mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 19:32:13 +00:00
8b48b0adab
Its existence is a remnant of (libavcodec's) lock-manager API which has been removed in a04c2c707de2ce850f79870e84ac9d7ec7aa9143. There is no need to use the same lock for avisynth, chromaprint or tls, so switch to ordinary static mutexes instead. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
594 lines
16 KiB
C
594 lines
16 KiB
C
/*
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* various utility functions for use within FFmpeg
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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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 <stdint.h>
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#include "config.h"
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#include "libavutil/avstring.h"
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#include "libavutil/bprint.h"
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#include "libavutil/time.h"
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#include "libavcodec/internal.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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#if CONFIG_NETWORK
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#include "network.h"
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#endif
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#include "os_support.h"
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/**
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* @file
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* various utility functions for use within FFmpeg
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*/
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/* an arbitrarily chosen "sane" max packet size -- 50M */
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#define SANE_CHUNK_SIZE (50000000)
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/* Read the data in sane-sized chunks and append to pkt.
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* Return the number of bytes read or an error. */
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static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
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{
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int orig_size = pkt->size;
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int ret;
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do {
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int prev_size = pkt->size;
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int read_size;
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/* When the caller requests a lot of data, limit it to the amount
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* left in file or SANE_CHUNK_SIZE when it is not known. */
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read_size = size;
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if (read_size > SANE_CHUNK_SIZE/10) {
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read_size = ffio_limit(s, read_size);
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// If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
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if (ffiocontext(s)->maxsize < 0)
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read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
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}
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ret = av_grow_packet(pkt, read_size);
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if (ret < 0)
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break;
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ret = avio_read(s, pkt->data + prev_size, read_size);
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if (ret != read_size) {
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av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
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break;
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}
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size -= read_size;
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} while (size > 0);
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if (size > 0)
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pkt->flags |= AV_PKT_FLAG_CORRUPT;
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if (!pkt->size)
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av_packet_unref(pkt);
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return pkt->size > orig_size ? pkt->size - orig_size : ret;
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}
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int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
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{
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#if FF_API_INIT_PACKET
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FF_DISABLE_DEPRECATION_WARNINGS
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av_init_packet(pkt);
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pkt->data = NULL;
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pkt->size = 0;
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FF_ENABLE_DEPRECATION_WARNINGS
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#else
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av_packet_unref(pkt);
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#endif
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pkt->pos = avio_tell(s);
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return append_packet_chunked(s, pkt, size);
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}
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int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
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{
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if (!pkt->size)
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return av_get_packet(s, pkt, size);
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return append_packet_chunked(s, pkt, size);
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}
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int av_filename_number_test(const char *filename)
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{
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char buf[1024];
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return filename &&
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(av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
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}
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/**********************************************************/
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unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
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{
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while (tags->id != AV_CODEC_ID_NONE) {
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if (tags->id == id)
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return tags->tag;
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tags++;
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}
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return 0;
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}
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enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
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{
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for (int i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
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if (tag == tags[i].tag)
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return tags[i].id;
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for (int i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
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if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
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return tags[i].id;
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return AV_CODEC_ID_NONE;
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}
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enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
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{
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if (bps <= 0 || bps > 64)
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return AV_CODEC_ID_NONE;
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if (flt) {
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switch (bps) {
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case 32:
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return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
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case 64:
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return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
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default:
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return AV_CODEC_ID_NONE;
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}
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} else {
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bps += 7;
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bps >>= 3;
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if (sflags & (1 << (bps - 1))) {
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switch (bps) {
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case 1:
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return AV_CODEC_ID_PCM_S8;
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case 2:
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return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
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case 3:
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return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
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case 4:
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return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
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case 8:
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return be ? AV_CODEC_ID_PCM_S64BE : AV_CODEC_ID_PCM_S64LE;
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default:
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return AV_CODEC_ID_NONE;
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}
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} else {
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switch (bps) {
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case 1:
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return AV_CODEC_ID_PCM_U8;
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case 2:
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return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
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case 3:
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return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
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case 4:
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return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
