bitstream_filters.c

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/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
#include <stdint.h>
#include <string.h>
 
#include "libavutil/log.h"
 
#include "bsf.h"
#include "bsf_internal.h"
 
extern const FFBitStreamFilter ff_aac_adtstoasc_bsf;
extern const FFBitStreamFilter ff_ahx_to_mp2_bsf;
extern const FFBitStreamFilter ff_apv_metadata_bsf;
extern const FFBitStreamFilter ff_av1_frame_merge_bsf;
extern const FFBitStreamFilter ff_av1_frame_split_bsf;
extern const FFBitStreamFilter ff_av1_metadata_bsf;
extern const FFBitStreamFilter ff_chomp_bsf;
extern const FFBitStreamFilter ff_dump_extradata_bsf;
extern const FFBitStreamFilter ff_dca_core_bsf;
extern const FFBitStreamFilter ff_dovi_rpu_bsf;
extern const FFBitStreamFilter ff_dovi_split_bsf;
extern const FFBitStreamFilter ff_dts2pts_bsf;
extern const FFBitStreamFilter ff_dv_error_marker_bsf;
extern const FFBitStreamFilter ff_eac3_core_bsf;
extern const FFBitStreamFilter ff_eia608_to_smpte436m_bsf;
extern const FFBitStreamFilter ff_evc_frame_merge_bsf;
extern const FFBitStreamFilter ff_extract_extradata_bsf;
extern const FFBitStreamFilter ff_filter_units_bsf;
extern const FFBitStreamFilter ff_h264_metadata_bsf;
extern const FFBitStreamFilter ff_h264_mp4toannexb_bsf;
extern const FFBitStreamFilter ff_h264_redundant_pps_bsf;
extern const FFBitStreamFilter ff_hapqa_extract_bsf;
extern const FFBitStreamFilter ff_hevc_metadata_bsf;
extern const FFBitStreamFilter ff_hevc_mp4toannexb_bsf;
extern const FFBitStreamFilter ff_imx_dump_header_bsf;
extern const FFBitStreamFilter ff_lcevc_merge_bsf;
extern const FFBitStreamFilter ff_lcevc_metadata_bsf;
extern const FFBitStreamFilter ff_media100_to_mjpegb_bsf;
extern const FFBitStreamFilter ff_mjpeg2jpeg_bsf;
extern const FFBitStreamFilter ff_mjpega_dump_header_bsf;
extern const FFBitStreamFilter ff_mpeg2_metadata_bsf;
extern const FFBitStreamFilter ff_mpeg4_unpack_bframes_bsf;
extern const FFBitStreamFilter ff_mov2textsub_bsf;
extern const FFBitStreamFilter ff_noise_bsf;
extern const FFBitStreamFilter ff_null_bsf;
extern const FFBitStreamFilter ff_opus_metadata_bsf;
extern const FFBitStreamFilter ff_pcm_rechunk_bsf;
extern const FFBitStreamFilter ff_pgs_frame_merge_bsf;
extern const FFBitStreamFilter ff_prores_metadata_bsf;
extern const FFBitStreamFilter ff_remove_extradata_bsf;
extern const FFBitStreamFilter ff_setts_bsf;
extern const FFBitStreamFilter ff_showinfo_bsf;
extern const FFBitStreamFilter ff_smpte436m_to_eia608_bsf;
extern const FFBitStreamFilter ff_text2movsub_bsf;
extern const FFBitStreamFilter ff_trace_headers_bsf;
extern const FFBitStreamFilter ff_trim_bsf;
extern const FFBitStreamFilter ff_truehd_core_bsf;
extern const FFBitStreamFilter ff_vp9_metadata_bsf;
extern const FFBitStreamFilter ff_vp9_raw_reorder_bsf;
extern const FFBitStreamFilter ff_vp9_superframe_bsf;
extern const FFBitStreamFilter ff_vp9_superframe_split_bsf;
extern const FFBitStreamFilter ff_vvc_metadata_bsf;
extern const FFBitStreamFilter ff_vvc_mp4toannexb_bsf;
 
/* these filters are part of public or internal API,
 * they are formatted to not be found by the grep
 * as they are manually added */
extern  const FFBitStreamFilter ff_source_bsf;
extern  const FFBitStreamFilter ff_sink_bsf;
 
#include "libavcodec/bsf_list.c"
 
const AVBitStreamFilter *av_bsf_iterate(void **opaque)
{
    uintptr_t i = (uintptr_t) * opaque;
    const FFBitStreamFilter *f = bitstream_filters[i];
 
    if (f) {
        *opaque = (void *)(i + 1);
        return &f->p;
    }
    return NULL;
}
 
const AVBitStreamFilter *av_bsf_get_by_name(const char *name)
{
    const AVBitStreamFilter *f = NULL;
    void *i = 0;
 
    if (!name)
        return NULL;
 
    while ((f = av_bsf_iterate(&i))) {
        if (!strcmp(f->name, name))
            return f;
    }
 
    return NULL;
}
 
const AVClass *ff_bsf_child_class_iterate(void **opaque)
{
    const AVBitStreamFilter *f;
 
    /* find next filter with priv options */
    while ((f = av_bsf_iterate(opaque))) {
        if (f->priv_class)
            return f->priv_class;
    }
    return NULL;
}