384 lines
16 KiB
C
384 lines
16 KiB
C
/*
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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 better probing than extensions matching
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*/
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#define MODPLUG_STATIC
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#include <libmodplug/modplug.h>
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#include "libavutil/avstring.h"
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#include "libavutil/eval.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "internal.h"
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typedef struct ModPlugContext {
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const AVClass *class;
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ModPlugFile *f;
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uint8_t *buf; ///< input file content
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/* options */
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int noise_reduction;
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int reverb_depth;
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int reverb_delay;
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int bass_amount;
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int bass_range;
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int surround_depth;
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int surround_delay;
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int max_size; ///< max file size to allocate
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/* optional video stream */
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double ts_per_packet; ///< used to define the pts/dts using packet_count;
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int packet_count; ///< total number of audio packets
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int print_textinfo; ///< bool flag for printing speed, tempo, order, ...
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int video_stream; ///< 1 if the user want a video stream, otherwise 0
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int w; ///< video stream width in char (one char = 8x8px)
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int h; ///< video stream height in char (one char = 8x8px)
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int video_switch; ///< 1 if current packet is video, otherwise 0
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int fsize; ///< constant frame size
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int linesize; ///< line size in bytes
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char *color_eval; ///< color eval user input expression
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AVExpr *expr; ///< parsed color eval expression
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} ModPlugContext;
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static const char * const var_names[] = {
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"x", "y",
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"w", "h",
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"t",
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"speed", "tempo", "order", "pattern", "row",
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NULL
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};
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enum var_name {
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VAR_X, VAR_Y,
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VAR_W, VAR_H,
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VAR_TIME,
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VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,
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VAR_VARS_NB
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};
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#define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M
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#define FF_MODPLUG_DEF_FILE_SIZE ( 5 * 1<<20) // 5M
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#define OFFSET(x) offsetof(ModPlugContext, x)
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#define D AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[] = {
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{"noise_reduction", "Enable noise reduction 0(off)-1(on)", OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},
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{"reverb_depth", "Reverb level 0(quiet)-100(loud)", OFFSET(reverb_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
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{"reverb_delay", "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
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{"bass_amount", "XBass level 0(quiet)-100(loud)", OFFSET(bass_amount), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
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{"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
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{"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D},
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{"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D},
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{"max_size", "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)",
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OFFSET(max_size), AV_OPT_TYPE_INT, {.i64 = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D},
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{"video_stream_expr", "Color formula", OFFSET(color_eval), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},
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{"video_stream", "Make demuxer output a video stream", OFFSET(video_stream), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D},
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{"video_stream_w", "Video stream width in char (one char = 8x8px)", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
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{"video_stream_h", "Video stream height in char (one char = 8x8px)", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D},
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{"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D},
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{NULL},
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};
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#define SET_OPT_IF_REQUESTED(libopt, opt, flag) do { \
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if (modplug->opt) { \
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settings.libopt = modplug->opt; \
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settings.mFlags |= flag; \
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} \
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} while (0)
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#define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \
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if (n_## entry_name ##s) { \
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unsigned i, n = 0; \
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\
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for (i = 0; i < n_## entry_name ##s; i++) { \
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char item_name[64] = {0}; \
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fname(f, i, item_name); \
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if (!*item_name) \
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continue; \
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if (n) \
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av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \
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av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \
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n++; \
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} \
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\
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extra = av_asprintf(", %u/%u " #entry_name "%s", \
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n, n_## entry_name ##s, n > 1 ? "s" : ""); \
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if (!extra) \
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return AVERROR(ENOMEM); \
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av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \
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av_free(extra); \
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} \
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} while (0)
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static int modplug_load_metadata(AVFormatContext *s)
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{
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ModPlugContext *modplug = s->priv_data;
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ModPlugFile *f = modplug->f;
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char *extra;
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const char *name = ModPlug_GetName(f);
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const char *msg = ModPlug_GetMessage(f);
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unsigned n_instruments = ModPlug_NumInstruments(f);
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unsigned n_samples = ModPlug_NumSamples(f);
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unsigned n_patterns = ModPlug_NumPatterns(f);
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unsigned n_channels = ModPlug_NumChannels(f);
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if (name && *name) av_dict_set(&s->metadata, "name", name, 0);
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if (msg && *msg) av_dict_set(&s->metadata, "message", msg, 0);
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extra = av_asprintf("%u pattern%s, %u channel%s",
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n_patterns, n_patterns > 1 ? "s" : "",
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n_channels, n_channels > 1 ? "s" : "");
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if (!extra)
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return AVERROR(ENOMEM);
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av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);
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ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);
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ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);
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return 0;
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}
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#define AUDIO_PKT_SIZE 512
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static int modplug_read_header(AVFormatContext *s)
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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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int64_t sz = avio_size(pb);
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if (sz < 0) {
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av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
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sz = modplug->max_size;
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} else if (modplug->max_size && sz > modplug->max_size) {
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sz = modplug->max_size;
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av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %"PRIi64"B "
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"but demuxing is likely to fail due to incomplete buffer\n",
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sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
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}
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if (modplug->color_eval) {
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int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names,
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NULL, NULL, NULL, NULL, 0, s);
