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flacenc: add option for forcing stereo decorrelation mode 

This is mainly useful for testing.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2012-07-02 14:52:05 +01:00
parent 30327865f3
commit 360aa2465a
1 changed files with 11 additions and 1 deletions
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12
libavcodec/flacenc.c
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@ -53,6 +53,7 @@ typedef struct CompressionOptions {
int prediction_order_method;
int min_partition_order;
int max_partition_order;
int ch_mode;
} CompressionOptions;
typedef struct RiceContext {
@ -1031,7 +1032,10 @@ static void channel_decorrelation(FlacEncodeContext *s)
return;
}
frame->ch_mode = estimate_stereo_mode(left, right, n);
if (s->options.ch_mode < 0)
frame->ch_mode = estimate_stereo_mode(left, right, n);
else
frame->ch_mode = s->options.ch_mode;
/* perform decorrelation and adjust bits-per-sample */
if (frame->ch_mode == FLAC_CHMODE_INDEPENDENT)
@ -1288,6 +1292,12 @@ static const AVOption options[] = {
{ "8level", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = ORDER_METHOD_8LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "search", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = ORDER_METHOD_SEARCH }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "log", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = ORDER_METHOD_LOG }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "ch_mode", "Stereo decorrelation mode", offsetof(FlacEncodeContext, options.ch_mode), AV_OPT_TYPE_INT, { .dbl = -1 }, -1, FLAC_CHMODE_MID_SIDE, FLAGS, "ch_mode" },
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, { .dbl = -1 }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "indep", NULL, 0, AV_OPT_TYPE_CONST, { .dbl = FLAC_CHMODE_INDEPENDENT }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "left_side", NULL, 0, AV_OPT_TYPE_CONST, { .dbl = FLAC_CHMODE_LEFT_SIDE }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "right_side", NULL, 0, AV_OPT_TYPE_CONST, { .dbl = FLAC_CHMODE_RIGHT_SIDE }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "mid_side", NULL, 0, AV_OPT_TYPE_CONST, { .dbl = FLAC_CHMODE_MID_SIDE }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ NULL },
};