Split out flv encoding.

Originally committed as revision 21050 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 84 insertions, 0 deletions

diff --git a/libavcodec/flvenc.c b/libavcodec/flvenc.c
new file mode 100644
index 0000000000..c8a630b374
--- /dev/null
+++ b/libavcodec/flvenc.c
@@ -0,0 +1,84 @@
+/*
+ * FLV Encoding specific code.
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "mpegvideo.h"
+#include "flv.h"
+
+void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number)
+{
+      int format;
+
+      align_put_bits(&s->pb);
+
+      put_bits(&s->pb, 17, 1);
+      put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */
+      put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->time_base.num) / //FIXME use timestamp
+                           s->avctx->time_base.den) & 0xff); /* TemporalReference */
+      if (s->width == 352 && s->height == 288)
+        format = 2;
+      else if (s->width == 176 && s->height == 144)
+        format = 3;
+      else if (s->width == 128 && s->height == 96)
+        format = 4;
+      else if (s->width == 320 && s->height == 240)
+        format = 5;
+      else if (s->width == 160 && s->height == 120)
+        format = 6;
+      else if (s->width <= 255 && s->height <= 255)
+        format = 0; /* use 1 byte width & height */
+      else
+        format = 1; /* use 2 bytes width & height */
+      put_bits(&s->pb, 3, format); /* PictureSize */
+      if (format == 0) {
+        put_bits(&s->pb, 8, s->width);
+        put_bits(&s->pb, 8, s->height);
+      } else if (format == 1) {
+        put_bits(&s->pb, 16, s->width);
+        put_bits(&s->pb, 16, s->height);
+      }
+      put_bits(&s->pb, 2, s->pict_type == FF_P_TYPE); /* PictureType */
+      put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
+      put_bits(&s->pb, 5, s->qscale); /* Quantizer */
+      put_bits(&s->pb, 1, 0); /* ExtraInformation */
+
+      if(s->h263_aic){
+        s->y_dc_scale_table=
+          s->c_dc_scale_table= ff_aic_dc_scale_table;
+      }else{
+        s->y_dc_scale_table=
+          s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
+      }
+}
+
+void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level, int run, int last){
+    if(level < 64) { // 7-bit level
+        put_bits(pb, 1, 0);
+        put_bits(pb, 1, last);
+        put_bits(pb, 6, run);
+
+        put_sbits(pb, 7, slevel);
+    } else {
+        /* 11-bit level */
+        put_bits(pb, 1, 1);
+        put_bits(pb, 1, last);
+        put_bits(pb, 6, run);
+
+        put_sbits(pb, 11, slevel);
+    }
+}