mirror of
https://github.com/cookiengineer/audacity
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299 lines
7.8 KiB
C
299 lines
7.8 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function: utility functions for vorbis codec test suite.
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last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $
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********************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <string.h>
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#include <errno.h>
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#include <vorbis/codec.h>
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#include <vorbis/vorbisenc.h>
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#include "write_read.h"
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/* The following function is basically a hacked version of the code in
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* examples/encoder_example.c */
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void
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write_vorbis_data_or_die (const char *filename, int srate, float q, const float * data, int count, int ch)
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{
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FILE * file ;
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ogg_stream_state os;
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ogg_page og;
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ogg_packet op;
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vorbis_info vi;
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vorbis_comment vc;
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vorbis_dsp_state vd;
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vorbis_block vb;
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int eos = 0, ret;
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if ((file = fopen (filename, "wb")) == NULL) {
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printf("\n\nError : fopen failed : %s\n", strerror (errno)) ;
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exit (1) ;
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}
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/********** Encode setup ************/
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vorbis_info_init (&vi);
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ret = vorbis_encode_init_vbr (&vi,ch,srate,q);
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if (ret) {
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printf ("vorbis_encode_init_vbr return %d\n", ret) ;
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exit (1) ;
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}
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vorbis_comment_init (&vc);
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vorbis_comment_add_tag (&vc,"ENCODER","test/util.c");
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vorbis_analysis_init (&vd,&vi);
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vorbis_block_init (&vd,&vb);
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ogg_stream_init (&os,12345678);
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{
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ogg_packet header;
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ogg_packet header_comm;
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ogg_packet header_code;
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vorbis_analysis_headerout (&vd,&vc,&header,&header_comm,&header_code);
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ogg_stream_packetin (&os,&header);
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ogg_stream_packetin (&os,&header_comm);
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ogg_stream_packetin (&os,&header_code);
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/* Ensures the audio data will start on a new page. */
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while (!eos){
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int result = ogg_stream_flush (&os,&og);
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if (result == 0)
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break;
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fwrite (og.header,1,og.header_len,file);
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fwrite (og.body,1,og.body_len,file);
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}
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}
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{
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/* expose the buffer to submit data */
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float **buffer = vorbis_analysis_buffer (&vd,count);
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int i;
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for(i=0;i<ch;i++)
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memcpy (buffer [i], data, count * sizeof (float)) ;
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/* tell the library how much we actually submitted */
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vorbis_analysis_wrote (&vd,count);
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vorbis_analysis_wrote (&vd,0);
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}
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while (vorbis_analysis_blockout (&vd,&vb) == 1) {
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vorbis_analysis (&vb,NULL);
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vorbis_bitrate_addblock (&vb);
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while (vorbis_bitrate_flushpacket (&vd,&op)) {
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ogg_stream_packetin (&os,&op);
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while (!eos) {
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int result = ogg_stream_pageout (&os,&og);
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if (result == 0)
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break;
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fwrite (og.header,1,og.header_len,file);
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fwrite (og.body,1,og.body_len,file);
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if (ogg_page_eos (&og))
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eos = 1;
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}
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}
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}
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ogg_stream_clear (&os);
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vorbis_block_clear (&vb);
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vorbis_dsp_clear (&vd);
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vorbis_comment_clear (&vc);
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vorbis_info_clear (&vi);
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fclose (file) ;
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}
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/* The following function is basically a hacked version of the code in
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* examples/decoder_example.c */
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void
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read_vorbis_data_or_die (const char *filename, int srate, float * data, int count)
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{
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ogg_sync_state oy;
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ogg_stream_state os;
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ogg_page og;
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ogg_packet op;
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vorbis_info vi;
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vorbis_comment vc;
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vorbis_dsp_state vd;
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vorbis_block vb;
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FILE *file;
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char *buffer;
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int bytes;
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int eos = 0;
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int i;
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int read_total = 0 ;
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if ((file = fopen (filename, "rb")) == NULL) {
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printf("\n\nError : fopen failed : %s\n", strerror (errno)) ;
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exit (1) ;
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}
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ogg_sync_init (&oy);
