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authorDave Burke <daveburke@google.com>2012-04-17 09:51:45 -0700
committerDave Burke <daveburke@google.com>2012-04-17 23:04:43 -0700
commit9bf37cc9712506b2483650c82d3c41152337ef7e (patch)
tree77db44e2bae06e3d144b255628be2b7a55c581d3 /libMpegTPEnc/src/tpenc_latm.h
parenta37315fe10ee143d6d0b28c19d41a476a23e63ea (diff)
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Fraunhofer AAC codec.
License boilerplate update to follow. Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
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+/***************************** MPEG-4 AAC Encoder **************************
+
+ (C) Copyright Fraunhofer IIS (2001)
+ All Rights Reserved
+
+ Please be advised that this software and/or program delivery is
+ Confidential Information of Fraunhofer and subject to and covered by the
+
+ Fraunhofer IIS Software Evaluation Agreement
+ between Google Inc. and Fraunhofer
+ effective and in full force since March 1, 2012.
+
+ You may use this software and/or program only under the terms and
+ conditions described in the above mentioned Fraunhofer IIS Software
+ Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+ $Id$
+ Author(s):
+ Description:
+
+ This software and/or program is protected by copyright law and international
+ treaties. Any reproduction or distribution of this software and/or program,
+ or any portion of it, may result in severe civil and criminal penalties, and
+ will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#ifndef TPENC_LATM_H
+#define TPENC_LATM_H
+
+
+
+#include "tpenc_lib.h"
+#include "FDK_bitstream.h"
+
+
+#define DEFAULT_LATM_NR_OF_SUBFRAMES 1
+#define DEFAULT_LATM_SMC_REPEAT 8
+
+#define MAX_AAC_LAYERS 9
+
+#define LATM_MAX_PROGRAMS 1
+#define LATM_MAX_STREAM_ID 16
+
+#define LATM_MAX_LAYERS 1 /*MAX_AAC_LAYERS*/
+
+#define MAX_NR_OF_SUBFRAMES 2 /* set this carefully to avoid buffer overflows */
+
+typedef enum { LATMVAR_SIMPLE_SEQUENCE } LATM_VAR_MODE;
+
+typedef struct {
+ signed int frameLengthType;
+ signed int frameLengthBits;
+ signed int varFrameLengthTable[4];
+ signed int streamID;
+} LATM_LAYER_INFO;
+
+#define LATM_ASSEMBLEBUF_SIZE ((200+16)*8)
+#define LATM_SETUPBUF_SIZE (200*8)
+
+typedef struct {
+ LATM_LAYER_INFO m_linfo[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS];
+ CODER_CONFIG *config[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS];
+
+ LATM_VAR_MODE varMode;
+ TRANSPORT_TYPE tt;
+
+ int audioMuxLengthBytes;
+
+ int audioMuxLengthBytesPos;
+ int taraBufferFullness; /* state of the bit reservoir */
+ int varStreamCnt;
+ unsigned int otherDataLenBytes;
+
+ UCHAR latmFrameCounter; /* Current frame number. Counts modulo muxConfigPeriod */
+ UCHAR muxConfigPeriod; /* Distance in frames between MuxConfig */
+
+ UCHAR audioMuxVersion; /* AMV1 supports transmission of taraBufferFullness and ASC lengths */
+ UCHAR audioMuxVersionA; /* for future extensions */
+
+ UCHAR noProgram;
+ UCHAR noLayer[LATM_MAX_PROGRAMS];
+ UCHAR fractDelayPresent;
+
+ UCHAR allStreamsSameTimeFraming;
+ UCHAR subFrameCnt; /* Current Subframe frame */
+ UCHAR noSubframes; /* Number of subframes */
+ UINT latmSubframeStart; /* Position of current subframe start */
+ UCHAR noSubframes_next;
+
+ UCHAR fillBits; /* AudioMuxElement fill bits */
+ UCHAR streamMuxConfigBits;
+
+} LATM_STREAM;
+
+typedef LATM_STREAM *HANDLE_LATM_STREAM;
+
+/**
+ * \brief Initialize LATM_STREAM Handle. Creates automatically one program with one layer with
+ * the given layerConfig. The layerConfig must be persisten because references to this pointer
+ * are made at any time again.
