diff options
Diffstat (limited to 'faad2/src/libfaad/decoder.c')
| -rw-r--r-- | faad2/src/libfaad/decoder.c | 1223 |
1 files changed, 0 insertions, 1223 deletions
diff --git a/faad2/src/libfaad/decoder.c b/faad2/src/libfaad/decoder.c deleted file mode 100644 index 08eea6c..0000000 --- a/faad2/src/libfaad/decoder.c +++ /dev/null @@ -1,1223 +0,0 @@ -/*
-** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
-** Copyright (C) 2003-2005 M. Bakker, Nero 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.
-**
-** The "appropriate copyright message" mentioned in section 2c of the GPLv2
-** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
-**
-** Commercial non-GPL licensing of this software is possible.
-** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
-**
-** $Id: decoder.c,v 1.117 2009/02/05 00:51:03 menno Exp $
-**/
-
-#include "common.h"
-#include "structs.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "mp4.h"
-#include "syntax.h"
-#include "error.h"
-#include "output.h"
-#include "filtbank.h"
-#include "drc.h"
-#ifdef SBR_DEC
-#include "sbr_dec.h"
-#include "sbr_syntax.h"
-#endif
-#ifdef SSR_DEC
-#include "ssr.h"
-#endif
-
-#ifdef ANALYSIS
-uint16_t dbg_count;
-#endif
-
-/* static function declarations */
-static void* aac_frame_decode(NeAACDecStruct *hDecoder,
- NeAACDecFrameInfo *hInfo,
- unsigned char *buffer,
- unsigned long buffer_size,
- void **sample_buffer2,
- unsigned long sample_buffer_size);
-static void create_channel_config(NeAACDecStruct *hDecoder,
- NeAACDecFrameInfo *hInfo);
-
-
-char* NEAACDECAPI NeAACDecGetErrorMessage(unsigned char errcode)
-{
- if (errcode >= NUM_ERROR_MESSAGES)
- return NULL;
- return err_msg[errcode];
-}
-
-unsigned long NEAACDECAPI NeAACDecGetCapabilities(void)
-{
- uint32_t cap = 0;
-
- /* can't do without it */
- cap += LC_DEC_CAP;
-
-#ifdef MAIN_DEC
- cap += MAIN_DEC_CAP;
-#endif
-#ifdef LTP_DEC
- cap += LTP_DEC_CAP;
-#endif
-#ifdef LD_DEC
- cap += LD_DEC_CAP;
-#endif
-#ifdef ERROR_RESILIENCE
- cap += ERROR_RESILIENCE_CAP;
-#endif
-#ifdef FIXED_POINT
- cap += FIXED_POINT_CAP;
-#endif
-
- return cap;
-}
-
-const unsigned char mes[] = { 0x67,0x20,0x61,0x20,0x20,0x20,0x6f,0x20,0x72,0x20,0x65,0x20,0x6e,0x20,0x20,0x20,0x74,0x20,0x68,0x20,0x67,0x20,0x69,0x20,0x72,0x20,0x79,0x20,0x70,0x20,0x6f,0x20,0x63 };
-NeAACDecHandle NEAACDECAPI NeAACDecOpen(void)
-{
- uint8_t i;
- NeAACDecStruct *hDecoder = NULL;
-
- if ((hDecoder = (NeAACDecStruct*)faad_malloc(sizeof(NeAACDecStruct))) == NULL)
- return NULL;
-
- memset(hDecoder, 0, sizeof(NeAACDecStruct));
-
- hDecoder->cmes = mes;
- hDecoder->config.outputFormat = FAAD_FMT_16BIT;
- hDecoder->config.defObjectType = MAIN;
- hDecoder->config.defSampleRate = 44100; /* Default: 44.1kHz */
- hDecoder->config.downMatrix = 0;
- hDecoder->adts_header_present = 0;
- hDecoder->adif_header_present = 0;
- hDecoder->latm_header_present = 0;
-#ifdef ERROR_RESILIENCE
- hDecoder->aacSectionDataResilienceFlag = 0;
- hDecoder->aacScalefactorDataResilienceFlag = 0;
- hDecoder->aacSpectralDataResilienceFlag = 0;
-#endif
- hDecoder->frameLength = 1024;
-
- hDecoder->frame = 0;
- hDecoder->sample_buffer = NULL;
-
- hDecoder->__r1 = 1;
- hDecoder->__r2 = 1;
-
- for (i = 0; i < MAX_CHANNELS; i++)
- {
- hDecoder->window_shape_prev[i] = 0;
- hDecoder->time_out[i] = NULL;
- hDecoder->fb_intermed[i] = NULL;
-#ifdef SSR_DEC
- hDecoder->ssr_overlap[i] = NULL;
- hDecoder->prev_fmd[i] = NULL;
-#endif
-#ifdef MAIN_DEC
- hDecoder->pred_stat[i] = NULL;
-#endif
-#ifdef LTP_DEC
- hDecoder->ltp_lag[i] = 0;
- hDecoder->lt_pred_stat[i] = NULL;
-#endif
- }
-
-#ifdef SBR_DEC
- for (i = 0; i < MAX_SYNTAX_ELEMENTS; i++)
- {
- hDecoder->sbr[i] = NULL;
- }
-#endif
-
