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Diffstat (limited to 'ffmpeg1/libavformat/dxa.c')
-rw-r--r--ffmpeg1/libavformat/dxa.c225
1 files changed, 0 insertions, 225 deletions
diff --git a/ffmpeg1/libavformat/dxa.c b/ffmpeg1/libavformat/dxa.c
deleted file mode 100644
index 22ee2a9..0000000
--- a/ffmpeg1/libavformat/dxa.c
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * DXA demuxer
- * Copyright (c) 2007 Konstantin Shishkov
- *
- * 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/intreadwrite.h"
-#include "avformat.h"
-#include "internal.h"
-#include "riff.h"
-
-#define DXA_EXTRA_SIZE 9
-
-typedef struct{
- int frames;
- int has_sound;
- int bpc;
- uint32_t bytes_left;
- int64_t wavpos, vidpos;
- int readvid;
-}DXAContext;
-
-static int dxa_probe(AVProbeData *p)
-{
- int w, h;
- if (p->buf_size < 15)
- return 0;
- w = AV_RB16(p->buf + 11);
- h = AV_RB16(p->buf + 13);
- /* check file header */
- if (p->buf[0] == 'D' && p->buf[1] == 'E' &&
- p->buf[2] == 'X' && p->buf[3] == 'A' &&
- w && w <= 2048 && h && h <= 2048)
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-static int dxa_read_header(AVFormatContext *s)
-{
- AVIOContext *pb = s->pb;
- DXAContext *c = s->priv_data;
- AVStream *st, *ast;
- uint32_t tag;
- int32_t fps;
- int w, h;
- int num, den;
- int flags;
- int ret;
-
- tag = avio_rl32(pb);
- if (tag != MKTAG('D', 'E', 'X', 'A'))
- return AVERROR_INVALIDDATA;
- flags = avio_r8(pb);
- c->frames = avio_rb16(pb);
- if(!c->frames){
- av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
- return AVERROR_INVALIDDATA;
- }
-
- fps = avio_rb32(pb);
- if(fps > 0){
- den = 1000;
- num = fps;
- }else if (fps < 0){
- den = 100000;
- num = -fps;
- }else{
- den = 10;
- num = 1;
- }
- w = avio_rb16(pb);
- h = avio_rb16(pb);
- c->has_sound = 0;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- // Parse WAV data header
- if(avio_rl32(pb) == MKTAG('W', 'A', 'V', 'E')){
- uint32_t size, fsize;
- c->has_sound = 1;
- size = avio_rb32(pb);
- c->vidpos = avio_tell(pb) + size;
- avio_skip(pb, 16);
- fsize = avio_rl32(pb);
-
- ast = avformat_new_stream(s, NULL);
- if (!ast)
- return AVERROR(ENOMEM);
- ret = ff_get_wav_header(pb, ast->codec, fsize);
- if (ret < 0)
- return ret;
- if (ast->codec->sample_rate > 0)
- avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
- // find 'data' chunk
- while(avio_tell(pb) < c->vidpos && !url_feof(pb)){
- tag = avio_rl32(pb);
- fsize = avio_rl32(pb);
- if(tag == MKTAG('d', 'a', 't', 'a')) break;
- avio_skip(pb, fsize);
- }
- c->bpc = (fsize + c->frames - 1) / c->frames;
- if(ast->codec->block_align)
- c->bpc = ((c->bpc + ast->codec->block_align - 1) / ast->codec->block_align) * ast->codec->block_align;
- c->bytes_left = fsize;
- c->wavpos = avio_tell(pb);
- avio_seek(pb, c->vidpos, SEEK_SET);
- }
-
- /* now we are ready: build format streams */
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_DXA;
- st->codec->width = w;
- st->codec->height = h;
- av_reduce(&den, &num, den, num, (1UL<<31)-1);
- avpriv_set_pts_info(st, 33, num, den);
- /* flags & 0x80 means that image is interlaced,
- * flags & 0x40 means that image has double height
- * either way set true height
- */
- if(flags & 0xC0){
- st->codec->height >>= 1;
- }
- c->readvid = !c->has_sound;
- c->vidpos = avio_tell(pb);
- s->start_time = 0;
- s->duration = (int64_t)c->frames * AV_TIME_BASE * num / den;
- av_log(s, AV_LOG_DEBUG, "%d frame(s)\n",c->frames);
-
- return 0;
-}
-
-static int dxa_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- DXAContext *c = s->priv_data;
- int ret;
- uint32_t size;
- uint8_t buf[DXA_EXTRA_SIZE], pal[768+4];
- int pal_size = 0;
-
- if(!c->readvid && c->has_sound && c->bytes_left){
- c->readvid = 1;
- avio_seek(s->pb, c->wavpos, SEEK_SET);
- size = FFMIN(c->bytes_left, c->bpc);
- ret = av_get_packet(s->pb, pkt, size);
- pkt->stream_index = 1;
- if(ret != size)
- return AVERROR(EIO);
- c->bytes_left -= size;
- c->wavpos = avio_tell(s->pb);
- return 0;
- }
- avio_seek(s->pb, c->vidpos, SEEK_SET);
- while(!url_feof(s->pb) && c->frames){
- avio_read(s->pb, buf, 4);
- switch(AV_RL32(buf)){
- case MKTAG('N', 'U', 'L', 'L'):
- if(av_new_packet(pkt, 4 + pal_size) < 0)
- return AVERROR(ENOMEM);
- pkt->stream_index = 0;
- if(pal_size) memcpy(pkt->data, pal, pal_size);
- memcpy(pkt->data + pal_size, buf, 4);
- c->frames--;
- c->vidpos = avio_tell(s->pb);
- c->readvid = 0;
- return 0;
- case MKTAG('C', 'M', 'A', 'P'):
- pal_size = 768+4;
- memcpy(pal, buf, 4);
- avio_read(s->pb, pal + 4, 768);
- break;
- case MKTAG('F', 'R', 'A', 'M'):
- avio_read(s->pb, buf + 4, DXA_EXTRA_SIZE - 4);
- size = AV_RB32(buf + 5);
- if(size > 0xFFFFFF){
- av_log(s, AV_LOG_ERROR, "Frame size is too big: %d\n", size);
- return AVERROR_INVALIDDATA;
- }
- if(av_new_packet(pkt, size + DXA_EXTRA_SIZE + pal_size) < 0)
- return AVERROR(ENOMEM);
- memcpy(pkt->data + pal_size, buf, DXA_EXTRA_SIZE);
- ret = avio_read(s->pb, pkt->data + DXA_EXTRA_SIZE + pal_size, size);
- if(ret != size){
- av_free_packet(pkt);
- return AVERROR(EIO);
- }
- if(pal_size) memcpy(pkt->data, pal, pal_size);
- pkt->stream_index = 0;
- c->frames--;
- c->vidpos = avio_tell(s->pb);
- c->readvid = 0;
- return 0;
- default:
- av_log(s, AV_LOG_ERROR, "Unknown tag %c%c%c%c\n", buf[0], buf[1], buf[2], buf[3]);
- return AVERROR_INVALIDDATA;
- }
- }
- return AVERROR_EOF;
-}
-
-AVInputFormat ff_dxa_demuxer = {
- .name = "dxa",
- .long_name = NULL_IF_CONFIG_SMALL("DXA"),
- .priv_data_size = sizeof(DXAContext),
- .read_probe = dxa_probe,
- .read_header = dxa_read_header,
- .read_packet = dxa_read_packet,
-};
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