Revision 5fc2e007 libavcodec/ac3enc.c
| libavcodec/ac3enc.c | ||
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| 1289 | 1289 |
/** |
| 1290 | 1290 |
* Write one audio block to the output bitstream. |
| 1291 | 1291 |
*/ |
| 1292 |
static void output_audio_block(AC3EncodeContext *s, int block_num)
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static void output_audio_block(AC3EncodeContext *s, int blk)
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{
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int ch, i, baie, rbnd; |
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AC3Block *block = &s->blocks[block_num];
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AC3Block *block = &s->blocks[blk];
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| 1296 | 1296 |
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/* block switching */ |
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for (ch = 0; ch < s->fbw_channels; ch++) |
| ... | ... | |
| 1306 | 1306 |
put_bits(&s->pb, 1, 0); |
| 1307 | 1307 |
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/* channel coupling */ |
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if (!block_num) {
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if (!blk) {
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put_bits(&s->pb, 1, 1); /* coupling strategy present */ |
| 1311 | 1311 |
put_bits(&s->pb, 1, 0); /* no coupling strategy */ |
| 1312 | 1312 |
} else {
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| ... | ... | |
| 1325 | 1325 |
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/* exponent strategy */ |
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for (ch = 0; ch < s->fbw_channels; ch++) |
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put_bits(&s->pb, 2, s->exp_strategy[ch][block_num]);
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put_bits(&s->pb, 2, s->exp_strategy[ch][blk]);
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| 1329 | 1329 |
if (s->lfe_on) |
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put_bits(&s->pb, 1, s->exp_strategy[s->lfe_channel][block_num]);
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put_bits(&s->pb, 1, s->exp_strategy[s->lfe_channel][blk]);
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| 1331 | 1331 |
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/* bandwidth */ |
| 1333 | 1333 |
for (ch = 0; ch < s->fbw_channels; ch++) {
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if (s->exp_strategy[ch][block_num] != EXP_REUSE)
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if (s->exp_strategy[ch][blk] != EXP_REUSE)
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| 1335 | 1335 |
put_bits(&s->pb, 6, s->bandwidth_code[ch]); |
| 1336 | 1336 |
} |
| 1337 | 1337 |
|
| ... | ... | |
| 1339 | 1339 |
for (ch = 0; ch < s->channels; ch++) {
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| 1340 | 1340 |
int nb_groups; |
| 1341 | 1341 |
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if (s->exp_strategy[ch][block_num] == EXP_REUSE)
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if (s->exp_strategy[ch][blk] == EXP_REUSE)
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| 1343 | 1343 |
continue; |
| 1344 | 1344 |
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| 1345 | 1345 |
/* DC exponent */ |
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put_bits(&s->pb, 4, block->grouped_exp[ch][0]); |
| 1347 | 1347 |
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/* exponent groups */ |
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nb_groups = exponent_group_tab[s->exp_strategy[ch][block_num]-1][s->nb_coefs[ch]];
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nb_groups = exponent_group_tab[s->exp_strategy[ch][blk]-1][s->nb_coefs[ch]];
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| 1350 | 1350 |
for (i = 1; i <= nb_groups; i++) |
| 1351 | 1351 |
put_bits(&s->pb, 7, block->grouped_exp[ch][i]); |
| 1352 | 1352 |
|
| ... | ... | |
| 1356 | 1356 |
} |
| 1357 | 1357 |
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| 1358 | 1358 |
/* bit allocation info */ |
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baie = (block_num == 0);
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baie = (blk == 0);
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| 1360 | 1360 |
put_bits(&s->pb, 1, baie); |
| 1361 | 1361 |
if (baie) {
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| 1362 | 1362 |
put_bits(&s->pb, 2, s->slow_decay_code); |
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