}
} else {
/* process audio command */
- int residual_size = 0;
- int channel = s->cur_chan;
- int32_t coffset;
- if (cmd != FN_ZERO) {
- residual_size = get_ur_golomb_shorten(&s->gb, ENERGYSIZE);
- /* this is a hack as version 0 differed in defintion of get_sr_golomb_shorten */
- if (s->version == 0)
- residual_size--;
- }
+ int residual_size = 0;
+ int channel = s->cur_chan;
+ int32_t coffset;
+ if (cmd != FN_ZERO) {
+ residual_size = get_ur_golomb_shorten(&s->gb, ENERGYSIZE);
+ /* this is a hack as version 0 differed in defintion of get_sr_golomb_shorten */
+ if (s->version == 0)
+ residual_size--;
+ }
- if (s->nmean == 0)
- coffset = s->offset[channel][0];
- else {
- int32_t sum = (s->version < 2) ? 0 : s->nmean / 2;
- for (i=0; i<s->nmean; i++)
- sum += s->offset[channel][i];
- coffset = sum / s->nmean;
- if (s->version >= 2)
- coffset >>= FFMIN(1, s->bitshift);
- }
- switch (cmd) {
- case FN_ZERO:
- for (i=0; i<s->blocksize; i++)
- s->decoded[channel][i] = 0;
- break;
- case FN_DIFF0:
- for (i=0; i<s->blocksize; i++)
- s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + coffset;
- break;
- case FN_DIFF1:
- for (i=0; i<s->blocksize; i++)
- s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + s->decoded[channel][i - 1];
- break;
- case FN_DIFF2:
- for (i=0; i<s->blocksize; i++)
- s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + 2*s->decoded[channel][i-1]
- - s->decoded[channel][i-2];
- break;
- case FN_DIFF3:
- for (i=0; i<s->blocksize; i++)
- s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + 3*s->decoded[channel][i-1]
- - 3*s->decoded[channel][i-2]
- + s->decoded[channel][i-3];
- break;
- case FN_QLPC:
- {
- int pred_order = get_ur_golomb_shorten(&s->gb, LPCQSIZE);
- if (pred_order > s->nwrap) {
- av_log(avctx, AV_LOG_ERROR,
- "invalid pred_order %d\n",
- pred_order);
- return -1;
- }
- for (i=0; i<pred_order; i++)
- s->decoded[channel][i - pred_order] -= coffset;
- decode_subframe_lpc(s, channel, residual_size, pred_order);
- if (coffset != 0)
- for (i=0; i < s->blocksize; i++)
- s->decoded[channel][i] += coffset;
- }
- }
- if (s->nmean > 0) {
- int32_t sum = (s->version < 2) ? 0 : s->blocksize / 2;
- for (i=0; i<s->blocksize; i++)
- sum += s->decoded[channel][i];
-
- for (i=1; i<s->nmean; i++)
- s->offset[channel][i-1] = s->offset[channel][i];
-
- if (s->version < 2)
- s->offset[channel][s->nmean - 1] = sum / s->blocksize;
- else
- s->offset[channel][s->nmean - 1] = (sum / s->blocksize) << s->bitshift;
+ if (s->nmean == 0)
+ coffset = s->offset[channel][0];
+ else {
+ int32_t sum = (s->version < 2) ? 0 : s->nmean / 2;
+ for (i=0; i<s->nmean; i++)
+ sum += s->offset[channel][i];
+ coffset = sum / s->nmean;
+ if (s->version >= 2)
+ coffset >>= FFMIN(1, s->bitshift);
+ }
+ switch (cmd) {
+ case FN_ZERO:
+ for (i=0; i<s->blocksize; i++)
+ s->decoded[channel][i] = 0;
+ break;
+ case FN_DIFF0:
+ for (i=0; i<s->blocksize; i++)
+ s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + coffset;
+ break;
+ case FN_DIFF1:
+ for (i=0; i<s->blocksize; i++)
+ s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + s->decoded[channel][i - 1];
+ break;
+ case FN_DIFF2:
+ for (i=0; i<s->blocksize; i++)
+ s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + 2*s->decoded[channel][i-1]
+ - s->decoded[channel][i-2];
+ break;
+ case FN_DIFF3:
+ for (i=0; i<s->blocksize; i++)
+ s->decoded[channel][i] = get_sr_golomb_shorten(&s->gb, residual_size) + 3*s->decoded[channel][i-1]
+ - 3*s->decoded[channel][i-2]
+ + s->decoded[channel][i-3];
+ break;
+ case FN_QLPC:
+ {
+ int pred_order = get_ur_golomb_shorten(&s->gb, LPCQSIZE);
+ if (pred_order > s->nwrap) {
+ av_log(avctx, AV_LOG_ERROR,
+ "invalid pred_order %d\n",
+ pred_order);
+ return -1;
+ }
+ for (i=0; i<pred_order; i++)
+ s->decoded[channel][i - pred_order] -= coffset;
+ decode_subframe_lpc(s, channel, residual_size, pred_order);
+ if (coffset != 0)
+ for (i=0; i < s->blocksize; i++)
+ s->decoded[channel][i] += coffset;
}
- for (i=-s->nwrap; i<0; i++)
- s->decoded[channel][i] = s->decoded[channel][i + s->blocksize];
+ }
+ if (s->nmean > 0) {
+ int32_t sum = (s->version < 2) ? 0 : s->blocksize / 2;
+ for (i=0; i<s->blocksize; i++)
+ sum += s->decoded[channel][i];
+
+ for (i=1; i<s->nmean; i++)
+ s->offset[channel][i-1] = s->offset[channel][i];
+
+ if (s->version < 2)
+ s->offset[channel][s->nmean - 1] = sum / s->blocksize;
+ else
+ s->offset[channel][s->nmean - 1] = (sum / s->blocksize) << s->bitshift;
+ }
+ for (i=-s->nwrap; i<0; i++)
+ s->decoded[channel][i] = s->decoded[channel][i + s->blocksize];
- fix_bitshift(s, s->decoded[channel]);
+ fix_bitshift(s, s->decoded[channel]);
- s->cur_chan++;
- if (s->cur_chan == s->channels) {
- samples = interleave_buffer(samples, s->channels, s->blocksize, s->decoded);
- s->cur_chan = 0;
- goto frame_done;
- }
+ s->cur_chan++;
+ if (s->cur_chan == s->channels) {
+ samples = interleave_buffer(samples, s->channels, s->blocksize, s->decoded);
+ s->cur_chan = 0;
+ goto frame_done;
+ }
}
}
frame_done: