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stream.c
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stream.c
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/*
* Capture video from Raspberry Pi Camera and audio from ALSA,
* encode them to H.264/AAC, and mux them to MPEG-TS.
*
* H.264 encoder: Raspberry Pi H.264 hardware encoder (via OpenMAX IL)
* AAC encoder : fdk-aac (via libavcodec)
* MPEG-TS muxer: libavformat
*/
#if defined(__cplusplus)
extern "C" {
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <linux/videodev2.h>
#include <alsa/asoundlib.h>
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include <libavutil/mathematics.h>
#include <getopt.h>
#include "bcm_host.h"
#include "ilclient.h"
#include "hooks.h"
#include "mpegts.h"
#include "httplivestreaming.h"
#include "state.h"
#include "log.h"
#include "text.h"
#include "timestamp.h"
#include "subtitle.h"
#define PROGRAM_NAME "picam"
#define PROGRAM_VERSION "1.4.1"
// Audio-only stream is created if this is 1 (for debugging)
#define AUDIO_ONLY 0
// ALSA buffer size for capture will be multiplied by this number
#define ALSA_BUFFER_MULTIPLY 100
// ALSA buffer size for playback will be multiplied by this number (max: 16)
#define ALSA_PLAYBACK_BUFFER_MULTIPLY 10
// If this is 1, PTS will be reset to zero when it exceeds PTS_MODULO
#define ENABLE_PTS_WRAP_AROUND 0
#if ENABLE_PTS_WRAP_AROUND
// Both PTS and DTS are 33 bit and wraps around to zero
#define PTS_MODULO 8589934592
#endif
// Internal flag indicates that audio is available for read
#define AVAIL_AUDIO 2
// If this value is increased, audio gets faster than video
#define N_BUFFER_COUNT_ACTUAL 1
// If this value is increased, video gets faster than audio
#define AUDIO_BUFFER_CHUNKS 0
// How much PTS difference between audio and video is
// considered to be too large
#define PTS_DIFF_TOO_LARGE 45000 // 90000 == 1 second
// enum
#define EXPOSURE_AUTO 0
#define EXPOSURE_NIGHT 1
// Number of packets to chase recording for each cycle
#define REC_CHASE_PACKETS 10
// Which color (YUV) is used to fill blank borders
#define FILL_COLOR_Y 0
#define FILL_COLOR_U 128
#define FILL_COLOR_V 128
// Whether or not to pass pBuffer from camera to video_encode directly
#define ENABLE_PBUFFER_OPTIMIZATION_HACK 1
#if ENABLE_PBUFFER_OPTIMIZATION_HACK
static OMX_BUFFERHEADERTYPE *video_encode_input_buf = NULL;
static OMX_U8 *video_encode_input_buf_pBuffer_orig = NULL;
#endif
#define ENABLE_AUTO_GOP_SIZE_CONTROL_FOR_VFR 1
// OpenMAX IL ports
static const int CAMERA_PREVIEW_PORT = 70;
static const int CAMERA_CAPTURE_PORT = 71;
static const int CAMERA_INPUT_PORT = 73;
static const int CLOCK_OUTPUT_1_PORT = 80;
static const int VIDEO_RENDER_INPUT_PORT = 90;
static const int VIDEO_ENCODE_INPUT_PORT = 200;
static const int VIDEO_ENCODE_OUTPUT_PORT = 201;
// Directory to put recorded MPEG-TS files
static char *rec_dir = "rec";
static char *rec_tmp_dir = "rec/tmp";
static char *rec_archive_dir = "rec/archive";
// Whether or not to enable clock OMX component
static const int is_clock_enabled = 1;
// Pace of PTS
typedef enum {
PTS_SPEED_NORMAL,
PTS_SPEED_UP,
PTS_SPEED_DOWN,
} pts_mode_t;
typedef struct EncodedPacket {
int64_t pts;
uint8_t *data;
int size;
int stream_index;
int flags;
} EncodedPacket;
static const int log_level_default = LOG_LEVEL_INFO;
static int video_width;
static const int video_width_default = 1280;
static int video_width_32;
static int video_height;
static const int video_height_default = 720;
static int video_height_16;
static float video_fps;
static const float video_fps_default = 30.0f;
static int video_pts_step;
static const int video_pts_step_default = 0;
static int video_gop_size;
static const int video_gop_size_default = 0;
static int video_rotation;