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default:
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return AV_CODEC_ID_NONE;
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}
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}
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}
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}
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unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
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{
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unsigned int tag;
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if (!av_codec_get_tag2(tags, id, &tag))
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return 0;
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return tag;
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}
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int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
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unsigned int *tag)
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{
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for (int i = 0; tags && tags[i]; i++) {
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const AVCodecTag *codec_tags = tags[i];
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while (codec_tags->id != AV_CODEC_ID_NONE) {
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if (codec_tags->id == id) {
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*tag = codec_tags->tag;
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return 1;
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}
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codec_tags++;
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}
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}
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return 0;
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}
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enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
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{
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for (int i = 0; tags && tags[i]; i++) {
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enum AVCodecID id = ff_codec_get_id(tags[i], tag);
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if (id != AV_CODEC_ID_NONE)
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return id;
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}
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return AV_CODEC_ID_NONE;
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}
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int ff_alloc_extradata(AVCodecParameters *par, int size)
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{
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av_freep(&par->extradata);
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par->extradata_size = 0;
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if (size < 0 || size >= INT32_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
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return AVERROR(EINVAL);
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par->extradata = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!par->extradata)
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return AVERROR(ENOMEM);
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memset(par->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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par->extradata_size = size;
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return 0;
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}
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/*******************************************************/
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uint64_t ff_ntp_time(void)
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{
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return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
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}
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uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us)
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{
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uint64_t ntp_ts, frac_part, sec;
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uint32_t usec;
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//current ntp time in seconds and micro seconds
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sec = ntp_time_us / 1000000;
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usec = ntp_time_us % 1000000;
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//encoding in ntp timestamp format
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frac_part = usec * 0xFFFFFFFFULL;
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frac_part /= 1000000;
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if (sec > 0xFFFFFFFFULL)
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av_log(NULL, AV_LOG_WARNING, "NTP time format roll over detected\n");
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ntp_ts = sec << 32;
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ntp_ts |= frac_part;
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return ntp_ts;
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}
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uint64_t ff_parse_ntp_time(uint64_t ntp_ts)
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{
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uint64_t sec = ntp_ts >> 32;
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uint64_t frac_part = ntp_ts & 0xFFFFFFFFULL;
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uint64_t usec = (frac_part * 1000000) / 0xFFFFFFFFULL;
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return (sec * 1000000) + usec;
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}
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int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
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{
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const char *p;
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char *q, buf1[20], c;
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int nd, len, percentd_found;
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q = buf;
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p = path;
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percentd_found = 0;
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for (;;) {
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c = *p++;
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if (c == '\0')
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break;
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if (c == '%') {
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do {
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nd = 0;
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while (av_isdigit(*p)) {
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if (nd >= INT_MAX / 10 - 255)
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goto fail;
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nd = nd * 10 + *p++ - '0';
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}
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c = *p++;
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} while (av_isdigit(c));
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switch (c) {
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case '%':
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goto addchar;
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case 'd':
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if (!(flags & AV_FRAME_FILENAME_FLAGS_MULTIPLE) && percentd_found)
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goto fail;
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percentd_found = 1;
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if (number < 0)
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nd += 1;
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snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
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len = strlen(buf1);
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if ((q - buf + len) > buf_size - 1)
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goto fail;
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memcpy(q, buf1, len);
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q += len;
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break;
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default:
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goto fail;
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}
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} else {
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addchar:
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if ((q - buf) < buf_size - 1)
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*q++ = c;
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}
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}
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if (!percentd_found)
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goto fail;
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*q = '\0';
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return 0;
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fail:
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*q = '\0';
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return -1;
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}
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int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
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{
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return av_get_frame_filename2(buf, buf_size, path, number, 0);
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}
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void av_url_split(char *proto, int proto_size,
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char *authorization, int authorization_size,
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char *hostname, int hostname_size,
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int *port_ptr, char *path, int path_size, const char *url)
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{
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const char *p, *ls, *at, *at2, *col, *brk;
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if (port_ptr)
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*port_ptr = -1;
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if (proto_size > 0)
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proto[0] = 0;
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if (authorization_size > 0)
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authorization[0] = 0;
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if (hostname_size > 0)
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hostname[0] = 0;
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if (path_size > 0)
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path[0] = 0;
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/* parse protocol */
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if ((p = strchr(url, ':'))) {
