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ffmpeg_core.h
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ffmpeg_core.h
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#ifndef _MUSICPLAYER2_FFMPEG_CORE_H
#define _MUSICPLAYER2_FFMPEG_CORE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stddef.h>
#include <wchar.h>
#include <stdarg.h>
#if _WIN32
#define CORE_CHAR wchar_t
#define CCORE_CHAR(x) L##x
#else
#define CORE_CHAR char
#define CCORE_CHAR(x) x
#endif
#if _WIN32
#if BUILD_FFMPEG_CORE
#define FFMPEG_CORE_API __declspec(dllexport)
#else
#define FFMPEG_CORE_API __declspec(dllimport)
#endif
#elif defined(__GNUC__)
#define FFMPEG_CORE_API __attribute__((visibility("default")))
#else
#define FFMPEG_CORE_API
#endif
typedef struct MusicHandle MusicHandle;
typedef struct MusicInfoHandle MusicInfoHandle;
typedef struct FfmpegCoreSettings FfmpegCoreSettings;
typedef struct DeviceNameList {
char* device;
struct DeviceNameList* prev;
struct DeviceNameList* next;
} DeviceNameList;
// 负数即为来自ffmpeg的错误
#define FFMPEG_CORE_ERR_OK 0
#define FFMPEG_CORE_ERR_NULLPTR 1
#define FFMPEG_CORE_ERR_INVAILD_NAME 2
#define FFMPEG_CORE_ERR_OOM 3
#define FFMPEG_CORE_ERR_NO_AUDIO_OR_DECODER 4
#define FFMPEG_CORE_ERR_UNKNOWN_SAMPLE_FMT 5
#define FFMPEG_CORE_ERR_SDL 6
#define FFMPEG_CORE_ERR_FAILED_CREATE_THREAD 7
#define FFMPEG_CORE_ERR_FAILED_CREATE_MUTEX 8
#define FFMPEG_CORE_ERR_WAIT_MUTEX_FAILED 9
#define FFMPEG_CORE_ERR_NO_AUDIO 10
#define FFMPEG_CORE_ERR_FAILED_SET_VOLUME 11
#define FFMPEG_CORE_ERR_FAILED_SET_SPEED 12
#define FFMPEG_CORE_ERR_TOO_BIG_FFT_DATA_LEN 13
#define FFMPEG_CORE_ERR_FAILED_OPEN_FILE 14
#define FFMPEG_CORE_ERR_FAILED_READ_FILE 15
#define FFMPEG_CORE_ERR_INVALID_CDA_FILE 16
#define FFMPEG_CORE_ERR_NO_LIBCDIO 17
#define FFMEPG_CORE_ERR_FAILED_PARSE_URL 18
#define FFMPEG_CORE_ERR_FAILED_SET_EQUALIZER_CHANNEL 19
#define FFMPEG_CORE_ERR_FAILED_INIT_WASAPI 20
#define FFMEPG_CORE_ERR_FAILED_GET_WASAPI_DEVICE_PROP 21
#define FFMPEG_CORE_ERR_WASAPI_NOT_INITED 22
#define FFMPEG_CORE_ERR_WASAPI_DEVICE_NOT_FOUND 23
#define FFMPEG_CORE_ERR_WASAPI_FAILED_OPEN_DEVICE 24
#define FFMPEG_CORE_ERR_INVALID_DEVICE_NAME 25
#define FFMPEG_CORE_ERR_WASAPI_NO_SUITABLE_FORMAT 26
#define FFMPEG_CORE_ERR_FAILED_CREATE_EVENT 27
#define FFMPEG_CORE_ERR_TIMEOUT 28
#define FFMPEG_CORE_ERR_WAIT_TIMEOUT 29
#define REVERB_TYPE_OFF 0
#define REVERB_TYPE_ROOM 1
#define REVERB_TYPE_MAX 1
#define MATRIX_ENCODING_NONE 0
#define MATRIX_ENCODING_DOLBY 1
#define MATRIX_ENCODING_DPLII 2
#define MATRIX_ENCODING_DPLIIX 3
#define MATRIX_ENCODING_DPLIIZ 4
#define MATRIX_ENCODING_DOLBYEX 5
#define MATRIX_ENCODING_DOLBYHEADPHONE 6
#define MATRIX_ENCODING_NB 7
FFMPEG_CORE_API void free_music_handle(MusicHandle* handle);
FFMPEG_CORE_API void free_music_info_handle(MusicInfoHandle* handle);
FFMPEG_CORE_API void free_ffmpeg_core_settings(FfmpegCoreSettings* s);
