libmpcodecs/ae_twolame.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 "libmpdemux/aviheader.h"
  10 #include "libaf/af_format.h"
  11 #include "libmpdemux/ms_hdr.h"
  12 #include "stream/stream.h"
  13 #include "libmpdemux/muxer.h"
  14 #include "ae_twolame.h"
  15 #include "libmpdemux/mp3_hdr.h"
  16
  17
  18 static int
  19     param_bitrate = 192,
  20     param_psy = 3,
  21     param_maxvbr = 0,
  22     param_errprot = 0,
  23     param_debug = 0;
  24
  25 static float param_vbr = 0;
  26 static char *param_mode = "stereo";
  27
  28 m_option_t twolameopts_conf[] = {
  29         {"br", &param_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
  30         {"mode", &param_mode, CONF_TYPE_STRING, 0, 0, 0, NULL},
  31         {"psy", &param_psy, CONF_TYPE_INT, CONF_RANGE, -1, 4, NULL},
  32         {"vbr", &param_vbr, CONF_TYPE_FLOAT, CONF_RANGE, -50, 50, NULL},
  33         {"maxvbr", &param_maxvbr, CONF_TYPE_INT, 0, 0, 0, NULL},
  34         {"errprot", &param_errprot, CONF_TYPE_INT, CONF_RANGE, 0, 1, NULL},
  35         {"debug", &param_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
  36         {NULL, NULL, 0, 0, 0, 0, NULL}
  37 };
  38
  39
  40 static int bind_twolame(audio_encoder_t *encoder, muxer_stream_t *mux_a)
  41 {
  42         mpae_twolame_ctx *ctx = (mpae_twolame_ctx *) encoder->priv;
  43
  44         mux_a->wf = malloc(sizeof(WAVEFORMATEX)+256);
  45         mux_a->wf->wFormatTag = 0x50;
  46         mux_a->wf->nChannels = encoder->params.channels;
  47         mux_a->wf->nSamplesPerSec = encoder->params.sample_rate;
  48         mux_a->wf->nAvgBytesPerSec = encoder->params.bitrate / 8;
  49
  50         if(ctx->vbr || ((mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame) % mux_a->wf->nSamplesPerSec))
  51         {
  52                 mux_a->h.dwScale = encoder->params.samples_per_frame;
  53                 mux_a->h.dwRate = encoder->params.sample_rate;
  54                 mux_a->h.dwSampleSize = 0; // Blocksize not constant
  55         }
  56         else
  57         {
  58                 mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame)/ mux_a->wf->nSamplesPerSec; /* for cbr */
  59                 mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
  60                 mux_a->h.dwSampleSize = mux_a->h.dwScale;
  61         }
  62         mux_a->wf->nBlockAlign = mux_a->h.dwScale;
  63         mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
  64         mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
  65
  66         mux_a->wf->cbSize = 0; //12;
  67         mux_a->wf->wBitsPerSample = 0; /* does not apply */
  68         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
  69         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
  70         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
  71         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
  72         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
  73
  74         // Fix allocation
  75         mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
  76
  77         encoder->input_format = AF_FORMAT_S16_NE;
  78         encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
  79         encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
  80
  81         return 1;
  82 }
  83
  84 static int encode_twolame(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
  85 {
  86         mpae_twolame_ctx *ctx = (mpae_twolame_ctx *)encoder->priv;
  87         int ret_size = 0, r2;
  88
  89         len /= (2*encoder->params.channels);
  90         ret_size = twolame_encode_buffer_interleaved(ctx->twolame_ctx, src, len, dest, max_size);
  91         r2 = mp_decode_mp3_header(dest);
  92         mp_msg(MSGT_MENCODER, MSGL_DBG2, "\nSIZE: %d, max: %d, r2: %d\n", ret_size, max_size, r2);
  93         if(r2 > 0)
  94                 ret_size = r2;
  95         return ret_size;
  96 }
  97
  98 int close_twolame(audio_encoder_t *encoder)
  99 {
 100         free(encoder->priv);
 101         return 1;
 102 }
 103
 104 static int get_frame_size(audio_encoder_t *encoder)
 105 {
 106         int sz;
 107         if(encoder->stream->buffer_len < 4)
 108                 return 0;
