private float[][] k;
@LOC("NZ")
private int[] nonzero;
- @LOC("ST")
- private Bitstream stream;
@LOC("HD")
private Header header;
@LOC("FT")
// REVIEW: these constructor arguments should be moved to the
// decodeFrame() method, where possible, so that one
@LATTICE("THIS<VAR,THIS<I,THIS<J,J<CH,I*,J*,CH*,THISLOC=THIS,GLOBALLOC=THIS")
- public LayerIIIDecoder(@LOC("VAR") Bitstream stream0, @LOC("VAR") Header header0,
- @LOC("VAR") SynthesisFilter filtera, @LOC("VAR") SynthesisFilter filterb,
- @LOC("VAR") Obuffer buffer0, @LOC("VAR") int which_ch0) {
+ public LayerIIIDecoder(@LOC("VAR") Header header0, @LOC("VAR") SynthesisFilter filtera,
+ @LOC("VAR") SynthesisFilter filterb, @LOC("VAR") Obuffer buffer0, @LOC("VAR") int which_ch0) {
huffcodetab.inithuff();
is_1d = new int[SBLIMIT * SSLIMIT + 4];
scalefac_buffer = new int[54];
// END OF scalefac_buffer
- stream = stream0;
header = header0;
filter1 = filtera;
filter2 = filterb;
@LOC("THIS,LayerIIIDecoder.BR,BitReserve.BIT") int bytes_to_discard;
@LOC("C") int i;
- get_side_info();
-
- for (i = 0; i < nSlots; i++) {
- br.hputbuf(stream.get_bits(8));
- // LOC(stream.get_bits)=DELTA[Loc[decode.THIS],Loc[LayerIIIDecoder.ST]]
- // param should be higher than br
- }
-
- main_data_end = br.hsstell() >>> 3;
-
- if ((flush_main = (br.hsstell() & 7)) != 0) { // flush_main < br
- br.hgetbits(8 - flush_main); // br < flush_main
- main_data_end++; // main_data_end*
- }
-
- // bytes_to_discard < GLB(frame_start,main_data_end,si)
- bytes_to_discard = frame_start - main_data_end - si.main_data_begin;
-
- // frame_start should be *
- frame_start += nSlots;
-
- if (bytes_to_discard < 0) {
- return;
- }
-
- if (main_data_end > 4096) { // main_data_end should be > than 'frame_start'
- // and 'br'
- frame_start -= 4096;
- br.rewindNbytes(4096);
- }
-
- for (; bytes_to_discard > 0; bytes_to_discard--) {
- // bytes_to_discard > br
- br.hgetbits(8);
- }
-
- // doing something from here
+ // modifications for linear type
+ get_side_info(header.getSideInfoBuffer());
+ br = header.getBitReserve();
// here 'gr' and 'max_gr' should be higher than 'ch','channels', and more
for (gr = 0; gr < max_gr; gr++) { // two granules per channel
* Reads the side info from the stream, assuming the entire. frame has been
* read already. Mono : 136 bits (= 17 bytes) Stereo : 256 bits (= 32 bytes)
*/
- @LATTICE("OUT<THIS,THISLOC=THIS,RETURNLOC=OUT")
- private boolean get_side_info() {
-
- @LOC("THIS,LayerIIIDecoder.CH0") int ch;
- @LOC("THIS,LayerIIIDecoder.CH0") int gr;
-
+ private boolean get_side_info(SideInfoBuffer sib) {
+ int ch, gr;
+ // System.out.println("#get_side_info");
if (header.version() == Header.MPEG1) {
- si.main_data_begin = stream.get_bits(9);
- if (channels == 1) {
- si.private_bits = stream.get_bits(5);
- } else {
- si.private_bits = stream.get_bits(3);
- }
+ si.main_data_begin = sib.get_bits(9);
+ if (channels == 1)
+ si.private_bits = sib.get_bits(5);
+ else
+ si.private_bits = sib.get_bits(3);
for (ch = 0; ch < channels; ch++) {
- si.ch[ch].scfsi[0] = stream.get_bits(1);
- si.ch[ch].scfsi[1] = stream.get_bits(1);
- si.ch[ch].scfsi[2] = stream.get_bits(1);
- si.ch[ch].scfsi[3] = stream.get_bits(1);
+ si.ch[ch].scfsi[0] = sib.get_bits(1);
+ si.ch[ch].scfsi[1] = sib.get_bits(1);
+ si.ch[ch].scfsi[2] = sib.get_bits(1);
+ si.ch[ch].scfsi[3] = sib.get_bits(1);
}
+ // System.out.println("BEFORE GR,CH");
+
for (gr = 0; gr < 2; gr++) {
+ // System.out.println("GR=" + gr);
for (ch = 0; ch < channels; ch++) {
- si.ch[ch].gr[gr].part2_3_length = stream.get_bits(12);
- si.ch[ch].gr[gr].big_values = stream.get_bits(9);
- si.ch[ch].gr[gr].global_gain = stream.get_bits(8);
- si.ch[ch].gr[gr].scalefac_compress = stream.get_bits(4);
- si.ch[ch].gr[gr].window_switching_flag = stream.get_bits(1);
+ // System.out.println("CH");
+ si.ch[ch].gr[gr].part2_3_length = sib.get_bits(12);
+ si.ch[ch].gr[gr].big_values = sib.get_bits(9);
+ si.ch[ch].gr[gr].global_gain = sib.get_bits(8);
+ si.ch[ch].gr[gr].scalefac_compress = sib.get_bits(4);
+ si.ch[ch].gr[gr].window_switching_flag = sib.get_bits(1);
if ((si.ch[ch].gr[gr].window_switching_flag) != 0) {
- si.ch[ch].gr[gr].block_type = stream.get_bits(2);
- si.ch[ch].gr[gr].mixed_block_flag = stream.get_bits(1);
+ si.ch[ch].gr[gr].block_type = sib.get_bits(2);
+ si.ch[ch].gr[gr].mixed_block_flag = sib.get_bits(1);
- si.ch[ch].gr[gr].table_select[0] = stream.get_bits(5);
- si.ch[ch].gr[gr].table_select[1] = stream.get_bits(5);
+ si.ch[ch].gr[gr].table_select[0] = sib.get_bits(5);
+ si.ch[ch].gr[gr].table_select[1] = sib.get_bits(5);
- si.ch[ch].gr[gr].subblock_gain[0] = stream.get_bits(3);
- si.ch[ch].gr[gr].subblock_gain[1] = stream.get_bits(3);
- si.ch[ch].gr[gr].subblock_gain[2] = stream.get_bits(3);
+ si.ch[ch].gr[gr].subblock_gain[0] = sib.get_bits(3);
+ si.ch[ch].gr[gr].subblock_gain[1] = sib.get_bits(3);
+ si.ch[ch].gr[gr].subblock_gain[2] = sib.get_bits(3);
- // Set region_count parameters since they are implicit in this case.
+ // Set region_count parameters since they are implicit
+ // in this case.
if (si.ch[ch].gr[gr].block_type == 0) {
// Side info bad: block_type == 0 in split block
}
si.ch[ch].gr[gr].region1_count = 20 - si.ch[ch].gr[gr].region0_count;
} else {
- si.ch[ch].gr[gr].table_select[0] = stream.get_bits(5);
- si.ch[ch].gr[gr].table_select[1] = stream.get_bits(5);
- si.ch[ch].gr[gr].table_select[2] = stream.get_bits(5);
- si.ch[ch].gr[gr].region0_count = stream.get_bits(4);
- si.ch[ch].gr[gr].region1_count = stream.get_bits(3);
+ si.ch[ch].gr[gr].table_select[0] = sib.get_bits(5);
+ si.ch[ch].gr[gr].table_select[1] = sib.get_bits(5);
+ si.ch[ch].gr[gr].table_select[2] = sib.get_bits(5);
+ si.ch[ch].gr[gr].region0_count = sib.get_bits(4);
+ si.ch[ch].gr[gr].region1_count = sib.get_bits(3);
si.ch[ch].gr[gr].block_type = 0;
}
- si.ch[ch].gr[gr].preflag = stream.get_bits(1);
- si.ch[ch].gr[gr].scalefac_scale = stream.get_bits(1);
- si.ch[ch].gr[gr].count1table_select = stream.get_bits(1);
