text: #include <stdio.h>
  #include <stdlib.h>
  #include <inttypes.h>
  #include <unistd.h>
  #include <string.h>
  #include <sys/types.h>
  #include "m_option.h"
  #include "mp_msg.h"
  #include "libmpdemux/aviheader.h"
  #include "libmpdemux/ms_hdr.h"
  #include "stream/stream.h"
  #include "libmpdemux/muxer.h"
  #include "help_mp.h"
  #include "ae_pcm.h"
  #include "libaf/af_format.h"
  #include "libmpdemux/mp3_hdr.h"
  
  #undef CDECL
  #include <lame/lame.h>
  
  lame_global_flags *lame;
  static int lame_param_quality=0; // best
  static int lame_param_algqual=5; // same as old default
  static int lame_param_vbr=vbr_default;
  static int lame_param_mode=-1; // unset
  static int lame_param_padding=-1; // unset
  static int lame_param_br=-1; // unset
  static int lame_param_ratio=-1; // unset
  static float lame_param_scale=-1; // unset
  static int lame_param_lowpassfreq = 0; //auto
  static int lame_param_highpassfreq = 0; //auto
  static int lame_param_free_format = 0; //disabled
  static int lame_param_br_min = 0; //not specified
  static int lame_param_br_max = 0; //not specified
  
  #ifdef HAVE_MP3LAME_PRESET
  int lame_param_fast=0; // unset
  static char* lame_param_preset=NULL; // unset
  static int  lame_presets_set( lame_t gfp, int fast, int cbr, const char* preset_name );
  static void  lame_presets_longinfo_dm ( FILE* msgfp );
  #endif
  
  
  m_option_t lameopts_conf[]={
  	{"q", &lame_param_quality, CONF_TYPE_INT, CONF_RANGE, 0, 9, NULL},
  	{"aq", &lame_param_algqual, CONF_TYPE_INT, CONF_RANGE, 0, 9, NULL},
  	{"vbr", &lame_param_vbr, CONF_TYPE_INT, CONF_RANGE, 0, vbr_max_indicator, NULL},
  	{"cbr", &lame_param_vbr, CONF_TYPE_FLAG, 0, 0, 0, NULL},
  	{"abr", &lame_param_vbr, CONF_TYPE_FLAG, 0, 0, vbr_abr, NULL},
  	{"mode", &lame_param_mode, CONF_TYPE_INT, CONF_RANGE, 0, MAX_INDICATOR, NULL},
  	{"padding", &lame_param_padding, CONF_TYPE_INT, CONF_RANGE, 0, PAD_MAX_INDICATOR, NULL},
  	{"br", &lame_param_br, CONF_TYPE_INT, CONF_RANGE, 0, 1024, NULL},
  	{"ratio", &lame_param_ratio, CONF_TYPE_INT, CONF_RANGE, 0, 100, NULL},
  	{"vol", &lame_param_scale, CONF_TYPE_FLOAT, CONF_RANGE, 0, 10, NULL},
  	{"lowpassfreq",&lame_param_lowpassfreq, CONF_TYPE_INT, CONF_RANGE, -1, 48000,0},
  	{"highpassfreq",&lame_param_highpassfreq, CONF_TYPE_INT, CONF_RANGE, -1, 48000,0},
  	{"nofree", &lame_param_free_format, CONF_TYPE_FLAG, 0, 0, 0, NULL},
  	{"free", &lame_param_free_format, CONF_TYPE_FLAG, 0, 0, 1, NULL},
  	{"br_min", &lame_param_br_min, CONF_TYPE_INT, CONF_RANGE, 0, 1024, NULL},
  	{"br_max", &lame_param_br_max, CONF_TYPE_INT, CONF_RANGE, 0, 1024, NULL},
  #ifdef HAVE_MP3LAME_PRESET
  	{"fast", &lame_param_fast, CONF_TYPE_FLAG, 0, 0, 1, NULL},
  	{"preset", &lame_param_preset, CONF_TYPE_STRING, 0, 0, 0, NULL},
  #else
  	{"fast", "MPlayer was built without -lameopts fast support (requires libmp3lame >=3.92).\n", CONF_TYPE_PRINT, CONF_NOCFG, 0, 0, NULL},
  	{"preset", "MPlayer was built without -lameopts preset support (requires libmp3lame >=3.92).\n", CONF_TYPE_PRINT, CONF_NOCFG, 0, 0, NULL},
  #endif
  	{"help", MSGTR_MEncoderMP3LameHelp, CONF_TYPE_PRINT, CONF_NOCFG, 0, 0, NULL},
  	{NULL, NULL, 0, 0, 0, 0, NULL}
  };
  
  
  static int pass;
  
  static int bind_lame(audio_encoder_t *encoder, muxer_stream_t *mux_a)
  {
      mp_msg(MSGT_MENCODER, MSGL_INFO, MSGTR_MP3AudioSelected);
      mux_a->h.dwSampleSize=0; // VBR
      mux_a->h.dwRate=encoder->params.sample_rate;
      mux_a->h.dwScale=encoder->params.samples_per_frame; // samples/frame
      if(sizeof(MPEGLAYER3WAVEFORMAT)!=30) mp_msg(MSGT_MENCODER,MSGL_WARN,MSGTR_MP3WaveFormatSizeNot30,sizeof(MPEGLAYER3WAVEFORMAT));
      mux_a->wf=malloc(sizeof(MPEGLAYER3WAVEFORMAT)); // should be 30
      mux_a->wf->wFormatTag=0x55; // MP3
      mux_a->wf->nChannels= (lame_param_mode<0) ? encoder->params.channels : ((lame_param_mode==3) ? 1 : 2);
      mux_a->wf->nSamplesPerSec=mux_a->h.dwRate;
      if(! lame_param_vbr)
          mux_a->wf->nAvgBytesPerSec=lame_param_br * 125;
      else
          mux_a->wf->nAvgBytesPerSec=192000/8; // FIXME!
      mux_a->wf->nBlockAlign=encoder->params.samples_per_frame; // required for l3codeca.acm + WMP 6.4
      mux_a->wf->wBitsPerSample=0; //16;
      // from NaNdub:  (requires for l3codeca.acm)
      mux_a->wf->cbSize=12;
      ((MPEGLAYER3WAVEFORMAT*)(mux_a->wf))->wID=1;
      ((MPEGLAYER3WAVEFORMAT*)(mux_a->wf))->fdwFlags=2;
      ((MPEGLAYER3WAVEFORMAT*)(mux_a->wf))->nBlockSize=encoder->params.samples_per_frame; // ???
      ((MPEGLAYER3WAVEFORMAT*)(mux_a->wf))->nFramesPerBlock=1;
      ((MPEGLAYER3WAVEFORMAT*)(mux_a->wf))->nCodecDelay=0;
      
      encoder->input_format = AF_FORMAT_S16_NE;
      encoder->min_buffer_size = 4608;
      encoder->max_buffer_size = mux_a->h.dwRate * mux_a->wf->nChannels * 2;
      
      return 1;
  }
  
  #define min(a, b) ((a) <= (b) ? (a) : (b))
  
  static int get_frame_size(audio_encoder_t *encoder)
  {
      int sz;
      if(encoder->stream->buffer_len < 4)
          return 0;
      sz = mp_decode_mp3_header(encoder->stream->buffer);
      if(sz <= 0)
          return 0;
      return sz;
  }
  
  static int encode_lame(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
  {
      int n = 0;
      if(encoder->params.channels == 1)
          n = lame_encode_buffer(lame, (short *)src, (short *)src, len/2, dest, max_size);
      else
          n = lame_encode_buffer_interleaved(lame,(short *)src, len/4, dest, max_size);
  
      return (n < 0 ? 0 : n);
  }
  
  
  static int close_lame(audio_encoder_t *encoder)
  {
      return 1;
  }
  
  static void fixup(audio_encoder_t *encoder)
  {
      // fixup CBR mp3 audio header:
      if(!lame_param_vbr) {
          encoder->stream->h.dwSampleSize=1;
          ((MPEGLAYER3WAVEFORMAT*)(encoder->stream->wf))->nBlockSize=
              (encoder->stream->size+(encoder->stream->h.dwLength>>1))/encoder->stream->h.dwLength;
          encoder->stream->h.dwLength=encoder->stream->size;
          encoder->stream->h.dwRate=encoder->stream->wf->nAvgBytesPerSec;
          encoder->stream->h.dwScale=1;
          encoder->stream->wf->nBlockAlign=1;
          mp_msg(MSGT_MENCODER, MSGL_V, MSGTR_CBRAudioByterate,
              encoder->stream->h.dwRate,((MPEGLAYER3WAVEFORMAT*)(encoder->stream->wf))->nBlockSize);
      }
  }
  
  int mpae_init_lame(audio_encoder_t *encoder)
  {
      encoder->params.bitrate = lame_param_br * 125;
      encoder->params.samples_per_frame = encoder->params.sample_rate < 32000 ? 576 : 1152;
      encoder->decode_buffer_size = 2304;
  
