static void
schro_decoder_decode_slice (SchroPicture *picture,
SchroLowDelay *lowdelay,
int slice_x, int slice_y, int offset, int slice_bytes)
{
SchroParams *params = &picture->params;
SchroUnpack y_unpack;
SchroUnpack uv_unpack;
int quant_index;
int base_index;
int length_bits;
int slice_y_length;
int i;
int j;
int x,y;
int value;
schro_unpack_init_with_data (&y_unpack,
OFFSET(picture->lowdelay_buffer->data, offset), slice_bytes, 1);
base_index = schro_unpack_decode_bits (&y_unpack, 7);
length_bits = ilog2up(8*slice_bytes);
slice_y_length = schro_unpack_decode_bits (&y_unpack, length_bits);
schro_unpack_copy (&uv_unpack, &y_unpack);
schro_unpack_limit_bits_remaining (&y_unpack, slice_y_length);
schro_unpack_skip_bits (&uv_unpack, slice_y_length);
j = 0;
for(i=0;i<1+3*params->transform_depth;i++) {
int quant_factor;
int quant_offset;
int16_t *line;
SchroFrameData block;
schro_frame_data_get_codeblock (&block, lowdelay->luma_subbands + i,
slice_x, slice_y,
lowdelay->n_horiz_slices, lowdelay->n_vert_slices);
quant_index = CLAMP(base_index - params->quant_matrix[i], 0, 60);
quant_factor = schro_table_quant[quant_index];
quant_offset = schro_table_offset_1_2[quant_index];
for(y=0;y<block.height;y++){
line = OFFSET(block.data, block.stride * y);
for (x=0; x<block.width; x++){
value = schro_unpack_decode_sint (&y_unpack);
line[x] = schro_dequantise (value, quant_factor, quant_offset);
}
}
}
j = 0;
for(i=0;i<1+3*params->transform_depth;i++) {
int quant_factor;
int quant_offset;
int16_t *line1;
int16_t *line2;
SchroFrameData block1;
SchroFrameData block2;
schro_frame_data_get_codeblock (&block1, lowdelay->chroma1_subbands + i,
slice_x, slice_y,
lowdelay->n_horiz_slices, lowdelay->n_vert_slices);
schro_frame_data_get_codeblock (&block2, lowdelay->chroma2_subbands + i,
slice_x, slice_y,
lowdelay->n_horiz_slices, lowdelay->n_vert_slices);
quant_index = CLAMP(base_index - params->quant_matrix[i], 0, 60);
quant_factor = schro_table_quant[quant_index];
quant_offset = schro_table_offset_1_2[quant_index];
for(y=0;y<block1.height;y++){
line1 = OFFSET(block1.data, block1.stride * y);
line2 = OFFSET(block2.data, block2.stride * y);
for (x=0; x<block1.width; x++){
value = schro_unpack_decode_sint (&uv_unpack);
line1[x] = schro_dequantise (value, quant_factor, quant_offset);
value = schro_unpack_decode_sint (&uv_unpack);
line2[x] = schro_dequantise (value, quant_factor, quant_offset);
}
}
}
}
int test3 (void)
{
SchroBuffer *buffer = schro_buffer_new_and_alloc (1000);
SchroPack *pack;
SchroUnpack unpack;
SchroUnpack unpack2;
int i;
int ref[100];
int x;
int n_bytes;
int n_bits = 0;
int n_bits2 = 0;
memset (buffer->data, 0, 1000);
for(i=0;i<100;i++){
ref[i] = (rand()&0xff) - 128;
}
pack = schro_pack_new ();
schro_pack_encode_init (pack, buffer);
n_bits = 0;
for(i=0;i<50;i++){
schro_pack_encode_sint (pack, ref[i]);
n_bits += schro_pack_estimate_sint (ref[i]);
}
n_bits2 = 0;
for(i=50;i<100;i++){
schro_pack_encode_sint (pack, ref[i]);
n_bits2 += schro_pack_estimate_sint (ref[i]);
}
schro_pack_flush(pack);
n_bytes = schro_pack_get_offset (pack);
schro_pack_free (pack);
schro_unpack_init_with_data (&unpack, buffer->data, n_bytes, 1);
schro_unpack_copy (&unpack2, &unpack);
schro_unpack_limit_bits_remaining (&unpack, n_bits);
for(i=0;i<50;i++){
x = schro_unpack_decode_sint (&unpack);
if (x != ref[i]) {
SCHRO_ERROR("test3 failed at symbol %d (%d should be %d)", i, x, ref[i]);
schro_unpack_dump(&unpack);
return 0;
}
}
for(i=0;i<10;i++){
x = schro_unpack_decode_sint (&unpack);
if (x != 0) {
SCHRO_ERROR("test3 failed at symbol %d (%d should be 0)", i, x);
schro_unpack_dump(&unpack);
return 0;
}
}
schro_unpack_skip_bits (&unpack2, n_bits);
schro_unpack_limit_bits_remaining (&unpack2, n_bits2);
for(i=50;i<100;i++){
x = schro_unpack_decode_sint (&unpack2);
if (x != ref[i]) {
SCHRO_ERROR("test3 failed at symbol %d (%d should be %d)", i, x, ref[i]);
schro_unpack_dump(&unpack2);
return 0;
}
}
for(i=0;i<10;i++){
x = schro_unpack_decode_sint (&unpack2);
if (x != 0) {
SCHRO_ERROR("test3 failed at symbol %d (%d should be 0)", i, x);
schro_unpack_dump(&unpack2);
return 0;
}
}
schro_buffer_unref (buffer);
return 1;
}
