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| author | Sigrid <ftrvxmtrx@gmail.com> | 2020-08-12 10:43:46 +0200 |
|---|---|---|
| committer | Sigrid <ftrvxmtrx@gmail.com> | 2020-08-12 10:43:46 +0200 |
| commit | 81dba1327121e0f62fdf42de61402979b7de5da6 (patch) | |
| tree | 024aba0380fa0d1c42ed59eecaefdcf2c2f69d55 | |
| parent | 5fcf2040b43d13b6410285d45a0510b637d811c3 (diff) | |
| download | plan9front-81dba1327121e0f62fdf42de61402979b7de5da6.tar.xz | |
audio/mp3dec: add -s SECONDS option
| -rw-r--r-- | sys/man/1/audio | 3 | ||||
| -rw-r--r-- | sys/src/cmd/audio/mp3dec/main.c | 26 |
2 files changed, 28 insertions, 1 deletions
diff --git a/sys/man/1/audio b/sys/man/1/audio index 5bbe072a5..511182c98 100644 --- a/sys/man/1/audio +++ b/sys/man/1/audio @@ -4,6 +4,9 @@ mp3dec, mp3enc, oggdec, oggenc, flacdec, sundec, wavdec, pcmconv, mixfs \- decod .SH SYNOPSIS .B audio/mp3dec [ +.B -s +.I seconds +] [ .B -d ] .br diff --git a/sys/src/cmd/audio/mp3dec/main.c b/sys/src/cmd/audio/mp3dec/main.c index ee90ce0bd..20d2d0774 100644 --- a/sys/src/cmd/audio/mp3dec/main.c +++ b/sys/src/cmd/audio/mp3dec/main.c @@ -7,6 +7,7 @@ /* Current input file */ vlong offset; +double seekto = 0.0, curpos = 0.0; int debug = 0; int ifd = -1; @@ -30,6 +31,22 @@ input(void *, struct mad_stream *stream) } static enum mad_flow +header(void *, struct mad_header const* header) +{ + if(seekto > 0 && (header->duration.seconds > 0 || header->duration.fraction > 0)){ + double dur = header->duration.seconds + (double)header->duration.fraction / MAD_TIMER_RESOLUTION; + seekto -= dur; + if(seekto > 0){ + curpos += dur; + return MAD_FLOW_IGNORE; + } + fprint(2, "time: %g\n", curpos); + seekto = 0; + } + return MAD_FLOW_CONTINUE; +} + +static enum mad_flow output(void *, struct mad_header const* header, struct mad_pcm *pcm) { static int rate, chans; @@ -39,6 +56,9 @@ output(void *, struct mad_header const* header, struct mad_pcm *pcm) int i, j, n; uchar *p; + if(seekto > 0) + return MAD_FLOW_CONTINUE; + /* start converter if format changed */ if(rate != pcm->samplerate || chans != pcm->channels){ int pid, pfd[2]; @@ -145,11 +165,15 @@ main(int argc, char **argv) case 'd': debug++; break; + case 's': + seekto = atof(EARGF(usage())); + if(seekto >= 0.0) + break; default: usage(); }ARGEND - mad_decoder_init(&decoder, nil, input, nil, nil, output, error, nil); + mad_decoder_init(&decoder, nil, input, header, nil, output, error, nil); mad_decoder_run(&decoder, MAD_DECODER_MODE_SYNC); mad_decoder_finish(&decoder); |