diff options
Diffstat (limited to 'faad2/src/aacDECdrop/decode.c')
| -rw-r--r-- | faad2/src/aacDECdrop/decode.c | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/faad2/src/aacDECdrop/decode.c b/faad2/src/aacDECdrop/decode.c new file mode 100644 index 0000000..8eca01c --- /dev/null +++ b/faad2/src/aacDECdrop/decode.c @@ -0,0 +1,566 @@ +/*
+** FAAD - Freeware Advanced Audio Decoder
+** Copyright (C) 2002 M. Bakker
+**
+** 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.
+**
+** $Id: decode.c,v 1.16 2004/04/03 19:08:37 menno Exp $
+** $Id: decode.c,v 1.16 2004/04/03 19:08:37 menno Exp $
+**/
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#define off_t __int64
+#else
+#include <time.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <neaacdec.h>
+#include <mp4ff.h>
+
+#include "audio.h"
+#include "decode.h"
+#include "misc.h"
+#include "wave_out.h"
+
+#ifndef min
+#define min(a,b) ( (a) < (b) ? (a) : (b) )
+#endif
+
+#define MAX_CHANNELS 8 /* make this higher to support files with
+ more channels */
+
+/* FAAD file buffering routines */
+/* declare buffering variables */
+#define DEC_BUFF_VARS \
+ int fileread, bytesconsumed, k; \
+ int buffercount = 0, buffer_index = 0; \
+ unsigned char *buffer; \
+ unsigned int bytes_in_buffer = 0;
+
+/* initialise buffering */
+#define INIT_BUFF(file) \
+ fseek(file, 0, SEEK_END); \
+ fileread = ftell(file); \
+ fseek(file, 0, SEEK_SET); \
+ buffer = (unsigned char*)malloc(FAAD_MIN_STREAMSIZE*MAX_CHANNELS); \
+ memset(buffer, 0, FAAD_MIN_STREAMSIZE*MAX_CHANNELS); \
+ bytes_in_buffer = fread(buffer, 1, FAAD_MIN_STREAMSIZE*MAX_CHANNELS, file);
+
+/* skip bytes in buffer */
+#define UPDATE_BUFF_SKIP(bytes) \
+ fseek(infile, bytes, SEEK_SET); \
+ buffer_index += bytes; \
+ buffercount = 0; \
+ bytes_in_buffer = fread(buffer, 1, FAAD_MIN_STREAMSIZE*MAX_CHANNELS, infile);
+
+/* update buffer */
+#define UPDATE_BUFF_READ \
+ if (bytesconsumed > 0) { \
+ for (k = 0; k < (FAAD_MIN_STREAMSIZE*MAX_CHANNELS - bytesconsumed); k++) \
+ buffer[k] = buffer[k + bytesconsumed]; \
+ bytes_in_buffer += fread(buffer + (FAAD_MIN_STREAMSIZE*MAX_CHANNELS) - bytesconsumed, 1, bytesconsumed, infile); \
+ bytesconsumed = 0; \
+ }
+
+/* update buffer indices after NeAACDecDecode */
+#define UPDATE_BUFF_IDX(frame) \
+ bytesconsumed += frame.bytesconsumed; \
+ buffer_index += frame.bytesconsumed; \
+ bytes_in_buffer -= frame.bytesconsumed;
+
+/* true if decoding has to stop because of EOF */
+#define IS_FILE_END buffer_index >= fileread
+
+/* end buffering */
+#define END_BUFF if (buffer) free(buffer);
+
+
+
+/* globals */
+char *progName;
+extern int stop_decoding;
+
+int id3v2_tag(unsigned char *buffer)
+{
+ if (strncmp(buffer, "ID3", 3) == 0) {
+ unsigned long tagsize;
+
+ /* high bit is not used */
+ tagsize = (buffer[6] << 21) | (buffer[7] << 14) |
+ (buffer[8] << 7) | (buffer[9] << 0);
+
+ tagsize += 10;
+
+ return tagsize;
+ } else {
+ return 0;
+ }
+}
+
+char *file_ext[] =
+{
+ NULL,
+ ".wav",
+ ".aif",
+ ".au",
+ ".au",
+ NULL
+};
+
+/* MicroSoft channel definitions */
+#define SPEAKER_FRONT_LEFT 0x1
+#define SPEAKER_FRONT_RIGHT 0x2
