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https://github.com/nyanmisaka/ffmpeg-rockchip.git
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CDXL demuxer and decoder
Signed-off-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Paul B Mahol
committed by
Diego Biurrun
Diego Biurrun
parent
c1df37e59b
commit
dc4e57489f
@@ -55,6 +55,7 @@ OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o mov_chan.o \
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OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += cavsvideodec.o rawdec.o
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OBJS-$(CONFIG_CAVSVIDEO_MUXER) += rawenc.o
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OBJS-$(CONFIG_CDG_DEMUXER) += cdg.o
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OBJS-$(CONFIG_CDXL_DEMUXER) += cdxl.o
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OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
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OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
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OBJS-$(CONFIG_DAUD_MUXER) += daud.o
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@@ -76,6 +76,7 @@ void av_register_all(void)
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REGISTER_DEMUXER (CAF, caf);
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REGISTER_MUXDEMUX (CAVSVIDEO, cavsvideo);
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REGISTER_DEMUXER (CDG, cdg);
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REGISTER_DEMUXER (CDXL, cdxl);
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REGISTER_MUXER (CRC, crc);
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REGISTER_MUXDEMUX (DAUD, daud);
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REGISTER_DEMUXER (DFA, dfa);
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170
libavformat/cdxl.c
Normal file
170
libavformat/cdxl.c
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@@ -0,0 +1,170 @@
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/*
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* CDXL demuxer
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* Copyright (c) 2011-2012 Paul B Mahol
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "internal.h"
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#define CDXL_HEADER_SIZE 32
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typedef struct CDXLDemuxContext {
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AVClass *class;
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int sample_rate;
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char *framerate;
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AVRational fps;
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int read_chunk;
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uint8_t header[CDXL_HEADER_SIZE];
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int video_stream_index;
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int audio_stream_index;
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} CDXLDemuxContext;
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static int cdxl_read_header(AVFormatContext *s)
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{
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CDXLDemuxContext *cdxl = s->priv_data;
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int ret;
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if ((ret = av_parse_video_rate(&cdxl->fps, cdxl->framerate)) < 0) {
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av_log(s, AV_LOG_ERROR,
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"Could not parse framerate: %s.\n", cdxl->framerate);
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return ret;
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}
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cdxl->read_chunk = 0;
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cdxl->video_stream_index = -1;
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cdxl->audio_stream_index = -1;
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s->ctx_flags |= AVFMTCTX_NOHEADER;
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return 0;
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}
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static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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CDXLDemuxContext *cdxl = s->priv_data;
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AVIOContext *pb = s->pb;
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uint32_t current_size;
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uint16_t audio_size, palette_size;
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int32_t video_size;
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int64_t pos;
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int ret;
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if (pb->eof_reached)
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return AVERROR_EOF;
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pos = avio_tell(pb);
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if (!cdxl->read_chunk &&
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avio_read(pb, cdxl->header, CDXL_HEADER_SIZE) != CDXL_HEADER_SIZE)
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return AVERROR_EOF;
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if (cdxl->header[0] != 1) {
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av_log(s, AV_LOG_ERROR, "non-standard cdxl file\n");
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return AVERROR_INVALIDDATA;
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}
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current_size = AV_RB32(&cdxl->header[2]);
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palette_size = AV_RB16(&cdxl->header[20]);
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audio_size = AV_RB16(&cdxl->header[22]);
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if (palette_size > 512)
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return AVERROR_INVALIDDATA;
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if (current_size < audio_size + palette_size + CDXL_HEADER_SIZE)
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return AVERROR_INVALIDDATA;
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video_size = current_size - audio_size - CDXL_HEADER_SIZE;
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if (cdxl->read_chunk && audio_size) {
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if (cdxl->audio_stream_index == -1) {
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_tag = 0;
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st->codec->codec_id = CODEC_ID_PCM_S8;
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st->codec->channels = cdxl->header[1] & 0x10 ? 2 : 1;
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st->codec->sample_rate = cdxl->sample_rate;
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cdxl->audio_stream_index = st->index;
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avpriv_set_pts_info(st, 32, 1, cdxl->sample_rate);
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}
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ret = av_get_packet(pb, pkt, audio_size);
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if (ret < 0)
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return ret;
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pkt->stream_index = cdxl->audio_stream_index;
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pkt->pos = pos;
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pkt->duration = audio_size;
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cdxl->read_chunk = 0;
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} else {
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if (cdxl->video_stream_index == -1) {
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_tag = 0;
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st->codec->codec_id = CODEC_ID_CDXL;
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st->codec->width = AV_RB16(&cdxl->header[14]);
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st->codec->height = AV_RB16(&cdxl->header[16]);
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cdxl->video_stream_index = st->index;
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avpriv_set_pts_info(st, 63, cdxl->fps.den, cdxl->fps.num);
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}
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if (av_new_packet(pkt, video_size + CDXL_HEADER_SIZE) < 0)
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return AVERROR(ENOMEM);
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memcpy(pkt->data, cdxl->header, CDXL_HEADER_SIZE);
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ret = avio_read(pb, pkt->data + CDXL_HEADER_SIZE, video_size);
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if (ret < 0) {
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av_free_packet(pkt);
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return ret;
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}
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pkt->stream_index = cdxl->video_stream_index;
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pkt->flags |= AV_PKT_FLAG_KEY;
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pkt->pos = pos;
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cdxl->read_chunk = audio_size;
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}
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return ret;
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}
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#define OFFSET(x) offsetof(CDXLDemuxContext, x)
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static const AVOption cdxl_options[] = {
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{ "sample_rate", "", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .dbl = 11025 }, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "10" }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
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{ NULL },
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};
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static const AVClass cdxl_demuxer_class = {
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.class_name = "CDXL demuxer",
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.item_name = av_default_item_name,
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.option = cdxl_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVInputFormat ff_cdxl_demuxer = {
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.name = "cdxl",
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.long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video format"),
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.priv_data_size = sizeof(CDXLDemuxContext),
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.read_header = cdxl_read_header,
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.read_packet = cdxl_read_packet,
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.extensions = "cdxl,xl",
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.flags = AVFMT_GENERIC_INDEX,
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.priv_class = &cdxl_demuxer_class,
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};
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@@ -30,7 +30,7 @@
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#include "libavutil/avutil.h"
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#define LIBAVFORMAT_VERSION_MAJOR 54
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#define LIBAVFORMAT_VERSION_MINOR 0
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#define LIBAVFORMAT_VERSION_MINOR 1
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#define LIBAVFORMAT_VERSION_MICRO 0
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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