[FFmpeg-cvslog] avcodec/mpegvideodata: Join mpeg1/2 dc scale tables

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Fri Oct 28 12:06:38 2022 +0200| [908b7fcfb29712e5a9cacb005ad734c53e26e72c] | committer: Andreas Rheinhardt

avcodec/mpegvideodata: Join mpeg1/2 dc scale tables

Avoids relocations.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=908b7fcfb29712e5a9cacb005ad734c53e26e72c
---

 libavcodec/mpeg12enc.c     |  2 +-
 libavcodec/mpegvideo_enc.c |  4 ++--
 libavcodec/mpegvideodata.c | 26 +++++++++-----------------
 libavcodec/mpegvideodata.h |  4 ++--
 libavcodec/speedhqenc.c    |  2 +-
 5 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 2db1d93d0e..3ad1cd84a1 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -1148,7 +1148,7 @@ av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
     static AVOnce init_static_once = AV_ONCE_INIT;
 
     s->y_dc_scale_table =
-    s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision];
+    s->c_dc_scale_table = ff_mpeg12_dc_scale_table[s->intra_dc_precision];
 
     s->me.mv_penalty = mv_penalty;
     s->fcode_tab     = fcode_tab;
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 0b709974a1..1bcc849782 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -3736,9 +3736,9 @@ static int encode_picture(MpegEncContext *s, int picture_number)
             s->       intra_matrix[j] = av_clip_uint8((  luma_matrix[i] * s->qscale) >> 3);
         }
         s->y_dc_scale_table=
-        s->c_dc_scale_table= ff_mpeg2_dc_scale_table[s->intra_dc_precision];
+        s->c_dc_scale_table = ff_mpeg12_dc_scale_table[s->intra_dc_precision];
         s->chroma_intra_matrix[0] =
-        s->intra_matrix[0] = ff_mpeg2_dc_scale_table[s->intra_dc_precision][8];
+        s->intra_matrix[0]  = ff_mpeg12_dc_scale_table[s->intra_dc_precision][8];
         ff_convert_matrix(s, s->q_intra_matrix, s->q_intra_matrix16,
                        s->intra_matrix, s->intra_quant_bias, 8, 8, 1);
         ff_convert_matrix(s, s->q_chroma_intra_matrix, s->q_chroma_intra_matrix16,
diff --git a/libavcodec/mpegvideodata.c b/libavcodec/mpegvideodata.c
index b98e90cf43..68ad84276e 100644
--- a/libavcodec/mpegvideodata.c
+++ b/libavcodec/mpegvideodata.c
@@ -30,31 +30,23 @@ const uint8_t ff_mpeg2_non_linear_qscale[32] = {
     56, 64, 72, 80, 88, 96, 104, 112,
 };
 
-const uint8_t ff_mpeg1_dc_scale_table[32] = {
+const uint8_t ff_mpeg12_dc_scale_table[4][32] = {
+{
     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-};
-
-static const uint8_t mpeg2_dc_scale_table1[32] = {
+},
+{
     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-};
-
-static const uint8_t mpeg2_dc_scale_table2[32] = {
+},
+{
     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-};
-
-static const uint8_t mpeg2_dc_scale_table3[32] = {
+},
+{
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-};
-
-const uint8_t *const ff_mpeg2_dc_scale_table[4] = {
-    ff_mpeg1_dc_scale_table,
-    mpeg2_dc_scale_table1,
-    mpeg2_dc_scale_table2,
-    mpeg2_dc_scale_table3,
+},
 };
 
 const uint8_t ff_alternate_horizontal_scan[64] = {
diff --git a/libavcodec/mpegvideodata.h b/libavcodec/mpegvideodata.h
index cf783ef31c..7264b434ae 100644
--- a/libavcodec/mpegvideodata.h
+++ b/libavcodec/mpegvideodata.h
@@ -25,8 +25,8 @@
 extern const uint8_t ff_alternate_horizontal_scan[64];
 extern const uint8_t ff_alternate_vertical_scan[64];
 
-extern const uint8_t ff_mpeg1_dc_scale_table[32];
-extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
+extern const uint8_t ff_mpeg12_dc_scale_table[4][32];
+static const uint8_t *const ff_mpeg1_dc_scale_table = ff_mpeg12_dc_scale_table[0];
 
 extern const uint8_t ff_mpeg2_non_linear_qscale[32];
 
diff --git a/libavcodec/speedhqenc.c b/libavcodec/speedhqenc.c
index 65e66afae4..7269e345d3 100644
--- a/libavcodec/speedhqenc.c
+++ b/libavcodec/speedhqenc.c
@@ -115,7 +115,7 @@ av_cold int ff_speedhq_encode_init(MpegEncContext *s)
     s->intra_chroma_ac_vlc_last_length = uni_speedhq_ac_vlc_len;
 
     s->y_dc_scale_table =
-    s->c_dc_scale_table = ff_mpeg2_dc_scale_table[3];
+    s->c_dc_scale_table = ff_mpeg12_dc_scale_table[3];
 
     switch (s->avctx->pix_fmt) {
     case AV_PIX_FMT_YUV420P: