huxi
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
#ifdef SUPPORT_MS_EXTENSIONS
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#pragma bss_seg(".low_latency.data.bss")
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#pragma data_seg(".low_latency.data")
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#pragma const_seg(".low_latency.text.const")
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#pragma code_seg(".low_latency.text")
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#endif
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#include "system/includes.h"
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#include "btstack/a2dp_media_codec.h"
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#include "a2dp_player.h"
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#include "app_tone.h"
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#include "low_latency.h"
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#include "app_config.h"
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#if TCFG_APP_BT_EN
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#if(TCFG_USER_TWS_ENABLE == 0)
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enum {
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API_ENTER_LOW_LATENCY,
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API_EXIT_LOW_LATENCY,
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API_RESTART_A2DP_DEC,
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};
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static u8 low_latency_mode = 0;
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static u16 low_latency_timer = 0;
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static u8 g_btaddr[6];
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static void *g_a2dp_file = NULL;
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static void get_a2dp_packet_timer(void *p)
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{
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struct a2dp_media_frame frame;
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if (!g_a2dp_file) {
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return;
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}
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int len = a2dp_media_try_get_packet(g_a2dp_file, &frame);
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if (len == 0) {
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return;
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}
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u16 seqn = (frame.packet[2] << 8) | frame.packet[3];
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int type = a2dp_media_get_codec_type(g_a2dp_file);
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if (type == A2DP_CODEC_SBC) {
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seqn += 200 / 15;
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} else {
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seqn += 200 / 20;
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}
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a2dp_media_clear_packet_before_seqn(g_a2dp_file, seqn);
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if (!tone_player_runing()) {
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sys_timer_del(low_latency_timer);
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low_latency_timer = 0;
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a2dp_player_open(g_btaddr);
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}
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}
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static void set_low_latency_mode(int enable)
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{
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if (low_latency_timer) {
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return;
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}
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printf("set_low_latency: enable = %d\n", enable);
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a2dp_player_low_latency_enable(enable);
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if (a2dp_player_runing()) {
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a2dp_player_get_btaddr(g_btaddr);
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a2dp_player_close(g_btaddr);
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g_a2dp_file = a2dp_open_media_file(g_btaddr);
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low_latency_timer = sys_timer_add(NULL, get_a2dp_packet_timer, 100);
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}
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if (enable) {
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play_tone_file(get_tone_files()->low_latency_in);
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} else {
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play_tone_file(get_tone_files()->low_latency_out);
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}
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low_latency_mode = enable;
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}
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void bt_set_low_latency_mode(int enable)
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{
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set_low_latency_mode(enable);
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}
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int bt_get_low_latency_mode()
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{
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return low_latency_mode;
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}
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#endif
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#endif /* #if TCFG_APP_BT_EN */
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