- hDecoder->drc = drc_init(REAL_CONST(1.0), REAL_CONST(1.0));
-
- return hDecoder;
-}
-
-NeAACDecConfigurationPtr NEAACDECAPI NeAACDecGetCurrentConfiguration(NeAACDecHandle hpDecoder)
-{
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
- if (hDecoder)
- {
- NeAACDecConfigurationPtr config = &(hDecoder->config);
-
- return config;
- }
-
- return NULL;
-}
-
-unsigned char NEAACDECAPI NeAACDecSetConfiguration(NeAACDecHandle hpDecoder,
- NeAACDecConfigurationPtr config)
-{
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
- if (hDecoder && config)
- {
- /* check if we can decode this object type */
- if (can_decode_ot(config->defObjectType) < 0)
- return 0;
- hDecoder->config.defObjectType = config->defObjectType;
-
- /* samplerate: anything but 0 should be possible */
- if (config->defSampleRate == 0)
- return 0;
- hDecoder->config.defSampleRate = config->defSampleRate;
-
- /* check output format */
-#ifdef FIXED_POINT
- if ((config->outputFormat < 1) || (config->outputFormat > 4))
- return 0;
-#else
- if ((config->outputFormat < 1) || (config->outputFormat > 5))
- return 0;
-#endif
- hDecoder->config.outputFormat = config->outputFormat;
-
- if (config->downMatrix > 1)
- return 0;
- hDecoder->config.downMatrix = config->downMatrix;
-
- /* OK */
- return 1;
- }
-
- return 0;
-}
-
-
-static int latmCheck(latm_header *latm, bitfile *ld)
-{
- uint32_t good=0, bad=0, bits, m;
-
- while (ld->bytes_left)
- {
- bits = faad_latm_frame(latm, ld);
- if(bits==-1U)
- bad++;
- else
- {
- good++;
- while(bits>0)
- {
- m = min(bits, 8);
- faad_getbits(ld, m);
- bits -= m;
- }
- }
- }
-
- return (good>0);
-}
-
-
-long NEAACDECAPI NeAACDecInit(NeAACDecHandle hpDecoder,
- unsigned char *buffer,
- unsigned long buffer_size,
- unsigned long *samplerate,
- unsigned char *channels)
-{
- uint32_t bits = 0;
- bitfile ld;
- adif_header adif;
- adts_header adts;
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
-
-
- if ((hDecoder == NULL) || (samplerate == NULL) || (channels == NULL))
- return -1;
-
- hDecoder->sf_index = get_sr_index(hDecoder->config.defSampleRate);
- hDecoder->object_type = hDecoder->config.defObjectType;
- *samplerate = get_sample_rate(hDecoder->sf_index);
- *channels = 1;
-
- if (buffer != NULL)
- {
-#if 0
- int is_latm;
- latm_header *l = &hDecoder->latm_config;
-#endif
-
- faad_initbits(&ld, buffer, buffer_size);
-
-#if 0
- memset(l, 0, sizeof(latm_header));
- is_latm = latmCheck(l, &ld);
- l->inited = 0;
- l->frameLength = 0;
- faad_rewindbits(&ld);
- if(is_latm && l->ASCbits>0)
- {
- int32_t x;
- hDecoder->latm_header_present = 1;
- x = NeAACDecInit2(hDecoder, l->ASC, (l->ASCbits+7)/8, samplerate, channels);
- if(x!=0)
- hDecoder->latm_header_present = 0;
- return x;
- } else
-#endif
- /* Check if an ADIF header is present */
- if ((buffer[0] == 'A') && (buffer[1] == 'D') &&
- (buffer[2] == 'I') && (buffer[3] == 'F'))
- {
- hDecoder->adif_header_present = 1;
-
- get_adif_header(&adif, &ld);
- faad_byte_align(&ld);
-
- hDecoder->sf_index = adif.pce[0].sf_index;
- hDecoder->object_type = adif.pce[0].object_type + 1;
-
- *samplerate = get_sample_rate(hDecoder->sf_index);
- *channels = adif.pce[0].channels;
-
- memcpy(&(hDecoder->pce), &(adif.pce[0]), sizeof(program_config));
- hDecoder->pce_set = 1;
-
- bits = bit2byte(faad_get_processed_bits(&ld));
-
- /* Check if an ADTS header is present */
- } else if (faad_showbits(&ld, 12) == 0xfff) {
- hDecoder->adts_header_present = 1;
-
- adts.old_format = hDecoder->config.useOldADTSFormat;
- adts_frame(&adts, &ld);
-
- hDecoder->sf_index = adts.sf_index;
- hDecoder->object_type = adts.profile + 1;
-
- *samplerate = get_sample_rate(hDecoder->sf_index);
- *channels = (adts.channel_configuration > 6) ?
