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-rw-r--r--libavformat/libmodplug.c236
1 files changed, 236 insertions, 0 deletions
diff --git a/libavformat/libmodplug.c b/libavformat/libmodplug.c
new file mode 100644
index 0000000000..edae4b34c9
--- /dev/null
+++ b/libavformat/libmodplug.c
@@ -0,0 +1,236 @@
+/*
+ * 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
+* ModPlug demuxer
+* @todo better probing than extensions matching
+*/
+
+#include <libmodplug/modplug.h>
+#include "libavutil/avstring.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+
+typedef struct ModPlugContext {
+ const AVClass *class;
+ ModPlugFile *f;
+ uint8_t *buf; ///< input file content
+
+ /* options */
+ int noise_reduction;
+ int reverb_depth;
+ int reverb_delay;
+ int bass_amount;
+ int bass_range;
+ int surround_depth;
+ int surround_delay;
+
+ int max_size; ///< max file size to allocate
+} ModPlugContext;
+
+#define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M
+#define FF_MODPLUG_DEF_FILE_SIZE ( 5 * 1<<20) // 5M
+
+#define OFFSET(x) offsetof(ModPlugContext, x)
+#define D AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ {"noise_reduction", "Enable noise reduction 0(off)-1(on)", OFFSET(noise_reduction), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 1, D},
+ {"reverb_depth", "Reverb level 0(quiet)-100(loud)", OFFSET(reverb_depth), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 100, D},
+ {"reverb_delay", "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, D},
+ {"bass_amount", "XBass level 0(quiet)-100(loud)", OFFSET(bass_amount), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 100, D},
+ {"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 100, D},
+ {"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 100, D},
+ {"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, D},
+ {"max_size", "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)",
+ OFFSET(max_size), FF_OPT_TYPE_INT, {.dbl = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},
+ {NULL},
+};
+
+#define SET_OPT_IF_REQUESTED(libopt, opt, flag) do { \
+ if (modplug->opt) { \
+ settings.libopt = modplug->opt; \
+ settings.mFlags |= flag; \
+ } \
+} while (0)
+
+#define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \
+ if (n_## entry_name ##s) { \
+ unsigned i, n = 0; \
+ \
+ for (i = 0; i < n_## entry_name ##s; i++) { \
+ char item_name[64] = {0}; \
+ fname(f, i, item_name); \
+ if (!*item_name) \
+ continue; \
+ if (n) \
+ av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \
+ av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \
+ n++; \
+ } \
+ \
+ extra = av_asprintf(", %u/%u " #entry_name "%s", \
+ n, n_## entry_name ##s, n > 1 ? "s" : ""); \
+ if (!extra) \
+ return AVERROR(ENOMEM); \
+ av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \
+ av_free(extra); \
+ } \
+} while (0)
+
+static int modplug_load_metadata(AVFormatContext *s)
+{
+ ModPlugContext *modplug = s->priv_data;
+ ModPlugFile *f = modplug->f;
+ char *extra;
+ const char *name = ModPlug_GetName(f);
+ const char *msg = ModPlug_GetMessage(f);
+
+ unsigned n_instruments = ModPlug_NumInstruments(f);
+ unsigned n_samples = ModPlug_NumSamples(f);
+ unsigned n_patterns = ModPlug_NumPatterns(f);
+ unsigned n_channels = ModPlug_NumChannels(f);
+
+ if (name && *name) av_dict_set(&s->metadata, "name", name, 0);
+ if (msg && *msg) av_dict_set(&s->metadata, "message", msg, 0);
+
+ extra = av_asprintf("%u pattern%s, %u channel%s",
+ n_patterns, n_patterns > 1 ? "s" : "",
+ n_channels, n_channels > 1 ? "s" : "");
+ if (!extra)
+ return AVERROR(ENOMEM);
+ av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);
+
+ ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);
+ ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);
+
+ return 0;
+}
+
+static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+ AVStream *st;
+ AVIOContext *pb = s->pb;
+ ModPlug_Settings settings;
+ ModPlugContext *modplug = s->priv_data;
+ int sz = avio_size(pb);
+
+ if (sz < 0) {
+ av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
+ sz = modplug->max_size;
+ } else if (modplug->max_size && sz > modplug->max_size) {
+ sz = modplug->max_size;
+ av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %dB "
+ "but demuxing is likely to fail due to incomplete buffer\n",
+ sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
+ }
+ modplug->buf = av_malloc(modplug->max_size);
+ if (!modplug->buf)
+ return AVERROR(ENOMEM);
+ sz = avio_read(pb, modplug->buf, sz);
+
+ ModPlug_GetSettings(&settings);
+ settings.mChannels = 2;
+ settings.mBits = 16;
+ settings.mFrequency = 44100;
+ settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
+ settings.mLoopCount = 0; // prevents looping forever
+
+ if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;
+ SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);
+ SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);
+ SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);
+ SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);
+ SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);
+ SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);
+
+ if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth;
+ if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay;
+ if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount;
+ if (modplug->bass_range) settings.mBassRange = modplug->bass_range;
+ if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;
+ if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;
+
+ ModPlug_SetSettings(&settings);
+
+ modplug->f = ModPlug_Load(modplug->buf, sz);
+ if (!modplug->f)
+ return AVERROR_INVALIDDATA;
+
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR(ENOMEM);
+ av_set_pts_info(st, 64, 1, 1000);
+ st->duration = ModPlug_GetLength(modplug->f);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = CODEC_ID_PCM_S16LE;
+ st->codec->channels = settings.mChannels;
+ st->codec->sample_rate = settings.mFrequency;
+
+ return modplug_load_metadata(s);
+}
+
+static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ ModPlugContext *modplug = s->priv_data;
+
+ if (av_new_packet(pkt, 512) < 0)
+ return AVERROR(ENOMEM);
+
+ pkt->size = ModPlug_Read(modplug->f, pkt->data, 512);
+ if (pkt->size <= 0) {
+ av_free_packet(pkt);
+ return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);
+ }
+ return 0;
+}
+
+static int modplug_read_close(AVFormatContext *s)
+{
+ ModPlugContext *modplug = s->priv_data;
+ ModPlug_Unload(modplug->f);
+ av_freep(&modplug->buf);
+ return 0;
+}
+
+static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
+{
+ const ModPlugContext *modplug = s->priv_data;
+ ModPlug_Seek(modplug->f, (int)ts);
+ return 0;
+}
+
+static const AVClass modplug_class = {
+ .class_name = "ModPlug demuxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_libmodplug_demuxer = {
+ .name = "libmodplug",
+ .long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
+ .priv_data_size = sizeof(ModPlugContext),
+ .read_header = modplug_read_header,
+ .read_packet = modplug_read_packet,
+ .read_close = modplug_read_close,
+ .read_seek = modplug_read_seek,
+ .extensions = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm"
+ ",itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz", // compressed mods
+ .priv_class = &modplug_class,
+};
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