+#define SPEAKER_FRONT_CENTER 0x4
+#define SPEAKER_LOW_FREQUENCY 0x8
+#define SPEAKER_BACK_LEFT 0x10
+#define SPEAKER_BACK_RIGHT 0x20
+#define SPEAKER_FRONT_LEFT_OF_CENTER 0x40
+#define SPEAKER_FRONT_RIGHT_OF_CENTER 0x80
+#define SPEAKER_BACK_CENTER 0x100
+#define SPEAKER_SIDE_LEFT 0x200
+#define SPEAKER_SIDE_RIGHT 0x400
+#define SPEAKER_TOP_CENTER 0x800
+#define SPEAKER_TOP_FRONT_LEFT 0x1000
+#define SPEAKER_TOP_FRONT_CENTER 0x2000
+#define SPEAKER_TOP_FRONT_RIGHT 0x4000
+#define SPEAKER_TOP_BACK_LEFT 0x8000
+#define SPEAKER_TOP_BACK_CENTER 0x10000
+#define SPEAKER_TOP_BACK_RIGHT 0x20000
+#define SPEAKER_RESERVED 0x80000000
+
+long aacChannelConfig2wavexChannelMask(NeAACDecFrameInfo *hInfo)
+{
+ if (hInfo->channels == 6 && hInfo->num_lfe_channels)
+ {
+ return SPEAKER_FRONT_LEFT + SPEAKER_FRONT_RIGHT +
+ SPEAKER_FRONT_CENTER + SPEAKER_LOW_FREQUENCY +
+ SPEAKER_BACK_LEFT + SPEAKER_BACK_RIGHT;
+ } else {
+ return 0;
+ }
+}
+
+int decodeAACfile(char *sndfile, int def_srate, aac_dec_opt *opt)
+{
+ int tagsize;
+ unsigned long samplerate;
+ unsigned char channels;
+ void *sample_buffer;
+
+ FILE *infile;
+
+ audio_file *aufile;
+
+ NeAACDecHandle hDecoder;
+ NeAACDecFrameInfo frameInfo;
+ NeAACDecConfigurationPtr config;
+
+ int first_time = 1;
+
+
+ /* declare variables for buffering */
+ DEC_BUFF_VARS
+
+ infile = fopen(opt->filename, "rb");
+ if (infile == NULL)
+ {
+ /* unable to open file */
+ error_handler("Error opening file: %s\n", opt->filename);
+ return 1;
+ }
+ INIT_BUFF(infile)
+
+ tagsize = id3v2_tag(buffer);
+ if (tagsize)
+ {
+ UPDATE_BUFF_SKIP(tagsize)
+ }
+
+ hDecoder = NeAACDecOpen();
+
+ /* Set the default object type and samplerate */
+ /* This is useful for RAW AAC files */
+ config = NeAACDecGetCurrentConfiguration(hDecoder);
+ if (def_srate)
+ config->defSampleRate = def_srate;
+ config->defObjectType = opt->object_type;
+ config->outputFormat = opt->output_format;
+
+ NeAACDecSetConfiguration(hDecoder, config);
+
+ if ((bytesconsumed = NeAACDecInit(hDecoder, buffer, bytes_in_buffer,
+ &samplerate, &channels)) < 0)
+ {
+ /* If some error initializing occured, skip the file */
+ error_handler("Error initializing decoder library.\n");
+ END_BUFF
+ NeAACDecClose(hDecoder);
+ fclose(infile);
+ return 1;
+ }
+ buffer_index += bytesconsumed;
+
+ do
+ {
+ /* update buffer */
+ UPDATE_BUFF_READ
+
+ sample_buffer = NeAACDecDecode(hDecoder, &frameInfo, buffer, bytes_in_buffer);
+
+ /* update buffer indices */
+ UPDATE_BUFF_IDX(frameInfo)
+
+ if (frameInfo.error > 0)
+ {
+ error_handler("Error: %s\n",
+ NeAACDecGetErrorMessage(frameInfo.error));
+ }
+
+ opt->progress_update((long)fileread, buffer_index);
+
+ /* open the sound file now that the number of channels are known */
+ if (first_time && !frameInfo.error)
+ {
+ if(opt->decode_mode == 0)
+ {
+ if (Set_WIN_Params (INVALID_FILEDESC, samplerate, SAMPLE_SIZE,
+ frameInfo.channels) < 0)
+ {
+ error_handler("\nCan't access %s\n", "WAVE OUT");
+ END_BUFF
+ NeAACDecClose(hDecoder);
+ fclose(infile);
+ return (0);
+ }
+ }
+ else
+ {
+ aufile = open_audio_file(sndfile, samplerate, frameInfo.channels,
