[FFmpeg-devel] [PATCH v2 1/2] avcodec/flashsvenc: add compression_level option

[Ramiro Polla]

This allows setting the compression level used by zlib.
---
 libavcodec/flashsvenc.c              | 10 ++++++++--
 tests/ref/vsynth/vsynth1-flashsv     |  2 +-
 tests/ref/vsynth/vsynth2-flashsv     |  4 ++--
 tests/ref/vsynth/vsynth3-flashsv     |  2 +-
 tests/ref/vsynth/vsynth_lena-flashsv |  2 +-
 5 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/libavcodec/flashsvenc.c b/libavcodec/flashsvenc.c
index 5cf0602f5d..f650e517d0 100644
--- a/libavcodec/flashsvenc.c
+++ b/libavcodec/flashsvenc.c
@@ -67,6 +67,7 @@ typedef struct FlashSVContext {
     unsigned        packet_size;
     int64_t         last_key_frame;
     uint8_t         tmpblock[3 * 256 * 256];
+    int             compression_level;
 } FlashSVContext;
 
 static int copy_region_enc(const uint8_t *sptr, uint8_t *dptr, int dx, int dy,
@@ -121,6 +122,10 @@ static av_cold int flashsv_encode_init(AVCodecContext *avctx)
     nb_blocks = h_blocks * v_blocks;
     s->packet_size = 4 + nb_blocks * (2 + 3 * BLOCK_WIDTH * BLOCK_HEIGHT);
 
+    s->compression_level = avctx->compression_level == FF_COMPRESSION_DEFAULT
+                         ? Z_DEFAULT_COMPRESSION
+                         : av_clip(avctx->compression_level, 0, 9);
+
     return 0;
 }
 
@@ -170,9 +175,10 @@ static int encode_bitstream(FlashSVContext *s, const AVFrame *p, uint8_t *buf,
                                   p->linesize[0], previous_frame);
 
             if (res || *I_frame) {
-                unsigned long zsize = 3 * block_width * block_height;
+                unsigned long zsize = 3 * block_width * block_height + 12;
                 ret = compress2(ptr + 2, &zsize, s->tmpblock,
-                                3 * cur_blk_width * cur_blk_height, 9);
+                                3 * cur_blk_width * cur_blk_height,
+                                s->compression_level);
 
                 if (ret != Z_OK)
                     av_log(s->avctx, AV_LOG_ERROR,
diff --git a/tests/ref/vsynth/vsynth1-flashsv b/tests/ref/vsynth/vsynth1-flashsv
index 8b2783032b..05f9e9432d 100644
--- a/tests/ref/vsynth/vsynth1-flashsv
+++ b/tests/ref/vsynth/vsynth1-flashsv
@@ -1,4 +1,4 @@
-97894502b4cb57aca1105b6333f72dae *tests/data/fate/vsynth1-flashsv.flv
+61b0825258ac6fe85691bdefd892960d *tests/data/fate/vsynth1-flashsv.flv
 14681925 tests/data/fate/vsynth1-flashsv.flv
 791e1fb999deb2e4156e2286d48c4ed1 *tests/data/fate/vsynth1-flashsv.out.rawvideo
 stddev:    2.84 PSNR: 39.04 MAXDIFF:   49 bytes:  7603200/  7603200
diff --git a/tests/ref/vsynth/vsynth2-flashsv b/tests/ref/vsynth/vsynth2-flashsv
index 9bda896687..f659edaab5 100644
--- a/tests/ref/vsynth/vsynth2-flashsv
+++ b/tests/ref/vsynth/vsynth2-flashsv
@@ -1,4 +1,4 @@
-f4b45770dd93b43b4077532e8ef90bfc *tests/data/fate/vsynth2-flashsv.flv
-11636546 tests/data/fate/vsynth2-flashsv.flv
+a2f145e6e44b51f8fc64ead06a994273 *tests/data/fate/vsynth2-flashsv.flv
+11637702 tests/data/fate/vsynth2-flashsv.flv
 7f0fc12c02e68faddc153e69ddd6841c *tests/data/fate/vsynth2-flashsv.out.rawvideo
 stddev:    1.20 PSNR: 46.52 MAXDIFF:   20 bytes:  7603200/  7603200
diff --git a/tests/ref/vsynth/vsynth3-flashsv b/tests/ref/vsynth/vsynth3-flashsv
index 38a34bd71d..cdf9e7bf99 100644
--- a/tests/ref/vsynth/vsynth3-flashsv
+++ b/tests/ref/vsynth/vsynth3-flashsv
@@ -1,4 +1,4 @@
-832fe60169f4d91339458c60a5292924 *tests/data/fate/vsynth3-flashsv.flv
+a05a9ab0ae21925dd10a83639de77d77 *tests/data/fate/vsynth3-flashsv.flv
 171419 tests/data/fate/vsynth3-flashsv.flv
 faa660b0ecaaab1bf9b5d7284019aa01 *tests/data/fate/vsynth3-flashsv.out.rawvideo
 stddev:    2.97 PSNR: 38.67 MAXDIFF:   49 bytes:    86700/    86700
diff --git a/tests/ref/vsynth/vsynth_lena-flashsv b/tests/ref/vsynth/vsynth_lena-flashsv
index 52046cdf2e..7dfec3edf5 100644
--- a/tests/ref/vsynth/vsynth_lena-flashsv
+++ b/tests/ref/vsynth/vsynth_lena-flashsv
@@ -1,4 +1,4 @@
-0667077971e0cb63b5f49c580006e90e *tests/data/fate/vsynth_lena-flashsv.flv
+59cdcf5f92c5113e27b2fda632ccd55c *tests/data/fate/vsynth_lena-flashsv.flv
 12368953 tests/data/fate/vsynth_lena-flashsv.flv
 3a984506f1ebfc9fb73b6814cab201cc *tests/data/fate/vsynth_lena-flashsv.out.rawvideo
 stddev:    0.66 PSNR: 51.73 MAXDIFF:   14 bytes:  7603200/  7603200
-- 
2.30.2