741 lines
17 KiB
C
741 lines
17 KiB
C
/*
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* RAW encoder and decoder
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* Copyright (c) 2001 Fabrice Bellard.
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avformat.h"
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#ifdef CONFIG_ENCODERS
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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 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_ENCODERS
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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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if (ap) {
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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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} else {
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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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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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switch(st->codec->codec_id) {
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case CODEC_ID_PCM_S16LE:
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case CODEC_ID_PCM_S16BE:
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case CODEC_ID_PCM_U16LE:
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case CODEC_ID_PCM_U16BE:
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block_align = 2 * st->codec->channels;
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byte_rate = block_align * st->codec->sample_rate;
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break;
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case CODEC_ID_PCM_S8:
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_MULAW:
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case CODEC_ID_PCM_ALAW:
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block_align = st->codec->channels;
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byte_rate = block_align * st->codec->sample_rate;
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break;
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default:
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block_align = st->codec->block_align;
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byte_rate = st->codec->bit_rate / 8;
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break;
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}
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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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/* 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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/* 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 && 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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/* XXX: improve that by looking at several start codes */
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static int mpegvideo_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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/* we search the first start code. If it is a sequence, gop or
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picture start code then we decide it is an mpeg video
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stream. We do not send highest value to give a chance to mpegts */
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/* NOTE: the search range was restricted to avoid too many false
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detections */
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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] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
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if ((code & 0xffffff00) == 0x100) {
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if (code == SEQ_START_CODE ||
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code == GOP_START_CODE ||
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code == PICTURE_START_CODE)
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return 50 - 1;
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else
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return 0;
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}
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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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AVInputFormat shorten_iformat = {
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"shn",
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"raw shn",
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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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.extensions = "shn",
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};
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AVInputFormat ac3_iformat = {
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"ac3",
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"raw ac3",
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0,
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NULL,
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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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.extensions = "ac3",
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};
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#ifdef CONFIG_ENCODERS
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AVOutputFormat ac3_oformat = {
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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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};
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#endif //CONFIG_ENCODERS
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AVInputFormat dts_iformat = {
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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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.extensions = "dts",
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};
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AVInputFormat h261_iformat = {
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"h261",
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"raw h261",
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0,
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h261_probe,
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video_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.extensions = "h261",
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.value = CODEC_ID_H261,
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};
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#ifdef CONFIG_ENCODERS
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AVOutputFormat h261_oformat = {
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"h261",
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"raw h261",
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"video/x-h261",
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"h261",
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0,
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0,
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CODEC_ID_H261,
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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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};
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#endif //CONFIG_ENCODERS
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AVInputFormat h263_iformat = {
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"h263",
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"raw h263",
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0,
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h263_probe,
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video_read_header,
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raw_read_partial_packet,
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raw_read_close,
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// .extensions = "h263", //FIXME remove after writing mpeg4_probe
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.value = CODEC_ID_H263,
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};
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#ifdef CONFIG_ENCODERS
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AVOutputFormat h263_oformat = {
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"h263",
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"raw h263",
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"video/x-h263",
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"h263",
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0,
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0,
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CODEC_ID_H263,
