audio_chunk Class Reference
Interface to container of a chunk of audio data. See audio_chunk_impl for an implementation. More...
#include <audio_chunk.h>
Public Types | |
| enum | { channel_front_left = 1<<0, channel_front_right = 1<<1, channel_front_center = 1<<2, channel_lfe = 1<<3, channel_back_left = 1<<4, channel_back_right = 1<<5, channel_front_center_left = 1<<6, channel_front_center_right = 1<<7, channel_back_center = 1<<8, channel_side_left = 1<<9, channel_side_right = 1<<10, channel_top_center = 1<<11, channel_top_front_left = 1<<12, channel_top_front_center = 1<<13, channel_top_front_right = 1<<14, channel_top_back_left = 1<<15, channel_top_back_center = 1<<16, channel_top_back_right = 1<<17, channel_config_mono = channel_front_center, channel_config_stereo = channel_front_left | channel_front_right, channel_config_5point1 = channel_front_left | channel_front_right | channel_back_left | channel_back_right | channel_front_center | channel_lfe, defined_channel_count = 18 } |
| Channel map flag declarations. Note that order of interleaved channel data in the stream is same as order of these flags. More... | |
| enum | { FLAG_LITTLE_ENDIAN = 1, FLAG_BIG_ENDIAN = 2, FLAG_SIGNED = 4, FLAG_UNSIGNED = 8 } |
Public Member Functions | |
| virtual audio_sample * | get_data ()=0 |
| virtual const audio_sample * | get_data () const =0 |
| virtual t_size | get_data_size () const =0 |
| Retrieves size of allocated buffer space, in audio_samples. | |
| virtual void | set_data_size (t_size p_new_size)=0 |
| Resizes audio data buffer to specified size. Throws std::bad_alloc on failure. | |
| virtual unsigned | get_srate () const =0 |
| Retrieves sample rate of contained audio data. | |
| virtual void | set_srate (unsigned val)=0 |
| Sets sample rate of contained audio data. | |
| virtual unsigned | get_channels () const =0 |
| Retrieves channel count of contained audio data. | |
| virtual unsigned | get_channel_config () const =0 |
| Retrieves channel map of contained audio data. Conditions where number of channels specified by channel map don't match get_channels() return value should not be possible. | |
| virtual void | set_channels (unsigned p_count, unsigned p_config)=0 |
| Sets channel count / channel map. | |
| virtual t_size | get_sample_count () const =0 |
| virtual void | set_sample_count (t_size val)=0 |
| Sets number of valid samples in the buffer. WARNING: sample count * channel count should never be above allocated buffer size. | |
| unsigned | get_sample_rate () const |
| Helper, same as get_srate(). | |
| void | set_sample_rate (unsigned val) |
| Helper, same as set_srate(). | |
| void | set_channels (unsigned val) |
| Helper; sets channel count to specified value and uses default channel map for this channel count. | |
| void | grow_data_size (t_size p_requested) |
| Helper; resizes audio data buffer when it's current size is smaller than requested. | |
| double | get_duration () const |
| Retrieves duration of contained audio data, in seconds. | |
| bool | is_empty () const |
| Returns whether the chunk is empty (contains no audio data). | |
| bool | is_valid () const |
| Returns whether the chunk contents are valid (for bug check purposes). | |
| t_size | get_data_length () const |
| Returns actual amount of audio data contained in the buffer (sample count * channel count). Must not be greater than data size (see get_data_size()). | |
| void | reset () |
| Resets all audio_chunk data. | |
| void | set_data (const audio_sample *src, t_size samples, unsigned nch, unsigned srate, unsigned channel_config) |
| Helper, sets chunk data to contents of specified buffer, with specified number of channels / sample rate / channel map. | |
| void | set_data (const audio_sample *src, t_size samples, unsigned nch, unsigned srate) |
| Helper, sets chunk data to contents of specified buffer, with specified number of channels / sample rate, using default channel map for specified channel count. | |
| void | set_data_fixedpoint (const void *ptr, t_size bytes, unsigned srate, unsigned nch, unsigned bps, unsigned channel_config) |
| Helper, sets chunk data to contents of specified buffer, using default win32/wav conventions for signed/unsigned switch. | |
| void | set_data_fixedpoint_unsigned (const void *ptr, t_size bytes, unsigned srate, unsigned nch, unsigned bps, unsigned channel_config) |
| void | set_data_fixedpoint_signed (const void *ptr, t_size bytes, unsigned srate, unsigned nch, unsigned bps, unsigned channel_config) |
| void | set_data_fixedpoint_ex (const void *ptr, t_size bytes, unsigned p_sample_rate, unsigned p_channels, unsigned p_bits_per_sample, unsigned p_flags, unsigned p_channel_config) |
| void | set_data_floatingpoint_ex (const void *ptr, t_size bytes, unsigned p_sample_rate, unsigned p_channels, unsigned p_bits_per_sample, unsigned p_flags, unsigned p_channel_config) |
| void | set_data_32 (const float *src, t_size samples, unsigned nch, unsigned srate) |
| void | pad_with_silence_ex (t_size samples, unsigned hint_nch, unsigned hint_srate) |
| void | pad_with_silence (t_size samples) |
| void | insert_silence_fromstart (t_size samples) |
| t_size | skip_first_samples (t_size samples) |
| audio_sample | get_peak (audio_sample p_peak=0) const |
| Helper, calculates peak value of data in the chunk. The optional parameter specifies initial peak value, to simplify calling code. | |
| void | scale (audio_sample p_value) |
| Helper function; scales entire chunk content by specified value. | |
