libmpcodecs/ae_toolame.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 "ae_toolame.h"
  14 #include "libmpdemux/mp3_hdr.h"
  15
  16
  17 static int
  18     param_bitrate = 192,
  19     param_psy = 3,
  20     param_maxvbr = 0,
  21     param_errprot = 0,
  22     param_debug = 0;
  23
  24 static float param_vbr = 0;
  25 static char *param_mode = "stereo";
  26
  27 m_option_t toolameopts_conf[] = {
  28         {"br", &param_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
  29         {"mode", &param_mode, CONF_TYPE_STRING, 0, 0, 0, NULL},
  30         {"psy", &param_psy, CONF_TYPE_INT, CONF_RANGE, -1, 4, NULL},
  31         {"vbr", &param_vbr, CONF_TYPE_FLOAT, CONF_RANGE, -50, 50, NULL},
  32         {"maxvbr", &param_maxvbr, CONF_TYPE_INT, 0, 0, 0, NULL},
  33         {"errprot", &param_errprot, CONF_TYPE_INT, CONF_RANGE, 0, 1, NULL},
  34         {"debug", &param_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
  35         {NULL, NULL, 0, 0, 0, 0, NULL}
  36 };
  37
  38
  39 static int bind_toolame(audio_encoder_t *encoder, muxer_stream_t *mux_a)
  40 {
  41         mpae_toolame_ctx *ctx = (mpae_toolame_ctx *) encoder->priv;
  42
  43         mux_a->wf = malloc(sizeof(WAVEFORMATEX)+256);
  44         mux_a->wf->wFormatTag = 0x50;
  45         mux_a->wf->nChannels = encoder->params.channels;
  46         mux_a->wf->nSamplesPerSec = encoder->params.sample_rate;
  47         mux_a->wf->nAvgBytesPerSec = 125 * encoder->params.bitrate;
  48
  49         if(ctx->vbr || ((mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame) % mux_a->wf->nSamplesPerSec))
  50         {
  51                 mux_a->h.dwScale = encoder->params.samples_per_frame;
  52                 mux_a->h.dwRate = encoder->params.sample_rate;
  53                 mux_a->h.dwSampleSize = 0; // Blocksize not constant
  54         }
  55         else
  56         {
  57                 mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame)/ mux_a->wf->nSamplesPerSec; /* for cbr */
  58                 mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
  59                 mux_a->h.dwSampleSize = mux_a->h.dwScale;
  60         }
  61         mux_a->wf->nBlockAlign = mux_a->h.dwScale;
  62         mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
  63         mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
  64
  65         mux_a->wf->cbSize = 0; //12;
  66         mux_a->wf->wBitsPerSample = 0; /* does not apply */
  67         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
  68         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
  69         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
  70         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
  71         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
  72
  73         // Fix allocation
  74         mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
  75
  76         encoder->input_format = AF_FORMAT_S16_NE;
  77         encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
  78         encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
  79
  80         return 1;
  81 }
  82
  83 static int encode_toolame(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
  84 {
  85         mpae_toolame_ctx *ctx = (mpae_toolame_ctx *)encoder->priv;
  86         int ret_size = 0, r2, i, nsamples;
  87         int16_t *buffer;
  88
  89         nsamples = len / (2*encoder->params.channels);
  90         buffer = (uint16_t *) src;
  91         for(i = 0; i < nsamples; i++)
  92         {
  93             ctx->left_pcm[i] = buffer[ctx->channels * i];
  94             ctx->right_pcm[i] = buffer[(ctx->channels * i) + (ctx->channels - 1)];
  95         }
  96
  97         toolame_encode_buffer(ctx->toolame_ctx, ctx->left_pcm, ctx->right_pcm, nsamples, dest, max_size, &ret_size);
  98         r2 = mp_decode_mp3_header(dest);
  99         mp_msg(MSGT_MENCODER, MSGL_DBG2, "\nSIZE: %d, max: %d, r2: %d\n", ret_size, max_size, r2);
 100         if(r2 > 0)
 101                 ret_size = r2;
 102         return ret_size;
 103 }
 104
 105 int close_toolame(audio_encoder_t *encoder)
 106 {
 107         free(encoder->priv);
 108         return 1;
 109 }
 110