 109         sz = mp_decode_mp3_header(encoder->stream->buffer);
 110         if(sz <= 0)
 111                 return 0;
 112         return sz;
 113 }
 114
 115
 116 int mpae_init_twolame(audio_encoder_t *encoder)
 117 {
 118         int mode;
 119         mpae_twolame_ctx *ctx = NULL;
 120
 121         if(encoder->params.channels == 1)
 122         {
 123                 mp_msg(MSGT_MENCODER, MSGL_INFO, "ae_twolame, 1 audio channel, forcing mono mode\n");
 124                 mode = TWOLAME_MONO;
 125         }
 126         else if(encoder->params.channels == 2)
 127         {
 128                 if(! strcasecmp(param_mode, "dual"))
 129                         mode = TWOLAME_DUAL_CHANNEL;
 130                 else if(! strcasecmp(param_mode, "jstereo"))
 131                         mode = TWOLAME_JOINT_STEREO;
 132                 else if(! strcasecmp(param_mode, "stereo"))
 133                         mode = TWOLAME_STEREO;
 134                 else
 135                 {
 136                         mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, unknown mode %s, exiting\n", param_mode);
 137                 }
 138         }
 139         else
 140                 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, Twolame can't encode > 2 channels, exiting\n");
 141
 142         ctx = (mpae_twolame_ctx *) calloc(1, sizeof(mpae_twolame_ctx));
 143         if(ctx == NULL)
 144         {
 145                 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't alloc a %d bytes context, exiting\n", sizeof(mpae_twolame_ctx));
 146                 return 0;
 147         }
 148
 149         ctx->twolame_ctx = twolame_init();
 150         if(ctx->twolame_ctx == NULL)
 151         {
 152                 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't initial parameters from libtwolame, exiting\n");
 153                 free(ctx);
 154                 return 0;
 155         }
 156         ctx->vbr = 0;
 157
 158         if(twolame_set_num_channels(ctx->twolame_ctx, encoder->params.channels) != 0)
 159                 return 0;
 160         if(twolame_set_mode(ctx->twolame_ctx, mode) != 0)
 161                 return 0;
 162
 163         if(twolame_set_in_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
 164                 return 0;
 165
 166         if(twolame_set_out_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
 167                 return 0;
 168
 169         if(encoder->params.sample_rate < 32000)
 170                 twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG2);
 171         else
 172                 twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG1);
 173
 174         if(twolame_set_psymodel(ctx->twolame_ctx, param_psy) != 0)
 175                 return 0;
 176
 177         if(twolame_set_bitrate(ctx->twolame_ctx, param_bitrate) != 0)
 178                 return 0;
 179
 180         if(param_errprot)
 181                 if(twolame_set_error_protection(ctx->twolame_ctx, TRUE) != 0)
 182                         return 0;
 183
 184         if(param_vbr != 0)
 185         {
 186                 if(twolame_set_VBR(ctx->twolame_ctx, TRUE) != 0)
 187                         return 0;
 188                 if(twolame_set_VBR_q(ctx->twolame_ctx, param_vbr) != 0)
 189                         return 0;
 190                 if(twolame_set_padding(ctx->twolame_ctx, FALSE) != 0)
 191                         return 0;
 192                 if(param_maxvbr)
 193                 {
 194                         if(twolame_set_VBR_max_bitrate_kbps(ctx->twolame_ctx, param_maxvbr) != 0)
 195                                 return 0;
 196                 }
 197                 ctx->vbr = 1;
 198         }
 199
 200         if(twolame_set_verbosity(ctx->twolame_ctx, param_debug) != 0)
 201                 return 0;
 202
 203         if(twolame_init_params(ctx->twolame_ctx) != 0)
 204                 return 0;
 205
 206         encoder->params.bitrate = param_bitrate * 1000;
 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_twolame;
 212         encoder->get_frame_size = get_frame_size;
 213         encoder->encode = encode_twolame;
 214         encoder->close = close_twolame;
 215
 216         return 1;
 217 }
 218