FFMPEG_CORE_API void free_device_name_list(DeviceNameList** list);
FFMPEG_CORE_API void ffmpeg_core_free(void* data);
FFMPEG_CORE_API void* ffmpeg_core_malloc(size_t size);
FFMPEG_CORE_API void* ffmpeg_core_realloc(void* data, size_t size);
/// 即 av_log_format_line2
FFMPEG_CORE_API int ffmpeg_core_log_format_line(void* ptr, int level, const char* fmt, va_list vl, char* line, int line_size, int* print_prefix);
/// 即 av_log_set_callback
FFMPEG_CORE_API void ffmpeg_core_log_set_callback(void(*callback)(void*, int, const char*, va_list));
/// 即 av_log_set_flags
FFMPEG_CORE_API void ffmpeg_core_log_set_flags(int arg);
FFMPEG_CORE_API const char* ffmpeg_core_version_str();
FFMPEG_CORE_API int32_t ffmpeg_core_version();
FFMPEG_CORE_API int ffmpeg_core_is_wasapi_supported();
FFMPEG_CORE_API void ffmpeg_core_dump_library_version(int use_av_log, int av_log_level);
FFMPEG_CORE_API void ffmpeg_core_dump_ffmpeg_configuration(int use_av_log, int av_log_level);
FFMPEG_CORE_API int ffmpeg_core_open(const CORE_CHAR* url, MusicHandle** handle);
FFMPEG_CORE_API int ffmpeg_core_open2(const CORE_CHAR* url, MusicHandle** handle, FfmpegCoreSettings* s);
FFMPEG_CORE_API int ffmpeg_core_open3(const CORE_CHAR* url, MusicHandle** handle, FfmpegCoreSettings* s, const CORE_CHAR* device);
FFMPEG_CORE_API int ffmpeg_core_info_open(const CORE_CHAR* url, MusicInfoHandle** handle);
FFMPEG_CORE_API int ffmpeg_core_play(MusicHandle* handle);
FFMPEG_CORE_API int ffmpeg_core_pause(MusicHandle* handle);
FFMPEG_CORE_API int ffmpeg_core_seek(MusicHandle* handle, int64_t time);
FFMPEG_CORE_API int ffmpeg_core_set_volume(MusicHandle* handle, int volume);
FFMPEG_CORE_API int ffmpeg_core_set_speed(MusicHandle* handle, float speed);
FFMPEG_CORE_API int ffmpeg_core_set_equalizer_channel(MusicHandle* handle, int channel, int gain);
FFMPEG_CORE_API int ffmpeg_core_set_reverb(MusicHandle* handle, int type, float mix, float time);
FFMPEG_CORE_API int ffmpeg_core_get_error(MusicHandle* handle);
/**
* @brief 返回错误代码对应的错误消息
* @param err 错误代码
* @return 错误消息，需要调用free释放内存
*/
FFMPEG_CORE_API CORE_CHAR* ffmpeg_core_get_err_msg(int err);
/**
* @brief 返回错误代码对应的错误消息
* @param err 错误代码（仅处理>=0的错误）
* @return 错误消息
*/
FFMPEG_CORE_API const CORE_CHAR* ffmpeg_core_get_err_msg2(int err);
/**
* @brief 获取当前播放位置
* @param handle Handle
* @return 如果Handle为NULL，返回-1，反之返回以AV_TIME_BASE为基准的时间（1相当于1/1000000s)
*/
FFMPEG_CORE_API int64_t ffmpeg_core_get_cur_position(MusicHandle* handle);
/**
* @brief 是否已经播放完
* @param handle Handle
* @return 如果Handle为NULL或未播放完，返回0，反之返回1
*/
FFMPEG_CORE_API int ffmpeg_core_song_is_over(MusicHandle* handle);
/**
* @brief 获取长度（由demuxer回报，可能不准或者不存在）
* @param handle Handle
* @return 如果Handle为NULL，返回-1，反之返回以AV_TIME_BASE为基准的时间（1相当于1/1000000s)
*/
FFMPEG_CORE_API int64_t ffmpeg_core_get_song_length(MusicHandle* handle);
