aac_dec_api_fp.c

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
//     Intel(R) Integrated Performance Primitives AAC Decode Sample for Windows*
//
//  By downloading and installing this sample, you hereby agree that the
//  accompanying Materials are being provided to you under the terms and
//  conditions of the End User License Agreement for the Intel(R) Integrated
//  Performance Primitives product previously accepted by you. Please refer
//  to the file ipplic.htm located in the root directory of your Intel(R) IPP
//  product installation for more information.
//
//  MPEG-4 and AAC are international standards promoted by ISO, IEC, ITU, ETSI
//  and other organizations. Implementations of these standards, or the standard
//  enabled platforms may require licenses from various entities, including
//  Intel Corporation.
//
*/

/********************************************************************/

#include <stdlib.h>
#include "aac_dec_decoding_fp.h"
#include "aac_dec_own_fp.h"
#include "aac_dec_huff_tables.h"
#include "sbrdec_api_fp.h"
#include "sbrdec_tables.h"

/********************************************************************/

#ifndef UMC_MAX
#define UMC_MAX(a,b)    (((a) > (b)) ? (a) : (b))
#endif

/********************************************************************/

AACStatus aacdecReset(AACDec *state)
{
  int i;

  if (!state)
    return AAC_NULL_PTR;

  state->com.m_frame_number = 0;
  state->com.m_index_1st = 0;
  state->com.m_index_2nd = 1;
  state->com.m_index_3rd = 2;

  state->com.noiseState = 0;

  state->com.SbrFlagPresent = 0;
  state->com.ModeDecodeHEAACprofile = HEAAC_HQ_MODE;
  state->com.ModeDwnmxHEAACprofile  = HEAAC_DWNSMPL_OFF;

  for (i = 0; i < CH_MAX; i++) {
    ippsZero_32f(state->m_ltp_buf[i][0], 2048);
    ippsZero_32f(state->m_ltp_buf[i][1], 2048);
    ippsZero_32f(state->m_ltp_buf[i][2], 2048);
    ippsZero_32f(state->m_prev_samples[i], 2048);
    state->com.m_prev_win_shape[i] = 0;
  }

  return AAC_OK;
}

/********************************************************************/

AACStatus aacdecInit(AACDec **state_ptr)
{
  AACDec *state;
  int     i;
  /* HE-AAC */
  int SizeWorkBuf = 0;

  if (!state_ptr)
    return AAC_NULL_PTR;

  state = (AACDec *)ippsMalloc_8u(sizeof(AACDec));

  if (state == NULL)
    return AAC_ALLOC;

  aacdecReset(state);

  state->com.m_is_chmap_valid = 0;
  state->com.m_is_pce_valid = 0;
  state->com.m_sampling_frequency = 0;
  state->com.m_sampling_frequency_index = 0;
  state->com.m_channel_number = 1;
  state->com.m_channel_number_save = 1;
  state->com.m_channel_config = 0;
  state->com.m_frame_size = 1024;
  state->com.adts_channel_configuration = -1;

  state->com.m_audio_object_type = AOT_UNDEF;

  for (i = 0; i < 16; i++) {
    state->com.huffman_tables[i] = NULL;
  }

  for (i = 0; i < 10; i++) {
    state->com.sbrHuffTables[i] = NULL;
  }

  for (i = 0; i < CH_MAX; i++) {
    state->sbrBlock[i]   = NULL;
    state->sbr_filter[i] = NULL;
  }
  state->pWorkBuffer = NULL;


  state->m_filterbank.p_mdct_inv_long = NULL;
  state->m_filterbank.p_mdct_inv_short = NULL;
  state->m_filterbank.p_buffer_inv = NULL;
  state->m_filterbank.p_mdct_fwd_long = NULL;
  state->m_filterbank.p_mdct_fwd_short = NULL;
  state->m_filterbank.p_buffer_fwd = NULL;

  for (i = 0; i < 12; i++) {
    if (ippsVLCDecodeInitAlloc_32s(vlcBooks[i],
                                   vlcTableSizes[i],
                                   vlcSubTablesSizes[i],
                                   vlcNumSubTables[i],
                                   (IppsVLCDecodeSpec_32s**)
                                   (&(state->com.huffman_tables[i]))) != ippStsOk) {
      aacdecClose(state);
      return AAC_ALLOC;
    }
  }

  for (i = 0; i < 10; i++) {
    if (ippsVLCDecodeInitAlloc_32s(vlcSbrBooks[i],
                                   vlcSbrTableSizes[i],
                                   vlcSbrSubTablesSizes[i],
                                   vlcSbrNumSubTables[i],
                                   (IppsVLCDecodeSpec_32s**)
                                   (&(state->com.sbrHuffTables[i]))) != ippStsOk) {
      aacdecClose(state);
      return AAC_ALLOC;
    }
  }

  (state->com.m_sce).stream.p_huffman_tables = (void **)&(state->com.huffman_tables[0]);
  (state->com.m_cpe).streams[0].p_huffman_tables = (void **)&(state->com.huffman_tables[0]);
  (state->com.m_cpe).streams[1].p_huffman_tables = (void **)&(state->com.huffman_tables[0]);
  (state->com.m_cce).stream.p_huffman_tables = (void **)&(state->com.huffman_tables[0]);
  (state->com.m_lfe).stream.p_huffman_tables = (void **)&(state->com.huffman_tables[0]);

  if (InitFilterbank(&(state->m_filterbank), FB_DECODER | FB_ENCODER) != AAC_OK) {
    aacdecClose(state);
    return AAC_ALLOC;
  }

  sbrdecInitFilter( state->sbr_filter, &SizeWorkBuf );
  SizeWorkBuf = UMC_MAX( SizeWorkBuf, SBR_MINSIZE_OF_WORK_BUFFER );
  state->pWorkBuffer = ippsMalloc_8u( SizeWorkBuf );

  for (i = 0; i < CH_MAX; i++) {
    state->sbrBlock[i] = sbrInitDecoder( );

    ippsCopy_8u((const Ipp8u *)(state->com.sbrHuffTables),
      (Ipp8u *)(state->sbrBlock[i]->sbr_com.sbrHuffTables),
                10 * sizeof(void *));

  }

  *state_ptr = state;
  return AAC_OK;
}

/********************************************************************/

#define RETURN_AAC_BAD_STREAM                                     \
{                                                                 \
  GET_BITS_COUNT(pBS, (*decodedBytes))                            \
  *decodedBytes >>= 3;                                            \
  state_com->m_channel_number = state_com->m_channel_number_save; \
  ippsZero_16s(outPointer, 1024 * state_com->m_channel_number);   \
  return AAC_BAD_STREAM;                                          \
}

/********************************************************************/

AACStatus aacdecGetFrame(Ipp8u *inPointer,
                         int *decodedBytes,
                         Ipp16s *outPointer,
                         AACDec *state)
{
  sData_stream_element m_data;
  sDynamic_range_info m_drc_info;

  sBitsreamBuffer BS;
  sBitsreamBuffer *pBS = &BS;
  AACDec_com      *state_com;

  int     el_num = 0;
  int     ch_num = 0;
  int     order_counter = 0;

  int     id;
  int     tag = 0;
  int     ch = 0;

/* HE-AAC param */
  int     cnt_fill_sbr_element = 0;
  int     cnt_idaac_sbr_element = 0;
  int     sbrFlagPresentLFE = 0;
  int     NumRealCh = 0;
  int     ch_counter;
  int     errSBRParser = 0;

  s_tns_data tns_data0;
  s_tns_data tns_data1;
  int     i, j;

  if (!inPointer || !outPointer)
    return AAC_NULL_PTR;

  GET_INIT_BITSTREAM(pBS, inPointer)

  // init
  state_com = &(state->com);
  state->com.m_up_sample  = 1;