| void | copy (const audio_chunk &p_source) |
| Helper; copies content of another audio chunk to this chunk. | |
| const audio_chunk & | operator= (const audio_chunk &p_source) |
Static Public Member Functions | |
| static unsigned | g_guess_channel_config (unsigned count) |
| Helper function; guesses default channel map for specified channel count. | |
| static unsigned | g_extract_channel_flag (unsigned p_config, unsigned p_index) |
| Extracts flag describing Nth channel from specified map. Usable to figure what specific channel in a stream means. | |
| static unsigned | g_count_channels (unsigned p_config) |
| Counts channels specified by channel map. | |
| static unsigned | g_channel_index_from_flag (unsigned p_config, unsigned p_flag) |
| Calculates index of a channel specified by p_flag in a stream where channel map is described by p_config. | |
| static unsigned | flags_autoendian () |
Protected Member Functions | |
| audio_chunk () | |
| ~audio_chunk () | |
Detailed Description
Interface to container of a chunk of audio data. See audio_chunk_impl for an implementation.Member Enumeration Documentation
| anonymous enum |
Channel map flag declarations. Note that order of interleaved channel data in the stream is same as order of these flags.
- Enumerator:
Constructor & Destructor Documentation
| audio_chunk::audio_chunk | ( | ) | [inline, protected] |
| audio_chunk::~audio_chunk | ( | ) | [inline, protected] |
Member Function Documentation
| static unsigned audio_chunk::g_guess_channel_config | ( | unsigned | count | ) | [static] |
Helper function; guesses default channel map for specified channel count.
| static unsigned audio_chunk::g_extract_channel_flag | ( | unsigned | p_config, | |
| unsigned | p_index | |||
| ) | [static] |
Extracts flag describing Nth channel from specified map. Usable to figure what specific channel in a stream means.
| static unsigned audio_chunk::g_count_channels | ( | unsigned | p_config | ) | [static] |
Counts channels specified by channel map.
| static unsigned audio_chunk::g_channel_index_from_flag | ( | unsigned | p_config, | |
| unsigned | p_flag | |||
| ) | [static] |
Calculates index of a channel specified by p_flag in a stream where channel map is described by p_config.
| virtual audio_sample* audio_chunk::get_data | ( | ) | [pure virtual] |
Retrieves audio data buffer pointer (non-const version). Returned pointer is for temporary use only; it is valid until next set_data_size call, or until the object is destroyed.
Size of returned buffer is equal to get_data_size() return value (in audio_samples). Amount of actual data may be smaller, depending on sample count and channel count. Conditions where sample count * channel count are greater than data size should not be possible.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual const audio_sample* audio_chunk::get_data | ( | ) | const [pure virtual] |
Retrieves audio data buffer pointer (const version). Returned pointer is for temporary use only; it is valid until next set_data_size call, or until the object is destroyed.
Size of returned buffer is equal to get_data_size() return value (in audio_samples). Amount of actual data may be smaller, depending on sample count and channel count. Conditions where sample count * channel count are greater than data size should not be possible.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual t_size audio_chunk::get_data_size | ( | ) | const [pure virtual] |
Retrieves size of allocated buffer space, in audio_samples.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual void audio_chunk::set_data_size | ( | t_size | p_new_size | ) | [pure virtual] |
Resizes audio data buffer to specified size. Throws std::bad_alloc on failure.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual unsigned audio_chunk::get_srate | ( | ) | const [pure virtual] |
Retrieves sample rate of contained audio data.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual void audio_chunk::set_srate | ( | unsigned | val | ) | [pure virtual] |
Sets sample rate of contained audio data.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual unsigned audio_chunk::get_channels | ( | ) | const [pure virtual] |
Retrieves channel count of contained audio data.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual unsigned audio_chunk::get_channel_config | ( | ) | const [pure virtual] |
Retrieves channel map of contained audio data. Conditions where number of channels specified by channel map don't match get_channels() return value should not be possible.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual void audio_chunk::set_channels | ( | unsigned | p_count, | |
| unsigned | p_config | |||
| ) | [pure virtual] |
Sets channel count / channel map.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual t_size audio_chunk::get_sample_count | ( | ) | const [pure virtual] |
Retrieves number of valid samples in the buffer.
Note that a "sample" means a unit of interleaved PCM data representing states of each channel at given point of time, not a single PCM value.
For an example, duration of contained audio data is equal to sample count / sample rate, while actual size of contained data is equal to sample count * channel count.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| virtual void audio_chunk::set_sample_count | ( | t_size | val | ) | [pure virtual] |
Sets number of valid samples in the buffer. WARNING: sample count * channel count should never be above allocated buffer size.
