103 #define WMAPRO_MAX_CHANNELS 8
104 #define MAX_SUBFRAMES 32
106 #define MAX_FRAMESIZE 32768
108 #define WMAPRO_BLOCK_MIN_BITS 6
109 #define WMAPRO_BLOCK_MAX_BITS 13
110 #define WMAPRO_BLOCK_MAX_SIZE (1 << WMAPRO_BLOCK_MAX_BITS)
111 #define WMAPRO_BLOCK_SIZES (WMAPRO_BLOCK_MAX_BITS - WMAPRO_BLOCK_MIN_BITS + 1)
115 #define SCALEVLCBITS 8
116 #define VEC4MAXDEPTH ((HUFF_VEC4_MAXBITS+VLCBITS-1)/VLCBITS)
117 #define VEC2MAXDEPTH ((HUFF_VEC2_MAXBITS+VLCBITS-1)/VLCBITS)
118 #define VEC1MAXDEPTH ((HUFF_VEC1_MAXBITS+VLCBITS-1)/VLCBITS)
119 #define SCALEMAXDEPTH ((HUFF_SCALE_MAXBITS+SCALEVLCBITS-1)/SCALEVLCBITS)
120 #define SCALERLMAXDEPTH ((HUFF_SCALE_RL_MAXBITS+VLCBITS-1)/VLCBITS)
241 #define PRINT(a, b) av_log(s->avctx, AV_LOG_DEBUG, " %s = %d\n", a, b);
242 #define PRINT_HEX(a, b) av_log(s->avctx, AV_LOG_DEBUG, " %s = %x\n", a, b);
278 unsigned int channel_mask;
280 int log2_max_num_subframes;
281 int num_possible_block_sizes;
298 channel_mask =
AV_RL32(edata_ptr+2);
327 log2_max_num_subframes = ((s->
decode_flags & 0x38) >> 3);
333 num_possible_block_sizes = log2_max_num_subframes + 1;
364 for (i = 0; i < avctx->
channels; i++)
370 if (channel_mask & 8) {
372 for (mask = 1; mask < 16; mask <<= 1) {
373 if (channel_mask & mask)
408 for (i = 0; i < num_possible_block_sizes; i++) {
436 for (i = 0; i < num_possible_block_sizes; i++) {
438 for (b = 0; b < s->
num_sfb[i]; b++) {
442 for (x = 0; x < num_possible_block_sizes; x++) {
465 for (i = 0; i < num_possible_block_sizes; i++) {
473 for (i = 0; i < 33; i++)
495 int frame_len_shift = 0;
512 if (subframe_len < s->min_samples_per_subframe ||
546 int fixed_channel_layout = 0;
547 int min_channel_len = 0;
561 fixed_channel_layout = 1;
569 if (num_samples[c] == min_channel_len) {
570 if (fixed_channel_layout || channels_for_cur_subframe == 1 ||
572 contains_subframe[
c] = 1;
576 contains_subframe[
c] = 0;
584 min_channel_len += subframe_len;
588 if (contains_subframe[c]) {
591 "broken frame: num subframes > 31\n");
595 num_samples[
c] += subframe_len;
599 "channel len > samples_per_frame\n");
602 }
else if (num_samples[c] <= min_channel_len) {
603 if (num_samples[c] < min_channel_len) {
604 channels_for_cur_subframe = 0;
605 min_channel_len = num_samples[
c];
607 ++channels_for_cur_subframe;
610 }
while (min_channel_len < s->samples_per_frame);
650 for (x = 0; x < i; x++) {
652 for (y = 0; y < i + 1; y++) {
655 int n = rotation_offset[offset + x];
661 cosv =
sin64[32 - n];
663 sinv =
sin64[64 - n];
664 cosv = -
sin64[n - 32];
668 (v1 * sinv) - (v2 * cosv);
670 (v1 * cosv) + (v2 * sinv);
697 "unsupported channel transform bit\n");
709 if (remaining_channels > 2) {
734 "unsupported channel transform type\n");
760 "coupled channels > 6\n");
800 static const uint32_t fval_tab[16] = {
801 0x00000000, 0x3f800000, 0x40000000, 0x40400000,
802 0x40800000, 0x40a00000, 0x40c00000, 0x40e00000,
803 0x41000000, 0x41100000, 0x41200000, 0x41300000,
804 0x41400000, 0x41500000, 0x41600000, 0x41700000,
