MP3 Decoder using https://github.com/pschatzmann/minimp3. This decoder does not provide any good results and it is not suited to decode any audio above 32000 on an ESP32. So the sample rate is limited by the MINIMP3_MAX_SAMPLE_RATE variable. More...
#include <CodecMP3Mini.h>
Inheritance diagram for MP3DecoderMini:
Public Member Functions | |
| ~MP3DecoderMini () | |
| Destroy the MP3DecoderMini object. | |
| virtual void | addNotifyAudioChange (AudioInfoSupport &bi) |
| Adds target to be notified about audio changes. | |
| virtual AudioInfo | audioInfo () |
| provides the actual input AudioInfo | |
| virtual AudioInfo | audioInfoOut () |
| provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream | |
| bool | begin () |
| Starts the processing. | |
| virtual bool | begin (AudioInfo info) override |
| virtual void | clearNotifyAudioChange () |
| Deletes all change notify subscriptions. | |
| void | end () |
| Releases the reserved memory. | |
| void | flush () |
| Decodes the last outstanding data. | |
| bool | isNotifyActive () |
| Checks if the automatic AudioInfo update is active. | |
| virtual bool | isResultPCM () |
| Returns true to indicate that the decoding result is PCM data. | |
| virtual | operator bool () |
| checks if the class is active | |
| virtual bool | removeNotifyAudioChange (AudioInfoSupport &bi) |
| Removes a target in order not to be notified about audio changes. | |
| virtual void | setAudioInfo (AudioInfo from) override |
| for most decoders this is not needed | |
| void | setBufferLength (int len) |
| void | setNotifyActive (bool flag) |
| Deactivate/Reactivate automatic AudioInfo updates: (default is active) | |
| virtual void | setOutput (AudioOutput &out_stream) |
| Defines where the decoded result is written to. | |
| virtual void | setOutput (AudioStream &out_stream) |
| Defines where the decoded result is written to. | |
| void | setOutput (Print &outStream) |
| Defines the output Stream. | |
| void | setSampleRateLimit (int limit) |
| size_t | write (const uint8_t *data, size_t len) |
| Write mp3 data to decoder. | |
Public Attributes | |
| int | id |
| custom id to be used by application | |
Protected Member Functions | |
| void | decode (int write_len) |
| Process single bytes so that we can decode a full frame when it is available. | |
| void | f32_to_s16 (float *in, int16_t *out, int num_samples) |
| void | notifyAudioChange (AudioInfo info) |
| void | provideResult (int samples) |
| Provides Metadata and PCM data. | |
| void | writeBlocking (Print *out, uint8_t *data, size_t len) |
Protected Attributes | |
| bool | active |
| Vector< uint8_t > | buffer |
| size_t | buffer_pos = 0 |
| size_t | buffer_size = 5 * 1024 |
| AudioInfo | info |
| bool | is_notify_active = true |
| mp3dec_t | mp3d |
| mp3dec_frame_info_t | mp3dec_info |
| Vector< AudioInfoSupport * > | notify_vector |
| Print * | out = nullptr |
| Print * | p_print = nullptr |
| Vector< mp3d_sample_t > | pcm |
| int | sample_rate_limit = 44100 |
Detailed Description
MP3 Decoder using https://github.com/pschatzmann/minimp3. This decoder does not provide any good results and it is not suited to decode any audio above 32000 on an ESP32. So the sample rate is limited by the MINIMP3_MAX_SAMPLE_RATE variable.
- Copyright
- GPLv3
The documentation for this class was generated from the following file:
- src/AudioTools/AudioCodecs/CodecMP3Mini.h
