mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 04:31:06 +00:00
channelmix: simplify API a little
Remove the format and layout from the mix_samples function and use the format when creating the channel mixer object. Also use a flag to handle the unlikely case of non-interleaved samples like we do elsewhere.
This commit is contained in:
Wim Taymans
parent
7f5104f52f
commit
9fbe0386d0
3 changed files with 102 additions and 92 deletions
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@ -76,7 +76,6 @@ struct _GstAudioConverter
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AudioConvertFunc convert_in;
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GstAudioFormat mix_format;
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gboolean mix_passthrough;
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GstAudioChannelMix *mix;
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@ -263,8 +262,8 @@ gst_audio_converter_new (GstAudioInfo * in, GstAudioInfo * out,
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}
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/* step 3, channel mix */
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convert->mix_format = format;
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convert->mix = gst_audio_channel_mix_new (flags, in->channels, in->position,
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convert->mix =
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gst_audio_channel_mix_new (flags, format, in->channels, in->position,
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out->channels, out->position);
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convert->mix_passthrough =
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gst_audio_channel_mix_is_passthrough (convert->mix);
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@ -427,8 +426,7 @@ gst_audio_converter_samples (GstAudioConverter * convert,
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else
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outbuf = tmpbuf;
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gst_audio_channel_mix_samples (convert->mix, convert->mix_format,
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convert->in.layout, src, outbuf, samples);
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gst_audio_channel_mix_samples (convert->mix, src, outbuf, samples);
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src = outbuf;
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}
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/* step 4, optional convert F64 -> S32 for quantize */
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@ -31,9 +31,13 @@
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#define INT_MATRIX_FACTOR_EXPONENT 10
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typedef void (*MixFunc) (GstAudioChannelMix * mix, const gpointer src,
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gpointer dst, gint samples);
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struct _GstAudioChannelMix
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{
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GstAudioChannelMixFlags flags;
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GstAudioFormat format;
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gint in_channels;
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gint out_channels;
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@ -49,6 +53,8 @@ struct _GstAudioChannelMix
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* this is matrix * (2^10) as integers */
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gint **matrix_int;
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MixFunc func;
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gpointer tmp;
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};
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@ -681,72 +687,6 @@ gst_audio_channel_mix_setup_matrix (GstAudioChannelMix * mix)
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#endif
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}
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/**
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* gst_audio_channel_mix_new:
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* @flags:
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* @in_channels:
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* @in_position:
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* @out_channels:
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* @out_position:
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*
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* Create a new channel mixer object.
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*
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* Returns: a new #GstAudioChannelMix object. Free with gst_audio_channel_mix_free()
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* after usage.
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*/
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GstAudioChannelMix *
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gst_audio_channel_mix_new (GstAudioChannelMixFlags flags,
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gint in_channels,
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GstAudioChannelPosition in_position[64],
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gint out_channels, GstAudioChannelPosition out_position[64])
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{
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GstAudioChannelMix *mix;
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gint i;
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mix = g_slice_new0 (GstAudioChannelMix);
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mix->flags = flags;
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mix->in_channels = in_channels;
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mix->out_channels = out_channels;
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for (i = 0; i < 64; i++) {
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mix->in_position[i] = in_position[i];
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mix->out_position[i] = out_position[i];
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}
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gst_audio_channel_mix_setup_matrix (mix);
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return mix;
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}
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/**
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* gst_audio_channel_mix_is_passthrough:
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* @mix: a #GstAudioChannelMix
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*
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* Check if @mix is in passthrough.
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*
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* Returns: %TRUE is @mix is passthrough.
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*/
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gboolean
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gst_audio_channel_mix_is_passthrough (GstAudioChannelMix * mix)
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{
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gint i;
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guint64 in_mask, out_mask;
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/* only NxN matrices can be identities */
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if (mix->in_channels != mix->out_channels)
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return FALSE;
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/* passthrough for 1->1 channels (MONO and NONE position are the same here) */
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if (mix->in_channels == 1 && mix->out_channels == 1)
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return TRUE;
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/* passthrough if both channel masks are the same */
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in_mask = out_mask = 0;
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for (i = 0; i < mix->in_channels; i++) {
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in_mask |= mix->in_position[i];
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out_mask |= mix->out_position[i];
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}
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return in_mask == out_mask;
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}
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/* IMPORTANT: out_data == in_data is possible, make sure to not overwrite data
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* you might need later on! */
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static void
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@ -828,6 +768,91 @@ gst_audio_channel_mix_mix_double (GstAudioChannelMix * mix,
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}
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}
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/**
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* gst_audio_channel_mix_new:
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* @flags:
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* @in_channels:
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* @in_position:
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* @out_channels:
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* @out_position:
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*
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* Create a new channel mixer object.
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*
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* Returns: a new #GstAudioChannelMix object. Free with gst_audio_channel_mix_free()
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* after usage.
