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aacenc: Don't make unnecessary compares to the escape value in tight loops.

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Originally committed as revision 19943 to svn://svn.ffmpeg.org/ffmpeg/trunk
release/0.6
Alex Converse 16 years ago
parent 1a918c08e4
commit a71e9b6254
1 changed files with 4 additions and 4 deletions
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  1. 8
      libavcodec/aaccoder.c

8
libavcodec/aaccoder.c
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@ -173,12 +173,12 @@ static float quantize_band_cost(struct AACEncContext *s, const float *in,
for (k = 0; k < dim; k++) {
float t = fabsf(in[i+k]);
float di;
if (vec[k] == 64.0f) { //FIXME: slow
//do not code with escape sequence small values
if (vec[k] == 64.0f && t < 39.0f*IQ) {
if (t < 39.0f*IQ) {
rd = INFINITY;
break;
}
if (vec[k] == 64.0f) { //FIXME: slow
if (t >= CLIPPED_ESCAPE) {
di = t - CLIPPED_ESCAPE;
curbits += 21;
@ -288,12 +288,12 @@ static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
for (k = 0; k < dim; k++) {
float t = fabsf(in[i+k]);
float di;
if (vec[k] == 64.0f) { //FIXME: slow
//do not code with escape sequence small values
if (vec[k] == 64.0f && t < 39.0f*IQ) {
if (t < 39.0f*IQ) {
rd = INFINITY;
break;
}
if (vec[k] == 64.0f) { //FIXME: slow
if (t >= CLIPPED_ESCAPE) {
di = t - CLIPPED_ESCAPE;
curbits += 21;

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