mirror of
https://github.com/librempeg/librempeg
synced 2024-11-22 18:49:58 +00:00
added 422P, 444P support - added deinterlace support - added xxx to RGB24 convertion
Originally committed as revision 69 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard
parent
4af5e4ef5e
commit
85c242d800
@ -19,7 +19,9 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "avcodec.h"
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#include "dsputil.h"
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h"
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@ -182,36 +184,366 @@ static void bgr24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
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}
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}
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int img_convert_to_yuv420(UINT8 *img_out, UINT8 *img,
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/* XXX: use generic filter ? */
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/* 1x2 -> 1x1 */
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static void shrink2(UINT8 *dst, int dst_wrap,
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UINT8 *src, int src_wrap,
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int width, int height)
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{
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int w;
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UINT8 *s1, *s2, *d;
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for(;height > 0; height--) {
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s1 = src;
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s2 = s1 + src_wrap;
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d = dst;
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for(w = width;w >= 4; w-=4) {
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d[0] = (s1[0] + s2[0]) >> 1;
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d[1] = (s1[1] + s2[1]) >> 1;
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d[2] = (s1[2] + s2[2]) >> 1;
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d[3] = (s1[3] + s2[3]) >> 1;
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s1 += 4;
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s2 += 4;
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d += 4;
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}
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for(;w > 0; w--) {
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d[0] = (s1[0] + s2[0]) >> 1;
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s1++;
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s2++;
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d++;
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}
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src += 2 * src_wrap;
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dst += dst_wrap;
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}
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}
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/* 2x2 -> 1x1 */
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static void shrink22(UINT8 *dst, int dst_wrap,
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UINT8 *src, int src_wrap,
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int width, int height)
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{
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int w;
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UINT8 *s1, *s2, *d;
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for(;height > 0; height--) {
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s1 = src;
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s2 = s1 + src_wrap;
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d = dst;
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for(w = width;w >= 4; w-=4) {
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d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;
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d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 1;
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d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 1;
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d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 1;
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s1 += 8;
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s2 += 8;
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d += 4;
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}
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for(;w > 0; w--) {
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d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;
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s1 += 2;
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s2 += 2;
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d++;
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}
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src += 2 * src_wrap;
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dst += dst_wrap;
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}
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}
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static void img_copy(UINT8 *dst, int dst_wrap,
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UINT8 *src, int src_wrap,
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int width, int height)
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{
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for(;height > 0; height--) {
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memcpy(dst, src, width);
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dst += dst_wrap;
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src += src_wrap;
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}
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}
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#define SCALE_BITS 10
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#define C_Y (76309 >> (16 - SCALE_BITS))
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#define C_RV (117504 >> (16 - SCALE_BITS))
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#define C_BU (138453 >> (16 - SCALE_BITS))
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#define C_GU (13954 >> (16 - SCALE_BITS))
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#define C_GV (34903 >> (16 - SCALE_BITS))
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#define RGBOUT(r, g, b, y1)\
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{\
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y = (y1 - 16) * C_Y;\
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r = cm[(y + r_add) >> SCALE_BITS];\
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g = cm[(y + g_add) >> SCALE_BITS];\
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b = cm[(y + b_add) >> SCALE_BITS];\
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}
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/* XXX: no chroma interpolating is done */
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static void yuv420p_to_rgb24(AVPicture *dst, AVPicture *src,
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int width, int height)
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{
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UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
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int w, y, cb, cr, r_add, g_add, b_add, width2;
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UINT8 *cm = cropTbl + MAX_NEG_CROP;
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d = dst->data[0];
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y1_ptr = src->data[0];
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cb_ptr = src->data[1];
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cr_ptr = src->data[2];
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width2 = width >> 1;
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for(;height > 0; height -= 2) {
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d1 = d;
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d2 = d + dst->linesize[0];
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y2_ptr = y1_ptr + src->linesize[0];
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for(w = width2; w > 0; w --) {
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cb = cb_ptr[0] - 128;
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cr = cr_ptr[0] - 128;
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r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
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g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
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b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
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/* output 4 pixels */
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RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
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RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);
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RGBOUT(d2[0], d2[1], d2[2], y2_ptr[0]);
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RGBOUT(d2[3], d2[4], d2[5], y2_ptr[1]);
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d1 += 6;
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d2 += 6;
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y1_ptr += 2;
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y2_ptr += 2;
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cb_ptr++;
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cr_ptr++;
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}
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d += 2 * dst->linesize[0];
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y1_ptr += 2 * src->linesize[0] - width;
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cb_ptr += src->linesize[1] - width2;
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cr_ptr += src->linesize[2] - width2;
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}
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}
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/* XXX: no chroma interpolating is done */
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static void yuv422p_to_rgb24(AVPicture *dst, AVPicture *src,
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int width, int height)
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{
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UINT8 *y1_ptr, *cb_ptr, *cr_ptr, *d, *d1;
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int w, y, cb, cr, r_add, g_add, b_add, width2;
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UINT8 *cm = cropTbl + MAX_NEG_CROP;
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d = dst->data[0];
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y1_ptr = src->data[0];
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cb_ptr = src->data[1];
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cr_ptr = src->data[2];
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width2 = width >> 1;
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for(;height > 0; height --) {
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d1 = d;
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for(w = width2; w > 0; w --) {
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cb = cb_ptr[0] - 128;
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cr = cr_ptr[0] - 128;
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r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
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g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
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b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
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/* output 2 pixels */
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RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
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RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);
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d1 += 6;
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y1_ptr += 2;
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cb_ptr++;
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cr_ptr++;
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}
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d += dst->linesize[0];
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y1_ptr += src->linesize[0] - width;
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cb_ptr += src->linesize[1] - width2;
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cr_ptr += src->linesize[2] - width2;
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}
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}
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/* XXX: always use linesize. Return -1 if not supported */
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int img_convert(AVPicture *dst, int dst_pix_fmt,
