66 const int linesize = frame->
linesize[0];
69 int left[3], top[3], topleft[3];
72 for (i = 0; i < 3; i++)
73 buffer[0][i] = 1 << (9 - 1);
75 for (y = 0; y <
height; y++) {
76 const int modified_predictor = y ? predictor : 1;
84 for (i = 0; i < 3; i++)
85 top[i]= left[i]= topleft[i]=
buffer[0][i];
87 for (x = 0; x <
width; x++) {
88 buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
89 buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
90 buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
92 for (i = 0; i < 3; i++) {
95 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
102 diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
116 const AVFrame *frame,
int predictor,
121 if (mb_x == 0 || mb_y == 0) {
122 for (i = 0; i < 3; i++) {
124 int x, y, h, v, linesize;
129 for (y = 0; y < v; y++) {
130 for (x = 0; x < h; x++) {
133 ptr = frame->
data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x);
134 if (y == 0 && mb_y == 0) {
135 if (x == 0 && mb_x == 0)
140 if (x == 0 && mb_x == 0) {
141 pred = ptr[-linesize];
143 PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
156 for (i = 0; i < 3; i++) {
158 int x, y, h, v, linesize;
163 for (y = 0; y < v; y++) {
164 for (x = 0; x < h; x++) {
167 ptr = frame->
data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x);
168 PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
189 for (mb_y = 0; mb_y < mb_height; mb_y++) {
196 for (mb_x = 0; mb_x < mb_width; mb_x++)
204 const AVFrame *pict,
int *got_packet)
211 const int mb_height = (height + s->
vsample[0] - 1) / s->
vsample[0];
213 int ret, header_bits;
216 max_pkt_size += width * height * 3 * 3;
218 max_pkt_size += mb_width * mb_height * 3 * 4
222 av_log(avctx,
AV_LOG_ERROR,
"Error getting output packet of size %d.\n", max_pkt_size);
265 int chroma_v_shift, chroma_h_shift;
272 "Limited range YUV is non-standard, set strict_std_compliance to "
273 "at least unofficial to use it.\n");
298 s->
vsample[1] = 2 >> chroma_v_shift;
299 s->
vsample[2] = 2 >> chroma_v_shift;
301 s->
hsample[1] = 2 >> chroma_h_shift;
302 s->
hsample[2] = 2 >> chroma_h_shift;