      lame=lame_init();
      lame_set_bWriteVbrTag(lame,0);
      lame_set_in_samplerate(lame,encoder->params.sample_rate);
      //lame_set_in_samplerate(lame,sh_audio->samplerate); // if resampling done by lame
      lame_set_num_channels(lame,encoder->params.channels);
      lame_set_out_samplerate(lame,encoder->params.sample_rate);
      lame_set_quality(lame,lame_param_algqual); // 0 = best q
      if(lame_param_free_format) lame_set_free_format(lame,1);
      if(lame_param_vbr){  // VBR:
          lame_set_VBR(lame,lame_param_vbr); // vbr mode
          lame_set_VBR_q(lame,lame_param_quality); // 0 = best vbr q  5=~128k
          if(lame_param_br>0) lame_set_VBR_mean_bitrate_kbps(lame,lame_param_br);
          if(lame_param_br_min>0) lame_set_VBR_min_bitrate_kbps(lame,lame_param_br_min);
          if(lame_param_br_max>0) lame_set_VBR_max_bitrate_kbps(lame,lame_param_br_max);
      } else {    // CBR:
          if(lame_param_br>0) lame_set_brate(lame,lame_param_br);
      }
      if(lame_param_mode>=0) lame_set_mode(lame,lame_param_mode); // j-st
      if(lame_param_ratio>0) lame_set_compression_ratio(lame,lame_param_ratio);
      if(lame_param_scale>0) {
          mp_msg(MSGT_MENCODER, MSGL_V, MSGTR_SettingAudioInputGain, lame_param_scale);
          lame_set_scale(lame,lame_param_scale);
      }
      if(lame_param_lowpassfreq>=-1) lame_set_lowpassfreq(lame,lame_param_lowpassfreq);
      if(lame_param_highpassfreq>=-1) lame_set_highpassfreq(lame,lame_param_highpassfreq);
  #ifdef HAVE_MP3LAME_PRESET
      if(lame_param_preset != NULL) {
          mp_msg(MSGT_MENCODER, MSGL_V, MSGTR_LamePresetEquals,lame_param_preset);
          if(lame_presets_set(lame,lame_param_fast, (lame_param_vbr==0), lame_param_preset) < 0)
              return 0;
      }
  #endif
      if(lame_init_params(lame) == -1) {
          mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LameCantInit); 
          return 0;
      }
      if( mp_msg_test(MSGT_MENCODER,MSGL_V) ) {
          lame_print_config(lame);
          lame_print_internals(lame);
      }
      
      encoder->bind = bind_lame;
      encoder->get_frame_size = get_frame_size;
      encoder->encode = encode_lame;
      encoder->fixup = fixup;
      encoder->close = close_lame;
      return 1;
  }
  
  #ifdef HAVE_MP3LAME_PRESET
  /* lame_presets_set 
     taken out of presets_set in lame-3.93.1/frontend/parse.c and modified */
  static int  lame_presets_set( lame_t gfp, int fast, int cbr, const char* preset_name )
  {
      int mono = 0;
  
      if (strcmp(preset_name, "help") == 0) {
          mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LameVersion, get_lame_version(), get_lame_url());
          mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LamePresetsLongInfo);
          return -1;
      }
  
      //aliases for compatibility with old presets
  
      if (strcmp(preset_name, "phone") == 0) {
          preset_name = "16";
          mono = 1;
      }
      if ( (strcmp(preset_name, "phon+") == 0) ||
           (strcmp(preset_name, "lw") == 0) ||
           (strcmp(preset_name, "mw-eu") == 0) ||
           (strcmp(preset_name, "sw") == 0)) {
          preset_name = "24";
          mono = 1;
      }
      if (strcmp(preset_name, "mw-us") == 0) {
          preset_name = "40";
          mono = 1;
      }
      if (strcmp(preset_name, "voice") == 0) {
          preset_name = "56";
          mono = 1;
      }
      if (strcmp(preset_name, "fm") == 0) {
          preset_name = "112";
      }
      if ( (strcmp(preset_name, "radio") == 0) ||
           (strcmp(preset_name, "tape") == 0)) {
          preset_name = "112";
      }
      if (strcmp(preset_name, "hifi") == 0) {
          preset_name = "160";
      }
      if (strcmp(preset_name, "cd") == 0) {
          preset_name = "192";
      }
      if (strcmp(preset_name, "studio") == 0) {
          preset_name = "256";
      }
  
  #ifdef HAVE_MP3LAME_PRESET_MEDIUM
      if (strcmp(preset_name, "medium") == 0) {
          if (fast > 0)
             lame_set_preset(gfp, MEDIUM_FAST);
          else
             lame_set_preset(gfp, MEDIUM);
  
          return 0;
      }
  #endif
      
      if (strcmp(preset_name, "standard") == 0) {
          if (fast > 0)
             lame_set_preset(gfp, STANDARD_FAST);
          else
             lame_set_preset(gfp, STANDARD);
  
          return 0;
      }
      
      else if (strcmp(preset_name, "extreme") == 0){
          if (fast > 0)
             lame_set_preset(gfp, EXTREME_FAST);
          else
             lame_set_preset(gfp, EXTREME);
  
          return 0;
      }
      					
      else if (((strcmp(preset_name, "insane") == 0) || 
                (strcmp(preset_name, "320"   ) == 0))   && (fast < 1)) {
  
          lame_set_preset(gfp, INSANE);
   
          return 0;
      }
  
      // Generic ABR Preset
      if (((atoi(preset_name)) > 0) &&  (fast < 1)) {
          if ((atoi(preset_name)) >= 8 && (atoi(preset_name)) <= 320){
              lame_set_preset(gfp, atoi(preset_name));
  
              if (cbr == 1 )
                  lame_set_VBR(gfp, vbr_off);
  
              if (mono == 1 ) {
                  lame_set_mode(gfp, MONO);
              }
  
              return 0;
  
          }
          else {
              mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LameVersion, get_lame_version(), get_lame_url());
              mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_InvalidBitrateForLamePreset);
              return -1;
          }
      }
  
      mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LameVersion, get_lame_version(), get_lame_url());
      mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_InvalidLamePresetOptions);
      return -1;
  }
  #endif
  