This is actually defined in the A/52 specification.
---
libavcodec/ac3enc.h | 1 +
libavcodec/ac3enc_opts_template.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavcodec/ac3enc.h b/libavcodec/ac3enc.h
index a66cd22..3c2b42d 100644
--- a/libavcodec/ac3enc.h
+++ b/libavcodec/ac3enc.h
@@ -77,6 +77,7 @@ typedef int64_t CoefSumType;
#define AC3ENC_OPT_NOT_INDICATED 0
#define AC3ENC_OPT_MODE_ON 2
#define AC3ENC_OPT_MODE_OFF 1
+#define AC3ENC_OPT_MODE_RESERVED 3 // defined in A/52 for dsurexmod
(indicates DPL2z)
/* specific option values */
#define AC3ENC_OPT_LARGE_ROOM 1
diff --git a/libavcodec/ac3enc_opts_template.c
b/libavcodec/ac3enc_opts_template.c
index 8cb5ad1..e3f5b46 100644
--- a/libavcodec/ac3enc_opts_template.c
+++ b/libavcodec/ac3enc_opts_template.c
@@ -55,10 +55,11 @@ static const AVOption ac3_options[] = {
{"ltrt_surmixlev", "Lt/Rt Surround Mix Level",
OFFSET(ltrt_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0,
AC3ENC_PARAM},
{"loro_cmixlev", "Lo/Ro Center Mix Level", OFFSET(loro_center_mix_level),
AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, AC3ENC_PARAM},
{"loro_surmixlev", "Lo/Ro Surround Mix Level",
OFFSET(loro_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0,
AC3ENC_PARAM},
-{"dsurex_mode", "Dolby Surround EX Mode", OFFSET(dolby_surround_ex_mode),
AV_OPT_TYPE_INT, {.i64 = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE,
AC3ENC_OPT_MODE_ON, AC3ENC_PARAM, "dsurex_mode"},
+{"dsurex_mode", "Dolby Surround EX Mode", OFFSET(dolby_surround_ex_mode),
AV_OPT_TYPE_INT, {.i64 = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE,
AC3ENC_OPT_MODE_RESERVED, AC3ENC_PARAM, "dsurex_mode"},
{"notindicated", "Not Indicated (default)", 0, AV_OPT_TYPE_CONST,
{.i64 = AC3ENC_OPT_NOT_INDICATED }, INT_MIN, INT_MAX, AC3ENC_PARAM,
"dsurex_mode"},
{"on", "Dolby Surround EX Encoded", 0, AV_OPT_TYPE_CONST,
{.i64 = AC3ENC_OPT_MODE_ON }, INT_MIN, INT_MAX, AC3ENC_PARAM,
"dsurex_mode"},
{"off", "Not Dolby Surround EX Encoded", 0, AV_OPT_TYPE_CONST,
{.i64 = AC3ENC_OPT_MODE_OFF }, INT_MIN, INT_MAX, AC3ENC_PARAM,
"dsurex_mode"},
+ {"dpliiz", "Dolby Pro Logic IIz-encoded", 0, AV_OPT_TYPE_CONST,
{.i64 = AC3ENC_OPT_MODE_RESERVED }, INT_MIN, INT_MAX, AC3ENC_PARAM,
"dsurex_mode"},
{"dheadphone_mode", "Dolby Headphone Mode", OFFSET(dolby_headphone_mode),
AV_OPT_TYPE_INT, {.i64 = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE,
AC3ENC_OPT_MODE_ON, AC3ENC_PARAM, "dheadphone_mode"},
{"notindicated", "Not Indicated (default)", 0, AV_OPT_TYPE_CONST,
{.i64 = AC3ENC_OPT_NOT_INDICATED }, INT_MIN, INT_MAX, AC3ENC_PARAM,
"dheadphone_mode"},
{"on", "Dolby Headphone Encoded", 0, AV_OPT_TYPE_CONST,
{.i64 = AC3ENC_OPT_MODE_ON }, INT_MIN, INT_MAX, AC3ENC_PARAM,
"dheadphone_mode"},
--
1.8.3.4 (Apple Git-47)
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