Defines various common FLV format values between the FLV muxer and demuxer

in a common flv.h.
patch by Allan Hsu  allan _at_ counterpop.net

Originally committed as revision 7231 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 108 insertions, 0 deletions

diff --git a/libavformat/flv.h b/libavformat/flv.h
new file mode 100644
index 0000000000..3d05857afa
--- /dev/null
+++ b/libavformat/flv.h
@@ -0,0 +1,108 @@
+/**
+ * @file flv.h
+ * FLV common header
+ *
+ * Copyright (c) 2006 The FFmpeg Project.
+ *
+ * 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
+ */
+
+#ifndef FLV_H
+#define FLV_H
+
+/* offsets for packed values */
+#define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
+#define FLV_AUDIO_SAMPLERATE_OFFSET  2
+#define FLV_AUDIO_CODECID_OFFSET     4
+
+#define FLV_VIDEO_FRAMETYPE_OFFSET   4
+
+/* bitmasks to isolate specific values */
+#define FLV_AUDIO_CHANNEL_MASK    0x01
+#define FLV_AUDIO_SAMPLESIZE_MASK 0x02
+#define FLV_AUDIO_SAMPLERATE_MASK 0x0c
+#define FLV_AUDIO_CODECID_MASK    0xf0
+
+#define FLV_VIDEO_CODECID_MASK    0x0f
+#define FLV_VIDEO_FRAMETYPE_MASK  0xf0
+
+#define AMF_END_OF_OBJECT         0x09
+
+enum {
+    FLV_HEADER_FLAG_HASVIDEO = 1,
+    FLV_HEADER_FLAG_HASAUDIO = 4,
+};
+
+enum {
+    FLV_TAG_TYPE_AUDIO = 0x08,
+    FLV_TAG_TYPE_VIDEO = 0x09,
+    FLV_TAG_TYPE_META  = 0x12,
+};
+
+enum {
+    FLV_MONO   = 0,
+    FLV_STEREO = 1,
+};
+
+enum {
+    FLV_SAMPLESSIZE_8BIT  = 0,
+    FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
+};
+
+enum {
+    FLV_SAMPLERATE_SPECIAL = 0, /**< signifies 5512Hz and 8000Hz in the case of NELLYMOSER */
+    FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
+    FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
+    FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
+};
+
+enum {
+    FLV_CODECID_PCM_BE              = 0,
+    FLV_CODECID_ADPCM               = 1 << FLV_AUDIO_CODECID_OFFSET,
+    FLV_CODECID_MP3                 = 2 << FLV_AUDIO_CODECID_OFFSET,
+    FLV_CODECID_PCM_LE              = 3 << FLV_AUDIO_CODECID_OFFSET,
+    FLV_CODECID_NELLYMOSER_8HZ_MONO = 5 << FLV_AUDIO_CODECID_OFFSET,
+    FLV_CODECID_NELLYMOSER          = 6 << FLV_AUDIO_CODECID_OFFSET,
+};
+
+enum {
+    FLV_CODECID_H263   = 2,
+    FLV_CODECID_SCREEN = 3,
+    FLV_CODECID_VP6    = 4,
+};
+
+enum {
+    FLV_FRAME_KEY        = 1 << FLV_VIDEO_FRAMETYPE_OFFSET,
+    FLV_FRAME_INTER      = 2 << FLV_VIDEO_FRAMETYPE_OFFSET,
+    FLV_FRAME_DISP_INTER = 3 << FLV_VIDEO_FRAMETYPE_OFFSET,
+};
+
+typedef enum {
+    AMF_DATA_TYPE_NUMBER      = 0x00,
+    AMF_DATA_TYPE_BOOL        = 0x01,
+    AMF_DATA_TYPE_STRING      = 0x02,
+    AMF_DATA_TYPE_OBJECT      = 0x03,
+    AMF_DATA_TYPE_NULL        = 0x05,
+    AMF_DATA_TYPE_UNDEFINED   = 0x06,
+    AMF_DATA_TYPE_REFERENCE   = 0x07,
+    AMF_DATA_TYPE_MIXEDARRAY  = 0x08,
+    AMF_DATA_TYPE_ARRAY       = 0x0a,
+    AMF_DATA_TYPE_DATE        = 0x0b,
+    AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
+} AMFDataType;
+
+#endif /* FLV_H */