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audio-converter: handle NULL input

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Allow NULL as input to mean silence samples.
This commit is contained in:
Wim Taymans 2016-01-26 16:36:41 +01:00
parent 6050509b65
commit 2d971df593
1 changed files with 35 additions and 20 deletions
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39
gst-libs/gst/audio/audio-converter.c
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@ -154,6 +154,7 @@ struct _AudioChain
gpointer make_func_data;
GDestroyNotify make_func_notify;
const GstAudioFormatInfo *finfo;
gint stride;
gint inc;
gint blocks;
@ -175,7 +176,6 @@ static AudioChain *
audio_chain_new (AudioChain * prev, GstAudioConverter * convert)
{
AudioChain *chain;
const GstAudioFormatInfo *finfo;
chain = g_slice_new0 (AudioChain);
chain->prev = prev;
@ -187,8 +187,8 @@ audio_chain_new (AudioChain * prev, GstAudioConverter * convert)
chain->inc = convert->current_channels;
chain->blocks = 1;
}
finfo = gst_audio_format_get_info (convert->current_format);
chain->stride = (finfo->width * chain->inc) / 8;
chain->finfo = gst_audio_format_get_info (convert->current_format);
chain->stride = (chain->finfo->width * chain->inc) / 8;
return chain;
}
@ -425,6 +425,7 @@ do_unpack (AudioChain * chain, gpointer user_data)
GST_LOG ("unpack to tmp %p, %" G_GSIZE_FORMAT, tmp, num_samples);
}
if (convert->in_data) {
for (i = 0; i < chain->blocks; i++) {
GST_LOG ("unpack %p, %p, %" G_GSIZE_FORMAT, tmp[i], convert->in_data[i],
num_samples);
@ -432,6 +433,12 @@ do_unpack (AudioChain * chain, gpointer user_data)
GST_AUDIO_PACK_FLAG_TRUNCATE_RANGE, tmp[i], convert->in_data[i],
num_samples * chain->inc);
}
} else {
for (i = 0; i < chain->blocks; i++) {
gst_audio_format_fill_silence (chain->finfo, tmp[i],
num_samples * chain->inc);
}
}
} else {
tmp = convert->in_data;
GST_LOG ("get in samples %p", tmp);
@ -531,7 +538,6 @@ chain_unpack (GstAudioConverter * convert)
AudioChain *prev;
GstAudioInfo *in = &convert->in;
GstAudioInfo *out = &convert->out;
const GstAudioFormatInfo *fup;
gboolean same_format;
same_format = in->finfo->format == out->finfo->format;
@ -552,10 +558,8 @@ chain_unpack (GstAudioConverter * convert)
gst_audio_format_to_string (in->finfo->format),
gst_audio_format_to_string (convert->current_format));
fup = gst_audio_format_get_info (convert->current_format);
prev = convert->unpack_chain = audio_chain_new (NULL, convert);
prev->allow_ip = fup->width <= in->finfo->width;
prev->allow_ip = prev->finfo->width <= in->finfo->width;
prev->pass_alloc = FALSE;
audio_chain_set_make_func (prev, do_unpack, convert, NULL);
@ -747,18 +751,27 @@ converter_passthrough (GstAudioConverter * convert,
gpointer out[], gsize out_frames)
{
gint i;
gsize bytes;
AudioChain *chain;
gsize samples;
chain = convert->pack_chain;
bytes = in_frames * chain->inc * (convert->in.bpf / convert->in.channels);
samples = in_frames * chain->inc;
GST_LOG ("passthrough: %" G_GSIZE_FORMAT " / %" G_GSIZE_FORMAT " bytes",
in_frames, bytes);
GST_LOG ("passthrough: %" G_GSIZE_FORMAT " / %" G_GSIZE_FORMAT " samples",
in_frames, samples);
if (in) {
gsize bytes;
bytes = samples * (convert->in.bpf / convert->in.channels);
for (i = 0; i < chain->blocks; i++)
memcpy (out[i], in[i], bytes);
} else {
for (i = 0; i < chain->blocks; i++)
gst_audio_format_fill_silence (convert->in.finfo, out[i], samples);
}
return TRUE;
}
@ -977,6 +990,9 @@ gst_audio_converter_get_max_latency (GstAudioConverter * convert)
* If non-interleaved samples are used, @in and @out must point to an
* array with pointers to memory blocks, one for each channel.
*
* @in may be %NULL, in which case @in_frames of silence samples are processed
* by the converter.
*
* This function always produces @out_frames of output and consumes @in_frames of
* input. Use gst_audio_converter_get_out_frames() and
* gst_audio_converter_get_in_frames() to make sure @in_frames and @out_frames
@ -990,7 +1006,6 @@ gst_audio_converter_samples (GstAudioConverter * convert,
gpointer out[], gsize out_frames)
{
g_return_val_if_fail (convert != NULL, FALSE);
g_return_val_if_fail (in != NULL, FALSE);
g_return_val_if_fail (out != NULL, FALSE);
in_frames = MIN (in_frames, out_frames);