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{
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/* fragile! Assumes all of our headers will fit in the first 8kB,
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which currently they will */
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buffer = ogg_sync_buffer (&oy,8192);
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bytes = fread (buffer,1,8192,file);
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ogg_sync_wrote (&oy,bytes);
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if(ogg_sync_pageout (&oy,&og) != 1) {
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if(bytes < 8192) {
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printf ("Out of data.\n") ;
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goto done_decode ;
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}
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fprintf (stderr,"Input does not appear to be an Ogg bitstream.\n");
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exit (1);
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}
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ogg_stream_init (&os,ogg_page_serialno(&og));
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vorbis_info_init (&vi);
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vorbis_comment_init (&vc);
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if (ogg_stream_pagein (&os,&og) < 0) {
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fprintf (stderr,"Error reading first page of Ogg bitstream data.\n");
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exit (1);
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}
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if (ogg_stream_packetout(&os,&op) != 1) {
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fprintf (stderr,"Error reading initial header packet.\n");
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exit (1);
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}
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if (vorbis_synthesis_headerin (&vi,&vc,&op) < 0) {
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fprintf (stderr,"This Ogg bitstream does not contain Vorbis "
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"audio data.\n");
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exit (1);
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}
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i = 0;
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while ( i < 2) {
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while (i < 2) {
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int result = ogg_sync_pageout (&oy,&og);
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if(result == 0)
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break;
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if(result==1) {
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ogg_stream_pagein(&os,&og);
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while (i < 2) {
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result = ogg_stream_packetout (&os,&op);
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if (result == 0) break;
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if (result < 0) {
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fprintf (stderr,"Corrupt secondary header. Exiting.\n");
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exit(1);
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}
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vorbis_synthesis_headerin (&vi,&vc,&op);
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i++;
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}
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}
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}
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buffer = ogg_sync_buffer (&oy,4096);
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bytes = fread (buffer,1,4096,file);
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if (bytes == 0 && i < 2) {
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fprintf (stderr,"End of file before finding all Vorbis headers!\n");
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exit (1);
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}
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ogg_sync_wrote (&oy,bytes);
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}
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if (vi.rate != srate) {
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printf ("\n\nError : File '%s' has sample rate of %ld when it should be %d.\n\n", filename, vi.rate, srate);
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exit (1) ;
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}
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vorbis_synthesis_init (&vd,&vi);
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vorbis_block_init (&vd,&vb);
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while(!eos) {
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while (!eos) {
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int result = ogg_sync_pageout (&oy,&og);
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if (result == 0)
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break;
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if (result < 0) {
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fprintf (stderr,"Corrupt or missing data in bitstream; "
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"continuing...\n");
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} else {
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ogg_stream_pagein (&os,&og);
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while (1) {
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result = ogg_stream_packetout (&os,&op);
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if (result == 0)
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break;
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if (result < 0) {
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/* no reason to complain; already complained above */
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} else {
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float **pcm;
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int samples;
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if (vorbis_synthesis (&vb,&op) == 0)
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vorbis_synthesis_blockin(&vd,&vb);
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while ((samples = vorbis_synthesis_pcmout (&vd,&pcm)) > 0 && read_total < count) {
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int bout = samples < count ? samples : count;
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bout = read_total + bout > count ? count - read_total : bout;
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memcpy (data + read_total, pcm[0], bout * sizeof (float)) ;
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vorbis_synthesis_read (&vd,bout);
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read_total += bout ;
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}
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}
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}
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if (ogg_page_eos (&og)) eos = 1;
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}
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}
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if (!eos) {
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buffer = ogg_sync_buffer (&oy,4096);
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bytes = fread (buffer,1,4096,file);
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ogg_sync_wrote (&oy,bytes);
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if (bytes == 0) eos = 1;
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}
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}
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ogg_stream_clear (&os);
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vorbis_block_clear (&vb);
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vorbis_dsp_clear (&vd);
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vorbis_comment_clear (&vc);
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vorbis_info_clear (&vi);
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}
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done_decode:
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/* OK, clean up the framer */
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ogg_sync_clear (&oy);
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fclose (file) ;
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}
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