jordan/camera-streamer
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Discover H264 keyframes on dequeue

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This commit is contained in:
Kamil Trzciński
2022-10-29 11:36:58 +02:00
parent ec2ed5e392
commit 79e9bca11f
6 changed files with 27 additions and 26 deletions
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23
device/buffer_queue.c
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@ -2,6 +2,7 @@
#include "device/buffer_list.h"
#include "device/device.h"
#include "util/opts/log.h"
#include "util/opts/fourcc.h"
#include <pthread.h>
#include <inttypes.h>
@ -144,6 +145,24 @@ int buffer_list_enqueue(buffer_list_t *buf_list, buffer_t *dma_buf)
return 1;
}
static void buffer_update_h264_key_frame(buffer_t *buf)
{
unsigned char *data = buf->start;
static const int N = 8;
char buffer [3*N+1];
buffer[sizeof(buffer)-1] = 0;
for(int j = 0; j < N; j++)
sprintf(&buffer[sizeof(buffer)/N*j], "%02X ", data[j]);
if (buf->flags.is_keyframe) {
LOG_DEBUG(buf, "Got key frame (from V4L2)!: %s", buffer);
} else if (buf->used >= 5 && (data[4] & 0x1F) == 0x07) {
LOG_DEBUG(buf, "Got key frame (from buffer)!: %s", buffer);
buf->flags.is_keyframe = true;
}
}
buffer_t *buffer_list_dequeue(buffer_list_t *buf_list)
{
buffer_t *buf = NULL;
@ -174,6 +193,10 @@ buffer_t *buffer_list_dequeue(buffer_list_t *buf_list)
buf->dma_source = NULL;
}
if (buf_list->fmt.format == V4L2_PIX_FMT_H264) {
buffer_update_h264_key_frame(buf);
}
buf_list->frames++;
return buf;