Libav
|
Modules | |
Audio channel masks | |
Audio channel convenience macros | |
Audio downmix metadata |
Functions | |
void | av_audio_fifo_free (AVAudioFifo *af) |
Free an AVAudioFifo. | |
AVAudioFifo * | av_audio_fifo_alloc (enum AVSampleFormat sample_fmt, int channels, int nb_samples) |
Allocate an AVAudioFifo. | |
int | av_audio_fifo_realloc (AVAudioFifo *af, int nb_samples) |
Reallocate an AVAudioFifo. | |
int | av_audio_fifo_write (AVAudioFifo *af, void **data, int nb_samples) |
Write data to an AVAudioFifo. | |
int | av_audio_fifo_read (AVAudioFifo *af, void **data, int nb_samples) |
Read data from an AVAudioFifo. | |
int | av_audio_fifo_drain (AVAudioFifo *af, int nb_samples) |
Drain data from an AVAudioFifo. | |
void | av_audio_fifo_reset (AVAudioFifo *af) |
Reset the AVAudioFifo buffer. | |
int | av_audio_fifo_size (AVAudioFifo *af) |
Get the current number of samples in the AVAudioFifo available for reading. | |
int | av_audio_fifo_space (AVAudioFifo *af) |
Get the current number of samples in the AVAudioFifo available for writing. | |
uint64_t | av_get_channel_layout (const char *name) |
Return a channel layout id that matches name, or 0 if no match is found. | |
void | av_get_channel_layout_string (char *buf, int buf_size, int nb_channels, uint64_t channel_layout) |
Return a description of a channel layout. | |
int | av_get_channel_layout_nb_channels (uint64_t channel_layout) |
Return the number of channels in the channel layout. | |
uint64_t | av_get_default_channel_layout (int nb_channels) |
Return default channel layout for a given number of channels. | |
int | av_get_channel_layout_channel_index (uint64_t channel_layout, uint64_t channel) |
Get the index of a channel in channel_layout. | |
uint64_t | av_channel_layout_extract_channel (uint64_t channel_layout, int index) |
Get the channel with the given index in channel_layout. | |
const char * | av_get_channel_name (uint64_t channel) |
Get the name of a given channel. |
void av_audio_fifo_free | ( | AVAudioFifo * | af | ) |
Free an AVAudioFifo.
af | AVAudioFifo to free |
Definition at line 45 of file audio_fifo.c.
Referenced by av_audio_fifo_alloc(), avresample_close(), main(), and uninit().
AVAudioFifo* av_audio_fifo_alloc | ( | enum AVSampleFormat | sample_fmt, |
int | channels, | ||
int | nb_samples | ||
) |
Allocate an AVAudioFifo.
sample_fmt | sample format |
channels | number of channels |
nb_samples | initial allocation size, in samples |
Definition at line 60 of file audio_fifo.c.
Referenced by av_buffersink_get_samples(), avresample_open(), config_output(), and init_fifo().
int av_audio_fifo_realloc | ( | AVAudioFifo * | af, |
int | nb_samples | ||
) |
Reallocate an AVAudioFifo.
af | AVAudioFifo to reallocate |
nb_samples | new allocation size, in samples |
Definition at line 97 of file audio_fifo.c.
Referenced by add_samples_to_fifo(), and av_audio_fifo_write().
int av_audio_fifo_write | ( | AVAudioFifo * | af, |
void ** | data, | ||
int | nb_samples | ||
) |
Write data to an AVAudioFifo.
The AVAudioFifo will be reallocated automatically if the available space is less than nb_samples.
af | AVAudioFifo to write to |
data | audio data plane pointers |
nb_samples | number of samples to write |
Definition at line 113 of file audio_fifo.c.
Referenced by add_samples_to_fifo(), av_buffersink_get_samples(), ff_audio_data_add_to_fifo(), and filter_frame().
int av_audio_fifo_read | ( | AVAudioFifo * | af, |
void ** | data, | ||
int | nb_samples | ||
) |
Read data from an AVAudioFifo.
af | AVAudioFifo to read from |
data | audio data plane pointers |
nb_samples | number of samples to read |
Definition at line 139 of file audio_fifo.c.
Referenced by avresample_read(), ff_audio_data_read_from_fifo(), load_encode_and_write(), output_frame(), and read_from_fifo().
int av_audio_fifo_drain | ( | AVAudioFifo * | af, |
int | nb_samples | ||
) |
Drain data from an AVAudioFifo.
Removes the data without reading it.
af | AVAudioFifo to drain |
nb_samples | number of samples to drain |
Definition at line 159 of file audio_fifo.c.
