mirror of https://git.ffmpeg.org/ffmpeg.git
902 lines
21 KiB
C
902 lines
21 KiB
C
/*
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* RAW muxer and demuxer
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* Copyright (c) 2001 Fabrice Bellard.
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* Copyright (c) 2005 Alex Beregszaszi
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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 "avformat.h"
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#include "ac3.h"
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#ifdef CONFIG_MUXERS
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/* simple formats */
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static int raw_write_header(struct AVFormatContext *s)
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{
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return 0;
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}
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static int flac_write_header(struct AVFormatContext *s)
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{
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static const uint8_t header[8] = {
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0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
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};
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uint8_t *streaminfo = s->streams[0]->codec->extradata;
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int len = s->streams[0]->codec->extradata_size;
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if(streaminfo != NULL && len > 0) {
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put_buffer(&s->pb, header, 8);
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put_buffer(&s->pb, streaminfo, len);
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}
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return 0;
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}
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static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
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{
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put_buffer(&s->pb, pkt->data, pkt->size);
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put_flush_packet(&s->pb);
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return 0;
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}
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static int raw_write_trailer(struct AVFormatContext *s)
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{
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return 0;
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}
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#endif //CONFIG_MUXERS
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/* raw input */
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static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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AVStream *st;
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int id;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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id = s->iformat->value;
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if (id == CODEC_ID_RAWVIDEO) {
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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} else {
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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}
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st->codec->codec_id = id;
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switch(st->codec->codec_type) {
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case CODEC_TYPE_AUDIO:
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st->codec->sample_rate = ap->sample_rate;
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st->codec->channels = ap->channels;
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av_set_pts_info(st, 64, 1, st->codec->sample_rate);
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break;
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case CODEC_TYPE_VIDEO:
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av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
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st->codec->width = ap->width;
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st->codec->height = ap->height;
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st->codec->pix_fmt = ap->pix_fmt;
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if(st->codec->pix_fmt == PIX_FMT_NONE)
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st->codec->pix_fmt= PIX_FMT_YUV420P;
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break;
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default:
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return -1;
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}
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return 0;
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}
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#define RAW_PACKET_SIZE 1024
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static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, size;
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// AVStream *st = s->streams[0];
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size= RAW_PACKET_SIZE;
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ret= av_get_packet(&s->pb, pkt, size);
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pkt->stream_index = 0;
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if (ret <= 0) {
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return AVERROR_IO;
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}
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/* note: we need to modify the packet size here to handle the last
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packet */
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pkt->size = ret;
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return ret;
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}
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static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, size;
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size = RAW_PACKET_SIZE;
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if (av_new_packet(pkt, size) < 0)
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return AVERROR_IO;
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pkt->pos= url_ftell(&s->pb);
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pkt->stream_index = 0;
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ret = get_partial_buffer(&s->pb, pkt->data, size);
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if (ret <= 0) {
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av_free_packet(pkt);
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return AVERROR_IO;
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}
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pkt->size = ret;
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return ret;
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}
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// http://www.artificis.hu/files/texts/ingenient.txt
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static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, size, w, h, unk1, unk2;
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if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
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return AVERROR_IO; // FIXME
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size = get_le32(&s->pb);
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w = get_le16(&s->pb);
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h = get_le16(&s->pb);
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url_fskip(&s->pb, 8); // zero + size (padded?)
