diff --git a/gst/typefind/gsttypefindfunctions.c b/gst/typefind/gsttypefindfunctions.c index 842680988a..025611747a 100644 --- a/gst/typefind/gsttypefindfunctions.c +++ b/gst/typefind/gsttypefindfunctions.c @@ -1158,6 +1158,10 @@ static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3"); #define AC3_CAPS (gst_static_caps_get(&ac3_caps)) +static GstStaticCaps eac3_caps = GST_STATIC_CAPS ("audio/x-eac3"); + +#define EAC3_CAPS (gst_static_caps_get(&eac3_caps)) + struct ac3_frmsize { unsigned short bit_rate; @@ -1219,37 +1223,68 @@ ac3_type_find (GstTypeFind * tf, gpointer unused) break; if (c.data[0] == 0x0b && c.data[1] == 0x77) { - guint fscod = (c.data[4] >> 6) & 0x03; - guint frmsizecod = c.data[4] & 0x3f; + guint bsid = (c.data[5] >> 3) & 0x1F; - if (fscod < 3 && frmsizecod < 38) { + if (bsid <= 8) { + /* ac3 */ + guint fscod = (c.data[4] >> 6) & 0x03; + guint frmsizecod = c.data[4] & 0x3f; + + if (fscod < 3 && frmsizecod < 38) { + DataScanCtx c_next = c; + guint frame_size; + + frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod]; + GST_LOG ("possible AC3 frame sync at offset %" + G_GUINT64_FORMAT ", size=%u", c.offset, frame_size); + if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) { + data_scan_ctx_advance (tf, &c_next, frame_size * 2); + + if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) { + guint fscod2 = (c_next.data[4] >> 6) & 0x03; + guint frmsizecod2 = c_next.data[4] & 0x3f; + + if (fscod == fscod2 && frmsizecod == frmsizecod2) { + GstTypeFindProbability prob; + + GST_LOG ("found second AC3 frame, looks good"); + if (c.offset == 0) + prob = GST_TYPE_FIND_MAXIMUM; + else + prob = GST_TYPE_FIND_NEARLY_CERTAIN; + + gst_type_find_suggest (tf, prob, AC3_CAPS); + return; + } + } else { + GST_LOG ("no second AC3 frame found, false sync"); + } + } + } + } else { + /* eac3 */ DataScanCtx c_next = c; guint frame_size; - frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod]; - GST_LOG ("possible frame sync at offset %" G_GUINT64_FORMAT ", size=%u", - c.offset, frame_size); + frame_size = ((((c.data[2] & 0x07) << 8) + + (c.data[3] & 0xff)) + 1) << 1; + GST_LOG ("possible E-AC3 frame sync at offset %" + G_GUINT64_FORMAT ", size=%u", c.offset, frame_size); if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) { data_scan_ctx_advance (tf, &c_next, frame_size * 2); if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) { - guint fscod2 = (c_next.data[4] >> 6) & 0x03; - guint frmsizecod2 = c_next.data[4] & 0x3f; + GstTypeFindProbability prob; - if (fscod == fscod2 && frmsizecod == frmsizecod2) { - GstTypeFindProbability prob; + GST_LOG ("found second E-AC3 frame, looks good"); + if (c.offset == 0) + prob = GST_TYPE_FIND_MAXIMUM; + else + prob = GST_TYPE_FIND_NEARLY_CERTAIN; - GST_LOG ("found second frame, looks good"); - if (c.offset == 0) - prob = GST_TYPE_FIND_MAXIMUM; - else - prob = GST_TYPE_FIND_NEARLY_CERTAIN; - - gst_type_find_suggest (tf, prob, AC3_CAPS); - return; - } + gst_type_find_suggest (tf, prob, EAC3_CAPS); } else { - GST_LOG ("no second frame found, false sync"); + GST_LOG ("no second E-AC3 frame found, false sync"); } } } @@ -3873,7 +3908,7 @@ plugin_init (GstPlugin * plugin) "s3m", "stm", "stx", "ult", "xm", NULL }; static const gchar *mp3_exts[] = { "mp3", "mp2", "mp1", "mpga", NULL }; - static const gchar *ac3_exts[] = { "ac3", NULL }; + static const gchar *ac3_exts[] = { "ac3", "eac3", NULL }; static const gchar *dts_exts[] = { "dts", NULL }; static const gchar *gsm_exts[] = { "gsm", NULL }; static const gchar *musepack_exts[] = { "mpc", "mpp", "mp+", NULL };