+ opt->output_format, opt->file_type, aacChannelConfig2wavexChannelMask(&frameInfo));
+
+ if (aufile == NULL)
+ {
+ END_BUFF
+ NeAACDecClose(hDecoder);
+ fclose(infile);
+ return 0;
+ }
+ }
+ first_time = 0;
+ }
+
+ if ((frameInfo.error == 0) && (frameInfo.samples > 0))
+ {
+ if(opt->decode_mode == 0)
+ WIN_Play_Samples((short*)sample_buffer, frameInfo.channels*frameInfo.samples);
+ else
+ write_audio_file(aufile, sample_buffer, frameInfo.samples, 0);
+ }
+
+ if (buffer_index >= fileread)
+ sample_buffer = NULL; /* to make sure it stops now */
+
+ if(stop_decoding)
+ break;
+
+ } while (sample_buffer != NULL);
+
+ NeAACDecClose(hDecoder);
+
+ fclose(infile);
+
+ if(opt->decode_mode == 0)
+ WIN_Audio_close();
+ else
+ {
+ if (!first_time)
+ close_audio_file(aufile);
+ }
+
+ END_BUFF
+
+ return frameInfo.error;
+}
+
+int GetAACTrack(mp4ff_t *infile)
+{
+ /* find AAC track */
+ int i, rc;
+ int numTracks = mp4ff_total_tracks(infile);
+
+ for (i = 0; i < numTracks; i++)
+ {
+ unsigned char *buff = NULL;
+ int buff_size = 0;
+ mp4AudioSpecificConfig mp4ASC;
+
+ mp4ff_get_decoder_config(infile, i, &buff, &buff_size);
+
+ if (buff)
+ {
+ rc = NeAACDecAudioSpecificConfig(buff, buff_size, &mp4ASC);
+ free(buff);
+
+ if (rc < 0)
+ continue;
+ return i;
+ }
+ }
+
+ /* can't decode this */
+ return -1;
+}
+
+unsigned long srates[] =
+{
+ 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000,
+ 12000, 11025, 8000
+};
+
+uint32_t read_callback(void *user_data, void *buffer, uint32_t length)
+{
+ return fread(buffer, 1, length, (FILE*)user_data);
+}
+
+uint32_t seek_callback(void *user_data, uint64_t position)
+{
+ return fseek((FILE*)user_data, position, SEEK_SET);
+}
+
+int decodeMP4file(char *sndfile, aac_dec_opt *opt)
+{
+ int track;
+ unsigned long samplerate;
+ unsigned char channels;
+ void *sample_buffer;
+
+ mp4ff_t *infile;
+ FILE *mp4File;
+ int sampleId, numSamples;
+
+ audio_file *aufile;
+
+ NeAACDecHandle hDecoder;
+ NeAACDecFrameInfo frameInfo;
+
+ unsigned char *buffer;
+ int buffer_size;
+
+ int first_time = 1;
+
+ /* initialise the callback structure */
+ mp4ff_callback_t *mp4cb = malloc(sizeof(mp4ff_callback_t));
+
+ mp4File = fopen(opt->filename, "rb");
+ mp4cb->read = read_callback;
+ mp4cb->seek = seek_callback;
+ mp4cb->user_data = mp4File;
+
+ infile = mp4ff_open_read(mp4cb);
+ if (!infile)
+ {
+ /* unable to open file */
+ error_handler("Error opening file: %s\n", opt->filename);
+ return 1;
+ }
+
+ if ((track = GetAACTrack(infile)) < 0)
+ {
+ error_handler("Unable to find correct AAC sound track in the MP4 file.\n");
+ mp4ff_close(infile);
+ free(mp4cb);
+ fclose(mp4File);
+ return 1;
+ }
+
+ buffer = NULL;
+ buffer_size = 0;
+ mp4ff_get_decoder_config(infile, track, &buffer, &buffer_size);
+
+ hDecoder = NeAACDecOpen();
+
+ if(NeAACDecInit2(hDecoder, buffer, buffer_size, &samplerate, &channels) < 0)
+ {
+ /* If some error initializing occured, skip the file */
+ error_handler("Error initializing decoder library.\n");
+ NeAACDecClose(hDecoder);
+ mp4ff_close(infile);
+ free(mp4cb);
+ fclose(mp4File);
+ return 1;
+ }
+ if (buffer)