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url_fskip(&s->pb, 2);
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unk1 = get_le16(&s->pb);
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unk2 = get_le16(&s->pb);
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url_fskip(&s->pb, 22); // ascii timestamp
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av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
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size, w, h, unk1, unk2);
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if (av_new_packet(pkt, size) < 0)
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return AVERROR_IO;
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pkt->pos = url_ftell(&s->pb);
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pkt->stream_index = 0;
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ret = get_buffer(&s->pb, pkt->data, size);
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if (ret <= 0) {
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av_free_packet(pkt);
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return AVERROR_IO;
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}
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pkt->size = ret;
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return ret;
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}
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static int raw_read_close(AVFormatContext *s)
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{
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return 0;
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}
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int pcm_read_seek(AVFormatContext *s,
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int stream_index, int64_t timestamp, int flags)
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{
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AVStream *st;
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int block_align, byte_rate;
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int64_t pos;
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st = s->streams[0];
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block_align = st->codec->block_align ? st->codec->block_align :
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(av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
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byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
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block_align * st->codec->sample_rate;
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if (block_align <= 0 || byte_rate <= 0)
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return -1;
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/* compute the position by aligning it to block_align */
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pos = av_rescale_rnd(timestamp * byte_rate,
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st->time_base.num,
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st->time_base.den * (int64_t)block_align,
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(flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
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pos *= block_align;
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/* recompute exact position */
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st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
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url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
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return 0;
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}
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/* ac3 read */
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static int ac3_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_AC3;
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st->need_parsing = 1;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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static int shorten_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_SHORTEN;
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st->need_parsing = 1;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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/* flac read */
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static int flac_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_FLAC;
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st->need_parsing = 1;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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/* dts read */
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static int dts_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_DTS;
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st->need_parsing = 1;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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/* aac read */
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static int aac_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_AAC;
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st->need_parsing = 1;
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/* the parameters will be extracted from the compressed bitstream */
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return 0;
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}
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/* mpeg1/h263 input */
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static int video_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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AVStream *st;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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st->codec->codec_id = s->iformat->value;
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st->need_parsing = 1;
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/* for mjpeg, specify frame rate */
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/* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
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if (ap->time_base.num) {
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av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
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} else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
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st->codec->codec_id == CODEC_ID_MPEG4 ||
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st->codec->codec_id == CODEC_ID_H264) {
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av_set_pts_info(st, 64, 1, 25);
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}
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return 0;
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}
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#define SEQ_START_CODE 0x000001b3
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#define GOP_START_CODE 0x000001b8
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#define PICTURE_START_CODE 0x00000100
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#define SLICE_START_CODE 0x00000101
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#define PACK_START_CODE 0x000001ba
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#define VIDEO_ID 0x000001e0
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#define AUDIO_ID 0x000001c0
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static int mpegvideo_probe(AVProbeData *p)
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{
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uint32_t code= -1;
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int pic=0, seq=0, slice=0, pspack=0, pes=0;
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int i;
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for(i=0; i<p->buf_size; i++){
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code = (code<<8) + p->buf[i];
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if ((code & 0xffffff00) == 0x100) {
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switch(code){
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case SEQ_START_CODE: seq++; break;
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case PICTURE_START_CODE: pic++; break;
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case SLICE_START_CODE: slice++; break;
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case PACK_START_CODE: pspack++; break;
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case VIDEO_ID:
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case AUDIO_ID: pes++; break;
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}