- 2 : adts.channel_configuration;
- }
-
- if (ld.error)
- {
- faad_endbits(&ld);
- return -1;
- }
- faad_endbits(&ld);
- }
-
-#if (defined(PS_DEC) || defined(DRM_PS))
- /* check if we have a mono file */
- if (*channels == 1)
- {
- /* upMatrix to 2 channels for implicit signalling of PS */
- *channels = 2;
- }
-#endif
-
- hDecoder->channelConfiguration = *channels;
-
-#ifdef SBR_DEC
- /* implicit signalling */
- if (*samplerate <= 24000 && (hDecoder->config.dontUpSampleImplicitSBR == 0))
- {
- *samplerate *= 2;
- hDecoder->forceUpSampling = 1;
- } else if (*samplerate > 24000 && (hDecoder->config.dontUpSampleImplicitSBR == 0)) {
- hDecoder->downSampledSBR = 1;
- }
-#endif
-
- /* must be done before frameLength is divided by 2 for LD */
-#ifdef SSR_DEC
- if (hDecoder->object_type == SSR)
- hDecoder->fb = ssr_filter_bank_init(hDecoder->frameLength/SSR_BANDS);
- else
-#endif
- hDecoder->fb = filter_bank_init(hDecoder->frameLength);
-
-#ifdef LD_DEC
- if (hDecoder->object_type == LD)
- hDecoder->frameLength >>= 1;
-#endif
-
- if (can_decode_ot(hDecoder->object_type) < 0)
- return -1;
-
- return bits;
-}
-
-/* Init the library using a DecoderSpecificInfo */
-char NEAACDECAPI NeAACDecInit2(NeAACDecHandle hpDecoder,
- unsigned char *pBuffer,
- unsigned long SizeOfDecoderSpecificInfo,
- unsigned long *samplerate,
- unsigned char *channels)
-{
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
- int8_t rc;
- mp4AudioSpecificConfig mp4ASC;
-
- if((hDecoder == NULL)
- || (pBuffer == NULL)
- || (SizeOfDecoderSpecificInfo < 2)
- || (samplerate == NULL)
- || (channels == NULL))
- {
- return -1;
- }
-
- hDecoder->adif_header_present = 0;
- hDecoder->adts_header_present = 0;
-
- /* decode the audio specific config */
- rc = AudioSpecificConfig2(pBuffer, SizeOfDecoderSpecificInfo, &mp4ASC,
- &(hDecoder->pce), hDecoder->latm_header_present);
-
- /* copy the relevant info to the decoder handle */
- *samplerate = mp4ASC.samplingFrequency;
- if (mp4ASC.channelsConfiguration)
- {
- *channels = mp4ASC.channelsConfiguration;
- } else {
- *channels = hDecoder->pce.channels;
- hDecoder->pce_set = 1;
- }
-#if (defined(PS_DEC) || defined(DRM_PS))
- /* check if we have a mono file */
- if (*channels == 1)
- {
- /* upMatrix to 2 channels for implicit signalling of PS */
- *channels = 2;
- }
-#endif
- hDecoder->sf_index = mp4ASC.samplingFrequencyIndex;
- hDecoder->object_type = mp4ASC.objectTypeIndex;
-#ifdef ERROR_RESILIENCE
- hDecoder->aacSectionDataResilienceFlag = mp4ASC.aacSectionDataResilienceFlag;
- hDecoder->aacScalefactorDataResilienceFlag = mp4ASC.aacScalefactorDataResilienceFlag;
- hDecoder->aacSpectralDataResilienceFlag = mp4ASC.aacSpectralDataResilienceFlag;
-#endif
-#ifdef SBR_DEC
- hDecoder->sbr_present_flag = mp4ASC.sbr_present_flag;
- hDecoder->downSampledSBR = mp4ASC.downSampledSBR;
- if (hDecoder->config.dontUpSampleImplicitSBR == 0)
- hDecoder->forceUpSampling = mp4ASC.forceUpSampling;
- else
- hDecoder->forceUpSampling = 0;
-
- /* AAC core decoder samplerate is 2 times as low */
- if (((hDecoder->sbr_present_flag == 1)&&(!hDecoder->downSampledSBR)) || hDecoder->forceUpSampling == 1)
- {
- hDecoder->sf_index = get_sr_index(mp4ASC.samplingFrequency / 2);
- }
-#endif
-
- if (rc != 0)
- {
- return rc;
- }
- hDecoder->channelConfiguration = mp4ASC.channelsConfiguration;
- if (mp4ASC.frameLengthFlag)
-#ifdef ALLOW_SMALL_FRAMELENGTH
- hDecoder->frameLength = 960;
-#else
- return -1;
-#endif
-
- /* must be done before frameLength is divided by 2 for LD */
-#ifdef SSR_DEC
- if (hDecoder->object_type == SSR)
- hDecoder->fb = ssr_filter_bank_init(hDecoder->frameLength/SSR_BANDS);
- else
-#endif
- hDecoder->fb = filter_bank_init(hDecoder->frameLength);
-
