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af_pan: remove dual double/int storage of gain. 

libswresample takes care of that now.
This commit is contained in:
Nicolas George 2012-02-20 21:25:12 +01:00
parent d00bc6a8fd
commit 4217dfe87b
1 changed files with 9 additions and 23 deletions
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32
libavfilter/af_pan.c
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@ -37,11 +37,7 @@
typedef struct PanContext { typedef struct PanContext {
int64_t out_channel_layout; int64_t out_channel_layout;
union { double gain[MAX_CHANNELS][MAX_CHANNELS];
double d[MAX_CHANNELS][MAX_CHANNELS];
// i is 1:7:8 fixed-point, i.e. in [-128*256; +128*256[
int i[MAX_CHANNELS][MAX_CHANNELS];
} gain;
int64_t need_renorm; int64_t need_renorm;
int need_renumber; int need_renumber;
int nb_input_channels; int nb_input_channels;
@ -171,7 +167,7 @@ static av_cold int init(AVFilterContext *ctx, const char *args0, void *opaque)
"Can not mix named and numbered channels\n"); "Can not mix named and numbered channels\n");
return AVERROR(EINVAL); return AVERROR(EINVAL);
} }
pan->gain.d[out_ch_id][in_ch_id] = gain; pan->gain[out_ch_id][in_ch_id] = gain;
if (!*arg) if (!*arg)
break; break;
if (*arg != '+') { if (*arg != '+') {
@ -196,7 +192,7 @@ static int are_gains_pure(const PanContext *pan)
int nb_gain = 0; int nb_gain = 0;
for (j = 0; j < MAX_CHANNELS; j++) { for (j = 0; j < MAX_CHANNELS; j++) {
double gain = pan->gain.d[i][j]; double gain = pan->gain[i][j];
/* channel mapping is effective only if 0% or 100% of a channel is /* channel mapping is effective only if 0% or 100% of a channel is
* selected... */ * selected... */
@ -247,7 +243,7 @@ static int config_props(AVFilterLink *link)
for (i = j = 0; i < MAX_CHANNELS; i++) { for (i = j = 0; i < MAX_CHANNELS; i++) {
if ((link->channel_layout >> i) & 1) { if ((link->channel_layout >> i) & 1) {
for (k = 0; k < pan->nb_output_channels; k++) for (k = 0; k < pan->nb_output_channels; k++)
pan->gain.d[k][j] = pan->gain.d[k][i]; pan->gain[k][j] = pan->gain[k][i];
j++; j++;
} }
} }
@ -278,7 +274,7 @@ static int config_props(AVFilterLink *link)
for (i = 0; i < pan->nb_output_channels; i++) { for (i = 0; i < pan->nb_output_channels; i++) {
int ch_id = -1; int ch_id = -1;
for (j = 0; j < pan->nb_input_channels; j++) { for (j = 0; j < pan->nb_input_channels; j++) {
if (pan->gain.d[i][j]) { if (pan->gain[i][j]) {
ch_id = j; ch_id = j;
break; break;
} }
@ -296,7 +292,7 @@ static int config_props(AVFilterLink *link)
continue; continue;
t = 0; t = 0;
for (j = 0; j < pan->nb_input_channels; j++) for (j = 0; j < pan->nb_input_channels; j++)
t += pan->gain.d[i][j]; t += pan->gain[i][j];
if (t > -1E-5 && t < 1E-5) { if (t > -1E-5 && t < 1E-5) {
// t is almost 0 but not exactly, this is probably a mistake // t is almost 0 but not exactly, this is probably a mistake
if (t) if (t)
@ -305,12 +301,11 @@ static int config_props(AVFilterLink *link)
continue; continue;
} }
for (j = 0; j < pan->nb_input_channels; j++) for (j = 0; j < pan->nb_input_channels; j++)
pan->gain.d[i][j] /= t; pan->gain[i][j] /= t;
} }
av_opt_set_int(pan->swr, "icl", link->channel_layout, 0); av_opt_set_int(pan->swr, "icl", link->channel_layout, 0);
av_opt_set_int(pan->swr, "ocl", pan->out_channel_layout, 0); av_opt_set_int(pan->swr, "ocl", pan->out_channel_layout, 0);
swr_set_matrix(pan->swr, pan->gain.d[0], swr_set_matrix(pan->swr, pan->gain[0], pan->gain[1] - pan->gain[0]);
pan->gain.d[1] - pan->gain.d[0]);
} }
r = swr_init(pan->swr); r = swr_init(pan->swr);
@ -322,7 +317,7 @@ static int config_props(AVFilterLink *link)
cur = buf; cur = buf;
for (j = 0; j < pan->nb_input_channels; j++) { for (j = 0; j < pan->nb_input_channels; j++) {
r = snprintf(cur, buf + sizeof(buf) - cur, "%s%.3g i%d", r = snprintf(cur, buf + sizeof(buf) - cur, "%s%.3g i%d",
j ? " + " : "", pan->gain.d[i][j], j); j ? " + " : "", pan->gain[i][j], j);
cur += FFMIN(buf + sizeof(buf) - cur, r); cur += FFMIN(buf + sizeof(buf) - cur, r);
} }
av_log(ctx, AV_LOG_INFO, "o%d = %s\n", i, buf); av_log(ctx, AV_LOG_INFO, "o%d = %s\n", i, buf);
@ -338,15 +333,6 @@ static int config_props(AVFilterLink *link)
av_log(ctx, AV_LOG_INFO, "\n"); av_log(ctx, AV_LOG_INFO, "\n");
return 0; return 0;
} }
// convert to integer
for (i = 0; i < pan->nb_output_channels; i++) {
for (j = 0; j < pan->nb_input_channels; j++) {
if (pan->gain.d[i][j] < -128 || pan->gain.d[i][j] > 128)
av_log(ctx, AV_LOG_WARNING,
"Gain #%d->#%d too large, clamped\n", j, i);
pan->gain.i[i][j] = av_clipf(pan->gain.d[i][j], -128, 128) * 256.0;
}
}
return 0; return 0;
} }