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replay_gain: added function defined()

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This function determines whether replay gain data is available.
This commit is contained in:
Max Kellermann 2010-02-15 14:36:05 +01:00
parent f4e9275f7c
commit eeef501ed8
2 changed files with 17 additions and 11 deletions
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8
src/replay_gain_info.h
View File

@ -22,6 +22,8 @@
#include "check.h"
#include <stdbool.h>
enum replay_gain_mode {
REPLAY_GAIN_OFF = -1,
REPLAY_GAIN_ALBUM,
@ -49,4 +51,10 @@ replay_gain_info_dup(const struct replay_gain_info *src);
void
replay_gain_info_free(struct replay_gain_info *info);
static inline bool
replay_gain_tuple_defined(const struct replay_gain_tuple *tuple)
{
return tuple->gain > 0.0;
}
#endif

12
src/replay_gain_state.c
View File

@ -42,7 +42,7 @@ replay_gain_state_new(float preamp, float missing_preamp)
struct replay_gain_state *state = g_new(struct replay_gain_state, 1);
state->preamp = preamp;
state->missing_preamp = missing_preamp;
state->scale = state->missing_preamp = missing_preamp;
state->mode = REPLAY_GAIN_OFF;
state->info = NULL;
@ -65,8 +65,6 @@ calc_replay_gain_scale(float gain, float peak, float preamp)
{
float scale;
if (gain == 0.0)
return (1);
scale = pow(10.0, gain / 20.0);
scale *= preamp;
if (scale > 15.0)
@ -88,12 +86,14 @@ replay_gain_state_calc_scale(struct replay_gain_state *state)
const struct replay_gain_tuple *tuple =
&state->info->tuples[state->mode];
if (replay_gain_tuple_defined(tuple)) {
g_debug("computing ReplayGain scale with gain %f, peak %f",
tuple->gain, tuple->peak);
state->scale = calc_replay_gain_scale(tuple->gain, tuple->peak,
state->preamp);
} else
state->scale = state->missing_preamp;
}
void
@ -136,7 +136,5 @@ replay_gain_state_apply(const struct replay_gain_state *state,
if (state->mode == REPLAY_GAIN_OFF)
return;
float scale = state->info != NULL
? state->scale : state->missing_preamp;
pcm_volume(buffer, size, format, pcm_float_to_volume(scale));
pcm_volume(buffer, size, format, pcm_float_to_volume(state->scale));
}