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Make lcldec produce YUV output when the input file is coded like that, instead 

of having it do its own inefficient fixed-point YUV to RGB conversion.

Originally committed as revision 19033 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-05-31 09:09:32 +00:00
parent 55619690e8
commit 8c18e490c4
1 changed files with 59 additions and 103 deletions
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162
libavcodec/lcldec.c
View File

@ -71,42 +71,6 @@ typedef struct LclDecContext {
} LclDecContext;
/*
*
* Helper functions
*
*/
static inline unsigned char fix (int pix14)
{
int tmp;
tmp = (pix14 + 0x80000) >> 20;
return av_clip_uint8(tmp);
}
static inline unsigned char get_b (unsigned char yq, signed char bq)
{
return fix((yq << 20) + bq * 1858076);
}
static inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
{
return fix((yq << 20) - bq * 360857 - rq * 748830);
}
static inline unsigned char get_r (unsigned char yq, signed char rq)
{
return fix((yq << 20) + rq * 1470103);
}
static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
{
unsigned char *destptr_bak = destptr;
@ -166,6 +130,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
unsigned int pixel_ptr;
int row, col;
unsigned char *outptr;
uint8_t *y_out, *u_out, *v_out;
unsigned int width = avctx->width; // Real image width
unsigned int height = avctx->height; // Real image height
unsigned int mszh_dlen;
@ -397,36 +362,35 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
}
/* Convert colorspace */
y_out = c->pic.data[0] + (height - 1) * c->pic.linesize[0];
u_out = c->pic.data[1] + (height - 1) * c->pic.linesize[1];
v_out = c->pic.data[2] + (height - 1) * c->pic.linesize[2];
switch (c->imgtype) {
case IMGTYPE_YUV111:
for (row = height - 1; row >= 0; row--) {
pixel_ptr = row * c->pic.linesize[0];
for (row = 0; row < height; row++) {
for (col = 0; col < width; col++) {
outptr[pixel_ptr++] = get_b(encoded[0], encoded[1]);
outptr[pixel_ptr++] = get_g(encoded[0], encoded[1], encoded[2]);
outptr[pixel_ptr++] = get_r(encoded[0], encoded[2]);
encoded += 3;
y_out[col] = *encoded++;
u_out[col] = *encoded++ + 128;
v_out[col] = *encoded++ + 128;
}
y_out -= c->pic.linesize[0];
u_out -= c->pic.linesize[1];
v_out -= c->pic.linesize[2];
}
break;
case IMGTYPE_YUV422:
for (row = height - 1; row >= 0; row--) {
pixel_ptr = row * c->pic.linesize[0];
for (col = 0; col < width/4; col++) {
outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[6]);
outptr[pixel_ptr++] = get_r(encoded[0], encoded[6]);
outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[6]);
outptr[pixel_ptr++] = get_r(encoded[1], encoded[6]);
outptr[pixel_ptr++] = get_b(encoded[2], encoded[5]);
outptr[pixel_ptr++] = get_g(encoded[2], encoded[5], encoded[7]);
outptr[pixel_ptr++] = get_r(encoded[2], encoded[7]);
outptr[pixel_ptr++] = get_b(encoded[3], encoded[5]);
outptr[pixel_ptr++] = get_g(encoded[3], encoded[5], encoded[7]);
outptr[pixel_ptr++] = get_r(encoded[3], encoded[7]);
encoded += 8;
for (row = 0; row < height; row++) {
for (col = 0; col < width - 3; col += 4) {
memcpy(y_out + col, encoded, 4);
encoded += 4;
u_out[ col >> 1 ] = *encoded++ + 128;
u_out[(col >> 1) + 1] = *encoded++ + 128;
v_out[ col >> 1 ] = *encoded++ + 128;
v_out[(col >> 1) + 1] = *encoded++ + 128;
}
y_out -= c->pic.linesize[0];
u_out -= c->pic.linesize[1];
v_out -= c->pic.linesize[2];
}
break;
case IMGTYPE_RGB24:
@ -437,58 +401,46 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
}
break;
case IMGTYPE_YUV411:
for (row = height - 1; row >= 0; row--) {
pixel_ptr = row * c->pic.linesize[0];
for (col = 0; col < width/4; col++) {
outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[5]);
outptr[pixel_ptr++] = get_r(encoded[0], encoded[5]);
outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[5]);
outptr[pixel_ptr++] = get_r(encoded[1], encoded[5]);
outptr[pixel_ptr++] = get_b(encoded[2], encoded[4]);
outptr[pixel_ptr++] = get_g(encoded[2], encoded[4], encoded[5]);
outptr[pixel_ptr++] = get_r(encoded[2], encoded[5]);
outptr[pixel_ptr++] = get_b(encoded[3], encoded[4]);
