39 #define SAMPLES_PER_BAND 36
40 #define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)
46 0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
47 5636, 6164, 6676, 7224
57 static int vlc_initialized = 0;
62 static VLC_TYPE quant_tables[7224][2];
100 if(vlc_initialized)
return 0;
102 scfi_vlc.
table = scfi_table;
110 dscf_vlc.
table = dscf_table;
118 hdr_vlc.
table = hdr_table;
127 for(j = 0; j < 2; j++){
129 quant_vlc[i][j].
table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*2 + j];
160 for(i = 0; i < SAMPLES_PER_BAND/3; i++){
161 t =
get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
169 for(i = 0; i < SAMPLES_PER_BAND/2; i++){
170 t =
get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
175 case 3:
case 4:
case 5:
case 6:
case 7:
180 case 8:
case 9:
case 10:
case 11:
case 12:
181 case 13:
case 14:
case 15:
case 16:
case 17:
182 t = (1 << (idx - 2)) - 1;
196 return av_clip_uintp2(ref + t, 7);
200 int *got_frame_ptr,
AVPacket *avpkt)
202 const uint8_t *buf = avpkt->
data;
203 int buf_size = avpkt->
size;
211 int bits_used, bits_avail;
213 memset(bands, 0,
sizeof(*bands) * (c->
maxbands + 1));
227 c->
dsp.
bswap_buf((uint32_t*)bits, (
const uint32_t*)(buf + 4), (buf_size - 4) >> 2);
233 for(ch = 0; ch < 2; ch++){
237 else bands[i].
res[ch] = av_clip(bands[i-1].res[ch] + t, 0, 17);
240 if(bands[i].res[0] || bands[i].res[1]){
246 for(i = 0; i <= mb; i++)
247 for(ch = 0; ch < 2; ch++)
250 for(i = 0; i <= mb; i++){
251 for(ch = 0; ch < 2; ch++){
252 if(bands[i].res[ch]){
255 switch(bands[i].scfi[ch]){
277 memset(c->
Q, 0,
sizeof(c->
Q));
280 for(ch = 0; ch < 2; ch++)
288 bits_avail = (buf_size - 4) * 8;
289 if(!buf[1] && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))){
290 av_log(
NULL,0,
"Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);