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av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
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p++; /* skip ':' */
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if (*p == '/')
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p++;
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if (*p == '/')
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p++;
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} else {
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/* no protocol means plain filename */
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av_strlcpy(path, url, path_size);
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return;
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}
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/* separate path from hostname */
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ls = p + strcspn(p, "/?#");
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av_strlcpy(path, ls, path_size);
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/* the rest is hostname, use that to parse auth/port */
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if (ls != p) {
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/* authorization (user[:pass]@hostname) */
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at2 = p;
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while ((at = strchr(p, '@')) && at < ls) {
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av_strlcpy(authorization, at2,
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FFMIN(authorization_size, at + 1 - at2));
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p = at + 1; /* skip '@' */
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}
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if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
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/* [host]:port */
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av_strlcpy(hostname, p + 1,
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FFMIN(hostname_size, brk - p));
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if (brk[1] == ':' && port_ptr)
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*port_ptr = atoi(brk + 2);
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} else if ((col = strchr(p, ':')) && col < ls) {
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av_strlcpy(hostname, p,
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FFMIN(col + 1 - p, hostname_size));
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if (port_ptr)
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*port_ptr = atoi(col + 1);
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} else
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av_strlcpy(hostname, p,
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FFMIN(ls + 1 - p, hostname_size));
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}
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}
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int ff_mkdir_p(const char *path)
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{
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int ret = 0;
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char *temp = av_strdup(path);
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char *pos = temp;
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char tmp_ch = '\0';
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if (!path || !temp) {
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return -1;
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}
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if (!av_strncasecmp(temp, "/", 1) || !av_strncasecmp(temp, "\\", 1)) {
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pos++;
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} else if (!av_strncasecmp(temp, "./", 2) || !av_strncasecmp(temp, ".\\", 2)) {
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pos += 2;
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}
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for ( ; *pos != '\0'; ++pos) {
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if (*pos == '/' || *pos == '\\') {
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tmp_ch = *pos;
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*pos = '\0';
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ret = mkdir(temp, 0755);
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*pos = tmp_ch;
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}
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}
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if ((*(pos - 1) != '/') && (*(pos - 1) != '\\')) {
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ret = mkdir(temp, 0755);
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}
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av_free(temp);
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return ret;
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}
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char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
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{
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static const char hex_table_uc[16] = { '0', '1', '2', '3',
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'4', '5', '6', '7',
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'8', '9', 'A', 'B',
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'C', 'D', 'E', 'F' };
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static const char hex_table_lc[16] = { '0', '1', '2', '3',
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'4', '5', '6', '7',
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'8', '9', 'a', 'b',
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'c', 'd', 'e', 'f' };
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const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
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for (int i = 0; i < s; i++) {
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buff[i * 2] = hex_table[src[i] >> 4];
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buff[i * 2 + 1] = hex_table[src[i] & 0xF];
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}
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buff[2 * s] = '\0';
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return buff;
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}
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int ff_hex_to_data(uint8_t *data, const char *p)
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{
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int c, len, v;
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len = 0;
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v = 1;
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for (;;) {
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p += strspn(p, SPACE_CHARS);
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if (*p == '\0')
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break;
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c = av_toupper((unsigned char) *p++);
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if (c >= '0' && c <= '9')
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c = c - '0';
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else if (c >= 'A' && c <= 'F')
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c = c - 'A' + 10;
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else
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break;
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v = (v << 4) | c;
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if (v & 0x100) {
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if (data)
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data[len] = v;
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len++;
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v = 1;
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}
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}
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return len;
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}
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void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
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void *context)
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{
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const char *ptr = str;
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/* Parse key=value pairs. */
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for (;;) {
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const char *key;
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char *dest = NULL, *dest_end;
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int key_len, dest_len = 0;
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/* Skip whitespace and potential commas. */
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while (*ptr && (av_isspace(*ptr) || *ptr == ','))
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ptr++;
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if (!*ptr)
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break;
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key = ptr;
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|
if (!(ptr = strchr(key, '=')))
|
|
break;
|
|
ptr++;
|
|
key_len = ptr - key;
|
|
|
|
callback_get_buf(context, key, key_len, &dest, &dest_len);
|
|
dest_end = dest ? dest + dest_len - 1 : NULL;
|
|
|
|
if (*ptr == '\"') {
|
|
ptr++;
|
|
while (*ptr && *ptr != '\"') {
|
|
if (*ptr == '\\') {
|
|
if (!ptr[1])
|
|
break;
|
|
if (dest && dest < dest_end)
|
|
*dest++ = ptr[1];
|
|
ptr += 2;
|
|
} else {
|
|
if (dest && dest < dest_end)
|
|
*dest++ = *ptr;
|
|
ptr++;
|
|
}
|
|
}
|
|
if (*ptr == '\"')
|
|
ptr++;
|
|
} else {
|
|
for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
|
|
if (dest && dest < dest_end)
|
|
*dest++ = *ptr;
|
|
}
|
|
if (dest)
|
|
*dest = 0;
|
|
}
|
|
}
|
|
|
|
int avformat_network_init(void)
|
|
{
|
|
#if CONFIG_NETWORK
|
|
int ret;
|
|
if ((ret = ff_network_init()) < 0)
|
|
return ret;
|
|
if ((ret = ff_tls_init()) < 0)
|
|
return ret;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int avformat_network_deinit(void)
|
|
{
|
|
#if CONFIG_NETWORK
|
|
ff_network_close();
|
|
ff_tls_deinit();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int ff_is_http_proto(const char *filename) {
|
|
const char *proto = avio_find_protocol_name(filename);
|
|
return proto ? (!av_strcasecmp(proto, "http") || !av_strcasecmp(proto, "https")) : 0;
|
|
}
|
|
|
|
int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf)
|
|
{
|
|
int ret;
|
|
char *str;
|
|
|
|
ret = av_bprint_finalize(buf, &str);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (!av_bprint_is_complete(buf)) {
|
|
av_free(str);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
par->extradata = str;
|
|
/* Note: the string is NUL terminated (so extradata can be read as a
|
|
* string), but the ending character is not accounted in the size (in
|
|
* binary formats you are likely not supposed to mux that character). When
|
|
* extradata is copied, it is also padded with AV_INPUT_BUFFER_PADDING_SIZE
|
|
* zeros. */
|
|
par->extradata_size = buf->len;
|
|
return 0;
|
|
}
|