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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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};
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#endif //CONFIG_ENCODERS
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AVInputFormat m4v_iformat = {
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"m4v",
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"raw MPEG4 video format",
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0,
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NULL /*mpegvideo_probe*/,
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video_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.extensions = "m4v", //FIXME remove after writing mpeg4_probe
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.value = CODEC_ID_MPEG4,
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};
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#ifdef CONFIG_ENCODERS
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AVOutputFormat m4v_oformat = {
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"m4v",
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"raw MPEG4 video format",
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NULL,
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"m4v",
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0,
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CODEC_ID_NONE,
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CODEC_ID_MPEG4,
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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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};
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#endif //CONFIG_ENCODERS
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AVInputFormat h264_iformat = {
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"h264",
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"raw H264 video format",
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0,
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NULL /*mpegvideo_probe*/,
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video_read_header,
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raw_read_partial_packet,
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raw_read_close,
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.extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
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.value = CODEC_ID_H264,
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};
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#ifdef CONFIG_ENCODERS
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AVOutputFormat h264_oformat = {
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"h264",
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"raw H264 video format",
|
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NULL,
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"h264",
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0,
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CODEC_ID_NONE,
|
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CODEC_ID_H264,
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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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};
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#endif //CONFIG_ENCODERS
|
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|
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AVInputFormat mpegvideo_iformat = {
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"mpegvideo",
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"MPEG video",
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0,
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mpegvideo_probe,
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video_read_header,
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raw_read_partial_packet,
|
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raw_read_close,
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.value = CODEC_ID_MPEG1VIDEO,
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};
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|
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#ifdef CONFIG_ENCODERS
|
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AVOutputFormat mpeg1video_oformat = {
|
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"mpeg1video",
|
|
"MPEG video",
|
|
"video/x-mpeg",
|
|
"mpg,mpeg,m1v",
|
|
0,
|
|
0,
|
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CODEC_ID_MPEG1VIDEO,
|
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raw_write_header,
|
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raw_write_packet,
|
|
raw_write_trailer,
|
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};
|
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#endif //CONFIG_ENCODERS
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
AVOutputFormat mpeg2video_oformat = {
|
|
"mpeg2video",
|
|
"MPEG2 video",
|
|
NULL,
|
|
"m2v",
|
|
0,
|
|
0,
|
|
CODEC_ID_MPEG2VIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
AVInputFormat mjpeg_iformat = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
0,
|
|
NULL,
|
|
video_read_header,
|
|
raw_read_partial_packet,
|
|
raw_read_close,
|
|
.extensions = "mjpg,mjpeg",
|
|
.value = CODEC_ID_MJPEG,
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
AVOutputFormat mjpeg_oformat = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
"video/x-mjpeg",
|
|
"mjpg,mjpeg",
|
|
0,
|
|
0,
|
|
CODEC_ID_MJPEG,
|
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raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
/* pcm formats */
|
|
|
|
#define PCMINPUTDEF(name, long_name, ext, codec) \
|
|
AVInputFormat pcm_ ## name ## _iformat = {\
|
|
#name,\
|
|
long_name,\
|
|
0,\
|
|
NULL,\
|
|
raw_read_header,\
|
|
raw_read_packet,\
|
|
raw_read_close,\
|
|
pcm_read_seek,\
|
|
.extensions = ext,\
|
|
.value = codec,\
|
|
};
|
|
|
|
#if !defined(CONFIG_ENCODERS) && defined(CONFIG_DECODERS)
|
|
|
|
#define PCMDEF(name, long_name, ext, codec) \
|
|
PCMINPUTDEF(name, long_name, ext, codec)
|
|
|
|
#else
|
|
|
|
#define PCMDEF(name, long_name, ext, codec) \
|
|
PCMINPUTDEF(name, long_name, ext, codec)\
|
|
\
|
|
AVOutputFormat pcm_ ## name ## _oformat = {\
|
|
#name,\
|
|
long_name,\
|
|
NULL,\
|
|
ext,\
|
|
0,\
|
|
codec,\
|
|
0,\
|
|
raw_write_header,\
|
|
raw_write_packet,\
|
|
raw_write_trailer,\
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
#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_iformat = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
0,
|
|
NULL,
|
|
raw_read_header,
|
|
rawvideo_read_packet,
|
|
raw_read_close,
|
|
.extensions = "yuv,cif,qcif",
|
|
.value = CODEC_ID_RAWVIDEO,
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
AVOutputFormat rawvideo_oformat = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
NULL,
|
|
"yuv",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat null_oformat = {
|
|
"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,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
#ifndef CONFIG_ENCODERS
|
|
#define av_register_output_format(format)
|
|
#endif
|
|
#ifndef CONFIG_DECODERS
|
|
#define av_register_input_format(format)
|
|
#endif
|
|
|
|
int raw_init(void)
|
|
{
|
|
|
|
av_register_input_format(&shorten_iformat);
|
|
|
|
av_register_input_format(&ac3_iformat);
|
|
av_register_output_format(&ac3_oformat);
|
|
|
|
av_register_input_format(&dts_iformat);
|
|
|
|
av_register_input_format(&h261_iformat);
|
|
av_register_output_format(&h261_oformat);
|
|
|
|
av_register_input_format(&h263_iformat);
|
|
av_register_output_format(&h263_oformat);
|
|
|
|
av_register_input_format(&m4v_iformat);
|
|
av_register_output_format(&m4v_oformat);
|
|
|
|
av_register_input_format(&h264_iformat);
|
|
av_register_output_format(&h264_oformat);
|
|
|
|
av_register_input_format(&mpegvideo_iformat);
|
|
av_register_output_format(&mpeg1video_oformat);
|
|
|
|
av_register_output_format(&mpeg2video_oformat);
|
|
|
|
av_register_input_format(&mjpeg_iformat);
|
|
av_register_output_format(&mjpeg_oformat);
|
|
|
|
av_register_input_format(&pcm_s16le_iformat);
|
|
av_register_output_format(&pcm_s16le_oformat);
|
|
av_register_input_format(&pcm_s16be_iformat);
|
|
av_register_output_format(&pcm_s16be_oformat);
|
|
av_register_input_format(&pcm_u16le_iformat);
|
|
av_register_output_format(&pcm_u16le_oformat);
|
|
av_register_input_format(&pcm_u16be_iformat);
|
|
av_register_output_format(&pcm_u16be_oformat);
|
|
av_register_input_format(&pcm_s8_iformat);
|
|
av_register_output_format(&pcm_s8_oformat);
|
|
av_register_input_format(&pcm_u8_iformat);
|
|
av_register_output_format(&pcm_u8_oformat);
|
|
av_register_input_format(&pcm_mulaw_iformat);
|
|
av_register_output_format(&pcm_mulaw_oformat);
|
|
av_register_input_format(&pcm_alaw_iformat);
|
|
av_register_output_format(&pcm_alaw_oformat);
|
|
|
|
av_register_input_format(&rawvideo_iformat);
|
|
av_register_output_format(&rawvideo_oformat);
|
|
|
|
av_register_output_format(&null_oformat);
|
|
return 0;
|
|
}
|