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authorLinus Torvalds <torvalds@linux-foundation.org>2020-10-13 09:37:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-13 09:37:02 -0700
commitfd5c32d80884268a381ed0e67cccef0b3d37750b (patch)
treee5f8844e8c5aa5a7f7dec265d765d3b31cca8be5 /drivers/media/test-drivers/vidtv/vidtv_ts.h
parent647412daeb454b6dad12a6c6961ab90aac9e5d29 (diff)
parentc386e0797d26a32e354daf4480c5d40165db66a1 (diff)
Merge tag 'media/v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab: - the usbvision driver was dropped from staging - the Zoran driver were re-added at staging. It gained lots of improvements, and was converted to use videobuf2 API - a new virtual driver (vidtv) was added in order to allow testing the digital TV framework and APIs - the media uAPI documentation gained a glossary with commonly used terms, helping to simplify some parts of the docs - more cleanups at the atomisp driver - Mediatek VPU gained support for MT8183 - added support for codecs with supports doing colorspace conversion (CSC) - support for CSC API was added at vivid and rksip1 drivers - added a helper core support and uAPI for better supporting H.264 codecs - added support for Renesas R8A774E1 - use the new SPDX GFDL-1.1-no-invariants-or-later license on media uAPI docs, instead of a license text - Venus driver has gained VP9 codec support - lots of other cleanups and driver improvements * tag 'media/v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (555 commits) media: dvb-frontends/drxk_hard.c: fix uninitialized variable warning media: tvp7002: fix uninitialized variable warning media: s5k5baf: drop 'data' field in struct s5k5baf_fw media: dt-bindings: media: venus: Add an optional power domain for perf voting media: rcar-vin: rcar-dma: Fix setting VNIS_REG for RAW8 formats media: staging: rkisp1: uapi: Do not use BIT() macro media: v4l2-mem2mem: Fix spurious v4l2_m2m_buf_done media: usbtv: Fix refcounting mixup media: zoran.rst: place it at the right place this time media: add Zoran cardlist media: admin-guide: update cardlists media: siano: rename a duplicated card string media: zoran: move documentation file to the right place media: atomisp: fixes build breakage for ISP2400 due to a cleanup media: zoran: fix mixed case on vars media: zoran: get rid of an unused var media: zoran: use upper case for card types media: zoran: fix sparse warnings media: zoran: fix smatch warning media: zoran: update TODO ...
Diffstat (limited to 'drivers/media/test-drivers/vidtv/vidtv_ts.h')
-rw-r--r--drivers/media/test-drivers/vidtv/vidtv_ts.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/media/test-drivers/vidtv/vidtv_ts.h b/drivers/media/test-drivers/vidtv/vidtv_ts.h
new file mode 100644
index 000000000000..83dcc9183b45
--- /dev/null
+++ b/drivers/media/test-drivers/vidtv/vidtv_ts.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * The Virtual DVB test driver serves as a reference DVB driver and helps
+ * validate the existing APIs in the media subsystem. It can also aid
+ * developers working on userspace applications.
+ *
+ * Copyright (C) 2020 Daniel W. S. Almeida
+ */
+
+#ifndef VIDTV_TS_H
+#define VIDTV_TS_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#define TS_SYNC_BYTE 0x47
+#define TS_PACKET_LEN 188
+#define TS_PAYLOAD_LEN 184
+#define TS_NULL_PACKET_PID 0x1fff
+#define TS_CC_MAX_VAL 0x0f /* 4 bits */
+#define TS_LAST_VALID_PID 8191
+#define TS_FILL_BYTE 0xff /* the byte used in packet stuffing */
+
+struct vidtv_mpeg_ts_adaption {
+ u8 length;
+ struct {
+ u8 extension:1;
+ u8 private_data:1;
+ u8 splicing_point:1;
+ u8 OPCR:1;
+ u8 PCR:1;
+ u8 priority:1;
+ u8 random_access:1;
+ u8 discontinued:1;
+ } __packed;
+ u8 data[];
+} __packed;
+
+struct vidtv_mpeg_ts {
+ u8 sync_byte;
+ __be16 bitfield; /* tei: 1, payload_start:1 priority: 1, pid:13 */
+ struct {
+ u8 continuity_counter:4;
+ u8 payload:1;
+ u8 adaptation_field:1;
+ u8 scrambling:2;
+ } __packed;
+ struct vidtv_mpeg_ts_adaption adaption[];
+} __packed;
+
+/**
+ * struct pcr_write_args - Arguments for the pcr_write_into function.
+ * @dest_buf: The buffer to write into.
+ * @dest_offset: The byte offset into the buffer.
+ * @pid: The TS PID for the PCR packets.
+ * @buf_sz: The size of the buffer in bytes.
+ * @countinuity_counter: The TS continuity_counter.
+ * @pcr: A sample from the system clock.
+ */
+struct pcr_write_args {
+ void *dest_buf;
+ u32 dest_offset;
+ u16 pid;
+ u32 buf_sz;
+ u8 *continuity_counter;
+ u64 pcr;
+};
+
+/**
+ * struct null_packet_write_args - Arguments for the null_write_into function
+ * @dest_buf: The buffer to write into.
+ * @dest_offset: The byte offset into the buffer.
+ * @buf_sz: The size of the buffer in bytes.
+ * @countinuity_counter: The TS continuity_counter.
+ */
+struct null_packet_write_args {
+ void *dest_buf;
+ u32 dest_offset;
+ u32 buf_sz;
+ u8 *continuity_counter;
+};
+
+/* Increment the continuity counter */
+void vidtv_ts_inc_cc(u8 *continuity_counter);
+
+/**
+ * vidtv_ts_null_write_into - Write a TS null packet into a buffer.
+ * @args: the arguments to use when writing.
+ *
+ * This function will write a null packet into a buffer. This is usually used to
+ * pad TS streams.
+ *
+ * Return: The number of bytes written into the buffer.
+ */
+u32 vidtv_ts_null_write_into(struct null_packet_write_args args);
+
+/**
+ * vidtv_ts_pcr_write_into - Write a PCR packet into a buffer.
+ * @args: the arguments to use when writing.
+ *
+ * This function will write a PCR packet into a buffer. This is used to
+ * synchronize the clocks between encoders and decoders.
+ *
+ * Return: The number of bytes written into the buffer.
+ */
+u32 vidtv_ts_pcr_write_into(struct pcr_write_args args);
+
+#endif //VIDTV_TS_H