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if (r < 0)
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return r;
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}
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modplug->buf = av_malloc(modplug->max_size);
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if (!modplug->buf)
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return AVERROR(ENOMEM);
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sz = avio_read(pb, modplug->buf, sz);
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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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if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;
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SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);
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SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);
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SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);
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SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);
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SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);
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SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);
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if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth;
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if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay;
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if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount;
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if (modplug->bass_range) settings.mBassRange = modplug->bass_range;
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if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;
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if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;
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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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av_freep(&modplug->buf);
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return AVERROR_INVALIDDATA;
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}
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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avpriv_set_pts_info(st, 64, 1, 1000);
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st->duration = ModPlug_GetLength(modplug->f);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
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st->codecpar->channels = settings.mChannels;
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st->codecpar->sample_rate = settings.mFrequency;
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// timebase = 1/1000, 2ch 16bits 44.1kHz-> 2*2*44100
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modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.);
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if (modplug->video_stream) {
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AVStream *vst = avformat_new_stream(s, NULL);
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if (!vst)
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return AVERROR(ENOMEM);
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avpriv_set_pts_info(vst, 64, 1, 1000);
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vst->duration = st->duration;
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vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codecpar->codec_id = AV_CODEC_ID_XBIN;
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vst->codecpar->width = modplug->w << 3;
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vst->codecpar->height = modplug->h << 3;
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modplug->linesize = modplug->w * 3;
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modplug->fsize = modplug->linesize * modplug->h;
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}
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return modplug_load_metadata(s);
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}
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static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y)
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{
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int i;
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dst += y*linesize + x*3;
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for (i = 0; s[i]; i++, dst += 3) {
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dst[0] = 0x0; // count - 1
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dst[1] = s[i]; // char
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dst[2] = 0x0f; // background / foreground
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}
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}
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#define PRINT_INFO(line, name, idvalue) do { \
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snprintf(intbuf, sizeof(intbuf), "%.0f", var_values[idvalue]); \
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write_text(pkt->data, name ":", modplug->linesize, 0+1, line+1); \
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write_text(pkt->data, intbuf, modplug->linesize, 10+1, line+1); \
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} while (0)
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static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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ModPlugContext *modplug = s->priv_data;
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int ret;
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if (modplug->video_stream) {
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modplug->video_switch ^= 1; // one video packet for one audio packet
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if (modplug->video_switch) {
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double var_values[VAR_VARS_NB];
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var_values[VAR_W ] = modplug->w;
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var_values[VAR_H ] = modplug->h;
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var_values[VAR_TIME ] = modplug->packet_count * modplug->ts_per_packet;
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var_values[VAR_SPEED ] = ModPlug_GetCurrentSpeed (modplug->f);
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var_values[VAR_TEMPO ] = ModPlug_GetCurrentTempo (modplug->f);
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var_values[VAR_ORDER ] = ModPlug_GetCurrentOrder (modplug->f);
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var_values[VAR_PATTERN] = ModPlug_GetCurrentPattern(modplug->f);
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var_values[VAR_ROW ] = ModPlug_GetCurrentRow (modplug->f);
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if ((ret = av_new_packet(pkt, modplug->fsize)) < 0)
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return ret;
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pkt->stream_index = 1;
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memset(pkt->data, 0, modplug->fsize);
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if (modplug->print_textinfo) {
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char intbuf[32];
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PRINT_INFO(0, "speed", VAR_SPEED);
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PRINT_INFO(1, "tempo", VAR_TEMPO);
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PRINT_INFO(2, "order", VAR_ORDER);
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PRINT_INFO(3, "pattern", VAR_PATTERN);
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PRINT_INFO(4, "row", VAR_ROW);
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PRINT_INFO(5, "ts", VAR_TIME);
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}
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if (modplug->expr) {
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int x, y;
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for (y = 0; y < modplug->h; y++) {
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for (x = 0; x < modplug->w; x++) {
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double color;
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var_values[VAR_X] = x;
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var_values[VAR_Y] = y;
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color = av_expr_eval(modplug->expr, var_values, NULL);
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pkt->data[y*modplug->linesize + x*3 + 2] |= av_clip((int)color, 0, 0xf)<<4;
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}
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}
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}
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pkt->pts = pkt->dts = var_values[VAR_TIME];
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pkt->flags |= AV_PKT_FLAG_KEY;
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return 0;
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}
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}
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if ((ret = av_new_packet(pkt, AUDIO_PKT_SIZE)) < 0)
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return ret;
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if (modplug->video_stream)
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pkt->pts = pkt->dts = modplug->packet_count++ * modplug->ts_per_packet;
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pkt->size = ModPlug_Read(modplug->f, pkt->data, AUDIO_PKT_SIZE);
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if (pkt->size <= 0) {
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return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO);
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}
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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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av_freep(&modplug->buf);
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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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ModPlugContext *modplug = s->priv_data;
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ModPlug_Seek(modplug->f, (int)ts);
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if (modplug->video_stream)
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modplug->packet_count = ts / modplug->ts_per_packet;
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return 0;
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}
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static const char modplug_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";
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static int modplug_probe(const AVProbeData *p)
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{
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if (av_match_ext(p->filename, modplug_extensions)) {
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if (p->buf_size < 16384)
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return AVPROBE_SCORE_EXTENSION/2-1;
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else
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return AVPROBE_SCORE_EXTENSION;
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}
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return 0;
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}
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static const AVClass modplug_class = {
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.class_name = "ModPlug demuxer",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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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_probe = modplug_probe,
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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 = modplug_extensions,
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.priv_class = &modplug_class,
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};
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