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binkaudio: simplify frame_len_bits and frame_len calculation

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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 8a8c283edd)
This commit is contained in:
Peter Ross 2011-02-20 12:24:48 +11:00 committed by Michael Niedermayer
parent 408ee5a90c
commit 8d09fc1930
1 changed files with 2 additions and 4 deletions
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6
libavcodec/binkaudio.c
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@ -81,7 +81,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
} else {
frame_len_bits = 11;
}
s->frame_len = 1 << frame_len_bits;
if (avctx->channels > MAX_CHANNELS) {
av_log(avctx, AV_LOG_ERROR, "too many channels: %d\n", avctx->channels);
@ -91,14 +90,13 @@ static av_cold int decode_init(AVCodecContext *avctx)
if (avctx->codec->id == CODEC_ID_BINKAUDIO_RDFT) {
// audio is already interleaved for the RDFT format variant
sample_rate *= avctx->channels;
s->frame_len *= avctx->channels;
s->channels = 1;
if (avctx->channels == 2)
frame_len_bits++;
frame_len_bits += av_log2(avctx->channels);
} else {
s->channels = avctx->channels;
}
s->frame_len = 1 << frame_len_bits;
s->overlap_len = s->frame_len / 16;
s->block_size = (s->frame_len - s->overlap_len) * s->channels;
sample_rate_half = (sample_rate + 1) / 2;