-#ifdef LD_DEC
- if (hDecoder->object_type == LD)
- hDecoder->frameLength >>= 1;
-#endif
-
- return 0;
-}
-
-#ifdef DRM
-char NEAACDECAPI NeAACDecInitDRM(NeAACDecHandle *hpDecoder,
- unsigned long samplerate,
- unsigned char channels)
-{
- NeAACDecStruct** hDecoder = (NeAACDecStruct**)hpDecoder;
- if (hDecoder == NULL)
- return 1; /* error */
-
- NeAACDecClose(*hDecoder);
-
- *hDecoder = NeAACDecOpen();
-
- /* Special object type defined for DRM */
- (*hDecoder)->config.defObjectType = DRM_ER_LC;
-
- (*hDecoder)->config.defSampleRate = samplerate;
-#ifdef ERROR_RESILIENCE // This shoudl always be defined for DRM
- (*hDecoder)->aacSectionDataResilienceFlag = 1; /* VCB11 */
- (*hDecoder)->aacScalefactorDataResilienceFlag = 0; /* no RVLC */
- (*hDecoder)->aacSpectralDataResilienceFlag = 1; /* HCR */
-#endif
- (*hDecoder)->frameLength = 960;
- (*hDecoder)->sf_index = get_sr_index((*hDecoder)->config.defSampleRate);
- (*hDecoder)->object_type = (*hDecoder)->config.defObjectType;
-
- if ((channels == DRMCH_STEREO) || (channels == DRMCH_SBR_STEREO))
- (*hDecoder)->channelConfiguration = 2;
- else
- (*hDecoder)->channelConfiguration = 1;
-
-#ifdef SBR_DEC
- if ((channels == DRMCH_MONO) || (channels == DRMCH_STEREO))
- (*hDecoder)->sbr_present_flag = 0;
- else
- (*hDecoder)->sbr_present_flag = 1;
-#endif
-
- (*hDecoder)->fb = filter_bank_init((*hDecoder)->frameLength);
-
- return 0;
-}
-#endif
-
-void NEAACDECAPI NeAACDecClose(NeAACDecHandle hpDecoder)
-{
- uint8_t i;
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
-
- if (hDecoder == NULL)
- return;
-
-#ifdef PROFILE
- printf("AAC decoder total: %I64d cycles\n", hDecoder->cycles);
- printf("requant: %I64d cycles\n", hDecoder->requant_cycles);
- printf("spectral_data: %I64d cycles\n", hDecoder->spectral_cycles);
- printf("scalefactors: %I64d cycles\n", hDecoder->scalefac_cycles);
- printf("output: %I64d cycles\n", hDecoder->output_cycles);
-#endif
-
- for (i = 0; i < MAX_CHANNELS; i++)
- {
- if (hDecoder->time_out[i]) faad_free(hDecoder->time_out[i]);
- if (hDecoder->fb_intermed[i]) faad_free(hDecoder->fb_intermed[i]);
-#ifdef SSR_DEC
- if (hDecoder->ssr_overlap[i]) faad_free(hDecoder->ssr_overlap[i]);
- if (hDecoder->prev_fmd[i]) faad_free(hDecoder->prev_fmd[i]);
-#endif
-#ifdef MAIN_DEC
- if (hDecoder->pred_stat[i]) faad_free(hDecoder->pred_stat[i]);
-#endif
-#ifdef LTP_DEC
- if (hDecoder->lt_pred_stat[i]) faad_free(hDecoder->lt_pred_stat[i]);
-#endif
- }
-
-#ifdef SSR_DEC
- if (hDecoder->object_type == SSR)
- ssr_filter_bank_end(hDecoder->fb);
- else
-#endif
- filter_bank_end(hDecoder->fb);
-
- drc_end(hDecoder->drc);
-
- if (hDecoder->sample_buffer) faad_free(hDecoder->sample_buffer);
-
-#ifdef SBR_DEC
- for (i = 0; i < MAX_SYNTAX_ELEMENTS; i++)
- {
- if (hDecoder->sbr[i])
- sbrDecodeEnd(hDecoder->sbr[i]);
- }
-#endif
-
- if (hDecoder) faad_free(hDecoder);
-}
-
-void NEAACDECAPI NeAACDecPostSeekReset(NeAACDecHandle hpDecoder, long frame)
-{
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
- if (hDecoder)
- {
- hDecoder->postSeekResetFlag = 1;
-
- if (frame != -1)
- hDecoder->frame = frame;
- }
-}
-
-static void create_channel_config(NeAACDecStruct *hDecoder, NeAACDecFrameInfo *hInfo)
-{
- hInfo->num_front_channels = 0;
- hInfo->num_side_channels = 0;
- hInfo->num_back_channels = 0;
- hInfo->num_lfe_channels = 0;
- memset(hInfo->channel_position, 0, MAX_CHANNELS*sizeof(uint8_t));
-
- if (hDecoder->downMatrix)
- {
- hInfo->num_front_channels = 2;
- hInfo->channel_position[0] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[1] = FRONT_CHANNEL_RIGHT;
- return;
- }
-
- /* check if there is a PCE */
- if (hDecoder->pce_set)
- {
- uint8_t i, chpos = 0;
- uint8_t chdir, back_center = 0;
