diff options
| -rw-r--r-- | libavformat/Makefile | 1 | ||||
| -rw-r--r-- | libavformat/allformats.c | 1 | ||||
| -rw-r--r-- | libavformat/eacdata.c | 100 |
3 files changed, 102 insertions, 0 deletions
diff --git a/libavformat/Makefile b/libavformat/Makefile index 9c728c3c94..eafa6c0e04 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -41,6 +41,7 @@ OBJS-$(CONFIG_DV_DEMUXER) += dv.o OBJS-$(CONFIG_DV_MUXER) += dvenc.o OBJS-$(CONFIG_DV1394_DEMUXER) += dv1394.o dv.o OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o riff.o +OBJS-$(CONFIG_EA_CDATA_DEMUXER) += eacdata.o OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o OBJS-$(CONFIG_FFM_DEMUXER) += ffm.o OBJS-$(CONFIG_FFM_MUXER) += ffm.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 1c6df0bc2a..27aa253d63 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -74,6 +74,7 @@ void av_register_all(void) REGISTER_DEMUXER (DV1394, dv1394); REGISTER_DEMUXER (DXA, dxa); REGISTER_DEMUXER (EA, ea); + REGISTER_DEMUXER (EA_CDATA, ea_cdata); REGISTER_MUXDEMUX (FFM, ffm); REGISTER_MUXDEMUX (FLAC, flac); REGISTER_DEMUXER (FLIC, flic); diff --git a/libavformat/eacdata.c b/libavformat/eacdata.c new file mode 100644 index 0000000000..48de32e6ee --- /dev/null +++ b/libavformat/eacdata.c @@ -0,0 +1,100 @@ +/* + * Electronic Arts .cdata file Demuxer + * Copyright (c) 2007 Peter Ross + * + * 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 eacdata.c + * Electronic Arts cdata Format Demuxer + * by Peter Ross (suxen_drol at hotmail dot com) + * + * Technical details here: + * http://wiki.multimedia.cx/index.php?title=EA_Command_And_Conquer_3_Audio_Codec + */ + +#include "avformat.h" + +typedef struct { + unsigned int channels; + unsigned int audio_pts; +} CdataDemuxContext; + +static int cdata_probe(AVProbeData *p) +{ + const uint8_t *b = p->buf; + + if (b[0] == 0x04 && (b[1] == 0x00 || b[1] == 0x04 || b[1] == 0x0C)) + return AVPROBE_SCORE_MAX/8; + return 0; +} + +static int cdata_read_header(AVFormatContext *s, AVFormatParameters *ap) +{ + CdataDemuxContext *cdata = s->priv_data; + ByteIOContext *pb = &s->pb; + unsigned int sample_rate, header; + AVStream *st; + + header = get_be16(pb); + switch (header) { + case 0x0400: cdata->channels = 1; break; + case 0x0404: cdata->channels = 2; break; + case 0x040C: cdata->channels = 4; break; + default: + av_log(s, AV_LOG_INFO, "unknown header 0x%04x\n", header); + return -1; + }; + + sample_rate = get_be16(pb); + url_fskip(pb, 12); + + st = av_new_stream(s, 0); + if (!st) + return AVERROR(ENOMEM); + st->codec->codec_type = CODEC_TYPE_AUDIO; + st->codec->codec_tag = 0; /* no fourcc */ + st->codec->codec_id = CODEC_ID_ADPCM_EA_XAS; + st->codec->channels = cdata->channels; + st->codec->sample_rate = sample_rate; + av_set_pts_info(st, 64, 1, sample_rate); + + cdata->audio_pts = 0; + return 0; +} + +static int cdata_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + CdataDemuxContext *cdata = s->priv_data; + int packet_size = 76*cdata->channels; + + if (av_get_packet(&s->pb, pkt, packet_size) != packet_size) + return AVERROR(EIO); + pkt->pts = cdata->audio_pts++; + return 1; +} + +AVInputFormat ea_cdata_demuxer = { + "ea_cdata", + "Electronic Arts cdata", + sizeof(CdataDemuxContext), + cdata_probe, + cdata_read_header, + cdata_read_packet, + .extensions = "cdata", +}; |