const char *avcodec_get_pix_fmt_name(int pix_fmt)
{
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
- return "???";
+ return NULL;
else
return pix_fmt_info[pix_fmt].name;
}
for (i=0; i < PIX_FMT_NB; i++)
if (!strcmp(pix_fmt_info[i].name, name))
- break;
- return i;
+ return i;
+ return PIX_FMT_NONE;
}
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt)
{
- PixFmtInfo info= pix_fmt_info[pix_fmt];
-
- char is_alpha_char= info.is_alpha ? 'y' : 'n';
-
/* print header */
if (pix_fmt < 0)
snprintf (buf, buf_size,
"name " " nb_channels" " depth" " is_alpha"
);
- else
+ else{
+ PixFmtInfo info= pix_fmt_info[pix_fmt];
+
+ char is_alpha_char= info.is_alpha ? 'y' : 'n';
+
snprintf (buf, buf_size,
"%-10s" " %1d " " %2d " " %c ",
info.name,
info.depth,
is_alpha_char
);
+ }
}
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
- int pix_fmt, int width, int height)
+int ff_fill_linesize(AVPicture *picture, int pix_fmt, int width)
{
- int size, w2, h2, size2;
+ int w2;
const PixFmtInfo *pinfo;
- if(avcodec_check_dimensions(NULL, width, height))
- goto fail;
+ memset(picture->linesize, 0, sizeof(picture->linesize));
pinfo = &pix_fmt_info[pix_fmt];
- size = width * height;
switch(pix_fmt) {
case PIX_FMT_YUV420P:
case PIX_FMT_YUV422P:
case PIX_FMT_YUVJ444P:
case PIX_FMT_YUVJ440P:
w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;
- h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
- size2 = w2 * h2;
- picture->data[0] = ptr;
- picture->data[1] = picture->data[0] + size;
- picture->data[2] = picture->data[1] + size2;
- picture->data[3] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = w2;
picture->linesize[2] = w2;
- picture->linesize[3] = 0;
- return size + 2 * size2;
+ break;
case PIX_FMT_YUVA420P:
w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;
- h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
- size2 = w2 * h2;
- picture->data[0] = ptr;
- picture->data[1] = picture->data[0] + size;
- picture->data[2] = picture->data[1] + size2;
- picture->data[3] = picture->data[1] + size2 + size2;
picture->linesize[0] = width;
picture->linesize[1] = w2;
picture->linesize[2] = w2;
picture->linesize[3] = width;
- return 2 * size + 2 * size2;
+ break;
case PIX_FMT_NV12:
case PIX_FMT_NV21:
w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;
- h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
- size2 = w2 * h2 * 2;
- picture->data[0] = ptr;
- picture->data[1] = picture->data[0] + size;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = w2;
- picture->linesize[2] = 0;
- picture->linesize[3] = 0;
- return size + 2 * size2;
+ break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width * 3;
- return size * 3;
+ break;
case PIX_FMT_RGB32:
case PIX_FMT_BGR32:
case PIX_FMT_RGB32_1:
case PIX_FMT_BGR32_1:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width * 4;
- return size * 4;
+ break;
case PIX_FMT_GRAY16BE:
case PIX_FMT_GRAY16LE:
case PIX_FMT_BGR555:
case PIX_FMT_RGB555:
case PIX_FMT_RGB565:
case PIX_FMT_YUYV422:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width * 2;
- return size * 2;
+ break;
case PIX_FMT_UYVY422:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width * 2;
- return size * 2;
+ break;
case PIX_FMT_UYYVYY411:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width + width/2;
- return size + size/2;
+ break;
case PIX_FMT_RGB8:
case PIX_FMT_BGR8:
case PIX_FMT_RGB4_BYTE:
case PIX_FMT_BGR4_BYTE:
