mpegplayer: Make playback engine fully seekable and frame-accurate and split into logical parts. Be sure to have all current features work. Actual UI for seeking will be added soon. Recommended GOP size is about 15-30 frames depending on target or seeking can be slow with really long GOPs (nature of MPEG video). More refined encoding recommendations for a particular player should be posted soon.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15977 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 120 insertions, 0 deletions

diff --git a/apps/plugins/mpegplayer/mpeg_stream.h b/apps/plugins/mpegplayer/mpeg_stream.h
new file mode 100644
index 0000000..0c850f0
--- /dev/null
+++ b/apps/plugins/mpegplayer/mpeg_stream.h
@@ -0,0 +1,120 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Stream definitions for MPEG
+ *
+ * Copyright (c) 2007 Michael Sevakis
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef MPEG_STREAM_H
+#define MPEG_STREAM_H
+
+/* Codes for various header byte sequences - MSB represents lowest memory
+   address */
+#define PACKET_START_CODE_PREFIX    0x00000100ul
+#define END_CODE                    0x000001b9ul
+#define PACK_START_CODE             0x000001baul
+#define SYSTEM_HEADER_START_CODE    0x000001bbul
+
+/* p = base pointer, b0 - b4 = byte offsets from p */
+/* We only care about the MS 32 bits of the 33 and so the ticks are 45kHz */
+#define TS_FROM_HEADER(p, b0) \
+        ((uint32_t)((((p)[(b0)+0] & 0x0e) << 28) | \
+                    (((p)[(b0)+1]       ) << 21) | \
+                    (((p)[(b0)+2] & 0xfe) << 13) | \
+                    (((p)[(b0)+3]       ) <<  6) | \
+                    (((p)[(b0)+4]       ) >>  2)))
+
+#define TS_CHECK_MARKERS(p, b0) \
+        (((((p)[(b0)+0] & 0x01) << 2) |         \
+          (((p)[(b0)+2] & 0x01) << 1) |         \
+          (((p)[(b0)+4] & 0x01)     )) == 0x07)
+
+/* Get the SCR in our 45kHz ticks. Ignore the 9-bit extension */
+#define MPEG2_PACK_HEADER_SCR(p, b0) \
+    ((uint32_t)((((p)[(b0)+0] & 0x38) << 26) | \
+                (((p)[(b0)+0] & 0x03) << 27) | \
+                (((p)[(b0)+1]       ) << 19) | \
+                (((p)[(b0)+2] & 0xf8) << 11) | \
+                (((p)[(b0)+2] & 0x03) << 12) | \
+                (((p)[(b0)+3]       ) <<  4) | \
+                (((p)[(b0)+4]       ) >>  4)))
+
+#define MPEG2_CHECK_PACK_SCR_MARKERS(ph, b0) \
+         (((((ph)[(b0)+0] & 0x04)     ) |        \
+           (((ph)[(b0)+2] & 0x04) >> 1) |        \
+           (((ph)[(b0)+4] & 0x04) >> 2)) == 0x07)
+
+#define INVALID_TIMESTAMP (~(uint32_t)0)
+#define MAX_TIMESTAMP     (INVALID_TIMESTAMP-1)
+#define TS_SECOND (45000) /* Timestamp ticks per second */
+#define TC_SECOND (27000000) /* MPEG timecode ticks per second */
+
+/* These values immediately follow the start code prefix '00 00 01' */
+
+/* Video start codes */
+#define MPEG_START_PICTURE              0x00
+#define MPEG_START_SLICE_FIRST          0x01
+#define MPEG_START_SLICE_LAST           0xaf
+#define MPEG_START_RESERVED_1           0xb0
+#define MPEG_START_RESERVED_2           0xb1
+#define MPEG_START_USER_DATA            0xb2
+#define MPEG_START_SEQUENCE_HEADER      0xb3
+#define MPEG_START_SEQUENCE_ERROR       0xb4
+#define MPEG_START_EXTENSION            0xb5
+#define MPEG_START_RESERVED_3           0xb6
+#define MPEG_START_SEQUENCE_END         0xb7
+#define MPEG_START_GOP                  0xb8
+
+/* Stream IDs */
+#define MPEG_STREAM_PROGRAM_END         0xb9
+#define MPEG_STREAM_PACK_HEADER         0xba
+#define MPEG_STREAM_SYSTEM_HEADER       0xbb
+#define MPEG_STREAM_PROGRAM_STREAM_MAP  0xbc
+#define MPEG_STREAM_PRIVATE_1           0xbd
+#define MPEG_STREAM_PADDING             0xbe
+#define MPEG_STREAM_PRIVATE_2           0xbf
+#define MPEG_STREAM_AUDIO_FIRST         0xc0
+#define MPEG_STREAM_AUDIO_LAST          0xcf
+#define MPEG_STREAM_VIDEO_FIRST         0xe0
+#define MPEG_STREAM_VIDEO_LAST          0xef
+#define MPEG_STREAM_ECM                 0xf0
+#define MPEG_STREAM_EMM                 0xf1
+/* ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A or
+ * ISO/IEC 13818-6_DSMCC_stream */
+#define MPEG_STREAM_MISC_1              0xf2
+/* ISO/IEC_13522_stream */
+#define MPEG_STREAM_MISC_2              0xf3
+/* ITU-T Rec. H.222.1 type A - E */
+#define MPEG_STREAM_MISC_3              0xf4
+#define MPEG_STREAM_MISC_4              0xf5
+#define MPEG_STREAM_MISC_5              0xf6
+#define MPEG_STREAM_MISC_6              0xf7
+#define MPEG_STREAM_MISC_7              0xf8
+#define MPEG_STREAM_ANCILLARY           0xf9
+#define MPEG_STREAM_RESERVED_FIRST      0xfa
+#define MPEG_STREAM_RESERVED_LAST       0xfe
+/* Program stream directory */
+#define MPEG_STREAM_PROGRAM_DIRECTORY   0xff
+
+#define STREAM_IS_AUDIO(s) (((s) & 0xf0) == 0xc0)
+#define STREAM_IS_VIDEO(s) (((s) & 0xf0) == 0xe0)
+
+#define MPEG_MAX_PACKET_SIZE (64*1024+16)
+
+/* Largest MPEG audio frame - MPEG1, Layer II, 384kbps, 32kHz, pad */
+#define MPA_MAX_FRAME_SIZE 1729
+
+#endif /* MPEG_STREAM_H */