mirror of
https://github.com/FFmpeg/FFmpeg.git
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70a90fb73e
This is by definition the appropriate place for it. Remove all the now unnecessary libavcodec/internal.h inclusions; also remove other unnecessary headers from the affected files. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
254 lines
7.2 KiB
C
254 lines
7.2 KiB
C
/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "av1_parse.h"
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#include "bsf.h"
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#include "bsf_internal.h"
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#include "h264.h"
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#include "hevc.h"
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#include "startcode.h"
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#include "vc1_common.h"
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enum RemoveFreq {
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REMOVE_FREQ_KEYFRAME,
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REMOVE_FREQ_ALL,
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REMOVE_FREQ_NONKEYFRAME,
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};
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#define START_CODE 0x000001
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typedef struct RemoveExtradataContext {
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const AVClass *class;
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int freq;
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} RemoveExtradataContext;
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static int av1_split(const uint8_t *buf, int buf_size, void *logctx)
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{
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AV1OBU obu;
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const uint8_t *ptr = buf, *end = buf + buf_size;
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while (ptr < end) {
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int len = ff_av1_extract_obu(&obu, ptr, buf_size, logctx);
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if (len < 0)
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break;
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if (obu.type == AV1_OBU_FRAME_HEADER ||
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obu.type == AV1_OBU_FRAME) {
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return ptr - buf;
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}
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ptr += len;
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buf_size -= len;
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}
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return 0;
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}
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static int h264_split(const uint8_t *buf, int buf_size)
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{
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const uint8_t *ptr = buf, *end = buf + buf_size;
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uint32_t state = -1;
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int has_sps = 0;
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int has_pps = 0;
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int nalu_type;
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while (ptr < end) {
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ptr = avpriv_find_start_code(ptr, end, &state);
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if ((state & 0xFFFFFF00) != 0x100)
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break;
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nalu_type = state & 0x1F;
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if (nalu_type == H264_NAL_SPS) {
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has_sps = 1;
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} else if (nalu_type == H264_NAL_PPS)
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has_pps = 1;
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/* else if (nalu_type == 0x01 ||
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* nalu_type == 0x02 ||
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* nalu_type == 0x05) {
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* }
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*/
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else if ((nalu_type != H264_NAL_SEI || has_pps) &&
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nalu_type != H264_NAL_AUD && nalu_type != H264_NAL_SPS_EXT &&
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nalu_type != 0x0f) {
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if (has_sps) {
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while (ptr - 4 > buf && ptr[-5] == 0)
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ptr--;
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return ptr - 4 - buf;
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}
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}
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}
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return 0;
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}
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// Split after the parameter sets at the beginning of the stream if they exist.
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static int hevc_split(const uint8_t *buf, int buf_size)
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{
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const uint8_t *ptr = buf, *end = buf + buf_size;
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uint32_t state = -1;
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int has_vps = 0;
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int has_sps = 0;
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int has_pps = 0;
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int nut;
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while (ptr < end) {
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ptr = avpriv_find_start_code(ptr, end, &state);
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if ((state >> 8) != START_CODE)
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break;
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nut = (state >> 1) & 0x3F;
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if (nut == HEVC_NAL_VPS)
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has_vps = 1;
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else if (nut == HEVC_NAL_SPS)
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has_sps = 1;
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else if (nut == HEVC_NAL_PPS)
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has_pps = 1;
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else if ((nut != HEVC_NAL_SEI_PREFIX || has_pps) &&
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nut != HEVC_NAL_AUD) {
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if (has_vps && has_sps) {
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while (ptr - 4 > buf && ptr[-5] == 0)
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ptr--;
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return ptr - 4 - buf;
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}
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}
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}
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return 0;
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}
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static int mpegvideo_split(const uint8_t *buf, int buf_size)
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{
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uint32_t state = -1;
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int found = 0;
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for (int i = 0; i < buf_size; i++) {
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state = (state << 8) | buf[i];
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if (state == 0x1B3) {
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found = 1;
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} else if (found && state != 0x1B5 && state < 0x200 && state >= 0x100)
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return i - 3;
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}
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return 0;
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}
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static int mpeg4video_split(const uint8_t *buf, int buf_size)
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{
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const uint8_t *ptr = buf, *end = buf + buf_size;
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uint32_t state = -1;
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while (ptr < end) {
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ptr = avpriv_find_start_code(ptr, end, &state);
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if (state == 0x1B3 || state == 0x1B6)
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return ptr - 4 - buf;
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}
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return 0;
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}
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static int vc1_split(const uint8_t *buf, int buf_size)
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{
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const uint8_t *ptr = buf, *end = buf + buf_size;
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uint32_t state = -1;
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int charged = 0;
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while (ptr < end) {
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ptr = avpriv_find_start_code(ptr, end, &state);
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if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
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charged = 1;
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} else if (charged && IS_MARKER(state))
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return ptr - 4 - buf;
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}
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return 0;
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}
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static int remove_extradata(AVBSFContext *ctx, AVPacket *pkt)
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{
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RemoveExtradataContext *s = ctx->priv_data;
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int ret;
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ret = ff_bsf_get_packet_ref(ctx, pkt);
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if (ret < 0)
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return ret;
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if (s->freq == REMOVE_FREQ_ALL ||
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(s->freq == REMOVE_FREQ_NONKEYFRAME && !(pkt->flags & AV_PKT_FLAG_KEY)) ||
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(s->freq == REMOVE_FREQ_KEYFRAME && pkt->flags & AV_PKT_FLAG_KEY)) {
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int i;
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switch (ctx->par_in->codec_id) {
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case AV_CODEC_ID_AV1:
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i = av1_split(pkt->data, pkt->size, ctx);
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break;
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case AV_CODEC_ID_AVS2:
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case AV_CODEC_ID_AVS3:
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case AV_CODEC_ID_CAVS:
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case AV_CODEC_ID_MPEG4:
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i = mpeg4video_split(pkt->data, pkt->size);
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break;
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case AV_CODEC_ID_H264:
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i = h264_split(pkt->data, pkt->size);
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break;
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case AV_CODEC_ID_HEVC:
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i = hevc_split(pkt->data, pkt->size);
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break;
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case AV_CODEC_ID_MPEG1VIDEO:
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case AV_CODEC_ID_MPEG2VIDEO:
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i = mpegvideo_split(pkt->data, pkt->size);
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break;
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case AV_CODEC_ID_VC1:
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i = vc1_split(pkt->data, pkt->size);
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break;
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default:
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i = 0;
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}
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pkt->data += i;
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pkt->size -= i;
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}
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return 0;
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}
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#define OFFSET(x) offsetof(RemoveExtradataContext, x)
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#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
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static const AVOption options[] = {
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{ "freq", NULL, OFFSET(freq), AV_OPT_TYPE_INT, { .i64 = REMOVE_FREQ_KEYFRAME }, REMOVE_FREQ_KEYFRAME, REMOVE_FREQ_NONKEYFRAME, FLAGS, "freq" },
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{ "k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_NONKEYFRAME }, .flags = FLAGS, .unit = "freq" },
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{ "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_KEYFRAME }, .flags = FLAGS, .unit = "freq" },
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{ "e", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .flags = FLAGS, .unit = "freq" },
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{ "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .flags = FLAGS, .unit = "freq" },
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{ NULL },
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};
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static const AVClass remove_extradata_class = {
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.class_name = "remove_extradata",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVBitStreamFilter ff_remove_extradata_bsf = {
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.name = "remove_extra",
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.priv_data_size = sizeof(RemoveExtradataContext),
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.priv_class = &remove_extradata_class,
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.filter = remove_extradata,
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};
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