815 av_dlog(s->
avctx,
"decode coefficients for channel %i\n", c);
818 vlc = &coef_vlc[vlctable];
839 for (i = 0; i < 4; i += 2) {
853 vals[i+1] = fval_tab[symbol_to_vec2[idx] & 0xF];
858 vals[1] = fval_tab[(symbol_to_vec4[idx] >> 8) & 0xF];
859 vals[2] = fval_tab[(symbol_to_vec4[idx] >> 4) & 0xF];
860 vals[3] = fval_tab[ symbol_to_vec4[idx] & 0xF];
864 for (i = 0; i < 4; i++) {
870 ci->
coeffs[cur_coeff] = 0;
880 if (cur_coeff < s->subframe_len) {
881 memset(&ci->
coeffs[cur_coeff], 0,
884 level, run, 1, ci->
coeffs,
951 sign = (code & 1) - 1;
952 skip = (code & 0x3f) >> 1;
953 }
else if (idx == 1) {
964 "invalid scale factor coding\n");
1000 float** ch_end = ch_data + num_channels;
1006 sfb < s->cur_sfb_offsets + s->
num_bands; sfb++) {
1012 const float* data_end = data + num_channels;
1013 float* data_ptr =
data;
1016 for (ch = ch_data; ch < ch_end; ch++)
1017 *data_ptr++ = (*ch)[y];
1019 for (ch = ch_data; ch < ch_end; ch++) {
1022 while (data_ptr < data_end)
1023 sum += *data_ptr++ * *mat++;
1031 ch_data[0] + sfb[0],
1034 ch_data[1] + sfb[0],
1082 int transmit_coeffs = 0;
1083 int cur_subwoofer_cutoff;
1101 "processing subframe with offset %i len %i\n", offset, subframe_len);
1150 if (!(num_fill_bits =
get_bits(&s->
gb, 2))) {
1152 num_fill_bits = (len ?
get_bits(&s->
gb, len) : 0) + 1;
1155 if (num_fill_bits >= 0) {
1179 transmit_coeffs = 1;
1183 if (transmit_coeffs) {
1192 int num_vec_coeffs =
get_bits(&s->
gb, num_bits) << 2;
1208 if (step == -32 || step == 31) {
1209 const int sign = (step == 31) - 1;
1215 quant_step += ((quant + step) ^ sign) - sign;
1217 if (quant_step < 0) {
1244 av_dlog(s->
avctx,
"BITSTREAM: subframe header length was %i\n",
1258 av_dlog(s->
avctx,
"BITSTREAM: subframe length was %i\n",
1261 if (transmit_coeffs) {
1271 memset(&s->
tmp[cur_subwoofer_cutoff], 0,
sizeof(*s->
tmp) *
1272 (subframe_len - cur_subwoofer_cutoff));
1280 const float quant = pow(10.0, exp / 20.0);
1284 quant, end - start);
1318 int more_frames = 0;
1326 av_dlog(s->
avctx,
"decoding frame with length %x\n", len);
1367 av_dlog(s->
avctx,
"BITSTREAM: frame header length was %i\n",
1372 for (i = 0; i < avctx->
channels; i++) {
1395 for (i = 0; i < avctx->
channels; i++)
1399 for (i = 0; i < avctx->
channels; i++) {
1417 "frame[%i] would have to skip %i bits\n", s->
frame_num,
1484 align =
FFMIN(align, len);
1508 int *got_frame_ptr,
AVPacket* avpkt)
1513 int buf_size = avpkt->
size;
1514 int num_bits_prev_frame;
1515 int packet_sequence_number;
1523 if (buf_size < avctx->block_align) {
1535 packet_sequence_number =
get_bits(gb, 4);
1541 num_bits_prev_frame);
1552 if (num_bits_prev_frame > 0) {
1554 if (num_bits_prev_frame >= remaining_packet_bits) {
1555 num_bits_prev_frame = remaining_packet_bits;
1561 save_bits(s, gb, num_bits_prev_frame, 1);
1562 av_dlog(avctx,
"accumulated %x bits of frame data\n",
1569 av_dlog(avctx,
"ignoring %x previously saved bits\n",
1632 for (i = 0; i < avctx->
channels; i++)