102 #define WMAPRO_MAX_CHANNELS 8
103 #define MAX_SUBFRAMES 32
105 #define MAX_FRAMESIZE 32768
107 #define WMAPRO_BLOCK_MIN_BITS 6
108 #define WMAPRO_BLOCK_MAX_BITS 13
109 #define WMAPRO_BLOCK_MIN_SIZE (1 << WMAPRO_BLOCK_MIN_BITS)
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)
239 #define PRINT(a, b) av_log(s->avctx, AV_LOG_DEBUG, " %s = %d\n", a, b);
240 #define PRINT_HEX(a, b) av_log(s->avctx, AV_LOG_DEBUG, " %s = %x\n", a, b);
276 unsigned int channel_mask;
278 int log2_max_num_subframes;
279 int num_possible_block_sizes;
295 channel_mask =
AV_RL32(edata_ptr+2);
324 log2_max_num_subframes = ((s->
decode_flags & 0x38) >> 3);
330 num_possible_block_sizes = log2_max_num_subframes + 1;
362 for (i = 0; i < avctx->
channels; i++)
368 if (channel_mask & 8) {
370 for (mask = 1; mask < 16; mask <<= 1) {
371 if (channel_mask & mask)
406 for (i = 0; i < num_possible_block_sizes; i++) {
430 for (i = 0; i < num_possible_block_sizes; i++) {
432 for (b = 0; b < s->
num_sfb[i]; b++) {
436 for (x = 0; x < num_possible_block_sizes; x++) {
460 for (i = 0; i < num_possible_block_sizes; i++) {
468 for (i = 0; i < 33; i++)
469 sin64[i] = sin(i*M_PI / 64.0);
487 int frame_len_shift = 0;
504 if (subframe_len < s->min_samples_per_subframe ||
538 int fixed_channel_layout = 0;
539 int min_channel_len = 0;
553 fixed_channel_layout = 1;
561 if (num_samples[c] == min_channel_len) {
562 if (fixed_channel_layout || channels_for_cur_subframe == 1 ||
564 contains_subframe[c] = 1;
568 contains_subframe[c] = 0;
576 min_channel_len += subframe_len;
580 if (contains_subframe[c]) {
583 "broken frame: num subframes > 31\n");
587 num_samples[c] += subframe_len;
591 "channel len > samples_per_frame\n");
594 }
else if (num_samples[c] <= min_channel_len) {
595 if (num_samples[c] < min_channel_len) {
596 channels_for_cur_subframe = 0;
597 min_channel_len = num_samples[c];
599 ++channels_for_cur_subframe;
602 }
while (min_channel_len < s->samples_per_frame);
642 for (x = 0; x < i; x++) {
644 for (y = 0; y < i + 1; y++) {
647 int n = rotation_offset[offset + x];
653 cosv =
sin64[32 - n];
655 sinv =
sin64[64 - n];
656 cosv = -
sin64[n - 32];
660 (v1 * sinv) - (v2 * cosv);
662 (v1 * cosv) + (v2 * sinv);
689 "Channel transform bit");
701 if (remaining_channels > 2) {
726 "Unknown channel transform type");
753 "Coupled channels > 6");
793 static const uint32_t fval_tab[16] = {
794 0x00000000, 0x3f800000, 0x40000000, 0x40400000,
795 0x40800000, 0x40a00000, 0x40c00000, 0x40e00000,
796 0x41000000, 0x41100000, 0x41200000, 0x41300000,
797 0x41400000, 0x41500000, 0x41600000, 0x41700000,
808 av_dlog(s->
avctx,
"decode coefficients for channel %i\n", c);
811 vlc = &coef_vlc[vlctable];
832 for (i = 0; i < 4; i += 2) {
846 vals[i+1] = fval_tab[symbol_to_vec2[idx] & 0xF];
851 vals[1] = fval_tab[(symbol_to_vec4[idx] >> 8) & 0xF];
852 vals[2] = fval_tab[(symbol_to_vec4[idx] >> 4) & 0xF];
853 vals[3] = fval_tab[ symbol_to_vec4[idx] & 0xF];
857 for (i = 0; i < 4; i++) {
863 ci->
coeffs[cur_coeff] = 0;
873 if (cur_coeff < s->subframe_len) {
874 memset(&ci->
coeffs[cur_coeff], 0,
877 level, run, 1, ci->
coeffs,
944 sign = (code & 1) - 1;
945 skip = (code & 0x3f) >> 1;
946 }
else if (idx == 1) {
957 "invalid scale factor coding\n");
993 float** ch_end = ch_data + num_channels;
999 sfb < s->cur_sfb_offsets + s->
num_bands; sfb++) {
1005 const float* data_end = data + num_channels;
1006 float* data_ptr =
data;
1009 for (ch = ch_data; ch < ch_end; ch++)
1010 *data_ptr++ = (*ch)[y];
1012 for (ch = ch_data; ch < ch_end; ch++) {
1015 while (data_ptr < data_end)
1016 sum += *data_ptr++ * *mat++;
1024 ch_data[0] + sfb[0],
1027 ch_data[1] + sfb[0],
1075 int transmit_coeffs = 0;
1076 int cur_subwoofer_cutoff;
1094 "processing subframe with offset %i len %i\n", offset, subframe_len);
1144 if (!(num_fill_bits =
get_bits(&s->
gb, 2))) {
1149 if (num_fill_bits >= 0) {
1173 transmit_coeffs = 1;
1176 if (transmit_coeffs) {
1185 int num_vec_coeffs =
get_bits(&s->
gb, num_bits) << 2;
1201 if (step == -32 || step == 31) {
1202 const int sign = (step == 31) - 1;
1208 quant_step += ((quant +
step) ^ sign) - sign;
1210 if (quant_step < 0) {
1237 av_dlog(s->
avctx,
"BITSTREAM: subframe header length was %i\n",
1251 av_dlog(s->
avctx,
"BITSTREAM: subframe length was %i\n",
1254 if (transmit_coeffs) {
1264 memset(&s->
tmp[cur_subwoofer_cutoff], 0,
sizeof(*s->
tmp) *
1265 (subframe_len - cur_subwoofer_cutoff));
1273 const float quant = pow(10.0, exp / 20.0);
1277 quant, end - start);
1311 int more_frames = 0;
1319 av_dlog(s->
avctx,
"decoding frame with length %x\n", len);
1360 av_dlog(s->
avctx,
"BITSTREAM: frame header length was %i\n",
1365 for (i = 0; i < avctx->
channels; i++) {
1388 for (i = 0; i < avctx->
channels; i++)
1392 for (i = 0; i < avctx->
channels; i++) {
1411 "frame[%i] would have to skip %i bits\n", s->
frame_num,
1474 "Cannot append %d bits, only %d bits available.\n",
1486 align =
FFMIN(align, len);
1510 int *got_frame_ptr,
AVPacket* avpkt)
1515 int buf_size = avpkt->
size;
1516 int num_bits_prev_frame;
1517 int packet_sequence_number;
1525 if (buf_size < avctx->block_align) {
1537 packet_sequence_number =
get_bits(gb, 4);
1543 num_bits_prev_frame);
1554 if (num_bits_prev_frame > 0) {
1556 if (num_bits_prev_frame >= remaining_packet_bits) {
1557 num_bits_prev_frame = remaining_packet_bits;
1563 save_bits(s, gb, num_bits_prev_frame, 1);
1564 av_dlog(avctx,
"accumulated %x bits of frame data\n",
1571 av_dlog(avctx,
"ignoring %x previously saved bits\n",
1631 for (i = 0; i < avctx->
channels; i++)