Parse 'cslg' atom to retrieve dts shift when 'ctts' duration is negative.

[frescor/ffmpeg.git] / libavformat / isom.h

diff --git a/libavformat/isom.h b/libavformat/isom.h
index 90a4ed0a373b39489770c3238a101a178604b254..5b18f1ee98a230be2cb0565aa33d6598cacf8d99 100644 (file)
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -1,15 +1,139 @@
-#ifndef FFMPEG_ISOM_H
-#define FFMPEG_ISOM_H
+/*
+ * ISO Media common code
+ * copyright (c) 2001 Fabrice Bellard
+ * copyright (c) 2002 Francois Revol <revol@free.fr>
+ * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
+ *
+ * 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
+ */
+
+#ifndef AVFORMAT_ISOM_H
+#define AVFORMAT_ISOM_H
+
+#include "avio.h"
+#include "riff.h"
+#include "dv.h"
 
 /* isom.c */
-extern const CodecTag ff_mov_obj_type[];
+extern const AVCodecTag ff_mp4_obj_type[];
+extern const AVCodecTag codec_movvideo_tags[];
+extern const AVCodecTag codec_movaudio_tags[];
+extern const AVCodecTag ff_codec_movsubtitle_tags[];
 
 int ff_mov_iso639_to_lang(const char *lang, int mp4);
-int ff_mov_lang_to_iso639(int code, char *to);
+int ff_mov_lang_to_iso639(unsigned code, char *to);
+
+/* the QuickTime file format is quite convoluted...
+ * it has lots of index tables, each indexing something in another one...
+ * Here we just use what is needed to read the chunks
+ */
 
-typedef struct Time2Sample{
+typedef struct {
     int count;
     int duration;
-}Time2Sample;
+} MOVStts;
+
+typedef struct {
+    int first;
+    int count;
+    int id;
+} MOVStsc;
+
+typedef struct {
+    uint32_t type;
+    char *path;
+} MOVDref;
+
+typedef struct {
+    uint32_t type;
+    int64_t offset;
+    int64_t size; /* total size (excluding the size and type fields) */
+} MOVAtom;
+
+struct MOVParseTableEntry;
+
+typedef struct {
+    unsigned track_id;
+    uint64_t base_data_offset;
+    uint64_t moof_offset;
+    unsigned stsd_id;
+    unsigned duration;
+    unsigned size;
+    unsigned flags;
+} MOVFragment;
+
+typedef struct {
+    unsigned track_id;
+    unsigned stsd_id;
+    unsigned duration;
+    unsigned size;
+    unsigned flags;
+} MOVTrackExt;
+
+typedef struct MOVStreamContext {
+    ByteIOContext *pb;
+    int ffindex; /* the ffmpeg stream id */
+    int next_chunk;
+    unsigned int chunk_count;
+    int64_t *chunk_offsets;
+    unsigned int stts_count;
+    MOVStts *stts_data;
+    unsigned int ctts_count;
+    MOVStts *ctts_data;
+    unsigned int stsc_count;
+    MOVStsc *stsc_data;
+    int ctts_index;
+    int ctts_sample;
+    unsigned int sample_size;
+    unsigned int sample_count;
+    int *sample_sizes;
+    unsigned int keyframe_count;
+    int *keyframes;
+    int time_scale;
+    int time_rate;
+    int time_offset; ///< time offset of the first edit list entry
+    int current_sample;
+    unsigned int bytes_per_frame;
+    unsigned int samples_per_frame;
+    int dv_audio_container;
+    int pseudo_stream_id; ///< -1 means demux all ids
+    int16_t audio_cid; ///< stsd audio compression id
+    unsigned drefs_count;
+    MOVDref *drefs;
+    int dref_id;
+    int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
+    int width;  ///< tkhd width
+    int height; ///< tkhd height
+    int dts_shift; ///< dts shift when ctts is negative
+} MOVStreamContext;
+
+typedef struct MOVContext {
+    AVFormatContext *fc;
+    int time_scale;
+    int64_t duration; /* duration of the longest track */
+    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
+    int found_mdat; /* we suppose we have enough data to read the file */
+    DVDemuxContext *dv_demux;
+    AVFormatContext *dv_fctx;
+    int isom; /* 1 if file is ISO Media (mp4/3gp) */
+    MOVFragment fragment; ///< current fragment in moof atom
+    MOVTrackExt *trex_data;
+    unsigned trex_count;
+    int itunes_metadata; ///< metadata are itunes style
+} MOVContext;
 
-#endif /* FFMPEG_ISOM_H */
+#endif /* AVFORMAT_ISOM_H */