case PIX_FMT_GRAY8:
- picture->data[0] = ptr;
- picture->data[1] = NULL;
- picture->data[2] = NULL;
- picture->data[3] = NULL;
picture->linesize[0] = width;
- return size;
+ break;
case PIX_FMT_RGB4:
case PIX_FMT_BGR4:
+ picture->linesize[0] = width / 2;
+ break;
+ case PIX_FMT_MONOWHITE:
+ case PIX_FMT_MONOBLACK:
+ picture->linesize[0] = (width + 7) >> 3;
+ break;
+ case PIX_FMT_PAL8:
+ picture->linesize[0] = width;
+ picture->linesize[1] = 4;
+ break;
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, int pix_fmt,
+ int height)
+{
+ int size, h2, size2;
+ const PixFmtInfo *pinfo;
+
+ pinfo = &pix_fmt_info[pix_fmt];
+ size = picture->linesize[0] * height;
+ switch(pix_fmt) {
+ case PIX_FMT_YUV420P:
+ case PIX_FMT_YUV422P:
+ case PIX_FMT_YUV444P:
+ case PIX_FMT_YUV410P:
+ case PIX_FMT_YUV411P:
+ case PIX_FMT_YUV440P:
+ case PIX_FMT_YUVJ420P:
+ case PIX_FMT_YUVJ422P:
+ case PIX_FMT_YUVJ444P:
+ case PIX_FMT_YUVJ440P:
+ h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
+ size2 = picture->linesize[1] * h2;
picture->data[0] = ptr;
- picture->data[1] = NULL;
+ picture->data[1] = picture->data[0] + size;
+ picture->data[2] = picture->data[1] + size2;
+ picture->data[3] = NULL;
+ return size + 2 * size2;
+ case PIX_FMT_YUVA420P:
+ h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
+ size2 = picture->linesize[1] * h2;
+ picture->data[0] = ptr;
+ picture->data[1] = picture->data[0] + size;
+ picture->data[2] = picture->data[1] + size2;
+ picture->data[3] = picture->data[1] + size2 + size2;
+ return 2 * size + 2 * size2;
+ case PIX_FMT_NV12:
+ case PIX_FMT_NV21:
+ h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
+ size2 = picture->linesize[1] * h2 * 2;
+ picture->data[0] = ptr;
+ picture->data[1] = picture->data[0] + size;
picture->data[2] = NULL;
picture->data[3] = NULL;
- picture->linesize[0] = width / 2;
- return size / 2;
+ return size + 2 * size2;
+ case PIX_FMT_RGB24:
+ case PIX_FMT_BGR24:
+ case PIX_FMT_RGB32:
+ case PIX_FMT_BGR32:
+ case PIX_FMT_RGB32_1:
+ case PIX_FMT_BGR32_1:
+ case PIX_FMT_GRAY16BE:
+ case PIX_FMT_GRAY16LE:
+ case PIX_FMT_BGR555:
+ case PIX_FMT_BGR565:
+ case PIX_FMT_RGB555:
+ case PIX_FMT_RGB565:
+ case PIX_FMT_YUYV422:
+ case PIX_FMT_UYVY422:
+ case PIX_FMT_UYYVYY411:
+ case PIX_FMT_RGB8:
+ case PIX_FMT_BGR8:
+ case PIX_FMT_RGB4_BYTE:
+ case PIX_FMT_BGR4_BYTE:
+ case PIX_FMT_GRAY8:
+ case PIX_FMT_RGB4:
+ case PIX_FMT_BGR4:
case PIX_FMT_MONOWHITE:
case PIX_FMT_MONOBLACK:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
- picture->linesize[0] = (width + 7) >> 3;
- return picture->linesize[0] * height;
+ return size;
case PIX_FMT_PAL8:
size2 = (size + 3) & ~3;
picture->data[0] = ptr;
picture->data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */
picture->data[2] = NULL;
picture->data[3] = NULL;
- picture->linesize[0] = width;
- picture->linesize[1] = 4;
return size2 + 256 * 4;
default:
-fail:
picture->data[0] = NULL;
picture->data[1] = NULL;
picture->data[2] = NULL;
}
}
+int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+ int pix_fmt, int width, int height)
+{
+
+ if(avcodec_check_dimensions(NULL, width, height))
+ return -1;
+
+ if (ff_fill_linesize(picture, pix_fmt, width))
+ return -1;
+
+ return ff_fill_pointer(picture, ptr, pix_fmt, height);
+}
+
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
unsigned char *dest, int dest_size)
{
}
}
-int av_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