static const int video_rotation_default = 0;
static int video_hflip;
static const int video_hflip_default = 0;
static int video_vflip;
static const int video_vflip_default = 0;
static long video_bitrate;
static const long video_bitrate_default = 2000 * 1000; // 2 Mbps
static char video_avc_profile[21];
static const char *video_avc_profile_default = "constrained_baseline";
typedef struct video_avc_profile_option {
char *name;
OMX_VIDEO_AVCPROFILETYPE profile;
} video_avc_profile_option;
static const video_avc_profile_option video_avc_profile_options[] = {
{ .name = "constrained_baseline", .profile = OMX_VIDEO_AVCProfileConstrainedBaseline },
{ .name = "baseline", .profile = OMX_VIDEO_AVCProfileBaseline },
{ .name = "main", .profile = OMX_VIDEO_AVCProfileMain },
{ .name = "high", .profile = OMX_VIDEO_AVCProfileHigh },
};
static char video_avc_level[4];
static const char *video_avc_level_default = "3.1";
typedef struct video_avc_level_option {
char *name;
OMX_VIDEO_AVCLEVELTYPE level;
} video_avc_level_option;
static const video_avc_level_option video_avc_level_options[] = {
{ .name = "1", .level = OMX_VIDEO_AVCLevel1 },
{ .name = "1b", .level = OMX_VIDEO_AVCLevel1b },
{ .name = "1.1", .level = OMX_VIDEO_AVCLevel11 },
{ .name = "1.2", .level = OMX_VIDEO_AVCLevel12 },
{ .name = "1.3", .level = OMX_VIDEO_AVCLevel13 },
{ .name = "2", .level = OMX_VIDEO_AVCLevel2 },
{ .name = "2.1", .level = OMX_VIDEO_AVCLevel21 },
{ .name = "2.2", .level = OMX_VIDEO_AVCLevel22 },
{ .name = "3", .level = OMX_VIDEO_AVCLevel3 },
{ .name = "3.1", .level = OMX_VIDEO_AVCLevel31 },
{ .name = "3.2", .level = OMX_VIDEO_AVCLevel32 },
{ .name = "4", .level = OMX_VIDEO_AVCLevel4 },
{ .name = "4.1", .level = OMX_VIDEO_AVCLevel41 },
{ .name = "4.2", .level = OMX_VIDEO_AVCLevel42 },
{ .name = "5", .level = OMX_VIDEO_AVCLevel5 },
{ .name = "5.1", .level = OMX_VIDEO_AVCLevel51 },
};
static int video_qp_min;
static const int video_qp_min_default = -1;
static int video_qp_max;
static const int video_qp_max_default = -1;
static int video_qp_initial;
static const int video_qp_initial_default = -1;
static int video_slice_dquant;
static const int video_slice_dquant_default = -1;
static char alsa_dev[256];
static const char *alsa_dev_default = "hw:0,0";
static char audio_preview_dev[256];
static const char *audio_preview_dev_default = "plughw:0,0";
static long audio_bitrate;
static const long audio_bitrate_default = 40000; // 40 Kbps
static int is_audio_channels_specified = 0;
static int audio_channels;
static int audio_preview_channels;
static const int audio_channels_default = 1; // mono
static int audio_sample_rate;
static const int audio_sample_rate_default = 48000;
static int is_hlsout_enabled;
static const int is_hlsout_enabled_default = 0;
static char hls_output_dir[256];
static const char *hls_output_dir_default = "/run/shm/video";
static int is_rtspout_enabled;
static const int is_rtspout_enabled_default = 0;
static char rtsp_video_control_path[256];
static const char *rtsp_video_control_path_default = "/tmp/node_rtsp_rtmp_videoControl";
static char rtsp_audio_control_path[256];
static const char *rtsp_audio_control_path_default = "/tmp/node_rtsp_rtmp_audioControl";
static char rtsp_video_data_path[256];
static const char *rtsp_video_data_path_default = "/tmp/node_rtsp_rtmp_videoData";
static char rtsp_audio_data_path[256];
static const char *rtsp_audio_data_path_default = "/tmp/node_rtsp_rtmp_audioData";
static int is_tcpout_enabled;
static const int is_tcpout_enabled_default = 0;
static char tcp_output_dest[256];
static int is_auto_exposure_enabled;
static const int is_auto_exposure_enabled_default = 0;
static int is_vfr_enabled; // whether variable frame rate is enabled
static const int is_vfr_enabled_default = 0;
static float auto_exposure_threshold;