-
- hInfo->num_front_channels = hDecoder->pce.num_front_channels;
- hInfo->num_side_channels = hDecoder->pce.num_side_channels;
- hInfo->num_back_channels = hDecoder->pce.num_back_channels;
- hInfo->num_lfe_channels = hDecoder->pce.num_lfe_channels;
-
- chdir = hInfo->num_front_channels;
- if (chdir & 1)
- {
-#if (defined(PS_DEC) || defined(DRM_PS))
- /* When PS is enabled output is always stereo */
- hInfo->channel_position[chpos++] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[chpos++] = FRONT_CHANNEL_RIGHT;
-#else
- hInfo->channel_position[chpos++] = FRONT_CHANNEL_CENTER;
- chdir--;
-#endif
- }
- for (i = 0; i < chdir; i += 2)
- {
- hInfo->channel_position[chpos++] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[chpos++] = FRONT_CHANNEL_RIGHT;
- }
-
- for (i = 0; i < hInfo->num_side_channels; i += 2)
- {
- hInfo->channel_position[chpos++] = SIDE_CHANNEL_LEFT;
- hInfo->channel_position[chpos++] = SIDE_CHANNEL_RIGHT;
- }
-
- chdir = hInfo->num_back_channels;
- if (chdir & 1)
- {
- back_center = 1;
- chdir--;
- }
- for (i = 0; i < chdir; i += 2)
- {
- hInfo->channel_position[chpos++] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[chpos++] = BACK_CHANNEL_RIGHT;
- }
- if (back_center)
- {
- hInfo->channel_position[chpos++] = BACK_CHANNEL_CENTER;
- }
-
- for (i = 0; i < hInfo->num_lfe_channels; i++)
- {
- hInfo->channel_position[chpos++] = LFE_CHANNEL;
- }
-
- } else {
- switch (hDecoder->channelConfiguration)
- {
- case 1:
-#if (defined(PS_DEC) || defined(DRM_PS))
- /* When PS is enabled output is always stereo */
- hInfo->num_front_channels = 2;
- hInfo->channel_position[0] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[1] = FRONT_CHANNEL_RIGHT;
-#else
- hInfo->num_front_channels = 1;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
-#endif
- break;
- case 2:
- hInfo->num_front_channels = 2;
- hInfo->channel_position[0] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[1] = FRONT_CHANNEL_RIGHT;
- break;
- case 3:
- hInfo->num_front_channels = 3;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
- break;
- case 4:
- hInfo->num_front_channels = 3;
- hInfo->num_back_channels = 1;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
- hInfo->channel_position[3] = BACK_CHANNEL_CENTER;
- break;
- case 5:
- hInfo->num_front_channels = 3;
- hInfo->num_back_channels = 2;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
- hInfo->channel_position[3] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[4] = BACK_CHANNEL_RIGHT;
- break;
- case 6:
- hInfo->num_front_channels = 3;
- hInfo->num_back_channels = 2;
- hInfo->num_lfe_channels = 1;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
- hInfo->channel_position[3] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[4] = BACK_CHANNEL_RIGHT;
- hInfo->channel_position[5] = LFE_CHANNEL;
- break;
- case 7:
- hInfo->num_front_channels = 3;
- hInfo->num_side_channels = 2;
- hInfo->num_back_channels = 2;
- hInfo->num_lfe_channels = 1;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
- hInfo->channel_position[3] = SIDE_CHANNEL_LEFT;
- hInfo->channel_position[4] = SIDE_CHANNEL_RIGHT;
- hInfo->channel_position[5] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[6] = BACK_CHANNEL_RIGHT;
- hInfo->channel_position[7] = LFE_CHANNEL;
- break;
- default: /* channelConfiguration == 0 || channelConfiguration > 7 */
- {
- uint8_t i;
- uint8_t ch = hDecoder->fr_channels - hDecoder->has_lfe;
- if (ch & 1) /* there's either a center front or a center back channel */
- {
- uint8_t ch1 = (ch-1)/2;
- if (hDecoder->first_syn_ele == ID_SCE)
- {
- hInfo->num_front_channels = ch1 + 1;
- hInfo->num_back_channels = ch1;
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- for (i = 1; i <= ch1; i+=2)
