media: dvb: dvb-core: Add new features for MPQ use-cases
MPQ requires dvb/demux and dvb/video devices for
broadcast feature. Linux dvb-core was extended to
enable extra features required for MPQ use-cases
that dvb-core did not support originally.
New features:
- Add handling of transport streams with TS packets of
192-bytes (in addition to TS packets of 188-bytes),
required for Bluray/DLNA transport streams.
- Support mmap to optimize data transfer between kernel
and user-space for high-bitrate streams.
- Support pull-mode when playing from memory so that
buffers are not overflowed as in the case of live
playback (push-mode).
- Support setting buffer-size of filters with data
tunneled to decoder.
Change-Id: Ia357186874165ba218773ede3cf5b5e2dab91567
Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>
diff --git a/include/linux/dvb/dmx.h b/include/linux/dvb/dmx.h
index f078f3a..7f963e6 100644
--- a/include/linux/dvb/dmx.h
+++ b/include/linux/dvb/dmx.h
@@ -5,6 +5,8 @@
* & Ralph Metzler <ralph@convergence.de>
* for convergence integrated media GmbH
*
+ * Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
* This program 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
@@ -119,6 +121,29 @@
__u32 flags;
};
+struct dmx_buffer_status {
+ /* size of buffer in bytes */
+ unsigned int size;
+
+ /* fullness of buffer in bytes */
+ unsigned int fullness;
+
+ /*
+ * How many bytes are free
+ * It's the same as: size-fullness-1
+ */
+ unsigned int free_bytes;
+
+ /* read pointer offset in bytes */
+ unsigned int read_offset;
+
+ /* write pointer offset in bytes */
+ unsigned int write_offset;
+
+ /* non-zero if data error occured */
+ int error;
+};
+
typedef struct dmx_caps {
__u32 caps;
int num_decoders;
@@ -135,6 +160,34 @@
DMX_SOURCE_DVR3
} dmx_source_t;
+enum dmx_tsp_format_t {
+ DMX_TSP_FORMAT_188 = 0,
+ DMX_TSP_FORMAT_192_TAIL,
+ DMX_TSP_FORMAT_192_HEAD,
+ DMX_TSP_FORMAT_204,
+};
+
+enum dmx_playback_mode_t {
+ /*
+ * In push mode, if one of output buffers
+ * is full, the buffer would overflow
+ * and demux continue processing incoming stream.
+ * This is the default mode. When playing from frontend,
+ * this is the only mode that is allowed.
+ */
+ DMX_PB_MODE_PUSH = 0,
+
+ /*
+ * In pull mode, if one of output buffers
+ * is full, demux stalls waiting for free space,
+ * this would cause DVR input buffer fullness
+ * to accumulate.
+ * This mode is possible only when playing
+ * from DVR.
+ */
+ DMX_PB_MODE_PULL,
+};
+
struct dmx_stc {
unsigned int num; /* input : which STC? 0..N */
unsigned int base; /* output: divisor for stc to get 90 kHz clock */
@@ -153,5 +206,12 @@
#define DMX_GET_STC _IOWR('o', 50, struct dmx_stc)
#define DMX_ADD_PID _IOW('o', 51, __u16)
#define DMX_REMOVE_PID _IOW('o', 52, __u16)
+#define DMX_SET_TS_PACKET_FORMAT _IOW('o', 53, enum dmx_tsp_format_t)
+#define DMX_SET_TS_OUT_FORMAT _IOW('o', 54, enum dmx_tsp_format_t)
+#define DMX_SET_DECODER_BUFFER_SIZE _IO('o', 55)
+#define DMX_GET_BUFFER_STATUS _IOR('o', 56, struct dmx_buffer_status)
+#define DMX_RELEASE_DATA _IO('o', 57)
+#define DMX_FEED_DATA _IO('o', 58)
+#define DMX_SET_PLAYBACK_MODE _IOW('o', 59, enum dmx_playback_mode_t)
#endif /*_DVBDMX_H_*/