ffmpeg-2.1.1: move directory

git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-02-05 22:14:10 +00:00
parent a4b787f4b8
commit ecf3e862ea
4011 changed files with 1868 additions and 4 deletions
--- a/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/ac3dec.c
+++ b/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/ac3dec.c
@@ -0,0 +1,123 @@
+/*
+ * RAW AC-3 and E-AC-3 demuxer
+ * Copyright (c) 2007 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * 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 "libavutil/crc.h"
+#include "libavcodec/ac3_parser.h"
+#include "avformat.h"
+#include "rawdec.h"
+
+static int ac3_eac3_probe(AVProbeData *p, enum AVCodecID expected_codec_id)
+{
+    int max_frames, first_frames = 0, frames;
+    const uint8_t *buf, *buf2, *end;
+    AC3HeaderInfo hdr;
+    GetBitContext gbc;
+    enum AVCodecID codec_id = AV_CODEC_ID_AC3;
+
+    max_frames = 0;
+    buf = p->buf;
+    end = buf + p->buf_size;
+
+    for(; buf < end; buf++) {
+        if(buf > p->buf && !(buf[0] == 0x0B && buf[1] == 0x77)
+                        && !(buf[0] == 0x77 && buf[1] == 0x0B) )
+            continue;
+        buf2 = buf;
+
+        for(frames = 0; buf2 < end; frames++) {
+            uint8_t buf3[4096];
+            int i;
+            if(!memcmp(buf2, "\x1\x10\0\0\0\0\0\0", 8))
+                buf2+=16;
+            if (buf[0] == 0x77 && buf[1] == 0x0B) {
+                for(i=0; i<8; i+=2) {
+                    buf3[i  ] = buf[i+1];
+                    buf3[i+1] = buf[i  ];
+                }
+                init_get_bits(&gbc, buf3, 54);
+            }else
+                init_get_bits(&gbc, buf2, 54);
+            if(avpriv_ac3_parse_header(&gbc, &hdr) < 0)
+                break;
+            if(buf2 + hdr.frame_size > end)
+                break;
+            if (buf[0] == 0x77 && buf[1] == 0x0B) {
+                av_assert0(hdr.frame_size <= sizeof(buf3));
+                for(i=8; i<hdr.frame_size; i+=2) {
+                    buf3[i  ] = buf[i+1];
+                    buf3[i+1] = buf[i  ];
+                }
+            }
+            if(av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, gbc.buffer + 2, hdr.frame_size - 2))
+                break;
+            if (hdr.bitstream_id > 10)
+                codec_id = AV_CODEC_ID_EAC3;
+            buf2 += hdr.frame_size;
+        }
+        max_frames = FFMAX(max_frames, frames);
+        if(buf == p->buf)
+            first_frames = frames;
+    }
+    if(codec_id != expected_codec_id) return 0;
+    // keep this in sync with mp3 probe, both need to avoid
+    // issues with MPEG-files!
+    if   (first_frames>=4) return AVPROBE_SCORE_EXTENSION + 1;
+    else if(max_frames>200)return AVPROBE_SCORE_EXTENSION;
+    else if(max_frames>=4) return AVPROBE_SCORE_EXTENSION/2;
+    else if(max_frames>=1) return 1;
+    else                   return 0;
+}
+
+#if CONFIG_AC3_DEMUXER
+static int ac3_probe(AVProbeData *p)
+{
+    return ac3_eac3_probe(p, AV_CODEC_ID_AC3);
+}
+
+AVInputFormat ff_ac3_demuxer = {
+    .name           = "ac3",
+    .long_name      = NULL_IF_CONFIG_SMALL("raw AC-3"),
+    .read_probe     = ac3_probe,
+    .read_header    = ff_raw_audio_read_header,
+    .read_packet    = ff_raw_read_partial_packet,
+    .flags= AVFMT_GENERIC_INDEX,
+    .extensions = "ac3",
+    .raw_codec_id   = AV_CODEC_ID_AC3,
+};
+#endif
+
+#if CONFIG_EAC3_DEMUXER
+static int eac3_probe(AVProbeData *p)
+{
+    return ac3_eac3_probe(p, AV_CODEC_ID_EAC3);
+}
+
+AVInputFormat ff_eac3_demuxer = {
+    .name           = "eac3",
+    .long_name      = NULL_IF_CONFIG_SMALL("raw E-AC-3"),
+    .read_probe     = eac3_probe,
+    .read_header    = ff_raw_audio_read_header,
+    .read_packet    = ff_raw_read_partial_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "eac3",
+    .raw_codec_id   = AV_CODEC_ID_EAC3,
+};
+#endif