- {
- hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
- }
- for (i = ch1+1; i < ch; i+=2)
- {
- hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
- }
- } else {
- hInfo->num_front_channels = ch1;
- hInfo->num_back_channels = ch1 + 1;
- for (i = 0; i < ch1; i+=2)
- {
- hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
- }
- for (i = ch1; i < ch-1; i+=2)
- {
- hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
- }
- hInfo->channel_position[ch-1] = BACK_CHANNEL_CENTER;
- }
- } else {
- uint8_t ch1 = (ch)/2;
- hInfo->num_front_channels = ch1;
- hInfo->num_back_channels = ch1;
- if (ch1 & 1)
- {
- hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
- for (i = 1; i <= ch1; i+=2)
- {
- hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
- }
- for (i = ch1+1; i < ch-1; i+=2)
- {
- hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
- }
- hInfo->channel_position[ch-1] = BACK_CHANNEL_CENTER;
- } else {
- for (i = 0; i < ch1; i+=2)
- {
- hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
- }
- for (i = ch1; i < ch; i+=2)
- {
- hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
- hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
- }
- }
- }
- hInfo->num_lfe_channels = hDecoder->has_lfe;
- for (i = ch; i < hDecoder->fr_channels; i++)
- {
- hInfo->channel_position[i] = LFE_CHANNEL;
- }
- }
- break;
- }
- }
-}
-
-void* NEAACDECAPI NeAACDecDecode(NeAACDecHandle hpDecoder,
- NeAACDecFrameInfo *hInfo,
- unsigned char *buffer,
- unsigned long buffer_size)
-{
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
- return aac_frame_decode(hDecoder, hInfo, buffer, buffer_size, NULL, 0);
-}
-
-void* NEAACDECAPI NeAACDecDecode2(NeAACDecHandle hpDecoder,
- NeAACDecFrameInfo *hInfo,
- unsigned char *buffer,
- unsigned long buffer_size,
- void **sample_buffer,
- unsigned long sample_buffer_size)
-{
- NeAACDecStruct* hDecoder = (NeAACDecStruct*)hpDecoder;
- if ((sample_buffer == NULL) || (sample_buffer_size == 0))
- {
- hInfo->error = 27;
- return NULL;
- }
-
- return aac_frame_decode(hDecoder, hInfo, buffer, buffer_size,
- sample_buffer, sample_buffer_size);
-}
-
-#ifdef DRM
-
-#define ERROR_STATE_INIT 6
-
-static void conceal_output(NeAACDecStruct *hDecoder, uint16_t frame_len,
- uint8_t out_ch, void *sample_buffer)
-{
- return;
-}
-#endif
-
-static void* aac_frame_decode(NeAACDecStruct *hDecoder,
- NeAACDecFrameInfo *hInfo,
- unsigned char *buffer,
- unsigned long buffer_size,
- void **sample_buffer2,
- unsigned long sample_buffer_size)
-{
- uint16_t i;
- uint8_t channels = 0;
- uint8_t output_channels = 0;
- bitfile ld = {0};
- uint32_t bitsconsumed;
- uint16_t frame_len;
- void *sample_buffer;
- uint32_t startbit=0, endbit=0, payload_bits=0;
-
-#ifdef PROFILE
- int64_t count = faad_get_ts();
-#endif
-
- /* safety checks */
- if ((hDecoder == NULL) || (hInfo == NULL) || (buffer == NULL))
- {
- return NULL;
- }
-
-#if 0
- printf("%d\n", buffer_size*8);
-#endif
-
- frame_len = hDecoder->frameLength;
-
-
- memset(hInfo, 0, sizeof(NeAACDecFrameInfo));
- memset(hDecoder->internal_channel, 0, MAX_CHANNELS*sizeof(hDecoder->internal_channel[0]));
-
-#ifdef USE_TIME_LIMIT
- if ((TIME_LIMIT * get_sample_rate(hDecoder->sf_index)) > hDecoder->TL_count)
- {
- hDecoder->TL_count += 1024;
- } else {
- hInfo->error = (NUM_ERROR_MESSAGES-1);
- goto error;
- }
-#endif
-
-
- /* check for some common metadata tag types in the bitstream
- * No need to return an error
- */
- /* ID3 */
- if (buffer_size >= 128)
- {
- if (memcmp(buffer, "TAG", 3) == 0)
- {
- /* found it */
- hInfo->bytesconsumed = 128; /* 128 bytes fixed size */
- /* no error, but no output either */
- return NULL;
- }
- }
-
-
- /* initialize the bitstream */
