aggregate.c File Reference

Aggregate video capture driver. More...

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include "debug.h"
#include "lib_common.h"
#include "tv.h"
#include "types.h"
#include "video_capture.h"
#include "video_capture_params.h"
#include "video_frame.h"

Include dependency graph for aggregate.c:

Go to the source code of this file.

Classes
struct	vidcap_aggregate_state

Functions
	REGISTER_MODULE (aggregate, &vidcap_aggregate_info, LIBRARY_CLASS_VIDEO_CAPTURE, VIDEO_CAPTURE_ABI_VERSION)
static void	show_help (void)
static void	vidcap_aggregate_done (void *state)
static struct video_frame *	vidcap_aggregate_grab (void *state, struct audio_frame **audio)
static int	vidcap_aggregate_init (struct vidcap_params *params, void **state)
static void	vidcap_aggregate_probe (struct device_info **cards, int *count, void(**deleter)(void *))

Variables
static const struct video_capture_info	vidcap_aggregate_info

Detailed Description

Aggregate video capture driver.

Author

Martin Pulec pulec.nosp@m.@ces.nosp@m.net.c.nosp@m.z

Definition in file aggregate.c.

Function Documentation

REGISTER_MODULE()

REGISTER_MODULE	(	aggregate	,
		&	vidcap_aggregate_info,
		LIBRARY_CLASS_VIDEO_CAPTURE	,
		VIDEO_CAPTURE_ABI_VERSION	)

show_help()

static void show_help ( void )

static

Definition at line 60 of file aggregate.c.

{
        printf("Aggregate capture\n");
        printf("Usage\n");
        printf("\t-t aggregate -t <dev1_config> -t <dev2_config> ....]\n");
        printf("\t\twhere devn_config is a complete configuration string of device involved in an aggregate device\n");
 
}

Referenced by display_aggregate_init(), and vidcap_aggregate_init().

vidcap_aggregate_done()

static void vidcap_aggregate_done ( void * state )

static

Definition at line 162 of file aggregate.c.

{
        struct vidcap_aggregate_state *s = (struct vidcap_aggregate_state *) state;
 
        assert(s != NULL);
 
        if (s != NULL) {
                int i;
                for (i = 0; i < s->devices_cnt; ++i) {
                         vidcap_done(s->devices[i]);
                }
        }
        
        vf_free(s->frame);
        free(s);
}

References vidcap_aggregate_state::devices, vidcap_aggregate_state::devices_cnt, vidcap_aggregate_state::frame, state, vf_free(), and vidcap_done().

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vidcap_aggregate_grab()

static struct video_frame * vidcap_aggregate_grab ( void * state, struct audio_frame ** audio )

static

Definition at line 180 of file aggregate.c.

{
        struct vidcap_aggregate_state *s = (struct vidcap_aggregate_state *) state;
        struct audio_frame *audio_frame = NULL;
        struct video_frame *frame = NULL;
 
        for (int i = 0; i < s->devices_cnt; ++i) {
                VIDEO_FRAME_DISPOSE(s->captured_frames[i]);
        }
 
        *audio = NULL;
 
        for (int i = 0; i < s->devices_cnt; ++i) {
                frame = NULL;
                while(!frame) {
                        frame = vidcap_grab(s->devices[i], &audio_frame);
                }
                if (i == 0) {
                        s->frame->color_spec = frame->color_spec;
                        s->frame->interlacing = frame->interlacing;
                        s->frame->fps = frame->fps;
                }
                if (s->audio_source_index == -1 && audio_frame != NULL) {
                        fprintf(stderr, "[aggregate] Locking device #%d as an audio source.\n",
                                        i);
                        s->audio_source_index = i;
                }
                if (s->audio_source_index == i) {
                        *audio = audio_frame;
                }
                if (frame->color_spec != s->frame->color_spec ||
                                frame->fps != s->frame->fps ||
                                frame->interlacing != s->frame->interlacing) {
                        fprintf(stderr, "[aggregate] Different format detected: ");
                        if(frame->color_spec != s->frame->color_spec)
                                fprintf(stderr, "codec");
                        if(frame->interlacing != s->frame->interlacing)
                                fprintf(stderr, "interlacing");
                        if(frame->fps != s->frame->fps)
                                fprintf(stderr, "FPS (%.2f and %.2f)", frame->fps, s->frame->fps);
                        fprintf(stderr, "\n");
                        
