v4l-mfc-example: version 0.1

1 files changed, 90 insertions, 0 deletions

diff --git a/v4l2-mfc-example/parser.h b/v4l2-mfc-example/parser.h
new file mode 100644
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+++ b/v4l2-mfc-example/parser.h
@@ -0,0 +1,90 @@
+/*
+ * V4L2 Codec decoding example application
+ * Kamil Debski <k.debski@samsung.com>
+ *
+ * Really simple stream parser header file
+ *
+ * Copyright 2012 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef INCLUDE_PARSER_H
+#define INCLUDE_PARSER_H
+
+/* H264 parser states */
+enum mfc_h264_parser_state {
+	H264_PARSER_NO_CODE,
+	H264_PARSER_CODE_0x1,
+	H264_PARSER_CODE_0x2,
+	H264_PARSER_CODE_0x3,
+	H264_PARSER_CODE_1x1,
+	H264_PARSER_CODE_SLICE,
+};
+
+/* H264 recent tag type */
+enum mfc_h264_tag_type {
+	H264_TAG_HEAD,
+	H264_TAG_SLICE,
+};
+
+/* MPEG4 parser states */
+enum mfc_mpeg4_parser_state {
+	MPEG4_PARSER_NO_CODE,
+	MPEG4_PARSER_CODE_0x1,
+	MPEG4_PARSER_CODE_0x2,
+	MPEG4_PARSER_CODE_1x1,
+};
+
+/* MPEG4 recent tag type */
+enum mfc_mpeg4_tag_type {
+	MPEG4_TAG_HEAD,
+	MPEG4_TAG_VOP,
+};
+
+/* Parser context */
+struct mfc_parser_context {
+	int state;
+	int last_tag;
+	char bytes[6];
+	int main_count;
+	int headers_count;
+	int tmp_code_start;
+	int code_start;
+	int code_end;
+	char got_start;
+	char got_end;
+	char seek_end;
+};
+
+/* Initialize the stream parser */
+int parse_stream_init(struct mfc_parser_context *ctx);
+
+/* Parser the stream:
+ * - consumed is used to return the number of bytes consumed from the output
+ * - frame_size is used to return the size of the frame that has been extracted
+ * - get_head - when equal to 1 it is used to extract the stream header wehn
+ *   setting up MFC
+ * Return value: 1 - if a complete frame has been extracted, 0 otherwise
+ */
+int parse_mpeg4_stream(struct mfc_parser_context *ctx,
+        char* in, int in_size, char* out, int out_size,
+        int *consumed, int *frame_size, char get_head);
+
+int parse_h264_stream(struct mfc_parser_context *ctx,
+        char* in, int in_size, char* out, int out_size,
+        int *consumed, int *frame_size, char get_head);
+
+#endif /* PARSER_H_ */
+