diff options
Diffstat (limited to 'faad2/src/plugins/QCDMp4/aac2mp4.cpp')
| -rw-r--r-- | faad2/src/plugins/QCDMp4/aac2mp4.cpp | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/faad2/src/plugins/QCDMp4/aac2mp4.cpp b/faad2/src/plugins/QCDMp4/aac2mp4.cpp new file mode 100644 index 0000000..8dd0811 --- /dev/null +++ b/faad2/src/plugins/QCDMp4/aac2mp4.cpp @@ -0,0 +1,319 @@ +/*
+** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
+** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+**
+** Any non-GPL usage of this software or parts of this software is strictly
+** forbidden.
+**
+** Commercial non-GPL licensing of this software is possible.
+** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
+**
+** $Id: aac2mp4.cpp,v 1.3 2003/12/06 04:24:17 rjamorim Exp $
+**/
+
+#include <mpeg4ip.h>
+#include <mp4.h>
+#include <mp4av.h>
+
+#include "aac2mp4.h"
+
+int covert_aac_to_mp4(char *inputFileName, char *mp4FileName)
+{
+ int Mp4TimeScale = 90000;
+ int allMpeg4Streams = 0;
+ MP4FileHandle mp4File;
+ FILE* inFile;
+ const char *type;
+ MP4TrackId createdTrackId = MP4_INVALID_TRACK_ID;
+
+ mp4File = MP4Create(mp4FileName, 0, 0, 0);
+ if (mp4File)
+ {
+ MP4SetTimeScale(mp4File, Mp4TimeScale);
+ } else {
+ return 1;
+ }
+
+ inFile = fopen(inputFileName, "rb");
+
+ if (inFile == NULL)
+ {
+ MP4Close(mp4File);
+ return 2;
+ }
+
+ createdTrackId = AacCreator(mp4File, inFile);
+
+ if (createdTrackId == MP4_INVALID_TRACK_ID)
+ {
+ fclose(inFile);
+ MP4Close(mp4File);
+ return 3;
+ }
+
+ type = MP4GetTrackType(mp4File, createdTrackId);
+
+ if (!strcmp(type, MP4_AUDIO_TRACK_TYPE))
+ {
+ allMpeg4Streams &=
+ (MP4GetTrackAudioType(mp4File, createdTrackId)
+ == MP4_MPEG4_AUDIO_TYPE);
+ }
+
+ if (inFile)
+ {
+ fclose(inFile);
+ }
+
+ MP4Close(mp4File);
+ MP4MakeIsmaCompliant(mp4FileName, 0, allMpeg4Streams);
+
+ return 0;
+}
+
+#define ADTS_HEADER_MAX_SIZE 10 /* bytes */
+
+static u_int8_t firstHeader[ADTS_HEADER_MAX_SIZE];
+
+/*
+ * hdr must point to at least ADTS_HEADER_MAX_SIZE bytes of memory
+ */
+static bool LoadNextAdtsHeader(FILE* inFile, u_int8_t* hdr)
+{
+ u_int state = 0;
+ u_int dropped = 0;
+ u_int hdrByteSize = ADTS_HEADER_MAX_SIZE;
+
+ while (1) {
+ /* read a byte */
+ u_int8_t b;
+
+ if (fread(&b, 1, 1, inFile) == 0) {
+ return false;
+ }
+
+ /* header is complete, return it */
+ if (state == hdrByteSize - 1) {
+ hdr[state] = b;
+ if (dropped > 0) {
+ fprintf(stderr, "Warning: dropped %u input bytes\n", dropped);
+ }
+ return true;
+ }
+
+ /* collect requisite number of bytes, no constraints on data */
+ if (state >= 2) {
+ hdr[state++] = b;
+ } else {
+ /* have first byte, check if we have 1111X00X */
+ if (state == 1) {
+ if ((b & 0xF6) == 0xF0) {
+ hdr[state] = b;
+ state = 2;
+ /* compute desired header size */
+ hdrByteSize = MP4AV_AdtsGetHeaderByteSize(hdr);
+ } else {
+ state = 0;
+ }
+ }
+ /* initial state, looking for 11111111 */
+ if (state == 0) {
+ if (b == 0xFF) {
+ hdr[state] = b;
+ state = 1;
+ } else {
+ /* else drop it */
+ dropped++;
+ }
+ }
+ }
+ }
+}
+
+/*
+ * Load the next frame from the file
+ * into the supplied buffer, which better be large enough!