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AVPicture *src, int pix_fmt,
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int width, int height)
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{
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int i;
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if (dst_pix_fmt == pix_fmt) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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for(i=0;i<3;i++) {
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if (i == 1) {
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width >>= 1;
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height >>= 1;
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}
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img_copy(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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default:
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return -1;
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}
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} else if (dst_pix_fmt == PIX_FMT_YUV420P) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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for(i=0;i<3;i++) {
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img_copy(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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case PIX_FMT_YUV422P:
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img_copy(dst->data[0], dst->linesize[0],
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src->data[0], src->linesize[0],
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width, height);
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width >>= 1;
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height >>= 1;
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for(i=1;i<3;i++) {
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shrink2(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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case PIX_FMT_YUV444P:
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img_copy(dst->data[0], dst->linesize[0],
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src->data[0], src->linesize[0],
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width, height);
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width >>= 1;
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height >>= 1;
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for(i=1;i<3;i++) {
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shrink22(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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case PIX_FMT_YUV422:
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yuv422_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
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src->data[0], width, height);
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break;
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case PIX_FMT_RGB24:
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rgb24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
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src->data[0], width, height);
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break;
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case PIX_FMT_BGR24:
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bgr24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
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src->data[0], width, height);
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break;
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default:
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return -1;
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}
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} else if (dst_pix_fmt == PIX_FMT_RGB24) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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yuv420p_to_rgb24(dst, src, width, height);
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break;
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case PIX_FMT_YUV422P:
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yuv422p_to_rgb24(dst, src, width, height);
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break;
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default:
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return -1;
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}
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} else {
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return -1;
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}
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return 0;
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}
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/* filter parameters: [-1 4 2 4 -1] // 8 */
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static void deinterlace_line(UINT8 *dst, UINT8 *src, int src_wrap,
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int size)
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{
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UINT8 *cm = cropTbl + MAX_NEG_CROP;
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int sum;
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UINT8 *s;
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for(;size > 0;size--) {
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s = src;
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sum = -s[0];
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s += src_wrap;
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sum += s[0] << 2;
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s += src_wrap;
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sum += s[0] << 1;
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s += src_wrap;
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sum += s[0] << 2;
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s += src_wrap;
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sum += -s[0];
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dst[0] = cm[(sum + 4) >> 3];
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dst++;
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src++;
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}
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}
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/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
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top field is copied as is, but the bottom field is deinterlaced
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against the top field. */
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static void deinterlace_bottom_field(UINT8 *dst, int dst_wrap,
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UINT8 *src1, int src_wrap,
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int width, int height)
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{
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UINT8 *src, *ptr;
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int y, y1, i;
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UINT8 buf[5 * width];
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src = src1;
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for(y=0;y<height;y+=2) {
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/* copy top field line */
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memcpy(dst, src, width);
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dst += dst_wrap;
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src += (1 - 2) * src_wrap;
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y1 = y - 2;
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if (y1 >= 0 && (y1 + 4) < height) {
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/* fast case : no edges */
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deinterlace_line(dst, src, src_wrap, width);
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} else {
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/* in order to use the same function, we use an intermediate buffer */
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ptr = buf;
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for(i=0;i<5;i++) {
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if (y1 < 0)
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memcpy(ptr, src1, width);
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else if (y1 >= height)
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memcpy(ptr, src1 + (height - 1) * src_wrap, width);
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else
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memcpy(ptr, src1 + y1 * src_wrap, width);
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y1++;
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ptr += width;
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}
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deinterlace_line(dst, buf, width, width);
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}
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dst += dst_wrap;
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src += (2 + 1) * src_wrap;
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}
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}
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/* deinterlace, return -1 if format not handled */
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int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
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int pix_fmt, int width, int height)
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{
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UINT8 *pict;
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int size, size_out;
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UINT8 *picture[3];
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int i;
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pict = img_out;
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size = width * height;
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size_out = (size * 3) / 2;
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picture[0] = pict;
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picture[1] = pict + size;
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picture[2] = picture[1] + (size / 4);
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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memcpy(pict, img, size_out);
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break;
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case PIX_FMT_YUV422:
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yuv422_to_yuv420p(picture[0], picture[1], picture[2],
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img, width, height);
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break;
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case PIX_FMT_RGB24:
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rgb24_to_yuv420p(picture[0], picture[1], picture[2],
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img, width, height);
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break;
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case PIX_FMT_BGR24:
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bgr24_to_yuv420p(picture[0], picture[1], picture[2],
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img, width, height);
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break;
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if (pix_fmt != PIX_FMT_YUV420P &&
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pix_fmt != PIX_FMT_YUV422P &&
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pix_fmt != PIX_FMT_YUV444P)
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return -1;
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if ((width & 1) != 0 || (height & 3) != 0)
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return -1;
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for(i=0;i<3;i++) {
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if (i == 1) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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width >>= 1;
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height >>= 1;
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break;
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case PIX_FMT_YUV422P:
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width >>= 1;
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break;
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default:
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break;
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}
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}
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deinterlace_bottom_field(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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return size_out;
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return 0;
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}
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