41 #define SAMPLES_PER_BAND 36
42 #define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)
48 0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
49 5636, 6164, 6676, 7224
59 static int vlc_initialized = 0;
64 static VLC_TYPE quant_tables[7224][2];
101 if(vlc_initialized)
return 0;
103 scfi_vlc.
table = scfi_table;
111 dscf_vlc.
table = dscf_table;
119 hdr_vlc.
table = hdr_table;
128 for(j = 0; j < 2; j++){
130 quant_vlc[i][j].
table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*2 + j];
158 for(i = 0; i < SAMPLES_PER_BAND/3; i++){
159 t =
get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
167 for(i = 0; i < SAMPLES_PER_BAND/2; i++){
168 t =
get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
173 case 3:
case 4:
case 5:
case 6:
case 7:
178 case 8:
case 9:
case 10:
case 11:
case 12:
179 case 13:
case 14:
case 15:
case 16:
case 17:
180 t = (1 << (idx - 2)) - 1;
194 return av_clip_uintp2(ref + t, 7);
198 int *got_frame_ptr,
AVPacket *avpkt)
208 int off, ret, last_frame, skip;
209 int bits_used, bits_avail;
211 memset(bands, 0,
sizeof(*bands) * (c->
maxbands + 1));
213 buf_size = avpkt->
size & ~3;
219 if (buf_size != avpkt->
size) {
221 "extra bytes at the end will be skipped.\n");
239 c->
dsp.
bswap_buf((uint32_t *)c->
bits, (
const uint32_t *)buf, buf_size >> 2);
245 for(ch = 0; ch < 2; ch++){
249 else bands[i].
res[ch] = av_clip(bands[i-1].res[ch] + t, 0, 17);
252 if(bands[i].res[0] || bands[i].res[1]){
258 for(i = 0; i <= mb; i++)
259 for(ch = 0; ch < 2; ch++)
262 for(i = 0; i <= mb; i++){
263 for(ch = 0; ch < 2; ch++){
264 if(bands[i].res[ch]){
267 switch(bands[i].scfi[ch]){
289 memset(c->
Q, 0,
sizeof(c->
Q));
292 for(ch = 0; ch < 2; ch++)
298 bits_avail = buf_size * 8;
299 if (!last_frame && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))) {
300 av_log(avctx,
AV_LOG_ERROR,
"Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);