+ free(buffer);
+
+ numSamples = mp4ff_num_samples(infile, track);
+
+ for (sampleId = 0; sampleId < numSamples; sampleId++)
+ {
+ int rc;
+
+ /* get access unit from MP4 file */
+ buffer = NULL;
+ buffer_size = 0;
+
+ rc = mp4ff_read_sample(infile, track, sampleId, &buffer, &buffer_size);
+ if (rc == 0)
+ {
+ error_handler("Reading from MP4 file failed.\n");
+ NeAACDecClose(hDecoder);
+ mp4ff_close(infile);
+ free(mp4cb);
+ fclose(mp4File);
+ return 1;
+ }
+
+ sample_buffer = NeAACDecDecode(hDecoder, &frameInfo, buffer, buffer_size);
+
+ if (buffer)
+ free(buffer);
+
+ opt->progress_update((long)numSamples, sampleId);
+
+ /* open the sound file now that the number of channels are known */
+ if (first_time && !frameInfo.error)
+ {
+ if(opt->decode_mode == 0)
+ {
+ if (Set_WIN_Params (INVALID_FILEDESC, samplerate, SAMPLE_SIZE,
+ frameInfo.channels) < 0)
+ {
+ error_handler("\nCan't access %s\n", "WAVE OUT");
+ NeAACDecClose(hDecoder);
+ mp4ff_close(infile);
+ free(mp4cb);
+ fclose(mp4File);
+ return (0);
+ }
+ }
+ else
+ {
+ aufile = open_audio_file(sndfile, samplerate, frameInfo.channels,
+ opt->output_format, opt->file_type, aacChannelConfig2wavexChannelMask(&frameInfo));
+
+ if (aufile == NULL)
+ {
+ NeAACDecClose(hDecoder);
+ mp4ff_close(infile);
+ free(mp4cb);
+ fclose(mp4File);
+ return 0;
+ }
+ }
+ first_time = 0;
+ }
+
+ if ((frameInfo.error == 0) && (frameInfo.samples > 0))
+ {
+ if(opt->decode_mode == 0)
+ WIN_Play_Samples((short*)sample_buffer, frameInfo.channels*frameInfo.samples);
+ else
+ write_audio_file(aufile, sample_buffer, frameInfo.samples, 0);
+ }
+
+ if (frameInfo.error > 0)
+ {
+ error_handler("Error: %s\n",
+ NeAACDecGetErrorMessage(frameInfo.error));
+ break;
+ }
+ if(stop_decoding)
+ break;
+ }
+
+
+ NeAACDecClose(hDecoder);
+
+
+ mp4ff_close(infile);
+ free(mp4cb);
+ fclose(mp4File);
+
+ if(opt->decode_mode == 0)
+ WIN_Audio_close();
+ else
+ {
+ if (!first_time)
+ close_audio_file(aufile);
+ }
+
+ return frameInfo.error;
+}
+
+int str_no_case_comp(char const *str1, char const *str2, unsigned long len)
+{
+ signed int c1 = 0, c2 = 0;
+
+ while (len--)
+ {
+ c1 = tolower(*str1++);
+ c2 = tolower(*str2++);
+
+ if (c1 == 0 || c1 != c2)
+ break;
+ }
+
+ return c1 - c2;
+}
+
+int aac_decode(aac_dec_opt *opt)
+{
+ int result;
+ int def_srate = 0;
+ int outfile_set = 0;
+ int mp4file = 0;
+ char *fnp;
+ char audioFileName[MAX_PATH];
+ unsigned char header[8];
+ FILE *hMP4File;
+
+
+ /* point to the specified file name */
+ strcpy(audioFileName, opt->filename);
+ fnp = (char *)strrchr(audioFileName,'.');
+ if (fnp)
+ fnp[0] = '\0';
+ strcat(audioFileName, file_ext[opt->file_type]);
+
+ mp4file = 0;
+ hMP4File = fopen(opt->filename, "rb");
+ if (!hMP4File)
+ {
+ return 1;
+ }
+ fread(header, 1, 8, hMP4File);
+ fclose(hMP4File);
+ if (header[4] == 'f' && header[5] == 't' && header[6] == 'y' && header[7] == 'p')
+ mp4file = 1;
+
+ if (mp4file)
+ {
+ result = decodeMP4file(audioFileName, opt);
+ }
+ else
+ {
+ result = decodeAACfile(audioFileName, def_srate, opt);
+ }
+
+ return 0;
+}
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