+int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
{
int bits;
const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
case FF_PIXEL_PLANAR:
for(i = 0; i < pf->nb_channels; i++) {
int w, h;
- int bwidth = av_get_plane_bytewidth(pix_fmt, width, i);
+ int bwidth = ff_get_plane_bytewidth(pix_fmt, width, i);
w = width;
h = height;
if (i == 1 || i == 2) {
}
}
-static uint8_t y_ccir_to_jpeg[256];
-static uint8_t y_jpeg_to_ccir[256];
-static uint8_t c_ccir_to_jpeg[256];
-static uint8_t c_jpeg_to_ccir[256];
-
-/* init various conversion tables */
-static void img_convert_init(void)
-{
- int i;
- uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
-
- for(i = 0;i < 256; i++) {
- y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG(i);
- y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR(i);
- c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG(i);
- c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR(i);
- }
-}
-
-/* apply to each pixel the given table */
-static void img_apply_table(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height, const uint8_t *table1)
+/* 2x2 -> 1x1 */
+void ff_shrink22(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
{
- int n;
- const uint8_t *s;
+ int w;
+ const uint8_t *s1, *s2;
uint8_t *d;
- const uint8_t *table;
- table = table1;
for(;height > 0; height--) {
- s = src;
+ s1 = src;
+ s2 = s1 + src_wrap;
d = dst;
- n = width;
- while (n >= 4) {
- d[0] = table[s[0]];
- d[1] = table[s[1]];
- d[2] = table[s[2]];
- d[3] = table[s[3]];
+ for(w = width;w >= 4; w-=4) {
+ d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
+ d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
+ d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
+ d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
+ s1 += 8;
+ s2 += 8;
d += 4;
- s += 4;
- n -= 4;
}
- while (n > 0) {
- d[0] = table[s[0]];
+ for(;w > 0; w--) {
+ d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
+ s1 += 2;
+ s2 += 2;
d++;
- s++;
- n--;
}
+ src += 2 * src_wrap;
dst += dst_wrap;
- src += src_wrap;
}
}
-/* XXX: use generic filter ? */
-/* XXX: in most cases, the sampling position is incorrect */
-
-/* 4x1 -> 1x1 */
-static void shrink41(uint8_t *dst, int dst_wrap,
+/* 4x4 -> 1x1 */
+void ff_shrink44(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w;
- const uint8_t *s;
+ const uint8_t *s1, *s2, *s3, *s4;
uint8_t *d;
for(;height > 0; height--) {
- s = src;
+ s1 = src;
+ s2 = s1 + src_wrap;
+ s3 = s2 + src_wrap;
+ s4 = s3 + src_wrap;
d = dst;
for(w = width;w > 0; w--) {
- d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;
- s += 4;
+ d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
+ s2[0] + s2[1] + s2[2] + s2[3] +
+ s3[0] + s3[1] + s3[2] + s3[3] +
+ s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
+ s1 += 4;
+ s2 += 4;
+ s3 += 4;
+ s4 += 4;
d++;
}
- src += src_wrap;
+ src += 4 * src_wrap;
dst += dst_wrap;
}
}
-/* 2x1 -> 1x1 */
-static void shrink21(uint8_t *dst, int dst_wrap,
+/* 8x8 -> 1x1 */
+void ff_shrink88(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
- int w;
- const uint8_t *s;
- uint8_t *d;
-
- for(;height > 0; height--) {
- s = src;
- d = dst;
- for(w = width;w > 0; w--) {
- d[0] = (s[0] + s[1]) >> 1;
- s += 2;
- d++;
- }
- src += src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 1x2 -> 1x1 */
-static void shrink12(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- int w;
