diff options
Diffstat (limited to 'ffmpeg/libavformat/sol.c')
| -rw-r--r-- | ffmpeg/libavformat/sol.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/ffmpeg/libavformat/sol.c b/ffmpeg/libavformat/sol.c deleted file mode 100644 index 77c754a..0000000 --- a/ffmpeg/libavformat/sol.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Sierra SOL demuxer - * Copyright 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 - */ - -/* - * Based on documents from Game Audio Player and own research - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/intreadwrite.h" -#include "avformat.h" -#include "internal.h" -#include "pcm.h" - -/* if we don't know the size in advance */ -#define AU_UNKNOWN_SIZE ((uint32_t)(~0)) - -static int sol_probe(AVProbeData *p) -{ - /* check file header */ - uint16_t magic = AV_RL32(p->buf); - if ((magic == 0x0B8D || magic == 0x0C0D || magic == 0x0C8D) && - p->buf[2] == 'S' && p->buf[3] == 'O' && - p->buf[4] == 'L' && p->buf[5] == 0) - return AVPROBE_SCORE_MAX; - else - return 0; -} - -#define SOL_DPCM 1 -#define SOL_16BIT 4 -#define SOL_STEREO 16 - -static enum AVCodecID sol_codec_id(int magic, int type) -{ - if (magic == 0x0B8D) - { - if (type & SOL_DPCM) return AV_CODEC_ID_SOL_DPCM; - else return AV_CODEC_ID_PCM_U8; - } - if (type & SOL_DPCM) - { - if (type & SOL_16BIT) return AV_CODEC_ID_SOL_DPCM; - else if (magic == 0x0C8D) return AV_CODEC_ID_SOL_DPCM; - else return AV_CODEC_ID_SOL_DPCM; - } - if (type & SOL_16BIT) return AV_CODEC_ID_PCM_S16LE; - return AV_CODEC_ID_PCM_U8; -} - -static int sol_codec_type(int magic, int type) -{ - if (magic == 0x0B8D) return 1;//SOL_DPCM_OLD; - if (type & SOL_DPCM) - { - if (type & SOL_16BIT) return 3;//SOL_DPCM_NEW16; - else if (magic == 0x0C8D) return 1;//SOL_DPCM_OLD; - else return 2;//SOL_DPCM_NEW8; - } - return -1; -} - -static int sol_channels(int magic, int type) -{ - if (magic == 0x0B8D || !(type & SOL_STEREO)) return 1; - return 2; -} - -static int sol_read_header(AVFormatContext *s) -{ - unsigned int magic,tag; - AVIOContext *pb = s->pb; - unsigned int id, channels, rate, type; - enum AVCodecID codec; - AVStream *st; - - /* check ".snd" header */ - magic = avio_rl16(pb); - tag = avio_rl32(pb); - if (tag != MKTAG('S', 'O', 'L', 0)) - return -1; - rate = avio_rl16(pb); - type = avio_r8(pb); - avio_skip(pb, 4); /* size */ - if (magic != 0x0B8D) - avio_r8(pb); /* newer SOLs contain padding byte */ - - codec = sol_codec_id(magic, type); - channels = sol_channels(magic, type); - - if (codec == AV_CODEC_ID_SOL_DPCM) - id = sol_codec_type(magic, type); - else id = 0; - - /* now we are ready: build format streams */ - st = avformat_new_stream(s, NULL); - if (!st) - return -1; - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->codec_tag = id; - st->codec->codec_id = codec; - st->codec->channels = channels; - st->codec->channel_layout = channels == 1 ? AV_CH_LAYOUT_MONO : - AV_CH_LAYOUT_STEREO; - st->codec->sample_rate = rate; - avpriv_set_pts_info(st, 64, 1, rate); - return 0; -} - -#define MAX_SIZE 4096 - -static int sol_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - int ret; - - if (url_feof(s->pb)) - return AVERROR(EIO); - ret= av_get_packet(s->pb, pkt, MAX_SIZE); - if (ret < 0) - return ret; - pkt->flags &= ~AV_PKT_FLAG_CORRUPT; - pkt->stream_index = 0; - return 0; -} - -AVInputFormat ff_sol_demuxer = { - .name = "sol", - .long_name = NULL_IF_CONFIG_SMALL("Sierra SOL"), - .read_probe = sol_probe, - .read_header = sol_read_header, - .read_packet = sol_read_packet, - .read_seek = ff_pcm_read_seek, -}; |