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bg_audio_converter_t * | bg_audio_converter_create (const gavl_audio_options_t *opt) |
| Create an audio converter. More...
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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. More...
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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. More...
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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. More...
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void | bg_audio_converter_destroy (bg_audio_converter_t *cnv) |
| Destroy an audio converter and free all associated memory. More...
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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. More...
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bg_video_converter_t * | bg_video_converter_create (const gavl_video_options_t *opt) |
| Create a video converter. More...
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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. More...
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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. More...
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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. More...
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void | bg_video_converter_destroy (bg_video_converter_t *cnv) |
| Destroy a video converter and free all associated memory. More...
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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. More...
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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.
Audio converter.
Opaque audio converter structure. You don't want to know, what's inside.
Video converter.
Opaque video converter structure. You don't want to know, what's inside.
Create an audio converter.
- Parameters
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The options should be valid for the whole lifetime of the converter.
Initialize an audio converter.
- Parameters
-
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.
Set input callback of an audio converter.
- Parameters
-
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 |
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 |
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Read samples from an audio converter.
- Parameters
-
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.
Destroy an audio converter and free all associated memory.
- Parameters
-
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.
Create a video converter.
- Parameters
-
The options should be valid for the whole lifetime of the converter.
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.
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 |
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.
Destroy a video converter and free all associated memory.
- Parameters
-
Reset a video converter as if no samples have been processed since initialization.
- Parameters
-
Reset a video converter as if no frame has been processed since initialization.