+ si.ch[ch].gr[gr].preflag = sib.get_bits(1);
+ si.ch[ch].gr[gr].scalefac_scale = sib.get_bits(1);
+ si.ch[ch].gr[gr].count1table_select = sib.get_bits(1);
}
}
} else { // MPEG-2 LSF, SZD: MPEG-2.5 LSF
- si.main_data_begin = stream.get_bits(8);
+ si.main_data_begin = sib.get_bits(8);
if (channels == 1)
- si.private_bits = stream.get_bits(1);
+ si.private_bits = sib.get_bits(1);
else
- si.private_bits = stream.get_bits(2);
+ si.private_bits = sib.get_bits(2);
for (ch = 0; ch < channels; ch++) {
- si.ch[ch].gr[0].part2_3_length = stream.get_bits(12);
- si.ch[ch].gr[0].big_values = stream.get_bits(9);
- si.ch[ch].gr[0].global_gain = stream.get_bits(8);
- si.ch[ch].gr[0].scalefac_compress = stream.get_bits(9);
- si.ch[ch].gr[0].window_switching_flag = stream.get_bits(1);
+ si.ch[ch].gr[0].part2_3_length = sib.get_bits(12);
+ si.ch[ch].gr[0].big_values = sib.get_bits(9);
+ si.ch[ch].gr[0].global_gain = sib.get_bits(8);
+ si.ch[ch].gr[0].scalefac_compress = sib.get_bits(9);
+ si.ch[ch].gr[0].window_switching_flag = sib.get_bits(1);
if ((si.ch[ch].gr[0].window_switching_flag) != 0) {
- si.ch[ch].gr[0].block_type = stream.get_bits(2);
- si.ch[ch].gr[0].mixed_block_flag = stream.get_bits(1);
- si.ch[ch].gr[0].table_select[0] = stream.get_bits(5);
- si.ch[ch].gr[0].table_select[1] = stream.get_bits(5);
+ si.ch[ch].gr[0].block_type = sib.get_bits(2);
+ si.ch[ch].gr[0].mixed_block_flag = sib.get_bits(1);
+ si.ch[ch].gr[0].table_select[0] = sib.get_bits(5);
+ si.ch[ch].gr[0].table_select[1] = sib.get_bits(5);
- si.ch[ch].gr[0].subblock_gain[0] = stream.get_bits(3);
- si.ch[ch].gr[0].subblock_gain[1] = stream.get_bits(3);
- si.ch[ch].gr[0].subblock_gain[2] = stream.get_bits(3);
+ si.ch[ch].gr[0].subblock_gain[0] = sib.get_bits(3);
+ si.ch[ch].gr[0].subblock_gain[1] = sib.get_bits(3);
+ si.ch[ch].gr[0].subblock_gain[2] = sib.get_bits(3);
- // Set region_count parameters since they are implicit in this case.
+ // Set region_count parameters since they are implicit in
+ // this case.
if (si.ch[ch].gr[0].block_type == 0) {
// Side info bad: block_type == 0 in split block
}
} else {
- si.ch[ch].gr[0].table_select[0] = stream.get_bits(5);
- si.ch[ch].gr[0].table_select[1] = stream.get_bits(5);
- si.ch[ch].gr[0].table_select[2] = stream.get_bits(5);
- si.ch[ch].gr[0].region0_count = stream.get_bits(4);
- si.ch[ch].gr[0].region1_count = stream.get_bits(3);
+ si.ch[ch].gr[0].table_select[0] = sib.get_bits(5);
+ si.ch[ch].gr[0].table_select[1] = sib.get_bits(5);
+ si.ch[ch].gr[0].table_select[2] = sib.get_bits(5);
+ si.ch[ch].gr[0].region0_count = sib.get_bits(4);
+ si.ch[ch].gr[0].region1_count = sib.get_bits(3);
si.ch[ch].gr[0].block_type = 0;
}
- si.ch[ch].gr[0].scalefac_scale = stream.get_bits(1);
- si.ch[ch].gr[0].count1table_select = stream.get_bits(1);
+ si.ch[ch].gr[0].scalefac_scale = sib.get_bits(1);
+ si.ch[ch].gr[0].count1table_select = sib.get_bits(1);
} // for(ch=0; ch<channels; ch++)
} // if (header.version() == MPEG1)
return true;
projects / IRC.git / blobdiff