* Sample rate convertion for both audio and video
* Copyright (c) 2000 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
}
}
-ReSampleContext *audio_resample_init(int output_channels, int input_channels,
+ReSampleContext *audio_resample_init(int output_channels, int input_channels,
int output_rate, int input_rate)
{
ReSampleContext *s;
- int i;
-
+
if ( input_channels > 2)
{
- av_log(NULL, AV_LOG_ERROR, "Resampling with input channels greater than 2 unsupported.");
- return NULL;
+ av_log(NULL, AV_LOG_ERROR, "Resampling with input channels greater than 2 unsupported.");
+ return NULL;
}
s = av_mallocz(sizeof(ReSampleContext));
if (!s)
{
- av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for resample context.");
- return NULL;
+ av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for resample context.");
+ return NULL;
}
s->ratio = (float)output_rate / (float)input_rate;
-
+
s->input_channels = input_channels;
s->output_channels = output_channels;
-
+
s->filter_channels = s->input_channels;
if (s->output_channels < s->filter_channels)
s->filter_channels = s->output_channels;
if(s->filter_channels>2)
s->filter_channels = 2;
- s->resample_context= av_resample_init(output_rate, input_rate, 16, 10, 0);
-
+ s->resample_context= av_resample_init(output_rate, input_rate, 16, 10, 0, 1.0);
+
return s;
}
memcpy(bufin[i], s->temp[i], s->temp_len * sizeof(short));
buftmp2[i] = bufin[i] + s->temp_len;
}
-
+
/* make some zoom to avoid round pb */
lenout= (int)(nb_samples * s->ratio) + 16;
bufout[0]= (short*) av_malloc( lenout * sizeof(short) );