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Preamp for missing replay-gain

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This commit is contained in:
Daniel Seuthe 2009-06-19 09:02:12 +02:00 committed by Max Kellermann
parent f16d05c633
commit 4ffd9bce5a
4 changed files with 41 additions and 11 deletions
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1
src/conf.c
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@ -196,6 +196,7 @@ void config_global_init(void)
registerConfigParam(CONF_MIXER_CONTROL, 0, 0);
registerConfigParam(CONF_REPLAYGAIN, 0, 0);
registerConfigParam(CONF_REPLAYGAIN_PREAMP, 0, 0);
registerConfigParam(CONF_REPLAYGAIN_MISSING_PREAMP, 0, 0);
registerConfigParam(CONF_VOLUME_NORMALIZATION, 0, 0);
registerConfigParam(CONF_SAMPLERATE_CONVERTER, 0, 0);
registerConfigParam(CONF_AUDIO_BUFFER_SIZE, 0, 0);

1
src/conf.h
View File

@ -48,6 +48,7 @@
#define CONF_MIXER_CONTROL "mixer_control"
#define CONF_REPLAYGAIN "replaygain"
#define CONF_REPLAYGAIN_PREAMP "replaygain_preamp"
#define CONF_REPLAYGAIN_MISSING_PREAMP "replaygain_missing_preamp"
#define CONF_VOLUME_NORMALIZATION "volume_normalization"
#define CONF_SAMPLERATE_CONVERTER "samplerate_converter"
#define CONF_AUDIO_BUFFER_SIZE "audio_buffer_size"

3
src/decoder_api.c
View File

@ -301,8 +301,7 @@ decoder_data(struct decoder *decoder,
/* apply replay gain or normalization */
if (replay_gain_info != NULL &&
replay_gain_mode != REPLAY_GAIN_OFF)
if (replay_gain_mode != REPLAY_GAIN_OFF)
replay_gain_apply(replay_gain_info, dest, nbytes,
&dc.out_audio_format);
else if (normalizationEnabled)

47
src/replay_gain.c
View File

@ -38,6 +38,7 @@ static const char *const replay_gain_mode_names[] = {
enum replay_gain_mode replay_gain_mode = REPLAY_GAIN_OFF;
static float replay_gain_preamp = 1.0;
static float replay_gain_missing_preamp = 1.0;
void replay_gain_global_init(void)
{
@ -73,6 +74,25 @@ void replay_gain_global_init(void)
replay_gain_preamp = pow(10, f / 20.0);
}
param = config_get_param(CONF_REPLAYGAIN_MISSING_PREAMP);
if (param) {
char *test;
float f = strtod(param->value, &test);
if (*test != '\0') {
g_error("Replaygain missing preamp \"%s\" is not a number at "
"line %i\n", param->value, param->line);
}
if (f < -15 || f > 15) {
g_error("Replaygain missing preamp \"%s\" is not between -15 and"
"15 at line %i\n", param->value, param->line);
}
replay_gain_missing_preamp = pow(10, f / 20.0);
}
}
static float calc_replay_gain_scale(float gain, float peak)
@ -116,19 +136,28 @@ void
replay_gain_apply(struct replay_gain_info *info, char *buffer, int size,
const struct audio_format *format)
{
if (replay_gain_mode == REPLAY_GAIN_OFF || !info)
float scale;
if (replay_gain_mode == REPLAY_GAIN_OFF)
return;
if (info->scale < 0) {
const struct replay_gain_tuple *tuple =
&info->tuples[replay_gain_mode];
if (info) {
if (info->scale < 0) {
const struct replay_gain_tuple *tuple =
&info->tuples[replay_gain_mode];
g_debug("computing ReplayGain %s scale with gain %f, peak %f\n",
replay_gain_mode_names[replay_gain_mode],
tuple->gain, tuple->peak);
g_debug("computing ReplayGain %s scale with gain %f, peak %f\n",
replay_gain_mode_names[replay_gain_mode],
tuple->gain, tuple->peak);
info->scale = calc_replay_gain_scale(tuple->gain, tuple->peak);
info->scale = calc_replay_gain_scale(tuple->gain, tuple->peak);
}
scale = info->scale;
}
else {
scale = replay_gain_missing_preamp;
g_debug("ReplayGain is missing, computing scale %f\n", scale);
}
pcm_volume(buffer, size, format, pcm_float_to_volume(info->scale));
pcm_volume(buffer, size, format, pcm_float_to_volume(scale));
}