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GStreamer Base Plugins 0.10 Library Reference Manual | |
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#include <gst/audio/audio.h> enum GstAudioFieldFlag; #define GST_FRAMES_TO_CLOCK_TIME (frames, rate) #define GST_CLOCK_TIME_TO_FRAMES (clocktime, rate) #define GST_AUDIO_DEF_RATE #define GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS #define GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS #define GST_AUDIO_INT_PAD_TEMPLATE_CAPS #define GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS int gst_audio_frame_byte_size (GstPad *pad); long gst_audio_frame_length (GstPad *pad, GstBuffer *buf); GstClockTime gst_audio_duration_from_pad_buffer (GstPad *pad, GstBuffer *buf); gboolean gst_audio_is_buffer_framed (GstPad *pad, GstBuffer *buf); void gst_audio_structure_set_int (GstStructure *structure, GstAudioFieldFlag flag); GstBuffer* gst_audio_buffer_clip (GstBuffer *buffer, GstSegment *segment, gint rate, gint frame_size);
typedef enum {
GST_AUDIO_FIELD_RATE = (1 << 0),
GST_AUDIO_FIELD_CHANNELS = (1 << 1),
GST_AUDIO_FIELD_ENDIANNESS = (1 << 2),
GST_AUDIO_FIELD_WIDTH = (1 << 3),
GST_AUDIO_FIELD_DEPTH = (1 << 4),
GST_AUDIO_FIELD_SIGNED = (1 << 5)
} GstAudioFieldFlag;
GstAudioFieldFlag is deprecated and should not be used in newly-written code. use gst_structure_set() directly
Do not use anymore.
#define GST_FRAMES_TO_CLOCK_TIME(frames, rate)
Calculate clocktime from sample frames and rate.
frames : |
sample frames |
rate : |
sampling rate |
#define GST_CLOCK_TIME_TO_FRAMES(clocktime, rate)
Calculate frames from clocktime and sample rate.
clocktime : |
clock time |
rate : |
sampling rate |
#define GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS
Template caps for float audio. Can be used when defining a GstStaticPadTemplate
#define GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS
Template caps for 32bit float mono audio in native byte-order. Can be used when defining a GstStaticPadTemplate
#define GST_AUDIO_INT_PAD_TEMPLATE_CAPS
Template caps for integer audio. Can be used when defining a GstStaticPadTemplate
#define GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS
Template caps for 16bit integer stereo audio in native byte-order. Can be used when defining a GstStaticPadTemplate
int gst_audio_frame_byte_size (GstPad *pad);
Calculate byte size of an audio frame.
pad : |
the GstPad to get the caps from |
| Returns : | the byte size, or 0 if there was an error |
long gst_audio_frame_length (GstPad *pad,
GstBuffer *buf);
Calculate length of buffer in frames.
pad : |
the GstPad to get the caps from |
buf : |
the GstBuffer |
| Returns : | 0 if there's an error, or the number of frames if everything's ok |
GstClockTime gst_audio_duration_from_pad_buffer (GstPad *pad,
GstBuffer *buf);
Calculate length in nanoseconds of audio buffer buf based on capabilities of
pad.
pad : |
the GstPad to get the caps from |
buf : |
the GstBuffer |
| Returns : | the length. |
gboolean gst_audio_is_buffer_framed (GstPad *pad,
GstBuffer *buf);
Check if the buffer size is a whole multiple of the frame size.
pad : |
the GstPad to get the caps from |
buf : |
the GstBuffer |
| Returns : | TRUE if buffer size is multiple.
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void gst_audio_structure_set_int (GstStructure *structure,
GstAudioFieldFlag flag);
gst_audio_structure_set_int is deprecated and should not be used in newly-written code. use gst_structure_set()
Do not use anymore.
structure : |
a GstStructure |
flag : |
a set of GstAudioFieldFlag |
GstBuffer* gst_audio_buffer_clip (GstBuffer *buffer,
GstSegment *segment,
gint rate,
gint frame_size);
Clip the the buffer to the given GstSegment.
After calling this function the caller does not own a reference to
buffer anymore.
buffer : |
The buffer to clip. |
segment : |
Segment in GST_FORMAT_TIME or GST_FORMAT_DEFAULT to which the buffer should be clipped.
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rate : |
sample rate. |
frame_size : |
size of one audio frame in bytes. |
| Returns : | NULL if the buffer is completely outside the configured segment,
otherwise the clipped buffer is returned.
If the buffer has no timestamp, it is assumed to be inside the segment and
is not clipped
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Since 0.10.14