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}
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}
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if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
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return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
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return 0;
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}
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#define VIDEO_OBJECT_START_CODE 0x00000100
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#define VIDEO_OBJECT_LAYER_START_CODE 0x00000120
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#define VISUAL_OBJECT_START_CODE 0x000001b5
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#define VOP_START_CODE 0x000001b6
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static int mpeg4video_probe(AVProbeData *probe_packet)
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{
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uint32_t temp_buffer= -1;
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int VO=0, VOL=0, VOP = 0, VISO = 0;
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int i;
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for(i=0; i<probe_packet->buf_size; i++){
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temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
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if ((temp_buffer & 0xffffff00) == 0x100) {
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switch(temp_buffer){
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case VOP_START_CODE: VOP++; break;
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case VISUAL_OBJECT_START_CODE: VISO++; break;
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}
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switch(temp_buffer & 0xfffffff0){
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case VIDEO_OBJECT_START_CODE: VO++; break;
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case VIDEO_OBJECT_LAYER_START_CODE: VOL++; break;
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}
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}
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}
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if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0)
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return AVPROBE_SCORE_MAX/2;
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return 0;
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}
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static int h263_probe(AVProbeData *p)
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{
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int code;
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const uint8_t *d;
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if (p->buf_size < 6)
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return 0;
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d = p->buf;
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code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
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if (code == 0x20) {
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return 50;
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}
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return 0;
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}
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static int h261_probe(AVProbeData *p)
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{
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int code;
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const uint8_t *d;
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if (p->buf_size < 6)
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return 0;
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d = p->buf;
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code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
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if (code == 0x10) {
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return 50;
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}
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return 0;
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}
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static int ac3_probe(AVProbeData *p)
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{
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int max_frames, first_frames, frames;
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uint8_t *buf, *buf2, *end;
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AC3HeaderInfo hdr;
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if(p->buf_size < 7)
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return 0;
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max_frames = 0;
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buf = p->buf;
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end = buf + FFMIN(4096, p->buf_size - 7);
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for(; buf < end; buf++) {
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buf2 = buf;
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for(frames = 0; buf2 < end; frames++) {
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if(ff_ac3_parse_header(buf2, &hdr) < 0)
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break;
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buf2 += hdr.frame_size;
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}
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max_frames = FFMAX(max_frames, frames);
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if(buf == p->buf)
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first_frames = frames;
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}
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if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
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else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
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else if(max_frames>=1) return 1;
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else return 0;
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}
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AVInputFormat shorten_demuxer = {
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"shn",
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"raw shorten",
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0,
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NULL,
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shorten_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "shn",
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};
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AVInputFormat flac_demuxer = {
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"flac",
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"raw flac",
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0,
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NULL,
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flac_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "flac",
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};
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#ifdef CONFIG_MUXERS
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AVOutputFormat flac_muxer = {
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"flac",
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"raw flac",
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"audio/x-flac",
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"flac",
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0,
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CODEC_ID_FLAC,
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0,
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flac_write_header,
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raw_write_packet,
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raw_write_trailer,
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.flags= AVFMT_NOTIMESTAMPS,
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};
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#endif //CONFIG_MUXERS
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AVInputFormat ac3_demuxer = {
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"ac3",
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"raw ac3",
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0,
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ac3_probe,
