#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+
#include "avcodec.h"
+#include "dsputil.h"
#ifdef USE_FASTMEMCPY
#include "fastmemcpy.h"
}
}
-int img_convert_to_yuv420(UINT8 *img_out, UINT8 *img,
+/* XXX: use generic filter ? */
+/* 1x2 -> 1x1 */
+static void shrink2(UINT8 *dst, int dst_wrap,
+ UINT8 *src, int src_wrap,
+ int width, int height)
+{
+ int w;
+ UINT8 *s1, *s2, *d;
+
+ 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 */
+static void shrink22(UINT8 *dst, int dst_wrap,
+ UINT8 *src, int src_wrap,
+ int width, int height)
+{
+ int w;
+ UINT8 *s1, *s2, *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) >> 1;
+ d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 1;
+ d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 1;
+ d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 1;
+ s1 += 8;
+ s2 += 8;
+ d += 4;
+ }
+ for(;w > 0; w--) {
+ d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;
+ s1 += 2;
+ s2 += 2;
+ d++;
+ }
+ src += 2 * src_wrap;
+ dst += dst_wrap;
+ }
+}
+
+static void img_copy(UINT8 *dst, int dst_wrap,
+ UINT8 *src, int src_wrap,
+ int width, int height)
+{
+ for(;height > 0; height--) {
+ memcpy(dst, src, width);
+ dst += dst_wrap;
+ src += src_wrap;
+ }
+}
+
+#define SCALE_BITS 10
+
+#define C_Y (76309 >> (16 - SCALE_BITS))
+#define C_RV (117504 >> (16 - SCALE_BITS))
+#define C_BU (138453 >> (16 - SCALE_BITS))
+#define C_GU (13954 >> (16 - SCALE_BITS))
+#define C_GV (34903 >> (16 - SCALE_BITS))
+
+#define RGBOUT(r, g, b, y1)\
+{\
+ y = (y1 - 16) * C_Y;\
+ r = cm[(y + r_add) >> SCALE_BITS];\
+ g = cm[(y + g_add) >> SCALE_BITS];\
+ b = cm[(y + b_add) >> SCALE_BITS];\
+}
+
+/* XXX: no chroma interpolating is done */
+static void yuv420p_to_rgb24(AVPicture *dst, AVPicture *src,
+ int width, int height)
+{
+ UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
+ int w, y, cb, cr, r_add, g_add, b_add, width2;
+ UINT8 *cm = cropTbl + MAX_NEG_CROP;
+
+ d = dst->data[0];
+ y1_ptr = src->data[0];
+ cb_ptr = src->data[1];
+ cr_ptr = src->data[2];
+ width2 = width >> 1;
+ for(;height > 0; height -= 2) {
+ d1 = d;
+ d2 = d + dst->linesize[0];
+ y2_ptr = y1_ptr + src->linesize[0];
+ for(w = width2; w > 0; w --) {
+ cb = cb_ptr[0] - 128;
+ cr = cr_ptr[0] - 128;
+ r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
+ g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
+ b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
+
+ /* output 4 pixels */
+ RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
+ RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);
+ RGBOUT(d2[0], d2[1], d2[2], y2_ptr[0]);
+ RGBOUT(d2[3], d2[4], d2[5], y2_ptr[1]);
+
+ d1 += 6;
+ d2 += 6;
+ y1_ptr += 2;
+ y2_ptr += 2;
+ cb_ptr++;
+ cr_ptr++;
+ }
+ d += 2 * dst->linesize[0];
+ y1_ptr += 2 * src->linesize[0] - width;
+ cb_ptr += src->linesize[1] - width2;
+ cr_ptr += src->linesize[2] - width2;
+ }
+}
+
+/* XXX: no chroma interpolating is done */
+static void yuv422p_to_rgb24(AVPicture *dst, AVPicture *src,
+ int width, int height)
+{
+ UINT8 *y1_ptr, *cb_ptr, *cr_ptr, *d, *d1;
+ int w, y, cb, cr, r_add, g_add, b_add, width2;
+ UINT8 *cm = cropTbl + MAX_NEG_CROP;
+
+ d = dst->data[0];
+ y1_ptr = src->data[0];
+ cb_ptr = src->data[1];
+ cr_ptr = src->data[2];
+ width2 = width >> 1;
+ for(;height > 0; height --) {
+ d1 = d;
+ for(w = width2; w > 0; w --) {
+ cb = cb_ptr[0] - 128;
+ cr = cr_ptr[0] - 128;
+ r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
+ g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
+ b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
+
+ /* output 2 pixels */
+ RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
+ RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);
+
+ d1 += 6;
+ y1_ptr += 2;
+ cb_ptr++;
+ cr_ptr++;
+ }
+ d += dst->linesize[0];
+ y1_ptr += src->linesize[0] - width;
+ cb_ptr += src->linesize[1] - width2;
+ cr_ptr += src->linesize[2] - width2;
+ }
+}
+
+/* XXX: always use linesize. Return -1 if not supported */
+int img_convert(AVPicture *dst, int dst_pix_fmt,
+ AVPicture *src, int pix_fmt,
+ int width, int height)
+{
+ int i;
+
+ if (dst_pix_fmt == pix_fmt) {
+ switch(pix_fmt) {
+ case PIX_FMT_YUV420P:
+ for(i=0;i<3;i++) {
+ if (i == 1) {
+ width >>= 1;
+ height >>= 1;
+ }
+ img_copy(dst->data[i], dst->linesize[i],
+ src->data[i], src->linesize[i],
