[FFmpeg-devel] [PATCH] avcodec: add option to make is_intra_more_likely() from error concealment return "no"

[Michael Niedermayer]

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavcodec/avcodec.h          |    1 +
 libavcodec/error_resilience.c |    3 +++
 libavcodec/options_table.h    |    1 +
 3 files changed, 5 insertions(+)

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 94d4cf0..c191d23 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2556,6 +2556,7 @@ typedef struct AVCodecContext {
     int error_concealment;
 #define FF_EC_GUESS_MVS   1
 #define FF_EC_DEBLOCK     2
+#define FF_EC_FAVOR_INTER 256
 
     /**
      * debug
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index 670e592..7bb7860 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -686,6 +686,9 @@ static int is_intra_more_likely(ERContext *s)
     if (!s->last_pic.f || !s->last_pic.f->data[0])
         return 1; // no previous frame available -> use spatial prediction
 
+    if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
+        return 0;
+
     undamaged_count = 0;
     for (i = 0; i < s->mb_num; i++) {
         const int mb_xy = s->mb_index2xy[i];
diff --git a/libavcodec/options_table.h b/libavcodec/options_table.h
index 0059ea9..f115ea7 100644
--- a/libavcodec/options_table.h
+++ b/libavcodec/options_table.h
@@ -223,6 +223,7 @@ static const AVOption avcodec_options[] = {
 {"ec", "set error concealment strategy", OFFSET(error_concealment), AV_OPT_TYPE_FLAGS, {.i64 = 3 }, INT_MIN, INT_MAX, V|D, "ec"},
 {"guess_mvs", "iterative motion vector (MV) search (slow)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_EC_GUESS_MVS }, INT_MIN, INT_MAX, V|D, "ec"},
 {"deblock", "use strong deblock filter for damaged MBs", 0, AV_OPT_TYPE_CONST, {.i64 = FF_EC_DEBLOCK }, INT_MIN, INT_MAX, V|D, "ec"},
+{"favor_inter", "favor predicting from the previous frame", 0, AV_OPT_TYPE_CONST, {.i64 = FF_EC_FAVOR_INTER }, INT_MIN, INT_MAX, V|D, "ec"},
 {"bits_per_coded_sample", NULL, OFFSET(bits_per_coded_sample), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX},
 {"pred", "prediction method", OFFSET(prediction_method), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E, "pred"},
 {"left", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_PRED_LEFT }, INT_MIN, INT_MAX, V|E, "pred"},
-- 
1.7.9.5