mpeg/psi: Add support for descriptor 0x0d (Copyright descriptor).

mpeg/psi/desc_0d.h

+/*****************************************************************************
+ * desc_0d.h: ISO/IEC 13818-1 Descriptor 0x0d (Copyright descriptor)
+ *****************************************************************************
+ * Copyright (C) 2011 Unix Solutions Ltd.
+ *
+ * Authors: Georgi Chorbadzhiyski <georgi@unixsol.org>
+ *
+ * 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:
+ *  - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems)
+ */
+
+#ifndef __BITSTREAM_MPEG_DESC_0D_H__
+#define __BITSTREAM_MPEG_DESC_0D_H__
+
+#include <bitstream/common.h>
+#include <bitstream/mpeg/psi/descriptors.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * Descriptor 0x0d: Copyright descriptor
+ *****************************************************************************/
+#define DESC0D_HEADER_SIZE      (DESC_HEADER_SIZE + 4)
+
+static inline void desc0d_init(uint8_t *p_desc)
+{
+    desc_set_tag(p_desc, 0x0d);
+    desc_set_length(p_desc, DESC0D_HEADER_SIZE - DESC_HEADER_SIZE);
+}
+
+static inline uint32_t desc0d_get_copyright_identifier(const uint8_t *p_desc)
+{
+    return (p_desc[2] << 24) | (p_desc[3] << 16) | (p_desc[4] << 8) | p_desc[5];
+}
+
+static inline void desc0d_set_copyright_identifier(uint8_t *p_desc, uint32_t i_copyright_identifier)
+{
+    p_desc[2] = (i_copyright_identifier >> 24) & 0xff;
+    p_desc[3] = (i_copyright_identifier >> 16) & 0xff;
+    p_desc[4] = (i_copyright_identifier >>  8) & 0xff;
+    p_desc[5] =  i_copyright_identifier        & 0xff;
+}
+
+static inline const uint8_t *desc0d_get_additional_copyright_info(const uint8_t *p_desc, uint8_t *i_length)
+{
+    *i_length = desc_get_length(p_desc) - (DESC0D_HEADER_SIZE - DESC_HEADER_SIZE);
+    if (*i_length)
+        return &p_desc[DESC0D_HEADER_SIZE];
+    return NULL;
+}
+
+static inline void desc0d_set_additional_copyright_info(uint8_t *p_desc, uint8_t *p_additional_copyright_info, uint8_t i_length)
+{
+    if (i_length == 0 || !p_additional_copyright_info)
+        desc_set_length(p_desc, DESC0D_HEADER_SIZE - DESC_HEADER_SIZE);
+    else if (i_length < 252)
+    {
+        desc_set_length(p_desc, (DESC0D_HEADER_SIZE - DESC_HEADER_SIZE) + i_length);
+        memcpy(p_desc + DESC0D_HEADER_SIZE, p_additional_copyright_info, i_length);
+    }
+}
+
+static inline bool desc0d_validate(const uint8_t *p_desc)
+{
+    return desc_get_length(p_desc) >= DESC0D_HEADER_SIZE - DESC_HEADER_SIZE;
+}
+
+static inline void desc0d_print(const uint8_t *p_desc, f_print pf_print,
+                                void *opaque, print_type_t i_print_type)
+{
+    uint8_t i, i_length;
+    const uint8_t *p_add_copy_info = desc0d_get_additional_copyright_info(p_desc, &i_length);
+    char psz_value[2 * 255 + 1];
+
+    for (i = 0; i < i_length; i++)
+        sprintf(psz_value + 2 * i, "%2.2hhx", p_add_copy_info[i]);
+    psz_value[2 * i] = '\0';
+
+    switch (i_print_type) {
+    case PRINT_XML:
+        pf_print(opaque, "<COPYRIGHT_DESC identifier=\"0x%08x\" additional_info_len=\"%u\" additional_info=\"%s\"/>",
+                 desc0d_get_copyright_identifier(p_desc),
+                 i_length, psz_value);
+        break;
+    default:
+        pf_print(opaque, "    - desc 0d copyright identifier=0x%08x additional_info_len=%u additional_info=%s",
+                 desc0d_get_copyright_identifier(p_desc),
+                 i_length, psz_value);
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

mpeg/psi/descs_list.h

@@ -45,5 +45,6 @@
 #include <bitstream/mpeg/psi/desc_0a.h>
 #include <bitstream/mpeg/psi/desc_0b.h>
 #include <bitstream/mpeg/psi/desc_0c.h>
+#include <bitstream/mpeg/psi/desc_0d.h>
 
 #endif

mpeg/psi/descs_print.h

@@ -111,6 +111,7 @@ static inline void descl_print(uint8_t *p_descl, uint16_t i_length,
         CASE_DESC(0a)
         CASE_DESC(0b)
         CASE_DESC(0c)
+        CASE_DESC(0d)
         CASE_DESC_ICONV(40)
         CASE_DESC(41)
         CASE_DESC(43)