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bg_audio_converter_t * | bg_audio_converter_create (const gavl_audio_options_t *opt) |
| Create an audio converter.
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int | bg_audio_converter_init (bg_audio_converter_t *cnv, const gavl_audio_format_t *in_format, const gavl_audio_format_t *out_format) |
| Initialize an audio converter.
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void | bg_audio_converter_connect_input (bg_audio_converter_t *cnv, bg_read_audio_func_t func, void *priv, int stream) |
| Set input callback of an audio converter.
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int | bg_audio_converter_read (void *priv, gavl_audio_frame_t *frame, int stream, int num_samples) |
| Read samples from an audio converter.
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void | bg_audio_converter_destroy (bg_audio_converter_t *cnv) |
| Destroy an audio converter and free all associated memory.
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void | bg_audio_converter_reset (bg_audio_converter_t *cnv) |
| Reset an audio converter as if no samples have been processed since initialization.
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bg_video_converter_t * | bg_video_converter_create (const gavl_video_options_t *opt) |
| Create a video converter.
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int | bg_video_converter_init (bg_video_converter_t *cnv, const gavl_video_format_t *in_format, const gavl_video_format_t *out_format) |
| Initialize a video converter.
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void | bg_video_converter_connect_input (bg_video_converter_t *cnv, bg_read_video_func_t func, void *priv, int stream) |
| Set input callback of a video converter.
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int | bg_video_converter_read (void *priv, gavl_video_frame_t *frame, int stream) |
| Read a video frame from a video converter.
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void | bg_video_converter_destroy (bg_video_converter_t *cnv) |
| Destroy a video converter and free all associated memory.
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void | bg_video_converter_reset (bg_video_converter_t *cnv) |
| Reset a video converter as if no samples have been processed since initialization.
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A/V converters, which can be plugged together with filters and input plugins. These are basically wrappers around the gavl_audio_converter_t and the gavl_video_converter_t with the difference, that they work asynchronous with the advantage, that the video converter can do framerate conversion as well.
The functions for reading A/V frames are compatible with the read functions of input plugins and filters for easy generation of processing pipelines.
◆ bg_audio_converter_t
Audio converter.
Opaque audio converter structure. You don't want to know, what's inside.
◆ bg_video_converter_t
Video converter.
Opaque video converter structure. You don't want to know, what's inside.
◆ bg_audio_converter_create()
Create an audio converter.
- Parameters
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The options should be valid for the whole lifetime of the converter.
◆ bg_audio_converter_init()
Initialize an audio converter.
- Parameters
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cnv | An audio converter |
in_format | Input format |
out_format | Output format |
- Returns
- The number of conversion steps
When this function returns 0 it means, that the converter can be bypassed. It should not be used then until the next initialization, which returns nonzero.
◆ bg_audio_converter_connect_input()
Set input callback of an audio converter.
- Parameters
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cnv | An audio converter |
func | The function to call |
priv | The private handle to pass to func |
stream | The stream argument to pass to func |
◆ bg_audio_converter_read()
int bg_audio_converter_read |
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void * | priv, |
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gavl_audio_frame_t * | frame, |
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int | stream, |
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int | num_samples ) |
Read samples from an audio converter.
- Parameters
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priv | An audio converter |
frame | An audio frame |
stream | Stream number (must be 0) |
num_samples | Number of samples to read |
- Returns
- The number of samples read. 0 means EOF.
This function can be used as an input callback for audio filters.
◆ bg_audio_converter_destroy()
Destroy an audio converter and free all associated memory.
- Parameters
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◆ bg_audio_converter_reset()
Reset an audio converter as if no samples have been processed since initialization.
- Parameters
-
Reset an audio converter as if no samples have been processed since initialization.
◆ bg_video_converter_create()
Create a video converter.
- Parameters
-
The options should be valid for the whole lifetime of the converter.
◆ bg_video_converter_init()
Initialize a video converter.
- Parameters
-
cnv | A video converter |
in_format | Input format |
out_format | Output format |
- Returns
- The number of conversion steps
When this function returns 0 it means, that the converter can be bypassed. It should not be used then until the next initialization, which returns nonzero.
◆ bg_video_converter_connect_input()
Set input callback of a video converter.
- Parameters
-
cnv | A video converter |
func | The function to call |
priv | The private handle to pass to func |
stream | The stream argument to pass to func |
◆ bg_video_converter_read()
Read a video frame from a video converter.
- Parameters
-
priv | A video converter |
frame | A video frame |
stream | Stream number (must be 0) |
- Returns
- 1 if a frame was read, 0 means EOF.
This function can be used as an input callback for video filters.
◆ bg_video_converter_destroy()
Destroy a video converter and free all associated memory.
- Parameters
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◆ bg_video_converter_reset()
Reset a video converter as if no samples have been processed since initialization.
- Parameters
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Reset a video converter as if no frame has been processed since initialization.