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*/
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GstAudioChannelMix *
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gst_audio_channel_mix_new (GstAudioChannelMixFlags flags,
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GstAudioFormat format,
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gint in_channels,
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GstAudioChannelPosition in_position[64],
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gint out_channels, GstAudioChannelPosition out_position[64])
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{
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GstAudioChannelMix *mix;
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gint i;
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g_return_val_if_fail (format == GST_AUDIO_FORMAT_S32
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|| format == GST_AUDIO_FORMAT_F64, NULL);
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g_return_val_if_fail (in_channels > 0, NULL);
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g_return_val_if_fail (out_channels > 0, NULL);
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mix = g_slice_new0 (GstAudioChannelMix);
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mix->flags = flags;
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mix->format = format;
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mix->in_channels = in_channels;
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mix->out_channels = out_channels;
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for (i = 0; i < 64; i++) {
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mix->in_position[i] = in_position[i];
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mix->out_position[i] = out_position[i];
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}
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gst_audio_channel_mix_setup_matrix (mix);
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switch (mix->format) {
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case GST_AUDIO_FORMAT_S32:
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mix->func = (MixFunc) gst_audio_channel_mix_mix_int;
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break;
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case GST_AUDIO_FORMAT_F64:
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mix->func = (MixFunc) gst_audio_channel_mix_mix_double;
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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return mix;
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}
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/**
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* gst_audio_channel_mix_is_passthrough:
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* @mix: a #GstAudioChannelMix
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*
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* Check if @mix is in passthrough.
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*
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* Returns: %TRUE is @mix is passthrough.
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*/
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gboolean
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gst_audio_channel_mix_is_passthrough (GstAudioChannelMix * mix)
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{
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gint i;
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guint64 in_mask, out_mask;
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/* only NxN matrices can be identities */
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if (mix->in_channels != mix->out_channels)
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return FALSE;
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/* passthrough for 1->1 channels (MONO and NONE position are the same here) */
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if (mix->in_channels == 1 && mix->out_channels == 1)
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return TRUE;
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/* passthrough if both channel masks are the same */
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in_mask = out_mask = 0;
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for (i = 0; i < mix->in_channels; i++) {
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in_mask |= mix->in_position[i];
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out_mask |= mix->out_position[i];
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}
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return in_mask == out_mask;
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}
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/**
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* gst_audio_channel_mix_samples:
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* @mix: a #GstAudioChannelMix
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@ -841,25 +866,11 @@ gst_audio_channel_mix_mix_double (GstAudioChannelMix * mix,
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* @in_data and @out_data need to be in @format and @layout.
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*/
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void
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gst_audio_channel_mix_samples (GstAudioChannelMix * mix, GstAudioFormat format,
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GstAudioLayout layout, const gpointer in_data, gpointer out_data,
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gint samples)
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gst_audio_channel_mix_samples (GstAudioChannelMix * mix,
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const gpointer in_data, gpointer out_data, gint samples)
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{
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g_return_if_fail (mix != NULL);
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g_return_if_fail (mix->matrix != NULL);
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g_return_if_fail (layout == GST_AUDIO_LAYOUT_INTERLEAVED);
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switch (format) {
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case GST_AUDIO_FORMAT_S32:
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gst_audio_channel_mix_mix_int (mix, (const gint32 *) in_data,
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(gint32 *) out_data, samples);
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break;
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case GST_AUDIO_FORMAT_F64:
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gst_audio_channel_mix_mix_double (mix, (const gdouble *) in_data,
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(gdouble *) out_data, samples);
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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mix->func (mix, in_data, out_data, samples);
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}
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@ -31,6 +31,7 @@ typedef struct _GstAudioChannelMix GstAudioChannelMix;
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/**
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* GstAudioChannelMixFlags:
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_NONE: no flag
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_NON_INTERLEAVED: channels are not interleaved
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_IN: input channels are explicitly unpositioned
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* @GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_OUT: output channels are explicitly unpositioned
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*
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@ -38,11 +39,13 @@ typedef struct _GstAudioChannelMix GstAudioChannelMix;
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*/
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typedef enum {
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GST_AUDIO_CHANNEL_MIX_FLAGS_NONE = 0,
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GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_IN = (1 << 0),
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GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_OUT = (1 << 1)
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GST_AUDIO_CHANNEL_MIX_FLAGS_NON_INTERLEAVED = (1 << 0),
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GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_IN = (1 << 1),
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GST_AUDIO_CHANNEL_MIX_FLAGS_UNPOSITIONED_OUT = (1 << 2)
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} GstAudioChannelMixFlags;
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GstAudioChannelMix * gst_audio_channel_mix_new (GstAudioChannelMixFlags flags,
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GstAudioFormat format,
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gint in_channels,
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GstAudioChannelPosition in_position[64],
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gint out_channels,
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@ -58,8 +61,6 @@ gboolean gst_audio_channel_mix_is_passthrough (GstAudioChannelMix *mix);
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* Do actual mixing.
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*/
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void gst_audio_channel_mix_samples (GstAudioChannelMix * mix,
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GstAudioFormat format,
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GstAudioLayout layout,
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const gpointer in_data,
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gpointer out_data,
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gint samples);
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