#define __AUDIO_CONVERT_H__
#include <gst/gst.h>
-#include <gst/audio/multichannel.h>
+#include <gst/audio/audio.h>
+
+GST_DEBUG_CATEGORY_EXTERN (audio_convert_debug);
+#define GST_CAT_DEFAULT (audio_convert_debug)
+
+/**
+ * GstAudioConvertDithering:
+ * @DITHER_NONE: No dithering
+ * @DITHER_RPDF: Rectangular dithering
+ * @DITHER_TPDF: Triangular dithering (default)
+ * @DITHER_TPDF_HF: High frequency triangular dithering
+ *
+ * Set of available dithering methods when converting audio.
+ */
+typedef enum
+{
+ DITHER_NONE = 0,
+ DITHER_RPDF,
+ DITHER_TPDF,
+ DITHER_TPDF_HF
+} GstAudioConvertDithering;
+
+/**
+ * GstAudioConvertNoiseShaping:
+ * @NOISE_SHAPING_NONE: No noise shaping (default)
+ * @NOISE_SHAPING_ERROR_FEEDBACK: Error feedback
+ * @NOISE_SHAPING_SIMPLE: Simple 2-pole noise shaping
+ * @NOISE_SHAPING_MEDIUM: Medium 5-pole noise shaping
+ * @NOISE_SHAPING_HIGH: High 8-pole noise shaping
+ *
+ * Set of available noise shaping methods
+ */
+typedef enum
+{
+ NOISE_SHAPING_NONE = 0,
+ NOISE_SHAPING_ERROR_FEEDBACK,
+ NOISE_SHAPING_SIMPLE,
+ NOISE_SHAPING_MEDIUM,
+ NOISE_SHAPING_HIGH
+} GstAudioConvertNoiseShaping;
typedef struct _AudioConvertCtx AudioConvertCtx;
+#if 0
typedef struct _AudioConvertFmt AudioConvertFmt;
struct _AudioConvertFmt
gint rate;
gint channels;
GstAudioChannelPosition *pos;
+ gboolean unpositioned_layout;
/* int audio caps */
gboolean sign;
gint unit_size;
};
+#endif
-typedef void (*AudioConvertUnpack) (gpointer src, gpointer dst, gint scale, gint count);
-typedef void (*AudioConvertPack) (gpointer src, gpointer dst, gint scale, gint count);
+typedef void (*AudioConvertUnpack) (gpointer src, gpointer dst, gint scale,
+ gint count);
+typedef void (*AudioConvertPack) (gpointer src, gpointer dst, gint scale,
+ gint count);
typedef void (*AudioConvertMix) (AudioConvertCtx *, gpointer, gpointer, gint);
+typedef void (*AudioConvertQuantize) (AudioConvertCtx * ctx, gpointer src,
+ gpointer dst, gint count);
struct _AudioConvertCtx
{
- AudioConvertFmt in;
- AudioConvertFmt out;
+ GstAudioInfo in;
+ GstAudioInfo out;
AudioConvertUnpack unpack;
AudioConvertPack pack;
gint in_scale;
gint out_scale;
-
+
AudioConvertMix channel_mix;
-};
-gboolean audio_convert_clean_fmt (AudioConvertFmt *fmt);
+ AudioConvertQuantize quantize;
+
+ GstAudioConvertDithering dither;
+ GstAudioConvertNoiseShaping ns;
+ /* last random number generated per channel for hifreq TPDF dither */
+ gpointer last_random;
+ /* contains the past quantization errors, error[out_channels][count] */
+ gdouble *error_buf;
+};
-gboolean audio_convert_prepare_context (AudioConvertCtx *ctx, AudioConvertFmt *in,
- AudioConvertFmt *out);
-gboolean audio_convert_get_sizes (AudioConvertCtx *ctx, gint samples, gint *srcsize,
- gint *dstsize);
+gboolean audio_convert_prepare_context (AudioConvertCtx * ctx,
+ GstAudioInfo * in, GstAudioInfo * out,
+ GstAudioConvertDithering dither, GstAudioConvertNoiseShaping ns);
+gboolean audio_convert_get_sizes (AudioConvertCtx * ctx, gint samples,
+ gint * srcsize, gint * dstsize);
-gboolean audio_convert_clean_context (AudioConvertCtx *ctx);
+gboolean audio_convert_clean_context (AudioConvertCtx * ctx);
-gboolean audio_convert_convert (AudioConvertCtx *ctx, gpointer src,
- gpointer dst, gint samples, gboolean src_writable);
+gboolean audio_convert_convert (AudioConvertCtx * ctx, gpointer src,
+ gpointer dst, gint samples, gboolean src_writable);
#endif /* __AUDIO_CONVERT_H__ */