diff options
Diffstat (limited to 'ffmpeg/libavformat/iss.c')
| -rw-r--r-- | ffmpeg/libavformat/iss.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/ffmpeg/libavformat/iss.c b/ffmpeg/libavformat/iss.c deleted file mode 100644 index e994531..0000000 --- a/ffmpeg/libavformat/iss.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * ISS (.iss) file demuxer - * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net> - * - * 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 - * Funcom ISS file demuxer - * @author Jaikrishnan Menon - * @see http://wiki.multimedia.cx/index.php?title=FunCom_ISS - */ - -#include "libavutil/channel_layout.h" -#include "avformat.h" -#include "internal.h" -#include "libavutil/avstring.h" - -#define ISS_SIG "IMA_ADPCM_Sound" -#define ISS_SIG_LEN 15 -#define MAX_TOKEN_SIZE 20 - -typedef struct { - int packet_size; - int sample_start_pos; -} IssDemuxContext; - -static void get_token(AVIOContext *s, char *buf, int maxlen) -{ - int i = 0; - char c; - - while ((c = avio_r8(s))) { - if(c == ' ') - break; - if (i < maxlen-1) - buf[i++] = c; - } - - if(!c) - avio_r8(s); - - buf[i] = 0; /* Ensure null terminated, but may be truncated */ -} - -static int iss_probe(AVProbeData *p) -{ - if (strncmp(p->buf, ISS_SIG, ISS_SIG_LEN)) - return 0; - - return AVPROBE_SCORE_MAX; -} - -static av_cold int iss_read_header(AVFormatContext *s) -{ - IssDemuxContext *iss = s->priv_data; - AVIOContext *pb = s->pb; - AVStream *st; - char token[MAX_TOKEN_SIZE]; - int stereo, rate_divisor; - - get_token(pb, token, sizeof(token)); //"IMA_ADPCM_Sound" - get_token(pb, token, sizeof(token)); //packet size - if (sscanf(token, "%d", &iss->packet_size) != 1) { - av_log(s, AV_LOG_ERROR, "Failed parsing packet size\n"); - return AVERROR_INVALIDDATA; - } - get_token(pb, token, sizeof(token)); //File ID - get_token(pb, token, sizeof(token)); //out size - get_token(pb, token, sizeof(token)); //stereo - if (sscanf(token, "%d", &stereo) != 1) { - av_log(s, AV_LOG_ERROR, "Failed parsing stereo flag\n"); - return AVERROR_INVALIDDATA; - } - get_token(pb, token, sizeof(token)); //Unknown1 - get_token(pb, token, sizeof(token)); //RateDivisor - if (sscanf(token, "%d", &rate_divisor) != 1) { - av_log(s, AV_LOG_ERROR, "Failed parsing rate_divisor\n"); - return AVERROR_INVALIDDATA; - } - get_token(pb, token, sizeof(token)); //Unknown2 - get_token(pb, token, sizeof(token)); //Version ID - get_token(pb, token, sizeof(token)); //Size - - if (iss->packet_size <= 0) { - av_log(s, AV_LOG_ERROR, "packet_size %d is invalid\n", iss->packet_size); - return AVERROR_INVALIDDATA; - } - - iss->sample_start_pos = avio_tell(pb); - - 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_IMA_ISS; - if (stereo) { - 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 = 44100; - if(rate_divisor > 0) - st->codec->sample_rate /= rate_divisor; - st->codec->bits_per_coded_sample = 4; - st->codec->bit_rate = st->codec->channels * st->codec->sample_rate - * st->codec->bits_per_coded_sample; - st->codec->block_align = iss->packet_size; - avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate); - - return 0; -} - -static int iss_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - IssDemuxContext *iss = s->priv_data; - int ret = av_get_packet(s->pb, pkt, iss->packet_size); - - if(ret != iss->packet_size) - return AVERROR(EIO); - - pkt->stream_index = 0; - pkt->pts = avio_tell(s->pb) - iss->sample_start_pos; - if(s->streams[0]->codec->channels > 0) - pkt->pts /= s->streams[0]->codec->channels*2; - return 0; -} - -AVInputFormat ff_iss_demuxer = { - .name = "iss", - .long_name = NULL_IF_CONFIG_SMALL("Funcom ISS"), - .priv_data_size = sizeof(IssDemuxContext), - .read_probe = iss_probe, - .read_header = iss_read_header, - .read_packet = iss_read_packet, -}; |