fix(demo): change const to macro

Signed-off-by: sakumisu <1203593632@qq.com>

Author: sakumisu

demo/audio_v1_mic_multichan_template.c

@@ -55,7 +55,7 @@
 
 /* AudioFreq * DataSize (2 bytes) * NumChannels (Stereo: 1) */
 /* 16bit(2 Bytes) 单声道(Mono:1) */
-#define AUDIO_IN_PACKET ((uint32_t)((AUDIO_MIC_FREQ * 2 * IN_CHANNEL_NUM) / 1000))
+#define AUDIO_IN_PACKET ((uint32_t)((AUDIO_MIC_FREQ * AUDIO_MIC_FRAME_SIZE_BYTE * IN_CHANNEL_NUM) / 1000))
 
 #define USB_CONFIG_SIZE (unsigned long)(9 +                                                    \
                                         AUDIO_AC_DESCRIPTOR_LEN(1) +                           \

demo/audio_v1_mic_speaker_multichan_template.c

@@ -95,9 +95,9 @@
 #define AUDIO_SAMPLE_FREQ(frq) (uint8_t)(frq), (uint8_t)((frq >> 8)), (uint8_t)((frq >> 16))
 
 /* AudioFreq * DataSize (2 bytes) * NumChannels (Stereo: 2) */
-#define AUDIO_OUT_PACKET ((uint32_t)((AUDIO_SPEAKER_FREQ * AUDIO_SPEAKER_FRAME_SIZE_BYTE * 2) / 1000))
+#define AUDIO_OUT_PACKET ((uint32_t)((AUDIO_SPEAKER_FREQ * AUDIO_SPEAKER_FRAME_SIZE_BYTE * OUT_CHANNEL_NUM) / 1000))
 /* 16bit(2 Bytes) 双声道(Mono:2) */
-#define AUDIO_IN_PACKET ((uint32_t)((AUDIO_MIC_FREQ * AUDIO_MIC_FRAME_SIZE_BYTE * 2) / 1000))
+#define AUDIO_IN_PACKET ((uint32_t)((AUDIO_MIC_FREQ * AUDIO_MIC_FRAME_SIZE_BYTE * IN_CHANNEL_NUM) / 1000))
 
 #if USING_FEEDBACK == 0
 #define USB_CONFIG_SIZE (unsigned long)(9 +                                                     \