diff options
Diffstat (limited to 'debian/transcode/transcode-1.1.7/tools/aud_scan_avi.c')
| -rw-r--r-- | debian/transcode/transcode-1.1.7/tools/aud_scan_avi.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/debian/transcode/transcode-1.1.7/tools/aud_scan_avi.c b/debian/transcode/transcode-1.1.7/tools/aud_scan_avi.c new file mode 100644 index 00000000..655e4450 --- /dev/null +++ b/debian/transcode/transcode-1.1.7/tools/aud_scan_avi.c @@ -0,0 +1,199 @@ +/* + * aud_scan_avi.c + * + * Scans the audio track - AVI specific functions + * + * Copyright (C) Tilmann Bitterberg - June 2003 + * + * This file is part of transcode, a video stream processing tool + * + * transcode is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * transcode 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Make; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include "aud_scan_avi.h" +#include "aud_scan.h" + +// ------------------------ +// You must set the requested audio before entering this function +// the AVI file out must be filled with correct values. +// ------------------------ + +int sync_audio_video_avi2avi (double vid_ms, double *aud_ms, avi_t *in, avi_t *out) +{ + static char *data = NULL; + int vbr = AVI_get_audio_vbr(out); + int mp3rate = AVI_audio_mp3rate(out); + int format = AVI_audio_format(out); + int chan = AVI_audio_channels(out); + long rate = AVI_audio_rate(out); + int bits = AVI_audio_bits(out); + long bytes = 0; + + bits = (bits == 0)?16:bits; + + if (!data) data = malloc(48000*16*4); + if (!data) fprintf (stderr, "Malloc failed at %s:%d\n", __FILE__, __LINE__); + + if (format == 0x1) { + mp3rate = rate*chan*bits; + } else { + mp3rate *= 1000; + } + + if (tc_format_ms_supported(format)) { + + while (*aud_ms < vid_ms) { + + if( (bytes = AVI_read_audio_chunk(in, data)) < 0) { + AVI_print_error("AVI audio read frame"); + //*aud_ms = vid_ms; + return(-2); + } + //fprintf(stderr, "len (%ld)\n", bytes); + + if(AVI_write_audio(out, data, bytes)<0) { + AVI_print_error("AVI write audio frame"); + return(-1); + } + + // pass-through null frames + if (bytes == 0) { + *aud_ms = vid_ms; + break; + } + + if ( vbr && tc_get_audio_header(data, bytes, format, NULL, NULL, &mp3rate)<0) { + // if this is the last frame of the file, slurp in audio chunks + //if (n == frames-1) continue; + *aud_ms = vid_ms; + } else { + if (vbr) mp3rate *= 1000; + *aud_ms += (bytes*8.0*1000.0)/(double)mp3rate; + } + /* + fprintf(stderr, "%s track (%d) %8.0lf->%8.0lf len (%ld) rate (%ld)\n", + format==0x55?"MP3":format==0x1?"PCM":"AC3", + j, vid_ms, aud_ms[j], bytes, mp3rate); + */ + } + + } else { // fallback for not supported audio format + + do { + if ( (bytes = AVI_read_audio_chunk(in, data) ) < 0) { + AVI_print_error("AVI audio read frame"); + return -2; + } + + if(AVI_write_audio(out, data, bytes)<0) { + AVI_print_error("AVI write audio frame"); + return(-1); + } + } while (AVI_can_read_audio(in)); + } + + + return 0; +} + +int sync_audio_video_avi2avi_ro (double vid_ms, double *aud_ms, avi_t *in) +{ + static char *data = NULL; + int vbr = AVI_get_audio_vbr(in); + int mp3rate = AVI_audio_mp3rate(in); + int format = AVI_audio_format(in); + int chan = AVI_audio_channels(in); + long rate = AVI_audio_rate(in); + int bits = AVI_audio_bits(in); + long bytes = 0; + + bits = (bits == 0)?16:bits; + + if (!data) data = malloc(48000*16*4); + if (!data) fprintf (stderr, "Malloc failed at %s:%d\n", __FILE__, __LINE__); + + if (format == 0x1) { + mp3rate = rate*chan*bits; + } else { + mp3rate *= 1000; + } + + if (tc_format_ms_supported(format)) { + + while (*aud_ms < vid_ms) { + + if( (bytes = AVI_read_audio_chunk(in, data)) < 0) { + AVI_print_error("AVI audio read frame"); + //*aud_ms = vid_ms; + return(-2); + } + //fprintf(stderr, "len (%ld)\n", bytes); + + // pass-through null frames + if (bytes == 0) { + *aud_ms = vid_ms; + break; + } + + if ( vbr && tc_get_audio_header(data, bytes, format, NULL, NULL, &mp3rate)<0) { + // if this is the last frame of the file, slurp in audio chunks + //if (n == frames-1) continue; + *aud_ms = vid_ms; + } else { + if (vbr) mp3rate *= 1000; + *aud_ms += (bytes*8.0*1000.0)/(double)mp3rate; + } + /* + fprintf(stderr, "%s track (%d) %8.0lf->%8.0lf len (%ld) rate (%ld)\n", + format==0x55?"MP3":format==0x1?"PCM":"AC3", + j, vid_ms, aud_ms[j], bytes, mp3rate); + */ + } + + } else { // fallback for not supported audio format + + do { + if ( (bytes = AVI_read_audio_chunk(in, data) ) < 0) { + AVI_print_error("AVI audio read frame"); + return -2; + } + } while (AVI_can_read_audio(in)); + } + + + return 0; +} + +/*************************************************************************/ + +/* + * Local variables: + * c-file-style: "stroustrup" + * c-file-offsets: ((case-label . *) (statement-case-intro . *)) + * indent-tabs-mode: nil + * End: + * + * vim: expandtab shiftwidth=4: + */ |