SND_PCM_FORMAT_U16_LE 无符号16 bit Little Endian SND_PCM_FORMAT_U16_BE 无符号 16 bit Big Endian 比如对于 32-bit 长度的采样数据可以设置为: SND_PCM_FORMAT_S32_LE 有符号32 bit Little Endian SND_PCM_FORMAT_S32_BE 有符号32 bit Big Endian SND_PCM_FORMAT_U32_LE 无符号32 bit Little Endi...
PCM_FORMAT_S32_LE, /** Signed, 8-bit */ PCM_FORMAT_S8, /** Signed, 24-bit (32-bit in memory), little endian */
SND_PCM_FORMAT_S16_BE 有符号16 bit Big Endian SND_PCM_FORMAT_U16_LE 无符号16 bit Little Endian SND_PCM_FORMAT_U16_BE 无符号 16 bit Big Endian 比如对于 32-bit 长度的采样数据可以设置为: SND_PCM_FORMAT_S32_LE 有符号32 bit Little Endian SND_PCM_FORMAT_S32_BE 有符号32 bit Big Endian...
AV_CODEC_ID_PCM_S24LE_PLANAR, AV_CODEC_ID_PCM_S32LE_PLANAR, AV_CODEC_ID_PCM_S16BE_PLANAR, AV_CODEC_ID_PCM_S64LE=0x10800, AV_CODEC_ID_PCM_S64BE, AV_CODEC_ID_PCM_F16LE, AV_CODEC_ID_PCM_F24LE, AV_CODEC_ID_PCM_VIDC, 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. ...
DE s32be PCM signed 32-bit big-endian DE s32le PCM signed 32-bit little-endian DE s8 PCM signed 8-bit DE u16be PCM unsigned 16-bit big-endian DE u16le PCM unsigned 16-bit little-endian DE u24be PCM unsigned 24-bit big-endian ...
#include <stdio.h> #include <stdlib.h> #include <tinyalsa/pcm.h> static size_t read_frames(void **frames) { unsigned int card = 0; unsigned int device = 0; int flags = PCM_IN; const struct pcm_config config = { .channels = 2, .rate = 48000, .format = PCM_FORMAT_S32_LE,...
然后通过AVAudioFormat和音频采样帧数(等于采样率乘以时长)构建AVAudioPCMBuffer,并且通过AVAudioFile.read把音频数据解码到AVAudioPCMBuffer,获取到解码后的PCM Buffer。 AVAudioPCMBuffer包含了多个声道的数据,多个声道的数据是如何存储的那?可以通过AVAudioFormat.isInterleaved进行判断,若是true,则表示多个声道数据是交替...
44 + ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S32_LE), 32); 45 + ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S8), 8); 46 + ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S24_LE), 32); 47 + ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S24_3LE), 24); 48 + ASSERT_EQ(pcm_forma...
二、使用 FFmpeg 命令行实现音频重采样 将采样率 48000 采样格式 s32le 声道数 1 的 PCM 音频数据重...
QString fmt_le; // 小端模式指令 }sample_fmt_entry; sample_fmt_entry sample_fmt_entryes[] = { { AV_SAMPLE_FMT_U8, "u8", "u8" }, { AV_SAMPLE_FMT_S16, "s16be", "s16le" }, { AV_SAMPLE_FMT_S32, "s32be", "s32le" }, ...