- faad_initbits(&ld, buffer, buffer_size);
-
-#if 0
- {
- int i;
- for (i = 0; i < ((buffer_size+3)>>2); i++)
- {
- uint8_t *buf;
- uint32_t temp = 0;
- buf = faad_getbitbuffer(&ld, 32);
- //temp = getdword((void*)buf);
- temp = *((uint32_t*)buf);
- printf("0x%.8X\n", temp);
- free(buf);
- }
- faad_endbits(&ld);
- faad_initbits(&ld, buffer, buffer_size);
- }
-#endif
-
-#if 0
- if(hDecoder->latm_header_present)
- {
- payload_bits = faad_latm_frame(&hDecoder->latm_config, &ld);
- startbit = faad_get_processed_bits(&ld);
- if(payload_bits == -1U)
- {
- hInfo->error = 1;
- goto error;
- }
- }
-#endif
-
-#ifdef DRM
- if (hDecoder->object_type == DRM_ER_LC)
- {
- /* We do not support stereo right now */
- if (0) //(hDecoder->channelConfiguration == 2)
- {
- hInfo->error = 28; // Throw CRC error
- goto error;
- }
-
- faad_getbits(&ld, 8
- DEBUGVAR(1,1,"NeAACDecDecode(): skip CRC"));
- }
-#endif
-
- if (hDecoder->adts_header_present)
- {
- adts_header adts;
-
- adts.old_format = hDecoder->config.useOldADTSFormat;
- if ((hInfo->error = adts_frame(&adts, &ld)) > 0)
- goto error;
-
- /* MPEG2 does byte_alignment() here,
- * but ADTS header is always multiple of 8 bits in MPEG2
- * so not needed to actually do it.
- */
- }
-
-#ifdef ANALYSIS
- dbg_count = 0;
-#endif
-
- /* decode the complete bitstream */
-#ifdef DRM
- if (/*(hDecoder->object_type == 6) ||*/ (hDecoder->object_type == DRM_ER_LC))
- {
- DRM_aac_scalable_main_element(hDecoder, hInfo, &ld, &hDecoder->pce, hDecoder->drc);
- } else {
-#endif
- raw_data_block(hDecoder, hInfo, &ld, &hDecoder->pce, hDecoder->drc);
-#ifdef DRM
- }
-#endif
-
-#if 0
- if(hDecoder->latm_header_present)
- {
- endbit = faad_get_processed_bits(&ld);
- if(endbit-startbit > payload_bits)
- fprintf(stderr, "\r\nERROR, too many payload bits read: %u > %d. Please. report with a link to a sample\n",
- endbit-startbit, payload_bits);
- if(hDecoder->latm_config.otherDataLenBits > 0)
- faad_getbits(&ld, hDecoder->latm_config.otherDataLenBits);
- faad_byte_align(&ld);
- }
-#endif
-
- channels = hDecoder->fr_channels;
-
- if (hInfo->error > 0)
- goto error;
-
- /* safety check */
- if (channels == 0 || channels > MAX_CHANNELS)
- {
- /* invalid number of channels */
- hInfo->error = 12;
- goto error;
- }
-
- /* no more bit reading after this */
- bitsconsumed = faad_get_processed_bits(&ld);
- hInfo->bytesconsumed = bit2byte(bitsconsumed);
- if (ld.error)
- {
- hInfo->error = 14;
- goto error;
- }
- faad_endbits(&ld);
-
-
- if (!hDecoder->adts_header_present && !hDecoder->adif_header_present
-#if 0
- && !hDecoder->latm_header_present
-#endif
- )
- {
- if (hDecoder->channelConfiguration == 0)
- hDecoder->channelConfiguration = channels;
-
- if (channels == 8) /* 7.1 */
- hDecoder->channelConfiguration = 7;
- if (channels == 7) /* not a standard channelConfiguration */
- hDecoder->channelConfiguration = 0;
- }
-
- if ((channels == 5 || channels == 6) && hDecoder->config.downMatrix)
- {
- hDecoder->downMatrix = 1;
- output_channels = 2;
- } else {
- output_channels = channels;
- }
-
-#if (defined(PS_DEC) || defined(DRM_PS))
- hDecoder->upMatrix = 0;
- /* check if we have a mono file */
- if (output_channels == 1)
- {
- /* upMatrix to 2 channels for implicit signalling of PS */
- hDecoder->upMatrix = 1;
- output_channels = 2;
- }
-#endif
-
- /* Make a channel configuration based on either a PCE or a channelConfiguration */
- create_channel_config(hDecoder, hInfo);
-
- /* number of samples in this frame */
- hInfo->samples = frame_len*output_channels;
- /* number of channels in this frame */
- hInfo->channels = output_channels;
- /* samplerate */
- hInfo->samplerate = get_sample_rate(hDecoder->sf_index);
- /* object type */
