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sample: manually inline table lookups

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Manually inline some table lookups to avoid excessive calls to
pa_sample_spec_valid().
This commit is contained in:
Wim Taymans 2009-08-19 17:27:17 +02:00
parent 548b735ccf
commit d2389ef96e
1 changed files with 24 additions and 25 deletions
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49
src/pulse/sample.c
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@ -36,28 +36,27 @@
#include "sample.h" #include "sample.h"
static const size_t size_table[] = {
[PA_SAMPLE_U8] = 1,
[PA_SAMPLE_ULAW] = 1,
[PA_SAMPLE_ALAW] = 1,
[PA_SAMPLE_S16LE] = 2,
[PA_SAMPLE_S16BE] = 2,
[PA_SAMPLE_FLOAT32LE] = 4,
[PA_SAMPLE_FLOAT32BE] = 4,
[PA_SAMPLE_S32LE] = 4,
[PA_SAMPLE_S32BE] = 4,
[PA_SAMPLE_S24LE] = 3,
[PA_SAMPLE_S24BE] = 3,
[PA_SAMPLE_S24_32LE] = 4,
[PA_SAMPLE_S24_32BE] = 4
};
size_t pa_sample_size_of_format(pa_sample_format_t f) { size_t pa_sample_size_of_format(pa_sample_format_t f) {
static const size_t table[] = {
[PA_SAMPLE_U8] = 1,
[PA_SAMPLE_ULAW] = 1,
[PA_SAMPLE_ALAW] = 1,
[PA_SAMPLE_S16LE] = 2,
[PA_SAMPLE_S16BE] = 2,
[PA_SAMPLE_FLOAT32LE] = 4,
[PA_SAMPLE_FLOAT32BE] = 4,
[PA_SAMPLE_S32LE] = 4,
[PA_SAMPLE_S32BE] = 4,
[PA_SAMPLE_S24LE] = 3,
[PA_SAMPLE_S24BE] = 3,
[PA_SAMPLE_S24_32LE] = 4,
[PA_SAMPLE_S24_32BE] = 4
};
pa_assert(f >= 0); pa_assert(f >= 0);
pa_assert(f < PA_SAMPLE_MAX); pa_assert(f < PA_SAMPLE_MAX);
return table[f]; return size_table[f];
} }
size_t pa_sample_size(const pa_sample_spec *spec) { size_t pa_sample_size(const pa_sample_spec *spec) {
@ -65,35 +64,35 @@ size_t pa_sample_size(const pa_sample_spec *spec) {
pa_assert(spec); pa_assert(spec);
pa_return_val_if_fail(pa_sample_spec_valid(spec), 0); pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
return pa_sample_size_of_format(spec->format); return size_table[spec->format];
} }
size_t pa_frame_size(const pa_sample_spec *spec) { size_t pa_frame_size(const pa_sample_spec *spec) {
pa_assert(spec); pa_assert(spec);
pa_return_val_if_fail(pa_sample_spec_valid(spec), 0); pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
return pa_sample_size(spec) * spec->channels; return size_table[spec->format] * spec->channels;
} }
size_t pa_bytes_per_second(const pa_sample_spec *spec) { size_t pa_bytes_per_second(const pa_sample_spec *spec) {
pa_assert(spec); pa_assert(spec);
pa_return_val_if_fail(pa_sample_spec_valid(spec), 0); pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
return spec->rate*pa_frame_size(spec); return spec->rate * size_table[spec->format] * spec->channels;
} }
pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) { pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
pa_assert(spec); pa_assert(spec);
pa_return_val_if_fail(pa_sample_spec_valid(spec), 0); pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
return (((pa_usec_t) (length / pa_frame_size(spec)) * PA_USEC_PER_SEC) / spec->rate); return (((pa_usec_t) (length / (size_table[spec->format] * spec->channels)) * PA_USEC_PER_SEC) / spec->rate);
} }
size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) { size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
pa_assert(spec); pa_assert(spec);
pa_return_val_if_fail(pa_sample_spec_valid(spec), 0); pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
return (size_t) (((t * spec->rate) / PA_USEC_PER_SEC)) * pa_frame_size(spec); return (size_t) (((t * spec->rate) / PA_USEC_PER_SEC)) * (size_table[spec->format] * spec->channels);
} }
pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec) { pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec) {
@ -109,12 +108,12 @@ pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec) {
int pa_sample_spec_valid(const pa_sample_spec *spec) { int pa_sample_spec_valid(const pa_sample_spec *spec) {
pa_assert(spec); pa_assert(spec);
if (spec->rate <= 0 || if (PA_UNLIKELY (spec->rate <= 0 ||
spec->rate > PA_RATE_MAX || spec->rate > PA_RATE_MAX ||
spec->channels <= 0 || spec->channels <= 0 ||
spec->channels > PA_CHANNELS_MAX || spec->channels > PA_CHANNELS_MAX ||
spec->format >= PA_SAMPLE_MAX || spec->format >= PA_SAMPLE_MAX ||
spec->format < 0) spec->format < 0))
return 0; return 0;
return 1; return 1;