Referenced by avresample_read().
void av_audio_fifo_reset | ( | AVAudioFifo * | af | ) |
Reset the AVAudioFifo buffer.
This empties all data in the buffer.
af | AVAudioFifo to reset |
Definition at line 176 of file audio_fifo.c.
int av_audio_fifo_size | ( | AVAudioFifo * | af | ) |
Get the current number of samples in the AVAudioFifo available for reading.
af | the AVAudioFifo to query |
Definition at line 186 of file audio_fifo.c.
Referenced by add_samples_to_fifo(), av_audio_fifo_write(), av_buffersink_get_samples(), avresample_available(), avresample_convert(), avresample_set_compensation(), get_available_samples(), handle_buffered_output(), load_encode_and_write(), main(), and request_samples().
int av_audio_fifo_space | ( | AVAudioFifo * | af | ) |
Get the current number of samples in the AVAudioFifo available for writing.
af | the AVAudioFifo to query |
Definition at line 191 of file audio_fifo.c.
Referenced by av_audio_fifo_write().
uint64_t av_get_channel_layout | ( | const char * | name | ) |
Return a channel layout id that matches name, or 0 if no match is found.
name can be one or several of the following notations, separated by '+' or '|':
Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
Definition at line 130 of file channel_layout.c.
Referenced by channelmap_init(), get_channel(), init(), init_audio(), join_init(), and opt_channel_layout().
void av_get_channel_layout_string | ( | char * | buf, |
int | buf_size, | ||
int | nb_channels, | ||
uint64_t | channel_layout | ||
) |
Return a description of a channel layout.
If nb_channels is <= 0, it is guessed from the channel_layout.
buf | put here the string containing the channel layout |
buf_size | size in bytes of the buffer |
Definition at line 146 of file channel_layout.c.
Referenced by avcodec_string(), channelmap_config_input(), channelmap_init(), config_output(), decode_audio(), dprint_options(), ff_alsa_open(), ff_audio_mix_set_matrix(), ff_dlog_link(), filter_frame(), guess_input_channel_layout(), and print_digraph().
int av_get_channel_layout_nb_channels | ( | uint64_t | channel_layout | ) |
Return the number of channels in the channel layout.
Definition at line 180 of file channel_layout.c.
Referenced by audio_encode_example(), av_buffersink_get_samples(), av_channel_layout_extract_channel(), av_frame_get_plane_buffer(), av_frame_make_writable(), av_frame_ref(), av_get_channel_layout_channel_index(), av_get_channel_layout_string(), av_get_channel_name(), avcodec_open2(), avresample_build_matrix(), avresample_get_matrix(), avresample_open(), avresample_set_channel_mapping(), avresample_set_matrix(), buffer_offset(), calc_ptr_alignment(), channelmap_config_input(), channelmap_filter_frame(), channelmap_init(), config_input(), config_output(), cook_decode_init(), ff_default_get_audio_buffer(), ff_filter_frame(), ff_get_buffer(), ff_mov_get_channel_layout_tag(), filter_frame(), get_audio_buffer(), get_channel(), get_stream_info(), init(), join_init(), main(), mov_read_dec3(), opt_channel_layout(), return_audio_frame(), select_channel_layout(), stream_component_open(), swap_channel_layouts_on_filter(), thd_channel_layout_extract_channel(), transcode_init(), unrefcount_frame(), and update_frame_pool().
uint64_t av_get_default_channel_layout | ( | int | nb_channels | ) |
Return default channel layout for a given number of channels.
Definition at line 185 of file channel_layout.c.
Referenced by channelmap_init(), configure_output_audio_filter(), ff_get_buffer(), get_channel_layout_single(), guess_input_channel_layout(), init_resampler(), open_output_file(), set_channel_info(), and stream_component_open().
int av_get_channel_layout_channel_index | ( | uint64_t | channel_layout, |
uint64_t | channel | ||
) |
Get the index of a channel in channel_layout.
channel | a channel layout describing exactly one channel which must be present in channel_layout. |
Definition at line 200 of file channel_layout.c.
Referenced by channelmap_config_input(), channelmap_init(), join_config_output(), parse_maps(), and read_restart_header().
uint64_t av_channel_layout_extract_channel | ( | uint64_t | channel_layout, |
int | index | ||
) |
Get the channel with the given index in channel_layout.
Definition at line 221 of file channel_layout.c.
Referenced by filter_frame(), guess_map_any(), init(), join_config_output(), join_init(), and query_formats().
const char* av_get_channel_name | ( | uint64_t | channel | ) |
Get the name of a given channel.
Definition at line 210 of file channel_layout.c.
Referenced by channelmap_config_input(), init(), and join_config_output().