static const float auto_exposure_threshold_default = 5.0f;
static char white_balance[13];
static const char *white_balance_default = "auto";
typedef struct white_balance_option {
char *name;
OMX_WHITEBALCONTROLTYPE control;
} white_balance_option;
static const white_balance_option white_balance_options[] = {
{ .name = "off", .control = OMX_WhiteBalControlOff },
{ .name = "auto", .control = OMX_WhiteBalControlAuto },
{ .name = "sun", .control = OMX_WhiteBalControlSunLight },
{ .name = "cloudy", .control = OMX_WhiteBalControlCloudy },
{ .name = "shade", .control = OMX_WhiteBalControlShade },
{ .name = "tungsten", .control = OMX_WhiteBalControlTungsten },
{ .name = "fluorescent", .control = OMX_WhiteBalControlFluorescent },
{ .name = "incandescent", .control = OMX_WhiteBalControlIncandescent },
{ .name = "flash", .control = OMX_WhiteBalControlFlash },
{ .name = "horizon", .control = OMX_WhiteBalControlHorizon },
};
// Red gain used when AWB is off
static float awb_red_gain;
static const float awb_red_gain_default = 0.0f;
// Blue gain used when AWB is off
static float awb_blue_gain;
static const float awb_blue_gain_default = 0.0f;
static char exposure_metering[8];
static const char *exposure_metering_default = "average";
typedef struct exposure_metering_option {
char *name;
OMX_METERINGTYPE metering;
} exposure_metering_option;
static const exposure_metering_option exposure_metering_options[] = {
{ .name = "average", .metering = OMX_MeteringModeAverage },
{ .name = "spot", .metering = OMX_MeteringModeSpot },
{ .name = "matrix", .metering = OMX_MeteringModeMatrix },
{ .name = "backlit", .metering = OMX_MeteringModeBacklit },
};
static int manual_exposure_compensation = 0; // EV compensation
static float exposure_compensation;
static int manual_exposure_aperture = 0; // f-number
static float exposure_aperture;
static int manual_exposure_shutter_speed = 0; // in microseconds
static unsigned int exposure_shutter_speed;
static int manual_exposure_sensitivity = 0; // ISO
static unsigned int exposure_sensitivity;
static char state_dir[256];
static const char *state_dir_default = "state";
static char hooks_dir[256];
static const char *hooks_dir_default = "hooks";
static float audio_volume_multiply;
static const float audio_volume_multiply_default = 1.0f;
static int audio_min_value;
static int audio_max_value;
static int is_hls_encryption_enabled;
static const int is_hls_encryption_enabled_default = 0;
static char hls_encryption_key_uri[256];
static const char *hls_encryption_key_uri_default = "stream.key";
static uint8_t hls_encryption_key[16] = {
0x75, 0xb0, 0xa8, 0x1d, 0xe1, 0x74, 0x87, 0xc8,
0x8a, 0x47, 0x50, 0x7a, 0x7e, 0x1f, 0xdf, 0x73,
};
static uint8_t hls_encryption_key_default[16] = {
0x75, 0xb0, 0xa8, 0x1d, 0xe1, 0x74, 0x87, 0xc8,
0x8a, 0x47, 0x50, 0x7a, 0x7e, 0x1f, 0xdf, 0x73,
};
static uint8_t hls_encryption_iv[16] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
};
static uint8_t hls_encryption_iv_default[16] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
};
static int is_preview_enabled;
static const int is_preview_enabled_default = 0;
static int is_previewrect_enabled;
static const int is_previewrect_enabled_default = 0;
static int preview_x;
static int preview_y;
static int preview_width;
static int preview_height;
static int preview_opacity;
static const int preview_opacity_default = 255;
static int record_buffer_keyframes;
static const int record_buffer_keyframes_default = 5;
static int is_timestamp_enabled = 0;
static char timestamp_format[128];
static const char *timestamp_format_default = "%a %b %d %l:%M:%S %p";
static LAYOUT_ALIGN timestamp_layout;
static const LAYOUT_ALIGN timestamp_layout_default = LAYOUT_ALIGN_BOTTOM | LAYOUT_ALIGN_RIGHT;
static int timestamp_horizontal_margin;
