dv: Move functions used only by the encoder out of a shared header.

1 files changed, 35 insertions, 0 deletions

diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index def0bef8c0..db231fb2bb 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -1190,6 +1190,41 @@ static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
 }
 
 #if CONFIG_DVVIDEO_ENCODER
+static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
+                                  uint8_t seq_num, uint8_t dif_num,
+                                  uint8_t* buf)
+{
+    buf[0] = (uint8_t)t;       /* Section type */
+    buf[1] = (seq_num  << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
+             (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
+             7;                /* reserved -- always 1 */
+    buf[2] = dif_num;          /* DIF block number Video: 0-134, Audio: 0-8 */
+    return 3;
+}
+
+
+static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
+{
+    if (syb_num == 0 || syb_num == 6) {
+        buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
+                 (0  << 4) | /* AP3 (Subcode application ID) */
+                 0x0f;       /* reserved -- always 1 */
+    }
+    else if (syb_num == 11) {
+        buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
+                 0x7f;       /* reserved -- always 1 */
+    }
+    else {
+        buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
+                 (0  << 4) | /* APT (Track application ID) */
+                 0x0f;       /* reserved -- always 1 */
+    }
+    buf[1] = 0xf0 |            /* reserved -- always 1 */
+             (syb_num & 0x0f); /* SSYB number 0 - 11   */
+    buf[2] = 0xff;             /* reserved -- always 1 */
+    return 3;
+}
+
 static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
 {
     int chan, i, j, k;