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aacenc: Replace loop counters in aac_encode_frame() with more descriptive 'ch' and 'w'.

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This commit is contained in:
Nathan Caldwell 2011-05-06 01:19:51 -06:00 committed by Alex Converse
parent fc7314b31c
commit 5b29af624f
1 changed files with 25 additions and 26 deletions
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49
libavcodec/aacenc.c
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@ -489,7 +489,7 @@ static int aac_encode_frame(AVCodecContext *avctx,
AACEncContext *s = avctx->priv_data; AACEncContext *s = avctx->priv_data;
int16_t *samples = s->samples, *samples2, *la; int16_t *samples = s->samples, *samples2, *la;
ChannelElement *cpe; ChannelElement *cpe;
int i, j, chans, tag, start_ch; int i, ch, w, chans, tag, start_ch;
const uint8_t *chan_map = aac_chan_configs[avctx->channels-1]; const uint8_t *chan_map = aac_chan_configs[avctx->channels-1];
int chan_el_counter[4]; int chan_el_counter[4];
FFPsyWindowInfo windows[AAC_MAX_CHANNELS]; FFPsyWindowInfo windows[AAC_MAX_CHANNELS];
@ -524,34 +524,33 @@ static int aac_encode_frame(AVCodecContext *avctx,
tag = chan_map[i+1]; tag = chan_map[i+1];
chans = tag == TYPE_CPE ? 2 : 1; chans = tag == TYPE_CPE ? 2 : 1;
cpe = &s->cpe[i]; cpe = &s->cpe[i];
for (j = 0; j < chans; j++) { for (ch = 0; ch < chans; ch++) {
IndividualChannelStream *ics = &cpe->ch[j].ics; IndividualChannelStream *ics = &cpe->ch[ch].ics;
int k; int cur_channel = start_ch + ch;
int cur_channel = start_ch + j;
samples2 = samples + cur_channel; samples2 = samples + cur_channel;
la = samples2 + (448+64) * avctx->channels; la = samples2 + (448+64) * avctx->channels;
if (!data) if (!data)
la = NULL; la = NULL;
if (tag == TYPE_LFE) { if (tag == TYPE_LFE) {
wi[j].window_type[0] = ONLY_LONG_SEQUENCE; wi[ch].window_type[0] = ONLY_LONG_SEQUENCE;
wi[j].window_shape = 0; wi[ch].window_shape = 0;
wi[j].num_windows = 1; wi[ch].num_windows = 1;
wi[j].grouping[0] = 1; wi[ch].grouping[0] = 1;
} else { } else {
wi[j] = ff_psy_suggest_window(&s->psy, samples2, la, cur_channel, wi[ch] = ff_psy_suggest_window(&s->psy, samples2, la, cur_channel,
ics->window_sequence[0]); ics->window_sequence[0]);
} }
ics->window_sequence[1] = ics->window_sequence[0]; ics->window_sequence[1] = ics->window_sequence[0];
ics->window_sequence[0] = wi[j].window_type[0]; ics->window_sequence[0] = wi[ch].window_type[0];
ics->use_kb_window[1] = ics->use_kb_window[0]; ics->use_kb_window[1] = ics->use_kb_window[0];
ics->use_kb_window[0] = wi[j].window_shape; ics->use_kb_window[0] = wi[ch].window_shape;
ics->num_windows = wi[j].num_windows; ics->num_windows = wi[ch].num_windows;
ics->swb_sizes = s->psy.bands [ics->num_windows == 8]; ics->swb_sizes = s->psy.bands [ics->num_windows == 8];
ics->num_swb = tag == TYPE_LFE ? 12 : s->psy.num_bands[ics->num_windows == 8]; ics->num_swb = tag == TYPE_LFE ? 12 : s->psy.num_bands[ics->num_windows == 8];
for (k = 0; k < ics->num_windows; k++) for (w = 0; w < ics->num_windows; w++)
ics->group_len[k] = wi[j].grouping[k]; ics->group_len[w] = wi[ch].grouping[w];
apply_window_and_mdct(avctx, s, &cpe->ch[j], samples2); apply_window_and_mdct(avctx, s, &cpe->ch[ch], samples2);
} }
start_ch += chans; start_ch += chans;
} }
@ -569,10 +568,10 @@ static int aac_encode_frame(AVCodecContext *avctx,
cpe = &s->cpe[i]; cpe = &s->cpe[i];
put_bits(&s->pb, 3, tag); put_bits(&s->pb, 3, tag);
put_bits(&s->pb, 4, chan_el_counter[tag]++); put_bits(&s->pb, 4, chan_el_counter[tag]++);
for (j = 0; j < chans; j++) { for (ch = 0; ch < chans; ch++) {
s->cur_channel = start_ch + j; s->cur_channel = start_ch + ch;
ff_psy_set_band_info(&s->psy, s->cur_channel, cpe->ch[j].coeffs, &wi[j]); ff_psy_set_band_info(&s->psy, s->cur_channel, cpe->ch[ch].coeffs, &wi[ch]);
s->coder->search_for_quantizers(avctx, s, &cpe->ch[j], s->lambda); s->coder->search_for_quantizers(avctx, s, &cpe->ch[ch], s->lambda);
} }
cpe->common_window = 0; cpe->common_window = 0;
if (chans > 1 if (chans > 1
@ -580,8 +579,8 @@ static int aac_encode_frame(AVCodecContext *avctx,
&& wi[0].window_shape == wi[1].window_shape) { && wi[0].window_shape == wi[1].window_shape) {
cpe->common_window = 1; cpe->common_window = 1;
for (j = 0; j < wi[0].num_windows; j++) { for (w = 0; w < wi[0].num_windows; w++) {
if (wi[0].grouping[j] != wi[1].grouping[j]) { if (wi[0].grouping[w] != wi[1].grouping[w]) {
cpe->common_window = 0; cpe->common_window = 0;
break; break;
} }
@ -598,9 +597,9 @@ static int aac_encode_frame(AVCodecContext *avctx,
encode_ms_info(&s->pb, cpe); encode_ms_info(&s->pb, cpe);
} }
} }
for (j = 0; j < chans; j++) { for (ch = 0; ch < chans; ch++) {
s->cur_channel = start_ch + j; s->cur_channel = start_ch + ch;
encode_individual_channel(avctx, s, &cpe->ch[j], cpe->common_window); encode_individual_channel(avctx, s, &cpe->ch[ch], cpe->common_window);
} }
start_ch += chans; start_ch += chans;
} }