[FFmpeg-devel] [PATCH v2 06/18] lavc/h264: replace MAX_DELAYED_PIC_COUNT by H264_MAX_DPB_FRAMES

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

From: Anton Khirnov <anton@khirnov.net>

---
 libavcodec/h264_ps.c    |  4 ++--
 libavcodec/h264_slice.c | 12 ++++++------
 libavcodec/h264dec.h    |  6 ++----
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/libavcodec/h264_ps.c b/libavcodec/h264_ps.c
index e21c2b56ac..f68d5bf81c 100644
--- a/libavcodec/h264_ps.c
+++ b/libavcodec/h264_ps.c
@@ -485,7 +485,7 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
     sps->ref_frame_count = get_ue_golomb_31(gb);
     if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
         sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
-    if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
+    if (sps->ref_frame_count > H264_MAX_DPB_FRAMES) {
         av_log(avctx, AV_LOG_ERROR,
                "too many reference frames %d\n", sps->ref_frame_count);
         goto fail;
@@ -590,7 +590,7 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
      * level */
     if (!sps->bitstream_restriction_flag &&
         (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
-        sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
+        sps->num_reorder_frames = H264_MAX_DPB_FRAMES - 1;
         for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
             if (level_max_dpb_mbs[i][0] == sps->level_idc) {
                 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index d6d4497fc9..32df9fd3ae 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -1456,7 +1456,7 @@ static int h264_select_output_frame(H264Context *h)
     }
 
     for (i = 0; 1; i++) {
-        if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
+        if(i == H264_MAX_DPB_FRAMES || cur->poc < h->last_pocs[i]){
             if(i)
                 h->last_pocs[i-1] = cur->poc;
             break;
@@ -1464,13 +1464,13 @@ static int h264_select_output_frame(H264Context *h)
             h->last_pocs[i-1]= h->last_pocs[i];
         }
     }
-    out_of_order = MAX_DELAYED_PIC_COUNT - i;
+    out_of_order = H264_MAX_DPB_FRAMES - i;
     if(   cur->f->pict_type == AV_PICTURE_TYPE_B
-       || (h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > INT_MIN && h->last_pocs[MAX_DELAYED_PIC_COUNT-1] - (int64_t)h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > 2))
+       || (h->last_pocs[H264_MAX_DPB_FRAMES-2] > INT_MIN && h->last_pocs[H264_MAX_DPB_FRAMES-1] - (int64_t)h->last_pocs[H264_MAX_DPB_FRAMES-2] > 2))
         out_of_order = FFMAX(out_of_order, 1);
-    if (out_of_order == MAX_DELAYED_PIC_COUNT) {
+    if (out_of_order == H264_MAX_DPB_FRAMES) {
         av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
-        for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
+        for (i = 1; i < H264_MAX_DPB_FRAMES; i++)
             h->last_pocs[i] = INT_MIN;
         h->last_pocs[0] = cur->poc;
         cur->mmco_reset = 1;
@@ -1484,7 +1484,7 @@ static int h264_select_output_frame(H264Context *h)
     while (h->delayed_pic[pics])
         pics++;
 
-    av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
+    av_assert0(pics <= H264_MAX_DPB_FRAMES);
 
     h->delayed_pic[pics++] = cur;
     if (cur->reference == 0)
diff --git a/libavcodec/h264dec.h b/libavcodec/h264dec.h
index c7662f930e..7553dd808c 100644
--- a/libavcodec/h264dec.h
+++ b/libavcodec/h264dec.h
@@ -52,8 +52,6 @@
 
 #define H264_MAX_PICTURE_COUNT 36
 
-#define MAX_DELAYED_PIC_COUNT  16
-
 /* Compiling in interlaced support reduces the speed
  * of progressive decoding by about 2%. */
 #define ALLOW_INTERLACE
@@ -465,8 +463,8 @@ typedef struct H264Context {
     H264Ref default_ref[2];
     H264Picture *short_ref[32];
     H264Picture *long_ref[32];
-    H264Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
-    int last_pocs[MAX_DELAYED_PIC_COUNT];
+    H264Picture *delayed_pic[H264_MAX_DPB_FRAMES + 2]; // FIXME size?
+    int last_pocs[H264_MAX_DPB_FRAMES];
     H264Picture *next_output_pic;
     int next_outputed_poc;
     int poc_offset;         ///< PicOrderCnt_offset from SMPTE RDD-2006
-- 
2.32.0

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