mirror of https://github.com/FFmpeg/FFmpeg.git
Clément Bœsch
13 years ago
parent
073effb6e4
commit
26c7ff9317
7 changed files with 122 additions and 1 deletions
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/*
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* ModPlug demuxer |
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* @todo ModPlug options (noise reduction, reverb, bass boost, ...) |
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* @todo metadata |
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*/ |
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#include <libmodplug/modplug.h> |
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#include "avformat.h" |
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typedef struct ModPlugContext { |
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ModPlugFile *f; |
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uint8_t buf[5 * 1<<20]; ///< input file content, 5M max
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} ModPlugContext; |
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static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap) |
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{ |
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AVStream *st; |
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AVIOContext *pb = s->pb; |
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ModPlug_Settings settings; |
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ModPlugContext *modplug = s->priv_data; |
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int sz = avio_read(pb, modplug->buf, sizeof modplug->buf); |
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ModPlug_GetSettings(&settings); |
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settings.mChannels = 2; |
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settings.mBits = 16; |
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settings.mFrequency = 44100; |
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settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
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settings.mLoopCount = 0; // prevents looping forever
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ModPlug_SetSettings(&settings); |
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modplug->f = ModPlug_Load(modplug->buf, sz); |
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if (!modplug->f) |
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return AVERROR_INVALIDDATA; |
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st = av_new_stream(s, 0); |
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if (!st) |
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return AVERROR(ENOMEM); |
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av_set_pts_info(st, 64, 1, 1000); |
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st->duration = ModPlug_GetLength(modplug->f); |
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->codec_id = CODEC_ID_PCM_S16LE; |
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st->codec->channels = settings.mChannels; |
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st->codec->sample_rate = settings.mFrequency; |
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return 0; |
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} |
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static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret, n; |
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ModPlugContext *modplug = s->priv_data; |
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uint8_t buf[512]; |
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n = ModPlug_Read(modplug->f, buf, sizeof buf); |
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if (n <= 0) |
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return AVERROR(EIO); |
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ret = av_new_packet(pkt, n); |
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if (ret) |
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return ret; |
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pkt->pts = pkt->dts = AV_NOPTS_VALUE; |
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pkt->size = n; |
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memcpy(pkt->data, buf, n); |
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return 0; |
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} |
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static int modplug_read_close(AVFormatContext *s) |
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{ |
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ModPlugContext *modplug = s->priv_data; |
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ModPlug_Unload(modplug->f); |
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return 0; |
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} |
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static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags) |
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{ |
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const ModPlugContext *modplug = s->priv_data; |
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ModPlug_Seek(modplug->f, (int)ts); |
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return 0; |
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} |
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AVInputFormat ff_libmodplug_demuxer = { |
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.name = "libmodplug", |
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.long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"), |
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.priv_data_size = sizeof(ModPlugContext), |
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.read_header = modplug_read_header, |
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.read_packet = modplug_read_packet, |
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.read_close = modplug_read_close, |
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.read_seek = modplug_read_seek, |
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.extensions = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm" |
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",itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz", // compressed mods
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}; |
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