MP4 support v2 (undebugged). This replaces callouts to faad with use of libfaad (aka neaacdec) and loads all components dynamically, much like existing MP1/2/3 support.

2026-01-13 08:05:55 +01:00 · 2014-12-21 20:13:58 +00:00
parent aae6763f4f
commit f63b14cca9
8 changed files with 388 additions and 104 deletions
--- a/lib/rdmp4.h
+++ b/lib/rdmp4.h
@@ -0,0 +1,95 @@
+//   rdmp4.h
+//
+//   Helpers for dealing with MP4 files.
+//
+//   (C) Copyright 2014 Christopher Smowton <chris@smowton.net>
+//
+//   This program is free software; you can redistribute it and/or modify
+//   it under the terms of the GNU Library General Public License 
+//   version 2 as published by the Free Software Foundation.
+//
+//   This program 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 General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public
+//   License along with this program; if not, write to the Free Software
+//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+//
+
+#ifndef RDMP4_H
+#define RDMP4_H
+#ifdef HAVE_MP4_LIBS
+
+#include <mp4v2/mp4v2.h>
+#include <neaacdec.h>
+
+struct DLMP4 {
+
+DLMP4() : loadSuccess(false) {}
+
+  void *conv_neaac_handle;
+  void *conv_mp4_handle;
+  bool loadSuccess;
+
+  // MP4v2 Functions
+  MP4FileHandle (*MP4Read) (const char* fileName);
+  MP4SampleId (*MP4GetTrackNumberOfSamples) (MP4FileHandle hFile, MP4TrackId trackId);
+  MP4SampleId (*MP4GetSampleIdFromTime) (MP4FileHandle hFile, MP4TrackId trackId, MP4Timestamp when, bool wantSyncSample);
+  uint32_t (*MP4GetTrackMaxSampleSize) (MP4FileHandle hFile, MP4TrackId trackId);
+  bool (*MP4GetTrackESConfiguration) (MP4FileHandle hFile, MP4TrackId trackId, uint8_t** ppConfig, uint32_t* pConfigSize);
+  bool (*MP4ReadSample) (
+    MP4FileHandle hFile,
+    MP4TrackId    trackId,
+    MP4SampleId   sampleId,
+    uint8_t** ppBytes,
+    uint32_t* pNumBytes,
+    MP4Timestamp* pStartTime,
+    MP4Duration*  pDuration,
+    MP4Duration*  pRenderingOffset,
+    bool*         pIsSyncSample);
+  uint32_t (*MP4GetTrackBitRate) (MP4FileHandle hFile, MP4TrackId trackId);
+  int (*MP4GetTrackAudioChannels) (MP4FileHandle hFile, MP4TrackId trackId);
+  MP4Duration (*MP4GetTrackDuration) (MP4FileHandle hFile, MP4TrackId trackId);
+  uint64_t (*MP4ConvertFromTrackDuration) (
+    MP4FileHandle hFile,
+    MP4TrackId    trackId,
+    MP4Duration   duration,
+    uint32_t      timeScale);
+  uint32_t (*MP4GetTrackTimeScale) (MP4FileHandle hFile, MP4TrackId trackId);
+  uint32_t (*MP4GetNumberOfTracks) (MP4FileHandle hFile);
+  MP4TrackId (*MP4FindTrackId) (MP4FileHandle hFile, uint32_t trackIdx);
+  const char* (*MP4GetTrackType) (MP4FileHandle hFile, MP4TrackId);
+  const char* (*MP4GetTrackMediaDataName) (MP4FileHandle hFile, MP4TrackId);
+  uint8_t (*MP4GetTrackEsdsObjectTypeId) (MP4FileHandle hFile, MP4TrackId);
+  const MP4Tags* (*MP4TagsAlloc) (void);
+  bool (*MP4TagsFetch) (const MP4Tags* tags, MP4FileHandle hFile);
+  void (*MP4TagsFree) (const MP4Tags* tags);
+  void (*MP4Close) (MP4FileHandle hFile, uint32_t flags);
+
+  // libfaad / NeAACDec functions
+  NeAACDecHandle (*NeAACDecOpen) (void);
+  NeAACDecConfigurationPtr (*NeAACDecGetCurrentConfiguration) (NeAACDecHandle hDecoder);
+  unsigned char (*NeAACDecSetConfiguration) (NeAACDecHandle hDecoder, NeAACDecConfigurationPtr config);
+  char (*NeAACDecInit2)(NeAACDecHandle hDecoder,
+			unsigned char *pBuffer,
+			unsigned long SizeOfDecoderSpecificInfo,
+			unsigned long *samplerate,
+			unsigned char *channels);
+  void* (*NeAACDecDecode) (NeAACDecHandle hDecoder,
+			   NeAACDecFrameInfo *hInfo,
+			   unsigned char *buffer,
+			   unsigned long buffer_size);
+  void (*NeAACDecClose) (NeAACDecHandle hDecoder);
+
+  // Helper functions:
+  MP4TrackId getMP4AACTrack(MP4FileHandle f);
+
+  bool load();
+
+};
+
+#endif // HAVE_MP4_LIBS
+#endif // RDMP4_H