deinterlace.c

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/*
 * Copyright (c) 2014-2024 CESNET
 * All rights reserved.
 *
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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
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 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <assert.h>           // for assert
#include <stdbool.h>          // for bool, true, false
#include <stdlib.h>
#include <string.h>           // for strcmp, memcpy, strlen
 
#include "capture_filter.h"
#include "debug.h"
#include "lib_common.h"
#include "utils/color_out.h"
#include "video.h"
#include "video_frame.h"
#include "vo_postprocess.h"
struct module;
 
#define MOD_NAME "[deinterlace_blend] "
 
struct state_deinterlace {
        struct video_frame *out; 
        _Bool force;
};
 
static void usage(_Bool for_postprocessor)
{
        color_printf(TBOLD("deinterlace_blend") " deinterlaces output video frames "
                        " by applying linear blend on interleaved odd and even "
                        " fileds.\n\nUsage:\n");
        if (for_postprocessor) {
                color_printf(TBOLD(TRED("\t-p deinterlace")) "[:options] | " TBOLD(TRED("-p deinterlace_blend")) "[:options]\n");
        } else {
                color_printf(TBOLD(TRED("\t--capture-filter deinterlace")) "[:options] -t <capture>\n");
        }
        color_printf("\noptions:\n"
                        "\t" TBOLD("force") " - apply deinterlacing even if input is progressive\n");
}
 
static void * deinterlace_blend_init(const char *config) {
        if (strcmp(config, "help") == 0) {
                usage(1);
                return NULL;
        }
 
        struct state_deinterlace *s = calloc(1, sizeof(struct state_deinterlace));
        assert(s != NULL);
 
        if (strcmp(config, "force") == 0) {
                s->force = 1;
        } else if (strlen(config) > 0) {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Unknown option: %s\n", config);
                free(s);
                return NULL;
        }
 
        return s;
}
 
static void * deinterlace_init(const char *config) {
        if (strcmp(config, "help") == 0) {
                usage(1);
                return NULL;
        }
 
        log_msg(LOG_LEVEL_INFO, MOD_NAME "\"-p deinterlace\" is equivalent to \"-p deinterlace_blend\", you can choose different implementations as well.\n");
 
        return deinterlace_blend_init(config);
}
 
static int cf_deinterlace_init(struct module *parent, const char *cfg, void **state)
{
        UNUSED(parent);
        if (strcmp(cfg, "help") == 0) {
                usage(0);
                return 1;
        }
        void *s = deinterlace_blend_init(cfg);
        if (!s) {
                return 1;
        }
        *state = s;
        return 0;
}
 
static bool deinterlace_get_property(void *state, int property, void *val, size_t *len)
{
        UNUSED(state);
        UNUSED(property);
        UNUSED(val);
        UNUSED(len);
 
        return false;
}
 
static bool
deinterlace_reconfigure(void *state, struct video_desc desc)
{
        struct state_deinterlace *s = (struct state_deinterlace *) state;
 
        vf_free(s->out);
        assert(desc.tile_count == 1);
        s->out = vf_alloc_desc_data(desc);
 
        return true;
}
 
static struct video_frame * deinterlace_getf(void *state)
{
        struct state_deinterlace *s = (struct state_deinterlace *) state;
 
        return s->out;
}
 
static bool deinterlace_postprocess(void *state, struct video_frame *in, struct video_frame *out, int req_pitch)
{
        assert (req_pitch == vc_get_linesize(in->tiles[0].width, in->color_spec));
        assert(video_desc_eq_excl_param(video_desc_from_frame(out),
                                        video_desc_from_frame(in),
                                        PARAM_INTERLACING));
        assert (in->tiles[0].data_len <= vc_get_linesize(in->tiles[0].width, in->color_spec) * in->tiles[0].height);
        assert (out->tiles[0].data_len <= vc_get_linesize(in->tiles[0].width, in->color_spec) * in->tiles[0].height);
 
        struct state_deinterlace *s = state;
        if (in->interlacing != INTERLACED_MERGED && !s->force) {
                memcpy(out->tiles[0].data, in->tiles[0].data, in->tiles[0].data_len);
                return true;
        }
 
        if (!vc_deinterlace_ex(in->color_spec, (unsigned char *) in->tiles[0].data, vc_get_linesize(in->tiles[0].width, in->color_spec),
                                (unsigned char *) out->tiles[0].data, vc_get_linesize(out->tiles[0].width, in->color_spec),
                                in->tiles[0].height)) {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Cannot deinterlace, unsupported pixel format '%s'!\n", get_codec_name(in->color_spec));
                memcpy(out->tiles[0].data, in->tiles[0].data, in->tiles[0].data_len);
        }
 
        return true;
}
 
static struct video_frame *cf_deinterlace_filter(void *state, struct video_frame *f)
{
        UNUSED(state);
 
        struct video_frame *out = vf_alloc_desc_data(video_desc_from_frame(f));
        out->interlacing = PROGRESSIVE;
        out->callbacks.dispose = vf_free;
        if (!deinterlace_postprocess(state, f, out, vc_get_linesize(f->tiles[0].width, f->color_spec))) {
                VIDEO_FRAME_DISPOSE(f);
                vf_free(out);
                return NULL;
        }
        VIDEO_FRAME_DISPOSE(f);
        return out;
}
 
static void deinterlace_done(void *state)
{
        struct state_deinterlace *s = (struct state_deinterlace *) state;
        
        vf_free(s->out);
        free(s);
}
 
static void deinterlace_get_out_desc(void *state, struct video_desc *out, int *in_display_mode, int *out_frames)
{
        struct state_deinterlace *s = (struct state_deinterlace *) state;
 
        *out = video_desc_from_frame(s->out);
 
        UNUSED(in_display_mode);
        //*in_display_mode = DISPLAY_PROPERTY_VIDEO_MERGED;
        *out_frames = 1;
}
 
static const struct vo_postprocess_info vo_pp_deinterlace_blend_info = {
        deinterlace_blend_init,
        deinterlace_reconfigure,
        deinterlace_getf,
        deinterlace_get_out_desc,
        deinterlace_get_property,
        deinterlace_postprocess,
        deinterlace_done,
};
 
static const struct vo_postprocess_info vo_pp_deinterlace_info = {
        deinterlace_init,
        deinterlace_reconfigure,
        deinterlace_getf,
        deinterlace_get_out_desc,
        deinterlace_get_property,
        deinterlace_postprocess,
        deinterlace_done,
};
 
static const struct capture_filter_info capture_filter_deinterlace_info = {
        cf_deinterlace_init,
        deinterlace_done,
        cf_deinterlace_filter
};
 
REGISTER_MODULE(deinterlace_blend, &vo_pp_deinterlace_blend_info, LIBRARY_CLASS_VIDEO_POSTPROCESS, VO_PP_ABI_VERSION);
REGISTER_MODULE(deinterlace, &vo_pp_deinterlace_info, LIBRARY_CLASS_VIDEO_POSTPROCESS, VO_PP_ABI_VERSION);
REGISTER_MODULE(deinterlace, &capture_filter_deinterlace_info, LIBRARY_CLASS_CAPTURE_FILTER, CAPTURE_FILTER_ABI_VERSION);