static const int timestamp_horizontal_margin_default = 10;
static int timestamp_vertical_margin;
static const int timestamp_vertical_margin_default = 10;
static int timestamp_pos_x;
static int timestamp_pos_y;
static int is_timestamp_abs_pos_enabled = 0;
static TEXT_ALIGN timestamp_text_align;
static const TEXT_ALIGN timestamp_text_align_default = TEXT_ALIGN_LEFT;
static char timestamp_font_name[128];
static const char *timestamp_font_name_default = "FreeMono:style=Bold";
static char timestamp_font_file[1024];
static int timestamp_font_face_index;
static const int timestamp_font_face_index_default = 0;
static float timestamp_font_points;
static const float timestamp_font_points_default = 14.0f;
static int timestamp_font_dpi;
static const int timestamp_font_dpi_default = 96;
static int timestamp_color;
static const int timestamp_color_default = 0xffffff;
static int timestamp_stroke_color;
static const int timestamp_stroke_color_default = 0x000000;
static float timestamp_stroke_width;
static const float timestamp_stroke_width_default = 1.3f;
static int timestamp_letter_spacing;
static const int timestamp_letter_spacing_default = 0;
// how many keyframes should we look back for the next recording
static int recording_look_back_keyframes;
static int64_t video_current_pts = 0;
static int64_t audio_current_pts = 0;
static int64_t last_pts = 0;
static int64_t time_for_last_pts = 0; // Used in VFR mode
pts_mode_t pts_mode = PTS_SPEED_NORMAL;
// Counter for PTS speed up/down
static int speed_up_count = 0;
static int speed_down_count = 0;
static int audio_pts_step_base;
#if AUDIO_BUFFER_CHUNKS > 0
uint16_t *audio_buffer[AUDIO_BUFFER_CHUNKS];
int audio_buffer_index = 0;
int is_audio_buffer_filled = 0;
#endif
// If this value is 1, audio capturing is always disabled.
static int disable_audio_capturing = 0;
static pthread_t audio_nop_thread;
static int fr_q16;
// Function prototypes
static int camera_set_white_balance(char *wb);
static int camera_set_custom_awb_gains();
static void encode_and_send_image();
static void encode_and_send_audio();
void start_record();
void stop_record();
#if ENABLE_AUTO_GOP_SIZE_CONTROL_FOR_VFR
static void set_gop_size(int gop_size);
#endif
static long long video_frame_count = 0;
static long long audio_frame_count = 0;
static int64_t video_start_time;
static int64_t audio_start_time;
static int is_video_recording_started = 0;
static int is_audio_recording_started = 0;
static uint8_t *last_video_buffer = NULL;
static size_t last_video_buffer_size = 0;
static int keyframes_count = 0;
static int video_pending_drop_frames = 0;
static int audio_pending_drop_frames = 0;
static COMPONENT_T *video_encode = NULL;
static COMPONENT_T *component_list[5];
static int n_component_list = 0;
static ILCLIENT_T *ilclient;
static ILCLIENT_T *cam_client;
static COMPONENT_T *camera_component = NULL;
static COMPONENT_T *render_component = NULL;
static COMPONENT_T *clock_component = NULL;
static TUNNEL_T tunnel[3]; // Must be null-terminated
static int n_tunnel = 0;
static AVFormatContext *tcp_ctx;
static pthread_mutex_t tcp_mutex = PTHREAD_MUTEX_INITIALIZER;
static int current_exposure_mode = EXPOSURE_AUTO;
static int keepRunning = 1;
static int frame_count = 0;
static int current_audio_frames = 0;
static uint8_t *codec_configs[2];
static int codec_config_sizes[2];
static int codec_config_total_size = 0;
static int n_codec_configs = 0;
static struct timespec tsBegin = { .tv_sec = 0, .tv_nsec = 0 };
static AVFormatContext *rec_format_ctx;
static int flush_recording_seconds = 5; // Flush recording data every 5 seconds
static time_t rec_start_time;
static HTTPLiveStreaming *hls;
// NAL unit type 9
static uint8_t access_unit_delimiter[] = {
0x00, 0x00, 0x00, 0x01, 0x09, 0xf0,
};
static int access_unit_delimiter_length = 6;
