libdirac and libschro common code, patch from Anuradha Suraparaju anuradhaAtrdDoTbbcDoTcoDotuk

Originally committed as revision 12923 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 107 insertions, 0 deletions

diff --git a/libavcodec/diracschro_common.h b/libavcodec/diracschro_common.h
new file mode 100644
index 0000000000..e001827b90
--- /dev/null
+++ b/libavcodec/diracschro_common.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+* @file diracschro_common.h
+* data structures common to libdirac and libschroedinger
+*/
+
+#ifndef FFMPEG_DIRACSCHRO_COMMON_H
+#define FFMPEG_DIRACSCHRO_COMMON_H
+
+#include "avcodec.h"
+
+typedef struct
+{
+    uint16_t width;
+    uint16_t height;
+    uint16_t frame_rate_num;
+    uint16_t frame_rate_denom;
+} FfmpegDiracSchroVideoFormatInfo;
+
+/**
+* Returns the index into the Dirac Schro common video format info table
+*/
+unsigned int ff_dirac_schro_get_video_format_idx (AVCodecContext *avccontext);
+
+/**
+* contains a single encoded frame returned from Dirac or Schroedinger
+*/
+typedef struct FfmpegDiracSchroEncodedFrame
+{
+    /** encoded frame data */
+    uint8_t *p_encbuf;
+
+    /** encoded frame size */
+    uint32_t size;
+
+    /** encoded frame number. Will be used as pts */
+    uint32_t frame_num;
+
+    /** key frame flag. 1 : is key frame , 0 : in not key frame */
+    uint16_t key_frame;
+} FfmpegDiracSchroEncodedFrame;
+
+/**
+* queue element
+*/
+typedef struct FfmpegDiracSchroQueueElement
+{
+    /** Data to be stored in queue*/
+    void *data;
+    /** Pointer to next element queue */
+    struct FfmpegDiracSchroQueueElement *next;
+} FfmpegDiracSchroQueueElement;
+
+
+/**
+* A simple queue implementation used in libdirac and libschroedinger
+*/
+typedef struct FfmpegDiracSchroQueue
+{
+    /** Pointer to head of queue */
+    FfmpegDiracSchroQueueElement *p_head;
+    /** Pointer to tail of queue */
+    FfmpegDiracSchroQueueElement *p_tail;
+} FfmpegDiracSchroQueue;
+
+/**
+* Initialise the queue
+*/
+void ff_dirac_schro_queue_init(FfmpegDiracSchroQueue *queue);
+
+/**
+* Add an element to the end of the queue
+*/
+int ff_dirac_schro_queue_push_back (FfmpegDiracSchroQueue *queue, void *p_data);
+
+/**
+* Return the first element in the queue
+*/
+void *ff_dirac_schro_queue_pop (FfmpegDiracSchroQueue *queue);
+
+/**
+* Free the queue resources. free_func is a function supplied by the caller to
+* free any resources allocated by the caller. The data field of the queue
+* element is passed to it.
+*/
+void ff_dirac_schro_queue_free(FfmpegDiracSchroQueue *queue,
+                               void (*free_func)(void *));
+#endif /* FFMPEG_DIRACSCHRO_COMMON_H */