  GET_BITS(pBS, id, 3)
  while (id != ID_END) {
    if (CH_MAX - 1 < NumRealCh)
      RETURN_AAC_BAD_STREAM;
    switch (id) {
    case ID_SCE:
      /* may be there is HE-AAC element */
      state->sbrBlock[cnt_idaac_sbr_element++]->sbr_com.id_aac = ID_SCE;
      NumRealCh++;

      /* Parsing bitstream */
      if (dec_sce_channel_element(&(state_com->m_sce), pBS, state_com->m_audio_object_type) < 0)
        RETURN_AAC_BAD_STREAM;
      tag = (state_com->m_sce).element_instance_tag;
      break;
    case ID_CPE:
      /* may be there is HE-AAC element */
      state->sbrBlock[cnt_idaac_sbr_element++]->sbr_com.id_aac = ID_CPE;
      NumRealCh += 2;

      /* Parsing bitstream */
      if (dec_cpe_channel_element(&(state_com->m_cpe), pBS, state_com->m_audio_object_type) < 0)
        RETURN_AAC_BAD_STREAM;
      tag = (state_com->m_cpe).element_instance_tag;
      break;
    case ID_CCE:
      if (dec_coupling_channel_element(&(state_com->m_cce), pBS, state_com->m_audio_object_type) < 0)
        RETURN_AAC_BAD_STREAM;
      tag = (state_com->m_cce).element_instance_tag;
      break;
    case ID_LFE:
      /* may be there is HE-AAC element */
      if (CH_MAX - 1 < cnt_idaac_sbr_element)
        RETURN_AAC_BAD_STREAM;

      state->sbrBlock[cnt_idaac_sbr_element++]->sbr_com.id_aac = ID_LFE;

      if (cnt_fill_sbr_element > 0) {
        sbrFlagPresentLFE++;

        if ( CH_MAX - 1 < cnt_fill_sbr_element )
          RETURN_AAC_BAD_STREAM;

        cnt_fill_sbr_element++;
      }


      /* Parsing bitstream */
      if (dec_lfe_channel_element(&(state_com->m_lfe), pBS, state_com->m_audio_object_type) < 0)
        RETURN_AAC_BAD_STREAM;
      tag = (state_com->m_lfe).element_instance_tag;
      NumRealCh++;
      break;
    case ID_DSE:
      dec_data_stream_element(&m_data, pBS);
      break;
    case ID_PCE:
      dec_program_config_element(&(state_com->m_pce), pBS);
      state_com->m_is_chmap_valid = 0;
      state_com->m_is_pce_valid = 1;
      break;
    case ID_FIL:
/*
* NOTES:
* (1)SBR FILL ELEMENT there is for SCE & CPE modes only.
* (2)If AOT AAC is MAIN, LC or LTP
* then
*   <SCE> <FIL <EXT_SBR_DATA(SCE)>> // center
*   <CPE> <FIL <EXT_SBR_DATA(CPE)>> // front L/R
*   <CPE> <FIL <EXT_SBR_DATA(CPE)>> // back L/R
*   <LFE> // sub
*   <END> // (end of raw data block)
*
* (3)If AOT AAC is ER LC or ER LTP
* then
*   <SCE> <CPE> <CPE> <LFE> <EXT <SBR(SCE)> <SBR(CPE)> <SBR(CPE)>>
*
* (4) may be more then one FILL ELEMENT, for ex:
*  <SCE> <FILL.. <CPE> <FILL.. <CPE> <FILL..><FILL..> <LFE><FILL..><FILL..><FILL..>
*/
      if ( CH_MAX - 1 < cnt_fill_sbr_element )
        RETURN_AAC_BAD_STREAM;

      state->sbrBlock[cnt_fill_sbr_element]->sbr_com.FreqSbr =
        state_com->m_sampling_frequency * 2;

      if (state->com.m_sampling_frequency_index >= 3)
        state->sbrBlock[cnt_fill_sbr_element]->sbr_com.sbr_freq_indx =
          state->com.m_sampling_frequency_index - 3;

      state->sbrBlock[cnt_fill_sbr_element]->sbr_com.sbrFlagError = 0;

      errSBRParser = dec_fill_element(
                        &(state->sbrBlock[cnt_fill_sbr_element]->sbr_com),
                        &cnt_fill_sbr_element, &m_drc_info, pBS);