// sound
static snd_pcm_t *capture_handle;
static snd_pcm_t *audio_preview_handle;
static snd_pcm_hw_params_t *alsa_hw_params;
static uint16_t *samples;
static AVFrame *av_frame;
static int audio_fd_count;
static struct pollfd *poll_fds; // file descriptors for polling audio
static int is_first_audio;
static int period_size;
static int audio_buffer_size;
static int is_audio_preview_enabled;
static const int is_audio_preview_enabled_default = 0;
static int is_audio_preview_device_opened = 0;
// threads
static pthread_mutex_t mutex_writing = PTHREAD_MUTEX_INITIALIZER;
// UNIX domain sockets
static int sockfd_video;
static int sockfd_video_control;
static int sockfd_audio;
static int sockfd_audio_control;
static uint8_t *encbuf = NULL;
static int encbuf_size = -1;
static pthread_t rec_thread;
static pthread_cond_t rec_cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t rec_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t rec_write_mutex = PTHREAD_MUTEX_INITIALIZER;
static int rec_thread_needs_write = 0;
static int rec_thread_needs_exit = 0;
static int rec_thread_frame = 0;
static int rec_thread_needs_flush = 0;
EncodedPacket **encoded_packets; // circular buffer
static int current_encoded_packet = -1;
static int *keyframe_pointers;
static int current_keyframe_pointer = -1;
static int is_keyframe_pointers_filled = 0;
static int encoded_packets_size;
// hooks
static pthread_t hooks_thread;
char recording_filepath[256];
char recording_tmp_filepath[256];
char recording_archive_filepath[1024];
char recording_basename[256];
char recording_dest_dir[1024];
int is_recording = 0;
static MpegTSCodecSettings codec_settings;
static int is_audio_muted = 0;
// Will be set to 1 when the camera finishes capturing
static int is_camera_finished = 0;
#if ENABLE_AUTO_GOP_SIZE_CONTROL_FOR_VFR
// Variables for variable frame rate
static int64_t last_keyframe_pts = 0;
static int frames_since_last_keyframe = 0;
#endif
static float min_fps = -1.0f;
static float max_fps = -1.0f;
// Query camera capabilities and exit
static int query_and_exit = 0;
static pthread_mutex_t camera_finish_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t camera_finish_cond = PTHREAD_COND_INITIALIZER;
static char errbuf[1024];
static void unmute_audio() {
log_info("unmute");
is_audio_muted = 0;
}
static void mute_audio() {
log_info("mute");
is_audio_muted = 1;
}
// Check if disk usage is >= 95%
static int is_disk_almost_full() {
struct statvfs stat;
statvfs("/", &stat);
int used_percent = ceil( (stat.f_blocks - stat.f_bfree) * 100.0f / stat.f_blocks);
log_info("disk_usage=%d%% ", used_percent);
if (used_percent >= 95) {
return 1;
} else {
return 0;
}
}
static void mark_keyframe_packet() {
current_keyframe_pointer++;
if (current_keyframe_pointer >= record_buffer_keyframes) {
current_keyframe_pointer = 0;
if (!is_keyframe_pointers_filled) {
is_keyframe_pointers_filled = 1;
}
}
keyframe_pointers[current_keyframe_pointer] = current_encoded_packet;
}
static void prepare_encoded_packets() {
int audio_fps = audio_sample_rate / 1 / period_size;
encoded_packets_size = (video_fps + 1) * record_buffer_keyframes * 2 +
(audio_fps + 1) * record_buffer_keyframes * 2 + 100;
int malloc_size = sizeof(EncodedPacket *) * encoded_packets_size;
encoded_packets = malloc(malloc_size);
if (encoded_packets == NULL) {
log_error("error: cannot allocate memory for encoded_packets\n");
exit(EXIT_FAILURE);
}
memset(encoded_packets, 0, malloc_size);
}
static int write_encoded_packets(int max_packets, int origin_pts) {
int ret;
AVPacket avpkt;
EncodedPacket *enc_pkt;
av_init_packet(&avpkt);
int wrote_packets = 0;
pthread_mutex_lock(&rec_write_mutex);
while (1) {
wrote_packets++;
enc_pkt = encoded_packets[rec_thread_frame];