 111 static int get_frame_size(audio_encoder_t *encoder)
 112 {
 113         int sz;
 114         if(encoder->stream->buffer_len < 4)
 115                 return 0;
 116         sz = mp_decode_mp3_header(encoder->stream->buffer);
 117         if(sz <= 0)
 118                 return 0;
 119         return sz;
 120 }
 121
 122
 123 int mpae_init_toolame(audio_encoder_t *encoder)
 124 {
 125         int mode;
 126         mpae_toolame_ctx *ctx = NULL;
 127
 128         if(encoder->params.channels == 1)
 129         {
 130                 mp_msg(MSGT_MENCODER, MSGL_INFO, "ae_toolame, 1 audio channel, forcing mono mode\n");
 131                 mode = MPG_MD_MONO;
 132         }
 133         else if(encoder->params.channels == 2)
 134         {
 135                 if(! strcasecmp(param_mode, "dual"))
 136                         mode = MPG_MD_DUAL_CHANNEL;
 137                 else if(! strcasecmp(param_mode, "jstereo"))
 138                         mode = MPG_MD_JOINT_STEREO;
 139                 else if(! strcasecmp(param_mode, "stereo"))
 140                         mode = MPG_MD_STEREO;
 141                 else
 142                 {
 143                         mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_toolame, unknown mode %s, exiting\n", param_mode);
 144                 }
 145         }
 146         else
 147                 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_toolame, Toolame can't encode > 2 channels, exiting\n");
 148
 149         ctx = (mpae_toolame_ctx *) calloc(1, sizeof(mpae_toolame_ctx));
 150         if(ctx == NULL)
 151         {
 152                 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_toolame, couldn't alloc a %d bytes context, exiting\n", sizeof(mpae_toolame_ctx));
 153                 return 0;
 154         }
 155
 156         ctx->toolame_ctx = toolame_init();
 157         if(ctx->toolame_ctx == NULL)
 158         {
 159                 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_toolame, couldn't initial parameters from libtoolame, exiting\n");
 160                 free(ctx);
 161                 return 0;
 162         }
 163         ctx->vbr = 0;
 164         ctx->channels = encoder->params.channels;
 165         ctx->srate = encoder->params.sample_rate;
 166
 167         if(toolame_setMode(ctx->toolame_ctx, mode) != 0)
 168                 return 0;
 169
 170         if(toolame_setPsymodel(ctx->toolame_ctx, param_psy) != 0)
 171                 return 0;
 172
 173         if(toolame_setSampleFreq(ctx->toolame_ctx, encoder->params.sample_rate) != 0)
 174                 return 0;
 175
 176         if(toolame_setBitrate(ctx->toolame_ctx, param_bitrate) != 0)
 177                 return 0;
 178
 179         if(param_errprot)
 180                 if(toolame_setErrorProtection(ctx->toolame_ctx, TRUE) != 0)
 181                         return 0;
 182
 183         if(param_vbr != 0)
 184         {
 185                 if(toolame_setVBR(ctx->toolame_ctx, TRUE) != 0)
 186                         return 0;
 187                 if(toolame_setVBRLevel(ctx->toolame_ctx, param_vbr) != 0)
 188                         return 0;
 189                 if(toolame_setPadding(ctx->toolame_ctx, FALSE) != 0)
 190                         return 0;
 191                 if(param_maxvbr)
 192                 {
 193                         if(toolame_setVBRUpperBitrate(ctx->toolame_ctx, param_maxvbr) != 0)
 194                                 return 0;
 195                 }
 196                 ctx->vbr = 1;
 197         }
 198
 199         if(toolame_setVerbosity(ctx->toolame_ctx, param_debug) != 0)
 200                 return 0;
 201
 202         if(toolame_init_params(ctx->toolame_ctx) != 0)
 203                 return 0;
 204
 205         ctx->bitrate = param_bitrate;
 206         encoder->params.bitrate = ctx->bitrate;
 207         encoder->params.samples_per_frame = 1152;
 208         encoder->priv = ctx;
 209         encoder->decode_buffer_size = 1152 * 2 * encoder->params.channels;
 210
 211         encoder->bind = bind_toolame;
 212         encoder->get_frame_size = get_frame_size;
 213         encoder->encode = encode_toolame;
 214         encoder->close = close_toolame;
 215
 216         return 1;
 217 }
 218