                        return NULL;
                }
                vf_get_tile(s->frame, i)->width = vf_get_tile(frame, 0)->width;
                vf_get_tile(s->frame, i)->height = vf_get_tile(frame, 0)->height;
                vf_get_tile(s->frame, i)->data_len = vf_get_tile(frame, 0)->data_len;
                vf_get_tile(s->frame, i)->data = vf_get_tile(frame, 0)->data;
                s->captured_frames[i] = frame;
        }
        s->frames++;
        gettimeofday(&s->t, NULL);
        double seconds = tv_diff(s->t, s->t0);    
        if (seconds >= 5) {
            float fps  = s->frames / seconds;
            log_msg(LOG_LEVEL_INFO, "[aggregate cap.] %d frames in %g seconds = %g FPS\n", s->frames, seconds, fps);
            s->t0 = s->t;
            s->frames = 0;
        }  
 
        return s->frame;
}

References audio, vidcap_aggregate_state::audio_source_index, vidcap_aggregate_state::captured_frames, video_frame::color_spec, tile::data, tile::data_len, vidcap_aggregate_state::devices, vidcap_aggregate_state::devices_cnt, video_frame::fps, frame, vidcap_aggregate_state::frame, vidcap_aggregate_state::frames, tile::height, video_frame::interlacing, LOG_LEVEL_INFO, log_msg(), state, vidcap_aggregate_state::t0, tv_diff(), vf_get_tile(), vidcap_grab(), VIDEO_FRAME_DISPOSE, and tile::width.

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vidcap_aggregate_init()

static int vidcap_aggregate_init ( struct vidcap_params * params, void ** state )

static

Definition at line 90 of file aggregate.c.

{
        struct vidcap_aggregate_state *s;
 
        printf("vidcap_aggregate_init\n");
 
 
        s = (struct vidcap_aggregate_state *) calloc(1, sizeof(struct vidcap_aggregate_state));
        if(s == NULL) {
                printf("Unable to allocate aggregate capture state\n");
                return VIDCAP_INIT_FAIL;
        }
 
        s->audio_source_index = -1;
        s->frames = 0;
        gettimeofday(&s->t0, NULL);
 
        if(vidcap_params_get_fmt(params) && strcmp(vidcap_params_get_fmt(params), "") != 0) {
                show_help();
                free(s);
                return VIDCAP_INIT_NOERR;
        }
 
 
        s->devices_cnt = 0;
        struct vidcap_params *tmp = params;
        while((tmp = vidcap_params_get_next(tmp))) {
                if (vidcap_params_get_driver(tmp) != NULL)
                        s->devices_cnt++;
                else
                        break;
        }
 
        s->devices = calloc(s->devices_cnt, sizeof(struct vidcap *));
        tmp = params;
        for (int i = 0; i < s->devices_cnt; ++i) {
                tmp = vidcap_params_get_next(tmp);
 
                if (vidcap_params_get_flags(tmp) == 0 && vidcap_params_get_flags(params) != 0) {
                        vidcap_params_set_flags(tmp, vidcap_params_get_flags(params));
                }
 
                int ret = initialize_video_capture(vidcap_params_get_parent(params), (struct vidcap_params *) tmp, &s->devices[i]);
                if(ret != 0) {
                        fprintf(stderr, "[aggregate] Unable to initialize device %d (%s:%s).\n",
                                        i, vidcap_params_get_driver(tmp),
                                        vidcap_params_get_fmt(tmp));
                        goto error;
                }
        }
 
        s->captured_frames = calloc(s->devices_cnt, sizeof(struct video_frame *));
 
        s->frame = vf_alloc(s->devices_cnt);
        
        *state = s;
        return VIDCAP_INIT_OK;
 
error:
        if(s->devices) {
                int i;
                for (i = 0u; i < s->devices_cnt; ++i) {
                        if(s->devices[i]) {
                                 vidcap_done(s->devices[i]);
                        }
                }
        }
        free(s);
        return VIDCAP_INIT_FAIL;
}

References vidcap_aggregate_state::audio_source_index, vidcap_aggregate_state::captured_frames, vidcap_aggregate_state::devices, vidcap_aggregate_state::devices_cnt, vidcap_aggregate_state::frame, vidcap_aggregate_state::frames, initialize_video_capture(), params, show_help(), state, vidcap_aggregate_state::t0, vf_alloc(), vidcap_done(), VIDCAP_INIT_FAIL, VIDCAP_INIT_NOERR, VIDCAP_INIT_OK, vidcap_params_get_driver(), vidcap_params_get_flags(), vidcap_params_get_fmt(), vidcap_params_get_next(), vidcap_params_get_parent(), and vidcap_params_set_flags().

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vidcap_aggregate_probe()

static void vidcap_aggregate_probe ( struct device_info ** cards, int * count, void(** deleter )(void *) )

static

Definition at line 82 of file aggregate.c.

{
        *cards = NULL;
        *count = 0;
        *deleter = free;
}

References count, and deleter.

Variable Documentation

vidcap_aggregate_info

const struct video_capture_info vidcap_aggregate_info

static

Initial value:

= {
        vidcap_aggregate_probe,
        vidcap_aggregate_init,
        vidcap_aggregate_done,
        vidcap_aggregate_grab,
        VIDCAP_NO_GENERIC_FPS_INDICATOR,
}

Definition at line 243 of file aggregate.c.

                                                               {
        vidcap_aggregate_probe,
        vidcap_aggregate_init,
        vidcap_aggregate_done,
        vidcap_aggregate_grab,
        VIDCAP_NO_GENERIC_FPS_INDICATOR,
};