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FFmpeg
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Public Attributes | |
| const AVClass * | av_class |
| AVClass used for AVOption and av_log() | |
| int | log_level_offset |
| logging level offset | |
| void * | log_ctx |
| parent logging context | |
| enum AVSampleFormat | in_sample_fmt |
| input sample format | |
| enum AVSampleFormat | int_sample_fmt |
| internal sample format (AV_SAMPLE_FMT_FLTP or AV_SAMPLE_FMT_S16P) | |
| enum AVSampleFormat | out_sample_fmt |
| output sample format | |
| int64_t | in_ch_layout |
| input channel layout | |
| int64_t | out_ch_layout |
| output channel layout | |
| int | in_sample_rate |
| input sample rate | |
| int | out_sample_rate |
| output sample rate | |
| int | flags |
| miscellaneous flags such as SWR_FLAG_RESAMPLE | |
| float | slev |
| surround mixing level | |
| float | clev |
| center mixing level | |
| float | lfe_mix_level |
| LFE mixing level. | |
| float | rematrix_volume |
| rematrixing volume coefficient | |
| float | rematrix_maxval |
| maximum value for rematrixing output | |
| int | matrix_encoding |
| matrixed stereo encoding | |
| const int * | channel_map |
| channel index (or -1 if muted channel) map | |
| int | used_ch_count |
| number of used input channels (mapped channel count if channel_map, otherwise in.ch_count) | |
| int | engine |
| int | user_in_ch_count |
| User set input channel count. | |
| int | user_out_ch_count |
| User set output channel count. | |
| int | user_used_ch_count |
| User set used channel count. | |
| int64_t | user_in_ch_layout |
| User set input channel layout. | |
| int64_t | user_out_ch_layout |
| User set output channel layout. | |
| enum AVSampleFormat | user_int_sample_fmt |
| User set internal sample format. | |
| int | user_dither_method |
| User set dither method. | |
| struct DitherContext | dither |
| int | filter_size |
| length of each FIR filter in the resampling filterbank relative to the cutoff frequency | |
| int | phase_shift |
| log2 of the number of entries in the resampling polyphase filterbank | |
| int | linear_interp |
| if 1 then the resampling FIR filter will be linearly interpolated | |
| int | exact_rational |
| if 1 then enable non power of 2 phase_count | |
| double | cutoff |
| resampling cutoff frequency (swr: 6dB point; soxr: 0dB point). More... | |
| int | filter_type |
| swr resampling filter type | |
| double | kaiser_beta |
| swr beta value for Kaiser window (only applicable if filter_type == AV_FILTER_TYPE_KAISER) | |
| double | precision |
| soxr resampling precision (in bits) | |
| int | cheby |
| soxr: if 1 then passband rolloff will be none (Chebyshev) & irrational ratio approximation precision will be higher | |
| float | min_compensation |
| swr minimum below which no compensation will happen | |
| float | min_hard_compensation |
| swr minimum below which no silence inject / sample drop will happen | |
| float | soft_compensation_duration |
| swr duration over which soft compensation is applied | |
| float | max_soft_compensation |
| swr maximum soft compensation in seconds over soft_compensation_duration | |
| float | async |
| swr simple 1 parameter async, similar to ffmpegs -async | |
| int64_t | firstpts_in_samples |
| swr first pts in samples | |
| int | resample_first |
| 1 if resampling must come first, 0 if rematrixing | |
| int | rematrix |
| flag to indicate if rematrixing is needed (basically if input and output layouts mismatch) | |
| int | rematrix_custom |
| flag to indicate that a custom matrix has been defined | |
| AudioData | in |
| input audio data | |
| AudioData | postin |
| post-input audio data: used for rematrix/resample | |
| AudioData | midbuf |
| intermediate audio data (postin/preout) | |
| AudioData | preout |
| pre-output audio data: used for rematrix/resample | |
| AudioData | out |
| converted output audio data | |
| AudioData | in_buffer |
| cached audio data (convert and resample purpose) | |
| AudioData | silence |
| temporary with silence | |
| AudioData | drop_temp |
| temporary used to discard output | |
| int | in_buffer_index |
| cached buffer position | |
| int | in_buffer_count |
| cached buffer length | |
| int | resample_in_constraint |
| 1 if the input end was reach before the output end, 0 otherwise | |
| int | flushed |
| 1 if data is to be flushed and no further input is expected | |
| int64_t | outpts |
| output PTS | |
| int64_t | firstpts |
| first PTS | |
| int | drop_output |
| number of output samples to drop | |
| double | delayed_samples_fixup |
| soxr 0.1.1: needed to fixup delayed_samples after flush has been called. | |
| struct AudioConvert * | in_convert |
| input conversion context | |
| struct AudioConvert * | out_convert |
| output conversion context | |
| struct AudioConvert * | full_convert |
| full conversion context (single conversion for input and output) | |
| struct ResampleContext * | resample |
| resampling context | |
| struct Resampler const * | resampler |
| resampler virtual function table | |
| double | matrix [SWR_CH_MAX][SWR_CH_MAX] |
| floating point rematrixing coefficients | |
| float | matrix_flt [SWR_CH_MAX][SWR_CH_MAX] |
| single precision floating point rematrixing coefficients | |
| uint8_t * | native_matrix |
| uint8_t * | native_one |
| uint8_t * | native_simd_one |
| uint8_t * | native_simd_matrix |
| int32_t | matrix32 [SWR_CH_MAX][SWR_CH_MAX] |
| 17.15 fixed point rematrixing coefficients | |
| uint8_t | matrix_ch [SWR_CH_MAX][SWR_CH_MAX+1] |
| Lists of input channels per output channel that have non zero rematrixing coefficients. | |
| mix_1_1_func_type * | mix_1_1_f |
| mix_1_1_func_type * | mix_1_1_simd |
| mix_2_1_func_type * | mix_2_1_f |
| mix_2_1_func_type * | mix_2_1_simd |
| mix_any_func_type * | mix_any_f |
| double SwrContext::cutoff |
resampling cutoff frequency (swr: 6dB point; soxr: 0dB point).
1.0 corresponds to half the output sample rate
1.8.12