      /*************************************************************
       * if there is problem with HE-AAC parser then QUIT
       *************************************************************/
      if ( errSBRParser )
        RETURN_AAC_BAD_STREAM

      break;
    }

    if (ID_DSE > id) {
      if (0 == state_com->m_is_chmap_valid) {
        state_com->m_chmap[id][tag].ch = (short)ch_num;
        state_com->m_elmap[el_num].id = (short)id;
        state_com->m_elmap[el_num].tag = (short)tag;

        if (ID_CCE != id) {
          state_com->m_elmap[el_num].ch = (short)ch_num;
          state_com->m_order[order_counter++] = ch_num;
        } else {
          state_com->m_elmap[el_num].ch = -1;
        }
        el_num++;
        ch_num++;
        if (ID_CPE == id) {
          state_com->m_order[order_counter++] = ch_num;
          ch_num++;
        }
      }
      ch = state_com->m_chmap[id][tag].ch;
      if (ch < 0)
        continue;     /* only parsing */;
    }

    switch (id) {
    case ID_SCE:

      state_com->m_curr_win_shape[ch] = (state_com->m_sce).stream.window_shape;
      state_com->m_curr_win_sequence[ch] = (state_com->m_sce).stream.window_sequence;

      if (0 != (state_com->m_sce).stream.pulse_data_present) {
        ics_apply_pulse_I(&(state_com->m_sce).stream);
      }
      ics_apply_scale_factors(&(state_com->m_sce).stream, state->m_spectrum_data[ch]);
      apply_pns(&(state_com->m_sce).stream, NULL, state->m_spectrum_data[ch], NULL, 1,
                0, NULL, &(state_com->noiseState));
      ics_calc_tns_data(&(state_com->m_sce).stream, &tns_data0);

      if (AOT_AAC_LTP == state_com->m_audio_object_type) {
        state->m_ltp.p_samples_1st_part = state->m_ltp_buf[ch][state_com->m_index_1st];
        state->m_ltp.p_samples_2nd_part = state->m_ltp_buf[ch][state_com->m_index_2nd];
        state->m_ltp.p_samples_3rd_part = state->m_ltp_buf[ch][state_com->m_index_3rd];
        state->m_ltp.prev_windows_shape = state_com->m_prev_win_shape[ch];

        state->m_ltp.p_filterbank_data = &(state->m_filterbank);
        state->m_ltp.p_tns_data = &tns_data0;

        ics_apply_ltp_I(&(state->m_ltp), &(state_com->m_sce).stream, state->m_spectrum_data[ch]);
      }

      if (0 != (state_com->m_sce).stream.tns_data_present) {
        ics_apply_tns_dec_I(&tns_data0, state->m_spectrum_data[ch]);
      }
      break;
    case ID_CPE:

      state_com->m_curr_win_shape[ch] = (state_com->m_cpe).streams[0].window_shape;
      state_com->m_curr_win_sequence[ch] = (state_com->m_cpe).streams[0].window_sequence;
      state_com->m_curr_win_shape[ch + 1] = (state_com->m_cpe).streams[1].window_shape;
      state_com->m_curr_win_sequence[ch + 1] = (state_com->m_cpe).streams[1].window_sequence;

      if (0 != (state_com->m_cpe).streams[0].pulse_data_present) {
        ics_apply_pulse_I(&(state_com->m_cpe).streams[0]);
      }
      if (0 != (state_com->m_cpe).streams[1].pulse_data_present) {
        ics_apply_pulse_I(&(state_com->m_cpe).streams[1]);
      }

      ics_apply_scale_factors(&(state_com->m_cpe).streams[0], state->m_spectrum_data[ch]);