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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
commit | 2aa4a82499d4becd2284cdb482213d541b8804dd (patch) | |
tree | b80bf8bf13c3766139fbacc530efd0dd9d54394c /media/libvorbis/lib/vorbis_analysis.c | |
parent | Initial commit. (diff) | |
download | firefox-2aa4a82499d4becd2284cdb482213d541b8804dd.tar.xz firefox-2aa4a82499d4becd2284cdb482213d541b8804dd.zip |
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/libvorbis/lib/vorbis_analysis.c')
-rw-r--r-- | media/libvorbis/lib/vorbis_analysis.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/media/libvorbis/lib/vorbis_analysis.c b/media/libvorbis/lib/vorbis_analysis.c new file mode 100644 index 0000000000..14919737eb --- /dev/null +++ b/media/libvorbis/lib/vorbis_analysis.c @@ -0,0 +1,119 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * + * * + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * + * by the Xiph.Org Foundation https://xiph.org/ * + * * + ******************************************************************** + + function: single-block PCM analysis mode dispatch + + ********************************************************************/ + +#include <stdio.h> +#include <string.h> +#include <math.h> +#include <ogg/ogg.h> +#include "vorbis/codec.h" +#include "codec_internal.h" +#include "registry.h" +#include "scales.h" +#include "os.h" +#include "misc.h" + +/* decides between modes, dispatches to the appropriate mapping. */ +int vorbis_analysis(vorbis_block *vb, ogg_packet *op){ + int ret,i; + vorbis_block_internal *vbi=vb->internal; + + vb->glue_bits=0; + vb->time_bits=0; + vb->floor_bits=0; + vb->res_bits=0; + + /* first things first. Make sure encode is ready */ + for(i=0;i<PACKETBLOBS;i++) + oggpack_reset(vbi->packetblob[i]); + + /* we only have one mapping type (0), and we let the mapping code + itself figure out what soft mode to use. This allows easier + bitrate management */ + + if((ret=_mapping_P[0]->forward(vb))) + return(ret); + + if(op){ + if(vorbis_bitrate_managed(vb)) + /* The app is using a bitmanaged mode... but not using the + bitrate management interface. */ + return(OV_EINVAL); + + op->packet=oggpack_get_buffer(&vb->opb); + op->bytes=oggpack_bytes(&vb->opb); + op->b_o_s=0; + op->e_o_s=vb->eofflag; + op->granulepos=vb->granulepos; + op->packetno=vb->sequence; /* for sake of completeness */ + } + return(0); +} + +#ifdef ANALYSIS +int analysis_noisy=1; + +/* there was no great place to put this.... */ +void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){ + int j; + FILE *of; + char buffer[80]; + + sprintf(buffer,"%s_%d.m",base,i); + of=fopen(buffer,"w"); + + if(!of)perror("failed to open data dump file"); + + for(j=0;j<n;j++){ + if(bark){ + float b=toBARK((4000.f*j/n)+.25); + fprintf(of,"%f ",b); + }else + if(off!=0) + fprintf(of,"%f ",(double)(j+off)/8000.); + else + fprintf(of,"%f ",(double)j); + + if(dB){ + float val; + if(v[j]==0.) + val=-140.; + else + val=todB(v+j); + fprintf(of,"%f\n",val); + }else{ + fprintf(of,"%f\n",v[j]); + } + } + fclose(of); +} + +void _analysis_output(char *base,int i,float *v,int n,int bark,int dB, + ogg_int64_t off){ + if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off); +} + +#endif + + + + + + + + + + + |