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authorTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
committerTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
commit22e28216336da876e1fd17f380ce42eaf1446769 (patch)
tree444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/libavformat/xa.c
parentae5e8541f6e06e64c28719467cdf366ac57aff31 (diff)
chasing indexing error
Diffstat (limited to 'ffmpeg/libavformat/xa.c')
-rw-r--r--ffmpeg/libavformat/xa.c131
1 files changed, 0 insertions, 131 deletions
diff --git a/ffmpeg/libavformat/xa.c b/ffmpeg/libavformat/xa.c
deleted file mode 100644
index 43661de..0000000
--- a/ffmpeg/libavformat/xa.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Maxis XA (.xa) File Demuxer
- * Copyright (c) 2008 Robert Marston
- *
- * 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
- */
-
-/**
- * @file
- * Maxis XA File Demuxer
- * by Robert Marston (rmarston@gmail.com)
- * for more information on the XA audio format see
- * http://wiki.multimedia.cx/index.php?title=Maxis_XA
- */
-
-#include "libavutil/intreadwrite.h"
-#include "avformat.h"
-#include "internal.h"
-
-#define XA00_TAG MKTAG('X', 'A', 0, 0)
-#define XAI0_TAG MKTAG('X', 'A', 'I', 0)
-#define XAJ0_TAG MKTAG('X', 'A', 'J', 0)
-
-typedef struct MaxisXADemuxContext {
- uint32_t out_size;
- uint32_t sent_bytes;
-} MaxisXADemuxContext;
-
-static int xa_probe(AVProbeData *p)
-{
- int channels, srate, bits_per_sample;
- if (p->buf_size < 24)
- return 0;
- switch(AV_RL32(p->buf)) {
- case XA00_TAG:
- case XAI0_TAG:
- case XAJ0_TAG:
- break;
- default:
- return 0;
- }
- channels = AV_RL16(p->buf + 10);
- srate = AV_RL32(p->buf + 12);
- bits_per_sample = AV_RL16(p->buf + 22);
- if (!channels || channels > 8 || !srate || srate > 192000 ||
- bits_per_sample < 4 || bits_per_sample > 32)
- return 0;
- return AVPROBE_SCORE_EXTENSION;
-}
-
-static int xa_read_header(AVFormatContext *s)
-{
- MaxisXADemuxContext *xa = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
-
- /*Set up the XA Audio Decoder*/
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = AV_CODEC_ID_ADPCM_EA_MAXIS_XA;
- avio_skip(pb, 4); /* Skip the XA ID */
- xa->out_size = avio_rl32(pb);
- avio_skip(pb, 2); /* Skip the tag */
- st->codec->channels = avio_rl16(pb);
- st->codec->sample_rate = avio_rl32(pb);
- avio_skip(pb, 4); /* Skip average byte rate */
- avio_skip(pb, 2); /* Skip block align */
- avio_skip(pb, 2); /* Skip bits-per-sample */
-
- if (!st->codec->channels || !st->codec->sample_rate)
- return AVERROR_INVALIDDATA;
-
- st->codec->bit_rate = av_clip(15LL * st->codec->channels * 8 *
- st->codec->sample_rate / 28, 0, INT_MAX);
-
- avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
- st->start_time = 0;
-
- return 0;
-}
-
-static int xa_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- MaxisXADemuxContext *xa = s->priv_data;
- AVStream *st = s->streams[0];
- AVIOContext *pb = s->pb;
- unsigned int packet_size;
- int ret;
-
- if (xa->sent_bytes >= xa->out_size)
- return AVERROR_EOF;
- /* 1 byte header and 14 bytes worth of samples * number channels per block */
- packet_size = 15*st->codec->channels;
-
- ret = av_get_packet(pb, pkt, packet_size);
- if(ret < 0)
- return ret;
-
- pkt->stream_index = st->index;
- xa->sent_bytes += packet_size;
- pkt->duration = 28;
-
- return ret;
-}
-
-AVInputFormat ff_xa_demuxer = {
- .name = "xa",
- .long_name = NULL_IF_CONFIG_SMALL("Maxis XA"),
- .priv_data_size = sizeof(MaxisXADemuxContext),
- .read_probe = xa_probe,
- .read_header = xa_read_header,
- .read_packet = xa_read_packet,
-};