avpkt.pts = avpkt.dts = enc_pkt->pts - origin_pts;
avpkt.data = enc_pkt->data;
avpkt.size = enc_pkt->size;
avpkt.stream_index = enc_pkt->stream_index;
avpkt.flags = enc_pkt->flags;
ret = av_write_frame(rec_format_ctx, &avpkt);
if (ret < 0) {
av_strerror(ret, errbuf, sizeof(errbuf));
log_error("error: write_encoded_packets: av_write_frame: %s\n", errbuf);
}
if (++rec_thread_frame == encoded_packets_size) {
rec_thread_frame = 0;
}
if (rec_thread_frame == current_encoded_packet) {
break;
}
if (wrote_packets == max_packets) {
break;
}
}
pthread_mutex_unlock(&rec_write_mutex);
av_free_packet(&avpkt);
return wrote_packets;
}
static void add_encoded_packet(int64_t pts, uint8_t *data, int size, int stream_index, int flags) {
EncodedPacket *packet;
if (++current_encoded_packet == encoded_packets_size) {
current_encoded_packet = 0;
}
packet = encoded_packets[current_encoded_packet];
if (packet != NULL) {
int next_keyframe_pointer = current_keyframe_pointer + 1;
if (next_keyframe_pointer >= record_buffer_keyframes) {
next_keyframe_pointer = 0;
}
if (current_encoded_packet == keyframe_pointers[next_keyframe_pointer]) {
log_warn("warning: Record buffer is starving. Recorded file may not start from keyframe. Try reducing the value of --gopsize.\n");
}
av_freep(&packet->data);
} else {
packet = malloc(sizeof(EncodedPacket));
if (packet == NULL) {
perror("malloc for EncodedPacket");
return;
}
encoded_packets[current_encoded_packet] = packet;
}
packet->pts = pts;
packet->data = data;
packet->size = size;
packet->stream_index = stream_index;
packet->flags = flags;
}
static void free_encoded_packets() {
int i;
EncodedPacket *packet;
for (i = 0; i < encoded_packets_size; i++) {
packet = encoded_packets[i];
if (packet != NULL) {
av_freep(&packet->data);
free(packet);
}
}
}
void setup_av_frame(AVFormatContext *format_ctx) {
AVCodecContext *audio_codec_ctx;
int ret;
int buffer_size;
#if AUDIO_ONLY
audio_codec_ctx = format_ctx->streams[0]->codec;
#else
audio_codec_ctx = format_ctx->streams[1]->codec;
#endif
av_frame = av_frame_alloc();
if (!av_frame) {
log_error("error: av_frame_alloc failed\n");
exit(EXIT_FAILURE);
}
av_frame->sample_rate = audio_codec_ctx->sample_rate;
log_debug("sample_rate: %d\n", audio_codec_ctx->sample_rate);
av_frame->nb_samples = audio_codec_ctx->frame_size;
log_debug("nb_samples: %d\n", audio_codec_ctx->frame_size);
av_frame->format = audio_codec_ctx->sample_fmt;
log_debug("sample_fmt: %d\n", audio_codec_ctx->sample_fmt);
av_frame->channel_layout = audio_codec_ctx->channel_layout;
log_debug("audio_codec_ctx->channel_layout: %" PRIu64 "\n", audio_codec_ctx->channel_layout);
log_debug("av_frame->channel_layout: %" PRIu64 "\n", av_frame->channel_layout);
log_debug("audio_codec_ctx->channels: %d\n", audio_codec_ctx->channels);
log_debug("av_frame->channels: %d\n", av_frame->channels);
buffer_size = av_samples_get_buffer_size(NULL, audio_codec_ctx->channels,
audio_codec_ctx->frame_size, audio_codec_ctx->sample_fmt, 0);
samples = av_malloc(buffer_size);
if (!samples) {
log_error("error: av_malloc for samples failed\n");
exit(EXIT_FAILURE);
}
log_debug("allocated %d bytes for audio samples\n", buffer_size);
#if AUDIO_BUFFER_CHUNKS > 0
int i;
for (i = 0; i < AUDIO_BUFFER_CHUNKS; i++) {
audio_buffer[i] = av_malloc(buffer_size);
if (!audio_buffer[i]) {
log_error("error: av_malloc for audio_buffer[%d] failed\n", i);
exit(EXIT_FAILURE);
}
}
#endif
period_size = buffer_size / audio_channels / sizeof(short);
audio_pts_step_base = 90000.0f * period_size / audio_sample_rate;
log_debug("audio_pts_step_base: %d\n", audio_pts_step_base);
ret = avcodec_fill_audio_frame(av_frame, audio_codec_ctx->channels, audio_codec_ctx->sample_fmt,
(const uint8_t*)samples, buffer_size, 0);
if (ret < 0) {
av_strerror(ret, errbuf, sizeof(errbuf));
