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add 0x80 and 0x8c as possible first bytes of AAC-ELD frames

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This commit is contained in:
fduncanh
2022-01-02 03:24:20 -05:00
parent 76b202c38d
commit 0c4f02b61a
2 changed files with 21 additions and 7 deletions
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26
renderers/audio_renderer_gstreamer.c
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@@ -177,18 +177,32 @@ void audio_renderer_render_buffer(raop_ntp_t *ntp, unsigned char* data, int data
bool valid;
if (data_len == 0 || renderer == NULL) return;
/* all audio received seems to be either ct = 8 (AAC_ELD 44100/2 spf 460 ) AirPlay Mirror protocol */
/* or ct = 2 (ALAC 44100/16/2 spf 352) AirPlay protocol */
/* first byte data[0] of ALAC frame is 0x20, first byte of AAC_ELD is 0x8d or 0x8e, AAC_LC is 0xff (ADTS) */
/* all audio received seems to be either ct = 8 (AAC_ELD 44100/2 spf 460 ) AirPlay Mirror protocol *
* or ct = 2 (ALAC 44100/16/2 spf 352) AirPlay protocol. *
* first byte data[0] of ALAC frame is 0x20, *
* first byte of AAC_ELD is 0x8c, 0x8d or 0x8e: 0x100011(00,01,10) in modern devices *
* but is 0x80, 0x81 or 0x82: 0x100000(00,01,10) in ios9, ios10 devices *
* first byte of AAC_LC should be 0xff (ADTS) (but has never been seen). */
buffer = gst_buffer_new_and_alloc(data_len);
assert(buffer != NULL);
GST_BUFFER_DTS(buffer) = (GstClockTime)pts;
gst_buffer_fill(buffer, 0, data, data_len);
switch (renderer->ct) {
switch (renderer->ct){
case 8: /*AAC-ELD*/
valid = (data[0] == 0x8d || data[0] == 0x8e);
valid = valid || (data[0] == 0x81 || data[0] == 0x82); /* from iOS 9, iOS 10 clients (because 32 bit devices?) */
switch (data[0]){
case 0x8c:
case 0x8d:
case 0x8e:
case 0x80:
case 0x81:
case 0x82:
valid = true;
break;
default:
valid = false;
break;
}
break;
case 2: /*ALAC*/
valid = (data[0] == 0x20);