SMPTE 337 support

smpte/337.h

@@ -0,0 +1,145 @@
+/*****************************************************************************
+ * 337.h: SMPTE 337 Non-PCM data in AES3
+ *****************************************************************************
+ * Copyright (C) 2016 OpenHeadend
+ *
+ * Authors: Christophe Massiot <cmassiot@openheadend.tv>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *****************************************************************************/
+
+/*
+ * Normative references:
+ *  - SMPTE 337
+ *  - SMPTE 338
+ */
+
+#ifndef __BITSTREAM_SMPTE_337_H__
+#define __BITSTREAM_SMPTE_337_H__
+
+#include <stdint.h>   /* uint8_t, uint16_t, etc... */
+#include <stdbool.h>  /* bool */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * SMPTE 337 burst preamble (16-bit mode only)
+ *****************************************************************************/
+#define S337_PREAMBLE_SIZE          8
+#define S337_PREAMBLE_A1            0xf8
+#define S337_PREAMBLE_A2            0x72
+#define S337_PREAMBLE_B1            0x4e
+#define S337_PREAMBLE_B2            0x1f
+
+#define S337_TYPE_NULL              0
+#define S337_TYPE_A52               1
+#define S337_TYPE_TIMESTAMP         2
+#define S337_TYPE_PAUSE             3
+#define S337_TYPE_A52E              16
+#define S337_TYPE_VSYNC             26
+#define S337_TYPE_CAPTION           29
+#define S337_TYPE_USER              30
+
+#define S337_MODE_16                0
+#define S337_MODE_20                1
+#define S337_MODE_24                2
+#define S337_MODE_RESERVED          3
+
+#define S337_TYPE_A52_REP_RATE_FLAG 0x08
+#define S337_TYPE_A52_NOT_FULL_SVC  0x10
+
+static inline void s337_set_data_type(uint8_t *p_s337, uint8_t i_data_type)
+{
+    p_s337[5] &= ~0x1f;
+    p_s337[5] |= i_data_type & 0x1f;
+}
+
+static inline uint8_t s337_get_data_type(const uint8_t *p_s337)
+{
+    return p_s337[5] & 0x1f;
+}
+
+static inline void s337_set_data_mode(uint8_t *p_s337, uint8_t i_data_mode)
+{
+    p_s337[5] &= ~0x60;
+    p_s337[5] |= (i_data_mode << 5) & 0x60;
+}
+
+static inline uint8_t s337_get_data_mode(const uint8_t *p_s337)
+{
+    return (p_s337[5] & 0x60) >> 5;
+}
+
+static inline void s337_set_error(uint8_t *p_s337)
+{
+    p_s337[5] |= 0x80;
+}
+
+static inline void s337_clear_error(uint8_t *p_s337)
+{
+    p_s337[5] &= ~0x80;
+}
+
+static inline bool s337_get_error(const uint8_t *p_s337)
+{
+    return p_s337[5] & 0x80;
+}
+
+static inline void s337_set_data_type_dep(uint8_t *p_s337, uint8_t i_data_type_dep)
+{
+    p_s337[4] &= ~0x1f;
+    p_s337[4] |= i_data_type_dep & 0x1f;
+}
+
+static inline uint8_t s337_get_data_type_dep(const uint8_t *p_s337)
+{
+    return p_s337[4] & 0x1f;
+}
+
+static inline void s337_set_data_stream(uint8_t *p_s337, uint8_t i_data_stream)
+{
+    p_s337[4] &= ~0xe0;
+    p_s337[4] |= (i_data_stream << 5) & 0xe0;
+}
+
+static inline uint8_t s337_get_data_stream(const uint8_t *p_s337)
+{
+    return (p_s337[4] & 0xe0) >> 5;
+}
+
+static inline void s337_set_length(uint8_t *p_s337, uint16_t i_length)
+{
+    p_s337[6] = i_length >> 8;
+    p_s337[7] = i_length & 0xff;
+}
+
+static inline uint16_t s337_get_length(const uint8_t *p_s337)
+{
+    return (p_s337[6] << 8) | p_s337[7];
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif