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ao_pcm: add append mode

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Pretty useful for debugging, although a bit useless or possibly
misleading too (see comments in the manpage).
This commit is contained in:
wm4 2015-01-14 22:14:56 +01:00
parent 4cabd08e8a
commit c8ecb66269
2 changed files with 7 additions and 1 deletions
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4
DOCS/man/ao.rst
View File

@ -257,6 +257,10 @@ Available audio output drivers are:
Write the sound to ``<filename>`` instead of the default
``audiodump.wav``. If ``no-waveheader`` is specified, the default is
``audiodump.pcm``.
``(no-)append``
Append to the file, instead of overwriting it. Always use this with the
``no-waveheader`` option - with ``waveheader`` it's broken, because
it will write a WAVE header every time the file is opened.
``rsound``
Audio output to an RSound daemon

4
audio/out/ao_pcm.c
View File

@ -46,6 +46,7 @@
struct priv {
char *outputfilename;
int waveheader;
int append;
uint64_t data_length;
FILE *fp;
};
@ -155,7 +156,7 @@ static int init(struct ao *ao)
MP_INFO(ao, "Info: Faster dumping is achieved with --no-video\n");
MP_INFO(ao, "Info: To write WAVE files use --ao=pcm:waveheader (default).\n");
priv->fp = fopen(priv->outputfilename, "wb");
priv->fp = fopen(priv->outputfilename, priv->append ? "ab" : "wb");
if (!priv->fp) {
MP_ERR(ao, "Failed to open %s for writing!\n", priv->outputfilename);
return -1;
@ -223,6 +224,7 @@ const struct ao_driver audio_out_pcm = {
.options = (const struct m_option[]) {
OPT_STRING("file", outputfilename, 0),
OPT_FLAG("waveheader", waveheader, 0),
OPT_FLAG("append", append, 0),
{0}
},
};