+ width, height);
+ }
+ break;
+ default:
+ return -1;
+ }
+ } else if (dst_pix_fmt == PIX_FMT_YUV420P) {
+
+ switch(pix_fmt) {
+ case PIX_FMT_YUV420P:
+ for(i=0;i<3;i++) {
+ img_copy(dst->data[i], dst->linesize[i],
+ src->data[i], src->linesize[i],
+ width, height);
+ }
+ break;
+ case PIX_FMT_YUV422P:
+ img_copy(dst->data[0], dst->linesize[0],
+ src->data[0], src->linesize[0],
+ width, height);
+ width >>= 1;
+ height >>= 1;
+ for(i=1;i<3;i++) {
+ shrink2(dst->data[i], dst->linesize[i],
+ src->data[i], src->linesize[i],
+ width, height);
+ }
+ break;
+ case PIX_FMT_YUV444P:
+ img_copy(dst->data[0], dst->linesize[0],
+ src->data[0], src->linesize[0],
+ width, height);
+ width >>= 1;
+ height >>= 1;
+ for(i=1;i<3;i++) {
+ shrink22(dst->data[i], dst->linesize[i],
+ src->data[i], src->linesize[i],
+ width, height);
+ }
+ break;
+ case PIX_FMT_YUV422:
+ yuv422_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
+ src->data[0], width, height);
+ break;
+ case PIX_FMT_RGB24:
+ rgb24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
+ src->data[0], width, height);
+ break;
+ case PIX_FMT_BGR24:
+ bgr24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
+ src->data[0], width, height);
+ break;
+ default:
+ return -1;
+ }
+ } else if (dst_pix_fmt == PIX_FMT_RGB24) {
+ switch(pix_fmt) {
+ case PIX_FMT_YUV420P:
+ yuv420p_to_rgb24(dst, src, width, height);
+ break;
+ case PIX_FMT_YUV422P:
+ yuv422p_to_rgb24(dst, src, width, height);
+ break;
+ default:
+ return -1;
+ }
+ } else {
+ return -1;
+ }
+ return 0;
+}
+
+/* filter parameters: [-1 4 2 4 -1] // 8 */
+static void deinterlace_line(UINT8 *dst, UINT8 *src, int src_wrap,
+ int size)
+{
+ UINT8 *cm = cropTbl + MAX_NEG_CROP;
+ int sum;
+ UINT8 *s;
+
+ for(;size > 0;size--) {
+ s = src;
+ sum = -s[0];
+ s += src_wrap;
+ sum += s[0] << 2;
+ s += src_wrap;
+ sum += s[0] << 1;
+ s += src_wrap;
+ sum += s[0] << 2;
+ s += src_wrap;
+ sum += -s[0];
+ dst[0] = cm[(sum + 4) >> 3];
+ dst++;
+ src++;
+ }
+}
+
+/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
+ top field is copied as is, but the bottom field is deinterlaced
+ against the top field. */
+static void deinterlace_bottom_field(UINT8 *dst, int dst_wrap,
+ UINT8 *src1, int src_wrap,
+ int width, int height)
+{
+ UINT8 *src, *ptr;
+ int y, y1, i;
+ UINT8 buf[5 * width];
+
+ src = src1;
+ for(y=0;y<height;y+=2) {
+ /* copy top field line */
+ memcpy(dst, src, width);
+ dst += dst_wrap;
+ src += (1 - 2) * src_wrap;
+ y1 = y - 2;
+ if (y1 >= 0 && (y1 + 4) < height) {
+ /* fast case : no edges */
+ deinterlace_line(dst, src, src_wrap, width);
+ } else {
+ /* in order to use the same function, we use an intermediate buffer */
+ ptr = buf;
+ for(i=0;i<5;i++) {
+ if (y1 < 0)
+ memcpy(ptr, src1, width);
+ else if (y1 >= height)
+ memcpy(ptr, src1 + (height - 1) * src_wrap, width);
+ else
+ memcpy(ptr, src1 + y1 * src_wrap, width);
+ y1++;
+ ptr += width;
+ }
+ deinterlace_line(dst, buf, width, width);
+ }
+ dst += dst_wrap;
+ src += (2 + 1) * src_wrap;
+ }
+}
+
+
+/* deinterlace, return -1 if format not handled */
+int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
int pix_fmt, int width, int height)
{
- UINT8 *pict;
- int size, size_out;
- UINT8 *picture[3];
-
- pict = img_out;
- size = width * height;
- size_out = (size * 3) / 2;
- picture[0] = pict;
- picture[1] = pict + size;
- picture[2] = picture[1] + (size / 4);
-
- switch(pix_fmt) {
- case PIX_FMT_YUV420P:
- memcpy(pict, img, size_out);
- break;
- case PIX_FMT_YUV422:
- yuv422_to_yuv420p(picture[0], picture[1], picture[2],
- img, width, height);
- break;
- case PIX_FMT_RGB24:
- rgb24_to_yuv420p(picture[0], picture[1], picture[2],
- img, width, height);
- break;
- case PIX_FMT_BGR24:
- bgr24_to_yuv420p(picture[0], picture[1], picture[2],
- img, width, height);
- break;
+ int i;
+
+ if (pix_fmt != PIX_FMT_YUV420P &&
+ pix_fmt != PIX_FMT_YUV422P &&
+ pix_fmt != PIX_FMT_YUV444P)
+ return -1;
+ if ((width & 1) != 0 || (height & 3) != 0)
+ return -1;
+
+ for(i=0;i<3;i++) {
+ if (i == 1) {
+ switch(pix_fmt) {
+ case PIX_FMT_YUV420P:
+ width >>= 1;
+ height >>= 1;
+ break;
+ case PIX_FMT_YUV422P:
+ width >>= 1;
+ break;
+ default:
+ break;
+ }
+ }
+ deinterlace_bottom_field(dst->data[i], dst->linesize[i],
+ src->data[i], src->linesize[i],
+ width, height);
}
- return size_out;
+ return 0;
}