FFMPEG_CORE_API int64_t ffmpeg_core_info_get_song_length(MusicInfoHandle* handle);
/**
* @brief 返回音频文件声道数（SDL可能会改如果音频设备不支持）
* @param handle Handle
* @return 如果Handle为NULL，返回-1，反之返回声道数
*/
FFMPEG_CORE_API int ffmpeg_core_get_channels(MusicHandle* handle);
FFMPEG_CORE_API int ffmpeg_core_info_get_channels(MusicInfoHandle* handle);
/**
* @brief 返回音频文件采样频率（SDL可能会修改）
* @param handle Handle
* @return 如果Handle为NULL，返回-1，反之返回采样频率
*/
FFMPEG_CORE_API int ffmpeg_core_get_freq(MusicHandle* handle);
FFMPEG_CORE_API int ffmpeg_core_info_get_freq(MusicInfoHandle* handle);
/**
* @brief 返回当前状态
* @param handle Handle
* @return 如果Handle为NULL，返回-1，正在播放返回1，未播放返回0
*/
FFMPEG_CORE_API int ffmpeg_core_is_playing(MusicHandle* handle);
/**
* @brief 返回位数
* @param handle Handle
* @return 如果Handle为NULL，返回-1
*/
FFMPEG_CORE_API int ffmpeg_core_get_bits(MusicHandle* handle);
FFMPEG_CORE_API int ffmpeg_core_info_get_bits(MusicInfoHandle* handle);
/**
* @brief 返回比特率
* @param handle Handle
* @return 如果Handle为NULL，返回-1
*/
FFMPEG_CORE_API int64_t ffmpeg_core_get_bitrate(MusicHandle* handle);
FFMPEG_CORE_API int64_t ffmpeg_core_info_get_bitrate(MusicInfoHandle* handle);
/**
* @brief 获取元数据
* @param handle Handle
* @param key 元数据Key
* @return 结果，需要手动调用free释放内存
*/
FFMPEG_CORE_API CORE_CHAR* ffmpeg_core_get_metadata(MusicHandle* handle, const char* key);
FFMPEG_CORE_API CORE_CHAR* ffmpeg_core_info_get_metadata(MusicInfoHandle* handle, const char* key);
FFMPEG_CORE_API int ffmpeg_core_get_fft_data(MusicHandle* handle, float* fft_data, int len);
FFMPEG_CORE_API FfmpegCoreSettings* ffmpeg_core_init_settings();
FFMPEG_CORE_API int ffmpeg_core_settings_set_volume(FfmpegCoreSettings* s, int volume);
FFMPEG_CORE_API int ffmpeg_core_settings_set_speed(FfmpegCoreSettings* s, float speed);
FFMPEG_CORE_API int ffmpeg_core_settings_set_cache_length(FfmpegCoreSettings* s, int length);
FFMPEG_CORE_API int ffmpeg_core_settings_set_max_retry_count(FfmpegCoreSettings* s, int max_retry_count);
FFMPEG_CORE_API int ffmpeg_core_settings_set_url_retry_interval(FfmpegCoreSettings* s, int url_retry_interval);
FFMPEG_CORE_API int ffmpeg_core_settings_set_equalizer_channel(FfmpegCoreSettings* s, int channel, int gain);
FFMPEG_CORE_API int ffmpeg_core_settings_set_use_WASAPI(FfmpegCoreSettings* s, int enable);
FFMPEG_CORE_API int ffmpeg_core_settings_set_enable_exclusive(FfmpegCoreSettings* s, int enable);
FFMPEG_CORE_API int ffmpeg_core_settings_set_max_wait_time(FfmpegCoreSettings* s, int timeout);
FFMPEG_CORE_API int ffmpeg_core_settings_set_wasapi_min_buffer_time(FfmpegCoreSettings* s, int time);
FFMPEG_CORE_API int ffmpeg_core_settings_set_reverb(FfmpegCoreSettings* s, int type, float mix, float time);
FFMPEG_CORE_API int ffmpeg_core_settings_set_max_wait_buffer_time(FfmpegCoreSettings* s, int time);
FFMPEG_CORE_API DeviceNameList* ffmpeg_core_get_audio_devices();
#ifdef __cplusplus
}
#endif
#endif