libmpcodecs/ae_faac.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <inttypes.h>
   4 #include <unistd.h>
   5 #include <string.h>
   6 #include <sys/types.h>
   7 #include "m_option.h"
   8 #include "mp_msg.h"
   9 #include "aviheader.h"
  10 #include "libaf/af_format.h"
  11 #include "ms_hdr.h"
  12 #include "muxer.h"
  13 #include <faac.h>
  14 #include "ae.h"
  15
  16
  17 static faacEncHandle faac;
  18 static faacEncConfigurationPtr config = NULL;
  19 static int
  20         param_bitrate = 128,
  21         param_quality = 0,
  22         param_object_type = MAIN,
  23         param_mpeg = 2,
  24         param_tns = 0,
  25         param_raw = 0,
  26         param_cutoff = 0,
  27         param_format = 16,
  28         param_debug = 0;
  29
  30 static int enc_frame_size = 0, divisor;
  31 static unsigned long samples_input, max_bytes_output;
  32 static unsigned char *decoder_specific_buffer = NULL;
  33 static unsigned long decoder_specific_len = 0;
  34
  35 m_option_t faacopts_conf[] = {
  36         {"br", &param_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
  37         {"quality", &param_quality, CONF_TYPE_INT, CONF_RANGE, 0, 1000, NULL},
  38         {"object", &param_object_type, CONF_TYPE_INT, CONF_RANGE, MAIN, LTP, NULL},
  39         {"mpeg", &param_mpeg, CONF_TYPE_INT, CONF_RANGE, 2, 4, NULL},
  40         {"tns", &param_tns, CONF_TYPE_FLAG, 0, 0, 1, NULL},
  41         {"cutoff", &param_cutoff, CONF_TYPE_INT, 0, 0, 0, NULL},
  42         {"format", &param_format, CONF_TYPE_INT, 0, 0, 0, NULL},
  43         {"raw", &param_raw, CONF_TYPE_FLAG, 0, 0, 1, NULL},
  44         {"debug", &param_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
  45         {NULL, NULL, 0, 0, 0, 0, NULL}
  46 };
  47
  48
  49 static int bind_faac(audio_encoder_t *encoder, muxer_stream_t *mux_a)
  50 {
  51         mux_a->wf = calloc(1, sizeof(WAVEFORMATEX) + decoder_specific_len + 256);
  52         mux_a->wf->wFormatTag = 0x706D;
  53         mux_a->wf->nChannels = encoder->params.channels;
  54         mux_a->h.dwSampleSize=0; // VBR
  55         mux_a->h.dwRate=encoder->params.sample_rate;
  56         mux_a->h.dwScale=encoder->params.samples_per_frame;
  57         mux_a->wf->nSamplesPerSec=mux_a->h.dwRate;
  58         mux_a->wf->nAvgBytesPerSec = encoder->params.bitrate / 8;
  59
  60         mux_a->wf->nBlockAlign = mux_a->h.dwScale;
  61         mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
  62         mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
  63
  64         mux_a->wf->cbSize = decoder_specific_len;
  65         mux_a->wf->wBitsPerSample = 0; /* does not apply */
  66         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
  67         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
  68         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
  69         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
  70         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
  71
  72         // Fix allocation
  73         mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
  74
  75         if(config->inputFormat == FAAC_INPUT_FLOAT)
  76                 encoder->input_format = AF_FORMAT_FLOAT_NE;
  77         else if(config->inputFormat == FAAC_INPUT_32BIT)
  78                 encoder->input_format = AF_FORMAT_S32_NE;
  79         else
  80                 encoder->input_format = AF_FORMAT_S16_NE;
  81
  82         encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
  83         encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
  84
  85         if(decoder_specific_buffer && decoder_specific_len)
  86                 memcpy(mux_a->wf + 1, decoder_specific_buffer, decoder_specific_len);
  87
  88         return 1;
  89 }
  90
  91 static int get_frame_size(audio_encoder_t *encoder)
  92 {
  93         int sz = enc_frame_size;
  94         enc_frame_size = 0;
  95         return sz;
  96 }
  97
  98 static int encode_faac(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
  99 {
 100         // len is divided by the number of bytes per sample
 101         enc_frame_size = faacEncEncode(faac,  (int32_t*) src,  len / divisor, dest, max_size);
 102
 103         return enc_frame_size;
 104 }
 105
 106 int close_faac(audio_encoder_t *encoder)
 107 {
 108         return 1;
 109 }
 110
 111 int mpae_init_faac(audio_encoder_t *encoder)
 112 {
 113         if(encoder->params.channels < 1 || encoder->params.channels > 6 || (param_mpeg != 2 && param_mpeg != 4))
 114         {
 115                 mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, unsupported number of channels: %d, or mpeg version: %d, exit\n", encoder->params.channels, param_mpeg);
 116                 return 0;
 117         }
 118
 119         faac = faacEncOpen(encoder->params.sample_rate, encoder->params.channels, &samples_input, &max_bytes_output);
 120         if(!faac)
 121         {
 122                 mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, couldn't init, exit\n");
 123                 return 0;
 124         }
 125         mp_msg(MSGT_MENCODER, MSGL_V, "AE_FAAC, sample_input: %lu, max_bytes_output: %lu\n", samples_input, max_bytes_output);
 126         config = faacEncGetCurrentConfiguration(faac);
 127         if(!config)
 128         {
 129                 mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, couldn't get init configuration, exit\n");
 130                 return 0;
 131         }
 132
 133         param_bitrate *= 1000;
 134         if(param_quality)
 135                 config->quantqual = param_quality;
 136         else
 137                 config->bitRate = param_bitrate / encoder->params.channels;
 138
 139         if(param_format==33)
 140         {
 141                 config->inputFormat = FAAC_INPUT_FLOAT;
 142                 divisor = 4;
 143         }
 144         else if(param_format==32)
 145         {
 146                 config->inputFormat = FAAC_INPUT_32BIT;
 147                 divisor = 4;
 148         }
 149         else
 150         {
 151                 config->inputFormat = FAAC_INPUT_16BIT;
 152                 divisor = 2;
 153         }
 154         config->outputFormat = param_raw ? 0 : 1; // 1 is ADTS
 155         config->aacObjectType = param_object_type;
 156         config->mpegVersion = (param_mpeg == 4 ? MPEG4 : MPEG2);
 157         config->useTns = param_tns;
 158         config->allowMidside = 1;
 159         config->shortctl = SHORTCTL_NORMAL;
 160         param_cutoff = param_cutoff ? param_cutoff : encoder->params.sample_rate / 2;
 161         if(param_cutoff > encoder->params.sample_rate / 2)
 162                 param_cutoff = encoder->params.sample_rate / 2;
 163         config->bandWidth = param_cutoff;
 164         if(encoder->params.channels == 6)
 165                 config->useLfe = 1;
 166
 167         if(!faacEncSetConfiguration(faac, config))
 168         {
 169                 mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, counldn't set specified parameters, exiting\n");
 170                 return 0;
 171         }
 172
 173         if(param_raw)
 174                 faacEncGetDecoderSpecificInfo(faac, &decoder_specific_buffer, &decoder_specific_len);
 175         else
 176                 decoder_specific_len = 0;
 177
 178         encoder->params.bitrate = param_bitrate;
 179         encoder->params.samples_per_frame = 1024;
 180         encoder->decode_buffer_size =  divisor * samples_input; //samples * 16 bits_per_sample
 181
 182         encoder->bind = bind_faac;
 183         encoder->get_frame_size = get_frame_size;
 184         encoder->encode = encode_faac;
 185         encoder->close = close_faac;
 186
 187         return 1;
 188 }