- hInfo->object_type = hDecoder->object_type;
- /* sbr */
- hInfo->sbr = NO_SBR;
- /* header type */
- hInfo->header_type = RAW;
- if (hDecoder->adif_header_present)
- hInfo->header_type = ADIF;
- if (hDecoder->adts_header_present)
- hInfo->header_type = ADTS;
-#if 0
- if (hDecoder->latm_header_present)
- hInfo->header_type = LATM;
-#endif
-#if (defined(PS_DEC) || defined(DRM_PS))
- hInfo->ps = hDecoder->ps_used_global;
-#endif
-
- /* check if frame has channel elements */
- if (channels == 0)
- {
- hDecoder->frame++;
- return NULL;
- }
-
- /* allocate the buffer for the final samples */
- if ((hDecoder->sample_buffer == NULL) ||
- (hDecoder->alloced_channels != output_channels))
- {
- static const uint8_t str[] = { sizeof(int16_t), sizeof(int32_t), sizeof(int32_t),
- sizeof(float32_t), sizeof(double), sizeof(int16_t), sizeof(int16_t),
- sizeof(int16_t), sizeof(int16_t), 0, 0, 0
- };
- uint8_t stride = str[hDecoder->config.outputFormat-1];
-#ifdef SBR_DEC
- if (((hDecoder->sbr_present_flag == 1)&&(!hDecoder->downSampledSBR)) || (hDecoder->forceUpSampling == 1))
- {
- stride = 2 * stride;
- }
-#endif
- /* check if we want to use internal sample_buffer */
- if (sample_buffer_size == 0)
- {
- if (hDecoder->sample_buffer)
- faad_free(hDecoder->sample_buffer);
- hDecoder->sample_buffer = NULL;
- hDecoder->sample_buffer = faad_malloc(frame_len*output_channels*stride);
- } else if (sample_buffer_size < frame_len*output_channels*stride) {
- /* provided sample buffer is not big enough */
- hInfo->error = 27;
- return NULL;
- }
- hDecoder->alloced_channels = output_channels;
- }
-
- if (sample_buffer_size == 0)
- {
- sample_buffer = hDecoder->sample_buffer;
- } else {
- sample_buffer = *sample_buffer2;
- }
-
-#ifdef SBR_DEC
- if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
- {
- uint8_t ele;
-
- /* this data is different when SBR is used or when the data is upsampled */
- if (!hDecoder->downSampledSBR)
- {
- frame_len *= 2;
- hInfo->samples *= 2;
- hInfo->samplerate *= 2;
- }
-
- /* check if every element was provided with SBR data */
- for (ele = 0; ele < hDecoder->fr_ch_ele; ele++)
- {
- if (hDecoder->sbr[ele] == NULL)
- {
- hInfo->error = 25;
- goto error;
- }
- }
-
- /* sbr */
- if (hDecoder->sbr_present_flag == 1)
- {
- hInfo->object_type = HE_AAC;
- hInfo->sbr = SBR_UPSAMPLED;
- } else {
- hInfo->sbr = NO_SBR_UPSAMPLED;
- }
- if (hDecoder->downSampledSBR)
- {
- hInfo->sbr = SBR_DOWNSAMPLED;
- }
- }
-#endif
-
-
- sample_buffer = output_to_PCM(hDecoder, hDecoder->time_out, sample_buffer,
- output_channels, frame_len, hDecoder->config.outputFormat);
-
-
-#ifdef DRM
- //conceal_output(hDecoder, frame_len, output_channels, sample_buffer);
-#endif
-
-
- hDecoder->postSeekResetFlag = 0;
-
- hDecoder->frame++;
-#ifdef LD_DEC
- if (hDecoder->object_type != LD)
- {
-#endif
- if (hDecoder->frame <= 1)
- hInfo->samples = 0;
-#ifdef LD_DEC
- } else {
- /* LD encoders will give lower delay */
- if (hDecoder->frame <= 0)
- hInfo->samples = 0;
- }
-#endif
-
- /* cleanup */
-#ifdef ANALYSIS
- fflush(stdout);
-#endif
-
-#ifdef PROFILE
- count = faad_get_ts() - count;
- hDecoder->cycles += count;
-#endif
-
- return sample_buffer;
-
-error:
-
-
-#ifdef DRM
- hDecoder->error_state = ERROR_STATE_INIT;
-#endif
-
- /* reset filterbank state */
- for (i = 0; i < MAX_CHANNELS; i++)
- {
- if (hDecoder->fb_intermed[i] != NULL)
- {
- memset(hDecoder->fb_intermed[i], 0, hDecoder->frameLength*sizeof(real_t));
- }
- }
-#ifdef SBR_DEC
- for (i = 0; i < MAX_SYNTAX_ELEMENTS; i++)
- {
- if (hDecoder->sbr[i] != NULL)
- {
- sbrReset(hDecoder->sbr[i]);
- }
- }
-#endif
-
-
- faad_endbits(&ld);
-
- /* cleanup */
-#ifdef ANALYSIS
- fflush(stdout);
-#endif
-
- return NULL;
-}
|