- uint8_t *d;
- const uint8_t *s1, *s2;
-
- for(;height > 0; height--) {
- s1 = src;
- s2 = s1 + src_wrap;
- d = dst;
- for(w = width;w >= 4; w-=4) {
- d[0] = (s1[0] + s2[0]) >> 1;
- d[1] = (s1[1] + s2[1]) >> 1;
- d[2] = (s1[2] + s2[2]) >> 1;
- d[3] = (s1[3] + s2[3]) >> 1;
- s1 += 4;
- s2 += 4;
- d += 4;
- }
- for(;w > 0; w--) {
- d[0] = (s1[0] + s2[0]) >> 1;
- s1++;
- s2++;
- d++;
- }
- src += 2 * src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 2x2 -> 1x1 */
-void ff_shrink22(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- int w;
- const uint8_t *s1, *s2;
- uint8_t *d;
-
- for(;height > 0; height--) {
- s1 = src;
- s2 = s1 + src_wrap;
- d = dst;
- for(w = width;w >= 4; w-=4) {
- d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
- d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
- d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
- d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
- s1 += 8;
- s2 += 8;
- d += 4;
- }
- for(;w > 0; w--) {
- d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
- s1 += 2;
- s2 += 2;
- d++;
- }
- src += 2 * src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 4x4 -> 1x1 */
-void ff_shrink44(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- int w;
- const uint8_t *s1, *s2, *s3, *s4;
- uint8_t *d;
-
- for(;height > 0; height--) {
- s1 = src;
- s2 = s1 + src_wrap;
- s3 = s2 + src_wrap;
- s4 = s3 + src_wrap;
- d = dst;
- for(w = width;w > 0; w--) {
- d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
- s2[0] + s2[1] + s2[2] + s2[3] +
- s3[0] + s3[1] + s3[2] + s3[3] +
- s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
- s1 += 4;
- s2 += 4;
- s3 += 4;
- s4 += 4;
- d++;
- }
- src += 4 * src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 8x8 -> 1x1 */
-void ff_shrink88(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- int w, i;
+ int w, i;
for(;height > 0; height--) {
for(w = width;w > 0; w--) {
}
}
-static void grow21_line(uint8_t *dst, const uint8_t *src,
- int width)
-{
- int w;
- const uint8_t *s1;
- uint8_t *d;
-
- s1 = src;
- d = dst;
- for(w = width;w >= 4; w-=4) {
- d[1] = d[0] = s1[0];
- d[3] = d[2] = s1[1];
- s1 += 2;
- d += 4;
- }
- for(;w >= 2; w -= 2) {
- d[1] = d[0] = s1[0];
- s1 ++;
- d += 2;
- }
- /* only needed if width is not a multiple of two */
- /* XXX: veryfy that */
- if (w) {
- d[0] = s1[0];
- }
-}
-
-static void grow41_line(uint8_t *dst, const uint8_t *src,
- int width)
-{
- int w, v;
- const uint8_t *s1;
- uint8_t *d;
-
- s1 = src;
- d = dst;
- for(w = width;w >= 4; w-=4) {
- v = s1[0];
- d[0] = v;
- d[1] = v;
- d[2] = v;
- d[3] = v;
- s1 ++;
- d += 4;
- }
-}
-
-/* 1x1 -> 2x1 */
-static void grow21(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- for(;height > 0; height--) {
- grow21_line(dst, src, width);
- src += src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 1x1 -> 1x2 */
-static void grow12(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- for(;height > 0; height-=2) {
- memcpy(dst, src, width);
- dst += dst_wrap;
- memcpy(dst, src, width);
- dst += dst_wrap;
- src += src_wrap;
- }
-}
-
-/* 1x1 -> 2x2 */
-static void grow22(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- for(;height > 0; height--) {
- grow21_line(dst, src, width);
- if (height%2)
- src += src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 1x1 -> 4x1 */
-static void grow41(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- for(;height > 0; height--) {
