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Diffstat (limited to 'ffmpeg1/libavformat/cdxl.c')
-rw-r--r--ffmpeg1/libavformat/cdxl.c231
1 files changed, 0 insertions, 231 deletions
diff --git a/ffmpeg1/libavformat/cdxl.c b/ffmpeg1/libavformat/cdxl.c
deleted file mode 100644
index 185b745..0000000
--- a/ffmpeg1/libavformat/cdxl.c
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * CDXL demuxer
- * Copyright (c) 2011-2012 Paul B Mahol
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "libavutil/channel_layout.h"
-#include "libavutil/intreadwrite.h"
-#include "libavutil/parseutils.h"
-#include "libavutil/opt.h"
-#include "avformat.h"
-#include "internal.h"
-
-#define CDXL_HEADER_SIZE 32
-
-typedef struct CDXLDemuxContext {
- AVClass *class;
- int sample_rate;
- char *framerate;
- AVRational fps;
- int read_chunk;
- uint8_t header[CDXL_HEADER_SIZE];
- int video_stream_index;
- int audio_stream_index;
-} CDXLDemuxContext;
-
-static int cdxl_read_probe(AVProbeData *p)
-{
- int score = AVPROBE_SCORE_MAX / 2 + 10;
-
- if (p->buf_size < CDXL_HEADER_SIZE)
- return 0;
-
- /* reserved bytes should always be set to 0 */
- if (AV_RN64(&p->buf[24]) || AV_RN16(&p->buf[10]))
- return 0;
-
- /* check type */
- if (p->buf[0] != 1)
- return 0;
-
- /* check palette size */
- if (AV_RB16(&p->buf[20]) > 512)
- return 0;
-
- /* check number of planes */
- if (p->buf[18] || !p->buf[19])
- return 0;
-
- /* check widh and height */
- if (!AV_RN16(&p->buf[14]) || !AV_RN16(&p->buf[16]))
- return 0;
-
- /* chunk size */
- if (AV_RB32(&p->buf[2]) < AV_RB16(&p->buf[22]) + AV_RB16(&p->buf[20]) + CDXL_HEADER_SIZE)
- return 0;
-
- /* previous chunk size */
- if (AV_RN32(&p->buf[6]))
- score /= 2;
-
- /* current frame number, usually starts from 1 */
- if (AV_RB16(&p->buf[12]) != 1)
- score /= 2;
-
- return score;
-}
-
-static int cdxl_read_header(AVFormatContext *s)
-{
- CDXLDemuxContext *cdxl = s->priv_data;
- int ret;
-
- if (cdxl->framerate && (ret = av_parse_video_rate(&cdxl->fps, cdxl->framerate)) < 0) {
- av_log(s, AV_LOG_ERROR,
- "Could not parse framerate: %s.\n", cdxl->framerate);
- return ret;
- }
-
- cdxl->read_chunk = 0;
- cdxl->video_stream_index = -1;
- cdxl->audio_stream_index = -1;
-
- s->ctx_flags |= AVFMTCTX_NOHEADER;
-
- return 0;
-}
-
-static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- CDXLDemuxContext *cdxl = s->priv_data;
- AVIOContext *pb = s->pb;
- uint32_t current_size, video_size, image_size;
- uint16_t audio_size, palette_size, width, height;
- int64_t pos;
- int ret;
-
- if (url_feof(pb))
- return AVERROR_EOF;
-
- pos = avio_tell(pb);
- if (!cdxl->read_chunk &&
- avio_read(pb, cdxl->header, CDXL_HEADER_SIZE) != CDXL_HEADER_SIZE)
- return AVERROR_EOF;
- if (cdxl->header[0] != 1) {
- av_log(s, AV_LOG_ERROR, "non-standard cdxl file\n");
- return AVERROR_INVALIDDATA;
- }
-
- current_size = AV_RB32(&cdxl->header[2]);
- width = AV_RB16(&cdxl->header[14]);
- height = AV_RB16(&cdxl->header[16]);
- palette_size = AV_RB16(&cdxl->header[20]);
- audio_size = AV_RB16(&cdxl->header[22]);
- image_size = FFALIGN(width, 16) * height * cdxl->header[19] / 8;
- video_size = palette_size + image_size;
-
- if (palette_size > 512)
- return AVERROR_INVALIDDATA;
- if (current_size < (uint64_t)audio_size + video_size + CDXL_HEADER_SIZE)
- return AVERROR_INVALIDDATA;
-
- if (cdxl->read_chunk && audio_size) {
- if (cdxl->audio_stream_index == -1) {
- AVStream *st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_tag = 0;
- st->codec->codec_id = AV_CODEC_ID_PCM_S8;
- if (cdxl->header[1] & 0x10) {
- st->codec->channels = 2;
- st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
- } else {
- st->codec->channels = 1;
- st->codec->channel_layout = AV_CH_LAYOUT_MONO;
- }
- st->codec->sample_rate = cdxl->sample_rate;
- st->start_time = 0;
- cdxl->audio_stream_index = st->index;
- avpriv_set_pts_info(st, 64, 1, cdxl->sample_rate);
- }
-
- ret = av_get_packet(pb, pkt, audio_size);
- if (ret < 0)
- return ret;
- pkt->stream_index = cdxl->audio_stream_index;
- pkt->pos = pos;
- pkt->duration = audio_size;
- cdxl->read_chunk = 0;
- } else {
- if (cdxl->video_stream_index == -1) {
- AVStream *st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_tag = 0;
- st->codec->codec_id = AV_CODEC_ID_CDXL;
- st->codec->width = width;
- st->codec->height = height;
- st->start_time = 0;
- cdxl->video_stream_index = st->index;
- if (cdxl->framerate)
- avpriv_set_pts_info(st, 64, cdxl->fps.den, cdxl->fps.num);
- else
- avpriv_set_pts_info(st, 64, 1, cdxl->sample_rate);
- }
-
- if (av_new_packet(pkt, video_size + CDXL_HEADER_SIZE) < 0)
- return AVERROR(ENOMEM);
- memcpy(pkt->data, cdxl->header, CDXL_HEADER_SIZE);
- ret = avio_read(pb, pkt->data + CDXL_HEADER_SIZE, video_size);
- if (ret < 0) {
- av_free_packet(pkt);
- return ret;
- }
- av_shrink_packet(pkt, CDXL_HEADER_SIZE + ret);
- pkt->stream_index = cdxl->video_stream_index;
- pkt->flags |= AV_PKT_FLAG_KEY;
- pkt->pos = pos;
- pkt->duration = cdxl->framerate ? 1 : audio_size ? audio_size : 220;
- cdxl->read_chunk = audio_size;
- }
-
- if (!cdxl->read_chunk)
- avio_skip(pb, current_size - audio_size - video_size - CDXL_HEADER_SIZE);
- return ret;
-}
-
-#define OFFSET(x) offsetof(CDXLDemuxContext, x)
-static const AVOption cdxl_options[] = {
- { "sample_rate", "", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 11025 }, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
- { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
- { NULL },
-};
-
-static const AVClass cdxl_demuxer_class = {
- .class_name = "CDXL demuxer",
- .item_name = av_default_item_name,
- .option = cdxl_options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-AVInputFormat ff_cdxl_demuxer = {
- .name = "cdxl",
- .long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
- .priv_data_size = sizeof(CDXLDemuxContext),
- .read_probe = cdxl_read_probe,
- .read_header = cdxl_read_header,
- .read_packet = cdxl_read_packet,
- .extensions = "cdxl,xl",
- .flags = AVFMT_GENERIC_INDEX,
- .priv_class = &cdxl_demuxer_class,
-};
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