+ * Use transportEnc_Latm_AddLayer() to add more programs/layers.
+ *
+ * \param hLatmStreamInfo HANDLE_LATM_STREAM handle
+ * \param hBs Bitstream handle
+ * \param layerConfig a valid CODER_CONFIG struct containing the current audio configuration parameters
+ * \param audioMuxVersion the LATM audioMuxVersion to be used
+ * \param tt the specific TRANSPORT_TYPE to be used, either TT_MP4_LOAS, TT_MP4_LATM_MCP1 or TT_MP4_LATM_MCP0 LOAS
+ * \param cb callback information structure.
+ *
+ * \return an TRANSPORTENC_ERROR error code
+ */
+TRANSPORTENC_ERROR transportEnc_Latm_Init(
+ HANDLE_LATM_STREAM hLatmStreamInfo,
+ HANDLE_FDK_BITSTREAM hBs,
+ CODER_CONFIG *layerConfig,
+ UINT audioMuxVersion,
+ TRANSPORT_TYPE tt,
+ CSTpCallBacks *cb
+ );
+
+/**
+ * \brief Get bit demand of next LATM/LOAS header
+ *
+ * \param hAss HANDLE_LATM_STREAM handle
+ * \param streamDataLength the length of the payload
+ *
+ * \return the number of bits required by the LATM/LOAS headers
+ */
+unsigned int transportEnc_LatmCountTotalBitDemandHeader (
+ HANDLE_LATM_STREAM hAss,
+ unsigned int streamDataLength
+ );
+
+/**
+ * \brief Write LATM/LOAS header into given bitstream handle
+ *
+ * \param hLatmStreamInfo HANDLE_LATM_STREAM handle
+ * \param hBitstream Bitstream handle
+ * \param auBits amount of current payload bits
+ * \param bufferFullness LATM buffer fullness value
+ * \param cb callback information structure.
+ *
+ * \return an TRANSPORTENC_ERROR error code
+ */
+TRANSPORTENC_ERROR
+transportEnc_LatmWrite (
+ HANDLE_LATM_STREAM hAss,
+ HANDLE_FDK_BITSTREAM hBitstream,
+ int auBits,
+ int bufferFullness,
+ CSTpCallBacks *cb
+ );
+
+/**
+ * \brief Adjust bit count relative to current subframe
+ *
+ * \param hAss HANDLE_LATM_STREAM handle
+ * \param pBits pointer to an int, where the current frame bit count is contained,
+ * and where the subframe relative bit count will be returned into
+ *
+ * \return void
+ */
+void transportEnc_LatmAdjustSubframeBits(HANDLE_LATM_STREAM hAss,
+ int *pBits);
+
+/**
+ * \brief Request an LATM frame, which may, or may not be available
+ *
+ * \param hAss HANDLE_LATM_STREAM handle
+ * \param hBs Bitstream handle
+ * \param pBytes pointer to an int, where the current frame byte count stored into.
+ * A return value of zero means that currently no LATM/LOAS frame can be returned.
+ * The latter is expected in case of multiple subframes being used.
+ *
+ * \return void
+ */
+void transportEnc_LatmGetFrame(
+ HANDLE_LATM_STREAM hAss,
+ HANDLE_FDK_BITSTREAM hBs,
+ int *pBytes
+ );
+
+/**
+ * \brief Write a StreamMuxConfig into the given bitstream handle
+ *
+ * \param hAss HANDLE_LATM_STREAM handle
+ * \param hBs Bitstream handle
+ * \param bufferFullness LATM buffer fullness value
+ * \param cb callback information structure.
+ *
+ * \return void
+ */
+TRANSPORTENC_ERROR
+CreateStreamMuxConfig(
+ HANDLE_LATM_STREAM hAss,
+ HANDLE_FDK_BITSTREAM hBs,
+ int bufferFullness,
+ CSTpCallBacks *cb
+ );
+
+
+#endif /* TPENC_LATM_H */