- grow41_line(dst, src, width);
- src += src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 1x1 -> 4x4 */
-static void grow44(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- for(;height > 0; height--) {
- grow41_line(dst, src, width);
- if ((height & 3) == 1)
- src += src_wrap;
- dst += dst_wrap;
- }
-}
-
-/* 1x2 -> 2x1 */
-static void conv411(uint8_t *dst, int dst_wrap,
- const uint8_t *src, int src_wrap,
- int width, int height)
-{
- int w, c;
- const uint8_t *s1, *s2;
- uint8_t *d;
-
- width>>=1;
-
- for(;height > 0; height--) {
- s1 = src;
- s2 = src + src_wrap;
- d = dst;
- for(w = width;w > 0; w--) {
- c = (s1[0] + s2[0]) >> 1;
- d[0] = c;
- d[1] = c;
- s1++;
- s2++;
- d += 2;
- }
- src += src_wrap * 2;
- dst += dst_wrap;
- }
-}
-
/* XXX: add jpeg quantize code */
#define TRANSP_INDEX (6*6*6)
/* this is maybe slow, but allows for extensions */
static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)
{
- return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));
+ return (((r) / 47) % 6) * 6 * 6 + (((g) / 47) % 6) * 6 + (((b) / 47) % 6);
}
static void build_rgb_palette(uint8_t *palette, int has_alpha)
uint8_t *iptr = src->data[i];
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
(padleft >> x_shift);
- memcpy(optr, iptr, src->linesize[i]);
+ memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
iptr += src->linesize[i];
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
(dst->linesize[i] - (padright >> x_shift));
for (y = 0; y < yheight; y++) {
memset(optr, color[i], (padleft + padright) >> x_shift);
memcpy(optr + ((padleft + padright) >> x_shift), iptr,
- src->linesize[i]);
+ (width - padleft - padright) >> x_shift);
iptr += src->linesize[i];
optr += dst->linesize[i];
}
}
#endif
-#ifndef CONFIG_SWSCALER
+#ifndef CONFIG_SWSCALE
+static uint8_t y_ccir_to_jpeg[256];
+static uint8_t y_jpeg_to_ccir[256];
+static uint8_t c_ccir_to_jpeg[256];
+static uint8_t c_jpeg_to_ccir[256];
+
+/* init various conversion tables */
+static void img_convert_init(void)
+{
+ int i;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+
+ for(i = 0;i < 256; i++) {
+ y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG(i);
+ y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR(i);
+ c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG(i);
+ c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR(i);
+ }
+}
+
+/* apply to each pixel the given table */
+static void img_apply_table(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height, const uint8_t *table1)
+{
+ int n;
+ const uint8_t *s;
+ uint8_t *d;
+ const uint8_t *table;
+
+ table = table1;
+ for(;height > 0; height--) {
+ s = src;
+ d = dst;
+ n = width;
+ while (n >= 4) {
+ d[0] = table[s[0]];
+ d[1] = table[s[1]];
+ d[2] = table[s[2]];
+ d[3] = table[s[3]];
+ d += 4;
+ s += 4;
+ n -= 4;
+ }
+ while (n > 0) {
+ d[0] = table[s[0]];
+ d++;
+ s++;
+ n--;
+ }
+ dst += dst_wrap;
+ src += src_wrap;
+ }
+}
+
+/* XXX: use generic filter ? */
+/* XXX: in most cases, the sampling position is incorrect */
+
+/* 4x1 -> 1x1 */
+static void shrink41(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ int w;
+ const uint8_t *s;
+ uint8_t *d;
+
+ for(;height > 0; height--) {
+ s = src;
+ d = dst;
+ for(w = width;w > 0; w--) {
+ d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;
+ s += 4;
+ d++;
+ }
