source.c File Reference

Unified media source implementation. More...

Go to the source code of this file.

Data Structures
struct	media_source_t
	Media source for video and audio capture. More...

Functions
media_source_t *	media_source_create (media_source_type_t type, const char *path)
	Create a new media source.
void	media_source_destroy (media_source_t *source)
	Destroy media source and free resources.
asciichat_error_t	media_source_start_video (media_source_t *source)
bool	media_source_uses_webcam (media_source_t *source)
image_t *	media_source_read_video (media_source_t *source)
	Read next video frame from media source.
bool	media_source_has_video (media_source_t *source)
	Check if media source has video stream.
size_t	media_source_read_audio (media_source_t *source, float *buffer, size_t num_samples)
	Read audio samples from media source.
bool	media_source_has_audio (media_source_t *source)
	Check if media source has audio stream.
void	media_source_set_loop (media_source_t *source, bool loop)
	Enable or disable looping.
bool	media_source_at_end (media_source_t *source)
	Check if media source reached end of stream.
asciichat_error_t	media_source_rewind (media_source_t *source)
	Rewind media source to beginning.
asciichat_error_t	media_source_seek (media_source_t *source, double timestamp_sec)
	Seek media source to timestamp.
media_source_type_t	media_source_get_type (media_source_t *source)
	Get media source type.
double	media_source_get_duration (media_source_t *source)
	Get media duration in seconds.
double	media_source_get_position (media_source_t *source)
	Get current playback position in seconds.
double	media_source_get_video_fps (media_source_t *source)
	Get video frame rate in frames per second.
void	media_source_pause (media_source_t *source)
	Pause media playback.
void	media_source_resume (media_source_t *source)
	Resume media playback after pause.
bool	media_source_is_paused (media_source_t *source)
	Check if media source is paused.
void	media_source_toggle_pause (media_source_t *source)
	Toggle pause state of media source.
void	media_source_set_audio_context (media_source_t *source, void *audio_ctx)
	Set audio context for playback buffer management.
void	media_source_set_exit_callback (media_source_t *source, bool(*should_exit_callback)(void *), void *user_data)
	Set exit signal callback for graceful shutdown during I/O.

Detailed Description

Unified media source implementation.

Definition in file source.c.

Function Documentation

media_source_start_video()

asciichat_error_t media_source_start_video

(

media_source_t *

source

)

Definition at line 506 of file source.c.

                                                                   {
  if (!source)
    return SET_ERRNO(ERROR_INVALID_PARAM, "Missing media source");
  if (!source->audio_only || source->webcam_ctx || GET_OPTION(test_pattern))
    return ASCIICHAT_OK;
  source->webcam_index = GET_OPTION(webcam_index);
  asciichat_error_t err = webcam_init_context(&source->webcam_ctx, source->webcam_index);
  if (err != ASCIICHAT_OK)
    return SET_ERRNO(err, "Audio-only media requires webcam %u", source->webcam_index);
  log_info("Audio-only media: using webcam %u for video", source->webcam_index);
  return ASCIICHAT_OK;
}

References ASCIICHAT_OK, media_source_t::audio_only, ERROR_INVALID_PARAM, GET_OPTION, log_info, SET_ERRNO, media_source_t::webcam_ctx, media_source_t::webcam_index, and webcam_init_context().

Referenced by media_source_read_video(), and session_capture_create().

media_source_uses_webcam()

bool media_source_uses_webcam

(

media_source_t *

source

)

Definition at line 519 of file source.c.

                                                      {
  return source && (source->type == MEDIA_SOURCE_WEBCAM || (source->audio_only && !GET_OPTION(test_pattern)));
}

References media_source_t::audio_only, GET_OPTION, MEDIA_SOURCE_WEBCAM, and media_source_t::type.

Referenced by session_pipeline_create().