outptr[pixel_ptr++] = get_g(encoded[3], encoded[4], encoded[5]);
outptr[pixel_ptr++] = get_r(encoded[3], encoded[5]);
encoded += 6;
for (row = 0; row < height; row++) {
for (col = 0; col < width - 3; col += 4) {
memcpy(y_out + col, encoded, 4);
encoded += 4;
u_out[col >> 2] = *encoded++ + 128;
v_out[col >> 2] = *encoded++ + 128;
}
y_out -= c->pic.linesize[0];
u_out -= c->pic.linesize[1];
v_out -= c->pic.linesize[2];
}
break;
case IMGTYPE_YUV211:
for (row = height - 1; row >= 0; row--) {
pixel_ptr = row * c->pic.linesize[0];
for (col = 0; col < width/2; col++) {
outptr[pixel_ptr++] = get_b(encoded[0], encoded[2]);
outptr[pixel_ptr++] = get_g(encoded[0], encoded[2], encoded[3]);
outptr[pixel_ptr++] = get_r(encoded[0], encoded[3]);
outptr[pixel_ptr++] = get_b(encoded[1], encoded[2]);
outptr[pixel_ptr++] = get_g(encoded[1], encoded[2], encoded[3]);
outptr[pixel_ptr++] = get_r(encoded[1], encoded[3]);
encoded += 4;
for (row = 0; row < height; row++) {
for (col = 0; col < width - 1; col += 2) {
memcpy(y_out + col, encoded, 2);
encoded += 2;
u_out[col >> 1] = *encoded++ + 128;
v_out[col >> 1] = *encoded++ + 128;
}
y_out -= c->pic.linesize[0];
u_out -= c->pic.linesize[1];
v_out -= c->pic.linesize[2];
}
break;
case IMGTYPE_YUV420:
for (row = height / 2 - 1; row >= 0; row--) {
pixel_ptr = 2 * row * c->pic.linesize[0];
for (col = 0; col < width/2; col++) {
outptr[pixel_ptr] = get_b(encoded[0], encoded[4]);
outptr[pixel_ptr+1] = get_g(encoded[0], encoded[4], encoded[5]);
outptr[pixel_ptr+2] = get_r(encoded[0], encoded[5]);
outptr[pixel_ptr+3] = get_b(encoded[1], encoded[4]);
outptr[pixel_ptr+4] = get_g(encoded[1], encoded[4], encoded[5]);
outptr[pixel_ptr+5] = get_r(encoded[1], encoded[5]);
outptr[pixel_ptr-c->pic.linesize[0]] = get_b(encoded[2], encoded[4]);
outptr[pixel_ptr-c->pic.linesize[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
outptr[pixel_ptr-c->pic.linesize[0]+2] = get_r(encoded[2], encoded[5]);
outptr[pixel_ptr-c->pic.linesize[0]+3] = get_b(encoded[3], encoded[4]);
outptr[pixel_ptr-c->pic.linesize[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
outptr[pixel_ptr-c->pic.linesize[0]+5] = get_r(encoded[3], encoded[5]);
pixel_ptr += 6;
encoded += 6;
u_out = c->pic.data[1] + ((height >> 1) - 1) * c->pic.linesize[1];
v_out = c->pic.data[2] + ((height >> 1) - 1) * c->pic.linesize[2];
for (row = 0; row < height - 1; row += 2) {
for (col = 0; col < width - 1; col += 2) {
memcpy(y_out + col, encoded, 2);
encoded += 2;
memcpy(y_out + col - c->pic.linesize[0], encoded, 2);
encoded += 2;
u_out[col >> 1] = *encoded++ + 128;
v_out[col >> 1] = *encoded++ + 128;
}
y_out -= c->pic.linesize[0] << 1;
u_out -= c->pic.linesize[1];
v_out -= c->pic.linesize[2];
}
break;
default:
@ -543,31 +495,37 @@ static av_cold int decode_init(AVCodecContext *avctx)
case IMGTYPE_YUV111:
c->decomp_size = basesize * 3;
max_decomp_size = max_basesize * 3;
avctx->pix_fmt = PIX_FMT_YUV444P;
av_log(avctx, AV_LOG_INFO, "Image type is YUV 1:1:1.\n");
break;
case IMGTYPE_YUV422:
c->decomp_size = basesize * 2;
max_decomp_size = max_basesize * 2;
avctx->pix_fmt = PIX_FMT_YUV422P;
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:2.\n");
break;
case IMGTYPE_RGB24:
c->decomp_size = basesize * 3;
max_decomp_size = max_basesize * 3;
avctx->pix_fmt = PIX_FMT_BGR24;
av_log(avctx, AV_LOG_INFO, "Image type is RGB 24.\n");
break;
case IMGTYPE_YUV411:
c->decomp_size = basesize / 2 * 3;
max_decomp_size = max_basesize / 2 * 3;
avctx->pix_fmt = PIX_FMT_YUV411P;
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:1:1.\n");
break;
case IMGTYPE_YUV211:
c->decomp_size = basesize * 2;
max_decomp_size = max_basesize * 2;
avctx->pix_fmt = PIX_FMT_YUV422P;
av_log(avctx, AV_LOG_INFO, "Image type is YUV 2:1:1.\n");
break;
case IMGTYPE_YUV420:
c->decomp_size = basesize / 2 * 3;
max_decomp_size = max_basesize / 2 * 3;
avctx->pix_fmt = PIX_FMT_YUV420P;
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:0.\n");
break;
default:
@ -657,8 +615,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
#endif
}
avctx->pix_fmt = PIX_FMT_BGR24;
return 0;
}