+ src += src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+/* 2x1 -> 1x1 */
+static void shrink21(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ int w;
+ const uint8_t *s;
+ uint8_t *d;
+
+ for(;height > 0; height--) {
+ s = src;
+ d = dst;
+ for(w = width;w > 0; w--) {
+ d[0] = (s[0] + s[1]) >> 1;
+ s += 2;
+ d++;
+ }
+ src += src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+/* 1x2 -> 1x1 */
+static void shrink12(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ int w;
+ uint8_t *d;
+ const uint8_t *s1, *s2;
+
+ for(;height > 0; height--) {
+ s1 = src;
+ s2 = s1 + src_wrap;
+ d = dst;
+ for(w = width;w >= 4; w-=4) {
+ d[0] = (s1[0] + s2[0]) >> 1;
+ d[1] = (s1[1] + s2[1]) >> 1;
+ d[2] = (s1[2] + s2[2]) >> 1;
+ d[3] = (s1[3] + s2[3]) >> 1;
+ s1 += 4;
+ s2 += 4;
+ d += 4;
+ }
+ for(;w > 0; w--) {
+ d[0] = (s1[0] + s2[0]) >> 1;
+ s1++;
+ s2++;
+ d++;
+ }
+ src += 2 * src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+static void grow21_line(uint8_t *dst, const uint8_t *src,
+ int width)
+{
+ int w;
+ const uint8_t *s1;
+ uint8_t *d;
+
+ s1 = src;
+ d = dst;
+ for(w = width;w >= 4; w-=4) {
+ d[1] = d[0] = s1[0];
+ d[3] = d[2] = s1[1];
+ s1 += 2;
+ d += 4;
+ }
+ for(;w >= 2; w -= 2) {
+ d[1] = d[0] = s1[0];
+ s1 ++;
+ d += 2;
+ }
+ /* only needed if width is not a multiple of two */
+ /* XXX: veryfy that */
+ if (w) {
+ d[0] = s1[0];
+ }
+}
+
+static void grow41_line(uint8_t *dst, const uint8_t *src,
+ int width)
+{
+ int w, v;
+ const uint8_t *s1;
+ uint8_t *d;
+
+ s1 = src;
+ d = dst;
+ for(w = width;w >= 4; w-=4) {
+ v = s1[0];
+ d[0] = v;
+ d[1] = v;
+ d[2] = v;
+ d[3] = v;
+ s1 ++;
+ d += 4;
+ }
+}
+
+/* 1x1 -> 2x1 */
+static void grow21(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ for(;height > 0; height--) {
+ grow21_line(dst, src, width);
+ src += src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+/* 1x1 -> 1x2 */
+static void grow12(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ for(;height > 0; height-=2) {
+ memcpy(dst, src, width);
+ dst += dst_wrap;
+ memcpy(dst, src, width);
+ dst += dst_wrap;
+ src += src_wrap;
+ }
+}
+
+/* 1x1 -> 2x2 */
+static void grow22(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ for(;height > 0; height--) {
+ grow21_line(dst, src, width);
+ if (height%2)
+ src += src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+/* 1x1 -> 4x1 */
+static void grow41(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ for(;height > 0; height--) {
+ grow41_line(dst, src, width);
+ src += src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+/* 1x1 -> 4x4 */
+static void grow44(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ for(;height > 0; height--) {
+ grow41_line(dst, src, width);
+ if ((height & 3) == 1)
+ src += src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+/* 1x2 -> 2x1 */
+static void conv411(uint8_t *dst, int dst_wrap,
+ const uint8_t *src, int src_wrap,
+ int width, int height)
+{
+ int w, c;
+ const uint8_t *s1, *s2;
+ uint8_t *d;
+
+ width>>=1;
+
+ for(;height > 0; height--) {
+ s1 = src;
+ s2 = src + src_wrap;
+ d = dst;
+ for(w = width;w > 0; w--) {
+ c = (s1[0] + s2[0]) >> 1;
+ d[0] = c;
+ d[1] = c;
+ s1++;
+ s2++;
+ d += 2;
+ }
+ src += src_wrap * 2;
+ dst += dst_wrap;
+ }
+}
+
/* XXX: always use linesize. Return -1 if not supported */
int img_convert(AVPicture *dst, int dst_pix_fmt,
const AVPicture *src, int src_pix_fmt,
projects / ffmpeg / blobdiff