#include "avutil.h"Go to the source code of this file.
Enumerations | |
| enum | AVSampleFormat { AV_SAMPLE_FMT_NONE = -1, AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8P, AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NB } |
| all in native-endian format More... | |
Functions | |
| const char * | av_get_sample_fmt_name (enum AVSampleFormat sample_fmt) |
| Return the name of sample_fmt, or NULL if sample_fmt is not recognized. | |
| enum AVSampleFormat | av_get_sample_fmt (const char *name) |
| Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error. | |
| enum AVSampleFormat | av_get_alt_sample_fmt (enum AVSampleFormat sample_fmt, int planar) |
| Return the planar<->packed alternative form of the given sample format, or AV_SAMPLE_FMT_NONE on error. | |
| char * | av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt) |
| Generate a string corresponding to the sample format with sample_fmt, or a header if sample_fmt is negative. | |
| attribute_deprecated int | av_get_bits_per_sample_fmt (enum AVSampleFormat sample_fmt) |
| int | av_get_bytes_per_sample (enum AVSampleFormat sample_fmt) |
| Return number of bytes per sample. | |
| int | av_sample_fmt_is_planar (enum AVSampleFormat sample_fmt) |
| Check if the sample format is planar. | |
| int | av_samples_get_buffer_size (int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align) |
| Get the required buffer size for the given audio parameters. | |
| int | av_samples_fill_arrays (uint8_t **audio_data, int *linesize, uint8_t *buf, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align) |
| Fill channel data pointers and linesize for samples with sample format sample_fmt. | |
| int | av_samples_alloc (uint8_t **audio_data, int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align) |
| Allocate a samples buffer for nb_samples samples, and fill data pointers and linesize accordingly. | |
| enum AVSampleFormat |
all in native-endian format
Definition at line 27 of file samplefmt.h.
| enum AVSampleFormat av_get_alt_sample_fmt | ( | enum AVSampleFormat | sample_fmt, | |
| int | planar | |||
| ) |
Return the planar<->packed alternative form of the given sample format, or AV_SAMPLE_FMT_NONE on error.
If the passed sample_fmt is already in the requested planar/packed format, the format returned is the same as the input.
Definition at line 63 of file samplefmt.c.
Referenced by avfilter_default_get_audio_buffer(), get(), main(), set(), and swr_init().
| attribute_deprecated int av_get_bits_per_sample_fmt | ( | enum AVSampleFormat | sample_fmt | ) |
| int av_get_bytes_per_sample | ( | enum AVSampleFormat | sample_fmt | ) |
Return number of bytes per sample.
| sample_fmt | the sample format |
Definition at line 85 of file samplefmt.c.
Referenced by audio_decode_frame(), av_asrc_buffer_add_buffer(), av_audio_resample_init(), av_get_bits_per_sample_format(), av_samples_get_buffer_size(), config_output(), decode_frame(), decode_init(), do_audio_out(), encode_audio_frame(), filter_samples(), flush_encoders(), init_buffers(), lavfi_read_packet(), mkv_write_tracks(), REMATRIX_FUNC_SIG(), sdl_audio_callback(), setup_array(), swr_init(), transcode_audio(), vmdaudio_decode_init(), and wavpack_decode_block().
| enum AVSampleFormat av_get_sample_fmt | ( | const char * | name | ) |
Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error.
Definition at line 53 of file samplefmt.c.
Referenced by avcodec_get_sample_fmt(), ff_parse_sample_format(), and new_audio_stream().
| const char* av_get_sample_fmt_name | ( | enum AVSampleFormat | sample_fmt | ) |
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition at line 46 of file samplefmt.c.
Referenced by audio_decode_frame(), av_audio_resample_init(), avcodec_get_sample_fmt_name(), avcodec_string(), choose_sample_fmt(), config_output(), do_audio_out(), dprint_options(), ff_dlog_link(), filter_samples(), init(), log_input_change(), main(), print_digraph(), show_frame(), show_stream(), snprint_link_prop(), swr_init(), and transcode_audio().
| char* av_get_sample_fmt_string | ( | char * | buf, | |
| int | buf_size, | |||
| enum AVSampleFormat | sample_fmt | |||
| ) |
Generate a string corresponding to the sample format with sample_fmt, or a header if sample_fmt is negative.
| buf | the buffer where to write the string | |
| buf_size | the size of buf | |
| sample_fmt | the number of the sample format to print the corresponding info string, or a negative value to print the corresponding header. |
Definition at line 72 of file samplefmt.c.
Referenced by avcodec_sample_fmt_string(), and show_sample_fmts().
| int av_sample_fmt_is_planar | ( | enum AVSampleFormat | sample_fmt | ) |
Check if the sample format is planar.
| sample_fmt | the sample format to inspect |
Definition at line 99 of file samplefmt.c.
Referenced by av_samples_fill_arrays(), av_samples_get_buffer_size(), avcodec_decode_audio3(), avcodec_fill_audio_frame(), get(), set(), setup_array(), and swr_init().
| int av_samples_alloc | ( | uint8_t ** | audio_data, | |
| int * | linesize, | |||
| int | nb_channels, | |||
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| int | align | |||
| ) |
Allocate a samples buffer for nb_samples samples, and fill data pointers and linesize accordingly.
The allocated samples buffer can be freed by using av_freep(&audio_data[0])
| [out] | audio_data | array to be filled with the pointer for each channel |
| [out] | linesize | aligned size for audio buffer(s) |
| nb_channels | number of audio channels | |
| nb_samples | number of samples per channel | |
| align | buffer size alignment (1 = no alignment required) |
Definition at line 149 of file samplefmt.c.
Referenced by avfilter_default_get_audio_buffer(), and init_buffers().
| int av_samples_fill_arrays | ( | uint8_t ** | audio_data, | |
| int * | linesize, | |||
| uint8_t * | buf, | |||
| int | nb_channels, | |||
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| int | align | |||
| ) |
Fill channel data pointers and linesize for samples with sample format sample_fmt.
The pointers array is filled with the pointers to the samples data: for planar, set the start point of each channel's data within the buffer, for packed, set the start point of the entire buffer only.
The linesize array is filled with the aligned size of each channel's data buffer for planar layout, or the aligned size of the buffer for all channels for packed layout.
| [out] | audio_data | array to be filled with the pointer for each channel |
| [out] | linesize | calculated linesize |
| buf | the pointer to a buffer containing the samples | |
| nb_channels | the number of channels | |
| nb_samples | the number of samples in a single channel | |
| sample_fmt | the sample format | |
| align | buffer size alignment (1 = no alignment required) |
Definition at line 130 of file samplefmt.c.
Referenced by av_asrc_buffer_add_buffer(), av_samples_alloc(), and avcodec_fill_audio_frame().
| int av_samples_get_buffer_size | ( | int * | linesize, | |
| int | nb_channels, | |||
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| int | align | |||
| ) |
Get the required buffer size for the given audio parameters.
| [out] | linesize | calculated linesize, may be NULL |
| nb_channels | the number of channels | |
| nb_samples | the number of samples in a single channel | |
| sample_fmt | the sample format |
Definition at line 106 of file samplefmt.c.
Referenced by audio_decode_example(), audio_decode_frame(), audio_get_buffer(), av_samples_alloc(), av_samples_fill_arrays(), avcodec_decode_audio3(), avcodec_encode_audio(), avcodec_fill_audio_frame(), and sdl_audio_callback().
1.5.8