unsigned char *_aux) {
}
-int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip) {
+int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
+ int only_420) {
char buffer[80];
int ret;
int i;
"Only progressive scan handled.\n");
return -1;
}
+ _y4m->vpx_fmt = VPX_IMG_FMT_I420;
+ _y4m->vpx_bps = 12;
if (strcmp(_y4m->chroma_type, "420") == 0 ||
strcmp(_y4m->chroma_type, "420jpeg") == 0) {
_y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
_y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
_y4m->convert = y4m_convert_422jpeg_420jpeg;
} else if (strcmp(_y4m->chroma_type, "422") == 0) {
- _y4m->src_c_dec_h = _y4m->dst_c_dec_h = 2;
+ _y4m->src_c_dec_h = 2;
_y4m->src_c_dec_v = 1;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
- /*Chroma filter required: read into the aux buf first.
- We need to make two filter passes, so we need some extra space in the
- aux buffer.*/
- _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->convert = y4m_convert_422_420jpeg;
+ if (only_420) {
+ _y4m->dst_c_dec_h = 2;
+ _y4m->dst_c_dec_v = 2;
+ _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ /*Chroma filter required: read into the aux buf first.
+ We need to make two filter passes, so we need some extra space in the
+ aux buffer.*/
+ _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+ _y4m->aux_buf_sz = _y4m->aux_buf_read_sz +
+ ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+ _y4m->convert = y4m_convert_422_420jpeg;
+ } else {
+ _y4m->vpx_fmt = VPX_IMG_FMT_I422;
+ _y4m->vpx_bps = 16;
+ _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
+ _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
+ _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h
+ + 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+ /*Natively supported: no conversion required.*/
+ _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
+ _y4m->convert = y4m_convert_null;
+ }
} else if (strcmp(_y4m->chroma_type, "411") == 0) {
_y4m->src_c_dec_h = 4;
_y4m->dst_c_dec_h = 2;
_y4m->convert = y4m_convert_411_420jpeg;
} else if (strcmp(_y4m->chroma_type, "444") == 0) {
_y4m->src_c_dec_h = 1;
- _y4m->dst_c_dec_h = 2;
_y4m->src_c_dec_v = 1;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
- /*Chroma filter required: read into the aux buf first.
- We need to make two filter passes, so we need some extra space in the
- aux buffer.*/
- _y4m->aux_buf_read_sz = 2 * _y4m->pic_w * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->convert = y4m_convert_444_420jpeg;
+ if (only_420) {
+ _y4m->dst_c_dec_h = 2;
+ _y4m->dst_c_dec_v = 2;
+ _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ /*Chroma filter required: read into the aux buf first.
+ We need to make two filter passes, so we need some extra space in the
+ aux buffer.*/
+ _y4m->aux_buf_read_sz = 2 * _y4m->pic_w * _y4m->pic_h;
+ _y4m->aux_buf_sz = _y4m->aux_buf_read_sz +
+ ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+ _y4m->convert = y4m_convert_444_420jpeg;
+ } else {
+ _y4m->vpx_fmt = VPX_IMG_FMT_I444;
+ _y4m->vpx_bps = 24;
+ _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
+ _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
+ _y4m->dst_buf_read_sz = 3 * _y4m->pic_w * _y4m->pic_h;
+ /*Natively supported: no conversion required.*/
+ _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
+ _y4m->convert = y4m_convert_null;
+ }
} else if (strcmp(_y4m->chroma_type, "444alpha") == 0) {
_y4m->src_c_dec_h = 1;
- _y4m->dst_c_dec_h = 2;
_y4m->src_c_dec_v = 1;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
- /*Chroma filter required: read into the aux buf first.
- We need to make two filter passes, so we need some extra space in the
- aux buffer.
- The extra plane also gets read into the aux buf.
- It will be discarded.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 3 * _y4m->pic_w * _y4m->pic_h;
- _y4m->convert = y4m_convert_444_420jpeg;
+ if (only_420) {
+ _y4m->dst_c_dec_h = 2;
+ _y4m->dst_c_dec_v = 2;
+ _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ /*Chroma filter required: read into the aux buf first.
+ We need to make two filter passes, so we need some extra space in the
+ aux buffer.
+ The extra plane also gets read into the aux buf.
+ It will be discarded.*/
+ _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 3 * _y4m->pic_w * _y4m->pic_h;
+ _y4m->convert = y4m_convert_444_420jpeg;
+ } else {
+ _y4m->vpx_fmt = VPX_IMG_FMT_444A;
+ _y4m->vpx_bps = 32;
+ _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
+ _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
+ _y4m->dst_buf_read_sz = 4 * _y4m->pic_w * _y4m->pic_h;
+ /*Natively supported: no conversion required.*/
+ _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
+ _y4m->convert = y4m_convert_null;
+ }
} else if (strcmp(_y4m->chroma_type, "mono") == 0) {
_y4m->src_c_dec_h = _y4m->src_c_dec_v = 0;
_y4m->dst_c_dec_h = _y4m->dst_c_dec_v = 2;
sizes, which would require a separate fread call for every row.*/
memset(_img, 0, sizeof(*_img));
/*Y4M has the planes in Y'CbCr order, which libvpx calls Y, U, and V.*/
- _img->fmt = IMG_FMT_I420;
+ _img->fmt = _y4m->vpx_fmt;
_img->w = _img->d_w = _y4m->pic_w;
_img->h = _img->d_h = _y4m->pic_h;
- /*This is hard-coded to 4:2:0 for now, as that's all VP8 supports.*/
- _img->x_chroma_shift = 1;
- _img->y_chroma_shift = 1;
- _img->bps = 12;
+ _img->x_chroma_shift = _y4m->dst_c_dec_h >> 1;
+ _img->y_chroma_shift = _y4m->dst_c_dec_v >> 1;
+ _img->bps = _y4m->vpx_bps;
+
/*Set up the buffer pointers.*/
pic_sz = _y4m->pic_w * _y4m->pic_h;
c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
c_sz = c_w * c_h;
- _img->stride[PLANE_Y] = _y4m->pic_w;
+ _img->stride[PLANE_Y] = _img->stride[PLANE_ALPHA] = _y4m->pic_w;
_img->stride[PLANE_U] = _img->stride[PLANE_V] = c_w;
_img->planes[PLANE_Y] = _y4m->dst_buf;
_img->planes[PLANE_U] = _y4m->dst_buf + pic_sz;
_img->planes[PLANE_V] = _y4m->dst_buf + pic_sz + c_sz;
+ _img->planes[PLANE_ALPHA] = _y4m->dst_buf + pic_sz + 2 * c_sz;
return 1;
}