Implemented in audio_chunk_impl_t< t_alloc >, and audio_chunk_temp_impl.
| unsigned audio_chunk::get_sample_rate | ( | ) | const [inline] |
Helper, same as get_srate().
| void audio_chunk::set_sample_rate | ( | unsigned | val | ) | [inline] |
Helper, same as set_srate().
| void audio_chunk::set_channels | ( | unsigned | val | ) | [inline] |
Helper; sets channel count to specified value and uses default channel map for this channel count.
Reimplemented in audio_chunk_impl_t< t_alloc >.
| void audio_chunk::grow_data_size | ( | t_size | p_requested | ) | [inline] |
Helper; resizes audio data buffer when it's current size is smaller than requested.
| double audio_chunk::get_duration | ( | ) | const [inline] |
Retrieves duration of contained audio data, in seconds.
| bool audio_chunk::is_empty | ( | ) | const [inline] |
Returns whether the chunk is empty (contains no audio data).
| bool audio_chunk::is_valid | ( | ) | const |
Returns whether the chunk contents are valid (for bug check purposes).
| t_size audio_chunk::get_data_length | ( | ) | const [inline] |
Returns actual amount of audio data contained in the buffer (sample count * channel count). Must not be greater than data size (see get_data_size()).
| void audio_chunk::reset | ( | ) | [inline] |
Resets all audio_chunk data.
| void audio_chunk::set_data | ( | const audio_sample * | src, | |
| t_size | samples, | |||
| unsigned | nch, | |||
| unsigned | srate, | |||
| unsigned | channel_config | |||
| ) |
Helper, sets chunk data to contents of specified buffer, with specified number of channels / sample rate / channel map.
| void audio_chunk::set_data | ( | const audio_sample * | src, | |
| t_size | samples, | |||
| unsigned | nch, | |||
| unsigned | srate | |||
| ) | [inline] |
Helper, sets chunk data to contents of specified buffer, with specified number of channels / sample rate, using default channel map for specified channel count.
| void audio_chunk::set_data_fixedpoint | ( | const void * | ptr, | |
| t_size | bytes, | |||
| unsigned | srate, | |||
| unsigned | nch, | |||
| unsigned | bps, | |||
| unsigned | channel_config | |||
| ) | [inline] |
Helper, sets chunk data to contents of specified buffer, using default win32/wav conventions for signed/unsigned switch.
| void audio_chunk::set_data_fixedpoint_unsigned | ( | const void * | ptr, | |
| t_size | bytes, | |||
| unsigned | srate, | |||
| unsigned | nch, | |||
| unsigned | bps, | |||
| unsigned | channel_config | |||
| ) | [inline] |
| void audio_chunk::set_data_fixedpoint_signed | ( | const void * | ptr, | |
| t_size | bytes, | |||
| unsigned | srate, | |||
| unsigned | nch, | |||
| unsigned | bps, | |||
| unsigned | channel_config | |||
| ) | [inline] |
| static unsigned audio_chunk::flags_autoendian | ( | ) | [inline, static] |
| void audio_chunk::set_data_fixedpoint_ex | ( | const void * | ptr, | |
| t_size | bytes, | |||
| unsigned | p_sample_rate, | |||
| unsigned | p_channels, | |||
| unsigned | p_bits_per_sample, | |||
| unsigned | p_flags, | |||
| unsigned | p_channel_config | |||
| ) |
| void audio_chunk::set_data_floatingpoint_ex | ( | const void * | ptr, | |
| t_size | bytes, | |||
| unsigned | p_sample_rate, | |||
| unsigned | p_channels, | |||
| unsigned | p_bits_per_sample, | |||
| unsigned | p_flags, | |||
| unsigned | p_channel_config | |||
| ) |
| void audio_chunk::set_data_32 | ( | const float * | src, | |
| t_size | samples, | |||
| unsigned | nch, | |||
| unsigned | srate | |||
| ) | [inline] |
| void audio_chunk::pad_with_silence_ex | ( | t_size | samples, | |
| unsigned | hint_nch, | |||
| unsigned | hint_srate | |||
| ) |
| void audio_chunk::pad_with_silence | ( | t_size | samples | ) |
| void audio_chunk::insert_silence_fromstart | ( | t_size | samples | ) |
| audio_sample audio_chunk::get_peak | ( | audio_sample | p_peak = 0 |
) | const |
Helper, calculates peak value of data in the chunk. The optional parameter specifies initial peak value, to simplify calling code.
| void audio_chunk::scale | ( | audio_sample | p_value | ) |
Helper function; scales entire chunk content by specified value.
| void audio_chunk::copy | ( | const audio_chunk & | p_source | ) | [inline] |
Helper; copies content of another audio chunk to this chunk.
| const audio_chunk& audio_chunk::operator= | ( | const audio_chunk & | p_source | ) | [inline] |
Reimplemented in audio_chunk_impl_t< t_alloc >.
The documentation for this class was generated from the following file:
- foobar2000/SDK/audio_chunk.h