log_error("error: avcodec_fill_audio_frame failed: %s\n", errbuf);
exit(EXIT_FAILURE);
}
}
// Create dir if it does not exist
int create_dir(const char *dir) {
struct stat st;
int err;
err = stat(dir, &st);
if (err == -1) {
if (errno == ENOENT) {
// create directory
if (mkdir(dir, 0755) == 0) { // success
log_info("created directory: ./%s\n", dir);
} else { // error
log_error("error creating directory ./%s: %s\n",
dir, strerror(errno));
return -1;
}
} else {
perror("stat directory");
return -1;
}
} else {
if (!S_ISDIR(st.st_mode)) {
log_error("error: ./%s is not a directory\n", dir);
return -1;
}
}
if (access(dir, R_OK) != 0) {
log_error("error: cannot access directory ./%s: %s\n",
dir, strerror(errno));
return -1;
}
return 0;
}
void *rec_thread_stop(int skip_cleanup) {
FILE *fsrc, *fdest;
int read_len;
uint8_t *copy_buf;
log_info("stop rec\n");
if (!skip_cleanup) {
copy_buf = malloc(BUFSIZ);
if (copy_buf == NULL) {
perror("malloc for copy_buf");
pthread_exit(0);
}
pthread_mutex_lock(&rec_write_mutex);
mpegts_close_stream(rec_format_ctx);
mpegts_destroy_context(rec_format_ctx);
pthread_mutex_unlock(&rec_write_mutex);
log_debug("copy ");
fsrc = fopen(recording_tmp_filepath, "r");
if (fsrc == NULL) {
log_error("error: failed to open %s: %s\n",
recording_tmp_filepath, strerror(errno));
}
fdest = fopen(recording_archive_filepath, "a");
if (fdest == NULL) {
log_error("error: failed to open %s: %s\n",
recording_archive_filepath, strerror(errno));
fclose(fsrc);
}
while (1) {
read_len = fread(copy_buf, 1, BUFSIZ, fsrc);
if (read_len > 0) {
fwrite(copy_buf, 1, read_len, fdest);
}
if (read_len != BUFSIZ) {
break;
}
}
if (feof(fsrc)) {
fclose(fsrc);
fclose(fdest);
} else {
log_error("error: rec_thread_stop: not an EOF?: %s\n", strerror(errno));
}
// Create a symlink
char symlink_dest_path[1024];
size_t rec_dir_len = strlen(rec_dir);
struct stat file_stat;
// If recording_archive_filepath starts with "rec/", then remove it
if (strncmp(recording_archive_filepath, rec_dir, rec_dir_len) == 0 &&
recording_archive_filepath[rec_dir_len] == '/') {
snprintf(symlink_dest_path, sizeof(symlink_dest_path),
recording_archive_filepath + rec_dir_len + 1);
} else if (recording_archive_filepath[0] == '/') { // absolute path
snprintf(symlink_dest_path, sizeof(symlink_dest_path),
recording_archive_filepath);
} else { // relative path
char cwd[1024];
if (getcwd(cwd, sizeof(cwd)) == NULL) {
log_error("error: failed to get current working directory: %s\n",
strerror(errno));
cwd[0] = '.';
cwd[1] = '.';
cwd[2] = '\0';
}
snprintf(symlink_dest_path, sizeof(symlink_dest_path),
"%s/%s", cwd, recording_archive_filepath);
}
log_debug("symlink(%s, %s)\n", symlink_dest_path, recording_filepath);
if (lstat(recording_filepath, &file_stat) == 0) { // file (symlink) exists
log_info("replacing existing symlink: %s\n", recording_filepath);
unlink(recording_filepath);
}
if (symlink(symlink_dest_path, recording_filepath) != 0) {
log_error("error: cannot create symlink from %s to %s: %s\n",
symlink_dest_path, recording_filepath, strerror(errno));
}
// unlink tmp file
log_debug("unlink");
unlink(recording_tmp_filepath);
state_set(state_dir, "last_rec", recording_filepath);
free(copy_buf);
}
is_recording = 0;
state_set(state_dir, "record", "false");
pthread_exit(0);
}
void flush_record() {
rec_thread_needs_flush = 1;
}
void stop_record() {
rec_thread_needs_exit = 1;
}
void check_record_duration() {
time_t now;
if (is_recording) {
now = time(NULL);
if (now - rec_start_time > flush_recording_seconds) {
flush_record();
}
}
}
void *rec_thread_start() {
time_t rawtime;
struct tm *timeinfo;
AVPacket av_pkt;
int wrote_packets;
int is_caught_up = 0;
int unique_number = 1;
int64_t rec_start_pts, rec_end_pts;
char state_buf[256];
EncodedPacket *enc_pkt;
int filename_decided = 0;
