, j;
const int sinc_size = filter->filter_len;
@ -135,8 +142,13 @@ static void gen_filter_sinc_sub(struct scaler_filter *filter, int len, int pos,
static bool gen_filter_sinc(struct scaler_ctx *ctx)
{
// Need to expand the filter when downsampling to get a proper low-pass effect.
const int sinc_size = 8 * (ctx->in_width > ctx->out_width ? next_pow2(ctx->in_width / ctx->out_width) : 1);
int x_pos, x_step, y_pos, y_step;
double phase_mul_horiz, phase_mul_vert;
/* Need to expand the filter when downsampling
* to get a proper low-pass effect. */
const int sinc_size = 8 * ((ctx->in_width > ctx->out_width)
? next_pow2(ctx->in_width / ctx->out_width) : 1);
ctx->horiz.filter_len = sinc_size;
ctx->horiz.filter_stride = sinc_size;
ctx->vert.filter_len = sinc_size;
@ -145,13 +157,13 @@ static bool gen_filter_sinc(struct scaler_ctx *ctx)
if (!allocate_filters(ctx))
return false;
int x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15) - (sinc_size << 15);
int x_step = (1 << 16) * ctx->in_width / ctx->out_width;
int y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15) - (sinc_size << 15);
int y_step = (1 << 16) * ctx->in_height / ctx->out_height;
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15) - (sinc_size << 15);
x_step = (1 << 16) * ctx->in_width / ctx->out_width;
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15) - (sinc_size << 15);
y_step = (1 << 16) * ctx->in_height / ctx->out_height;
double phase_mul_horiz = ctx->in_width > ctx->out_width ? (double)ctx->out_width / ctx->in_width : 1.0;
double phase_mul_vert = ctx->in_height > ctx->out_height ? (double)ctx->out_height / ctx->in_height : 1.0;
phase_mul_horiz = ctx->in_width > ctx->out_width ? (double)ctx->out_width / ctx->in_width : 1.0;
phase_mul_vert = ctx->in_height > ctx->out_height ? (double)ctx->out_height / ctx->in_height : 1.0;
gen_filter_sinc_sub(&ctx->horiz, ctx->out_width, x_pos, x_step, phase_mul_horiz);
gen_filter_sinc_sub(&ctx->vert, ctx->out_height, y_pos, y_step, phase_mul_vert);
@ -163,7 +175,9 @@ static bool gen_filter_sinc(struct scaler_ctx *ctx)
static bool validate_filter(struct scaler_ctx *ctx)
{
int i;
int max_h_pos;
int max_w_pos = ctx->in_width - ctx->horiz.filter_len;
for (i = 0; i < ctx->out_width; i++)
{
if (ctx->horiz.filter_pos[i] > max_w_pos || ctx->horiz.filter_pos[i] < 0)
@ -173,7 +187,8 @@ static bool validate_filter(struct scaler_ctx *ctx)
}
}
int max_h_pos = ctx->in_height - ctx->vert.filter_len;
max_h_pos = ctx->in_height - ctx->vert.filter_len;
for (i = 0; i < ctx->out_height; i++)
{
if (ctx->vert.filter_pos[i] > max_h_pos || ctx->vert.filter_pos[i] < 0)
@ -198,36 +213,40 @@ static void fixup_filter_sub(struct scaler_filter *filter, int out_len, int in_l
if (postsample > 0)
{
int16_t *base_filter = NULL;
filter->filter_pos[i] -= postsample;
int16_t *base_filter = filter->filter + i * filter->filter_stride;
base_filter = filter->filter + i * filter->filter_stride;
if (postsample > (int)filter->filter_len)
memset(base_filter, 0, filter->filter_len * sizeof(int16_t));
else
{
memmove(base_filter + postsample, base_filter, (filter->filter_len - postsample) * sizeof(int16_t));
memmove(base_filter + postsample, base_filter,
(filter->filter_len - postsample) * sizeof(int16_t));
memset(base_filter, 0, postsample * sizeof(int16_t));
}
}
if (presample > 0)
{
int16_t *base_filter = NULL;
filter->filter_pos[i] += presample;
int16_t *base_filter = filter->filter + i * filter->filter_stride;
base_filter = filter->filter + i * filter->filter_stride;
if (presample > (int)filter->filter_len)
memset(base_filter, 0, filter->filter_len * sizeof(int16_t));
else
{
memmove(base_filter, base_filter + presample, (filter->filter_len - presample) * sizeof(int16_t));
memmove(base_filter, base_filter + presample,
(filter->filter_len - presample) * sizeof(int16_t));
memset(base_filter + (filter->filter_len - presample), 0, presample * sizeof(int16_t));
}
}
}
}
// Makes sure that we never sample outside our rectangle.
/* Makes sure that we never sample outside our rectangle. */
static void fixup_filter(struct scaler_ctx *ctx)
{
fixup_filter_sub(&ctx->horiz, ctx->out_width, ctx->in_width);

9
libretro-sdk/gfx/scaler/scaler_int.c
View File

@ -251,20 +251,23 @@ void scaler_argb8888_point_special(const struct scaler_ctx *ctx,
int in_width, int in_height,
int out_stride, int in_stride)
{
const uint32_t *input = NULL;
uint32_t *output = NULL;
int h, w;
(void)ctx;
int x_pos = (1 << 15) * in_width / out_width - (1 << 15);
int x_step = (1 << 16) * in_width / out_width;
int y_pos = (1 << 15) * in_height / out_height - (1 << 15);
int y_step = (1 << 16) * in_height / out_height;
(void)ctx;
if (x_pos < 0)
x_pos = 0;
if (y_pos < 0)
y_pos = 0;
const uint32_t *input = (const uint32_t*)input_;
uint32_t *output = (uint32_t*)output_;
input = (const uint32_t*)input_;
output = (uint32_t*)output_;
for (h = 0; h < out_height; h++, y_pos += y_step, output += out_stride >> 2)
{

26
libretro-sdk/include/gfx/scaler/scaler.h
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@ -111,12 +111,38 @@ struct scaler_ctx
};
bool scaler_ctx_gen_filter(struct scaler_ctx *ctx);
void scaler_ctx_gen_reset(struct scaler_ctx *ctx);
/**
* scaler_ctx_scale:
* @ctx : pointer to scaler context object.
* @output : pointer to output image.
* @input : pointer to input image.
*
* Scales an input image to an output image.
**/
void scaler_ctx_scale(struct scaler_ctx *ctx,
void *output, const void *input);
/**
* scaler_alloc:
* @elem_size : size of the elements to be used.
* @siz : size of the image that the scaler needs to handle.
*
* Allocate and returns a scaler object.
*
* Returns: pointer to a scaler object of type 'void *' on success,
* NULL in case of error. Has to be freed manually.
**/
void *scaler_alloc(size_t elem_size, size_t size);
/**
* scaler_free:
* @ptr : pointer to scaler object.
*
* Frees a scaler object.
**/
void scaler_free(void *ptr);
#ifdef __cplusplus