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ac3_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "ac3",
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};
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#ifdef CONFIG_MUXERS
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AVOutputFormat ac3_muxer = {
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"ac3",
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"raw ac3",
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"audio/x-ac3",
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"ac3",
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0,
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CODEC_ID_AC3,
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0,
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raw_write_header,
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raw_write_packet,
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raw_write_trailer,
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.flags= AVFMT_NOTIMESTAMPS,
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};
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#endif //CONFIG_MUXERS
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AVInputFormat dts_demuxer = {
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"dts",
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"raw dts",
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0,
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NULL,
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dts_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "dts",
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};
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AVInputFormat aac_demuxer = {
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"aac",
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"ADTS AAC",
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0,
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NULL,
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aac_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "aac",
|
|
};
|
|
|
|
AVInputFormat h261_demuxer = {
|
|
"h261",
|
|
"raw h261",
|
|
0,
|
|
h261_probe,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "h261",
|
|
.value = CODEC_ID_H261,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat h261_muxer = {
|
|
"h261",
|
|
"raw h261",
|
|
"video/x-h261",
|
|
"h261",
|
|
0,
|
|
0,
|
|
CODEC_ID_H261,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
AVInputFormat h263_demuxer = {
|
|
"h263",
|
|
"raw h263",
|
|
0,
|
|
h263_probe,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
// .extensions = "h263", //FIXME remove after writing mpeg4_probe
|
|
.value = CODEC_ID_H263,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat h263_muxer = {
|
|
"h263",
|
|
"raw h263",
|
|
"video/x-h263",
|
|
"h263",
|
|
0,
|
|
0,
|
|
CODEC_ID_H263,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
AVInputFormat m4v_demuxer = {
|
|
"m4v",
|
|
"raw MPEG4 video format",
|
|
0,
|
|
mpeg4video_probe, /** probing for mpeg4 data */
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "m4v", //FIXME remove after writing mpeg4_probe
|
|
.value = CODEC_ID_MPEG4,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat m4v_muxer = {
|
|
"m4v",
|
|
"raw MPEG4 video format",
|
|
NULL,
|
|
"m4v",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_MPEG4,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
AVInputFormat h264_demuxer = {
|
|
"h264",
|
|
"raw H264 video format",
|
|
0,
|
|
NULL /*mpegvideo_probe*/,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
|
|
.value = CODEC_ID_H264,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat h264_muxer = {
|
|
"h264",
|
|
"raw H264 video format",
|
|
NULL,
|
|
"h264",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_H264,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
AVInputFormat mpegvideo_demuxer = {
|
|
"mpegvideo",
|
|
"MPEG video",
|
|
0,
|
|
mpegvideo_probe,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.value = CODEC_ID_MPEG1VIDEO,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat mpeg1video_muxer = {
|
|
"mpeg1video",
|
|
"MPEG video",
|
|
"video/x-mpeg",
|
|
"mpg,mpeg,m1v",
|
|
0,
|
|
0,
|
|
CODEC_ID_MPEG1VIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat mpeg2video_muxer = {
|
|
"mpeg2video",
|
|
"MPEG2 video",
|
|
NULL,
|
|
"m2v",
|
|
0,
|
|
0,
|
|
CODEC_ID_MPEG2VIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
AVInputFormat mjpeg_demuxer = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
0,
|
|
NULL,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "mjpg,mjpeg",
|
|
.value = CODEC_ID_MJPEG,
|
|
};
|
|
|
|
AVInputFormat ingenient_demuxer = {
|
|
"ingenient",
|
|
"Ingenient MJPEG",
|
|
0,
|
|
NULL,
|
|
video_read_header,
|
|
ingenient_read_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "cgi", // FIXME
|
|
.value = CODEC_ID_MJPEG,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat mjpeg_muxer = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
"video/x-mjpeg",
|
|
"mjpg,mjpeg",
|
|
0,
|
|
0,
|
|
CODEC_ID_MJPEG,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
AVInputFormat vc1_demuxer = {
|
|
"vc1",
|
|
"raw vc1",
|
|
0,
|
|
NULL /* vc1_probe */,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.extensions = "vc1",
|
|
.value = CODEC_ID_VC1,
|
|
};
|
|
|
|
/* pcm formats */
|
|
|
|
#define PCMINPUTDEF(name, long_name, ext, codec) \
|
|
AVInputFormat pcm_ ## name ## _demuxer = {\
|
|
#name,\
|
|
long_name,\
|
|
0,\
|
|
NULL,\
|
|
raw_read_header,\
|
|
raw_read_packet,\
|
|
raw_read_close,\
|
|
pcm_read_seek,\
|
|
.flags= AVFMT_GENERIC_INDEX,\
|
|
.extensions = ext,\
|
|
.value = codec,\
|
|
};
|
|
|
|
#define PCMOUTPUTDEF(name, long_name, ext, codec) \
|
|
AVOutputFormat pcm_ ## name ## _muxer = {\
|
|
#name,\
|
|
long_name,\
|
|
NULL,\
|
|
ext,\
|
|
0,\
|
|
codec,\
|
|
0,\
|
|
raw_write_header,\
|
|
raw_write_packet,\
|
|
raw_write_trailer,\
|
|
.flags= AVFMT_NOTIMESTAMPS,\
|
|
};
|
|
|
|
|
|
#if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
|
|
#define PCMDEF(name, long_name, ext, codec) \
|
|
PCMINPUTDEF(name, long_name, ext, codec)
|
|
#elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
|
|
#define PCMDEF(name, long_name, ext, codec) \
|
|
PCMOUTPUTDEF(name, long_name, ext, codec)
|
|
#elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
|
|
#define PCMDEF(name, long_name, ext, codec) \
|
|
PCMINPUTDEF(name, long_name, ext, codec)\
|
|
PCMOUTPUTDEF(name, long_name, ext, codec)
|
|
#else
|
|
#define PCMDEF(name, long_name, ext, codec)
|
|
#endif
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
#define BE_DEF(s) s
|
|
#define LE_DEF(s) NULL
|
|
#else
|
|
#define BE_DEF(s) NULL
|
|
#define LE_DEF(s) s
|
|
#endif
|
|
|
|
|
|
PCMDEF(s16le, "pcm signed 16 bit little endian format",
|
|
LE_DEF("sw"), CODEC_ID_PCM_S16LE)
|
|
|
|
PCMDEF(s16be, "pcm signed 16 bit big endian format",
|
|
BE_DEF("sw"), CODEC_ID_PCM_S16BE)
|
|
|
|
PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
|
|
LE_DEF("uw"), CODEC_ID_PCM_U16LE)
|
|
|
|
PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
|
|
BE_DEF("uw"), CODEC_ID_PCM_U16BE)
|
|
|
|
PCMDEF(s8, "pcm signed 8 bit format",
|
|
"sb", CODEC_ID_PCM_S8)
|
|
|
|
PCMDEF(u8, "pcm unsigned 8 bit format",
|
|
"ub", CODEC_ID_PCM_U8)
|
|
|
|
PCMDEF(mulaw, "pcm mu law format",
|
|
"ul", CODEC_ID_PCM_MULAW)
|
|
|
|
PCMDEF(alaw, "pcm A law format",
|
|
"al", CODEC_ID_PCM_ALAW)
|
|
|
|
static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int packet_size, ret, width, height;
|
|
AVStream *st = s->streams[0];
|
|
|
|
width = st->codec->width;
|
|
height = st->codec->height;
|
|
|
|
packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
|
|
if (packet_size < 0)
|
|
return -1;
|
|
|
|
ret= av_get_packet(&s->pb, pkt, packet_size);
|
|
|
|
pkt->stream_index = 0;
|
|
if (ret != packet_size) {
|
|
return AVERROR_IO;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
AVInputFormat rawvideo_demuxer = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
0,
|
|
NULL,
|
|
raw_read_header,
|
|
rawvideo_read_packet,
|
|
raw_read_close,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "yuv,cif,qcif",
|
|
.value = CODEC_ID_RAWVIDEO,
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
AVOutputFormat rawvideo_muxer = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
NULL,
|
|
"yuv",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat null_muxer = {
|
|
"null",
|
|
"null video format",
|
|
NULL,
|
|
NULL,
|
|
0,
|
|
#ifdef WORDS_BIGENDIAN
|
|
CODEC_ID_PCM_S16BE,
|
|
#else
|
|
CODEC_ID_PCM_S16LE,
|
|
#endif
|
|
CODEC_ID_RAWVIDEO,
|
|
raw_write_header,
|
|
null_write_packet,
|
|
raw_write_trailer,
|
|
.flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif //CONFIG_MUXERS
|