uint8_t *copy_buf;
FILE *fsrc, *fdest;
int read_len;
char *dest_dir;
int has_error;
has_error = 0;
copy_buf = malloc(BUFSIZ);
if (copy_buf == NULL) {
perror("malloc for copy_buf");
pthread_exit(0);
}
time(&rawtime);
timeinfo = localtime(&rawtime);
rec_start_time = time(NULL);
rec_start_pts = -1;
if (recording_dest_dir[0] != 0) {
dest_dir = recording_dest_dir;
} else {
dest_dir = rec_archive_dir;
}
if (recording_basename[0] != 0) { // basename is already decided
snprintf(recording_filepath, sizeof(recording_filepath),
"%s/%s", rec_dir, recording_basename);
snprintf(recording_archive_filepath, sizeof(recording_archive_filepath),
"%s/%s", dest_dir, recording_basename);
snprintf(recording_tmp_filepath, sizeof(recording_tmp_filepath),
"%s/%s", rec_tmp_dir, recording_basename);
filename_decided = 1;
} else {
strftime(recording_basename, sizeof(recording_basename), "%Y-%m-%d_%H-%M-%S", timeinfo);
snprintf(recording_filepath, sizeof(recording_filepath),
"%s/%s.ts", rec_dir, recording_basename);
if (access(recording_filepath, F_OK) != 0) { // filename is decided
sprintf(recording_basename + strlen(recording_basename), ".ts"); // add ".ts"
snprintf(recording_archive_filepath, sizeof(recording_archive_filepath),
"%s/%s", dest_dir, recording_basename);
snprintf(recording_tmp_filepath, sizeof(recording_tmp_filepath),
"%s/%s", rec_tmp_dir, recording_basename);
filename_decided = 1;
}
while (!filename_decided) {
unique_number++;
snprintf(recording_filepath, sizeof(recording_filepath),
"%s/%s-%d.ts", rec_dir, recording_basename, unique_number);
if (access(recording_filepath, F_OK) != 0) { // filename is decided
sprintf(recording_basename + strlen(recording_basename), "-%d.ts", unique_number);
snprintf(recording_archive_filepath, sizeof(recording_archive_filepath),
"%s/%s", dest_dir, recording_basename);
snprintf(recording_tmp_filepath, sizeof(recording_tmp_filepath),
"%s/%s", rec_tmp_dir, recording_basename);
filename_decided = 1;
}
}
}
// Remove existing file
if (unlink(recording_archive_filepath) == 0) {
log_info("removed existing file: %s\n", recording_archive_filepath);
}
pthread_mutex_lock(&rec_write_mutex);
rec_format_ctx = mpegts_create_context(&codec_settings);
mpegts_open_stream(rec_format_ctx, recording_tmp_filepath, 0);
is_recording = 1;
log_info("start rec to %s\n", recording_archive_filepath);
state_set(state_dir, "record", "true");
pthread_mutex_unlock(&rec_write_mutex);
int look_back_keyframes;
if (recording_look_back_keyframes != -1) {
look_back_keyframes = recording_look_back_keyframes;
} else {
look_back_keyframes = record_buffer_keyframes;
}
int start_keyframe_pointer;
if (!is_keyframe_pointers_filled) { // first cycle has not been finished
if (look_back_keyframes - 1 > current_keyframe_pointer) { // not enough pre-start buffer
start_keyframe_pointer = 0;
} else {
start_keyframe_pointer = current_keyframe_pointer - look_back_keyframes + 1;
}
} else { // at least one cycle has been passed
start_keyframe_pointer = current_keyframe_pointer - look_back_keyframes + 1;
}
// turn negative into positive
while (start_keyframe_pointer < 0) {
start_keyframe_pointer += record_buffer_keyframes;
}
rec_thread_frame = keyframe_pointers[start_keyframe_pointer];
enc_pkt = encoded_packets[rec_thread_frame];
rec_start_pts = enc_pkt->pts;
write_encoded_packets(REC_CHASE_PACKETS, rec_start_pts);
av_init_packet(&av_pkt);
while (!rec_thread_needs_exit) {
pthread_mutex_lock(&rec_mutex);
while (!rec_thread_needs_write) {
pthread_cond_wait(&rec_cond, &rec_mutex);
}
pthread_mutex_unlock(&rec_mutex);
if (rec_thread_frame != current_encoded_packet) {
wrote_packets = write_encoded_packets(REC_CHASE_PACKETS, rec_start_pts);
if (wrote_packets <= 2) {
if (!is_caught_up) {
log_debug("caught up");
is_caught_up = 1;
}
}