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FS-7677 handle packet loss

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Seven Du 2015-07-23 17:15:13 +08:00
parent 5e9a4992e6
commit f55ac43672
1 changed files with 30 additions and 1 deletions
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31
src/mod/applications/mod_av/avcodec.c
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@ -182,6 +182,7 @@ typedef struct h264_codec_context_s {
AVPacket encoder_avpacket;
our_h264_nalu_t nalus[MAX_NALUS];
enum AVCodecID av_codec_id;
uint16_t last_seq; // last received frame->seq
} h264_codec_context_t;
static uint8_t ff_input_buffer_padding[FF_INPUT_BUFFER_PADDING_SIZE] = { 0 };
@ -298,6 +299,7 @@ static switch_status_t buffer_h263_packets(h264_codec_context_t *context, switch
uint8_t *data = frame->data;
int header_len = 4; // Mode A, default
h263_payload_header_t *h = (h263_payload_header_t *)data;
int delta = 0;
if (h->f) {
if (h->p) {
@ -309,11 +311,38 @@ static switch_status_t buffer_h263_packets(h264_codec_context_t *context, switch
}
#if 0
if (h->i == 0) {
//emulate packet loss
static int z = 0;
if ((z++ % 200 == 0) && h->i) return SWITCH_STATUS_RESTART;
#endif
#if 0
if (h->i == 0 && frame->m) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Got a H263 Key Frame\n");
}
#endif
delta = frame->seq - context->last_seq;
if (delta > 1) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "packet loss? frame seq: %d last seq: %d, delta = %d\n", frame->seq, context->last_seq, delta);
if (delta > 2) { // wait for key frame
if (h->i) {
switch_set_flag(frame, SFF_WAIT_KEY_FRAME);
return SWITCH_STATUS_RESTART;
} else { // key frame
context->last_seq = frame->seq;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Received a H263 key frame after delta %d\n", delta);
}
}
// return SWITCH_STATUS_RESTART;
} else if (delta < 1) {
// probabaly stream changed
return SWITCH_STATUS_RESTART;
} else { // delta == 1
context->last_seq = frame->seq;
}
if (0) {
static char *h263_src[] = {
"NONE",