+ *
+ * Note: Frames are padded to byte boundaries
+ */
+static bool LoadNextAacFrame(FILE* inFile, u_int8_t* pBuf, u_int32_t* pBufSize, bool stripAdts)
+{
+ u_int16_t frameSize;
+ u_int16_t hdrBitSize, hdrByteSize;
+ u_int8_t hdrBuf[ADTS_HEADER_MAX_SIZE];
+
+ /* get the next AAC frame header, more or less */
+ if (!LoadNextAdtsHeader(inFile, hdrBuf)) {
+ return false;
+ }
+
+ /* get frame size from header */
+ frameSize = MP4AV_AdtsGetFrameSize(hdrBuf);
+
+ /* get header size in bits and bytes from header */
+ hdrBitSize = MP4AV_AdtsGetHeaderBitSize(hdrBuf);
+ hdrByteSize = MP4AV_AdtsGetHeaderByteSize(hdrBuf);
+
+ /* adjust the frame size to what remains to be read */
+ frameSize -= hdrByteSize;
+
+ if (stripAdts) {
+ if ((hdrBitSize % 8) == 0) {
+ /* header is byte aligned, i.e. MPEG-2 ADTS */
+ /* read the frame data into the buffer */
+ if (fread(pBuf, 1, frameSize, inFile) != frameSize) {
+ return false;
+ }
+ (*pBufSize) = frameSize;
+ } else {
+ /* header is not byte aligned, i.e. MPEG-4 ADTS */
+ int i;
+ u_int8_t newByte;
+ int upShift = hdrBitSize % 8;
+ int downShift = 8 - upShift;
+
+ pBuf[0] = hdrBuf[hdrBitSize / 8] << upShift;
+
+ for (i = 0; i < frameSize; i++) {
+ if (fread(&newByte, 1, 1, inFile) != 1) {
+ return false;
+ }
+ pBuf[i] |= (newByte >> downShift);
+ pBuf[i+1] = (newByte << upShift);
+ }
+ (*pBufSize) = frameSize + 1;
+ }
+ } else { /* don't strip ADTS headers */
+ memcpy(pBuf, hdrBuf, hdrByteSize);
+ if (fread(&pBuf[hdrByteSize], 1, frameSize, inFile) != frameSize) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static bool GetFirstHeader(FILE* inFile)
+{
+ /* read file until we find an audio frame */
+ fpos_t curPos;
+
+ /* already read first header */
+ if (firstHeader[0] == 0xff) {
+ return true;
+ }
+
+ /* remember where we are */
+ fgetpos(inFile, &curPos);
+
+ /* go back to start of file */
+ rewind(inFile);
+
+ if (!LoadNextAdtsHeader(inFile, firstHeader)) {
+ return false;
+ }
+
+ /* reposition the file to where we were */
+ fsetpos(inFile, &curPos);
+
+ return true;
+}
+
+MP4TrackId AacCreator(MP4FileHandle mp4File, FILE* inFile)
+{
+ // collect all the necessary meta information
+ u_int32_t samplesPerSecond;
+ u_int8_t mpegVersion;
+ u_int8_t profile;
+ u_int8_t channelConfig;
+
+ if (!GetFirstHeader(inFile)) {
+ return MP4_INVALID_TRACK_ID;
+ }
+
+ samplesPerSecond = MP4AV_AdtsGetSamplingRate(firstHeader);
+ mpegVersion = MP4AV_AdtsGetVersion(firstHeader);
+ profile = MP4AV_AdtsGetProfile(firstHeader);
+ channelConfig = MP4AV_AdtsGetChannels(firstHeader);
+
+ u_int8_t audioType = MP4_INVALID_AUDIO_TYPE;
+ switch (mpegVersion) {
+ case 0:
+ audioType = MP4_MPEG4_AUDIO_TYPE;
+ break;
+ case 1:
+ switch (profile) {
+ case 0:
+ audioType = MP4_MPEG2_AAC_MAIN_AUDIO_TYPE;
+ break;
+ case 1:
+ audioType = MP4_MPEG2_AAC_LC_AUDIO_TYPE;
+ break;
+ case 2:
+ audioType = MP4_MPEG2_AAC_SSR_AUDIO_TYPE;
+ break;
+ case 3:
+ return MP4_INVALID_TRACK_ID;
+ }
+ break;
+ }
+
+ // add the new audio track
+ MP4TrackId trackId =
+ MP4AddAudioTrack(mp4File,
+ samplesPerSecond, 1024, audioType);
+
+ if (trackId == MP4_INVALID_TRACK_ID) {
+ return MP4_INVALID_TRACK_ID;
+ }
+
+ if (MP4GetNumberOfTracks(mp4File, MP4_AUDIO_TRACK_TYPE) == 1) {
+ MP4SetAudioProfileLevel(mp4File, 0x0F);
+ }
+
+ u_int8_t* pConfig = NULL;
+ u_int32_t configLength = 0;
+
+ MP4AV_AacGetConfiguration(
+ &pConfig,
+ &configLength,
+ profile,
+ samplesPerSecond,
+ channelConfig);
+
+ if (!MP4SetTrackESConfiguration(mp4File, trackId,
+ pConfig, configLength)) {
+ MP4DeleteTrack(mp4File, trackId);
+ return MP4_INVALID_TRACK_ID;
+ }
+
+ // parse the ADTS frames, and write the MP4 samples
+ u_int8_t sampleBuffer[8 * 1024];
+ u_int32_t sampleSize = sizeof(sampleBuffer);
+ MP4SampleId sampleId = 1;
+
+ while (LoadNextAacFrame(inFile, sampleBuffer, &sampleSize, true)) {
+ if (!MP4WriteSample(mp4File, trackId, sampleBuffer, sampleSize)) {
+ MP4DeleteTrack(mp4File, trackId);
+ return MP4_INVALID_TRACK_ID;
+ }
+ sampleId++;
+ sampleSize = sizeof(sampleBuffer);
+ }
+
+ return trackId;
+}
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